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Annotation of mandoc/roff.c, Revision 1.266

1.266   ! schwarze    1: /*     $Id: roff.c,v 1.265 2015/04/18 17:28:36 schwarze Exp $ */
1.1       kristaps    2: /*
1.265     schwarze    3:  * Copyright (c) 2009-2012, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
1.247     schwarze    4:  * Copyright (c) 2010-2015 Ingo Schwarze <schwarze@openbsd.org>
1.1       kristaps    5:  *
                      6:  * Permission to use, copy, modify, and distribute this software for any
1.66      kristaps    7:  * purpose with or without fee is hereby granted, provided that the above
                      8:  * copyright notice and this permission notice appear in all copies.
1.1       kristaps    9:  *
1.106     kristaps   10:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
1.66      kristaps   11:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.106     kristaps   12:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
1.66      kristaps   13:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     14:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     15:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     16:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1       kristaps   17:  */
1.66      kristaps   18: #include "config.h"
1.225     schwarze   19:
                     20: #include <sys/types.h>
1.30      kristaps   21:
1.67      kristaps   22: #include <assert.h>
1.85      kristaps   23: #include <ctype.h>
1.245     schwarze   24: #include <limits.h>
1.178     schwarze   25: #include <stdio.h>
1.1       kristaps   26: #include <stdlib.h>
1.67      kristaps   27: #include <string.h>
1.1       kristaps   28:
1.67      kristaps   29: #include "mandoc.h"
1.201     schwarze   30: #include "mandoc_aux.h"
1.265     schwarze   31: #include "roff.h"
1.226     schwarze   32: #include "libmandoc.h"
1.266   ! schwarze   33: #include "roff_int.h"
1.109     kristaps   34: #include "libroff.h"
1.266   ! schwarze   35: #include "libmdoc.h"
1.33      kristaps   36:
1.141     kristaps   37: /* Maximum number of nested if-else conditionals. */
1.82      kristaps   38: #define        RSTACK_MAX      128
                     39:
1.170     schwarze   40: /* Maximum number of string expansions per line, to break infinite loops. */
                     41: #define        EXPAND_LIMIT    1000
                     42:
1.266   ! schwarze   43: /* --- data types --------------------------------------------------------- */
        !            44:
1.67      kristaps   45: enum   rofft {
1.251     schwarze   46:        ROFF_ab,
1.103     kristaps   47:        ROFF_ad,
1.251     schwarze   48:        ROFF_af,
                     49:        ROFF_aln,
                     50:        ROFF_als,
1.80      kristaps   51:        ROFF_am,
1.251     schwarze   52:        ROFF_am1,
1.80      kristaps   53:        ROFF_ami,
1.251     schwarze   54:        ROFF_ami1,
1.193     schwarze   55:        ROFF_as,
1.251     schwarze   56:        ROFF_as1,
                     57:        ROFF_asciify,
                     58:        ROFF_backtrace,
                     59:        ROFF_bd,
                     60:        ROFF_bleedat,
                     61:        ROFF_blm,
                     62:        ROFF_box,
                     63:        ROFF_boxa,
                     64:        ROFF_bp,
                     65:        ROFF_BP,
                     66:        /* MAN_br, MDOC_br */
                     67:        ROFF_break,
                     68:        ROFF_breakchar,
                     69:        ROFF_brnl,
                     70:        ROFF_brp,
                     71:        ROFF_brpnl,
                     72:        ROFF_c2,
1.174     kristaps   73:        ROFF_cc,
1.194     schwarze   74:        ROFF_ce,
1.251     schwarze   75:        ROFF_cf,
                     76:        ROFF_cflags,
                     77:        ROFF_ch,
                     78:        ROFF_char,
                     79:        ROFF_chop,
                     80:        ROFF_class,
                     81:        ROFF_close,
                     82:        ROFF_CL,
                     83:        ROFF_color,
                     84:        ROFF_composite,
                     85:        ROFF_continue,
                     86:        ROFF_cp,
                     87:        ROFF_cropat,
                     88:        ROFF_cs,
                     89:        ROFF_cu,
                     90:        ROFF_da,
                     91:        ROFF_dch,
                     92:        ROFF_Dd,
1.80      kristaps   93:        ROFF_de,
1.251     schwarze   94:        ROFF_de1,
                     95:        ROFF_defcolor,
1.80      kristaps   96:        ROFF_dei,
1.251     schwarze   97:        ROFF_dei1,
                     98:        ROFF_device,
                     99:        ROFF_devicem,
                    100:        ROFF_di,
                    101:        ROFF_do,
1.83      schwarze  102:        ROFF_ds,
1.251     schwarze  103:        ROFF_ds1,
                    104:        ROFF_dwh,
                    105:        ROFF_dt,
                    106:        ROFF_ec,
                    107:        ROFF_ecr,
                    108:        ROFF_ecs,
1.82      kristaps  109:        ROFF_el,
1.251     schwarze  110:        ROFF_em,
                    111:        ROFF_EN,
                    112:        ROFF_eo,
                    113:        ROFF_EP,
                    114:        ROFF_EQ,
                    115:        ROFF_errprint,
                    116:        ROFF_ev,
                    117:        ROFF_evc,
                    118:        ROFF_ex,
                    119:        ROFF_fallback,
1.185     schwarze  120:        ROFF_fam,
1.251     schwarze  121:        ROFF_fc,
                    122:        ROFF_fchar,
                    123:        ROFF_fcolor,
                    124:        ROFF_fdeferlig,
                    125:        ROFF_feature,
                    126:        /* MAN_fi; ignored in mdoc(7) */
                    127:        ROFF_fkern,
                    128:        ROFF_fl,
                    129:        ROFF_flig,
                    130:        ROFF_fp,
                    131:        ROFF_fps,
                    132:        ROFF_fschar,
                    133:        ROFF_fspacewidth,
                    134:        ROFF_fspecial,
                    135:        /* MAN_ft; ignored in mdoc(7) */
                    136:        ROFF_ftr,
                    137:        ROFF_fzoom,
                    138:        ROFF_gcolor,
                    139:        ROFF_hc,
                    140:        ROFF_hcode,
                    141:        ROFF_hidechar,
                    142:        ROFF_hla,
                    143:        ROFF_hlm,
                    144:        ROFF_hpf,
                    145:        ROFF_hpfa,
                    146:        ROFF_hpfcode,
1.186     schwarze  147:        ROFF_hw,
1.103     kristaps  148:        ROFF_hy,
1.251     schwarze  149:        ROFF_hylang,
                    150:        ROFF_hylen,
                    151:        ROFF_hym,
                    152:        ROFF_hypp,
                    153:        ROFF_hys,
1.82      kristaps  154:        ROFF_ie,
1.75      kristaps  155:        ROFF_if,
1.76      kristaps  156:        ROFF_ig,
1.251     schwarze  157:        /* MAN_in; ignored in mdoc(7) */
                    158:        ROFF_index,
1.123     schwarze  159:        ROFF_it,
1.251     schwarze  160:        ROFF_itc,
                    161:        ROFF_IX,
                    162:        ROFF_kern,
                    163:        ROFF_kernafter,
                    164:        ROFF_kernbefore,
                    165:        ROFF_kernpair,
                    166:        ROFF_lc,
                    167:        ROFF_lc_ctype,
                    168:        ROFF_lds,
                    169:        ROFF_length,
                    170:        ROFF_letadj,
                    171:        ROFF_lf,
                    172:        ROFF_lg,
                    173:        ROFF_lhang,
                    174:        ROFF_linetabs,
                    175:        /* MAN_ll, MDOC_ll */
                    176:        ROFF_lnr,
                    177:        ROFF_lnrf,
                    178:        ROFF_lpfx,
                    179:        ROFF_ls,
                    180:        ROFF_lsm,
                    181:        ROFF_lt,
                    182:        ROFF_mc,
                    183:        ROFF_mediasize,
                    184:        ROFF_minss,
                    185:        ROFF_mk,
                    186:        ROFF_mso,
1.256     schwarze  187:        ROFF_na,
1.103     kristaps  188:        ROFF_ne,
1.251     schwarze  189:        /* MAN_nf; ignored in mdoc(7) */
1.103     kristaps  190:        ROFF_nh,
1.251     schwarze  191:        ROFF_nhychar,
                    192:        ROFF_nm,
                    193:        ROFF_nn,
                    194:        ROFF_nop,
1.104     kristaps  195:        ROFF_nr,
1.251     schwarze  196:        ROFF_nrf,
                    197:        ROFF_nroff,
1.124     schwarze  198:        ROFF_ns,
1.251     schwarze  199:        ROFF_nx,
                    200:        ROFF_open,
                    201:        ROFF_opena,
                    202:        ROFF_os,
                    203:        ROFF_output,
                    204:        ROFF_padj,
                    205:        ROFF_papersize,
                    206:        ROFF_pc,
                    207:        ROFF_pev,
                    208:        ROFF_pi,
                    209:        ROFF_PI,
1.229     schwarze  210:        ROFF_pl,
1.251     schwarze  211:        ROFF_pm,
                    212:        ROFF_pn,
                    213:        ROFF_pnr,
                    214:        ROFF_po,
1.124     schwarze  215:        ROFF_ps,
1.251     schwarze  216:        ROFF_psbb,
                    217:        ROFF_pshape,
                    218:        ROFF_pso,
                    219:        ROFF_ptr,
                    220:        ROFF_pvs,
                    221:        ROFF_rchar,
                    222:        ROFF_rd,
                    223:        ROFF_recursionlimit,
                    224:        ROFF_return,
                    225:        ROFF_rfschar,
                    226:        ROFF_rhang,
                    227:        ROFF_rj,
1.83      schwarze  228:        ROFF_rm,
1.251     schwarze  229:        ROFF_rn,
                    230:        ROFF_rnn,
1.203     schwarze  231:        ROFF_rr,
1.251     schwarze  232:        ROFF_rs,
                    233:        ROFF_rt,
                    234:        ROFF_schar,
                    235:        ROFF_sentchar,
                    236:        ROFF_shc,
                    237:        ROFF_shift,
                    238:        ROFF_sizes,
1.105     kristaps  239:        ROFF_so,
1.251     schwarze  240:        /* MAN_sp, MDOC_sp */
                    241:        ROFF_spacewidth,
                    242:        ROFF_special,
                    243:        ROFF_spreadwarn,
                    244:        ROFF_ss,
                    245:        ROFF_sty,
                    246:        ROFF_substring,
                    247:        ROFF_sv,
                    248:        ROFF_sy,
                    249:        ROFF_T_,
1.124     schwarze  250:        ROFF_ta,
1.251     schwarze  251:        ROFF_tc,
                    252:        ROFF_TE,
                    253:        ROFF_TH,
                    254:        ROFF_ti,
                    255:        ROFF_tkf,
                    256:        ROFF_tl,
                    257:        ROFF_tm,
                    258:        ROFF_tm1,
                    259:        ROFF_tmc,
1.83      schwarze  260:        ROFF_tr,
1.251     schwarze  261:        ROFF_track,
                    262:        ROFF_transchar,
                    263:        ROFF_trf,
                    264:        ROFF_trimat,
                    265:        ROFF_trin,
                    266:        ROFF_trnt,
                    267:        ROFF_troff,
1.109     kristaps  268:        ROFF_TS,
1.251     schwarze  269:        ROFF_uf,
                    270:        ROFF_ul,
                    271:        ROFF_unformat,
                    272:        ROFF_unwatch,
                    273:        ROFF_unwatchn,
                    274:        ROFF_vpt,
                    275:        ROFF_vs,
                    276:        ROFF_warn,
                    277:        ROFF_warnscale,
                    278:        ROFF_watch,
                    279:        ROFF_watchlength,
                    280:        ROFF_watchn,
                    281:        ROFF_wh,
                    282:        ROFF_while,
                    283:        ROFF_write,
                    284:        ROFF_writec,
                    285:        ROFF_writem,
                    286:        ROFF_xflag,
1.76      kristaps  287:        ROFF_cblock,
1.106     kristaps  288:        ROFF_USERDEF,
1.67      kristaps  289:        ROFF_MAX
                    290: };
                    291:
1.147     kristaps  292: /*
1.167     kristaps  293:  * An incredibly-simple string buffer.
                    294:  */
1.94      kristaps  295: struct roffstr {
1.167     kristaps  296:        char            *p; /* nil-terminated buffer */
                    297:        size_t           sz; /* saved strlen(p) */
1.166     kristaps  298: };
                    299:
                    300: /*
1.167     kristaps  301:  * A key-value roffstr pair as part of a singly-linked list.
1.166     kristaps  302:  */
                    303: struct roffkv {
                    304:        struct roffstr   key;
                    305:        struct roffstr   val;
                    306:        struct roffkv   *next; /* next in list */
1.94      kristaps  307: };
                    308:
1.180     schwarze  309: /*
                    310:  * A single number register as part of a singly-linked list.
                    311:  */
                    312: struct roffreg {
                    313:        struct roffstr   key;
1.181     schwarze  314:        int              val;
1.180     schwarze  315:        struct roffreg  *next;
                    316: };
                    317:
1.67      kristaps  318: struct roff {
1.128     kristaps  319:        struct mparse   *parse; /* parse point */
1.237     schwarze  320:        const struct mchars *mchars; /* character table */
1.67      kristaps  321:        struct roffnode *last; /* leaf of stack */
1.223     schwarze  322:        int             *rstack; /* stack of inverted `ie' values */
1.180     schwarze  323:        struct roffreg  *regtab; /* number registers */
1.166     kristaps  324:        struct roffkv   *strtab; /* user-defined strings & macros */
1.167     kristaps  325:        struct roffkv   *xmbtab; /* multi-byte trans table (`tr') */
                    326:        struct roffstr  *xtab; /* single-byte trans table (`tr') */
1.106     kristaps  327:        const char      *current_string; /* value of last called user macro */
1.118     kristaps  328:        struct tbl_node *first_tbl; /* first table parsed */
                    329:        struct tbl_node *last_tbl; /* last table parsed */
                    330:        struct tbl_node *tbl; /* current table being parsed */
1.125     kristaps  331:        struct eqn_node *last_eqn; /* last equation parsed */
                    332:        struct eqn_node *first_eqn; /* first equation parsed */
                    333:        struct eqn_node *eqn; /* current equation being parsed */
1.230     schwarze  334:        int              eqn_inline; /* current equation is inline */
1.223     schwarze  335:        int              options; /* parse options */
                    336:        int              rstacksz; /* current size limit of rstack */
                    337:        int              rstackpos; /* position in rstack */
1.227     schwarze  338:        int              format; /* current file in mdoc or man format */
1.223     schwarze  339:        char             control; /* control character */
1.79      kristaps  340: };
                    341:
1.67      kristaps  342: struct roffnode {
                    343:        enum rofft       tok; /* type of node */
                    344:        struct roffnode *parent; /* up one in stack */
                    345:        int              line; /* parse line */
                    346:        int              col; /* parse col */
1.106     kristaps  347:        char            *name; /* node name, e.g. macro name */
1.79      kristaps  348:        char            *end; /* end-rules: custom token */
                    349:        int              endspan; /* end-rules: next-line or infty */
1.198     schwarze  350:        int              rule; /* current evaluation rule */
1.67      kristaps  351: };
                    352:
                    353: #define        ROFF_ARGS        struct roff *r, /* parse ctx */ \
1.72      kristaps  354:                         enum rofft tok, /* tok of macro */ \
1.238     schwarze  355:                         struct buf *buf, /* input buffer */ \
1.67      kristaps  356:                         int ln, /* parse line */ \
1.75      kristaps  357:                         int ppos, /* original pos in buffer */ \
                    358:                         int pos, /* current pos in buffer */ \
1.74      kristaps  359:                         int *offs /* reset offset of buffer data */
1.67      kristaps  360:
                    361: typedef        enum rofferr (*roffproc)(ROFF_ARGS);
                    362:
                    363: struct roffmac {
                    364:        const char      *name; /* macro name */
1.79      kristaps  365:        roffproc         proc; /* process new macro */
                    366:        roffproc         text; /* process as child text of macro */
                    367:        roffproc         sub; /* process as child of macro */
                    368:        int              flags;
                    369: #define        ROFFMAC_STRUCT  (1 << 0) /* always interpret */
1.85      kristaps  370:        struct roffmac  *next;
1.67      kristaps  371: };
                    372:
1.141     kristaps  373: struct predef {
                    374:        const char      *name; /* predefined input name */
                    375:        const char      *str; /* replacement symbol */
                    376: };
                    377:
                    378: #define        PREDEF(__name, __str) \
                    379:        { (__name), (__str) },
                    380:
1.266   ! schwarze  381: /* --- function prototypes ------------------------------------------------ */
        !           382:
1.155     kristaps  383: static enum rofft       roffhash_find(const char *, size_t);
                    384: static void             roffhash_init(void);
                    385: static void             roffnode_cleanscope(struct roff *);
                    386: static void             roffnode_pop(struct roff *);
                    387: static void             roffnode_push(struct roff *, enum rofft,
                    388:                                const char *, int, int);
1.80      kristaps  389: static enum rofferr     roff_block(ROFF_ARGS);
                    390: static enum rofferr     roff_block_text(ROFF_ARGS);
                    391: static enum rofferr     roff_block_sub(ROFF_ARGS);
1.251     schwarze  392: static enum rofferr     roff_brp(ROFF_ARGS);
1.80      kristaps  393: static enum rofferr     roff_cblock(ROFF_ARGS);
1.174     kristaps  394: static enum rofferr     roff_cc(ROFF_ARGS);
1.195     schwarze  395: static void             roff_ccond(struct roff *, int, int);
1.82      kristaps  396: static enum rofferr     roff_cond(ROFF_ARGS);
                    397: static enum rofferr     roff_cond_text(ROFF_ARGS);
                    398: static enum rofferr     roff_cond_sub(ROFF_ARGS);
1.92      schwarze  399: static enum rofferr     roff_ds(ROFF_ARGS);
1.238     schwarze  400: static enum rofferr     roff_eqndelim(struct roff *, struct buf *, int);
1.234     kristaps  401: static int              roff_evalcond(struct roff *r, int,
                    402:                                const char *, int *);
                    403: static int              roff_evalnum(struct roff *, int,
                    404:                                const char *, int *, int *, int);
                    405: static int              roff_evalpar(struct roff *, int,
1.261     schwarze  406:                                const char *, int *, int *, int);
1.198     schwarze  407: static int              roff_evalstrcond(const char *, int *);
1.155     kristaps  408: static void             roff_free1(struct roff *);
1.180     schwarze  409: static void             roff_freereg(struct roffreg *);
1.167     kristaps  410: static void             roff_freestr(struct roffkv *);
1.212     schwarze  411: static size_t           roff_getname(struct roff *, char **, int, int);
1.261     schwarze  412: static int              roff_getnum(const char *, int *, int *, int);
1.184     schwarze  413: static int              roff_getop(const char *, int *, char *);
1.181     schwarze  414: static int              roff_getregn(const struct roff *,
                    415:                                const char *, size_t);
1.192     schwarze  416: static int              roff_getregro(const char *name);
1.207     schwarze  417: static const char      *roff_getstrn(const struct roff *,
1.94      kristaps  418:                                const char *, size_t);
1.251     schwarze  419: static enum rofferr     roff_insec(ROFF_ARGS);
1.178     schwarze  420: static enum rofferr     roff_it(ROFF_ARGS);
1.103     kristaps  421: static enum rofferr     roff_line_ignore(ROFF_ARGS);
1.265     schwarze  422: static void             roff_man_alloc1(struct roff_man *);
                    423: static void             roff_man_free1(struct roff_man *);
1.89      kristaps  424: static enum rofferr     roff_nr(ROFF_ARGS);
1.214     schwarze  425: static enum rofft       roff_parse(struct roff *, char *, int *,
                    426:                                int, int);
1.238     schwarze  427: static enum rofferr     roff_parsetext(struct buf *, int, int *);
                    428: static enum rofferr     roff_res(struct roff *, struct buf *, int, int);
1.122     schwarze  429: static enum rofferr     roff_rm(ROFF_ARGS);
1.203     schwarze  430: static enum rofferr     roff_rr(ROFF_ARGS);
1.94      kristaps  431: static void             roff_setstr(struct roff *,
1.106     kristaps  432:                                const char *, const char *, int);
1.207     schwarze  433: static void             roff_setstrn(struct roffkv **, const char *,
1.164     kristaps  434:                                size_t, const char *, size_t, int);
1.105     kristaps  435: static enum rofferr     roff_so(ROFF_ARGS);
1.164     kristaps  436: static enum rofferr     roff_tr(ROFF_ARGS);
1.175     schwarze  437: static enum rofferr     roff_Dd(ROFF_ARGS);
                    438: static enum rofferr     roff_TH(ROFF_ARGS);
1.109     kristaps  439: static enum rofferr     roff_TE(ROFF_ARGS);
                    440: static enum rofferr     roff_TS(ROFF_ARGS);
1.125     kristaps  441: static enum rofferr     roff_EQ(ROFF_ARGS);
                    442: static enum rofferr     roff_EN(ROFF_ARGS);
1.112     kristaps  443: static enum rofferr     roff_T_(ROFF_ARGS);
1.251     schwarze  444: static enum rofferr     roff_unsupp(ROFF_ARGS);
1.106     kristaps  445: static enum rofferr     roff_userdef(ROFF_ARGS);
1.67      kristaps  446:
1.266   ! schwarze  447: /* --- constant data ------------------------------------------------------ */
        !           448:
1.155     kristaps  449: /* See roffhash_find() */
1.85      kristaps  450:
                    451: #define        ASCII_HI         126
                    452: #define        ASCII_LO         33
                    453: #define        HASHWIDTH       (ASCII_HI - ASCII_LO + 1)
                    454:
1.261     schwarze  455: #define        ROFFNUM_SCALE   (1 << 0)  /* Honour scaling in roff_getnum(). */
                    456: #define        ROFFNUM_WHITE   (1 << 1)  /* Skip whitespace in roff_evalnum(). */
                    457:
1.85      kristaps  458: static struct roffmac  *hash[HASHWIDTH];
                    459:
                    460: static struct roffmac   roffs[ROFF_MAX] = {
1.251     schwarze  461:        { "ab", roff_unsupp, NULL, NULL, 0, NULL },
1.103     kristaps  462:        { "ad", roff_line_ignore, NULL, NULL, 0, NULL },
1.251     schwarze  463:        { "af", roff_line_ignore, NULL, NULL, 0, NULL },
                    464:        { "aln", roff_unsupp, NULL, NULL, 0, NULL },
                    465:        { "als", roff_unsupp, NULL, NULL, 0, NULL },
1.85      kristaps  466:        { "am", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.251     schwarze  467:        { "am1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.85      kristaps  468:        { "ami", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.251     schwarze  469:        { "ami1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.193     schwarze  470:        { "as", roff_ds, NULL, NULL, 0, NULL },
1.251     schwarze  471:        { "as1", roff_ds, NULL, NULL, 0, NULL },
                    472:        { "asciify", roff_unsupp, NULL, NULL, 0, NULL },
                    473:        { "backtrace", roff_line_ignore, NULL, NULL, 0, NULL },
                    474:        { "bd", roff_line_ignore, NULL, NULL, 0, NULL },
                    475:        { "bleedat", roff_line_ignore, NULL, NULL, 0, NULL },
                    476:        { "blm", roff_unsupp, NULL, NULL, 0, NULL },
                    477:        { "box", roff_unsupp, NULL, NULL, 0, NULL },
                    478:        { "boxa", roff_unsupp, NULL, NULL, 0, NULL },
                    479:        { "bp", roff_line_ignore, NULL, NULL, 0, NULL },
                    480:        { "BP", roff_unsupp, NULL, NULL, 0, NULL },
                    481:        { "break", roff_unsupp, NULL, NULL, 0, NULL },
                    482:        { "breakchar", roff_line_ignore, NULL, NULL, 0, NULL },
                    483:        { "brnl", roff_line_ignore, NULL, NULL, 0, NULL },
                    484:        { "brp", roff_brp, NULL, NULL, 0, NULL },
                    485:        { "brpnl", roff_line_ignore, NULL, NULL, 0, NULL },
                    486:        { "c2", roff_unsupp, NULL, NULL, 0, NULL },
1.174     kristaps  487:        { "cc", roff_cc, NULL, NULL, 0, NULL },
1.194     schwarze  488:        { "ce", roff_line_ignore, NULL, NULL, 0, NULL },
1.251     schwarze  489:        { "cf", roff_insec, NULL, NULL, 0, NULL },
                    490:        { "cflags", roff_line_ignore, NULL, NULL, 0, NULL },
                    491:        { "ch", roff_line_ignore, NULL, NULL, 0, NULL },
                    492:        { "char", roff_unsupp, NULL, NULL, 0, NULL },
                    493:        { "chop", roff_unsupp, NULL, NULL, 0, NULL },
                    494:        { "class", roff_line_ignore, NULL, NULL, 0, NULL },
                    495:        { "close", roff_insec, NULL, NULL, 0, NULL },
                    496:        { "CL", roff_unsupp, NULL, NULL, 0, NULL },
                    497:        { "color", roff_line_ignore, NULL, NULL, 0, NULL },
                    498:        { "composite", roff_unsupp, NULL, NULL, 0, NULL },
                    499:        { "continue", roff_unsupp, NULL, NULL, 0, NULL },
                    500:        { "cp", roff_line_ignore, NULL, NULL, 0, NULL },
                    501:        { "cropat", roff_line_ignore, NULL, NULL, 0, NULL },
                    502:        { "cs", roff_line_ignore, NULL, NULL, 0, NULL },
                    503:        { "cu", roff_line_ignore, NULL, NULL, 0, NULL },
                    504:        { "da", roff_unsupp, NULL, NULL, 0, NULL },
                    505:        { "dch", roff_unsupp, NULL, NULL, 0, NULL },
                    506:        { "Dd", roff_Dd, NULL, NULL, 0, NULL },
1.85      kristaps  507:        { "de", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.251     schwarze  508:        { "de1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
                    509:        { "defcolor", roff_line_ignore, NULL, NULL, 0, NULL },
1.85      kristaps  510:        { "dei", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.251     schwarze  511:        { "dei1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
                    512:        { "device", roff_unsupp, NULL, NULL, 0, NULL },
                    513:        { "devicem", roff_unsupp, NULL, NULL, 0, NULL },
                    514:        { "di", roff_unsupp, NULL, NULL, 0, NULL },
                    515:        { "do", roff_unsupp, NULL, NULL, 0, NULL },
1.92      schwarze  516:        { "ds", roff_ds, NULL, NULL, 0, NULL },
1.251     schwarze  517:        { "ds1", roff_ds, NULL, NULL, 0, NULL },
                    518:        { "dwh", roff_unsupp, NULL, NULL, 0, NULL },
                    519:        { "dt", roff_unsupp, NULL, NULL, 0, NULL },
                    520:        { "ec", roff_unsupp, NULL, NULL, 0, NULL },
                    521:        { "ecr", roff_unsupp, NULL, NULL, 0, NULL },
                    522:        { "ecs", roff_unsupp, NULL, NULL, 0, NULL },
1.85      kristaps  523:        { "el", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
1.251     schwarze  524:        { "em", roff_unsupp, NULL, NULL, 0, NULL },
                    525:        { "EN", roff_EN, NULL, NULL, 0, NULL },
                    526:        { "eo", roff_unsupp, NULL, NULL, 0, NULL },
                    527:        { "EP", roff_unsupp, NULL, NULL, 0, NULL },
                    528:        { "EQ", roff_EQ, NULL, NULL, 0, NULL },
                    529:        { "errprint", roff_line_ignore, NULL, NULL, 0, NULL },
                    530:        { "ev", roff_unsupp, NULL, NULL, 0, NULL },
                    531:        { "evc", roff_unsupp, NULL, NULL, 0, NULL },
                    532:        { "ex", roff_unsupp, NULL, NULL, 0, NULL },
                    533:        { "fallback", roff_line_ignore, NULL, NULL, 0, NULL },
1.185     schwarze  534:        { "fam", roff_line_ignore, NULL, NULL, 0, NULL },
1.251     schwarze  535:        { "fc", roff_unsupp, NULL, NULL, 0, NULL },
                    536:        { "fchar", roff_unsupp, NULL, NULL, 0, NULL },
                    537:        { "fcolor", roff_line_ignore, NULL, NULL, 0, NULL },
                    538:        { "fdeferlig", roff_line_ignore, NULL, NULL, 0, NULL },
                    539:        { "feature", roff_line_ignore, NULL, NULL, 0, NULL },
                    540:        { "fkern", roff_line_ignore, NULL, NULL, 0, NULL },
                    541:        { "fl", roff_line_ignore, NULL, NULL, 0, NULL },
                    542:        { "flig", roff_line_ignore, NULL, NULL, 0, NULL },
                    543:        { "fp", roff_line_ignore, NULL, NULL, 0, NULL },
                    544:        { "fps", roff_line_ignore, NULL, NULL, 0, NULL },
                    545:        { "fschar", roff_unsupp, NULL, NULL, 0, NULL },
                    546:        { "fspacewidth", roff_line_ignore, NULL, NULL, 0, NULL },
                    547:        { "fspecial", roff_line_ignore, NULL, NULL, 0, NULL },
                    548:        { "ftr", roff_line_ignore, NULL, NULL, 0, NULL },
                    549:        { "fzoom", roff_line_ignore, NULL, NULL, 0, NULL },
                    550:        { "gcolor", roff_line_ignore, NULL, NULL, 0, NULL },
                    551:        { "hc", roff_line_ignore, NULL, NULL, 0, NULL },
                    552:        { "hcode", roff_line_ignore, NULL, NULL, 0, NULL },
                    553:        { "hidechar", roff_line_ignore, NULL, NULL, 0, NULL },
                    554:        { "hla", roff_line_ignore, NULL, NULL, 0, NULL },
                    555:        { "hlm", roff_line_ignore, NULL, NULL, 0, NULL },
                    556:        { "hpf", roff_line_ignore, NULL, NULL, 0, NULL },
                    557:        { "hpfa", roff_line_ignore, NULL, NULL, 0, NULL },
                    558:        { "hpfcode", roff_line_ignore, NULL, NULL, 0, NULL },
1.186     schwarze  559:        { "hw", roff_line_ignore, NULL, NULL, 0, NULL },
1.103     kristaps  560:        { "hy", roff_line_ignore, NULL, NULL, 0, NULL },
1.251     schwarze  561:        { "hylang", roff_line_ignore, NULL, NULL, 0, NULL },
                    562:        { "hylen", roff_line_ignore, NULL, NULL, 0, NULL },
                    563:        { "hym", roff_line_ignore, NULL, NULL, 0, NULL },
                    564:        { "hypp", roff_line_ignore, NULL, NULL, 0, NULL },
                    565:        { "hys", roff_line_ignore, NULL, NULL, 0, NULL },
1.85      kristaps  566:        { "ie", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
                    567:        { "if", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
                    568:        { "ig", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.251     schwarze  569:        { "index", roff_unsupp, NULL, NULL, 0, NULL },
1.178     schwarze  570:        { "it", roff_it, NULL, NULL, 0, NULL },
1.251     schwarze  571:        { "itc", roff_unsupp, NULL, NULL, 0, NULL },
                    572:        { "IX", roff_line_ignore, NULL, NULL, 0, NULL },
                    573:        { "kern", roff_line_ignore, NULL, NULL, 0, NULL },
                    574:        { "kernafter", roff_line_ignore, NULL, NULL, 0, NULL },
                    575:        { "kernbefore", roff_line_ignore, NULL, NULL, 0, NULL },
                    576:        { "kernpair", roff_line_ignore, NULL, NULL, 0, NULL },
                    577:        { "lc", roff_unsupp, NULL, NULL, 0, NULL },
                    578:        { "lc_ctype", roff_unsupp, NULL, NULL, 0, NULL },
                    579:        { "lds", roff_unsupp, NULL, NULL, 0, NULL },
                    580:        { "length", roff_unsupp, NULL, NULL, 0, NULL },
                    581:        { "letadj", roff_line_ignore, NULL, NULL, 0, NULL },
                    582:        { "lf", roff_insec, NULL, NULL, 0, NULL },
                    583:        { "lg", roff_line_ignore, NULL, NULL, 0, NULL },
                    584:        { "lhang", roff_line_ignore, NULL, NULL, 0, NULL },
                    585:        { "linetabs", roff_unsupp, NULL, NULL, 0, NULL },
                    586:        { "lnr", roff_unsupp, NULL, NULL, 0, NULL },
                    587:        { "lnrf", roff_unsupp, NULL, NULL, 0, NULL },
                    588:        { "lpfx", roff_unsupp, NULL, NULL, 0, NULL },
                    589:        { "ls", roff_line_ignore, NULL, NULL, 0, NULL },
                    590:        { "lsm", roff_unsupp, NULL, NULL, 0, NULL },
                    591:        { "lt", roff_line_ignore, NULL, NULL, 0, NULL },
                    592:        { "mc", roff_line_ignore, NULL, NULL, 0, NULL },
                    593:        { "mediasize", roff_line_ignore, NULL, NULL, 0, NULL },
                    594:        { "minss", roff_line_ignore, NULL, NULL, 0, NULL },
                    595:        { "mk", roff_line_ignore, NULL, NULL, 0, NULL },
                    596:        { "mso", roff_insec, NULL, NULL, 0, NULL },
1.256     schwarze  597:        { "na", roff_line_ignore, NULL, NULL, 0, NULL },
1.103     kristaps  598:        { "ne", roff_line_ignore, NULL, NULL, 0, NULL },
                    599:        { "nh", roff_line_ignore, NULL, NULL, 0, NULL },
1.251     schwarze  600:        { "nhychar", roff_line_ignore, NULL, NULL, 0, NULL },
                    601:        { "nm", roff_unsupp, NULL, NULL, 0, NULL },
                    602:        { "nn", roff_unsupp, NULL, NULL, 0, NULL },
                    603:        { "nop", roff_unsupp, NULL, NULL, 0, NULL },
1.104     kristaps  604:        { "nr", roff_nr, NULL, NULL, 0, NULL },
1.251     schwarze  605:        { "nrf", roff_unsupp, NULL, NULL, 0, NULL },
                    606:        { "nroff", roff_line_ignore, NULL, NULL, 0, NULL },
1.124     schwarze  607:        { "ns", roff_line_ignore, NULL, NULL, 0, NULL },
1.251     schwarze  608:        { "nx", roff_insec, NULL, NULL, 0, NULL },
                    609:        { "open", roff_insec, NULL, NULL, 0, NULL },
                    610:        { "opena", roff_insec, NULL, NULL, 0, NULL },
                    611:        { "os", roff_line_ignore, NULL, NULL, 0, NULL },
                    612:        { "output", roff_unsupp, NULL, NULL, 0, NULL },
                    613:        { "padj", roff_line_ignore, NULL, NULL, 0, NULL },
                    614:        { "papersize", roff_line_ignore, NULL, NULL, 0, NULL },
                    615:        { "pc", roff_line_ignore, NULL, NULL, 0, NULL },
                    616:        { "pev", roff_line_ignore, NULL, NULL, 0, NULL },
                    617:        { "pi", roff_insec, NULL, NULL, 0, NULL },
                    618:        { "PI", roff_unsupp, NULL, NULL, 0, NULL },
1.229     schwarze  619:        { "pl", roff_line_ignore, NULL, NULL, 0, NULL },
1.251     schwarze  620:        { "pm", roff_line_ignore, NULL, NULL, 0, NULL },
                    621:        { "pn", roff_line_ignore, NULL, NULL, 0, NULL },
                    622:        { "pnr", roff_line_ignore, NULL, NULL, 0, NULL },
                    623:        { "po", roff_line_ignore, NULL, NULL, 0, NULL },
1.124     schwarze  624:        { "ps", roff_line_ignore, NULL, NULL, 0, NULL },
1.251     schwarze  625:        { "psbb", roff_unsupp, NULL, NULL, 0, NULL },
1.255     schwarze  626:        { "pshape", roff_unsupp, NULL, NULL, 0, NULL },
1.251     schwarze  627:        { "pso", roff_insec, NULL, NULL, 0, NULL },
                    628:        { "ptr", roff_line_ignore, NULL, NULL, 0, NULL },
                    629:        { "pvs", roff_line_ignore, NULL, NULL, 0, NULL },
                    630:        { "rchar", roff_unsupp, NULL, NULL, 0, NULL },
                    631:        { "rd", roff_line_ignore, NULL, NULL, 0, NULL },
                    632:        { "recursionlimit", roff_line_ignore, NULL, NULL, 0, NULL },
                    633:        { "return", roff_unsupp, NULL, NULL, 0, NULL },
                    634:        { "rfschar", roff_unsupp, NULL, NULL, 0, NULL },
                    635:        { "rhang", roff_line_ignore, NULL, NULL, 0, NULL },
                    636:        { "rj", roff_line_ignore, NULL, NULL, 0, NULL },
1.122     schwarze  637:        { "rm", roff_rm, NULL, NULL, 0, NULL },
1.251     schwarze  638:        { "rn", roff_unsupp, NULL, NULL, 0, NULL },
                    639:        { "rnn", roff_unsupp, NULL, NULL, 0, NULL },
1.203     schwarze  640:        { "rr", roff_rr, NULL, NULL, 0, NULL },
1.251     schwarze  641:        { "rs", roff_line_ignore, NULL, NULL, 0, NULL },
                    642:        { "rt", roff_line_ignore, NULL, NULL, 0, NULL },
                    643:        { "schar", roff_unsupp, NULL, NULL, 0, NULL },
                    644:        { "sentchar", roff_line_ignore, NULL, NULL, 0, NULL },
                    645:        { "shc", roff_line_ignore, NULL, NULL, 0, NULL },
                    646:        { "shift", roff_unsupp, NULL, NULL, 0, NULL },
                    647:        { "sizes", roff_line_ignore, NULL, NULL, 0, NULL },
1.105     kristaps  648:        { "so", roff_so, NULL, NULL, 0, NULL },
1.251     schwarze  649:        { "spacewidth", roff_line_ignore, NULL, NULL, 0, NULL },
                    650:        { "special", roff_line_ignore, NULL, NULL, 0, NULL },
                    651:        { "spreadwarn", roff_line_ignore, NULL, NULL, 0, NULL },
                    652:        { "ss", roff_line_ignore, NULL, NULL, 0, NULL },
                    653:        { "sty", roff_line_ignore, NULL, NULL, 0, NULL },
                    654:        { "substring", roff_unsupp, NULL, NULL, 0, NULL },
                    655:        { "sv", roff_line_ignore, NULL, NULL, 0, NULL },
                    656:        { "sy", roff_insec, NULL, NULL, 0, NULL },
                    657:        { "T&", roff_T_, NULL, NULL, 0, NULL },
1.255     schwarze  658:        { "ta", roff_unsupp, NULL, NULL, 0, NULL },
1.251     schwarze  659:        { "tc", roff_unsupp, NULL, NULL, 0, NULL },
                    660:        { "TE", roff_TE, NULL, NULL, 0, NULL },
                    661:        { "TH", roff_TH, NULL, NULL, 0, NULL },
1.255     schwarze  662:        { "ti", roff_unsupp, NULL, NULL, 0, NULL },
1.251     schwarze  663:        { "tkf", roff_line_ignore, NULL, NULL, 0, NULL },
                    664:        { "tl", roff_unsupp, NULL, NULL, 0, NULL },
                    665:        { "tm", roff_line_ignore, NULL, NULL, 0, NULL },
                    666:        { "tm1", roff_line_ignore, NULL, NULL, 0, NULL },
                    667:        { "tmc", roff_line_ignore, NULL, NULL, 0, NULL },
1.164     kristaps  668:        { "tr", roff_tr, NULL, NULL, 0, NULL },
1.251     schwarze  669:        { "track", roff_line_ignore, NULL, NULL, 0, NULL },
                    670:        { "transchar", roff_line_ignore, NULL, NULL, 0, NULL },
                    671:        { "trf", roff_insec, NULL, NULL, 0, NULL },
                    672:        { "trimat", roff_line_ignore, NULL, NULL, 0, NULL },
                    673:        { "trin", roff_unsupp, NULL, NULL, 0, NULL },
                    674:        { "trnt", roff_unsupp, NULL, NULL, 0, NULL },
                    675:        { "troff", roff_line_ignore, NULL, NULL, 0, NULL },
1.109     kristaps  676:        { "TS", roff_TS, NULL, NULL, 0, NULL },
1.251     schwarze  677:        { "uf", roff_line_ignore, NULL, NULL, 0, NULL },
                    678:        { "ul", roff_line_ignore, NULL, NULL, 0, NULL },
                    679:        { "unformat", roff_unsupp, NULL, NULL, 0, NULL },
                    680:        { "unwatch", roff_line_ignore, NULL, NULL, 0, NULL },
                    681:        { "unwatchn", roff_line_ignore, NULL, NULL, 0, NULL },
                    682:        { "vpt", roff_line_ignore, NULL, NULL, 0, NULL },
                    683:        { "vs", roff_line_ignore, NULL, NULL, 0, NULL },
                    684:        { "warn", roff_line_ignore, NULL, NULL, 0, NULL },
                    685:        { "warnscale", roff_line_ignore, NULL, NULL, 0, NULL },
                    686:        { "watch", roff_line_ignore, NULL, NULL, 0, NULL },
                    687:        { "watchlength", roff_line_ignore, NULL, NULL, 0, NULL },
                    688:        { "watchn", roff_line_ignore, NULL, NULL, 0, NULL },
                    689:        { "wh", roff_unsupp, NULL, NULL, 0, NULL },
                    690:        { "while", roff_unsupp, NULL, NULL, 0, NULL },
                    691:        { "write", roff_insec, NULL, NULL, 0, NULL },
                    692:        { "writec", roff_insec, NULL, NULL, 0, NULL },
                    693:        { "writem", roff_insec, NULL, NULL, 0, NULL },
                    694:        { "xflag", roff_line_ignore, NULL, NULL, 0, NULL },
1.85      kristaps  695:        { ".", roff_cblock, NULL, NULL, 0, NULL },
1.106     kristaps  696:        { NULL, roff_userdef, NULL, NULL, 0, NULL },
1.67      kristaps  697: };
                    698:
1.200     schwarze  699: /* not currently implemented: Ds em Eq LP Me PP pp Or Rd Sf SH */
1.175     schwarze  700: const  char *const __mdoc_reserved[] = {
                    701:        "Ac", "Ad", "An", "Ao", "Ap", "Aq", "Ar", "At",
                    702:        "Bc", "Bd", "Bf", "Bk", "Bl", "Bo", "Bq",
                    703:        "Brc", "Bro", "Brq", "Bsx", "Bt", "Bx",
                    704:        "Cd", "Cm", "Db", "Dc", "Dd", "Dl", "Do", "Dq",
1.200     schwarze  705:        "Dt", "Dv", "Dx", "D1",
                    706:        "Ec", "Ed", "Ef", "Ek", "El", "Em",
                    707:        "En", "Eo", "Er", "Es", "Ev", "Ex",
1.175     schwarze  708:        "Fa", "Fc", "Fd", "Fl", "Fn", "Fo", "Fr", "Ft", "Fx",
1.200     schwarze  709:        "Hf", "Ic", "In", "It", "Lb", "Li", "Lk", "Lp",
                    710:        "Ms", "Mt", "Nd", "Nm", "No", "Ns", "Nx",
1.175     schwarze  711:        "Oc", "Oo", "Op", "Os", "Ot", "Ox",
1.200     schwarze  712:        "Pa", "Pc", "Pf", "Po", "Pp", "Pq",
                    713:        "Qc", "Ql", "Qo", "Qq", "Re", "Rs", "Rv",
                    714:        "Sc", "Sh", "Sm", "So", "Sq",
1.175     schwarze  715:        "Ss", "St", "Sx", "Sy",
                    716:        "Ta", "Tn", "Ud", "Ux", "Va", "Vt", "Xc", "Xo", "Xr",
1.200     schwarze  717:        "%A", "%B", "%C", "%D", "%I", "%J", "%N", "%O",
1.175     schwarze  718:        "%P", "%Q", "%R", "%T", "%U", "%V",
                    719:        NULL
                    720: };
                    721:
1.200     schwarze  722: /* not currently implemented: BT DE DS ME MT PT SY TQ YS */
1.175     schwarze  723: const  char *const __man_reserved[] = {
1.200     schwarze  724:        "AT", "B", "BI", "BR", "DT",
                    725:        "EE", "EN", "EQ", "EX", "HP", "I", "IB", "IP", "IR",
                    726:        "LP", "OP", "P", "PD", "PP",
                    727:        "R", "RB", "RE", "RI", "RS", "SB", "SH", "SM", "SS",
                    728:        "TE", "TH", "TP", "TS", "T&", "UC", "UE", "UR",
1.175     schwarze  729:        NULL
                    730: };
                    731:
1.141     kristaps  732: /* Array of injected predefined strings. */
                    733: #define        PREDEFS_MAX      38
                    734: static const struct predef predefs[PREDEFS_MAX] = {
                    735: #include "predefs.in"
                    736: };
                    737:
1.155     kristaps  738: /* See roffhash_find() */
1.85      kristaps  739: #define        ROFF_HASH(p)    (p[0] - ASCII_LO)
                    740:
1.178     schwarze  741: static int      roffit_lines;  /* number of lines to delay */
                    742: static char    *roffit_macro;  /* nil-terminated macro line */
                    743:
1.207     schwarze  744:
1.266   ! schwarze  745: /* --- request table ------------------------------------------------------ */
        !           746:
1.85      kristaps  747: static void
1.155     kristaps  748: roffhash_init(void)
1.85      kristaps  749: {
                    750:        struct roffmac   *n;
                    751:        int               buc, i;
                    752:
1.106     kristaps  753:        for (i = 0; i < (int)ROFF_USERDEF; i++) {
1.85      kristaps  754:                assert(roffs[i].name[0] >= ASCII_LO);
                    755:                assert(roffs[i].name[0] <= ASCII_HI);
                    756:
                    757:                buc = ROFF_HASH(roffs[i].name);
                    758:
                    759:                if (NULL != (n = hash[buc])) {
                    760:                        for ( ; n->next; n = n->next)
                    761:                                /* Do nothing. */ ;
                    762:                        n->next = &roffs[i];
                    763:                } else
                    764:                        hash[buc] = &roffs[i];
                    765:        }
                    766: }
                    767:
1.67      kristaps  768: /*
                    769:  * Look up a roff token by its name.  Returns ROFF_MAX if no macro by
                    770:  * the nil-terminated string name could be found.
                    771:  */
                    772: static enum rofft
1.155     kristaps  773: roffhash_find(const char *p, size_t s)
1.67      kristaps  774: {
1.85      kristaps  775:        int              buc;
                    776:        struct roffmac  *n;
1.67      kristaps  777:
1.85      kristaps  778:        /*
                    779:         * libroff has an extremely simple hashtable, for the time
                    780:         * being, which simply keys on the first character, which must
                    781:         * be printable, then walks a chain.  It works well enough until
                    782:         * optimised.
                    783:         */
                    784:
                    785:        if (p[0] < ASCII_LO || p[0] > ASCII_HI)
                    786:                return(ROFF_MAX);
                    787:
                    788:        buc = ROFF_HASH(p);
                    789:
                    790:        if (NULL == (n = hash[buc]))
                    791:                return(ROFF_MAX);
                    792:        for ( ; n; n = n->next)
1.106     kristaps  793:                if (0 == strncmp(n->name, p, s) && '\0' == n->name[(int)s])
1.85      kristaps  794:                        return((enum rofft)(n - roffs));
1.67      kristaps  795:
                    796:        return(ROFF_MAX);
                    797: }
                    798:
1.266   ! schwarze  799: /* --- stack of request blocks -------------------------------------------- */
        !           800:
1.67      kristaps  801: /*
                    802:  * Pop the current node off of the stack of roff instructions currently
                    803:  * pending.
                    804:  */
                    805: static void
                    806: roffnode_pop(struct roff *r)
                    807: {
                    808:        struct roffnode *p;
                    809:
1.75      kristaps  810:        assert(r->last);
1.207     schwarze  811:        p = r->last;
1.82      kristaps  812:
1.75      kristaps  813:        r->last = r->last->parent;
1.106     kristaps  814:        free(p->name);
                    815:        free(p->end);
1.67      kristaps  816:        free(p);
                    817: }
                    818:
                    819: /*
                    820:  * Push a roff node onto the instruction stack.  This must later be
                    821:  * removed with roffnode_pop().
                    822:  */
1.98      schwarze  823: static void
1.106     kristaps  824: roffnode_push(struct roff *r, enum rofft tok, const char *name,
                    825:                int line, int col)
1.67      kristaps  826: {
                    827:        struct roffnode *p;
                    828:
1.98      schwarze  829:        p = mandoc_calloc(1, sizeof(struct roffnode));
1.67      kristaps  830:        p->tok = tok;
1.106     kristaps  831:        if (name)
                    832:                p->name = mandoc_strdup(name);
1.67      kristaps  833:        p->parent = r->last;
                    834:        p->line = line;
                    835:        p->col = col;
1.198     schwarze  836:        p->rule = p->parent ? p->parent->rule : 0;
1.67      kristaps  837:
                    838:        r->last = p;
                    839: }
                    840:
1.266   ! schwarze  841: /* --- roff parser state data management ---------------------------------- */
        !           842:
1.67      kristaps  843: static void
                    844: roff_free1(struct roff *r)
                    845: {
1.176     schwarze  846:        struct tbl_node *tbl;
1.125     kristaps  847:        struct eqn_node *e;
1.167     kristaps  848:        int              i;
1.67      kristaps  849:
1.176     schwarze  850:        while (NULL != (tbl = r->first_tbl)) {
                    851:                r->first_tbl = tbl->next;
                    852:                tbl_free(tbl);
1.109     kristaps  853:        }
1.113     kristaps  854:        r->first_tbl = r->last_tbl = r->tbl = NULL;
                    855:
1.125     kristaps  856:        while (NULL != (e = r->first_eqn)) {
                    857:                r->first_eqn = e->next;
                    858:                eqn_free(e);
                    859:        }
                    860:        r->first_eqn = r->last_eqn = r->eqn = NULL;
                    861:
1.67      kristaps  862:        while (r->last)
                    863:                roffnode_pop(r);
1.109     kristaps  864:
1.223     schwarze  865:        free (r->rstack);
                    866:        r->rstack = NULL;
                    867:        r->rstacksz = 0;
                    868:        r->rstackpos = -1;
                    869:
                    870:        roff_freereg(r->regtab);
                    871:        r->regtab = NULL;
                    872:
1.167     kristaps  873:        roff_freestr(r->strtab);
                    874:        roff_freestr(r->xmbtab);
                    875:        r->strtab = r->xmbtab = NULL;
                    876:
                    877:        if (r->xtab)
                    878:                for (i = 0; i < 128; i++)
                    879:                        free(r->xtab[i].p);
                    880:        free(r->xtab);
                    881:        r->xtab = NULL;
1.67      kristaps  882: }
                    883:
                    884: void
                    885: roff_reset(struct roff *r)
                    886: {
                    887:
                    888:        roff_free1(r);
1.227     schwarze  889:        r->format = r->options & (MPARSE_MDOC | MPARSE_MAN);
1.174     kristaps  890:        r->control = 0;
1.67      kristaps  891: }
                    892:
                    893: void
                    894: roff_free(struct roff *r)
                    895: {
                    896:
                    897:        roff_free1(r);
                    898:        free(r);
                    899: }
                    900:
                    901: struct roff *
1.237     schwarze  902: roff_alloc(struct mparse *parse, const struct mchars *mchars, int options)
1.67      kristaps  903: {
                    904:        struct roff     *r;
                    905:
1.98      schwarze  906:        r = mandoc_calloc(1, sizeof(struct roff));
1.128     kristaps  907:        r->parse = parse;
1.237     schwarze  908:        r->mchars = mchars;
1.199     schwarze  909:        r->options = options;
1.227     schwarze  910:        r->format = options & (MPARSE_MDOC | MPARSE_MAN);
1.82      kristaps  911:        r->rstackpos = -1;
1.207     schwarze  912:
1.155     kristaps  913:        roffhash_init();
1.141     kristaps  914:
1.67      kristaps  915:        return(r);
1.265     schwarze  916: }
                    917:
1.266   ! schwarze  918: /* --- syntax tree state data management ---------------------------------- */
        !           919:
1.265     schwarze  920: static void
                    921: roff_man_free1(struct roff_man *man)
                    922: {
                    923:
1.266   ! schwarze  924:        if (man->first != NULL)
        !           925:                roff_node_delete(man, man->first);
1.265     schwarze  926:        free(man->meta.msec);
                    927:        free(man->meta.vol);
                    928:        free(man->meta.os);
                    929:        free(man->meta.arch);
                    930:        free(man->meta.title);
                    931:        free(man->meta.name);
                    932:        free(man->meta.date);
                    933: }
                    934:
                    935: static void
                    936: roff_man_alloc1(struct roff_man *man)
                    937: {
                    938:
                    939:        memset(&man->meta, 0, sizeof(man->meta));
                    940:        man->first = mandoc_calloc(1, sizeof(*man->first));
                    941:        man->first->type = ROFFT_ROOT;
                    942:        man->last = man->first;
                    943:        man->last_es = NULL;
                    944:        man->flags = 0;
                    945:        man->macroset = MACROSET_NONE;
                    946:        man->lastsec = man->lastnamed = SEC_NONE;
                    947:        man->next = ROFF_NEXT_CHILD;
                    948: }
                    949:
                    950: void
                    951: roff_man_reset(struct roff_man *man)
                    952: {
                    953:
                    954:        roff_man_free1(man);
                    955:        roff_man_alloc1(man);
                    956: }
                    957:
                    958: void
                    959: roff_man_free(struct roff_man *man)
                    960: {
                    961:
                    962:        roff_man_free1(man);
                    963:        free(man);
                    964: }
                    965:
                    966: struct roff_man *
                    967: roff_man_alloc(struct roff *roff, struct mparse *parse,
                    968:        const char *defos, int quick)
                    969: {
                    970:        struct roff_man *man;
                    971:
                    972:        man = mandoc_calloc(1, sizeof(*man));
                    973:        man->parse = parse;
                    974:        man->roff = roff;
                    975:        man->defos = defos;
                    976:        man->quick = quick;
                    977:        roff_man_alloc1(man);
                    978:        return(man);
1.67      kristaps  979: }
                    980:
1.266   ! schwarze  981: /* --- syntax tree handling ----------------------------------------------- */
        !           982:
        !           983: struct roff_node *
        !           984: roff_node_alloc(struct roff_man *man, int line, int pos,
        !           985:        enum roff_type type, int tok)
        !           986: {
        !           987:        struct roff_node        *n;
        !           988:
        !           989:        n = mandoc_calloc(1, sizeof(*n));
        !           990:        n->line = line;
        !           991:        n->pos = pos;
        !           992:        n->tok = tok;
        !           993:        n->type = type;
        !           994:        n->sec = man->lastsec;
        !           995:
        !           996:        if (man->flags & MDOC_SYNOPSIS)
        !           997:                n->flags |= MDOC_SYNPRETTY;
        !           998:        else
        !           999:                n->flags &= ~MDOC_SYNPRETTY;
        !          1000:        if (man->flags & MDOC_NEWLINE)
        !          1001:                n->flags |= MDOC_LINE;
        !          1002:        man->flags &= ~MDOC_NEWLINE;
        !          1003:
        !          1004:        return(n);
        !          1005: }
        !          1006:
        !          1007: void
        !          1008: roff_node_append(struct roff_man *man, struct roff_node *n)
        !          1009: {
        !          1010:
        !          1011:        switch (man->next) {
        !          1012:        case ROFF_NEXT_SIBLING:
        !          1013:                man->last->next = n;
        !          1014:                n->prev = man->last;
        !          1015:                n->parent = man->last->parent;
        !          1016:                break;
        !          1017:        case ROFF_NEXT_CHILD:
        !          1018:                man->last->child = n;
        !          1019:                n->parent = man->last;
        !          1020:                break;
        !          1021:        default:
        !          1022:                abort();
        !          1023:                /* NOTREACHED */
        !          1024:        }
        !          1025:        n->parent->nchild++;
        !          1026:
        !          1027:        /*
        !          1028:         * Copy over the normalised-data pointer of our parent.  Not
        !          1029:         * everybody has one, but copying a null pointer is fine.
        !          1030:         */
        !          1031:
        !          1032:        switch (n->type) {
        !          1033:        case ROFFT_BODY:
        !          1034:                if (n->end != ENDBODY_NOT)
        !          1035:                        break;
        !          1036:                /* FALLTHROUGH */
        !          1037:        case ROFFT_TAIL:
        !          1038:                /* FALLTHROUGH */
        !          1039:        case ROFFT_HEAD:
        !          1040:                n->norm = n->parent->norm;
        !          1041:                break;
        !          1042:        default:
        !          1043:                break;
        !          1044:        }
        !          1045:
        !          1046:        if (man->macroset == MACROSET_MDOC)
        !          1047:                mdoc_valid_pre(man, n);
        !          1048:
        !          1049:        switch (n->type) {
        !          1050:        case ROFFT_HEAD:
        !          1051:                assert(n->parent->type == ROFFT_BLOCK);
        !          1052:                n->parent->head = n;
        !          1053:                break;
        !          1054:        case ROFFT_BODY:
        !          1055:                if (n->end)
        !          1056:                        break;
        !          1057:                assert(n->parent->type == ROFFT_BLOCK);
        !          1058:                n->parent->body = n;
        !          1059:                break;
        !          1060:        case ROFFT_TAIL:
        !          1061:                assert(n->parent->type == ROFFT_BLOCK);
        !          1062:                n->parent->tail = n;
        !          1063:                break;
        !          1064:        default:
        !          1065:                break;
        !          1066:        }
        !          1067:        man->last = n;
        !          1068: }
        !          1069:
        !          1070: struct roff_node *
        !          1071: roff_head_alloc(struct roff_man *man, int line, int pos, int tok)
        !          1072: {
        !          1073:        struct roff_node        *n;
        !          1074:
        !          1075:        n = roff_node_alloc(man, line, pos, ROFFT_HEAD, tok);
        !          1076:        roff_node_append(man, n);
        !          1077:        man->next = ROFF_NEXT_CHILD;
        !          1078:        return(n);
        !          1079: }
        !          1080:
        !          1081: struct roff_node *
        !          1082: roff_body_alloc(struct roff_man *man, int line, int pos, int tok)
        !          1083: {
        !          1084:        struct roff_node        *n;
        !          1085:
        !          1086:        n = roff_node_alloc(man, line, pos, ROFFT_BODY, tok);
        !          1087:        roff_node_append(man, n);
        !          1088:        man->next = ROFF_NEXT_CHILD;
        !          1089:        return(n);
        !          1090: }
        !          1091:
        !          1092: void
        !          1093: roff_node_unlink(struct roff_man *man, struct roff_node *n)
        !          1094: {
        !          1095:
        !          1096:        /* Adjust siblings. */
        !          1097:
        !          1098:        if (n->prev)
        !          1099:                n->prev->next = n->next;
        !          1100:        if (n->next)
        !          1101:                n->next->prev = n->prev;
        !          1102:
        !          1103:        /* Adjust parent. */
        !          1104:
        !          1105:        if (n->parent != NULL) {
        !          1106:                n->parent->nchild--;
        !          1107:                if (n->parent->child == n)
        !          1108:                        n->parent->child = n->next;
        !          1109:                if (n->parent->last == n)
        !          1110:                        n->parent->last = n->prev;
        !          1111:        }
        !          1112:
        !          1113:        /* Adjust parse point. */
        !          1114:
        !          1115:        if (man == NULL)
        !          1116:                return;
        !          1117:        if (man->last == n) {
        !          1118:                if (n->prev == NULL) {
        !          1119:                        man->last = n->parent;
        !          1120:                        man->next = ROFF_NEXT_CHILD;
        !          1121:                } else {
        !          1122:                        man->last = n->prev;
        !          1123:                        man->next = ROFF_NEXT_SIBLING;
        !          1124:                }
        !          1125:        }
        !          1126:        if (man->first == n)
        !          1127:                man->first = NULL;
        !          1128: }
        !          1129:
        !          1130: void
        !          1131: roff_node_free(struct roff_node *n)
        !          1132: {
        !          1133:
        !          1134:        if (n->args != NULL)
        !          1135:                mdoc_argv_free(n->args);
        !          1136:        if (n->type == ROFFT_BLOCK || n->type == ROFFT_ELEM)
        !          1137:                free(n->norm);
        !          1138:        free(n->string);
        !          1139:        free(n);
        !          1140: }
        !          1141:
        !          1142: void
        !          1143: roff_node_delete(struct roff_man *man, struct roff_node *n)
        !          1144: {
        !          1145:
        !          1146:        while (n->child != NULL)
        !          1147:                roff_node_delete(man, n->child);
        !          1148:        assert(n->nchild == 0);
        !          1149:        roff_node_unlink(man, n);
        !          1150:        roff_node_free(n);
        !          1151: }
        !          1152:
        !          1153: /* --- main functions of the roff parser ---------------------------------- */
        !          1154:
1.94      kristaps 1155: /*
1.206     schwarze 1156:  * In the current line, expand escape sequences that tend to get
                   1157:  * used in numerical expressions and conditional requests.
                   1158:  * Also check the syntax of the remaining escape sequences.
1.154     kristaps 1159:  */
1.172     schwarze 1160: static enum rofferr
1.238     schwarze 1161: roff_res(struct roff *r, struct buf *buf, int ln, int pos)
1.94      kristaps 1162: {
1.208     schwarze 1163:        char             ubuf[24]; /* buffer to print the number */
1.205     schwarze 1164:        const char      *start; /* start of the string to process */
1.209     schwarze 1165:        char            *stesc; /* start of an escape sequence ('\\') */
1.108     schwarze 1166:        const char      *stnam; /* start of the name, after "[(*" */
                   1167:        const char      *cp;    /* end of the name, e.g. before ']' */
                   1168:        const char      *res;   /* the string to be substituted */
1.238     schwarze 1169:        char            *nbuf;  /* new buffer to copy buf->buf to */
1.181     schwarze 1170:        size_t           maxl;  /* expected length of the escape name */
                   1171:        size_t           naml;  /* actual length of the escape name */
1.237     schwarze 1172:        enum mandoc_esc  esc;   /* type of the escape sequence */
                   1173:        int              inaml; /* length returned from mandoc_escape() */
1.181     schwarze 1174:        int              expand_count;  /* to avoid infinite loops */
1.206     schwarze 1175:        int              npos;  /* position in numeric expression */
1.218     schwarze 1176:        int              arg_complete; /* argument not interrupted by eol */
1.206     schwarze 1177:        char             term;  /* character terminating the escape */
1.94      kristaps 1178:
1.170     schwarze 1179:        expand_count = 0;
1.238     schwarze 1180:        start = buf->buf + pos;
1.205     schwarze 1181:        stesc = strchr(start, '\0') - 1;
                   1182:        while (stesc-- > start) {
1.170     schwarze 1183:
1.205     schwarze 1184:                /* Search backwards for the next backslash. */
                   1185:
1.238     schwarze 1186:                if (*stesc != '\\')
1.205     schwarze 1187:                        continue;
                   1188:
                   1189:                /* If it is escaped, skip it. */
                   1190:
                   1191:                for (cp = stesc - 1; cp >= start; cp--)
1.238     schwarze 1192:                        if (*cp != '\\')
1.205     schwarze 1193:                                break;
                   1194:
1.238     schwarze 1195:                if ((stesc - cp) % 2 == 0) {
1.209     schwarze 1196:                        stesc = (char *)cp;
1.205     schwarze 1197:                        continue;
                   1198:                }
1.108     schwarze 1199:
1.206     schwarze 1200:                /* Decide whether to expand or to check only. */
1.108     schwarze 1201:
1.206     schwarze 1202:                term = '\0';
1.205     schwarze 1203:                cp = stesc + 1;
1.181     schwarze 1204:                switch (*cp) {
1.207     schwarze 1205:                case '*':
1.181     schwarze 1206:                        res = NULL;
                   1207:                        break;
1.207     schwarze 1208:                case 'B':
1.206     schwarze 1209:                        /* FALLTHROUGH */
1.207     schwarze 1210:                case 'w':
1.206     schwarze 1211:                        term = cp[1];
                   1212:                        /* FALLTHROUGH */
1.207     schwarze 1213:                case 'n':
1.181     schwarze 1214:                        res = ubuf;
                   1215:                        break;
                   1216:                default:
1.237     schwarze 1217:                        esc = mandoc_escape(&cp, &stnam, &inaml);
                   1218:                        if (esc == ESCAPE_ERROR ||
                   1219:                            (esc == ESCAPE_SPECIAL &&
                   1220:                             mchars_spec2cp(r->mchars, stnam, inaml) < 0))
1.219     schwarze 1221:                                mandoc_vmsg(MANDOCERR_ESC_BAD,
1.238     schwarze 1222:                                    r->parse, ln, (int)(stesc - buf->buf),
1.219     schwarze 1223:                                    "%.*s", (int)(cp - stesc), stesc);
1.205     schwarze 1224:                        continue;
1.152     kristaps 1225:                }
                   1226:
1.205     schwarze 1227:                if (EXPAND_LIMIT < ++expand_count) {
                   1228:                        mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
1.238     schwarze 1229:                            ln, (int)(stesc - buf->buf), NULL);
1.205     schwarze 1230:                        return(ROFF_IGN);
                   1231:                }
1.108     schwarze 1232:
                   1233:                /*
                   1234:                 * The third character decides the length
1.181     schwarze 1235:                 * of the name of the string or register.
1.108     schwarze 1236:                 * Save a pointer to the name.
                   1237:                 */
                   1238:
1.238     schwarze 1239:                if (term == '\0') {
1.206     schwarze 1240:                        switch (*++cp) {
1.207     schwarze 1241:                        case '\0':
1.206     schwarze 1242:                                maxl = 0;
                   1243:                                break;
1.207     schwarze 1244:                        case '(':
1.206     schwarze 1245:                                cp++;
                   1246:                                maxl = 2;
                   1247:                                break;
1.207     schwarze 1248:                        case '[':
1.206     schwarze 1249:                                cp++;
                   1250:                                term = ']';
                   1251:                                maxl = 0;
                   1252:                                break;
                   1253:                        default:
                   1254:                                maxl = 1;
                   1255:                                break;
                   1256:                        }
                   1257:                } else {
                   1258:                        cp += 2;
1.94      kristaps 1259:                        maxl = 0;
                   1260:                }
1.108     schwarze 1261:                stnam = cp;
1.94      kristaps 1262:
1.108     schwarze 1263:                /* Advance to the end of the name. */
1.94      kristaps 1264:
1.253     schwarze 1265:                naml = 0;
1.218     schwarze 1266:                arg_complete = 1;
1.253     schwarze 1267:                while (maxl == 0 || naml < maxl) {
1.238     schwarze 1268:                        if (*cp == '\0') {
1.219     schwarze 1269:                                mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.238     schwarze 1270:                                    ln, (int)(stesc - buf->buf), stesc);
1.218     schwarze 1271:                                arg_complete = 0;
1.206     schwarze 1272:                                break;
1.153     kristaps 1273:                        }
1.238     schwarze 1274:                        if (maxl == 0 && *cp == term) {
1.206     schwarze 1275:                                cp++;
1.253     schwarze 1276:                                break;
                   1277:                        }
                   1278:                        if (*cp++ != '\\' || stesc[1] != 'w') {
                   1279:                                naml++;
                   1280:                                continue;
                   1281:                        }
                   1282:                        switch (mandoc_escape(&cp, NULL, NULL)) {
                   1283:                        case ESCAPE_SPECIAL:
                   1284:                                /* FALLTHROUGH */
                   1285:                        case ESCAPE_UNICODE:
                   1286:                                /* FALLTHROUGH */
                   1287:                        case ESCAPE_NUMBERED:
                   1288:                                /* FALLTHROUGH */
                   1289:                        case ESCAPE_OVERSTRIKE:
                   1290:                                naml++;
                   1291:                                break;
                   1292:                        default:
1.94      kristaps 1293:                                break;
1.206     schwarze 1294:                        }
1.94      kristaps 1295:                }
                   1296:
1.108     schwarze 1297:                /*
                   1298:                 * Retrieve the replacement string; if it is
                   1299:                 * undefined, resume searching for escapes.
                   1300:                 */
                   1301:
1.206     schwarze 1302:                switch (stesc[1]) {
1.207     schwarze 1303:                case '*':
1.218     schwarze 1304:                        if (arg_complete)
                   1305:                                res = roff_getstrn(r, stnam, naml);
1.206     schwarze 1306:                        break;
1.207     schwarze 1307:                case 'B':
1.206     schwarze 1308:                        npos = 0;
1.218     schwarze 1309:                        ubuf[0] = arg_complete &&
1.261     schwarze 1310:                            roff_evalnum(r, ln, stnam, &npos,
                   1311:                              NULL, ROFFNUM_SCALE) &&
1.218     schwarze 1312:                            stnam + npos + 1 == cp ? '1' : '0';
1.206     schwarze 1313:                        ubuf[1] = '\0';
                   1314:                        break;
1.207     schwarze 1315:                case 'n':
1.218     schwarze 1316:                        if (arg_complete)
                   1317:                                (void)snprintf(ubuf, sizeof(ubuf), "%d",
                   1318:                                    roff_getregn(r, stnam, naml));
                   1319:                        else
                   1320:                                ubuf[0] = '\0';
1.206     schwarze 1321:                        break;
1.207     schwarze 1322:                case 'w':
1.218     schwarze 1323:                        /* use even incomplete args */
1.208     schwarze 1324:                        (void)snprintf(ubuf, sizeof(ubuf), "%d",
1.206     schwarze 1325:                            24 * (int)naml);
                   1326:                        break;
                   1327:                }
1.94      kristaps 1328:
1.238     schwarze 1329:                if (res == NULL) {
1.219     schwarze 1330:                        mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.238     schwarze 1331:                            r->parse, ln, (int)(stesc - buf->buf),
1.219     schwarze 1332:                            "%.*s", (int)naml, stnam);
1.142     kristaps 1333:                        res = "";
1.246     schwarze 1334:                } else if (buf->sz + strlen(res) > SHRT_MAX) {
                   1335:                        mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
                   1336:                            ln, (int)(stesc - buf->buf), NULL);
                   1337:                        return(ROFF_IGN);
1.94      kristaps 1338:                }
                   1339:
1.108     schwarze 1340:                /* Replace the escape sequence by the string. */
                   1341:
1.209     schwarze 1342:                *stesc = '\0';
1.238     schwarze 1343:                buf->sz = mandoc_asprintf(&nbuf, "%s%s%s",
                   1344:                    buf->buf, res, cp) + 1;
1.94      kristaps 1345:
1.205     schwarze 1346:                /* Prepare for the next replacement. */
1.94      kristaps 1347:
1.205     schwarze 1348:                start = nbuf + pos;
1.238     schwarze 1349:                stesc = nbuf + (stesc - buf->buf) + strlen(res);
                   1350:                free(buf->buf);
                   1351:                buf->buf = nbuf;
1.154     kristaps 1352:        }
1.172     schwarze 1353:        return(ROFF_CONT);
1.154     kristaps 1354: }
                   1355:
                   1356: /*
1.178     schwarze 1357:  * Process text streams:
                   1358:  * Convert all breakable hyphens into ASCII_HYPH.
                   1359:  * Decrement and spring input line trap.
1.154     kristaps 1360:  */
                   1361: static enum rofferr
1.238     schwarze 1362: roff_parsetext(struct buf *buf, int pos, int *offs)
1.154     kristaps 1363: {
                   1364:        size_t           sz;
                   1365:        const char      *start;
1.178     schwarze 1366:        char            *p;
                   1367:        int              isz;
1.154     kristaps 1368:        enum mandoc_esc  esc;
                   1369:
1.238     schwarze 1370:        start = p = buf->buf + pos;
1.154     kristaps 1371:
1.238     schwarze 1372:        while (*p != '\0') {
1.154     kristaps 1373:                sz = strcspn(p, "-\\");
                   1374:                p += sz;
                   1375:
1.238     schwarze 1376:                if (*p == '\0')
1.159     kristaps 1377:                        break;
                   1378:
1.238     schwarze 1379:                if (*p == '\\') {
1.154     kristaps 1380:                        /* Skip over escapes. */
                   1381:                        p++;
1.189     schwarze 1382:                        esc = mandoc_escape((const char **)&p, NULL, NULL);
1.238     schwarze 1383:                        if (esc == ESCAPE_ERROR)
1.154     kristaps 1384:                                break;
1.264     schwarze 1385:                        while (*p == '-')
                   1386:                                p++;
1.155     kristaps 1387:                        continue;
1.159     kristaps 1388:                } else if (p == start) {
1.158     kristaps 1389:                        p++;
1.155     kristaps 1390:                        continue;
1.158     kristaps 1391:                }
1.155     kristaps 1392:
1.171     schwarze 1393:                if (isalpha((unsigned char)p[-1]) &&
                   1394:                    isalpha((unsigned char)p[1]))
1.155     kristaps 1395:                        *p = ASCII_HYPH;
                   1396:                p++;
1.94      kristaps 1397:        }
                   1398:
1.178     schwarze 1399:        /* Spring the input line trap. */
1.238     schwarze 1400:        if (roffit_lines == 1) {
                   1401:                isz = mandoc_asprintf(&p, "%s\n.%s", buf->buf, roffit_macro);
                   1402:                free(buf->buf);
                   1403:                buf->buf = p;
                   1404:                buf->sz = isz + 1;
1.178     schwarze 1405:                *offs = 0;
                   1406:                free(roffit_macro);
                   1407:                roffit_lines = 0;
                   1408:                return(ROFF_REPARSE);
1.238     schwarze 1409:        } else if (roffit_lines > 1)
1.178     schwarze 1410:                --roffit_lines;
1.154     kristaps 1411:        return(ROFF_CONT);
1.94      kristaps 1412: }
                   1413:
1.67      kristaps 1414: enum rofferr
1.238     schwarze 1415: roff_parseln(struct roff *r, int ln, struct buf *buf, int *offs)
1.67      kristaps 1416: {
                   1417:        enum rofft       t;
1.109     kristaps 1418:        enum rofferr     e;
1.238     schwarze 1419:        int              pos;   /* parse point */
1.243     schwarze 1420:        int              spos;  /* saved parse point for messages */
1.238     schwarze 1421:        int              ppos;  /* original offset in buf->buf */
                   1422:        int              ctl;   /* macro line (boolean) */
                   1423:
                   1424:        ppos = pos = *offs;
1.79      kristaps 1425:
1.230     schwarze 1426:        /* Handle in-line equation delimiters. */
                   1427:
1.236     schwarze 1428:        if (r->tbl == NULL &&
                   1429:            r->last_eqn != NULL && r->last_eqn->delim &&
1.230     schwarze 1430:            (r->eqn == NULL || r->eqn_inline)) {
1.238     schwarze 1431:                e = roff_eqndelim(r, buf, pos);
1.230     schwarze 1432:                if (e == ROFF_REPARSE)
                   1433:                        return(e);
                   1434:                assert(e == ROFF_CONT);
                   1435:        }
                   1436:
                   1437:        /* Expand some escape sequences. */
1.94      kristaps 1438:
1.238     schwarze 1439:        e = roff_res(r, buf, ln, pos);
                   1440:        if (e == ROFF_IGN)
1.172     schwarze 1441:                return(e);
1.238     schwarze 1442:        assert(e == ROFF_CONT);
1.94      kristaps 1443:
1.238     schwarze 1444:        ctl = roff_getcontrol(r, buf->buf, &pos);
1.130     kristaps 1445:
1.94      kristaps 1446:        /*
1.79      kristaps 1447:         * First, if a scope is open and we're not a macro, pass the
1.252     schwarze 1448:         * text through the macro's filter.
                   1449:         * Equations process all content themselves.
                   1450:         * Tables process almost all content themselves, but we want
                   1451:         * to warn about macros before passing it there.
1.79      kristaps 1452:         */
1.74      kristaps 1453:
1.252     schwarze 1454:        if (r->last != NULL && ! ctl) {
1.78      kristaps 1455:                t = r->last->tok;
                   1456:                assert(roffs[t].text);
1.238     schwarze 1457:                e = (*roffs[t].text)(r, t, buf, ln, pos, pos, offs);
                   1458:                assert(e == ROFF_IGN || e == ROFF_CONT);
                   1459:                if (e != ROFF_CONT)
1.125     kristaps 1460:                        return(e);
1.182     schwarze 1461:        }
1.252     schwarze 1462:        if (r->eqn != NULL)
1.238     schwarze 1463:                return(eqn_read(&r->eqn, ln, buf->buf, ppos, offs));
1.252     schwarze 1464:        if (r->tbl != NULL && ( ! ctl || buf->buf[pos] == '\0'))
1.259     schwarze 1465:                return(tbl_read(r->tbl, ln, buf->buf, ppos));
1.252     schwarze 1466:        if ( ! ctl)
1.238     schwarze 1467:                return(roff_parsetext(buf, pos, offs));
1.228     schwarze 1468:
                   1469:        /* Skip empty request lines. */
                   1470:
1.238     schwarze 1471:        if (buf->buf[pos] == '"') {
1.228     schwarze 1472:                mandoc_msg(MANDOCERR_COMMENT_BAD, r->parse,
                   1473:                    ln, pos, NULL);
                   1474:                return(ROFF_IGN);
1.238     schwarze 1475:        } else if (buf->buf[pos] == '\0')
1.228     schwarze 1476:                return(ROFF_IGN);
1.67      kristaps 1477:
1.79      kristaps 1478:        /*
                   1479:         * If a scope is open, go to the child handler for that macro,
                   1480:         * as it may want to preprocess before doing anything with it.
1.125     kristaps 1481:         * Don't do so if an equation is open.
1.79      kristaps 1482:         */
1.78      kristaps 1483:
1.79      kristaps 1484:        if (r->last) {
                   1485:                t = r->last->tok;
                   1486:                assert(roffs[t].sub);
1.238     schwarze 1487:                return((*roffs[t].sub)(r, t, buf, ln, ppos, pos, offs));
1.79      kristaps 1488:        }
1.78      kristaps 1489:
1.243     schwarze 1490:        /* No scope is open.  This is a new request or macro. */
                   1491:
                   1492:        spos = pos;
                   1493:        t = roff_parse(r, buf->buf, &pos, ln, ppos);
                   1494:
                   1495:        /* Tables ignore most macros. */
                   1496:
                   1497:        if (r->tbl != NULL && (t == ROFF_MAX || t == ROFF_TS)) {
                   1498:                mandoc_msg(MANDOCERR_TBLMACRO, r->parse,
                   1499:                    ln, pos, buf->buf + spos);
1.257     schwarze 1500:                if (t == ROFF_TS)
                   1501:                        return(ROFF_IGN);
                   1502:                while (buf->buf[pos] != '\0' && buf->buf[pos] != ' ')
                   1503:                        pos++;
                   1504:                while (buf->buf[pos] != '\0' && buf->buf[pos] == ' ')
                   1505:                        pos++;
                   1506:                return(tbl_read(r->tbl, ln, buf->buf, pos));
1.243     schwarze 1507:        }
                   1508:
1.79      kristaps 1509:        /*
1.243     schwarze 1510:         * This is neither a roff request nor a user-defined macro.
                   1511:         * Let the standard macro set parsers handle it.
1.79      kristaps 1512:         */
1.67      kristaps 1513:
1.243     schwarze 1514:        if (t == ROFF_MAX)
1.79      kristaps 1515:                return(ROFF_CONT);
1.243     schwarze 1516:
                   1517:        /* Execute a roff request or a user defined macro. */
1.67      kristaps 1518:
1.75      kristaps 1519:        assert(roffs[t].proc);
1.238     schwarze 1520:        return((*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs));
1.74      kristaps 1521: }
                   1522:
1.117     kristaps 1523: void
1.74      kristaps 1524: roff_endparse(struct roff *r)
                   1525: {
                   1526:
1.110     kristaps 1527:        if (r->last)
1.221     schwarze 1528:                mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
                   1529:                    r->last->line, r->last->col,
                   1530:                    roffs[r->last->tok].name);
1.117     kristaps 1531:
1.125     kristaps 1532:        if (r->eqn) {
1.221     schwarze 1533:                mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
                   1534:                    r->eqn->eqn.ln, r->eqn->eqn.pos, "EQ");
1.151     kristaps 1535:                eqn_end(&r->eqn);
1.125     kristaps 1536:        }
                   1537:
1.117     kristaps 1538:        if (r->tbl) {
1.221     schwarze 1539:                mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
                   1540:                    r->tbl->line, r->tbl->pos, "TS");
1.151     kristaps 1541:                tbl_end(&r->tbl);
1.117     kristaps 1542:        }
1.67      kristaps 1543: }
                   1544:
                   1545: /*
                   1546:  * Parse a roff node's type from the input buffer.  This must be in the
                   1547:  * form of ".foo xxx" in the usual way.
                   1548:  */
                   1549: static enum rofft
1.214     schwarze 1550: roff_parse(struct roff *r, char *buf, int *pos, int ln, int ppos)
1.67      kristaps 1551: {
1.214     schwarze 1552:        char            *cp;
1.106     kristaps 1553:        const char      *mac;
                   1554:        size_t           maclen;
1.67      kristaps 1555:        enum rofft       t;
                   1556:
1.214     schwarze 1557:        cp = buf + *pos;
                   1558:
                   1559:        if ('\0' == *cp || '"' == *cp || '\t' == *cp || ' ' == *cp)
1.67      kristaps 1560:                return(ROFF_MAX);
                   1561:
1.214     schwarze 1562:        mac = cp;
                   1563:        maclen = roff_getname(r, &cp, ln, ppos);
1.67      kristaps 1564:
1.106     kristaps 1565:        t = (r->current_string = roff_getstrn(r, mac, maclen))
1.155     kristaps 1566:            ? ROFF_USERDEF : roffhash_find(mac, maclen);
1.67      kristaps 1567:
1.214     schwarze 1568:        if (ROFF_MAX != t)
                   1569:                *pos = cp - buf;
1.67      kristaps 1570:
                   1571:        return(t);
                   1572: }
                   1573:
1.266   ! schwarze 1574: /* --- handling of request blocks ----------------------------------------- */
        !          1575:
1.67      kristaps 1576: static enum rofferr
1.76      kristaps 1577: roff_cblock(ROFF_ARGS)
1.67      kristaps 1578: {
                   1579:
1.79      kristaps 1580:        /*
                   1581:         * A block-close `..' should only be invoked as a child of an
                   1582:         * ignore macro, otherwise raise a warning and just ignore it.
                   1583:         */
                   1584:
1.238     schwarze 1585:        if (r->last == NULL) {
1.221     schwarze 1586:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1587:                    ln, ppos, "..");
1.76      kristaps 1588:                return(ROFF_IGN);
                   1589:        }
1.67      kristaps 1590:
1.81      kristaps 1591:        switch (r->last->tok) {
1.207     schwarze 1592:        case ROFF_am:
1.220     schwarze 1593:                /* ROFF_am1 is remapped to ROFF_am in roff_block(). */
1.81      kristaps 1594:                /* FALLTHROUGH */
1.207     schwarze 1595:        case ROFF_ami:
1.81      kristaps 1596:                /* FALLTHROUGH */
1.207     schwarze 1597:        case ROFF_de:
1.108     schwarze 1598:                /* ROFF_de1 is remapped to ROFF_de in roff_block(). */
1.81      kristaps 1599:                /* FALLTHROUGH */
1.207     schwarze 1600:        case ROFF_dei:
1.81      kristaps 1601:                /* FALLTHROUGH */
1.207     schwarze 1602:        case ROFF_ig:
1.81      kristaps 1603:                break;
                   1604:        default:
1.221     schwarze 1605:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1606:                    ln, ppos, "..");
1.67      kristaps 1607:                return(ROFF_IGN);
1.76      kristaps 1608:        }
1.67      kristaps 1609:
1.238     schwarze 1610:        if (buf->buf[pos] != '\0')
1.217     schwarze 1611:                mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
1.238     schwarze 1612:                    ".. %s", buf->buf + pos);
1.71      kristaps 1613:
                   1614:        roffnode_pop(r);
1.76      kristaps 1615:        roffnode_cleanscope(r);
                   1616:        return(ROFF_IGN);
1.71      kristaps 1617:
1.67      kristaps 1618: }
                   1619:
1.76      kristaps 1620: static void
                   1621: roffnode_cleanscope(struct roff *r)
1.67      kristaps 1622: {
                   1623:
1.76      kristaps 1624:        while (r->last) {
1.173     schwarze 1625:                if (--r->last->endspan != 0)
1.76      kristaps 1626:                        break;
                   1627:                roffnode_pop(r);
                   1628:        }
1.67      kristaps 1629: }
                   1630:
1.195     schwarze 1631: static void
                   1632: roff_ccond(struct roff *r, int ln, int ppos)
1.74      kristaps 1633: {
                   1634:
1.76      kristaps 1635:        if (NULL == r->last) {
1.221     schwarze 1636:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1637:                    ln, ppos, "\\}");
1.195     schwarze 1638:                return;
1.76      kristaps 1639:        }
                   1640:
1.82      kristaps 1641:        switch (r->last->tok) {
1.207     schwarze 1642:        case ROFF_el:
1.82      kristaps 1643:                /* FALLTHROUGH */
1.207     schwarze 1644:        case ROFF_ie:
1.82      kristaps 1645:                /* FALLTHROUGH */
1.207     schwarze 1646:        case ROFF_if:
1.82      kristaps 1647:                break;
                   1648:        default:
1.221     schwarze 1649:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1650:                    ln, ppos, "\\}");
1.195     schwarze 1651:                return;
1.75      kristaps 1652:        }
                   1653:
1.76      kristaps 1654:        if (r->last->endspan > -1) {
1.221     schwarze 1655:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1656:                    ln, ppos, "\\}");
1.195     schwarze 1657:                return;
1.76      kristaps 1658:        }
                   1659:
1.75      kristaps 1660:        roffnode_pop(r);
1.76      kristaps 1661:        roffnode_cleanscope(r);
1.195     schwarze 1662:        return;
1.76      kristaps 1663: }
                   1664:
                   1665: static enum rofferr
1.80      kristaps 1666: roff_block(ROFF_ARGS)
1.76      kristaps 1667: {
1.220     schwarze 1668:        const char      *name;
                   1669:        char            *iname, *cp;
1.213     schwarze 1670:        size_t           namesz;
1.106     kristaps 1671:
1.220     schwarze 1672:        /* Ignore groff compatibility mode for now. */
1.76      kristaps 1673:
1.238     schwarze 1674:        if (tok == ROFF_de1)
1.220     schwarze 1675:                tok = ROFF_de;
1.251     schwarze 1676:        else if (tok == ROFF_dei1)
                   1677:                tok = ROFF_dei;
1.238     schwarze 1678:        else if (tok == ROFF_am1)
1.220     schwarze 1679:                tok = ROFF_am;
1.251     schwarze 1680:        else if (tok == ROFF_ami1)
                   1681:                tok = ROFF_ami;
1.220     schwarze 1682:
                   1683:        /* Parse the macro name argument. */
                   1684:
1.238     schwarze 1685:        cp = buf->buf + pos;
                   1686:        if (tok == ROFF_ig) {
1.220     schwarze 1687:                iname = NULL;
                   1688:                namesz = 0;
                   1689:        } else {
                   1690:                iname = cp;
                   1691:                namesz = roff_getname(r, &cp, ln, ppos);
                   1692:                iname[namesz] = '\0';
                   1693:        }
1.107     kristaps 1694:
1.220     schwarze 1695:        /* Resolve the macro name argument if it is indirect. */
1.107     kristaps 1696:
1.238     schwarze 1697:        if (namesz && (tok == ROFF_dei || tok == ROFF_ami)) {
                   1698:                if ((name = roff_getstrn(r, iname, namesz)) == NULL) {
1.220     schwarze 1699:                        mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.238     schwarze 1700:                            r->parse, ln, (int)(iname - buf->buf),
1.220     schwarze 1701:                            "%.*s", (int)namesz, iname);
                   1702:                        namesz = 0;
                   1703:                } else
                   1704:                        namesz = strlen(name);
                   1705:        } else
                   1706:                name = iname;
1.107     kristaps 1707:
1.238     schwarze 1708:        if (namesz == 0 && tok != ROFF_ig) {
1.220     schwarze 1709:                mandoc_msg(MANDOCERR_REQ_EMPTY, r->parse,
                   1710:                    ln, ppos, roffs[tok].name);
                   1711:                return(ROFF_IGN);
                   1712:        }
1.80      kristaps 1713:
1.106     kristaps 1714:        roffnode_push(r, tok, name, ln, ppos);
                   1715:
                   1716:        /*
                   1717:         * At the beginning of a `de' macro, clear the existing string
                   1718:         * with the same name, if there is one.  New content will be
1.193     schwarze 1719:         * appended from roff_block_text() in multiline mode.
1.106     kristaps 1720:         */
1.107     kristaps 1721:
1.238     schwarze 1722:        if (tok == ROFF_de || tok == ROFF_dei)
1.213     schwarze 1723:                roff_setstrn(&r->strtab, name, namesz, "", 0, 0);
1.76      kristaps 1724:
1.238     schwarze 1725:        if (*cp == '\0')
1.78      kristaps 1726:                return(ROFF_IGN);
                   1727:
1.220     schwarze 1728:        /* Get the custom end marker. */
1.107     kristaps 1729:
1.220     schwarze 1730:        iname = cp;
1.213     schwarze 1731:        namesz = roff_getname(r, &cp, ln, ppos);
1.220     schwarze 1732:
                   1733:        /* Resolve the end marker if it is indirect. */
                   1734:
1.238     schwarze 1735:        if (namesz && (tok == ROFF_dei || tok == ROFF_ami)) {
                   1736:                if ((name = roff_getstrn(r, iname, namesz)) == NULL) {
1.220     schwarze 1737:                        mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.238     schwarze 1738:                            r->parse, ln, (int)(iname - buf->buf),
1.220     schwarze 1739:                            "%.*s", (int)namesz, iname);
                   1740:                        namesz = 0;
                   1741:                } else
                   1742:                        namesz = strlen(name);
                   1743:        } else
                   1744:                name = iname;
                   1745:
1.213     schwarze 1746:        if (namesz)
                   1747:                r->last->end = mandoc_strndup(name, namesz);
1.78      kristaps 1748:
1.238     schwarze 1749:        if (*cp != '\0')
1.217     schwarze 1750:                mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse,
                   1751:                    ln, pos, ".%s ... %s", roffs[tok].name, cp);
1.74      kristaps 1752:
1.78      kristaps 1753:        return(ROFF_IGN);
                   1754: }
                   1755:
                   1756: static enum rofferr
1.80      kristaps 1757: roff_block_sub(ROFF_ARGS)
1.79      kristaps 1758: {
                   1759:        enum rofft      t;
                   1760:        int             i, j;
                   1761:
                   1762:        /*
                   1763:         * First check whether a custom macro exists at this level.  If
                   1764:         * it does, then check against it.  This is some of groff's
                   1765:         * stranger behaviours.  If we encountered a custom end-scope
                   1766:         * tag and that tag also happens to be a "real" macro, then we
                   1767:         * need to try interpreting it again as a real macro.  If it's
                   1768:         * not, then return ignore.  Else continue.
                   1769:         */
                   1770:
                   1771:        if (r->last->end) {
1.130     kristaps 1772:                for (i = pos, j = 0; r->last->end[j]; j++, i++)
1.238     schwarze 1773:                        if (buf->buf[i] != r->last->end[j])
1.79      kristaps 1774:                                break;
                   1775:
1.238     schwarze 1776:                if (r->last->end[j] == '\0' &&
                   1777:                    (buf->buf[i] == '\0' ||
                   1778:                     buf->buf[i] == ' ' ||
                   1779:                     buf->buf[i] == '\t')) {
1.79      kristaps 1780:                        roffnode_pop(r);
                   1781:                        roffnode_cleanscope(r);
                   1782:
1.238     schwarze 1783:                        while (buf->buf[i] == ' ' || buf->buf[i] == '\t')
1.130     kristaps 1784:                                i++;
                   1785:
                   1786:                        pos = i;
1.238     schwarze 1787:                        if (roff_parse(r, buf->buf, &pos, ln, ppos) !=
                   1788:                            ROFF_MAX)
1.79      kristaps 1789:                                return(ROFF_RERUN);
                   1790:                        return(ROFF_IGN);
                   1791:                }
                   1792:        }
                   1793:
                   1794:        /*
                   1795:         * If we have no custom end-query or lookup failed, then try
                   1796:         * pulling it out of the hashtable.
                   1797:         */
                   1798:
1.238     schwarze 1799:        t = roff_parse(r, buf->buf, &pos, ln, ppos);
1.79      kristaps 1800:
1.238     schwarze 1801:        if (t != ROFF_cblock) {
                   1802:                if (tok != ROFF_ig)
                   1803:                        roff_setstr(r, r->last->name, buf->buf + ppos, 2);
1.79      kristaps 1804:                return(ROFF_IGN);
1.106     kristaps 1805:        }
1.79      kristaps 1806:
                   1807:        assert(roffs[t].proc);
1.238     schwarze 1808:        return((*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs));
1.79      kristaps 1809: }
                   1810:
                   1811: static enum rofferr
1.80      kristaps 1812: roff_block_text(ROFF_ARGS)
1.78      kristaps 1813: {
                   1814:
1.238     schwarze 1815:        if (tok != ROFF_ig)
                   1816:                roff_setstr(r, r->last->name, buf->buf + pos, 2);
1.106     kristaps 1817:
1.78      kristaps 1818:        return(ROFF_IGN);
                   1819: }
                   1820:
                   1821: static enum rofferr
1.82      kristaps 1822: roff_cond_sub(ROFF_ARGS)
                   1823: {
                   1824:        enum rofft       t;
1.139     kristaps 1825:        char            *ep;
1.198     schwarze 1826:        int              rr;
1.82      kristaps 1827:
                   1828:        rr = r->last->rule;
1.139     kristaps 1829:        roffnode_cleanscope(r);
1.238     schwarze 1830:        t = roff_parse(r, buf->buf, &pos, ln, ppos);
1.82      kristaps 1831:
1.139     kristaps 1832:        /*
1.177     schwarze 1833:         * Fully handle known macros when they are structurally
                   1834:         * required or when the conditional evaluated to true.
1.87      kristaps 1835:         */
                   1836:
1.238     schwarze 1837:        if ((t != ROFF_MAX) &&
                   1838:            (rr || roffs[t].flags & ROFFMAC_STRUCT)) {
1.177     schwarze 1839:                assert(roffs[t].proc);
1.238     schwarze 1840:                return((*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs));
1.177     schwarze 1841:        }
1.144     kristaps 1842:
1.196     schwarze 1843:        /*
                   1844:         * If `\}' occurs on a macro line without a preceding macro,
                   1845:         * drop the line completely.
                   1846:         */
                   1847:
1.238     schwarze 1848:        ep = buf->buf + pos;
                   1849:        if (ep[0] == '\\' && ep[1] == '}')
1.198     schwarze 1850:                rr = 0;
1.196     schwarze 1851:
1.177     schwarze 1852:        /* Always check for the closing delimiter `\}'. */
1.144     kristaps 1853:
1.238     schwarze 1854:        while ((ep = strchr(ep, '\\')) != NULL) {
                   1855:                if (*(++ep) == '}') {
1.197     schwarze 1856:                        *ep = '&';
1.238     schwarze 1857:                        roff_ccond(r, ln, ep - buf->buf - 1);
1.197     schwarze 1858:                }
1.247     schwarze 1859:                if (*ep != '\0')
                   1860:                        ++ep;
1.177     schwarze 1861:        }
1.198     schwarze 1862:        return(rr ? ROFF_CONT : ROFF_IGN);
1.82      kristaps 1863: }
                   1864:
                   1865: static enum rofferr
                   1866: roff_cond_text(ROFF_ARGS)
1.78      kristaps 1867: {
1.140     kristaps 1868:        char            *ep;
1.198     schwarze 1869:        int              rr;
1.82      kristaps 1870:
                   1871:        rr = r->last->rule;
1.140     kristaps 1872:        roffnode_cleanscope(r);
1.82      kristaps 1873:
1.238     schwarze 1874:        ep = buf->buf + pos;
                   1875:        while ((ep = strchr(ep, '\\')) != NULL) {
                   1876:                if (*(++ep) == '}') {
1.197     schwarze 1877:                        *ep = '&';
1.238     schwarze 1878:                        roff_ccond(r, ln, ep - buf->buf - 1);
1.197     schwarze 1879:                }
1.247     schwarze 1880:                if (*ep != '\0')
                   1881:                        ++ep;
1.78      kristaps 1882:        }
1.198     schwarze 1883:        return(rr ? ROFF_CONT : ROFF_IGN);
1.74      kristaps 1884: }
                   1885:
1.266   ! schwarze 1886: /* --- handling of numeric and conditional expressions -------------------- */
        !          1887:
1.204     schwarze 1888: /*
                   1889:  * Parse a single signed integer number.  Stop at the first non-digit.
                   1890:  * If there is at least one digit, return success and advance the
                   1891:  * parse point, else return failure and let the parse point unchanged.
                   1892:  * Ignore overflows, treat them just like the C language.
                   1893:  */
1.184     schwarze 1894: static int
1.261     schwarze 1895: roff_getnum(const char *v, int *pos, int *res, int flags)
1.184     schwarze 1896: {
1.261     schwarze 1897:        int      myres, scaled, n, p;
1.206     schwarze 1898:
                   1899:        if (NULL == res)
                   1900:                res = &myres;
1.184     schwarze 1901:
                   1902:        p = *pos;
                   1903:        n = v[p] == '-';
1.261     schwarze 1904:        if (n || v[p] == '+')
1.184     schwarze 1905:                p++;
                   1906:
1.261     schwarze 1907:        if (flags & ROFFNUM_WHITE)
                   1908:                while (isspace((unsigned char)v[p]))
                   1909:                        p++;
                   1910:
1.184     schwarze 1911:        for (*res = 0; isdigit((unsigned char)v[p]); p++)
1.204     schwarze 1912:                *res = 10 * *res + v[p] - '0';
1.184     schwarze 1913:        if (p == *pos + n)
                   1914:                return 0;
                   1915:
                   1916:        if (n)
                   1917:                *res = -*res;
                   1918:
1.254     schwarze 1919:        /* Each number may be followed by one optional scaling unit. */
                   1920:
                   1921:        switch (v[p]) {
                   1922:        case 'f':
1.261     schwarze 1923:                scaled = *res * 65536;
1.254     schwarze 1924:                break;
                   1925:        case 'i':
1.261     schwarze 1926:                scaled = *res * 240;
1.254     schwarze 1927:                break;
                   1928:        case 'c':
1.261     schwarze 1929:                scaled = *res * 240 / 2.54;
1.254     schwarze 1930:                break;
                   1931:        case 'v':
                   1932:                /* FALLTROUGH */
                   1933:        case 'P':
1.261     schwarze 1934:                scaled = *res * 40;
1.254     schwarze 1935:                break;
                   1936:        case 'm':
                   1937:                /* FALLTROUGH */
                   1938:        case 'n':
1.261     schwarze 1939:                scaled = *res * 24;
1.254     schwarze 1940:                break;
                   1941:        case 'p':
1.261     schwarze 1942:                scaled = *res * 10 / 3;
1.254     schwarze 1943:                break;
                   1944:        case 'u':
1.261     schwarze 1945:                scaled = *res;
1.254     schwarze 1946:                break;
                   1947:        case 'M':
1.261     schwarze 1948:                scaled = *res * 6 / 25;
1.254     schwarze 1949:                break;
                   1950:        default:
1.261     schwarze 1951:                scaled = *res;
1.254     schwarze 1952:                p--;
                   1953:                break;
                   1954:        }
1.261     schwarze 1955:        if (flags & ROFFNUM_SCALE)
                   1956:                *res = scaled;
1.254     schwarze 1957:
                   1958:        *pos = p + 1;
                   1959:        return(1);
1.184     schwarze 1960: }
                   1961:
1.198     schwarze 1962: /*
                   1963:  * Evaluate a string comparison condition.
                   1964:  * The first character is the delimiter.
                   1965:  * Succeed if the string up to its second occurrence
                   1966:  * matches the string up to its third occurence.
                   1967:  * Advance the cursor after the third occurrence
                   1968:  * or lacking that, to the end of the line.
                   1969:  */
                   1970: static int
                   1971: roff_evalstrcond(const char *v, int *pos)
                   1972: {
                   1973:        const char      *s1, *s2, *s3;
                   1974:        int              match;
                   1975:
                   1976:        match = 0;
                   1977:        s1 = v + *pos;          /* initial delimiter */
                   1978:        s2 = s1 + 1;            /* for scanning the first string */
                   1979:        s3 = strchr(s2, *s1);   /* for scanning the second string */
                   1980:
                   1981:        if (NULL == s3)         /* found no middle delimiter */
                   1982:                goto out;
                   1983:
                   1984:        while ('\0' != *++s3) {
                   1985:                if (*s2 != *s3) {  /* mismatch */
                   1986:                        s3 = strchr(s3, *s1);
                   1987:                        break;
                   1988:                }
                   1989:                if (*s3 == *s1) {  /* found the final delimiter */
                   1990:                        match = 1;
                   1991:                        break;
                   1992:                }
                   1993:                s2++;
                   1994:        }
                   1995:
                   1996: out:
                   1997:        if (NULL == s3)
                   1998:                s3 = strchr(s2, '\0');
1.242     schwarze 1999:        else if (*s3 != '\0')
1.198     schwarze 2000:                s3++;
                   2001:        *pos = s3 - v;
                   2002:        return(match);
                   2003: }
                   2004:
1.204     schwarze 2005: /*
                   2006:  * Evaluate an optionally negated single character, numerical,
                   2007:  * or string condition.
                   2008:  */
1.198     schwarze 2009: static int
1.234     kristaps 2010: roff_evalcond(struct roff *r, int ln, const char *v, int *pos)
1.88      kristaps 2011: {
1.241     schwarze 2012:        int      number, savepos, wanttrue;
1.88      kristaps 2013:
1.198     schwarze 2014:        if ('!' == v[*pos]) {
                   2015:                wanttrue = 0;
                   2016:                (*pos)++;
                   2017:        } else
                   2018:                wanttrue = 1;
                   2019:
1.88      kristaps 2020:        switch (v[*pos]) {
1.240     schwarze 2021:        case '\0':
                   2022:                return(0);
1.207     schwarze 2023:        case 'n':
1.198     schwarze 2024:                /* FALLTHROUGH */
1.207     schwarze 2025:        case 'o':
1.88      kristaps 2026:                (*pos)++;
1.198     schwarze 2027:                return(wanttrue);
1.207     schwarze 2028:        case 'c':
1.198     schwarze 2029:                /* FALLTHROUGH */
1.207     schwarze 2030:        case 'd':
1.198     schwarze 2031:                /* FALLTHROUGH */
1.207     schwarze 2032:        case 'e':
1.88      kristaps 2033:                /* FALLTHROUGH */
1.207     schwarze 2034:        case 'r':
1.88      kristaps 2035:                /* FALLTHROUGH */
1.207     schwarze 2036:        case 't':
1.239     schwarze 2037:                /* FALLTHROUGH */
                   2038:        case 'v':
1.88      kristaps 2039:                (*pos)++;
1.198     schwarze 2040:                return(!wanttrue);
1.88      kristaps 2041:        default:
                   2042:                break;
                   2043:        }
                   2044:
1.241     schwarze 2045:        savepos = *pos;
1.261     schwarze 2046:        if (roff_evalnum(r, ln, v, pos, &number, ROFFNUM_SCALE))
1.204     schwarze 2047:                return((number > 0) == wanttrue);
1.241     schwarze 2048:        else if (*pos == savepos)
                   2049:                return(roff_evalstrcond(v, pos) == wanttrue);
1.204     schwarze 2050:        else
1.241     schwarze 2051:                return (0);
1.88      kristaps 2052: }
                   2053:
1.74      kristaps 2054: static enum rofferr
1.103     kristaps 2055: roff_line_ignore(ROFF_ARGS)
1.89      kristaps 2056: {
1.123     schwarze 2057:
1.89      kristaps 2058:        return(ROFF_IGN);
                   2059: }
                   2060:
1.104     kristaps 2061: static enum rofferr
1.251     schwarze 2062: roff_insec(ROFF_ARGS)
                   2063: {
                   2064:
                   2065:        mandoc_msg(MANDOCERR_REQ_INSEC, r->parse,
                   2066:            ln, ppos, roffs[tok].name);
                   2067:        return(ROFF_IGN);
                   2068: }
                   2069:
                   2070: static enum rofferr
                   2071: roff_unsupp(ROFF_ARGS)
                   2072: {
                   2073:
                   2074:        mandoc_msg(MANDOCERR_REQ_UNSUPP, r->parse,
                   2075:            ln, ppos, roffs[tok].name);
                   2076:        return(ROFF_IGN);
                   2077: }
                   2078:
                   2079: static enum rofferr
1.82      kristaps 2080: roff_cond(ROFF_ARGS)
1.74      kristaps 2081: {
1.173     schwarze 2082:
                   2083:        roffnode_push(r, tok, NULL, ln, ppos);
1.74      kristaps 2084:
1.207     schwarze 2085:        /*
1.134     kristaps 2086:         * An `.el' has no conditional body: it will consume the value
                   2087:         * of the current rstack entry set in prior `ie' calls or
1.207     schwarze 2088:         * defaults to DENY.
1.134     kristaps 2089:         *
                   2090:         * If we're not an `el', however, then evaluate the conditional.
                   2091:         */
1.133     kristaps 2092:
1.238     schwarze 2093:        r->last->rule = tok == ROFF_el ?
1.207     schwarze 2094:            (r->rstackpos < 0 ? 0 : r->rstack[r->rstackpos--]) :
1.238     schwarze 2095:            roff_evalcond(r, ln, buf->buf, &pos);
1.77      kristaps 2096:
1.134     kristaps 2097:        /*
                   2098:         * An if-else will put the NEGATION of the current evaluated
                   2099:         * conditional into the stack of rules.
                   2100:         */
                   2101:
1.238     schwarze 2102:        if (tok == ROFF_ie) {
1.223     schwarze 2103:                if (r->rstackpos + 1 == r->rstacksz) {
                   2104:                        r->rstacksz += 16;
                   2105:                        r->rstack = mandoc_reallocarray(r->rstack,
                   2106:                            r->rstacksz, sizeof(int));
1.134     kristaps 2107:                }
1.198     schwarze 2108:                r->rstack[++r->rstackpos] = !r->last->rule;
1.82      kristaps 2109:        }
1.88      kristaps 2110:
                   2111:        /* If the parent has false as its rule, then so do we. */
                   2112:
1.198     schwarze 2113:        if (r->last->parent && !r->last->parent->rule)
                   2114:                r->last->rule = 0;
1.88      kristaps 2115:
                   2116:        /*
1.173     schwarze 2117:         * Determine scope.
                   2118:         * If there is nothing on the line after the conditional,
                   2119:         * not even whitespace, use next-line scope.
1.88      kristaps 2120:         */
1.74      kristaps 2121:
1.238     schwarze 2122:        if (buf->buf[pos] == '\0') {
1.173     schwarze 2123:                r->last->endspan = 2;
                   2124:                goto out;
                   2125:        }
                   2126:
1.238     schwarze 2127:        while (buf->buf[pos] == ' ')
1.173     schwarze 2128:                pos++;
                   2129:
                   2130:        /* An opening brace requests multiline scope. */
1.75      kristaps 2131:
1.238     schwarze 2132:        if (buf->buf[pos] == '\\' && buf->buf[pos + 1] == '{') {
1.75      kristaps 2133:                r->last->endspan = -1;
                   2134:                pos += 2;
1.173     schwarze 2135:                goto out;
1.207     schwarze 2136:        }
1.74      kristaps 2137:
1.77      kristaps 2138:        /*
1.173     schwarze 2139:         * Anything else following the conditional causes
                   2140:         * single-line scope.  Warn if the scope contains
                   2141:         * nothing but trailing whitespace.
1.77      kristaps 2142:         */
                   2143:
1.238     schwarze 2144:        if (buf->buf[pos] == '\0')
1.216     schwarze 2145:                mandoc_msg(MANDOCERR_COND_EMPTY, r->parse,
                   2146:                    ln, ppos, roffs[tok].name);
1.77      kristaps 2147:
1.173     schwarze 2148:        r->last->endspan = 1;
1.74      kristaps 2149:
1.173     schwarze 2150: out:
1.75      kristaps 2151:        *offs = pos;
                   2152:        return(ROFF_RERUN);
1.83      schwarze 2153: }
                   2154:
                   2155: static enum rofferr
1.92      schwarze 2156: roff_ds(ROFF_ARGS)
                   2157: {
1.212     schwarze 2158:        char            *string;
                   2159:        const char      *name;
                   2160:        size_t           namesz;
1.96      kristaps 2161:
1.251     schwarze 2162:        /* Ignore groff compatibility mode for now. */
                   2163:
                   2164:        if (tok == ROFF_ds1)
                   2165:                tok = ROFF_ds;
                   2166:        else if (tok == ROFF_as1)
                   2167:                tok = ROFF_as;
                   2168:
1.96      kristaps 2169:        /*
1.212     schwarze 2170:         * The first word is the name of the string.
                   2171:         * If it is empty or terminated by an escape sequence,
                   2172:         * abort the `ds' request without defining anything.
1.96      kristaps 2173:         */
1.92      schwarze 2174:
1.238     schwarze 2175:        name = string = buf->buf + pos;
                   2176:        if (*name == '\0')
1.92      schwarze 2177:                return(ROFF_IGN);
                   2178:
1.212     schwarze 2179:        namesz = roff_getname(r, &string, ln, pos);
1.238     schwarze 2180:        if (name[namesz] == '\\')
1.212     schwarze 2181:                return(ROFF_IGN);
                   2182:
                   2183:        /* Read past the initial double-quote, if any. */
1.238     schwarze 2184:        if (*string == '"')
1.92      schwarze 2185:                string++;
                   2186:
1.96      kristaps 2187:        /* The rest is the value. */
1.212     schwarze 2188:        roff_setstrn(&r->strtab, name, namesz, string, strlen(string),
                   2189:            ROFF_as == tok);
1.92      schwarze 2190:        return(ROFF_IGN);
                   2191: }
                   2192:
1.204     schwarze 2193: /*
                   2194:  * Parse a single operator, one or two characters long.
                   2195:  * If the operator is recognized, return success and advance the
                   2196:  * parse point, else return failure and let the parse point unchanged.
                   2197:  */
                   2198: static int
                   2199: roff_getop(const char *v, int *pos, char *res)
                   2200: {
                   2201:
                   2202:        *res = v[*pos];
                   2203:
                   2204:        switch (*res) {
1.207     schwarze 2205:        case '+':
1.204     schwarze 2206:                /* FALLTHROUGH */
1.207     schwarze 2207:        case '-':
1.204     schwarze 2208:                /* FALLTHROUGH */
1.207     schwarze 2209:        case '*':
1.204     schwarze 2210:                /* FALLTHROUGH */
1.207     schwarze 2211:        case '/':
1.204     schwarze 2212:                /* FALLTHROUGH */
1.207     schwarze 2213:        case '%':
1.204     schwarze 2214:                /* FALLTHROUGH */
1.207     schwarze 2215:        case '&':
1.204     schwarze 2216:                /* FALLTHROUGH */
1.207     schwarze 2217:        case ':':
1.204     schwarze 2218:                break;
                   2219:        case '<':
                   2220:                switch (v[*pos + 1]) {
1.207     schwarze 2221:                case '=':
1.204     schwarze 2222:                        *res = 'l';
                   2223:                        (*pos)++;
                   2224:                        break;
1.207     schwarze 2225:                case '>':
1.204     schwarze 2226:                        *res = '!';
                   2227:                        (*pos)++;
                   2228:                        break;
1.207     schwarze 2229:                case '?':
1.204     schwarze 2230:                        *res = 'i';
                   2231:                        (*pos)++;
                   2232:                        break;
                   2233:                default:
                   2234:                        break;
                   2235:                }
                   2236:                break;
                   2237:        case '>':
                   2238:                switch (v[*pos + 1]) {
1.207     schwarze 2239:                case '=':
1.204     schwarze 2240:                        *res = 'g';
                   2241:                        (*pos)++;
                   2242:                        break;
1.207     schwarze 2243:                case '?':
1.204     schwarze 2244:                        *res = 'a';
                   2245:                        (*pos)++;
                   2246:                        break;
                   2247:                default:
                   2248:                        break;
                   2249:                }
                   2250:                break;
                   2251:        case '=':
                   2252:                if ('=' == v[*pos + 1])
                   2253:                        (*pos)++;
                   2254:                break;
                   2255:        default:
                   2256:                return(0);
                   2257:        }
                   2258:        (*pos)++;
                   2259:
                   2260:        return(*res);
                   2261: }
                   2262:
                   2263: /*
                   2264:  * Evaluate either a parenthesized numeric expression
                   2265:  * or a single signed integer number.
                   2266:  */
                   2267: static int
1.235     schwarze 2268: roff_evalpar(struct roff *r, int ln,
1.261     schwarze 2269:        const char *v, int *pos, int *res, int flags)
1.204     schwarze 2270: {
                   2271:
                   2272:        if ('(' != v[*pos])
1.261     schwarze 2273:                return(roff_getnum(v, pos, res, flags));
1.204     schwarze 2274:
                   2275:        (*pos)++;
1.261     schwarze 2276:        if ( ! roff_evalnum(r, ln, v, pos, res, flags | ROFFNUM_WHITE))
1.204     schwarze 2277:                return(0);
                   2278:
1.206     schwarze 2279:        /*
                   2280:         * Omission of the closing parenthesis
                   2281:         * is an error in validation mode,
                   2282:         * but ignored in evaluation mode.
                   2283:         */
                   2284:
1.204     schwarze 2285:        if (')' == v[*pos])
                   2286:                (*pos)++;
1.206     schwarze 2287:        else if (NULL == res)
                   2288:                return(0);
1.204     schwarze 2289:
                   2290:        return(1);
                   2291: }
                   2292:
                   2293: /*
                   2294:  * Evaluate a complete numeric expression.
                   2295:  * Proceed left to right, there is no concept of precedence.
                   2296:  */
                   2297: static int
1.235     schwarze 2298: roff_evalnum(struct roff *r, int ln, const char *v,
1.261     schwarze 2299:        int *pos, int *res, int flags)
1.204     schwarze 2300: {
                   2301:        int              mypos, operand2;
                   2302:        char             operator;
                   2303:
                   2304:        if (NULL == pos) {
                   2305:                mypos = 0;
                   2306:                pos = &mypos;
                   2307:        }
                   2308:
1.261     schwarze 2309:        if (flags & ROFFNUM_WHITE)
1.204     schwarze 2310:                while (isspace((unsigned char)v[*pos]))
                   2311:                        (*pos)++;
                   2312:
1.261     schwarze 2313:        if ( ! roff_evalpar(r, ln, v, pos, res, flags))
1.204     schwarze 2314:                return(0);
                   2315:
                   2316:        while (1) {
1.261     schwarze 2317:                if (flags & ROFFNUM_WHITE)
1.204     schwarze 2318:                        while (isspace((unsigned char)v[*pos]))
                   2319:                                (*pos)++;
                   2320:
                   2321:                if ( ! roff_getop(v, pos, &operator))
                   2322:                        break;
                   2323:
1.261     schwarze 2324:                if (flags & ROFFNUM_WHITE)
1.204     schwarze 2325:                        while (isspace((unsigned char)v[*pos]))
                   2326:                                (*pos)++;
                   2327:
1.261     schwarze 2328:                if ( ! roff_evalpar(r, ln, v, pos, &operand2, flags))
1.204     schwarze 2329:                        return(0);
                   2330:
1.261     schwarze 2331:                if (flags & ROFFNUM_WHITE)
1.204     schwarze 2332:                        while (isspace((unsigned char)v[*pos]))
                   2333:                                (*pos)++;
1.206     schwarze 2334:
                   2335:                if (NULL == res)
                   2336:                        continue;
1.204     schwarze 2337:
                   2338:                switch (operator) {
1.207     schwarze 2339:                case '+':
1.204     schwarze 2340:                        *res += operand2;
                   2341:                        break;
1.207     schwarze 2342:                case '-':
1.204     schwarze 2343:                        *res -= operand2;
                   2344:                        break;
1.207     schwarze 2345:                case '*':
1.204     schwarze 2346:                        *res *= operand2;
                   2347:                        break;
1.207     schwarze 2348:                case '/':
1.244     schwarze 2349:                        if (operand2 == 0) {
1.235     schwarze 2350:                                mandoc_msg(MANDOCERR_DIVZERO,
1.234     kristaps 2351:                                        r->parse, ln, *pos, v);
                   2352:                                *res = 0;
                   2353:                                break;
                   2354:                        }
1.204     schwarze 2355:                        *res /= operand2;
                   2356:                        break;
1.207     schwarze 2357:                case '%':
1.244     schwarze 2358:                        if (operand2 == 0) {
                   2359:                                mandoc_msg(MANDOCERR_DIVZERO,
                   2360:                                        r->parse, ln, *pos, v);
                   2361:                                *res = 0;
                   2362:                                break;
                   2363:                        }
1.204     schwarze 2364:                        *res %= operand2;
                   2365:                        break;
1.207     schwarze 2366:                case '<':
1.204     schwarze 2367:                        *res = *res < operand2;
                   2368:                        break;
1.207     schwarze 2369:                case '>':
1.204     schwarze 2370:                        *res = *res > operand2;
                   2371:                        break;
1.207     schwarze 2372:                case 'l':
1.204     schwarze 2373:                        *res = *res <= operand2;
                   2374:                        break;
1.207     schwarze 2375:                case 'g':
1.204     schwarze 2376:                        *res = *res >= operand2;
                   2377:                        break;
1.207     schwarze 2378:                case '=':
1.204     schwarze 2379:                        *res = *res == operand2;
                   2380:                        break;
1.207     schwarze 2381:                case '!':
1.204     schwarze 2382:                        *res = *res != operand2;
                   2383:                        break;
1.207     schwarze 2384:                case '&':
1.204     schwarze 2385:                        *res = *res && operand2;
                   2386:                        break;
1.207     schwarze 2387:                case ':':
1.204     schwarze 2388:                        *res = *res || operand2;
                   2389:                        break;
1.207     schwarze 2390:                case 'i':
1.204     schwarze 2391:                        if (operand2 < *res)
                   2392:                                *res = operand2;
                   2393:                        break;
1.207     schwarze 2394:                case 'a':
1.204     schwarze 2395:                        if (operand2 > *res)
                   2396:                                *res = operand2;
                   2397:                        break;
                   2398:                default:
                   2399:                        abort();
                   2400:                }
                   2401:        }
                   2402:        return(1);
                   2403: }
                   2404:
1.266   ! schwarze 2405: /* --- register management ------------------------------------------------ */
        !          2406:
1.180     schwarze 2407: void
1.187     schwarze 2408: roff_setreg(struct roff *r, const char *name, int val, char sign)
1.147     kristaps 2409: {
1.180     schwarze 2410:        struct roffreg  *reg;
                   2411:
                   2412:        /* Search for an existing register with the same name. */
                   2413:        reg = r->regtab;
                   2414:
                   2415:        while (reg && strcmp(name, reg->key.p))
                   2416:                reg = reg->next;
1.147     kristaps 2417:
1.180     schwarze 2418:        if (NULL == reg) {
                   2419:                /* Create a new register. */
                   2420:                reg = mandoc_malloc(sizeof(struct roffreg));
                   2421:                reg->key.p = mandoc_strdup(name);
                   2422:                reg->key.sz = strlen(name);
1.187     schwarze 2423:                reg->val = 0;
1.180     schwarze 2424:                reg->next = r->regtab;
                   2425:                r->regtab = reg;
                   2426:        }
                   2427:
1.187     schwarze 2428:        if ('+' == sign)
                   2429:                reg->val += val;
                   2430:        else if ('-' == sign)
                   2431:                reg->val -= val;
                   2432:        else
                   2433:                reg->val = val;
1.147     kristaps 2434: }
                   2435:
1.192     schwarze 2436: /*
                   2437:  * Handle some predefined read-only number registers.
                   2438:  * For now, return -1 if the requested register is not predefined;
                   2439:  * in case a predefined read-only register having the value -1
                   2440:  * were to turn up, another special value would have to be chosen.
                   2441:  */
                   2442: static int
                   2443: roff_getregro(const char *name)
                   2444: {
                   2445:
                   2446:        switch (*name) {
1.207     schwarze 2447:        case 'A':  /* ASCII approximation mode is always off. */
1.192     schwarze 2448:                return(0);
1.207     schwarze 2449:        case 'g':  /* Groff compatibility mode is always on. */
1.192     schwarze 2450:                return(1);
1.207     schwarze 2451:        case 'H':  /* Fixed horizontal resolution. */
1.192     schwarze 2452:                return (24);
1.207     schwarze 2453:        case 'j':  /* Always adjust left margin only. */
1.192     schwarze 2454:                return(0);
1.207     schwarze 2455:        case 'T':  /* Some output device is always defined. */
1.192     schwarze 2456:                return(1);
1.207     schwarze 2457:        case 'V':  /* Fixed vertical resolution. */
1.192     schwarze 2458:                return (40);
                   2459:        default:
                   2460:                return (-1);
                   2461:        }
                   2462: }
                   2463:
1.181     schwarze 2464: int
1.180     schwarze 2465: roff_getreg(const struct roff *r, const char *name)
1.147     kristaps 2466: {
1.180     schwarze 2467:        struct roffreg  *reg;
1.192     schwarze 2468:        int              val;
                   2469:
                   2470:        if ('.' == name[0] && '\0' != name[1] && '\0' == name[2]) {
                   2471:                val = roff_getregro(name + 1);
                   2472:                if (-1 != val)
                   2473:                        return (val);
                   2474:        }
1.180     schwarze 2475:
                   2476:        for (reg = r->regtab; reg; reg = reg->next)
                   2477:                if (0 == strcmp(name, reg->key.p))
1.181     schwarze 2478:                        return(reg->val);
                   2479:
                   2480:        return(0);
                   2481: }
                   2482:
                   2483: static int
                   2484: roff_getregn(const struct roff *r, const char *name, size_t len)
                   2485: {
                   2486:        struct roffreg  *reg;
1.192     schwarze 2487:        int              val;
                   2488:
                   2489:        if ('.' == name[0] && 2 == len) {
                   2490:                val = roff_getregro(name + 1);
                   2491:                if (-1 != val)
                   2492:                        return (val);
                   2493:        }
1.181     schwarze 2494:
                   2495:        for (reg = r->regtab; reg; reg = reg->next)
                   2496:                if (len == reg->key.sz &&
                   2497:                    0 == strncmp(name, reg->key.p, len))
                   2498:                        return(reg->val);
1.147     kristaps 2499:
1.180     schwarze 2500:        return(0);
1.147     kristaps 2501: }
                   2502:
1.180     schwarze 2503: static void
                   2504: roff_freereg(struct roffreg *reg)
1.147     kristaps 2505: {
1.180     schwarze 2506:        struct roffreg  *old_reg;
1.147     kristaps 2507:
1.180     schwarze 2508:        while (NULL != reg) {
                   2509:                free(reg->key.p);
                   2510:                old_reg = reg;
                   2511:                reg = reg->next;
                   2512:                free(old_reg);
                   2513:        }
1.147     kristaps 2514: }
1.92      schwarze 2515:
                   2516: static enum rofferr
1.89      kristaps 2517: roff_nr(ROFF_ARGS)
1.83      schwarze 2518: {
1.212     schwarze 2519:        char            *key, *val;
                   2520:        size_t           keysz;
1.138     kristaps 2521:        int              iv;
1.187     schwarze 2522:        char             sign;
1.89      kristaps 2523:
1.238     schwarze 2524:        key = val = buf->buf + pos;
                   2525:        if (*key == '\0')
1.212     schwarze 2526:                return(ROFF_IGN);
                   2527:
                   2528:        keysz = roff_getname(r, &val, ln, pos);
1.238     schwarze 2529:        if (key[keysz] == '\\')
1.212     schwarze 2530:                return(ROFF_IGN);
                   2531:        key[keysz] = '\0';
1.89      kristaps 2532:
1.187     schwarze 2533:        sign = *val;
1.238     schwarze 2534:        if (sign == '+' || sign == '-')
1.187     schwarze 2535:                val++;
                   2536:
1.261     schwarze 2537:        if (roff_evalnum(r, ln, val, NULL, &iv, ROFFNUM_SCALE))
1.204     schwarze 2538:                roff_setreg(r, key, iv, sign);
1.109     kristaps 2539:
1.203     schwarze 2540:        return(ROFF_IGN);
                   2541: }
                   2542:
                   2543: static enum rofferr
                   2544: roff_rr(ROFF_ARGS)
                   2545: {
                   2546:        struct roffreg  *reg, **prev;
1.212     schwarze 2547:        char            *name, *cp;
                   2548:        size_t           namesz;
1.203     schwarze 2549:
1.238     schwarze 2550:        name = cp = buf->buf + pos;
                   2551:        if (*name == '\0')
1.212     schwarze 2552:                return(ROFF_IGN);
                   2553:        namesz = roff_getname(r, &cp, ln, pos);
                   2554:        name[namesz] = '\0';
1.203     schwarze 2555:
                   2556:        prev = &r->regtab;
                   2557:        while (1) {
                   2558:                reg = *prev;
1.238     schwarze 2559:                if (reg == NULL || !strcmp(name, reg->key.p))
1.203     schwarze 2560:                        break;
                   2561:                prev = &reg->next;
                   2562:        }
1.238     schwarze 2563:        if (reg != NULL) {
1.203     schwarze 2564:                *prev = reg->next;
                   2565:                free(reg->key.p);
                   2566:                free(reg);
                   2567:        }
1.122     schwarze 2568:        return(ROFF_IGN);
                   2569: }
                   2570:
1.266   ! schwarze 2571: /* --- handler functions for roff requests -------------------------------- */
        !          2572:
1.122     schwarze 2573: static enum rofferr
                   2574: roff_rm(ROFF_ARGS)
                   2575: {
                   2576:        const char       *name;
                   2577:        char             *cp;
1.212     schwarze 2578:        size_t            namesz;
1.122     schwarze 2579:
1.238     schwarze 2580:        cp = buf->buf + pos;
                   2581:        while (*cp != '\0') {
1.212     schwarze 2582:                name = cp;
1.238     schwarze 2583:                namesz = roff_getname(r, &cp, ln, (int)(cp - buf->buf));
1.212     schwarze 2584:                roff_setstrn(&r->strtab, name, namesz, NULL, 0, 0);
1.238     schwarze 2585:                if (name[namesz] == '\\')
1.212     schwarze 2586:                        break;
1.122     schwarze 2587:        }
1.178     schwarze 2588:        return(ROFF_IGN);
                   2589: }
                   2590:
                   2591: static enum rofferr
                   2592: roff_it(ROFF_ARGS)
                   2593: {
                   2594:        int              iv;
                   2595:
                   2596:        /* Parse the number of lines. */
1.261     schwarze 2597:
                   2598:        if ( ! roff_evalnum(r, ln, buf->buf, &pos, &iv, 0)) {
1.222     schwarze 2599:                mandoc_msg(MANDOCERR_IT_NONUM, r->parse,
1.238     schwarze 2600:                    ln, ppos, buf->buf + 1);
1.178     schwarze 2601:                return(ROFF_IGN);
                   2602:        }
                   2603:
1.262     schwarze 2604:        while (isspace((unsigned char)buf->buf[pos]))
                   2605:                pos++;
                   2606:
                   2607:        /*
                   2608:         * Arm the input line trap.
                   2609:         * Special-casing "an-trap" is an ugly workaround to cope
                   2610:         * with DocBook stupidly fiddling with man(7) internals.
                   2611:         */
1.261     schwarze 2612:
1.178     schwarze 2613:        roffit_lines = iv;
1.262     schwarze 2614:        roffit_macro = mandoc_strdup(iv != 1 ||
                   2615:            strcmp(buf->buf + pos, "an-trap") ?
                   2616:            buf->buf + pos : "br");
1.109     kristaps 2617:        return(ROFF_IGN);
1.175     schwarze 2618: }
                   2619:
                   2620: static enum rofferr
                   2621: roff_Dd(ROFF_ARGS)
                   2622: {
                   2623:        const char *const       *cp;
                   2624:
1.227     schwarze 2625:        if ((r->options & (MPARSE_MDOC | MPARSE_QUICK)) == 0)
1.175     schwarze 2626:                for (cp = __mdoc_reserved; *cp; cp++)
                   2627:                        roff_setstr(r, *cp, NULL, 0);
                   2628:
1.227     schwarze 2629:        if (r->format == 0)
                   2630:                r->format = MPARSE_MDOC;
                   2631:
1.175     schwarze 2632:        return(ROFF_CONT);
                   2633: }
                   2634:
                   2635: static enum rofferr
                   2636: roff_TH(ROFF_ARGS)
                   2637: {
                   2638:        const char *const       *cp;
                   2639:
1.227     schwarze 2640:        if ((r->options & MPARSE_QUICK) == 0)
1.175     schwarze 2641:                for (cp = __man_reserved; *cp; cp++)
                   2642:                        roff_setstr(r, *cp, NULL, 0);
                   2643:
1.227     schwarze 2644:        if (r->format == 0)
                   2645:                r->format = MPARSE_MAN;
                   2646:
1.175     schwarze 2647:        return(ROFF_CONT);
1.109     kristaps 2648: }
                   2649:
                   2650: static enum rofferr
                   2651: roff_TE(ROFF_ARGS)
                   2652: {
                   2653:
                   2654:        if (NULL == r->tbl)
1.221     schwarze 2655:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   2656:                    ln, ppos, "TE");
1.258     schwarze 2657:        else if ( ! tbl_end(&r->tbl)) {
                   2658:                free(buf->buf);
                   2659:                buf->buf = mandoc_strdup(".sp");
                   2660:                buf->sz = 4;
                   2661:                return(ROFF_REPARSE);
                   2662:        }
1.112     kristaps 2663:        return(ROFF_IGN);
                   2664: }
                   2665:
                   2666: static enum rofferr
                   2667: roff_T_(ROFF_ARGS)
                   2668: {
                   2669:
                   2670:        if (NULL == r->tbl)
1.221     schwarze 2671:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   2672:                    ln, ppos, "T&");
1.112     kristaps 2673:        else
1.116     kristaps 2674:                tbl_restart(ppos, ln, r->tbl);
1.112     kristaps 2675:
1.109     kristaps 2676:        return(ROFF_IGN);
                   2677: }
                   2678:
1.230     schwarze 2679: /*
                   2680:  * Handle in-line equation delimiters.
                   2681:  */
                   2682: static enum rofferr
1.238     schwarze 2683: roff_eqndelim(struct roff *r, struct buf *buf, int pos)
1.151     kristaps 2684: {
1.233     schwarze 2685:        char            *cp1, *cp2;
                   2686:        const char      *bef_pr, *bef_nl, *mac, *aft_nl, *aft_pr;
1.151     kristaps 2687:
1.230     schwarze 2688:        /*
                   2689:         * Outside equations, look for an opening delimiter.
                   2690:         * If we are inside an equation, we already know it is
                   2691:         * in-line, or this function wouldn't have been called;
                   2692:         * so look for a closing delimiter.
                   2693:         */
                   2694:
1.238     schwarze 2695:        cp1 = buf->buf + pos;
1.230     schwarze 2696:        cp2 = strchr(cp1, r->eqn == NULL ?
                   2697:            r->last_eqn->odelim : r->last_eqn->cdelim);
                   2698:        if (cp2 == NULL)
                   2699:                return(ROFF_CONT);
                   2700:
1.233     schwarze 2701:        *cp2++ = '\0';
                   2702:        bef_pr = bef_nl = aft_nl = aft_pr = "";
                   2703:
                   2704:        /* Handle preceding text, protecting whitespace. */
                   2705:
1.238     schwarze 2706:        if (*buf->buf != '\0') {
1.233     schwarze 2707:                if (r->eqn == NULL)
                   2708:                        bef_pr = "\\&";
                   2709:                bef_nl = "\n";
                   2710:        }
                   2711:
                   2712:        /*
                   2713:         * Prepare replacing the delimiter with an equation macro
                   2714:         * and drop leading white space from the equation.
                   2715:         */
1.230     schwarze 2716:
1.233     schwarze 2717:        if (r->eqn == NULL) {
                   2718:                while (*cp2 == ' ')
                   2719:                        cp2++;
                   2720:                mac = ".EQ";
                   2721:        } else
                   2722:                mac = ".EN";
                   2723:
                   2724:        /* Handle following text, protecting whitespace. */
                   2725:
                   2726:        if (*cp2 != '\0') {
                   2727:                aft_nl = "\n";
                   2728:                if (r->eqn != NULL)
                   2729:                        aft_pr = "\\&";
                   2730:        }
                   2731:
                   2732:        /* Do the actual replacement. */
                   2733:
1.238     schwarze 2734:        buf->sz = mandoc_asprintf(&cp1, "%s%s%s%s%s%s%s", buf->buf,
1.233     schwarze 2735:            bef_pr, bef_nl, mac, aft_nl, aft_pr, cp2) + 1;
1.238     schwarze 2736:        free(buf->buf);
                   2737:        buf->buf = cp1;
1.230     schwarze 2738:
                   2739:        /* Toggle the in-line state of the eqn subsystem. */
                   2740:
                   2741:        r->eqn_inline = r->eqn == NULL;
                   2742:        return(ROFF_REPARSE);
1.151     kristaps 2743: }
                   2744:
1.235     schwarze 2745: static enum rofferr
                   2746: roff_EQ(ROFF_ARGS)
1.125     kristaps 2747: {
1.151     kristaps 2748:        struct eqn_node *e;
1.125     kristaps 2749:
1.238     schwarze 2750:        assert(r->eqn == NULL);
1.235     schwarze 2751:        e = eqn_alloc(ppos, ln, r->parse);
1.125     kristaps 2752:
1.230     schwarze 2753:        if (r->last_eqn) {
1.125     kristaps 2754:                r->last_eqn->next = e;
1.230     schwarze 2755:                e->delim = r->last_eqn->delim;
                   2756:                e->odelim = r->last_eqn->odelim;
                   2757:                e->cdelim = r->last_eqn->cdelim;
                   2758:        } else
1.125     kristaps 2759:                r->first_eqn = r->last_eqn = e;
                   2760:
                   2761:        r->eqn = r->last_eqn = e;
1.151     kristaps 2762:
1.238     schwarze 2763:        if (buf->buf[pos] != '\0')
1.235     schwarze 2764:                mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
1.238     schwarze 2765:                    ".EQ %s", buf->buf + pos);
1.151     kristaps 2766:
1.125     kristaps 2767:        return(ROFF_IGN);
                   2768: }
                   2769:
                   2770: static enum rofferr
                   2771: roff_EN(ROFF_ARGS)
                   2772: {
                   2773:
1.221     schwarze 2774:        mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse, ln, ppos, "EN");
1.125     kristaps 2775:        return(ROFF_IGN);
                   2776: }
                   2777:
                   2778: static enum rofferr
1.109     kristaps 2779: roff_TS(ROFF_ARGS)
                   2780: {
1.176     schwarze 2781:        struct tbl_node *tbl;
1.89      kristaps 2782:
1.115     kristaps 2783:        if (r->tbl) {
1.221     schwarze 2784:                mandoc_msg(MANDOCERR_BLK_BROKEN, r->parse,
                   2785:                    ln, ppos, "TS breaks TS");
1.151     kristaps 2786:                tbl_end(&r->tbl);
1.115     kristaps 2787:        }
1.83      schwarze 2788:
1.176     schwarze 2789:        tbl = tbl_alloc(ppos, ln, r->parse);
1.113     kristaps 2790:
                   2791:        if (r->last_tbl)
1.176     schwarze 2792:                r->last_tbl->next = tbl;
1.113     kristaps 2793:        else
1.176     schwarze 2794:                r->first_tbl = r->last_tbl = tbl;
1.113     kristaps 2795:
1.176     schwarze 2796:        r->tbl = r->last_tbl = tbl;
1.83      schwarze 2797:        return(ROFF_IGN);
1.251     schwarze 2798: }
                   2799:
                   2800: static enum rofferr
                   2801: roff_brp(ROFF_ARGS)
                   2802: {
                   2803:
                   2804:        buf->buf[pos - 1] = '\0';
                   2805:        return(ROFF_CONT);
1.92      schwarze 2806: }
                   2807:
1.105     kristaps 2808: static enum rofferr
1.174     kristaps 2809: roff_cc(ROFF_ARGS)
                   2810: {
                   2811:        const char      *p;
                   2812:
1.238     schwarze 2813:        p = buf->buf + pos;
1.174     kristaps 2814:
1.238     schwarze 2815:        if (*p == '\0' || (r->control = *p++) == '.')
1.174     kristaps 2816:                r->control = 0;
                   2817:
1.238     schwarze 2818:        if (*p != '\0')
1.260     schwarze 2819:                mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse,
                   2820:                    ln, p - buf->buf, "cc ... %s", p);
1.174     kristaps 2821:
                   2822:        return(ROFF_IGN);
                   2823: }
                   2824:
                   2825: static enum rofferr
1.164     kristaps 2826: roff_tr(ROFF_ARGS)
                   2827: {
                   2828:        const char      *p, *first, *second;
                   2829:        size_t           fsz, ssz;
                   2830:        enum mandoc_esc  esc;
                   2831:
1.238     schwarze 2832:        p = buf->buf + pos;
1.164     kristaps 2833:
1.238     schwarze 2834:        if (*p == '\0') {
1.260     schwarze 2835:                mandoc_msg(MANDOCERR_REQ_EMPTY, r->parse, ln, ppos, "tr");
1.164     kristaps 2836:                return(ROFF_IGN);
                   2837:        }
                   2838:
1.238     schwarze 2839:        while (*p != '\0') {
1.164     kristaps 2840:                fsz = ssz = 1;
                   2841:
                   2842:                first = p++;
1.238     schwarze 2843:                if (*first == '\\') {
1.164     kristaps 2844:                        esc = mandoc_escape(&p, NULL, NULL);
1.238     schwarze 2845:                        if (esc == ESCAPE_ERROR) {
1.219     schwarze 2846:                                mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.238     schwarze 2847:                                    ln, (int)(p - buf->buf), first);
1.164     kristaps 2848:                                return(ROFF_IGN);
                   2849:                        }
                   2850:                        fsz = (size_t)(p - first);
                   2851:                }
                   2852:
                   2853:                second = p++;
1.238     schwarze 2854:                if (*second == '\\') {
1.164     kristaps 2855:                        esc = mandoc_escape(&p, NULL, NULL);
1.238     schwarze 2856:                        if (esc == ESCAPE_ERROR) {
1.219     schwarze 2857:                                mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.238     schwarze 2858:                                    ln, (int)(p - buf->buf), second);
1.164     kristaps 2859:                                return(ROFF_IGN);
                   2860:                        }
                   2861:                        ssz = (size_t)(p - second);
1.238     schwarze 2862:                } else if (*second == '\0') {
1.260     schwarze 2863:                        mandoc_vmsg(MANDOCERR_TR_ODD, r->parse,
                   2864:                            ln, first - buf->buf, "tr %s", first);
1.164     kristaps 2865:                        second = " ";
1.165     kristaps 2866:                        p--;
1.164     kristaps 2867:                }
                   2868:
1.167     kristaps 2869:                if (fsz > 1) {
1.207     schwarze 2870:                        roff_setstrn(&r->xmbtab, first, fsz,
                   2871:                            second, ssz, 0);
1.167     kristaps 2872:                        continue;
                   2873:                }
                   2874:
1.238     schwarze 2875:                if (r->xtab == NULL)
1.207     schwarze 2876:                        r->xtab = mandoc_calloc(128,
                   2877:                            sizeof(struct roffstr));
1.167     kristaps 2878:
                   2879:                free(r->xtab[(int)*first].p);
                   2880:                r->xtab[(int)*first].p = mandoc_strndup(second, ssz);
                   2881:                r->xtab[(int)*first].sz = ssz;
1.164     kristaps 2882:        }
                   2883:
                   2884:        return(ROFF_IGN);
                   2885: }
                   2886:
                   2887: static enum rofferr
1.105     kristaps 2888: roff_so(ROFF_ARGS)
                   2889: {
1.249     schwarze 2890:        char *name, *cp;
1.105     kristaps 2891:
1.238     schwarze 2892:        name = buf->buf + pos;
1.224     schwarze 2893:        mandoc_vmsg(MANDOCERR_SO, r->parse, ln, ppos, "so %s", name);
1.105     kristaps 2894:
                   2895:        /*
                   2896:         * Handle `so'.  Be EXTREMELY careful, as we shouldn't be
                   2897:         * opening anything that's not in our cwd or anything beneath
                   2898:         * it.  Thus, explicitly disallow traversing up the file-system
                   2899:         * or using absolute paths.
                   2900:         */
                   2901:
1.238     schwarze 2902:        if (*name == '/' || strstr(name, "../") || strstr(name, "/..")) {
1.210     schwarze 2903:                mandoc_vmsg(MANDOCERR_SO_PATH, r->parse, ln, ppos,
                   2904:                    ".so %s", name);
1.249     schwarze 2905:                buf->sz = mandoc_asprintf(&cp,
                   2906:                    ".sp\nSee the file %s.\n.sp", name) + 1;
                   2907:                free(buf->buf);
                   2908:                buf->buf = cp;
                   2909:                *offs = 0;
                   2910:                return(ROFF_REPARSE);
1.105     kristaps 2911:        }
                   2912:
                   2913:        *offs = pos;
                   2914:        return(ROFF_SO);
                   2915: }
1.92      schwarze 2916:
1.266   ! schwarze 2917: /* --- user defined strings and macros ------------------------------------ */
        !          2918:
1.106     kristaps 2919: static enum rofferr
                   2920: roff_userdef(ROFF_ARGS)
1.99      kristaps 2921: {
1.263     schwarze 2922:        const char       *arg[9], *ap;
1.106     kristaps 2923:        char             *cp, *n1, *n2;
1.119     schwarze 2924:        int               i;
1.263     schwarze 2925:        size_t            asz, rsz;
1.106     kristaps 2926:
                   2927:        /*
                   2928:         * Collect pointers to macro argument strings
1.188     schwarze 2929:         * and NUL-terminate them.
1.106     kristaps 2930:         */
1.263     schwarze 2931:
1.238     schwarze 2932:        cp = buf->buf + pos;
1.119     schwarze 2933:        for (i = 0; i < 9; i++)
1.238     schwarze 2934:                arg[i] = *cp == '\0' ? "" :
1.136     kristaps 2935:                    mandoc_getarg(r->parse, &cp, ln, &pos);
1.99      kristaps 2936:
1.106     kristaps 2937:        /*
                   2938:         * Expand macro arguments.
1.99      kristaps 2939:         */
1.263     schwarze 2940:
                   2941:        buf->sz = strlen(r->current_string) + 1;
                   2942:        n1 = cp = mandoc_malloc(buf->sz);
                   2943:        memcpy(n1, r->current_string, buf->sz);
                   2944:        while (*cp != '\0') {
                   2945:
                   2946:                /* Scan ahead for the next argument invocation. */
                   2947:
                   2948:                if (*cp++ != '\\')
                   2949:                        continue;
                   2950:                if (*cp++ != '$')
                   2951:                        continue;
                   2952:                i = *cp - '1';
                   2953:                if (0 > i || 8 < i)
1.106     kristaps 2954:                        continue;
1.263     schwarze 2955:                cp -= 2;
                   2956:
                   2957:                /*
                   2958:                 * Determine the size of the expanded argument,
                   2959:                 * taking escaping of quotes into account.
                   2960:                 */
                   2961:
                   2962:                asz = 0;
                   2963:                for (ap = arg[i]; *ap != '\0'; ap++) {
                   2964:                        asz++;
                   2965:                        if (*ap == '"')
                   2966:                                asz += 3;
                   2967:                }
                   2968:                if (asz != 3) {
                   2969:
                   2970:                        /*
                   2971:                         * Determine the size of the rest of the
                   2972:                         * unexpanded macro, including the NUL.
                   2973:                         */
                   2974:
                   2975:                        rsz = buf->sz - (cp - n1) - 3;
                   2976:
                   2977:                        /*
                   2978:                         * When shrinking, move before
                   2979:                         * releasing the storage.
                   2980:                         */
                   2981:
                   2982:                        if (asz < 3)
                   2983:                                memmove(cp + asz, cp + 3, rsz);
                   2984:
                   2985:                        /*
                   2986:                         * Resize the storage for the macro
                   2987:                         * and readjust the parse pointer.
                   2988:                         */
                   2989:
                   2990:                        buf->sz += asz - 3;
                   2991:                        n2 = mandoc_realloc(n1, buf->sz);
                   2992:                        cp = n2 + (cp - n1);
                   2993:                        n1 = n2;
                   2994:
                   2995:                        /*
                   2996:                         * When growing, make room
                   2997:                         * for the expanded argument.
                   2998:                         */
                   2999:
                   3000:                        if (asz > 3)
                   3001:                                memmove(cp + asz, cp + 3, rsz);
                   3002:                }
                   3003:
                   3004:                /* Copy the expanded argument, escaping quotes. */
                   3005:
                   3006:                n2 = cp;
                   3007:                for (ap = arg[i]; *ap != '\0'; ap++) {
                   3008:                        if (*ap == '"') {
                   3009:                                memcpy(n2, "\\(dq", 4);
                   3010:                                n2 += 4;
                   3011:                        } else
                   3012:                                *n2++ = *ap;
1.106     kristaps 3013:                }
1.99      kristaps 3014:        }
                   3015:
1.106     kristaps 3016:        /*
                   3017:         * Replace the macro invocation
                   3018:         * by the expanded macro.
                   3019:         */
1.263     schwarze 3020:
1.238     schwarze 3021:        free(buf->buf);
                   3022:        buf->buf = n1;
1.248     schwarze 3023:        *offs = 0;
1.106     kristaps 3024:
1.238     schwarze 3025:        return(buf->sz > 1 && buf->buf[buf->sz - 2] == '\n' ?
1.106     kristaps 3026:           ROFF_REPARSE : ROFF_APPEND);
1.99      kristaps 3027: }
1.121     schwarze 3028:
1.212     schwarze 3029: static size_t
1.121     schwarze 3030: roff_getname(struct roff *r, char **cpp, int ln, int pos)
                   3031: {
                   3032:        char     *name, *cp;
1.212     schwarze 3033:        size_t    namesz;
1.121     schwarze 3034:
                   3035:        name = *cpp;
                   3036:        if ('\0' == *name)
1.212     schwarze 3037:                return(0);
1.121     schwarze 3038:
1.212     schwarze 3039:        /* Read until end of name and terminate it with NUL. */
                   3040:        for (cp = name; 1; cp++) {
                   3041:                if ('\0' == *cp || ' ' == *cp) {
                   3042:                        namesz = cp - name;
                   3043:                        break;
                   3044:                }
1.121     schwarze 3045:                if ('\\' != *cp)
                   3046:                        continue;
1.215     schwarze 3047:                namesz = cp - name;
                   3048:                if ('{' == cp[1] || '}' == cp[1])
                   3049:                        break;
1.121     schwarze 3050:                cp++;
                   3051:                if ('\\' == *cp)
                   3052:                        continue;
1.224     schwarze 3053:                mandoc_vmsg(MANDOCERR_NAMESC, r->parse, ln, pos,
                   3054:                    "%.*s", (int)(cp - name + 1), name);
1.212     schwarze 3055:                mandoc_escape((const char **)&cp, NULL, NULL);
                   3056:                break;
1.121     schwarze 3057:        }
                   3058:
                   3059:        /* Read past spaces. */
                   3060:        while (' ' == *cp)
                   3061:                cp++;
                   3062:
                   3063:        *cpp = cp;
1.212     schwarze 3064:        return(namesz);
1.121     schwarze 3065: }
                   3066:
1.106     kristaps 3067: /*
                   3068:  * Store *string into the user-defined string called *name.
                   3069:  * To clear an existing entry, call with (*r, *name, NULL, 0).
1.193     schwarze 3070:  * append == 0: replace mode
                   3071:  * append == 1: single-line append mode
                   3072:  * append == 2: multiline append mode, append '\n' after each call
1.106     kristaps 3073:  */
1.94      kristaps 3074: static void
1.106     kristaps 3075: roff_setstr(struct roff *r, const char *name, const char *string,
1.193     schwarze 3076:        int append)
1.92      schwarze 3077: {
1.164     kristaps 3078:
                   3079:        roff_setstrn(&r->strtab, name, strlen(name), string,
1.207     schwarze 3080:            string ? strlen(string) : 0, append);
1.164     kristaps 3081: }
                   3082:
                   3083: static void
1.166     kristaps 3084: roff_setstrn(struct roffkv **r, const char *name, size_t namesz,
1.193     schwarze 3085:                const char *string, size_t stringsz, int append)
1.164     kristaps 3086: {
1.166     kristaps 3087:        struct roffkv   *n;
1.164     kristaps 3088:        char            *c;
                   3089:        int              i;
                   3090:        size_t           oldch, newch;
1.92      schwarze 3091:
1.106     kristaps 3092:        /* Search for an existing string with the same name. */
1.164     kristaps 3093:        n = *r;
                   3094:
1.211     schwarze 3095:        while (n && (namesz != n->key.sz ||
                   3096:                        strncmp(n->key.p, name, namesz)))
1.92      schwarze 3097:                n = n->next;
1.94      kristaps 3098:
                   3099:        if (NULL == n) {
1.106     kristaps 3100:                /* Create a new string table entry. */
1.166     kristaps 3101:                n = mandoc_malloc(sizeof(struct roffkv));
                   3102:                n->key.p = mandoc_strndup(name, namesz);
                   3103:                n->key.sz = namesz;
                   3104:                n->val.p = NULL;
                   3105:                n->val.sz = 0;
1.164     kristaps 3106:                n->next = *r;
                   3107:                *r = n;
1.193     schwarze 3108:        } else if (0 == append) {
1.166     kristaps 3109:                free(n->val.p);
                   3110:                n->val.p = NULL;
                   3111:                n->val.sz = 0;
1.106     kristaps 3112:        }
                   3113:
                   3114:        if (NULL == string)
                   3115:                return;
                   3116:
                   3117:        /*
                   3118:         * One additional byte for the '\n' in multiline mode,
                   3119:         * and one for the terminating '\0'.
                   3120:         */
1.193     schwarze 3121:        newch = stringsz + (1 < append ? 2u : 1u);
1.164     kristaps 3122:
1.166     kristaps 3123:        if (NULL == n->val.p) {
                   3124:                n->val.p = mandoc_malloc(newch);
                   3125:                *n->val.p = '\0';
1.106     kristaps 3126:                oldch = 0;
                   3127:        } else {
1.166     kristaps 3128:                oldch = n->val.sz;
                   3129:                n->val.p = mandoc_realloc(n->val.p, oldch + newch);
1.106     kristaps 3130:        }
                   3131:
                   3132:        /* Skip existing content in the destination buffer. */
1.166     kristaps 3133:        c = n->val.p + (int)oldch;
1.106     kristaps 3134:
                   3135:        /* Append new content to the destination buffer. */
1.164     kristaps 3136:        i = 0;
                   3137:        while (i < (int)stringsz) {
1.106     kristaps 3138:                /*
                   3139:                 * Rudimentary roff copy mode:
                   3140:                 * Handle escaped backslashes.
                   3141:                 */
1.164     kristaps 3142:                if ('\\' == string[i] && '\\' == string[i + 1])
                   3143:                        i++;
                   3144:                *c++ = string[i++];
1.106     kristaps 3145:        }
1.94      kristaps 3146:
1.106     kristaps 3147:        /* Append terminating bytes. */
1.193     schwarze 3148:        if (1 < append)
1.106     kristaps 3149:                *c++ = '\n';
1.163     kristaps 3150:
1.106     kristaps 3151:        *c = '\0';
1.166     kristaps 3152:        n->val.sz = (int)(c - n->val.p);
1.92      schwarze 3153: }
                   3154:
1.94      kristaps 3155: static const char *
                   3156: roff_getstrn(const struct roff *r, const char *name, size_t len)
1.92      schwarze 3157: {
1.166     kristaps 3158:        const struct roffkv *n;
1.191     schwarze 3159:        int i;
1.92      schwarze 3160:
1.164     kristaps 3161:        for (n = r->strtab; n; n = n->next)
1.207     schwarze 3162:                if (0 == strncmp(name, n->key.p, len) &&
                   3163:                    '\0' == n->key.p[(int)len])
1.166     kristaps 3164:                        return(n->val.p);
1.191     schwarze 3165:
                   3166:        for (i = 0; i < PREDEFS_MAX; i++)
                   3167:                if (0 == strncmp(name, predefs[i].name, len) &&
                   3168:                                '\0' == predefs[i].name[(int)len])
                   3169:                        return(predefs[i].str);
1.94      kristaps 3170:
1.157     kristaps 3171:        return(NULL);
1.92      schwarze 3172: }
                   3173:
1.94      kristaps 3174: static void
1.167     kristaps 3175: roff_freestr(struct roffkv *r)
1.92      schwarze 3176: {
1.166     kristaps 3177:        struct roffkv    *n, *nn;
1.92      schwarze 3178:
1.167     kristaps 3179:        for (n = r; n; n = nn) {
1.166     kristaps 3180:                free(n->key.p);
                   3181:                free(n->val.p);
1.92      schwarze 3182:                nn = n->next;
                   3183:                free(n);
                   3184:        }
1.114     kristaps 3185: }
1.266   ! schwarze 3186:
        !          3187: /* --- accessors and utility functions ------------------------------------ */
1.114     kristaps 3188:
                   3189: const struct tbl_span *
                   3190: roff_span(const struct roff *r)
                   3191: {
1.207     schwarze 3192:
1.114     kristaps 3193:        return(r->tbl ? tbl_span(r->tbl) : NULL);
1.125     kristaps 3194: }
                   3195:
                   3196: const struct eqn *
                   3197: roff_eqn(const struct roff *r)
                   3198: {
1.207     schwarze 3199:
1.125     kristaps 3200:        return(r->last_eqn ? &r->last_eqn->eqn : NULL);
1.164     kristaps 3201: }
                   3202:
                   3203: /*
                   3204:  * Duplicate an input string, making the appropriate character
                   3205:  * conversations (as stipulated by `tr') along the way.
                   3206:  * Returns a heap-allocated string with all the replacements made.
                   3207:  */
                   3208: char *
                   3209: roff_strdup(const struct roff *r, const char *p)
                   3210: {
1.166     kristaps 3211:        const struct roffkv *cp;
1.164     kristaps 3212:        char            *res;
                   3213:        const char      *pp;
                   3214:        size_t           ssz, sz;
                   3215:        enum mandoc_esc  esc;
                   3216:
1.167     kristaps 3217:        if (NULL == r->xmbtab && NULL == r->xtab)
1.164     kristaps 3218:                return(mandoc_strdup(p));
                   3219:        else if ('\0' == *p)
                   3220:                return(mandoc_strdup(""));
                   3221:
                   3222:        /*
                   3223:         * Step through each character looking for term matches
                   3224:         * (remember that a `tr' can be invoked with an escape, which is
                   3225:         * a glyph but the escape is multi-character).
                   3226:         * We only do this if the character hash has been initialised
                   3227:         * and the string is >0 length.
                   3228:         */
                   3229:
                   3230:        res = NULL;
                   3231:        ssz = 0;
                   3232:
                   3233:        while ('\0' != *p) {
1.167     kristaps 3234:                if ('\\' != *p && r->xtab && r->xtab[(int)*p].p) {
                   3235:                        sz = r->xtab[(int)*p].sz;
                   3236:                        res = mandoc_realloc(res, ssz + sz + 1);
                   3237:                        memcpy(res + ssz, r->xtab[(int)*p].p, sz);
                   3238:                        ssz += sz;
                   3239:                        p++;
                   3240:                        continue;
                   3241:                } else if ('\\' != *p) {
                   3242:                        res = mandoc_realloc(res, ssz + 2);
                   3243:                        res[ssz++] = *p++;
                   3244:                        continue;
                   3245:                }
                   3246:
1.164     kristaps 3247:                /* Search for term matches. */
1.167     kristaps 3248:                for (cp = r->xmbtab; cp; cp = cp->next)
1.166     kristaps 3249:                        if (0 == strncmp(p, cp->key.p, cp->key.sz))
1.164     kristaps 3250:                                break;
                   3251:
                   3252:                if (NULL != cp) {
                   3253:                        /*
                   3254:                         * A match has been found.
                   3255:                         * Append the match to the array and move
                   3256:                         * forward by its keysize.
                   3257:                         */
1.207     schwarze 3258:                        res = mandoc_realloc(res,
                   3259:                            ssz + cp->val.sz + 1);
1.166     kristaps 3260:                        memcpy(res + ssz, cp->val.p, cp->val.sz);
                   3261:                        ssz += cp->val.sz;
                   3262:                        p += (int)cp->key.sz;
1.164     kristaps 3263:                        continue;
                   3264:                }
                   3265:
1.167     kristaps 3266:                /*
                   3267:                 * Handle escapes carefully: we need to copy
                   3268:                 * over just the escape itself, or else we might
                   3269:                 * do replacements within the escape itself.
                   3270:                 * Make sure to pass along the bogus string.
                   3271:                 */
                   3272:                pp = p++;
                   3273:                esc = mandoc_escape(&p, NULL, NULL);
                   3274:                if (ESCAPE_ERROR == esc) {
                   3275:                        sz = strlen(pp);
1.164     kristaps 3276:                        res = mandoc_realloc(res, ssz + sz + 1);
                   3277:                        memcpy(res + ssz, pp, sz);
1.167     kristaps 3278:                        break;
1.164     kristaps 3279:                }
1.207     schwarze 3280:                /*
                   3281:                 * We bail out on bad escapes.
1.167     kristaps 3282:                 * No need to warn: we already did so when
                   3283:                 * roff_res() was called.
                   3284:                 */
                   3285:                sz = (int)(p - pp);
                   3286:                res = mandoc_realloc(res, ssz + sz + 1);
                   3287:                memcpy(res + ssz, pp, sz);
                   3288:                ssz += sz;
1.164     kristaps 3289:        }
                   3290:
                   3291:        res[(int)ssz] = '\0';
                   3292:        return(res);
1.227     schwarze 3293: }
                   3294:
                   3295: int
                   3296: roff_getformat(const struct roff *r)
                   3297: {
                   3298:
                   3299:        return(r->format);
1.174     kristaps 3300: }
                   3301:
                   3302: /*
1.207     schwarze 3303:  * Find out whether a line is a macro line or not.
1.174     kristaps 3304:  * If it is, adjust the current position and return one; if it isn't,
                   3305:  * return zero and don't change the current position.
                   3306:  * If the control character has been set with `.cc', then let that grain
                   3307:  * precedence.
                   3308:  * This is slighly contrary to groff, where using the non-breaking
                   3309:  * control character when `cc' has been invoked will cause the
                   3310:  * non-breaking macro contents to be printed verbatim.
                   3311:  */
                   3312: int
                   3313: roff_getcontrol(const struct roff *r, const char *cp, int *ppos)
                   3314: {
                   3315:        int             pos;
                   3316:
                   3317:        pos = *ppos;
                   3318:
                   3319:        if (0 != r->control && cp[pos] == r->control)
                   3320:                pos++;
                   3321:        else if (0 != r->control)
                   3322:                return(0);
                   3323:        else if ('\\' == cp[pos] && '.' == cp[pos + 1])
                   3324:                pos += 2;
                   3325:        else if ('.' == cp[pos] || '\'' == cp[pos])
                   3326:                pos++;
                   3327:        else
                   3328:                return(0);
                   3329:
                   3330:        while (' ' == cp[pos] || '\t' == cp[pos])
                   3331:                pos++;
                   3332:
                   3333:        *ppos = pos;
                   3334:        return(1);
1.74      kristaps 3335: }

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