Annotation of mandoc/roff.c, Revision 1.334
1.334 ! schwarze 1: /* $Id: roff.c,v 1.333 2018/08/18 02:08:27 schwarze Exp $ */
1.1 kristaps 2: /*
1.267 schwarze 3: * Copyright (c) 2008-2012, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
1.325 schwarze 4: * Copyright (c) 2010-2015, 2017, 2018 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>
1.295 schwarze 25: #include <stddef.h>
26: #include <stdint.h>
1.178 schwarze 27: #include <stdio.h>
1.1 kristaps 28: #include <stdlib.h>
1.67 kristaps 29: #include <string.h>
1.1 kristaps 30:
1.67 kristaps 31: #include "mandoc.h"
1.201 schwarze 32: #include "mandoc_aux.h"
1.295 schwarze 33: #include "mandoc_ohash.h"
1.265 schwarze 34: #include "roff.h"
1.226 schwarze 35: #include "libmandoc.h"
1.266 schwarze 36: #include "roff_int.h"
1.109 kristaps 37: #include "libroff.h"
1.82 kristaps 38:
1.170 schwarze 39: /* Maximum number of string expansions per line, to break infinite loops. */
40: #define EXPAND_LIMIT 1000
41:
1.315 schwarze 42: /* Types of definitions of macros and strings. */
43: #define ROFFDEF_USER (1 << 1) /* User-defined. */
44: #define ROFFDEF_PRE (1 << 2) /* Predefined. */
45: #define ROFFDEF_REN (1 << 3) /* Renamed standard macro. */
46: #define ROFFDEF_STD (1 << 4) /* mdoc(7) or man(7) macro. */
47: #define ROFFDEF_ANY (ROFFDEF_USER | ROFFDEF_PRE | \
48: ROFFDEF_REN | ROFFDEF_STD)
1.325 schwarze 49: #define ROFFDEF_UNDEF (1 << 5) /* Completely undefined. */
1.315 schwarze 50:
1.266 schwarze 51: /* --- data types --------------------------------------------------------- */
52:
1.147 kristaps 53: /*
1.167 kristaps 54: * An incredibly-simple string buffer.
55: */
1.94 kristaps 56: struct roffstr {
1.167 kristaps 57: char *p; /* nil-terminated buffer */
58: size_t sz; /* saved strlen(p) */
1.166 kristaps 59: };
60:
61: /*
1.167 kristaps 62: * A key-value roffstr pair as part of a singly-linked list.
1.166 kristaps 63: */
64: struct roffkv {
65: struct roffstr key;
66: struct roffstr val;
67: struct roffkv *next; /* next in list */
1.94 kristaps 68: };
69:
1.180 schwarze 70: /*
71: * A single number register as part of a singly-linked list.
72: */
73: struct roffreg {
74: struct roffstr key;
1.181 schwarze 75: int val;
1.327 schwarze 76: int step;
1.180 schwarze 77: struct roffreg *next;
78: };
79:
1.295 schwarze 80: /*
81: * Association of request and macro names with token IDs.
82: */
83: struct roffreq {
84: enum roff_tok tok;
85: char name[];
86: };
87:
1.67 kristaps 88: struct roff {
1.128 kristaps 89: struct mparse *parse; /* parse point */
1.296 schwarze 90: struct roff_man *man; /* mdoc or man parser */
1.67 kristaps 91: struct roffnode *last; /* leaf of stack */
1.223 schwarze 92: int *rstack; /* stack of inverted `ie' values */
1.295 schwarze 93: struct ohash *reqtab; /* request lookup table */
1.180 schwarze 94: struct roffreg *regtab; /* number registers */
1.166 kristaps 95: struct roffkv *strtab; /* user-defined strings & macros */
1.306 schwarze 96: struct roffkv *rentab; /* renamed strings & macros */
1.167 kristaps 97: struct roffkv *xmbtab; /* multi-byte trans table (`tr') */
98: struct roffstr *xtab; /* single-byte trans table (`tr') */
1.106 kristaps 99: const char *current_string; /* value of last called user macro */
1.118 kristaps 100: struct tbl_node *first_tbl; /* first table parsed */
101: struct tbl_node *last_tbl; /* last table parsed */
102: struct tbl_node *tbl; /* current table being parsed */
1.319 schwarze 103: struct eqn_node *last_eqn; /* equation parser */
104: struct eqn_node *eqn; /* active equation parser */
1.230 schwarze 105: int eqn_inline; /* current equation is inline */
1.223 schwarze 106: int options; /* parse options */
107: int rstacksz; /* current size limit of rstack */
108: int rstackpos; /* position in rstack */
1.227 schwarze 109: int format; /* current file in mdoc or man format */
1.273 schwarze 110: int argc; /* number of args of the last macro */
1.223 schwarze 111: char control; /* control character */
1.303 schwarze 112: char escape; /* escape character */
1.79 kristaps 113: };
114:
1.67 kristaps 115: struct roffnode {
1.294 schwarze 116: enum roff_tok tok; /* type of node */
1.67 kristaps 117: struct roffnode *parent; /* up one in stack */
118: int line; /* parse line */
119: int col; /* parse col */
1.106 kristaps 120: char *name; /* node name, e.g. macro name */
1.79 kristaps 121: char *end; /* end-rules: custom token */
122: int endspan; /* end-rules: next-line or infty */
1.198 schwarze 123: int rule; /* current evaluation rule */
1.67 kristaps 124: };
125:
126: #define ROFF_ARGS struct roff *r, /* parse ctx */ \
1.294 schwarze 127: enum roff_tok tok, /* tok of macro */ \
1.238 schwarze 128: struct buf *buf, /* input buffer */ \
1.67 kristaps 129: int ln, /* parse line */ \
1.75 kristaps 130: int ppos, /* original pos in buffer */ \
131: int pos, /* current pos in buffer */ \
1.74 kristaps 132: int *offs /* reset offset of buffer data */
1.67 kristaps 133:
134: typedef enum rofferr (*roffproc)(ROFF_ARGS);
135:
136: struct roffmac {
1.79 kristaps 137: roffproc proc; /* process new macro */
138: roffproc text; /* process as child text of macro */
139: roffproc sub; /* process as child of macro */
140: int flags;
141: #define ROFFMAC_STRUCT (1 << 0) /* always interpret */
1.67 kristaps 142: };
143:
1.141 kristaps 144: struct predef {
145: const char *name; /* predefined input name */
146: const char *str; /* replacement symbol */
147: };
148:
149: #define PREDEF(__name, __str) \
150: { (__name), (__str) },
151:
1.266 schwarze 152: /* --- function prototypes ------------------------------------------------ */
153:
1.155 kristaps 154: static void roffnode_cleanscope(struct roff *);
155: static void roffnode_pop(struct roff *);
1.294 schwarze 156: static void roffnode_push(struct roff *, enum roff_tok,
1.155 kristaps 157: const char *, int, int);
1.321 schwarze 158: static void roff_addtbl(struct roff_man *, struct tbl_node *);
1.311 schwarze 159: static enum rofferr roff_als(ROFF_ARGS);
1.80 kristaps 160: static enum rofferr roff_block(ROFF_ARGS);
161: static enum rofferr roff_block_text(ROFF_ARGS);
162: static enum rofferr roff_block_sub(ROFF_ARGS);
1.296 schwarze 163: static enum rofferr roff_br(ROFF_ARGS);
1.80 kristaps 164: static enum rofferr roff_cblock(ROFF_ARGS);
1.174 kristaps 165: static enum rofferr roff_cc(ROFF_ARGS);
1.195 schwarze 166: static void roff_ccond(struct roff *, int, int);
1.82 kristaps 167: static enum rofferr roff_cond(ROFF_ARGS);
168: static enum rofferr roff_cond_text(ROFF_ARGS);
169: static enum rofferr roff_cond_sub(ROFF_ARGS);
1.92 schwarze 170: static enum rofferr roff_ds(ROFF_ARGS);
1.303 schwarze 171: static enum rofferr roff_ec(ROFF_ARGS);
172: static enum rofferr roff_eo(ROFF_ARGS);
1.238 schwarze 173: static enum rofferr roff_eqndelim(struct roff *, struct buf *, int);
1.271 schwarze 174: static int roff_evalcond(struct roff *r, int, char *, int *);
1.234 kristaps 175: static int roff_evalnum(struct roff *, int,
176: const char *, int *, int *, int);
177: static int roff_evalpar(struct roff *, int,
1.261 schwarze 178: const char *, int *, int *, int);
1.198 schwarze 179: static int roff_evalstrcond(const char *, int *);
1.155 kristaps 180: static void roff_free1(struct roff *);
1.180 schwarze 181: static void roff_freereg(struct roffreg *);
1.167 kristaps 182: static void roff_freestr(struct roffkv *);
1.212 schwarze 183: static size_t roff_getname(struct roff *, char **, int, int);
1.261 schwarze 184: static int roff_getnum(const char *, int *, int *, int);
1.184 schwarze 185: static int roff_getop(const char *, int *, char *);
1.327 schwarze 186: static int roff_getregn(struct roff *,
187: const char *, size_t, char);
1.273 schwarze 188: static int roff_getregro(const struct roff *,
189: const char *name);
1.325 schwarze 190: static const char *roff_getstrn(struct roff *,
1.315 schwarze 191: const char *, size_t, int *);
1.271 schwarze 192: static int roff_hasregn(const struct roff *,
193: const char *, size_t);
1.251 schwarze 194: static enum rofferr roff_insec(ROFF_ARGS);
1.178 schwarze 195: static enum rofferr roff_it(ROFF_ARGS);
1.103 kristaps 196: static enum rofferr roff_line_ignore(ROFF_ARGS);
1.265 schwarze 197: static void roff_man_alloc1(struct roff_man *);
198: static void roff_man_free1(struct roff_man *);
1.300 schwarze 199: static enum rofferr roff_manyarg(ROFF_ARGS);
1.330 schwarze 200: static enum rofferr roff_nop(ROFF_ARGS);
1.89 kristaps 201: static enum rofferr roff_nr(ROFF_ARGS);
1.297 schwarze 202: static enum rofferr roff_onearg(ROFF_ARGS);
1.294 schwarze 203: static enum roff_tok roff_parse(struct roff *, char *, int *,
1.214 schwarze 204: int, int);
1.305 schwarze 205: static enum rofferr roff_parsetext(struct roff *, struct buf *,
206: int, int *);
1.306 schwarze 207: static enum rofferr roff_renamed(ROFF_ARGS);
1.238 schwarze 208: static enum rofferr roff_res(struct roff *, struct buf *, int, int);
1.122 schwarze 209: static enum rofferr roff_rm(ROFF_ARGS);
1.306 schwarze 210: static enum rofferr roff_rn(ROFF_ARGS);
1.203 schwarze 211: static enum rofferr roff_rr(ROFF_ARGS);
1.326 schwarze 212: static void roff_setregn(struct roff *, const char *,
1.327 schwarze 213: size_t, int, char, int);
1.94 kristaps 214: static void roff_setstr(struct roff *,
1.106 kristaps 215: const char *, const char *, int);
1.207 schwarze 216: static void roff_setstrn(struct roffkv **, const char *,
1.164 kristaps 217: size_t, const char *, size_t, int);
1.105 kristaps 218: static enum rofferr roff_so(ROFF_ARGS);
1.164 kristaps 219: static enum rofferr roff_tr(ROFF_ARGS);
1.175 schwarze 220: static enum rofferr roff_Dd(ROFF_ARGS);
1.109 kristaps 221: static enum rofferr roff_TE(ROFF_ARGS);
222: static enum rofferr roff_TS(ROFF_ARGS);
1.125 kristaps 223: static enum rofferr roff_EQ(ROFF_ARGS);
224: static enum rofferr roff_EN(ROFF_ARGS);
1.112 kristaps 225: static enum rofferr roff_T_(ROFF_ARGS);
1.251 schwarze 226: static enum rofferr roff_unsupp(ROFF_ARGS);
1.106 kristaps 227: static enum rofferr roff_userdef(ROFF_ARGS);
1.67 kristaps 228:
1.266 schwarze 229: /* --- constant data ------------------------------------------------------ */
230:
1.261 schwarze 231: #define ROFFNUM_SCALE (1 << 0) /* Honour scaling in roff_getnum(). */
232: #define ROFFNUM_WHITE (1 << 1) /* Skip whitespace in roff_evalnum(). */
233:
1.294 schwarze 234: const char *__roff_name[MAN_MAX + 1] = {
1.305 schwarze 235: "br", "ce", "ft", "ll",
1.312 schwarze 236: "mc", "po", "rj", "sp",
237: "ta", "ti", NULL,
1.294 schwarze 238: "ab", "ad", "af", "aln",
239: "als", "am", "am1", "ami",
240: "ami1", "as", "as1", "asciify",
241: "backtrace", "bd", "bleedat", "blm",
242: "box", "boxa", "bp", "BP",
243: "break", "breakchar", "brnl", "brp",
1.305 schwarze 244: "brpnl", "c2", "cc",
1.294 schwarze 245: "cf", "cflags", "ch", "char",
246: "chop", "class", "close", "CL",
247: "color", "composite", "continue", "cp",
248: "cropat", "cs", "cu", "da",
249: "dch", "Dd", "de", "de1",
250: "defcolor", "dei", "dei1", "device",
251: "devicem", "di", "do", "ds",
252: "ds1", "dwh", "dt", "ec",
253: "ecr", "ecs", "el", "em",
254: "EN", "eo", "EP", "EQ",
255: "errprint", "ev", "evc", "ex",
256: "fallback", "fam", "fc", "fchar",
257: "fcolor", "fdeferlig", "feature", "fkern",
258: "fl", "flig", "fp", "fps",
259: "fschar", "fspacewidth", "fspecial", "ftr",
260: "fzoom", "gcolor", "hc", "hcode",
261: "hidechar", "hla", "hlm", "hpf",
262: "hpfa", "hpfcode", "hw", "hy",
263: "hylang", "hylen", "hym", "hypp",
264: "hys", "ie", "if", "ig",
265: "index", "it", "itc", "IX",
266: "kern", "kernafter", "kernbefore", "kernpair",
267: "lc", "lc_ctype", "lds", "length",
268: "letadj", "lf", "lg", "lhang",
269: "linetabs", "lnr", "lnrf", "lpfx",
1.304 schwarze 270: "ls", "lsm", "lt",
1.294 schwarze 271: "mediasize", "minss", "mk", "mso",
272: "na", "ne", "nh", "nhychar",
273: "nm", "nn", "nop", "nr",
274: "nrf", "nroff", "ns", "nx",
275: "open", "opena", "os", "output",
276: "padj", "papersize", "pc", "pev",
277: "pi", "PI", "pl", "pm",
1.312 schwarze 278: "pn", "pnr", "ps",
1.294 schwarze 279: "psbb", "pshape", "pso", "ptr",
280: "pvs", "rchar", "rd", "recursionlimit",
1.309 schwarze 281: "return", "rfschar", "rhang",
1.294 schwarze 282: "rm", "rn", "rnn", "rr",
283: "rs", "rt", "schar", "sentchar",
284: "shc", "shift", "sizes", "so",
285: "spacewidth", "special", "spreadwarn", "ss",
286: "sty", "substring", "sv", "sy",
1.300 schwarze 287: "T&", "tc", "TE",
1.301 schwarze 288: "TH", "tkf", "tl",
1.294 schwarze 289: "tm", "tm1", "tmc", "tr",
290: "track", "transchar", "trf", "trimat",
291: "trin", "trnt", "troff", "TS",
292: "uf", "ul", "unformat", "unwatch",
293: "unwatchn", "vpt", "vs", "warn",
294: "warnscale", "watch", "watchlength", "watchn",
295: "wh", "while", "write", "writec",
296: "writem", "xflag", ".", NULL,
1.306 schwarze 297: NULL, "text",
1.294 schwarze 298: "Dd", "Dt", "Os", "Sh",
299: "Ss", "Pp", "D1", "Dl",
300: "Bd", "Ed", "Bl", "El",
301: "It", "Ad", "An", "Ap",
302: "Ar", "Cd", "Cm", "Dv",
303: "Er", "Ev", "Ex", "Fa",
304: "Fd", "Fl", "Fn", "Ft",
305: "Ic", "In", "Li", "Nd",
306: "Nm", "Op", "Ot", "Pa",
307: "Rv", "St", "Va", "Vt",
308: "Xr", "%A", "%B", "%D",
309: "%I", "%J", "%N", "%O",
310: "%P", "%R", "%T", "%V",
311: "Ac", "Ao", "Aq", "At",
312: "Bc", "Bf", "Bo", "Bq",
313: "Bsx", "Bx", "Db", "Dc",
314: "Do", "Dq", "Ec", "Ef",
315: "Em", "Eo", "Fx", "Ms",
316: "No", "Ns", "Nx", "Ox",
317: "Pc", "Pf", "Po", "Pq",
318: "Qc", "Ql", "Qo", "Qq",
319: "Re", "Rs", "Sc", "So",
320: "Sq", "Sm", "Sx", "Sy",
321: "Tn", "Ux", "Xc", "Xo",
322: "Fo", "Fc", "Oo", "Oc",
323: "Bk", "Ek", "Bt", "Hf",
324: "Fr", "Ud", "Lb", "Lp",
325: "Lk", "Mt", "Brq", "Bro",
326: "Brc", "%C", "Es", "En",
1.299 schwarze 327: "Dx", "%Q", "%U", "Ta",
328: NULL,
1.294 schwarze 329: "TH", "SH", "SS", "TP",
1.332 schwarze 330: "TQ",
1.294 schwarze 331: "LP", "PP", "P", "IP",
332: "HP", "SM", "SB", "BI",
333: "IB", "BR", "RB", "R",
334: "B", "I", "IR", "RI",
1.299 schwarze 335: "nf", "fi",
1.294 schwarze 336: "RE", "RS", "DT", "UC",
1.297 schwarze 337: "PD", "AT", "in",
1.333 schwarze 338: "SY", "YS", "OP",
339: "EX", "EE", "UR",
1.317 schwarze 340: "UE", "MT", "ME", NULL
1.294 schwarze 341: };
342: const char *const *roff_name = __roff_name;
343:
344: static struct roffmac roffs[TOKEN_NONE] = {
1.296 schwarze 345: { roff_br, NULL, NULL, 0 }, /* br */
1.305 schwarze 346: { roff_onearg, NULL, NULL, 0 }, /* ce */
1.297 schwarze 347: { roff_onearg, NULL, NULL, 0 }, /* ft */
1.298 schwarze 348: { roff_onearg, NULL, NULL, 0 }, /* ll */
1.304 schwarze 349: { roff_onearg, NULL, NULL, 0 }, /* mc */
1.312 schwarze 350: { roff_onearg, NULL, NULL, 0 }, /* po */
1.309 schwarze 351: { roff_onearg, NULL, NULL, 0 }, /* rj */
1.299 schwarze 352: { roff_onearg, NULL, NULL, 0 }, /* sp */
1.300 schwarze 353: { roff_manyarg, NULL, NULL, 0 }, /* ta */
1.301 schwarze 354: { roff_onearg, NULL, NULL, 0 }, /* ti */
1.296 schwarze 355: { NULL, NULL, NULL, 0 }, /* ROFF_MAX */
1.295 schwarze 356: { roff_unsupp, NULL, NULL, 0 }, /* ab */
357: { roff_line_ignore, NULL, NULL, 0 }, /* ad */
358: { roff_line_ignore, NULL, NULL, 0 }, /* af */
359: { roff_unsupp, NULL, NULL, 0 }, /* aln */
1.311 schwarze 360: { roff_als, NULL, NULL, 0 }, /* als */
1.295 schwarze 361: { roff_block, roff_block_text, roff_block_sub, 0 }, /* am */
362: { roff_block, roff_block_text, roff_block_sub, 0 }, /* am1 */
363: { roff_block, roff_block_text, roff_block_sub, 0 }, /* ami */
364: { roff_block, roff_block_text, roff_block_sub, 0 }, /* ami1 */
365: { roff_ds, NULL, NULL, 0 }, /* as */
366: { roff_ds, NULL, NULL, 0 }, /* as1 */
367: { roff_unsupp, NULL, NULL, 0 }, /* asciify */
368: { roff_line_ignore, NULL, NULL, 0 }, /* backtrace */
369: { roff_line_ignore, NULL, NULL, 0 }, /* bd */
370: { roff_line_ignore, NULL, NULL, 0 }, /* bleedat */
371: { roff_unsupp, NULL, NULL, 0 }, /* blm */
372: { roff_unsupp, NULL, NULL, 0 }, /* box */
373: { roff_unsupp, NULL, NULL, 0 }, /* boxa */
374: { roff_line_ignore, NULL, NULL, 0 }, /* bp */
375: { roff_unsupp, NULL, NULL, 0 }, /* BP */
376: { roff_unsupp, NULL, NULL, 0 }, /* break */
377: { roff_line_ignore, NULL, NULL, 0 }, /* breakchar */
378: { roff_line_ignore, NULL, NULL, 0 }, /* brnl */
1.296 schwarze 379: { roff_br, NULL, NULL, 0 }, /* brp */
1.295 schwarze 380: { roff_line_ignore, NULL, NULL, 0 }, /* brpnl */
381: { roff_unsupp, NULL, NULL, 0 }, /* c2 */
382: { roff_cc, NULL, NULL, 0 }, /* cc */
383: { roff_insec, NULL, NULL, 0 }, /* cf */
384: { roff_line_ignore, NULL, NULL, 0 }, /* cflags */
385: { roff_line_ignore, NULL, NULL, 0 }, /* ch */
386: { roff_unsupp, NULL, NULL, 0 }, /* char */
387: { roff_unsupp, NULL, NULL, 0 }, /* chop */
388: { roff_line_ignore, NULL, NULL, 0 }, /* class */
389: { roff_insec, NULL, NULL, 0 }, /* close */
390: { roff_unsupp, NULL, NULL, 0 }, /* CL */
391: { roff_line_ignore, NULL, NULL, 0 }, /* color */
392: { roff_unsupp, NULL, NULL, 0 }, /* composite */
393: { roff_unsupp, NULL, NULL, 0 }, /* continue */
394: { roff_line_ignore, NULL, NULL, 0 }, /* cp */
395: { roff_line_ignore, NULL, NULL, 0 }, /* cropat */
396: { roff_line_ignore, NULL, NULL, 0 }, /* cs */
397: { roff_line_ignore, NULL, NULL, 0 }, /* cu */
398: { roff_unsupp, NULL, NULL, 0 }, /* da */
399: { roff_unsupp, NULL, NULL, 0 }, /* dch */
400: { roff_Dd, NULL, NULL, 0 }, /* Dd */
401: { roff_block, roff_block_text, roff_block_sub, 0 }, /* de */
402: { roff_block, roff_block_text, roff_block_sub, 0 }, /* de1 */
403: { roff_line_ignore, NULL, NULL, 0 }, /* defcolor */
404: { roff_block, roff_block_text, roff_block_sub, 0 }, /* dei */
405: { roff_block, roff_block_text, roff_block_sub, 0 }, /* dei1 */
406: { roff_unsupp, NULL, NULL, 0 }, /* device */
407: { roff_unsupp, NULL, NULL, 0 }, /* devicem */
408: { roff_unsupp, NULL, NULL, 0 }, /* di */
409: { roff_unsupp, NULL, NULL, 0 }, /* do */
410: { roff_ds, NULL, NULL, 0 }, /* ds */
411: { roff_ds, NULL, NULL, 0 }, /* ds1 */
412: { roff_unsupp, NULL, NULL, 0 }, /* dwh */
413: { roff_unsupp, NULL, NULL, 0 }, /* dt */
1.303 schwarze 414: { roff_ec, NULL, NULL, 0 }, /* ec */
1.295 schwarze 415: { roff_unsupp, NULL, NULL, 0 }, /* ecr */
416: { roff_unsupp, NULL, NULL, 0 }, /* ecs */
417: { roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT }, /* el */
418: { roff_unsupp, NULL, NULL, 0 }, /* em */
419: { roff_EN, NULL, NULL, 0 }, /* EN */
1.303 schwarze 420: { roff_eo, NULL, NULL, 0 }, /* eo */
1.295 schwarze 421: { roff_unsupp, NULL, NULL, 0 }, /* EP */
422: { roff_EQ, NULL, NULL, 0 }, /* EQ */
423: { roff_line_ignore, NULL, NULL, 0 }, /* errprint */
424: { roff_unsupp, NULL, NULL, 0 }, /* ev */
425: { roff_unsupp, NULL, NULL, 0 }, /* evc */
426: { roff_unsupp, NULL, NULL, 0 }, /* ex */
427: { roff_line_ignore, NULL, NULL, 0 }, /* fallback */
428: { roff_line_ignore, NULL, NULL, 0 }, /* fam */
429: { roff_unsupp, NULL, NULL, 0 }, /* fc */
430: { roff_unsupp, NULL, NULL, 0 }, /* fchar */
431: { roff_line_ignore, NULL, NULL, 0 }, /* fcolor */
432: { roff_line_ignore, NULL, NULL, 0 }, /* fdeferlig */
433: { roff_line_ignore, NULL, NULL, 0 }, /* feature */
434: { roff_line_ignore, NULL, NULL, 0 }, /* fkern */
435: { roff_line_ignore, NULL, NULL, 0 }, /* fl */
436: { roff_line_ignore, NULL, NULL, 0 }, /* flig */
437: { roff_line_ignore, NULL, NULL, 0 }, /* fp */
438: { roff_line_ignore, NULL, NULL, 0 }, /* fps */
439: { roff_unsupp, NULL, NULL, 0 }, /* fschar */
440: { roff_line_ignore, NULL, NULL, 0 }, /* fspacewidth */
441: { roff_line_ignore, NULL, NULL, 0 }, /* fspecial */
442: { roff_line_ignore, NULL, NULL, 0 }, /* ftr */
443: { roff_line_ignore, NULL, NULL, 0 }, /* fzoom */
444: { roff_line_ignore, NULL, NULL, 0 }, /* gcolor */
445: { roff_line_ignore, NULL, NULL, 0 }, /* hc */
446: { roff_line_ignore, NULL, NULL, 0 }, /* hcode */
447: { roff_line_ignore, NULL, NULL, 0 }, /* hidechar */
448: { roff_line_ignore, NULL, NULL, 0 }, /* hla */
449: { roff_line_ignore, NULL, NULL, 0 }, /* hlm */
450: { roff_line_ignore, NULL, NULL, 0 }, /* hpf */
451: { roff_line_ignore, NULL, NULL, 0 }, /* hpfa */
452: { roff_line_ignore, NULL, NULL, 0 }, /* hpfcode */
453: { roff_line_ignore, NULL, NULL, 0 }, /* hw */
454: { roff_line_ignore, NULL, NULL, 0 }, /* hy */
455: { roff_line_ignore, NULL, NULL, 0 }, /* hylang */
456: { roff_line_ignore, NULL, NULL, 0 }, /* hylen */
457: { roff_line_ignore, NULL, NULL, 0 }, /* hym */
458: { roff_line_ignore, NULL, NULL, 0 }, /* hypp */
459: { roff_line_ignore, NULL, NULL, 0 }, /* hys */
460: { roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT }, /* ie */
461: { roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT }, /* if */
462: { roff_block, roff_block_text, roff_block_sub, 0 }, /* ig */
463: { roff_unsupp, NULL, NULL, 0 }, /* index */
464: { roff_it, NULL, NULL, 0 }, /* it */
465: { roff_unsupp, NULL, NULL, 0 }, /* itc */
466: { roff_line_ignore, NULL, NULL, 0 }, /* IX */
467: { roff_line_ignore, NULL, NULL, 0 }, /* kern */
468: { roff_line_ignore, NULL, NULL, 0 }, /* kernafter */
469: { roff_line_ignore, NULL, NULL, 0 }, /* kernbefore */
470: { roff_line_ignore, NULL, NULL, 0 }, /* kernpair */
471: { roff_unsupp, NULL, NULL, 0 }, /* lc */
472: { roff_unsupp, NULL, NULL, 0 }, /* lc_ctype */
473: { roff_unsupp, NULL, NULL, 0 }, /* lds */
474: { roff_unsupp, NULL, NULL, 0 }, /* length */
475: { roff_line_ignore, NULL, NULL, 0 }, /* letadj */
476: { roff_insec, NULL, NULL, 0 }, /* lf */
477: { roff_line_ignore, NULL, NULL, 0 }, /* lg */
478: { roff_line_ignore, NULL, NULL, 0 }, /* lhang */
479: { roff_unsupp, NULL, NULL, 0 }, /* linetabs */
480: { roff_unsupp, NULL, NULL, 0 }, /* lnr */
481: { roff_unsupp, NULL, NULL, 0 }, /* lnrf */
482: { roff_unsupp, NULL, NULL, 0 }, /* lpfx */
483: { roff_line_ignore, NULL, NULL, 0 }, /* ls */
484: { roff_unsupp, NULL, NULL, 0 }, /* lsm */
485: { roff_line_ignore, NULL, NULL, 0 }, /* lt */
486: { roff_line_ignore, NULL, NULL, 0 }, /* mediasize */
487: { roff_line_ignore, NULL, NULL, 0 }, /* minss */
488: { roff_line_ignore, NULL, NULL, 0 }, /* mk */
489: { roff_insec, NULL, NULL, 0 }, /* mso */
490: { roff_line_ignore, NULL, NULL, 0 }, /* na */
491: { roff_line_ignore, NULL, NULL, 0 }, /* ne */
492: { roff_line_ignore, NULL, NULL, 0 }, /* nh */
493: { roff_line_ignore, NULL, NULL, 0 }, /* nhychar */
494: { roff_unsupp, NULL, NULL, 0 }, /* nm */
495: { roff_unsupp, NULL, NULL, 0 }, /* nn */
1.330 schwarze 496: { roff_nop, NULL, NULL, 0 }, /* nop */
1.295 schwarze 497: { roff_nr, NULL, NULL, 0 }, /* nr */
498: { roff_unsupp, NULL, NULL, 0 }, /* nrf */
499: { roff_line_ignore, NULL, NULL, 0 }, /* nroff */
500: { roff_line_ignore, NULL, NULL, 0 }, /* ns */
501: { roff_insec, NULL, NULL, 0 }, /* nx */
502: { roff_insec, NULL, NULL, 0 }, /* open */
503: { roff_insec, NULL, NULL, 0 }, /* opena */
504: { roff_line_ignore, NULL, NULL, 0 }, /* os */
505: { roff_unsupp, NULL, NULL, 0 }, /* output */
506: { roff_line_ignore, NULL, NULL, 0 }, /* padj */
507: { roff_line_ignore, NULL, NULL, 0 }, /* papersize */
508: { roff_line_ignore, NULL, NULL, 0 }, /* pc */
509: { roff_line_ignore, NULL, NULL, 0 }, /* pev */
510: { roff_insec, NULL, NULL, 0 }, /* pi */
511: { roff_unsupp, NULL, NULL, 0 }, /* PI */
512: { roff_line_ignore, NULL, NULL, 0 }, /* pl */
513: { roff_line_ignore, NULL, NULL, 0 }, /* pm */
514: { roff_line_ignore, NULL, NULL, 0 }, /* pn */
515: { roff_line_ignore, NULL, NULL, 0 }, /* pnr */
516: { roff_line_ignore, NULL, NULL, 0 }, /* ps */
517: { roff_unsupp, NULL, NULL, 0 }, /* psbb */
518: { roff_unsupp, NULL, NULL, 0 }, /* pshape */
519: { roff_insec, NULL, NULL, 0 }, /* pso */
520: { roff_line_ignore, NULL, NULL, 0 }, /* ptr */
521: { roff_line_ignore, NULL, NULL, 0 }, /* pvs */
522: { roff_unsupp, NULL, NULL, 0 }, /* rchar */
523: { roff_line_ignore, NULL, NULL, 0 }, /* rd */
524: { roff_line_ignore, NULL, NULL, 0 }, /* recursionlimit */
525: { roff_unsupp, NULL, NULL, 0 }, /* return */
526: { roff_unsupp, NULL, NULL, 0 }, /* rfschar */
527: { roff_line_ignore, NULL, NULL, 0 }, /* rhang */
528: { roff_rm, NULL, NULL, 0 }, /* rm */
1.306 schwarze 529: { roff_rn, NULL, NULL, 0 }, /* rn */
1.295 schwarze 530: { roff_unsupp, NULL, NULL, 0 }, /* rnn */
531: { roff_rr, NULL, NULL, 0 }, /* rr */
532: { roff_line_ignore, NULL, NULL, 0 }, /* rs */
533: { roff_line_ignore, NULL, NULL, 0 }, /* rt */
534: { roff_unsupp, NULL, NULL, 0 }, /* schar */
535: { roff_line_ignore, NULL, NULL, 0 }, /* sentchar */
536: { roff_line_ignore, NULL, NULL, 0 }, /* shc */
537: { roff_unsupp, NULL, NULL, 0 }, /* shift */
538: { roff_line_ignore, NULL, NULL, 0 }, /* sizes */
539: { roff_so, NULL, NULL, 0 }, /* so */
540: { roff_line_ignore, NULL, NULL, 0 }, /* spacewidth */
541: { roff_line_ignore, NULL, NULL, 0 }, /* special */
542: { roff_line_ignore, NULL, NULL, 0 }, /* spreadwarn */
543: { roff_line_ignore, NULL, NULL, 0 }, /* ss */
544: { roff_line_ignore, NULL, NULL, 0 }, /* sty */
545: { roff_unsupp, NULL, NULL, 0 }, /* substring */
546: { roff_line_ignore, NULL, NULL, 0 }, /* sv */
547: { roff_insec, NULL, NULL, 0 }, /* sy */
548: { roff_T_, NULL, NULL, 0 }, /* T& */
549: { roff_unsupp, NULL, NULL, 0 }, /* tc */
550: { roff_TE, NULL, NULL, 0 }, /* TE */
1.315 schwarze 551: { roff_Dd, NULL, NULL, 0 }, /* TH */
1.295 schwarze 552: { roff_line_ignore, NULL, NULL, 0 }, /* tkf */
553: { roff_unsupp, NULL, NULL, 0 }, /* tl */
554: { roff_line_ignore, NULL, NULL, 0 }, /* tm */
555: { roff_line_ignore, NULL, NULL, 0 }, /* tm1 */
556: { roff_line_ignore, NULL, NULL, 0 }, /* tmc */
557: { roff_tr, NULL, NULL, 0 }, /* tr */
558: { roff_line_ignore, NULL, NULL, 0 }, /* track */
559: { roff_line_ignore, NULL, NULL, 0 }, /* transchar */
560: { roff_insec, NULL, NULL, 0 }, /* trf */
561: { roff_line_ignore, NULL, NULL, 0 }, /* trimat */
562: { roff_unsupp, NULL, NULL, 0 }, /* trin */
563: { roff_unsupp, NULL, NULL, 0 }, /* trnt */
564: { roff_line_ignore, NULL, NULL, 0 }, /* troff */
565: { roff_TS, NULL, NULL, 0 }, /* TS */
566: { roff_line_ignore, NULL, NULL, 0 }, /* uf */
567: { roff_line_ignore, NULL, NULL, 0 }, /* ul */
568: { roff_unsupp, NULL, NULL, 0 }, /* unformat */
569: { roff_line_ignore, NULL, NULL, 0 }, /* unwatch */
570: { roff_line_ignore, NULL, NULL, 0 }, /* unwatchn */
571: { roff_line_ignore, NULL, NULL, 0 }, /* vpt */
572: { roff_line_ignore, NULL, NULL, 0 }, /* vs */
573: { roff_line_ignore, NULL, NULL, 0 }, /* warn */
574: { roff_line_ignore, NULL, NULL, 0 }, /* warnscale */
575: { roff_line_ignore, NULL, NULL, 0 }, /* watch */
576: { roff_line_ignore, NULL, NULL, 0 }, /* watchlength */
577: { roff_line_ignore, NULL, NULL, 0 }, /* watchn */
578: { roff_unsupp, NULL, NULL, 0 }, /* wh */
579: { roff_unsupp, NULL, NULL, 0 }, /* while */
580: { roff_insec, NULL, NULL, 0 }, /* write */
581: { roff_insec, NULL, NULL, 0 }, /* writec */
582: { roff_insec, NULL, NULL, 0 }, /* writem */
583: { roff_line_ignore, NULL, NULL, 0 }, /* xflag */
584: { roff_cblock, NULL, NULL, 0 }, /* . */
1.306 schwarze 585: { roff_renamed, NULL, NULL, 0 },
1.295 schwarze 586: { roff_userdef, NULL, NULL, 0 }
1.67 kristaps 587: };
588:
1.141 kristaps 589: /* Array of injected predefined strings. */
590: #define PREDEFS_MAX 38
591: static const struct predef predefs[PREDEFS_MAX] = {
592: #include "predefs.in"
593: };
594:
1.305 schwarze 595: static int roffce_lines; /* number of input lines to center */
596: static struct roff_node *roffce_node; /* active request */
1.178 schwarze 597: static int roffit_lines; /* number of lines to delay */
598: static char *roffit_macro; /* nil-terminated macro line */
599:
1.207 schwarze 600:
1.266 schwarze 601: /* --- request table ------------------------------------------------------ */
602:
1.295 schwarze 603: struct ohash *
604: roffhash_alloc(enum roff_tok mintok, enum roff_tok maxtok)
1.85 kristaps 605: {
1.295 schwarze 606: struct ohash *htab;
607: struct roffreq *req;
608: enum roff_tok tok;
609: size_t sz;
610: unsigned int slot;
1.85 kristaps 611:
1.295 schwarze 612: htab = mandoc_malloc(sizeof(*htab));
613: mandoc_ohash_init(htab, 8, offsetof(struct roffreq, name));
1.85 kristaps 614:
1.295 schwarze 615: for (tok = mintok; tok < maxtok; tok++) {
1.296 schwarze 616: if (roff_name[tok] == NULL)
617: continue;
1.295 schwarze 618: sz = strlen(roff_name[tok]);
619: req = mandoc_malloc(sizeof(*req) + sz + 1);
620: req->tok = tok;
621: memcpy(req->name, roff_name[tok], sz + 1);
622: slot = ohash_qlookup(htab, req->name);
623: ohash_insert(htab, slot, req);
1.85 kristaps 624: }
1.295 schwarze 625: return htab;
1.85 kristaps 626: }
627:
1.295 schwarze 628: void
629: roffhash_free(struct ohash *htab)
1.67 kristaps 630: {
1.295 schwarze 631: struct roffreq *req;
632: unsigned int slot;
1.67 kristaps 633:
1.295 schwarze 634: if (htab == NULL)
635: return;
636: for (req = ohash_first(htab, &slot); req != NULL;
637: req = ohash_next(htab, &slot))
638: free(req);
639: ohash_delete(htab);
640: free(htab);
641: }
642:
643: enum roff_tok
644: roffhash_find(struct ohash *htab, const char *name, size_t sz)
645: {
646: struct roffreq *req;
647: const char *end;
648:
649: if (sz) {
650: end = name + sz;
651: req = ohash_find(htab, ohash_qlookupi(htab, name, &end));
652: } else
653: req = ohash_find(htab, ohash_qlookup(htab, name));
654: return req == NULL ? TOKEN_NONE : req->tok;
1.67 kristaps 655: }
656:
1.266 schwarze 657: /* --- stack of request blocks -------------------------------------------- */
658:
1.67 kristaps 659: /*
660: * Pop the current node off of the stack of roff instructions currently
661: * pending.
662: */
663: static void
664: roffnode_pop(struct roff *r)
665: {
666: struct roffnode *p;
667:
1.75 kristaps 668: assert(r->last);
1.207 schwarze 669: p = r->last;
1.82 kristaps 670:
1.75 kristaps 671: r->last = r->last->parent;
1.106 kristaps 672: free(p->name);
673: free(p->end);
1.67 kristaps 674: free(p);
675: }
676:
677: /*
678: * Push a roff node onto the instruction stack. This must later be
679: * removed with roffnode_pop().
680: */
1.98 schwarze 681: static void
1.294 schwarze 682: roffnode_push(struct roff *r, enum roff_tok tok, const char *name,
1.106 kristaps 683: int line, int col)
1.67 kristaps 684: {
685: struct roffnode *p;
686:
1.98 schwarze 687: p = mandoc_calloc(1, sizeof(struct roffnode));
1.67 kristaps 688: p->tok = tok;
1.106 kristaps 689: if (name)
690: p->name = mandoc_strdup(name);
1.67 kristaps 691: p->parent = r->last;
692: p->line = line;
693: p->col = col;
1.198 schwarze 694: p->rule = p->parent ? p->parent->rule : 0;
1.67 kristaps 695:
696: r->last = p;
697: }
698:
1.266 schwarze 699: /* --- roff parser state data management ---------------------------------- */
700:
1.67 kristaps 701: static void
702: roff_free1(struct roff *r)
703: {
1.176 schwarze 704: struct tbl_node *tbl;
1.167 kristaps 705: int i;
1.67 kristaps 706:
1.176 schwarze 707: while (NULL != (tbl = r->first_tbl)) {
708: r->first_tbl = tbl->next;
709: tbl_free(tbl);
1.109 kristaps 710: }
1.113 kristaps 711: r->first_tbl = r->last_tbl = r->tbl = NULL;
712:
1.319 schwarze 713: if (r->last_eqn != NULL)
714: eqn_free(r->last_eqn);
715: r->last_eqn = r->eqn = NULL;
1.125 kristaps 716:
1.67 kristaps 717: while (r->last)
718: roffnode_pop(r);
1.109 kristaps 719:
1.223 schwarze 720: free (r->rstack);
721: r->rstack = NULL;
722: r->rstacksz = 0;
723: r->rstackpos = -1;
724:
725: roff_freereg(r->regtab);
726: r->regtab = NULL;
727:
1.167 kristaps 728: roff_freestr(r->strtab);
1.306 schwarze 729: roff_freestr(r->rentab);
1.167 kristaps 730: roff_freestr(r->xmbtab);
1.306 schwarze 731: r->strtab = r->rentab = r->xmbtab = NULL;
1.167 kristaps 732:
733: if (r->xtab)
734: for (i = 0; i < 128; i++)
735: free(r->xtab[i].p);
736: free(r->xtab);
737: r->xtab = NULL;
1.67 kristaps 738: }
739:
740: void
741: roff_reset(struct roff *r)
742: {
743: roff_free1(r);
1.227 schwarze 744: r->format = r->options & (MPARSE_MDOC | MPARSE_MAN);
1.303 schwarze 745: r->control = '\0';
746: r->escape = '\\';
1.307 schwarze 747: roffce_lines = 0;
748: roffce_node = NULL;
749: roffit_lines = 0;
750: roffit_macro = NULL;
1.67 kristaps 751: }
752:
753: void
754: roff_free(struct roff *r)
755: {
756: roff_free1(r);
1.295 schwarze 757: roffhash_free(r->reqtab);
1.67 kristaps 758: free(r);
759: }
760:
761: struct roff *
1.279 schwarze 762: roff_alloc(struct mparse *parse, int options)
1.67 kristaps 763: {
764: struct roff *r;
765:
1.98 schwarze 766: r = mandoc_calloc(1, sizeof(struct roff));
1.128 kristaps 767: r->parse = parse;
1.328 schwarze 768: r->reqtab = roffhash_alloc(0, ROFF_RENAMED);
1.199 schwarze 769: r->options = options;
1.227 schwarze 770: r->format = options & (MPARSE_MDOC | MPARSE_MAN);
1.82 kristaps 771: r->rstackpos = -1;
1.303 schwarze 772: r->escape = '\\';
1.277 schwarze 773: return r;
1.265 schwarze 774: }
775:
1.266 schwarze 776: /* --- syntax tree state data management ---------------------------------- */
777:
1.265 schwarze 778: static void
779: roff_man_free1(struct roff_man *man)
780: {
781:
1.266 schwarze 782: if (man->first != NULL)
783: roff_node_delete(man, man->first);
1.265 schwarze 784: free(man->meta.msec);
785: free(man->meta.vol);
786: free(man->meta.os);
787: free(man->meta.arch);
788: free(man->meta.title);
789: free(man->meta.name);
790: free(man->meta.date);
791: }
792:
793: static void
794: roff_man_alloc1(struct roff_man *man)
795: {
796:
797: memset(&man->meta, 0, sizeof(man->meta));
798: man->first = mandoc_calloc(1, sizeof(*man->first));
799: man->first->type = ROFFT_ROOT;
800: man->last = man->first;
801: man->last_es = NULL;
802: man->flags = 0;
803: man->macroset = MACROSET_NONE;
804: man->lastsec = man->lastnamed = SEC_NONE;
805: man->next = ROFF_NEXT_CHILD;
806: }
807:
808: void
809: roff_man_reset(struct roff_man *man)
810: {
811:
812: roff_man_free1(man);
813: roff_man_alloc1(man);
814: }
815:
816: void
817: roff_man_free(struct roff_man *man)
818: {
819:
820: roff_man_free1(man);
821: free(man);
822: }
823:
824: struct roff_man *
825: roff_man_alloc(struct roff *roff, struct mparse *parse,
1.316 schwarze 826: const char *os_s, int quick)
1.265 schwarze 827: {
828: struct roff_man *man;
829:
830: man = mandoc_calloc(1, sizeof(*man));
831: man->parse = parse;
832: man->roff = roff;
1.316 schwarze 833: man->os_s = os_s;
1.265 schwarze 834: man->quick = quick;
835: roff_man_alloc1(man);
1.296 schwarze 836: roff->man = man;
1.277 schwarze 837: return man;
1.67 kristaps 838: }
839:
1.266 schwarze 840: /* --- syntax tree handling ----------------------------------------------- */
841:
842: struct roff_node *
843: roff_node_alloc(struct roff_man *man, int line, int pos,
844: enum roff_type type, int tok)
845: {
846: struct roff_node *n;
847:
848: n = mandoc_calloc(1, sizeof(*n));
849: n->line = line;
850: n->pos = pos;
851: n->tok = tok;
852: n->type = type;
853: n->sec = man->lastsec;
854:
855: if (man->flags & MDOC_SYNOPSIS)
1.285 schwarze 856: n->flags |= NODE_SYNPRETTY;
1.266 schwarze 857: else
1.285 schwarze 858: n->flags &= ~NODE_SYNPRETTY;
1.266 schwarze 859: if (man->flags & MDOC_NEWLINE)
1.285 schwarze 860: n->flags |= NODE_LINE;
1.266 schwarze 861: man->flags &= ~MDOC_NEWLINE;
862:
1.277 schwarze 863: return n;
1.266 schwarze 864: }
865:
866: void
867: roff_node_append(struct roff_man *man, struct roff_node *n)
868: {
869:
870: switch (man->next) {
871: case ROFF_NEXT_SIBLING:
1.281 schwarze 872: if (man->last->next != NULL) {
873: n->next = man->last->next;
874: man->last->next->prev = n;
875: } else
876: man->last->parent->last = n;
1.266 schwarze 877: man->last->next = n;
878: n->prev = man->last;
879: n->parent = man->last->parent;
880: break;
881: case ROFF_NEXT_CHILD:
1.287 schwarze 882: if (man->last->child != NULL) {
883: n->next = man->last->child;
884: man->last->child->prev = n;
885: } else
886: man->last->last = n;
1.266 schwarze 887: man->last->child = n;
888: n->parent = man->last;
889: break;
890: default:
891: abort();
892: }
1.282 schwarze 893: man->last = n;
1.266 schwarze 894:
895: switch (n->type) {
896: case ROFFT_HEAD:
897: n->parent->head = n;
898: break;
899: case ROFFT_BODY:
1.282 schwarze 900: if (n->end != ENDBODY_NOT)
901: return;
1.266 schwarze 902: n->parent->body = n;
903: break;
904: case ROFFT_TAIL:
905: n->parent->tail = n;
906: break;
907: default:
1.282 schwarze 908: return;
1.266 schwarze 909: }
1.282 schwarze 910:
911: /*
912: * Copy over the normalised-data pointer of our parent. Not
913: * everybody has one, but copying a null pointer is fine.
914: */
915:
916: n->norm = n->parent->norm;
917: assert(n->parent->type == ROFFT_BLOCK);
1.266 schwarze 918: }
919:
1.267 schwarze 920: void
921: roff_word_alloc(struct roff_man *man, int line, int pos, const char *word)
922: {
923: struct roff_node *n;
924:
925: n = roff_node_alloc(man, line, pos, ROFFT_TEXT, TOKEN_NONE);
926: n->string = roff_strdup(man->roff, word);
927: roff_node_append(man, n);
1.286 schwarze 928: n->flags |= NODE_VALID | NODE_ENDED;
1.267 schwarze 929: man->next = ROFF_NEXT_SIBLING;
930: }
931:
932: void
933: roff_word_append(struct roff_man *man, const char *word)
934: {
935: struct roff_node *n;
936: char *addstr, *newstr;
937:
938: n = man->last;
939: addstr = roff_strdup(man->roff, word);
940: mandoc_asprintf(&newstr, "%s %s", n->string, addstr);
941: free(addstr);
942: free(n->string);
943: n->string = newstr;
944: man->next = ROFF_NEXT_SIBLING;
1.268 schwarze 945: }
946:
947: void
948: roff_elem_alloc(struct roff_man *man, int line, int pos, int tok)
949: {
950: struct roff_node *n;
951:
952: n = roff_node_alloc(man, line, pos, ROFFT_ELEM, tok);
953: roff_node_append(man, n);
954: man->next = ROFF_NEXT_CHILD;
955: }
956:
957: struct roff_node *
958: roff_block_alloc(struct roff_man *man, int line, int pos, int tok)
959: {
960: struct roff_node *n;
961:
962: n = roff_node_alloc(man, line, pos, ROFFT_BLOCK, tok);
963: roff_node_append(man, n);
964: man->next = ROFF_NEXT_CHILD;
1.277 schwarze 965: return n;
1.267 schwarze 966: }
967:
1.266 schwarze 968: struct roff_node *
969: roff_head_alloc(struct roff_man *man, int line, int pos, int tok)
970: {
971: struct roff_node *n;
972:
973: n = roff_node_alloc(man, line, pos, ROFFT_HEAD, tok);
974: roff_node_append(man, n);
975: man->next = ROFF_NEXT_CHILD;
1.277 schwarze 976: return n;
1.266 schwarze 977: }
978:
979: struct roff_node *
980: roff_body_alloc(struct roff_man *man, int line, int pos, int tok)
981: {
982: struct roff_node *n;
983:
984: n = roff_node_alloc(man, line, pos, ROFFT_BODY, tok);
985: roff_node_append(man, n);
986: man->next = ROFF_NEXT_CHILD;
1.277 schwarze 987: return n;
1.267 schwarze 988: }
989:
1.321 schwarze 990: static void
991: roff_addtbl(struct roff_man *man, struct tbl_node *tbl)
1.267 schwarze 992: {
993: struct roff_node *n;
1.321 schwarze 994: const struct tbl_span *span;
1.267 schwarze 995:
996: if (man->macroset == MACROSET_MAN)
1.302 schwarze 997: man_breakscope(man, ROFF_TS);
1.321 schwarze 998: while ((span = tbl_span(tbl)) != NULL) {
999: n = roff_node_alloc(man, tbl->line, 0, ROFFT_TBL, TOKEN_NONE);
1000: n->span = span;
1001: roff_node_append(man, n);
1002: n->flags |= NODE_VALID | NODE_ENDED;
1003: man->next = ROFF_NEXT_SIBLING;
1004: }
1.266 schwarze 1005: }
1006:
1007: void
1008: roff_node_unlink(struct roff_man *man, struct roff_node *n)
1009: {
1010:
1011: /* Adjust siblings. */
1012:
1013: if (n->prev)
1014: n->prev->next = n->next;
1015: if (n->next)
1016: n->next->prev = n->prev;
1017:
1018: /* Adjust parent. */
1019:
1020: if (n->parent != NULL) {
1021: if (n->parent->child == n)
1022: n->parent->child = n->next;
1023: if (n->parent->last == n)
1024: n->parent->last = n->prev;
1025: }
1026:
1027: /* Adjust parse point. */
1028:
1029: if (man == NULL)
1030: return;
1031: if (man->last == n) {
1032: if (n->prev == NULL) {
1033: man->last = n->parent;
1034: man->next = ROFF_NEXT_CHILD;
1035: } else {
1036: man->last = n->prev;
1037: man->next = ROFF_NEXT_SIBLING;
1038: }
1039: }
1040: if (man->first == n)
1041: man->first = NULL;
1042: }
1043:
1044: void
1045: roff_node_free(struct roff_node *n)
1046: {
1047:
1048: if (n->args != NULL)
1049: mdoc_argv_free(n->args);
1050: if (n->type == ROFFT_BLOCK || n->type == ROFFT_ELEM)
1051: free(n->norm);
1.319 schwarze 1052: if (n->eqn != NULL)
1053: eqn_box_free(n->eqn);
1.266 schwarze 1054: free(n->string);
1055: free(n);
1056: }
1057:
1058: void
1059: roff_node_delete(struct roff_man *man, struct roff_node *n)
1060: {
1061:
1062: while (n->child != NULL)
1063: roff_node_delete(man, n->child);
1064: roff_node_unlink(man, n);
1065: roff_node_free(n);
1.269 schwarze 1066: }
1067:
1068: void
1069: deroff(char **dest, const struct roff_node *n)
1070: {
1071: char *cp;
1072: size_t sz;
1073:
1074: if (n->type != ROFFT_TEXT) {
1075: for (n = n->child; n != NULL; n = n->next)
1076: deroff(dest, n);
1077: return;
1078: }
1079:
1.288 schwarze 1080: /* Skip leading whitespace. */
1.269 schwarze 1081:
1.288 schwarze 1082: for (cp = n->string; *cp != '\0'; cp++) {
1.289 schwarze 1083: if (cp[0] == '\\' && cp[1] != '\0' &&
1084: strchr(" %&0^|~", cp[1]) != NULL)
1.269 schwarze 1085: cp++;
1.288 schwarze 1086: else if ( ! isspace((unsigned char)*cp))
1.269 schwarze 1087: break;
1088: }
1089:
1.289 schwarze 1090: /* Skip trailing backslash. */
1091:
1092: sz = strlen(cp);
1.290 schwarze 1093: if (sz > 0 && cp[sz - 1] == '\\')
1.289 schwarze 1094: sz--;
1095:
1.269 schwarze 1096: /* Skip trailing whitespace. */
1097:
1.289 schwarze 1098: for (; sz; sz--)
1.269 schwarze 1099: if ( ! isspace((unsigned char)cp[sz-1]))
1100: break;
1101:
1102: /* Skip empty strings. */
1103:
1104: if (sz == 0)
1105: return;
1106:
1107: if (*dest == NULL) {
1108: *dest = mandoc_strndup(cp, sz);
1109: return;
1110: }
1111:
1112: mandoc_asprintf(&cp, "%s %*s", *dest, (int)sz, cp);
1113: free(*dest);
1114: *dest = cp;
1.266 schwarze 1115: }
1116:
1117: /* --- main functions of the roff parser ---------------------------------- */
1118:
1.94 kristaps 1119: /*
1.206 schwarze 1120: * In the current line, expand escape sequences that tend to get
1121: * used in numerical expressions and conditional requests.
1122: * Also check the syntax of the remaining escape sequences.
1.154 kristaps 1123: */
1.172 schwarze 1124: static enum rofferr
1.238 schwarze 1125: roff_res(struct roff *r, struct buf *buf, int ln, int pos)
1.94 kristaps 1126: {
1.208 schwarze 1127: char ubuf[24]; /* buffer to print the number */
1.328 schwarze 1128: struct roff_node *n; /* used for header comments */
1.205 schwarze 1129: const char *start; /* start of the string to process */
1.209 schwarze 1130: char *stesc; /* start of an escape sequence ('\\') */
1.328 schwarze 1131: char *ep; /* end of comment string */
1.108 schwarze 1132: const char *stnam; /* start of the name, after "[(*" */
1133: const char *cp; /* end of the name, e.g. before ']' */
1134: const char *res; /* the string to be substituted */
1.238 schwarze 1135: char *nbuf; /* new buffer to copy buf->buf to */
1.181 schwarze 1136: size_t maxl; /* expected length of the escape name */
1137: size_t naml; /* actual length of the escape name */
1.237 schwarze 1138: enum mandoc_esc esc; /* type of the escape sequence */
1139: int inaml; /* length returned from mandoc_escape() */
1.181 schwarze 1140: int expand_count; /* to avoid infinite loops */
1.206 schwarze 1141: int npos; /* position in numeric expression */
1.218 schwarze 1142: int arg_complete; /* argument not interrupted by eol */
1.303 schwarze 1143: int done; /* no more input available */
1.315 schwarze 1144: int deftype; /* type of definition to paste */
1.323 schwarze 1145: int rcsid; /* kind of RCS id seen */
1.327 schwarze 1146: char sign; /* increment number register */
1.206 schwarze 1147: char term; /* character terminating the escape */
1.94 kristaps 1148:
1.303 schwarze 1149: /* Search forward for comments. */
1150:
1151: done = 0;
1152: start = buf->buf + pos;
1153: for (stesc = buf->buf + pos; *stesc != '\0'; stesc++) {
1154: if (stesc[0] != r->escape || stesc[1] == '\0')
1155: continue;
1156: stesc++;
1157: if (*stesc != '"' && *stesc != '#')
1158: continue;
1.313 schwarze 1159:
1160: /* Comment found, look for RCS id. */
1161:
1.323 schwarze 1162: rcsid = 0;
1.313 schwarze 1163: if ((cp = strstr(stesc, "$" "OpenBSD")) != NULL) {
1.323 schwarze 1164: rcsid = 1 << MANDOC_OS_OPENBSD;
1.313 schwarze 1165: cp += 8;
1166: } else if ((cp = strstr(stesc, "$" "NetBSD")) != NULL) {
1.323 schwarze 1167: rcsid = 1 << MANDOC_OS_NETBSD;
1.313 schwarze 1168: cp += 7;
1169: }
1170: if (cp != NULL &&
1171: isalnum((unsigned char)*cp) == 0 &&
1.314 schwarze 1172: strchr(cp, '$') != NULL) {
1.323 schwarze 1173: if (r->man->meta.rcsids & rcsid)
1.314 schwarze 1174: mandoc_msg(MANDOCERR_RCS_REP, r->parse,
1175: ln, stesc + 1 - buf->buf, stesc + 1);
1.323 schwarze 1176: r->man->meta.rcsids |= rcsid;
1.314 schwarze 1177: }
1.313 schwarze 1178:
1179: /* Handle trailing whitespace. */
1180:
1.328 schwarze 1181: ep = strchr(stesc--, '\0') - 1;
1182: if (*ep == '\n') {
1.303 schwarze 1183: done = 1;
1.328 schwarze 1184: ep--;
1.303 schwarze 1185: }
1.328 schwarze 1186: if (*ep == ' ' || *ep == '\t')
1.303 schwarze 1187: mandoc_msg(MANDOCERR_SPACE_EOL, r->parse,
1.328 schwarze 1188: ln, ep - buf->buf, NULL);
1189:
1190: /*
1191: * Save comments preceding the title macro
1192: * in the syntax tree.
1193: */
1194:
1195: if (r->format == 0) {
1196: while (*ep == ' ' || *ep == '\t')
1197: ep--;
1198: ep[1] = '\0';
1199: n = roff_node_alloc(r->man,
1200: ln, stesc + 1 - buf->buf,
1201: ROFFT_COMMENT, TOKEN_NONE);
1202: n->string = mandoc_strdup(stesc + 2);
1203: roff_node_append(r->man, n);
1204: n->flags |= NODE_VALID | NODE_ENDED;
1205: r->man->next = ROFF_NEXT_SIBLING;
1206: }
1207:
1.334 ! schwarze 1208: /* Line continuation with comment. */
! 1209:
! 1210: if (stesc[1] == '#') {
! 1211: *stesc = '\0';
! 1212: return ROFF_APPEND;
! 1213: }
! 1214:
! 1215: /* Discard normal comments. */
1.328 schwarze 1216:
1.303 schwarze 1217: while (stesc > start && stesc[-1] == ' ')
1218: stesc--;
1219: *stesc = '\0';
1220: break;
1221: }
1222: if (stesc == start)
1223: return ROFF_CONT;
1224: stesc--;
1225:
1226: /* Notice the end of the input. */
1227:
1228: if (*stesc == '\n') {
1229: *stesc-- = '\0';
1230: done = 1;
1231: }
1232:
1.170 schwarze 1233: expand_count = 0;
1.303 schwarze 1234: while (stesc >= start) {
1.170 schwarze 1235:
1.205 schwarze 1236: /* Search backwards for the next backslash. */
1237:
1.303 schwarze 1238: if (*stesc != r->escape) {
1239: if (*stesc == '\\') {
1240: *stesc = '\0';
1241: buf->sz = mandoc_asprintf(&nbuf, "%s\\e%s",
1242: buf->buf, stesc + 1) + 1;
1243: start = nbuf + pos;
1244: stesc = nbuf + (stesc - buf->buf);
1245: free(buf->buf);
1246: buf->buf = nbuf;
1247: }
1248: stesc--;
1.205 schwarze 1249: continue;
1.303 schwarze 1250: }
1.205 schwarze 1251:
1252: /* If it is escaped, skip it. */
1253:
1254: for (cp = stesc - 1; cp >= start; cp--)
1.303 schwarze 1255: if (*cp != r->escape)
1.205 schwarze 1256: break;
1257:
1.238 schwarze 1258: if ((stesc - cp) % 2 == 0) {
1.303 schwarze 1259: while (stesc > cp)
1260: *stesc-- = '\\';
1.205 schwarze 1261: continue;
1.303 schwarze 1262: } else if (stesc[1] != '\0') {
1263: *stesc = '\\';
1264: } else {
1265: *stesc-- = '\0';
1266: if (done)
1267: continue;
1268: else
1269: return ROFF_APPEND;
1.205 schwarze 1270: }
1.108 schwarze 1271:
1.206 schwarze 1272: /* Decide whether to expand or to check only. */
1.108 schwarze 1273:
1.206 schwarze 1274: term = '\0';
1.205 schwarze 1275: cp = stesc + 1;
1.181 schwarze 1276: switch (*cp) {
1.207 schwarze 1277: case '*':
1.181 schwarze 1278: res = NULL;
1279: break;
1.207 schwarze 1280: case 'B':
1281: case 'w':
1.206 schwarze 1282: term = cp[1];
1283: /* FALLTHROUGH */
1.207 schwarze 1284: case 'n':
1.327 schwarze 1285: sign = cp[1];
1286: if (sign == '+' || sign == '-')
1287: cp++;
1.181 schwarze 1288: res = ubuf;
1289: break;
1290: default:
1.237 schwarze 1291: esc = mandoc_escape(&cp, &stnam, &inaml);
1292: if (esc == ESCAPE_ERROR ||
1293: (esc == ESCAPE_SPECIAL &&
1.279 schwarze 1294: mchars_spec2cp(stnam, inaml) < 0))
1.219 schwarze 1295: mandoc_vmsg(MANDOCERR_ESC_BAD,
1.238 schwarze 1296: r->parse, ln, (int)(stesc - buf->buf),
1.219 schwarze 1297: "%.*s", (int)(cp - stesc), stesc);
1.303 schwarze 1298: stesc--;
1.205 schwarze 1299: continue;
1.152 kristaps 1300: }
1301:
1.205 schwarze 1302: if (EXPAND_LIMIT < ++expand_count) {
1303: mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
1.238 schwarze 1304: ln, (int)(stesc - buf->buf), NULL);
1.277 schwarze 1305: return ROFF_IGN;
1.205 schwarze 1306: }
1.108 schwarze 1307:
1308: /*
1309: * The third character decides the length
1.181 schwarze 1310: * of the name of the string or register.
1.108 schwarze 1311: * Save a pointer to the name.
1312: */
1313:
1.238 schwarze 1314: if (term == '\0') {
1.206 schwarze 1315: switch (*++cp) {
1.207 schwarze 1316: case '\0':
1.206 schwarze 1317: maxl = 0;
1318: break;
1.207 schwarze 1319: case '(':
1.206 schwarze 1320: cp++;
1321: maxl = 2;
1322: break;
1.207 schwarze 1323: case '[':
1.206 schwarze 1324: cp++;
1325: term = ']';
1326: maxl = 0;
1327: break;
1328: default:
1329: maxl = 1;
1330: break;
1331: }
1332: } else {
1333: cp += 2;
1.94 kristaps 1334: maxl = 0;
1335: }
1.108 schwarze 1336: stnam = cp;
1.94 kristaps 1337:
1.108 schwarze 1338: /* Advance to the end of the name. */
1.94 kristaps 1339:
1.253 schwarze 1340: naml = 0;
1.218 schwarze 1341: arg_complete = 1;
1.253 schwarze 1342: while (maxl == 0 || naml < maxl) {
1.238 schwarze 1343: if (*cp == '\0') {
1.219 schwarze 1344: mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.238 schwarze 1345: ln, (int)(stesc - buf->buf), stesc);
1.218 schwarze 1346: arg_complete = 0;
1.206 schwarze 1347: break;
1.153 kristaps 1348: }
1.238 schwarze 1349: if (maxl == 0 && *cp == term) {
1.206 schwarze 1350: cp++;
1.253 schwarze 1351: break;
1352: }
1353: if (*cp++ != '\\' || stesc[1] != 'w') {
1354: naml++;
1355: continue;
1356: }
1357: switch (mandoc_escape(&cp, NULL, NULL)) {
1358: case ESCAPE_SPECIAL:
1359: case ESCAPE_UNICODE:
1360: case ESCAPE_NUMBERED:
1361: case ESCAPE_OVERSTRIKE:
1362: naml++;
1363: break;
1364: default:
1.94 kristaps 1365: break;
1.206 schwarze 1366: }
1.94 kristaps 1367: }
1368:
1.108 schwarze 1369: /*
1370: * Retrieve the replacement string; if it is
1371: * undefined, resume searching for escapes.
1372: */
1373:
1.206 schwarze 1374: switch (stesc[1]) {
1.207 schwarze 1375: case '*':
1.315 schwarze 1376: if (arg_complete) {
1377: deftype = ROFFDEF_USER | ROFFDEF_PRE;
1378: res = roff_getstrn(r, stnam, naml, &deftype);
1.331 schwarze 1379:
1380: /*
1381: * If not overriden, let \*(.T
1382: * through to the formatters.
1383: */
1384:
1385: if (res == NULL && naml == 2 &&
1386: stnam[0] == '.' && stnam[1] == 'T') {
1387: roff_setstrn(&r->strtab,
1388: ".T", 2, NULL, 0, 0);
1389: stesc--;
1390: continue;
1391: }
1.315 schwarze 1392: }
1.206 schwarze 1393: break;
1.207 schwarze 1394: case 'B':
1.206 schwarze 1395: npos = 0;
1.218 schwarze 1396: ubuf[0] = arg_complete &&
1.261 schwarze 1397: roff_evalnum(r, ln, stnam, &npos,
1398: NULL, ROFFNUM_SCALE) &&
1.218 schwarze 1399: stnam + npos + 1 == cp ? '1' : '0';
1.206 schwarze 1400: ubuf[1] = '\0';
1401: break;
1.207 schwarze 1402: case 'n':
1.218 schwarze 1403: if (arg_complete)
1404: (void)snprintf(ubuf, sizeof(ubuf), "%d",
1.327 schwarze 1405: roff_getregn(r, stnam, naml, sign));
1.218 schwarze 1406: else
1407: ubuf[0] = '\0';
1.206 schwarze 1408: break;
1.207 schwarze 1409: case 'w':
1.218 schwarze 1410: /* use even incomplete args */
1.208 schwarze 1411: (void)snprintf(ubuf, sizeof(ubuf), "%d",
1.206 schwarze 1412: 24 * (int)naml);
1413: break;
1414: }
1.94 kristaps 1415:
1.238 schwarze 1416: if (res == NULL) {
1.219 schwarze 1417: mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.238 schwarze 1418: r->parse, ln, (int)(stesc - buf->buf),
1.219 schwarze 1419: "%.*s", (int)naml, stnam);
1.142 kristaps 1420: res = "";
1.246 schwarze 1421: } else if (buf->sz + strlen(res) > SHRT_MAX) {
1422: mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
1423: ln, (int)(stesc - buf->buf), NULL);
1.277 schwarze 1424: return ROFF_IGN;
1.94 kristaps 1425: }
1426:
1.108 schwarze 1427: /* Replace the escape sequence by the string. */
1428:
1.209 schwarze 1429: *stesc = '\0';
1.238 schwarze 1430: buf->sz = mandoc_asprintf(&nbuf, "%s%s%s",
1431: buf->buf, res, cp) + 1;
1.94 kristaps 1432:
1.205 schwarze 1433: /* Prepare for the next replacement. */
1.94 kristaps 1434:
1.205 schwarze 1435: start = nbuf + pos;
1.238 schwarze 1436: stesc = nbuf + (stesc - buf->buf) + strlen(res);
1437: free(buf->buf);
1438: buf->buf = nbuf;
1.154 kristaps 1439: }
1.277 schwarze 1440: return ROFF_CONT;
1.154 kristaps 1441: }
1442:
1443: /*
1.275 schwarze 1444: * Process text streams.
1.154 kristaps 1445: */
1446: static enum rofferr
1.305 schwarze 1447: roff_parsetext(struct roff *r, struct buf *buf, int pos, int *offs)
1.154 kristaps 1448: {
1449: size_t sz;
1450: const char *start;
1.178 schwarze 1451: char *p;
1452: int isz;
1.154 kristaps 1453: enum mandoc_esc esc;
1454:
1.275 schwarze 1455: /* Spring the input line trap. */
1456:
1457: if (roffit_lines == 1) {
1458: isz = mandoc_asprintf(&p, "%s\n.%s", buf->buf, roffit_macro);
1459: free(buf->buf);
1460: buf->buf = p;
1461: buf->sz = isz + 1;
1462: *offs = 0;
1463: free(roffit_macro);
1464: roffit_lines = 0;
1.277 schwarze 1465: return ROFF_REPARSE;
1.275 schwarze 1466: } else if (roffit_lines > 1)
1467: --roffit_lines;
1468:
1.305 schwarze 1469: if (roffce_node != NULL && buf->buf[pos] != '\0') {
1470: if (roffce_lines < 1) {
1471: r->man->last = roffce_node;
1472: r->man->next = ROFF_NEXT_SIBLING;
1473: roffce_lines = 0;
1474: roffce_node = NULL;
1475: } else
1476: roffce_lines--;
1477: }
1478:
1.275 schwarze 1479: /* Convert all breakable hyphens into ASCII_HYPH. */
1480:
1.238 schwarze 1481: start = p = buf->buf + pos;
1.154 kristaps 1482:
1.238 schwarze 1483: while (*p != '\0') {
1.154 kristaps 1484: sz = strcspn(p, "-\\");
1485: p += sz;
1486:
1.238 schwarze 1487: if (*p == '\0')
1.159 kristaps 1488: break;
1489:
1.238 schwarze 1490: if (*p == '\\') {
1.154 kristaps 1491: /* Skip over escapes. */
1492: p++;
1.189 schwarze 1493: esc = mandoc_escape((const char **)&p, NULL, NULL);
1.238 schwarze 1494: if (esc == ESCAPE_ERROR)
1.154 kristaps 1495: break;
1.264 schwarze 1496: while (*p == '-')
1497: p++;
1.155 kristaps 1498: continue;
1.159 kristaps 1499: } else if (p == start) {
1.158 kristaps 1500: p++;
1.155 kristaps 1501: continue;
1.158 kristaps 1502: }
1.155 kristaps 1503:
1.171 schwarze 1504: if (isalpha((unsigned char)p[-1]) &&
1505: isalpha((unsigned char)p[1]))
1.155 kristaps 1506: *p = ASCII_HYPH;
1507: p++;
1.94 kristaps 1508: }
1.277 schwarze 1509: return ROFF_CONT;
1.94 kristaps 1510: }
1511:
1.67 kristaps 1512: enum rofferr
1.238 schwarze 1513: roff_parseln(struct roff *r, int ln, struct buf *buf, int *offs)
1.67 kristaps 1514: {
1.294 schwarze 1515: enum roff_tok t;
1.109 kristaps 1516: enum rofferr e;
1.238 schwarze 1517: int pos; /* parse point */
1.243 schwarze 1518: int spos; /* saved parse point for messages */
1.238 schwarze 1519: int ppos; /* original offset in buf->buf */
1520: int ctl; /* macro line (boolean) */
1521:
1522: ppos = pos = *offs;
1.79 kristaps 1523:
1.230 schwarze 1524: /* Handle in-line equation delimiters. */
1525:
1.236 schwarze 1526: if (r->tbl == NULL &&
1527: r->last_eqn != NULL && r->last_eqn->delim &&
1.230 schwarze 1528: (r->eqn == NULL || r->eqn_inline)) {
1.238 schwarze 1529: e = roff_eqndelim(r, buf, pos);
1.230 schwarze 1530: if (e == ROFF_REPARSE)
1.277 schwarze 1531: return e;
1.230 schwarze 1532: assert(e == ROFF_CONT);
1533: }
1534:
1535: /* Expand some escape sequences. */
1.94 kristaps 1536:
1.238 schwarze 1537: e = roff_res(r, buf, ln, pos);
1.303 schwarze 1538: if (e == ROFF_IGN || e == ROFF_APPEND)
1.277 schwarze 1539: return e;
1.238 schwarze 1540: assert(e == ROFF_CONT);
1.94 kristaps 1541:
1.238 schwarze 1542: ctl = roff_getcontrol(r, buf->buf, &pos);
1.130 kristaps 1543:
1.94 kristaps 1544: /*
1.79 kristaps 1545: * First, if a scope is open and we're not a macro, pass the
1.252 schwarze 1546: * text through the macro's filter.
1547: * Equations process all content themselves.
1548: * Tables process almost all content themselves, but we want
1549: * to warn about macros before passing it there.
1.79 kristaps 1550: */
1.74 kristaps 1551:
1.252 schwarze 1552: if (r->last != NULL && ! ctl) {
1.78 kristaps 1553: t = r->last->tok;
1.238 schwarze 1554: e = (*roffs[t].text)(r, t, buf, ln, pos, pos, offs);
1.294 schwarze 1555: if (e == ROFF_IGN)
1.277 schwarze 1556: return e;
1.294 schwarze 1557: assert(e == ROFF_CONT);
1.182 schwarze 1558: }
1.319 schwarze 1559: if (r->eqn != NULL && strncmp(buf->buf + ppos, ".EN", 3)) {
1560: eqn_read(r->eqn, buf->buf + ppos);
1561: return ROFF_IGN;
1562: }
1.321 schwarze 1563: if (r->tbl != NULL && (ctl == 0 || buf->buf[pos] == '\0')) {
1564: tbl_read(r->tbl, ln, buf->buf, ppos);
1565: roff_addtbl(r->man, r->tbl);
1566: return ROFF_IGN;
1567: }
1.252 schwarze 1568: if ( ! ctl)
1.305 schwarze 1569: return roff_parsetext(r, buf, pos, offs);
1.228 schwarze 1570:
1571: /* Skip empty request lines. */
1572:
1.238 schwarze 1573: if (buf->buf[pos] == '"') {
1.228 schwarze 1574: mandoc_msg(MANDOCERR_COMMENT_BAD, r->parse,
1575: ln, pos, NULL);
1.277 schwarze 1576: return ROFF_IGN;
1.238 schwarze 1577: } else if (buf->buf[pos] == '\0')
1.277 schwarze 1578: return ROFF_IGN;
1.67 kristaps 1579:
1.79 kristaps 1580: /*
1581: * If a scope is open, go to the child handler for that macro,
1582: * as it may want to preprocess before doing anything with it.
1.125 kristaps 1583: * Don't do so if an equation is open.
1.79 kristaps 1584: */
1.78 kristaps 1585:
1.79 kristaps 1586: if (r->last) {
1587: t = r->last->tok;
1.277 schwarze 1588: return (*roffs[t].sub)(r, t, buf, ln, ppos, pos, offs);
1.79 kristaps 1589: }
1.78 kristaps 1590:
1.243 schwarze 1591: /* No scope is open. This is a new request or macro. */
1592:
1593: spos = pos;
1594: t = roff_parse(r, buf->buf, &pos, ln, ppos);
1595:
1596: /* Tables ignore most macros. */
1597:
1.308 schwarze 1598: if (r->tbl != NULL && (t == TOKEN_NONE || t == ROFF_TS ||
1.309 schwarze 1599: t == ROFF_br || t == ROFF_ce || t == ROFF_rj || t == ROFF_sp)) {
1.243 schwarze 1600: mandoc_msg(MANDOCERR_TBLMACRO, r->parse,
1601: ln, pos, buf->buf + spos);
1.308 schwarze 1602: if (t != TOKEN_NONE)
1.277 schwarze 1603: return ROFF_IGN;
1.257 schwarze 1604: while (buf->buf[pos] != '\0' && buf->buf[pos] != ' ')
1605: pos++;
1.291 schwarze 1606: while (buf->buf[pos] == ' ')
1.257 schwarze 1607: pos++;
1.321 schwarze 1608: tbl_read(r->tbl, ln, buf->buf, pos);
1609: roff_addtbl(r->man, r->tbl);
1610: return ROFF_IGN;
1.243 schwarze 1611: }
1612:
1.305 schwarze 1613: /* For now, let high level macros abort .ce mode. */
1614:
1615: if (ctl && roffce_node != NULL &&
1.324 schwarze 1616: (t == TOKEN_NONE || t == ROFF_Dd || t == ROFF_EQ ||
1617: t == ROFF_TH || t == ROFF_TS)) {
1.305 schwarze 1618: r->man->last = roffce_node;
1619: r->man->next = ROFF_NEXT_SIBLING;
1620: roffce_lines = 0;
1621: roffce_node = NULL;
1622: }
1623:
1.79 kristaps 1624: /*
1.243 schwarze 1625: * This is neither a roff request nor a user-defined macro.
1626: * Let the standard macro set parsers handle it.
1.79 kristaps 1627: */
1.67 kristaps 1628:
1.294 schwarze 1629: if (t == TOKEN_NONE)
1.277 schwarze 1630: return ROFF_CONT;
1.243 schwarze 1631:
1632: /* Execute a roff request or a user defined macro. */
1.67 kristaps 1633:
1.296 schwarze 1634: return (*roffs[t].proc)(r, t, buf, ln, spos, pos, offs);
1.74 kristaps 1635: }
1636:
1.117 kristaps 1637: void
1.74 kristaps 1638: roff_endparse(struct roff *r)
1639: {
1.321 schwarze 1640: if (r->last != NULL)
1.221 schwarze 1641: mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
1642: r->last->line, r->last->col,
1.295 schwarze 1643: roff_name[r->last->tok]);
1.117 kristaps 1644:
1.321 schwarze 1645: if (r->eqn != NULL) {
1.221 schwarze 1646: mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
1.319 schwarze 1647: r->eqn->node->line, r->eqn->node->pos, "EQ");
1648: eqn_parse(r->eqn);
1649: r->eqn = NULL;
1.125 kristaps 1650: }
1651:
1.321 schwarze 1652: if (r->tbl != NULL) {
1.221 schwarze 1653: mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
1654: r->tbl->line, r->tbl->pos, "TS");
1.321 schwarze 1655: tbl_end(r->tbl);
1656: r->tbl = NULL;
1.117 kristaps 1657: }
1.67 kristaps 1658: }
1659:
1660: /*
1661: * Parse a roff node's type from the input buffer. This must be in the
1662: * form of ".foo xxx" in the usual way.
1663: */
1.294 schwarze 1664: static enum roff_tok
1.214 schwarze 1665: roff_parse(struct roff *r, char *buf, int *pos, int ln, int ppos)
1.67 kristaps 1666: {
1.214 schwarze 1667: char *cp;
1.106 kristaps 1668: const char *mac;
1669: size_t maclen;
1.315 schwarze 1670: int deftype;
1.294 schwarze 1671: enum roff_tok t;
1.67 kristaps 1672:
1.214 schwarze 1673: cp = buf + *pos;
1674:
1675: if ('\0' == *cp || '"' == *cp || '\t' == *cp || ' ' == *cp)
1.294 schwarze 1676: return TOKEN_NONE;
1.67 kristaps 1677:
1.214 schwarze 1678: mac = cp;
1679: maclen = roff_getname(r, &cp, ln, ppos);
1.67 kristaps 1680:
1.315 schwarze 1681: deftype = ROFFDEF_USER | ROFFDEF_REN;
1682: r->current_string = roff_getstrn(r, mac, maclen, &deftype);
1683: switch (deftype) {
1684: case ROFFDEF_USER:
1685: t = ROFF_USERDEF;
1686: break;
1687: case ROFFDEF_REN:
1688: t = ROFF_RENAMED;
1689: break;
1690: default:
1691: t = roffhash_find(r->reqtab, mac, maclen);
1692: break;
1693: }
1.294 schwarze 1694: if (t != TOKEN_NONE)
1.214 schwarze 1695: *pos = cp - buf;
1.325 schwarze 1696: else if (deftype == ROFFDEF_UNDEF) {
1697: /* Using an undefined macro defines it to be empty. */
1698: roff_setstrn(&r->strtab, mac, maclen, "", 0, 0);
1699: roff_setstrn(&r->rentab, mac, maclen, NULL, 0, 0);
1700: }
1.277 schwarze 1701: return t;
1.67 kristaps 1702: }
1703:
1.266 schwarze 1704: /* --- handling of request blocks ----------------------------------------- */
1705:
1.67 kristaps 1706: static enum rofferr
1.76 kristaps 1707: roff_cblock(ROFF_ARGS)
1.67 kristaps 1708: {
1709:
1.79 kristaps 1710: /*
1711: * A block-close `..' should only be invoked as a child of an
1712: * ignore macro, otherwise raise a warning and just ignore it.
1713: */
1714:
1.238 schwarze 1715: if (r->last == NULL) {
1.221 schwarze 1716: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
1717: ln, ppos, "..");
1.277 schwarze 1718: return ROFF_IGN;
1.76 kristaps 1719: }
1.67 kristaps 1720:
1.81 kristaps 1721: switch (r->last->tok) {
1.207 schwarze 1722: case ROFF_am:
1.220 schwarze 1723: /* ROFF_am1 is remapped to ROFF_am in roff_block(). */
1.207 schwarze 1724: case ROFF_ami:
1725: case ROFF_de:
1.108 schwarze 1726: /* ROFF_de1 is remapped to ROFF_de in roff_block(). */
1.207 schwarze 1727: case ROFF_dei:
1728: case ROFF_ig:
1.81 kristaps 1729: break;
1730: default:
1.221 schwarze 1731: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
1732: ln, ppos, "..");
1.277 schwarze 1733: return ROFF_IGN;
1.76 kristaps 1734: }
1.67 kristaps 1735:
1.238 schwarze 1736: if (buf->buf[pos] != '\0')
1.217 schwarze 1737: mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
1.238 schwarze 1738: ".. %s", buf->buf + pos);
1.71 kristaps 1739:
1740: roffnode_pop(r);
1.76 kristaps 1741: roffnode_cleanscope(r);
1.277 schwarze 1742: return ROFF_IGN;
1.71 kristaps 1743:
1.67 kristaps 1744: }
1745:
1.76 kristaps 1746: static void
1747: roffnode_cleanscope(struct roff *r)
1.67 kristaps 1748: {
1749:
1.76 kristaps 1750: while (r->last) {
1.173 schwarze 1751: if (--r->last->endspan != 0)
1.76 kristaps 1752: break;
1753: roffnode_pop(r);
1754: }
1.67 kristaps 1755: }
1756:
1.195 schwarze 1757: static void
1758: roff_ccond(struct roff *r, int ln, int ppos)
1.74 kristaps 1759: {
1760:
1.76 kristaps 1761: if (NULL == r->last) {
1.221 schwarze 1762: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
1763: ln, ppos, "\\}");
1.195 schwarze 1764: return;
1.76 kristaps 1765: }
1766:
1.82 kristaps 1767: switch (r->last->tok) {
1.207 schwarze 1768: case ROFF_el:
1769: case ROFF_ie:
1770: case ROFF_if:
1.82 kristaps 1771: break;
1772: default:
1.221 schwarze 1773: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
1774: ln, ppos, "\\}");
1.195 schwarze 1775: return;
1.75 kristaps 1776: }
1777:
1.76 kristaps 1778: if (r->last->endspan > -1) {
1.221 schwarze 1779: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
1780: ln, ppos, "\\}");
1.195 schwarze 1781: return;
1.76 kristaps 1782: }
1783:
1.75 kristaps 1784: roffnode_pop(r);
1.76 kristaps 1785: roffnode_cleanscope(r);
1.195 schwarze 1786: return;
1.76 kristaps 1787: }
1788:
1789: static enum rofferr
1.80 kristaps 1790: roff_block(ROFF_ARGS)
1.76 kristaps 1791: {
1.315 schwarze 1792: const char *name, *value;
1793: char *call, *cp, *iname, *rname;
1794: size_t csz, namesz, rsz;
1795: int deftype;
1.106 kristaps 1796:
1.220 schwarze 1797: /* Ignore groff compatibility mode for now. */
1.76 kristaps 1798:
1.238 schwarze 1799: if (tok == ROFF_de1)
1.220 schwarze 1800: tok = ROFF_de;
1.251 schwarze 1801: else if (tok == ROFF_dei1)
1802: tok = ROFF_dei;
1.238 schwarze 1803: else if (tok == ROFF_am1)
1.220 schwarze 1804: tok = ROFF_am;
1.251 schwarze 1805: else if (tok == ROFF_ami1)
1806: tok = ROFF_ami;
1.220 schwarze 1807:
1808: /* Parse the macro name argument. */
1809:
1.238 schwarze 1810: cp = buf->buf + pos;
1811: if (tok == ROFF_ig) {
1.220 schwarze 1812: iname = NULL;
1813: namesz = 0;
1814: } else {
1815: iname = cp;
1816: namesz = roff_getname(r, &cp, ln, ppos);
1817: iname[namesz] = '\0';
1818: }
1.107 kristaps 1819:
1.220 schwarze 1820: /* Resolve the macro name argument if it is indirect. */
1.107 kristaps 1821:
1.238 schwarze 1822: if (namesz && (tok == ROFF_dei || tok == ROFF_ami)) {
1.315 schwarze 1823: deftype = ROFFDEF_USER;
1824: name = roff_getstrn(r, iname, namesz, &deftype);
1825: if (name == NULL) {
1.220 schwarze 1826: mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.238 schwarze 1827: r->parse, ln, (int)(iname - buf->buf),
1.220 schwarze 1828: "%.*s", (int)namesz, iname);
1829: namesz = 0;
1830: } else
1831: namesz = strlen(name);
1832: } else
1833: name = iname;
1.107 kristaps 1834:
1.238 schwarze 1835: if (namesz == 0 && tok != ROFF_ig) {
1.220 schwarze 1836: mandoc_msg(MANDOCERR_REQ_EMPTY, r->parse,
1.295 schwarze 1837: ln, ppos, roff_name[tok]);
1.277 schwarze 1838: return ROFF_IGN;
1.220 schwarze 1839: }
1.80 kristaps 1840:
1.106 kristaps 1841: roffnode_push(r, tok, name, ln, ppos);
1842:
1843: /*
1844: * At the beginning of a `de' macro, clear the existing string
1845: * with the same name, if there is one. New content will be
1.193 schwarze 1846: * appended from roff_block_text() in multiline mode.
1.106 kristaps 1847: */
1.107 kristaps 1848:
1.311 schwarze 1849: if (tok == ROFF_de || tok == ROFF_dei) {
1.213 schwarze 1850: roff_setstrn(&r->strtab, name, namesz, "", 0, 0);
1.311 schwarze 1851: roff_setstrn(&r->rentab, name, namesz, NULL, 0, 0);
1.315 schwarze 1852: } else if (tok == ROFF_am || tok == ROFF_ami) {
1853: deftype = ROFFDEF_ANY;
1854: value = roff_getstrn(r, iname, namesz, &deftype);
1855: switch (deftype) { /* Before appending, ... */
1856: case ROFFDEF_PRE: /* copy predefined to user-defined. */
1857: roff_setstrn(&r->strtab, name, namesz,
1858: value, strlen(value), 0);
1859: break;
1860: case ROFFDEF_REN: /* call original standard macro. */
1861: csz = mandoc_asprintf(&call, ".%.*s \\$* \\\"\n",
1862: (int)strlen(value), value);
1863: roff_setstrn(&r->strtab, name, namesz, call, csz, 0);
1864: roff_setstrn(&r->rentab, name, namesz, NULL, 0, 0);
1865: free(call);
1866: break;
1867: case ROFFDEF_STD: /* rename and call standard macro. */
1868: rsz = mandoc_asprintf(&rname, "__%s_renamed", name);
1869: roff_setstrn(&r->rentab, rname, rsz, name, namesz, 0);
1870: csz = mandoc_asprintf(&call, ".%.*s \\$* \\\"\n",
1871: (int)rsz, rname);
1872: roff_setstrn(&r->strtab, name, namesz, call, csz, 0);
1873: free(call);
1874: free(rname);
1875: break;
1876: default:
1877: break;
1878: }
1.311 schwarze 1879: }
1.76 kristaps 1880:
1.238 schwarze 1881: if (*cp == '\0')
1.277 schwarze 1882: return ROFF_IGN;
1.78 kristaps 1883:
1.220 schwarze 1884: /* Get the custom end marker. */
1.107 kristaps 1885:
1.220 schwarze 1886: iname = cp;
1.213 schwarze 1887: namesz = roff_getname(r, &cp, ln, ppos);
1.220 schwarze 1888:
1889: /* Resolve the end marker if it is indirect. */
1890:
1.238 schwarze 1891: if (namesz && (tok == ROFF_dei || tok == ROFF_ami)) {
1.315 schwarze 1892: deftype = ROFFDEF_USER;
1893: name = roff_getstrn(r, iname, namesz, &deftype);
1894: if (name == NULL) {
1.220 schwarze 1895: mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.238 schwarze 1896: r->parse, ln, (int)(iname - buf->buf),
1.220 schwarze 1897: "%.*s", (int)namesz, iname);
1898: namesz = 0;
1899: } else
1900: namesz = strlen(name);
1901: } else
1902: name = iname;
1903:
1.213 schwarze 1904: if (namesz)
1905: r->last->end = mandoc_strndup(name, namesz);
1.78 kristaps 1906:
1.238 schwarze 1907: if (*cp != '\0')
1.217 schwarze 1908: mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse,
1.295 schwarze 1909: ln, pos, ".%s ... %s", roff_name[tok], cp);
1.74 kristaps 1910:
1.277 schwarze 1911: return ROFF_IGN;
1.78 kristaps 1912: }
1913:
1914: static enum rofferr
1.80 kristaps 1915: roff_block_sub(ROFF_ARGS)
1.79 kristaps 1916: {
1.294 schwarze 1917: enum roff_tok t;
1.79 kristaps 1918: int i, j;
1919:
1920: /*
1921: * First check whether a custom macro exists at this level. If
1922: * it does, then check against it. This is some of groff's
1923: * stranger behaviours. If we encountered a custom end-scope
1924: * tag and that tag also happens to be a "real" macro, then we
1925: * need to try interpreting it again as a real macro. If it's
1926: * not, then return ignore. Else continue.
1927: */
1928:
1929: if (r->last->end) {
1.130 kristaps 1930: for (i = pos, j = 0; r->last->end[j]; j++, i++)
1.238 schwarze 1931: if (buf->buf[i] != r->last->end[j])
1.79 kristaps 1932: break;
1933:
1.238 schwarze 1934: if (r->last->end[j] == '\0' &&
1935: (buf->buf[i] == '\0' ||
1936: buf->buf[i] == ' ' ||
1937: buf->buf[i] == '\t')) {
1.79 kristaps 1938: roffnode_pop(r);
1939: roffnode_cleanscope(r);
1940:
1.238 schwarze 1941: while (buf->buf[i] == ' ' || buf->buf[i] == '\t')
1.130 kristaps 1942: i++;
1943:
1944: pos = i;
1.238 schwarze 1945: if (roff_parse(r, buf->buf, &pos, ln, ppos) !=
1.294 schwarze 1946: TOKEN_NONE)
1.277 schwarze 1947: return ROFF_RERUN;
1948: return ROFF_IGN;
1.79 kristaps 1949: }
1950: }
1951:
1952: /*
1953: * If we have no custom end-query or lookup failed, then try
1954: * pulling it out of the hashtable.
1955: */
1956:
1.238 schwarze 1957: t = roff_parse(r, buf->buf, &pos, ln, ppos);
1.79 kristaps 1958:
1.238 schwarze 1959: if (t != ROFF_cblock) {
1960: if (tok != ROFF_ig)
1961: roff_setstr(r, r->last->name, buf->buf + ppos, 2);
1.277 schwarze 1962: return ROFF_IGN;
1.106 kristaps 1963: }
1.79 kristaps 1964:
1.277 schwarze 1965: return (*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs);
1.79 kristaps 1966: }
1967:
1968: static enum rofferr
1.80 kristaps 1969: roff_block_text(ROFF_ARGS)
1.78 kristaps 1970: {
1971:
1.238 schwarze 1972: if (tok != ROFF_ig)
1973: roff_setstr(r, r->last->name, buf->buf + pos, 2);
1.106 kristaps 1974:
1.277 schwarze 1975: return ROFF_IGN;
1.78 kristaps 1976: }
1977:
1978: static enum rofferr
1.82 kristaps 1979: roff_cond_sub(ROFF_ARGS)
1980: {
1.294 schwarze 1981: enum roff_tok t;
1.139 kristaps 1982: char *ep;
1.198 schwarze 1983: int rr;
1.82 kristaps 1984:
1985: rr = r->last->rule;
1.139 kristaps 1986: roffnode_cleanscope(r);
1.144 kristaps 1987:
1.196 schwarze 1988: /*
1989: * If `\}' occurs on a macro line without a preceding macro,
1990: * drop the line completely.
1991: */
1992:
1.238 schwarze 1993: ep = buf->buf + pos;
1994: if (ep[0] == '\\' && ep[1] == '}')
1.198 schwarze 1995: rr = 0;
1.196 schwarze 1996:
1.177 schwarze 1997: /* Always check for the closing delimiter `\}'. */
1.144 kristaps 1998:
1.238 schwarze 1999: while ((ep = strchr(ep, '\\')) != NULL) {
1.318 schwarze 2000: switch (ep[1]) {
2001: case '}':
2002: memmove(ep, ep + 2, strlen(ep + 2) + 1);
2003: roff_ccond(r, ln, ep - buf->buf);
2004: break;
2005: case '\0':
2006: ++ep;
2007: break;
2008: default:
2009: ep += 2;
2010: break;
1.197 schwarze 2011: }
1.177 schwarze 2012: }
1.318 schwarze 2013:
2014: /*
2015: * Fully handle known macros when they are structurally
2016: * required or when the conditional evaluated to true.
2017: */
2018:
2019: t = roff_parse(r, buf->buf, &pos, ln, ppos);
2020: return t != TOKEN_NONE && (rr || roffs[t].flags & ROFFMAC_STRUCT)
2021: ? (*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs) : rr
2022: ? ROFF_CONT : ROFF_IGN;
1.82 kristaps 2023: }
2024:
2025: static enum rofferr
2026: roff_cond_text(ROFF_ARGS)
1.78 kristaps 2027: {
1.140 kristaps 2028: char *ep;
1.198 schwarze 2029: int rr;
1.82 kristaps 2030:
2031: rr = r->last->rule;
1.140 kristaps 2032: roffnode_cleanscope(r);
1.82 kristaps 2033:
1.238 schwarze 2034: ep = buf->buf + pos;
2035: while ((ep = strchr(ep, '\\')) != NULL) {
2036: if (*(++ep) == '}') {
1.197 schwarze 2037: *ep = '&';
1.238 schwarze 2038: roff_ccond(r, ln, ep - buf->buf - 1);
1.197 schwarze 2039: }
1.247 schwarze 2040: if (*ep != '\0')
2041: ++ep;
1.78 kristaps 2042: }
1.277 schwarze 2043: return rr ? ROFF_CONT : ROFF_IGN;
1.74 kristaps 2044: }
2045:
1.266 schwarze 2046: /* --- handling of numeric and conditional expressions -------------------- */
2047:
1.204 schwarze 2048: /*
2049: * Parse a single signed integer number. Stop at the first non-digit.
2050: * If there is at least one digit, return success and advance the
2051: * parse point, else return failure and let the parse point unchanged.
2052: * Ignore overflows, treat them just like the C language.
2053: */
1.184 schwarze 2054: static int
1.261 schwarze 2055: roff_getnum(const char *v, int *pos, int *res, int flags)
1.184 schwarze 2056: {
1.261 schwarze 2057: int myres, scaled, n, p;
1.206 schwarze 2058:
2059: if (NULL == res)
2060: res = &myres;
1.184 schwarze 2061:
2062: p = *pos;
2063: n = v[p] == '-';
1.261 schwarze 2064: if (n || v[p] == '+')
1.184 schwarze 2065: p++;
2066:
1.261 schwarze 2067: if (flags & ROFFNUM_WHITE)
2068: while (isspace((unsigned char)v[p]))
2069: p++;
2070:
1.184 schwarze 2071: for (*res = 0; isdigit((unsigned char)v[p]); p++)
1.204 schwarze 2072: *res = 10 * *res + v[p] - '0';
1.184 schwarze 2073: if (p == *pos + n)
2074: return 0;
2075:
2076: if (n)
2077: *res = -*res;
2078:
1.254 schwarze 2079: /* Each number may be followed by one optional scaling unit. */
2080:
2081: switch (v[p]) {
2082: case 'f':
1.261 schwarze 2083: scaled = *res * 65536;
1.254 schwarze 2084: break;
2085: case 'i':
1.261 schwarze 2086: scaled = *res * 240;
1.254 schwarze 2087: break;
2088: case 'c':
1.261 schwarze 2089: scaled = *res * 240 / 2.54;
1.254 schwarze 2090: break;
2091: case 'v':
2092: case 'P':
1.261 schwarze 2093: scaled = *res * 40;
1.254 schwarze 2094: break;
2095: case 'm':
2096: case 'n':
1.261 schwarze 2097: scaled = *res * 24;
1.254 schwarze 2098: break;
2099: case 'p':
1.261 schwarze 2100: scaled = *res * 10 / 3;
1.254 schwarze 2101: break;
2102: case 'u':
1.261 schwarze 2103: scaled = *res;
1.254 schwarze 2104: break;
2105: case 'M':
1.261 schwarze 2106: scaled = *res * 6 / 25;
1.254 schwarze 2107: break;
2108: default:
1.261 schwarze 2109: scaled = *res;
1.254 schwarze 2110: p--;
2111: break;
2112: }
1.261 schwarze 2113: if (flags & ROFFNUM_SCALE)
2114: *res = scaled;
1.254 schwarze 2115:
2116: *pos = p + 1;
1.277 schwarze 2117: return 1;
1.184 schwarze 2118: }
2119:
1.198 schwarze 2120: /*
2121: * Evaluate a string comparison condition.
2122: * The first character is the delimiter.
2123: * Succeed if the string up to its second occurrence
2124: * matches the string up to its third occurence.
2125: * Advance the cursor after the third occurrence
2126: * or lacking that, to the end of the line.
2127: */
2128: static int
2129: roff_evalstrcond(const char *v, int *pos)
2130: {
2131: const char *s1, *s2, *s3;
2132: int match;
2133:
2134: match = 0;
2135: s1 = v + *pos; /* initial delimiter */
2136: s2 = s1 + 1; /* for scanning the first string */
2137: s3 = strchr(s2, *s1); /* for scanning the second string */
2138:
2139: if (NULL == s3) /* found no middle delimiter */
2140: goto out;
2141:
2142: while ('\0' != *++s3) {
2143: if (*s2 != *s3) { /* mismatch */
2144: s3 = strchr(s3, *s1);
2145: break;
2146: }
2147: if (*s3 == *s1) { /* found the final delimiter */
2148: match = 1;
2149: break;
2150: }
2151: s2++;
2152: }
2153:
2154: out:
2155: if (NULL == s3)
2156: s3 = strchr(s2, '\0');
1.242 schwarze 2157: else if (*s3 != '\0')
1.198 schwarze 2158: s3++;
2159: *pos = s3 - v;
1.277 schwarze 2160: return match;
1.198 schwarze 2161: }
2162:
1.204 schwarze 2163: /*
2164: * Evaluate an optionally negated single character, numerical,
2165: * or string condition.
2166: */
1.198 schwarze 2167: static int
1.271 schwarze 2168: roff_evalcond(struct roff *r, int ln, char *v, int *pos)
1.88 kristaps 2169: {
1.271 schwarze 2170: char *cp, *name;
2171: size_t sz;
1.315 schwarze 2172: int deftype, number, savepos, istrue, wanttrue;
1.88 kristaps 2173:
1.198 schwarze 2174: if ('!' == v[*pos]) {
2175: wanttrue = 0;
2176: (*pos)++;
2177: } else
2178: wanttrue = 1;
2179:
1.88 kristaps 2180: switch (v[*pos]) {
1.240 schwarze 2181: case '\0':
1.277 schwarze 2182: return 0;
1.207 schwarze 2183: case 'n':
2184: case 'o':
1.88 kristaps 2185: (*pos)++;
1.277 schwarze 2186: return wanttrue;
1.207 schwarze 2187: case 'c':
2188: case 'e':
2189: case 't':
1.239 schwarze 2190: case 'v':
1.88 kristaps 2191: (*pos)++;
1.277 schwarze 2192: return !wanttrue;
1.310 schwarze 2193: case 'd':
1.271 schwarze 2194: case 'r':
1.310 schwarze 2195: cp = v + *pos + 1;
2196: while (*cp == ' ')
2197: cp++;
2198: name = cp;
2199: sz = roff_getname(r, &cp, ln, cp - v);
1.315 schwarze 2200: if (sz == 0)
2201: istrue = 0;
2202: else if (v[*pos] == 'r')
2203: istrue = roff_hasregn(r, name, sz);
2204: else {
2205: deftype = ROFFDEF_ANY;
2206: roff_getstrn(r, name, sz, &deftype);
2207: istrue = !!deftype;
2208: }
1.271 schwarze 2209: *pos = cp - v;
1.310 schwarze 2210: return istrue == wanttrue;
1.88 kristaps 2211: default:
2212: break;
2213: }
2214:
1.241 schwarze 2215: savepos = *pos;
1.261 schwarze 2216: if (roff_evalnum(r, ln, v, pos, &number, ROFFNUM_SCALE))
1.277 schwarze 2217: return (number > 0) == wanttrue;
1.241 schwarze 2218: else if (*pos == savepos)
1.277 schwarze 2219: return roff_evalstrcond(v, pos) == wanttrue;
1.204 schwarze 2220: else
1.277 schwarze 2221: return 0;
1.88 kristaps 2222: }
2223:
1.74 kristaps 2224: static enum rofferr
1.103 kristaps 2225: roff_line_ignore(ROFF_ARGS)
1.89 kristaps 2226: {
1.123 schwarze 2227:
1.277 schwarze 2228: return ROFF_IGN;
1.89 kristaps 2229: }
2230:
1.104 kristaps 2231: static enum rofferr
1.251 schwarze 2232: roff_insec(ROFF_ARGS)
2233: {
2234:
2235: mandoc_msg(MANDOCERR_REQ_INSEC, r->parse,
1.295 schwarze 2236: ln, ppos, roff_name[tok]);
1.277 schwarze 2237: return ROFF_IGN;
1.251 schwarze 2238: }
2239:
2240: static enum rofferr
2241: roff_unsupp(ROFF_ARGS)
2242: {
2243:
2244: mandoc_msg(MANDOCERR_REQ_UNSUPP, r->parse,
1.295 schwarze 2245: ln, ppos, roff_name[tok]);
1.277 schwarze 2246: return ROFF_IGN;
1.251 schwarze 2247: }
2248:
2249: static enum rofferr
1.82 kristaps 2250: roff_cond(ROFF_ARGS)
1.74 kristaps 2251: {
1.173 schwarze 2252:
2253: roffnode_push(r, tok, NULL, ln, ppos);
1.74 kristaps 2254:
1.207 schwarze 2255: /*
1.134 kristaps 2256: * An `.el' has no conditional body: it will consume the value
2257: * of the current rstack entry set in prior `ie' calls or
1.207 schwarze 2258: * defaults to DENY.
1.134 kristaps 2259: *
2260: * If we're not an `el', however, then evaluate the conditional.
2261: */
1.133 kristaps 2262:
1.238 schwarze 2263: r->last->rule = tok == ROFF_el ?
1.207 schwarze 2264: (r->rstackpos < 0 ? 0 : r->rstack[r->rstackpos--]) :
1.238 schwarze 2265: roff_evalcond(r, ln, buf->buf, &pos);
1.77 kristaps 2266:
1.134 kristaps 2267: /*
2268: * An if-else will put the NEGATION of the current evaluated
2269: * conditional into the stack of rules.
2270: */
2271:
1.238 schwarze 2272: if (tok == ROFF_ie) {
1.223 schwarze 2273: if (r->rstackpos + 1 == r->rstacksz) {
2274: r->rstacksz += 16;
2275: r->rstack = mandoc_reallocarray(r->rstack,
2276: r->rstacksz, sizeof(int));
1.134 kristaps 2277: }
1.198 schwarze 2278: r->rstack[++r->rstackpos] = !r->last->rule;
1.82 kristaps 2279: }
1.88 kristaps 2280:
2281: /* If the parent has false as its rule, then so do we. */
2282:
1.198 schwarze 2283: if (r->last->parent && !r->last->parent->rule)
2284: r->last->rule = 0;
1.88 kristaps 2285:
2286: /*
1.173 schwarze 2287: * Determine scope.
2288: * If there is nothing on the line after the conditional,
2289: * not even whitespace, use next-line scope.
1.88 kristaps 2290: */
1.74 kristaps 2291:
1.238 schwarze 2292: if (buf->buf[pos] == '\0') {
1.173 schwarze 2293: r->last->endspan = 2;
2294: goto out;
2295: }
2296:
1.238 schwarze 2297: while (buf->buf[pos] == ' ')
1.173 schwarze 2298: pos++;
2299:
2300: /* An opening brace requests multiline scope. */
1.75 kristaps 2301:
1.238 schwarze 2302: if (buf->buf[pos] == '\\' && buf->buf[pos + 1] == '{') {
1.75 kristaps 2303: r->last->endspan = -1;
2304: pos += 2;
1.272 schwarze 2305: while (buf->buf[pos] == ' ')
2306: pos++;
1.173 schwarze 2307: goto out;
1.207 schwarze 2308: }
1.74 kristaps 2309:
1.77 kristaps 2310: /*
1.173 schwarze 2311: * Anything else following the conditional causes
2312: * single-line scope. Warn if the scope contains
2313: * nothing but trailing whitespace.
1.77 kristaps 2314: */
2315:
1.238 schwarze 2316: if (buf->buf[pos] == '\0')
1.216 schwarze 2317: mandoc_msg(MANDOCERR_COND_EMPTY, r->parse,
1.295 schwarze 2318: ln, ppos, roff_name[tok]);
1.77 kristaps 2319:
1.173 schwarze 2320: r->last->endspan = 1;
1.74 kristaps 2321:
1.173 schwarze 2322: out:
1.75 kristaps 2323: *offs = pos;
1.277 schwarze 2324: return ROFF_RERUN;
1.83 schwarze 2325: }
2326:
2327: static enum rofferr
1.92 schwarze 2328: roff_ds(ROFF_ARGS)
2329: {
1.212 schwarze 2330: char *string;
2331: const char *name;
2332: size_t namesz;
1.96 kristaps 2333:
1.251 schwarze 2334: /* Ignore groff compatibility mode for now. */
2335:
2336: if (tok == ROFF_ds1)
2337: tok = ROFF_ds;
2338: else if (tok == ROFF_as1)
2339: tok = ROFF_as;
2340:
1.96 kristaps 2341: /*
1.212 schwarze 2342: * The first word is the name of the string.
2343: * If it is empty or terminated by an escape sequence,
2344: * abort the `ds' request without defining anything.
1.96 kristaps 2345: */
1.92 schwarze 2346:
1.238 schwarze 2347: name = string = buf->buf + pos;
2348: if (*name == '\0')
1.277 schwarze 2349: return ROFF_IGN;
1.92 schwarze 2350:
1.212 schwarze 2351: namesz = roff_getname(r, &string, ln, pos);
1.238 schwarze 2352: if (name[namesz] == '\\')
1.277 schwarze 2353: return ROFF_IGN;
1.212 schwarze 2354:
2355: /* Read past the initial double-quote, if any. */
1.238 schwarze 2356: if (*string == '"')
1.92 schwarze 2357: string++;
2358:
1.96 kristaps 2359: /* The rest is the value. */
1.212 schwarze 2360: roff_setstrn(&r->strtab, name, namesz, string, strlen(string),
2361: ROFF_as == tok);
1.311 schwarze 2362: roff_setstrn(&r->rentab, name, namesz, NULL, 0, 0);
1.277 schwarze 2363: return ROFF_IGN;
1.92 schwarze 2364: }
2365:
1.204 schwarze 2366: /*
2367: * Parse a single operator, one or two characters long.
2368: * If the operator is recognized, return success and advance the
2369: * parse point, else return failure and let the parse point unchanged.
2370: */
2371: static int
2372: roff_getop(const char *v, int *pos, char *res)
2373: {
2374:
2375: *res = v[*pos];
2376:
2377: switch (*res) {
1.207 schwarze 2378: case '+':
2379: case '-':
2380: case '*':
2381: case '/':
2382: case '%':
2383: case '&':
2384: case ':':
1.204 schwarze 2385: break;
2386: case '<':
2387: switch (v[*pos + 1]) {
1.207 schwarze 2388: case '=':
1.204 schwarze 2389: *res = 'l';
2390: (*pos)++;
2391: break;
1.207 schwarze 2392: case '>':
1.204 schwarze 2393: *res = '!';
2394: (*pos)++;
2395: break;
1.207 schwarze 2396: case '?':
1.204 schwarze 2397: *res = 'i';
2398: (*pos)++;
2399: break;
2400: default:
2401: break;
2402: }
2403: break;
2404: case '>':
2405: switch (v[*pos + 1]) {
1.207 schwarze 2406: case '=':
1.204 schwarze 2407: *res = 'g';
2408: (*pos)++;
2409: break;
1.207 schwarze 2410: case '?':
1.204 schwarze 2411: *res = 'a';
2412: (*pos)++;
2413: break;
2414: default:
2415: break;
2416: }
2417: break;
2418: case '=':
2419: if ('=' == v[*pos + 1])
2420: (*pos)++;
2421: break;
2422: default:
1.277 schwarze 2423: return 0;
1.204 schwarze 2424: }
2425: (*pos)++;
2426:
1.277 schwarze 2427: return *res;
1.204 schwarze 2428: }
2429:
2430: /*
2431: * Evaluate either a parenthesized numeric expression
2432: * or a single signed integer number.
2433: */
2434: static int
1.235 schwarze 2435: roff_evalpar(struct roff *r, int ln,
1.261 schwarze 2436: const char *v, int *pos, int *res, int flags)
1.204 schwarze 2437: {
2438:
2439: if ('(' != v[*pos])
1.277 schwarze 2440: return roff_getnum(v, pos, res, flags);
1.204 schwarze 2441:
2442: (*pos)++;
1.261 schwarze 2443: if ( ! roff_evalnum(r, ln, v, pos, res, flags | ROFFNUM_WHITE))
1.277 schwarze 2444: return 0;
1.204 schwarze 2445:
1.206 schwarze 2446: /*
2447: * Omission of the closing parenthesis
2448: * is an error in validation mode,
2449: * but ignored in evaluation mode.
2450: */
2451:
1.204 schwarze 2452: if (')' == v[*pos])
2453: (*pos)++;
1.206 schwarze 2454: else if (NULL == res)
1.277 schwarze 2455: return 0;
1.204 schwarze 2456:
1.277 schwarze 2457: return 1;
1.204 schwarze 2458: }
2459:
2460: /*
2461: * Evaluate a complete numeric expression.
2462: * Proceed left to right, there is no concept of precedence.
2463: */
2464: static int
1.235 schwarze 2465: roff_evalnum(struct roff *r, int ln, const char *v,
1.261 schwarze 2466: int *pos, int *res, int flags)
1.204 schwarze 2467: {
2468: int mypos, operand2;
2469: char operator;
2470:
2471: if (NULL == pos) {
2472: mypos = 0;
2473: pos = &mypos;
2474: }
2475:
1.261 schwarze 2476: if (flags & ROFFNUM_WHITE)
1.204 schwarze 2477: while (isspace((unsigned char)v[*pos]))
2478: (*pos)++;
2479:
1.261 schwarze 2480: if ( ! roff_evalpar(r, ln, v, pos, res, flags))
1.277 schwarze 2481: return 0;
1.204 schwarze 2482:
2483: while (1) {
1.261 schwarze 2484: if (flags & ROFFNUM_WHITE)
1.204 schwarze 2485: while (isspace((unsigned char)v[*pos]))
2486: (*pos)++;
2487:
2488: if ( ! roff_getop(v, pos, &operator))
2489: break;
2490:
1.261 schwarze 2491: if (flags & ROFFNUM_WHITE)
1.204 schwarze 2492: while (isspace((unsigned char)v[*pos]))
2493: (*pos)++;
2494:
1.261 schwarze 2495: if ( ! roff_evalpar(r, ln, v, pos, &operand2, flags))
1.277 schwarze 2496: return 0;
1.204 schwarze 2497:
1.261 schwarze 2498: if (flags & ROFFNUM_WHITE)
1.204 schwarze 2499: while (isspace((unsigned char)v[*pos]))
2500: (*pos)++;
1.206 schwarze 2501:
2502: if (NULL == res)
2503: continue;
1.204 schwarze 2504:
2505: switch (operator) {
1.207 schwarze 2506: case '+':
1.204 schwarze 2507: *res += operand2;
2508: break;
1.207 schwarze 2509: case '-':
1.204 schwarze 2510: *res -= operand2;
2511: break;
1.207 schwarze 2512: case '*':
1.204 schwarze 2513: *res *= operand2;
2514: break;
1.207 schwarze 2515: case '/':
1.244 schwarze 2516: if (operand2 == 0) {
1.235 schwarze 2517: mandoc_msg(MANDOCERR_DIVZERO,
1.234 kristaps 2518: r->parse, ln, *pos, v);
2519: *res = 0;
2520: break;
2521: }
1.204 schwarze 2522: *res /= operand2;
2523: break;
1.207 schwarze 2524: case '%':
1.244 schwarze 2525: if (operand2 == 0) {
2526: mandoc_msg(MANDOCERR_DIVZERO,
2527: r->parse, ln, *pos, v);
2528: *res = 0;
2529: break;
2530: }
1.204 schwarze 2531: *res %= operand2;
2532: break;
1.207 schwarze 2533: case '<':
1.204 schwarze 2534: *res = *res < operand2;
2535: break;
1.207 schwarze 2536: case '>':
1.204 schwarze 2537: *res = *res > operand2;
2538: break;
1.207 schwarze 2539: case 'l':
1.204 schwarze 2540: *res = *res <= operand2;
2541: break;
1.207 schwarze 2542: case 'g':
1.204 schwarze 2543: *res = *res >= operand2;
2544: break;
1.207 schwarze 2545: case '=':
1.204 schwarze 2546: *res = *res == operand2;
2547: break;
1.207 schwarze 2548: case '!':
1.204 schwarze 2549: *res = *res != operand2;
2550: break;
1.207 schwarze 2551: case '&':
1.204 schwarze 2552: *res = *res && operand2;
2553: break;
1.207 schwarze 2554: case ':':
1.204 schwarze 2555: *res = *res || operand2;
2556: break;
1.207 schwarze 2557: case 'i':
1.204 schwarze 2558: if (operand2 < *res)
2559: *res = operand2;
2560: break;
1.207 schwarze 2561: case 'a':
1.204 schwarze 2562: if (operand2 > *res)
2563: *res = operand2;
2564: break;
2565: default:
2566: abort();
2567: }
2568: }
1.277 schwarze 2569: return 1;
1.204 schwarze 2570: }
2571:
1.266 schwarze 2572: /* --- register management ------------------------------------------------ */
2573:
1.180 schwarze 2574: void
1.187 schwarze 2575: roff_setreg(struct roff *r, const char *name, int val, char sign)
1.147 kristaps 2576: {
1.327 schwarze 2577: roff_setregn(r, name, strlen(name), val, sign, INT_MIN);
1.326 schwarze 2578: }
2579:
2580: static void
2581: roff_setregn(struct roff *r, const char *name, size_t len,
1.327 schwarze 2582: int val, char sign, int step)
1.326 schwarze 2583: {
1.180 schwarze 2584: struct roffreg *reg;
2585:
2586: /* Search for an existing register with the same name. */
2587: reg = r->regtab;
2588:
1.326 schwarze 2589: while (reg != NULL && (reg->key.sz != len ||
2590: strncmp(reg->key.p, name, len) != 0))
1.180 schwarze 2591: reg = reg->next;
1.147 kristaps 2592:
1.180 schwarze 2593: if (NULL == reg) {
2594: /* Create a new register. */
2595: reg = mandoc_malloc(sizeof(struct roffreg));
1.326 schwarze 2596: reg->key.p = mandoc_strndup(name, len);
2597: reg->key.sz = len;
1.187 schwarze 2598: reg->val = 0;
1.327 schwarze 2599: reg->step = 0;
1.180 schwarze 2600: reg->next = r->regtab;
2601: r->regtab = reg;
2602: }
2603:
1.187 schwarze 2604: if ('+' == sign)
2605: reg->val += val;
2606: else if ('-' == sign)
2607: reg->val -= val;
2608: else
2609: reg->val = val;
1.327 schwarze 2610: if (step != INT_MIN)
2611: reg->step = step;
1.147 kristaps 2612: }
2613:
1.192 schwarze 2614: /*
2615: * Handle some predefined read-only number registers.
2616: * For now, return -1 if the requested register is not predefined;
2617: * in case a predefined read-only register having the value -1
2618: * were to turn up, another special value would have to be chosen.
2619: */
2620: static int
1.273 schwarze 2621: roff_getregro(const struct roff *r, const char *name)
1.192 schwarze 2622: {
2623:
2624: switch (*name) {
1.273 schwarze 2625: case '$': /* Number of arguments of the last macro evaluated. */
1.277 schwarze 2626: return r->argc;
1.207 schwarze 2627: case 'A': /* ASCII approximation mode is always off. */
1.277 schwarze 2628: return 0;
1.207 schwarze 2629: case 'g': /* Groff compatibility mode is always on. */
1.277 schwarze 2630: return 1;
1.207 schwarze 2631: case 'H': /* Fixed horizontal resolution. */
1.277 schwarze 2632: return 24;
1.207 schwarze 2633: case 'j': /* Always adjust left margin only. */
1.277 schwarze 2634: return 0;
1.207 schwarze 2635: case 'T': /* Some output device is always defined. */
1.277 schwarze 2636: return 1;
1.207 schwarze 2637: case 'V': /* Fixed vertical resolution. */
1.277 schwarze 2638: return 40;
1.192 schwarze 2639: default:
1.277 schwarze 2640: return -1;
1.192 schwarze 2641: }
2642: }
2643:
1.181 schwarze 2644: int
1.326 schwarze 2645: roff_getreg(struct roff *r, const char *name)
1.147 kristaps 2646: {
1.327 schwarze 2647: return roff_getregn(r, name, strlen(name), '\0');
1.181 schwarze 2648: }
2649:
2650: static int
1.327 schwarze 2651: roff_getregn(struct roff *r, const char *name, size_t len, char sign)
1.181 schwarze 2652: {
2653: struct roffreg *reg;
1.192 schwarze 2654: int val;
2655:
2656: if ('.' == name[0] && 2 == len) {
1.273 schwarze 2657: val = roff_getregro(r, name + 1);
1.192 schwarze 2658: if (-1 != val)
1.277 schwarze 2659: return val;
1.192 schwarze 2660: }
1.181 schwarze 2661:
1.327 schwarze 2662: for (reg = r->regtab; reg; reg = reg->next) {
1.181 schwarze 2663: if (len == reg->key.sz &&
1.327 schwarze 2664: 0 == strncmp(name, reg->key.p, len)) {
2665: switch (sign) {
2666: case '+':
2667: reg->val += reg->step;
2668: break;
2669: case '-':
2670: reg->val -= reg->step;
2671: break;
2672: default:
2673: break;
2674: }
1.277 schwarze 2675: return reg->val;
1.327 schwarze 2676: }
2677: }
1.271 schwarze 2678:
1.327 schwarze 2679: roff_setregn(r, name, len, 0, '\0', INT_MIN);
1.277 schwarze 2680: return 0;
1.271 schwarze 2681: }
2682:
2683: static int
2684: roff_hasregn(const struct roff *r, const char *name, size_t len)
2685: {
2686: struct roffreg *reg;
2687: int val;
2688:
2689: if ('.' == name[0] && 2 == len) {
1.273 schwarze 2690: val = roff_getregro(r, name + 1);
1.271 schwarze 2691: if (-1 != val)
1.277 schwarze 2692: return 1;
1.271 schwarze 2693: }
2694:
2695: for (reg = r->regtab; reg; reg = reg->next)
2696: if (len == reg->key.sz &&
2697: 0 == strncmp(name, reg->key.p, len))
1.277 schwarze 2698: return 1;
1.147 kristaps 2699:
1.277 schwarze 2700: return 0;
1.147 kristaps 2701: }
2702:
1.180 schwarze 2703: static void
2704: roff_freereg(struct roffreg *reg)
1.147 kristaps 2705: {
1.180 schwarze 2706: struct roffreg *old_reg;
1.147 kristaps 2707:
1.180 schwarze 2708: while (NULL != reg) {
2709: free(reg->key.p);
2710: old_reg = reg;
2711: reg = reg->next;
2712: free(old_reg);
2713: }
1.147 kristaps 2714: }
1.92 schwarze 2715:
2716: static enum rofferr
1.89 kristaps 2717: roff_nr(ROFF_ARGS)
1.83 schwarze 2718: {
1.327 schwarze 2719: char *key, *val, *step;
1.212 schwarze 2720: size_t keysz;
1.327 schwarze 2721: int iv, is, len;
1.187 schwarze 2722: char sign;
1.89 kristaps 2723:
1.238 schwarze 2724: key = val = buf->buf + pos;
2725: if (*key == '\0')
1.277 schwarze 2726: return ROFF_IGN;
1.212 schwarze 2727:
2728: keysz = roff_getname(r, &val, ln, pos);
1.238 schwarze 2729: if (key[keysz] == '\\')
1.277 schwarze 2730: return ROFF_IGN;
1.89 kristaps 2731:
1.187 schwarze 2732: sign = *val;
1.238 schwarze 2733: if (sign == '+' || sign == '-')
1.187 schwarze 2734: val++;
2735:
1.327 schwarze 2736: len = 0;
2737: if (roff_evalnum(r, ln, val, &len, &iv, ROFFNUM_SCALE) == 0)
2738: return ROFF_IGN;
2739:
2740: step = val + len;
2741: while (isspace((unsigned char)*step))
2742: step++;
2743: if (roff_evalnum(r, ln, step, NULL, &is, 0) == 0)
2744: is = INT_MIN;
1.109 kristaps 2745:
1.327 schwarze 2746: roff_setregn(r, key, keysz, iv, sign, is);
1.277 schwarze 2747: return ROFF_IGN;
1.203 schwarze 2748: }
2749:
2750: static enum rofferr
2751: roff_rr(ROFF_ARGS)
2752: {
2753: struct roffreg *reg, **prev;
1.212 schwarze 2754: char *name, *cp;
2755: size_t namesz;
1.203 schwarze 2756:
1.238 schwarze 2757: name = cp = buf->buf + pos;
2758: if (*name == '\0')
1.277 schwarze 2759: return ROFF_IGN;
1.212 schwarze 2760: namesz = roff_getname(r, &cp, ln, pos);
2761: name[namesz] = '\0';
1.203 schwarze 2762:
2763: prev = &r->regtab;
2764: while (1) {
2765: reg = *prev;
1.238 schwarze 2766: if (reg == NULL || !strcmp(name, reg->key.p))
1.203 schwarze 2767: break;
2768: prev = ®->next;
2769: }
1.238 schwarze 2770: if (reg != NULL) {
1.203 schwarze 2771: *prev = reg->next;
2772: free(reg->key.p);
2773: free(reg);
2774: }
1.277 schwarze 2775: return ROFF_IGN;
1.122 schwarze 2776: }
2777:
1.266 schwarze 2778: /* --- handler functions for roff requests -------------------------------- */
2779:
1.122 schwarze 2780: static enum rofferr
2781: roff_rm(ROFF_ARGS)
2782: {
2783: const char *name;
2784: char *cp;
1.212 schwarze 2785: size_t namesz;
1.122 schwarze 2786:
1.238 schwarze 2787: cp = buf->buf + pos;
2788: while (*cp != '\0') {
1.212 schwarze 2789: name = cp;
1.238 schwarze 2790: namesz = roff_getname(r, &cp, ln, (int)(cp - buf->buf));
1.212 schwarze 2791: roff_setstrn(&r->strtab, name, namesz, NULL, 0, 0);
1.311 schwarze 2792: roff_setstrn(&r->rentab, name, namesz, NULL, 0, 0);
1.238 schwarze 2793: if (name[namesz] == '\\')
1.212 schwarze 2794: break;
1.122 schwarze 2795: }
1.277 schwarze 2796: return ROFF_IGN;
1.178 schwarze 2797: }
2798:
2799: static enum rofferr
2800: roff_it(ROFF_ARGS)
2801: {
2802: int iv;
2803:
2804: /* Parse the number of lines. */
1.261 schwarze 2805:
2806: if ( ! roff_evalnum(r, ln, buf->buf, &pos, &iv, 0)) {
1.222 schwarze 2807: mandoc_msg(MANDOCERR_IT_NONUM, r->parse,
1.238 schwarze 2808: ln, ppos, buf->buf + 1);
1.277 schwarze 2809: return ROFF_IGN;
1.178 schwarze 2810: }
2811:
1.262 schwarze 2812: while (isspace((unsigned char)buf->buf[pos]))
2813: pos++;
2814:
2815: /*
2816: * Arm the input line trap.
2817: * Special-casing "an-trap" is an ugly workaround to cope
2818: * with DocBook stupidly fiddling with man(7) internals.
2819: */
1.261 schwarze 2820:
1.178 schwarze 2821: roffit_lines = iv;
1.262 schwarze 2822: roffit_macro = mandoc_strdup(iv != 1 ||
2823: strcmp(buf->buf + pos, "an-trap") ?
2824: buf->buf + pos : "br");
1.277 schwarze 2825: return ROFF_IGN;
1.175 schwarze 2826: }
2827:
2828: static enum rofferr
2829: roff_Dd(ROFF_ARGS)
2830: {
1.315 schwarze 2831: int mask;
2832: enum roff_tok t, te;
1.227 schwarze 2833:
1.315 schwarze 2834: switch (tok) {
2835: case ROFF_Dd:
2836: tok = MDOC_Dd;
2837: te = MDOC_MAX;
2838: if (r->format == 0)
2839: r->format = MPARSE_MDOC;
2840: mask = MPARSE_MDOC | MPARSE_QUICK;
2841: break;
2842: case ROFF_TH:
2843: tok = MAN_TH;
2844: te = MAN_MAX;
2845: if (r->format == 0)
2846: r->format = MPARSE_MAN;
2847: mask = MPARSE_QUICK;
2848: break;
2849: default:
2850: abort();
2851: }
2852: if ((r->options & mask) == 0)
2853: for (t = tok; t < te; t++)
2854: roff_setstr(r, roff_name[t], NULL, 0);
1.277 schwarze 2855: return ROFF_CONT;
1.109 kristaps 2856: }
2857:
2858: static enum rofferr
2859: roff_TE(ROFF_ARGS)
2860: {
1.321 schwarze 2861: if (r->tbl == NULL) {
1.221 schwarze 2862: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
2863: ln, ppos, "TE");
1.321 schwarze 2864: return ROFF_IGN;
2865: }
2866: if (tbl_end(r->tbl) == 0) {
2867: r->tbl = NULL;
1.258 schwarze 2868: free(buf->buf);
2869: buf->buf = mandoc_strdup(".sp");
2870: buf->sz = 4;
1.329 schwarze 2871: *offs = 0;
1.277 schwarze 2872: return ROFF_REPARSE;
1.258 schwarze 2873: }
1.321 schwarze 2874: r->tbl = NULL;
1.277 schwarze 2875: return ROFF_IGN;
1.112 kristaps 2876: }
2877:
2878: static enum rofferr
2879: roff_T_(ROFF_ARGS)
2880: {
2881:
2882: if (NULL == r->tbl)
1.221 schwarze 2883: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
2884: ln, ppos, "T&");
1.112 kristaps 2885: else
1.296 schwarze 2886: tbl_restart(ln, ppos, r->tbl);
1.112 kristaps 2887:
1.277 schwarze 2888: return ROFF_IGN;
1.109 kristaps 2889: }
2890:
1.230 schwarze 2891: /*
2892: * Handle in-line equation delimiters.
2893: */
2894: static enum rofferr
1.238 schwarze 2895: roff_eqndelim(struct roff *r, struct buf *buf, int pos)
1.151 kristaps 2896: {
1.233 schwarze 2897: char *cp1, *cp2;
2898: const char *bef_pr, *bef_nl, *mac, *aft_nl, *aft_pr;
1.151 kristaps 2899:
1.230 schwarze 2900: /*
2901: * Outside equations, look for an opening delimiter.
2902: * If we are inside an equation, we already know it is
2903: * in-line, or this function wouldn't have been called;
2904: * so look for a closing delimiter.
2905: */
2906:
1.238 schwarze 2907: cp1 = buf->buf + pos;
1.230 schwarze 2908: cp2 = strchr(cp1, r->eqn == NULL ?
2909: r->last_eqn->odelim : r->last_eqn->cdelim);
2910: if (cp2 == NULL)
1.277 schwarze 2911: return ROFF_CONT;
1.230 schwarze 2912:
1.233 schwarze 2913: *cp2++ = '\0';
2914: bef_pr = bef_nl = aft_nl = aft_pr = "";
2915:
2916: /* Handle preceding text, protecting whitespace. */
2917:
1.238 schwarze 2918: if (*buf->buf != '\0') {
1.233 schwarze 2919: if (r->eqn == NULL)
2920: bef_pr = "\\&";
2921: bef_nl = "\n";
2922: }
2923:
2924: /*
2925: * Prepare replacing the delimiter with an equation macro
2926: * and drop leading white space from the equation.
2927: */
1.230 schwarze 2928:
1.233 schwarze 2929: if (r->eqn == NULL) {
2930: while (*cp2 == ' ')
2931: cp2++;
2932: mac = ".EQ";
2933: } else
2934: mac = ".EN";
2935:
2936: /* Handle following text, protecting whitespace. */
2937:
2938: if (*cp2 != '\0') {
2939: aft_nl = "\n";
2940: if (r->eqn != NULL)
2941: aft_pr = "\\&";
2942: }
2943:
2944: /* Do the actual replacement. */
2945:
1.238 schwarze 2946: buf->sz = mandoc_asprintf(&cp1, "%s%s%s%s%s%s%s", buf->buf,
1.233 schwarze 2947: bef_pr, bef_nl, mac, aft_nl, aft_pr, cp2) + 1;
1.238 schwarze 2948: free(buf->buf);
2949: buf->buf = cp1;
1.230 schwarze 2950:
2951: /* Toggle the in-line state of the eqn subsystem. */
2952:
2953: r->eqn_inline = r->eqn == NULL;
1.277 schwarze 2954: return ROFF_REPARSE;
1.151 kristaps 2955: }
2956:
1.235 schwarze 2957: static enum rofferr
2958: roff_EQ(ROFF_ARGS)
1.125 kristaps 2959: {
1.319 schwarze 2960: struct roff_node *n;
2961:
1.322 schwarze 2962: if (r->man->macroset == MACROSET_MAN)
2963: man_breakscope(r->man, ROFF_EQ);
1.319 schwarze 2964: n = roff_node_alloc(r->man, ln, ppos, ROFFT_EQN, TOKEN_NONE);
2965: if (ln > r->man->last->line)
2966: n->flags |= NODE_LINE;
2967: n->eqn = mandoc_calloc(1, sizeof(*n->eqn));
2968: n->eqn->expectargs = UINT_MAX;
2969: roff_node_append(r->man, n);
2970: r->man->next = ROFF_NEXT_SIBLING;
1.125 kristaps 2971:
1.238 schwarze 2972: assert(r->eqn == NULL);
1.319 schwarze 2973: if (r->last_eqn == NULL)
2974: r->last_eqn = eqn_alloc(r->parse);
2975: else
2976: eqn_reset(r->last_eqn);
2977: r->eqn = r->last_eqn;
2978: r->eqn->node = n;
1.151 kristaps 2979:
1.238 schwarze 2980: if (buf->buf[pos] != '\0')
1.235 schwarze 2981: mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
1.238 schwarze 2982: ".EQ %s", buf->buf + pos);
1.151 kristaps 2983:
1.277 schwarze 2984: return ROFF_IGN;
1.125 kristaps 2985: }
2986:
2987: static enum rofferr
2988: roff_EN(ROFF_ARGS)
2989: {
1.319 schwarze 2990: if (r->eqn != NULL) {
2991: eqn_parse(r->eqn);
2992: r->eqn = NULL;
2993: } else
2994: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse, ln, ppos, "EN");
2995: if (buf->buf[pos] != '\0')
2996: mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
2997: "EN %s", buf->buf + pos);
1.277 schwarze 2998: return ROFF_IGN;
1.125 kristaps 2999: }
3000:
3001: static enum rofferr
1.109 kristaps 3002: roff_TS(ROFF_ARGS)
3003: {
1.321 schwarze 3004: if (r->tbl != NULL) {
1.221 schwarze 3005: mandoc_msg(MANDOCERR_BLK_BROKEN, r->parse,
3006: ln, ppos, "TS breaks TS");
1.321 schwarze 3007: tbl_end(r->tbl);
1.115 kristaps 3008: }
1.321 schwarze 3009: r->tbl = tbl_alloc(ppos, ln, r->parse);
1.113 kristaps 3010: if (r->last_tbl)
1.321 schwarze 3011: r->last_tbl->next = r->tbl;
1.113 kristaps 3012: else
1.321 schwarze 3013: r->first_tbl = r->tbl;
3014: r->last_tbl = r->tbl;
1.297 schwarze 3015: return ROFF_IGN;
3016: }
3017:
3018: static enum rofferr
3019: roff_onearg(ROFF_ARGS)
3020: {
3021: struct roff_node *n;
3022: char *cp;
1.305 schwarze 3023: int npos;
1.297 schwarze 3024:
1.302 schwarze 3025: if (r->man->flags & (MAN_BLINE | MAN_ELINE) &&
1.320 schwarze 3026: (tok == ROFF_ce || tok == ROFF_rj || tok == ROFF_sp ||
3027: tok == ROFF_ti))
1.302 schwarze 3028: man_breakscope(r->man, tok);
3029:
1.309 schwarze 3030: if (roffce_node != NULL && (tok == ROFF_ce || tok == ROFF_rj)) {
1.305 schwarze 3031: r->man->last = roffce_node;
3032: r->man->next = ROFF_NEXT_SIBLING;
3033: }
3034:
1.297 schwarze 3035: roff_elem_alloc(r->man, ln, ppos, tok);
3036: n = r->man->last;
3037:
3038: cp = buf->buf + pos;
3039: if (*cp != '\0') {
3040: while (*cp != '\0' && *cp != ' ')
3041: cp++;
3042: while (*cp == ' ')
3043: *cp++ = '\0';
3044: if (*cp != '\0')
3045: mandoc_vmsg(MANDOCERR_ARG_EXCESS,
3046: r->parse, ln, cp - buf->buf,
3047: "%s ... %s", roff_name[tok], cp);
3048: roff_word_alloc(r->man, ln, pos, buf->buf + pos);
1.300 schwarze 3049: }
3050:
1.309 schwarze 3051: if (tok == ROFF_ce || tok == ROFF_rj) {
3052: if (r->man->last->type == ROFFT_ELEM) {
1.305 schwarze 3053: roff_word_alloc(r->man, ln, pos, "1");
3054: r->man->last->flags |= NODE_NOSRC;
3055: }
3056: npos = 0;
3057: if (roff_evalnum(r, ln, r->man->last->string, &npos,
3058: &roffce_lines, 0) == 0) {
3059: mandoc_vmsg(MANDOCERR_CE_NONUM,
3060: r->parse, ln, pos, "ce %s", buf->buf + pos);
3061: roffce_lines = 1;
3062: }
3063: if (roffce_lines < 1) {
3064: r->man->last = r->man->last->parent;
3065: roffce_node = NULL;
3066: roffce_lines = 0;
3067: } else
3068: roffce_node = r->man->last->parent;
3069: } else {
3070: n->flags |= NODE_VALID | NODE_ENDED;
3071: r->man->last = n;
3072: }
3073: n->flags |= NODE_LINE;
1.300 schwarze 3074: r->man->next = ROFF_NEXT_SIBLING;
3075: return ROFF_IGN;
3076: }
3077:
3078: static enum rofferr
3079: roff_manyarg(ROFF_ARGS)
3080: {
3081: struct roff_node *n;
3082: char *sp, *ep;
3083:
3084: roff_elem_alloc(r->man, ln, ppos, tok);
3085: n = r->man->last;
3086:
3087: for (sp = ep = buf->buf + pos; *sp != '\0'; sp = ep) {
3088: while (*ep != '\0' && *ep != ' ')
3089: ep++;
3090: while (*ep == ' ')
3091: *ep++ = '\0';
3092: roff_word_alloc(r->man, ln, sp - buf->buf, sp);
1.297 schwarze 3093: }
3094:
3095: n->flags |= NODE_LINE | NODE_VALID | NODE_ENDED;
3096: r->man->last = n;
3097: r->man->next = ROFF_NEXT_SIBLING;
1.277 schwarze 3098: return ROFF_IGN;
1.251 schwarze 3099: }
3100:
3101: static enum rofferr
1.311 schwarze 3102: roff_als(ROFF_ARGS)
3103: {
3104: char *oldn, *newn, *end, *value;
3105: size_t oldsz, newsz, valsz;
3106:
3107: newn = oldn = buf->buf + pos;
3108: if (*newn == '\0')
3109: return ROFF_IGN;
3110:
3111: newsz = roff_getname(r, &oldn, ln, pos);
3112: if (newn[newsz] == '\\' || *oldn == '\0')
3113: return ROFF_IGN;
3114:
3115: end = oldn;
3116: oldsz = roff_getname(r, &end, ln, oldn - buf->buf);
3117: if (oldsz == 0)
3118: return ROFF_IGN;
3119:
1.315 schwarze 3120: valsz = mandoc_asprintf(&value, ".%.*s \\$*\\\"\n",
3121: (int)oldsz, oldn);
1.311 schwarze 3122: roff_setstrn(&r->strtab, newn, newsz, value, valsz, 0);
3123: roff_setstrn(&r->rentab, newn, newsz, NULL, 0, 0);
3124: free(value);
3125: return ROFF_IGN;
3126: }
3127:
3128: static enum rofferr
1.296 schwarze 3129: roff_br(ROFF_ARGS)
1.251 schwarze 3130: {
1.302 schwarze 3131: if (r->man->flags & (MAN_BLINE | MAN_ELINE))
3132: man_breakscope(r->man, ROFF_br);
1.296 schwarze 3133: roff_elem_alloc(r->man, ln, ppos, ROFF_br);
3134: if (buf->buf[pos] != '\0')
3135: mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
3136: "%s %s", roff_name[tok], buf->buf + pos);
3137: r->man->last->flags |= NODE_LINE | NODE_VALID | NODE_ENDED;
3138: r->man->next = ROFF_NEXT_SIBLING;
3139: return ROFF_IGN;
1.92 schwarze 3140: }
3141:
1.105 kristaps 3142: static enum rofferr
1.174 kristaps 3143: roff_cc(ROFF_ARGS)
3144: {
3145: const char *p;
3146:
1.238 schwarze 3147: p = buf->buf + pos;
1.174 kristaps 3148:
1.238 schwarze 3149: if (*p == '\0' || (r->control = *p++) == '.')
1.303 schwarze 3150: r->control = '\0';
1.174 kristaps 3151:
1.238 schwarze 3152: if (*p != '\0')
1.260 schwarze 3153: mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse,
3154: ln, p - buf->buf, "cc ... %s", p);
1.174 kristaps 3155:
1.277 schwarze 3156: return ROFF_IGN;
1.174 kristaps 3157: }
3158:
3159: static enum rofferr
1.303 schwarze 3160: roff_ec(ROFF_ARGS)
3161: {
3162: const char *p;
3163:
3164: p = buf->buf + pos;
3165: if (*p == '\0')
3166: r->escape = '\\';
3167: else {
3168: r->escape = *p;
3169: if (*++p != '\0')
3170: mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse,
3171: ln, p - buf->buf, "ec ... %s", p);
3172: }
3173: return ROFF_IGN;
3174: }
3175:
3176: static enum rofferr
3177: roff_eo(ROFF_ARGS)
3178: {
3179: r->escape = '\0';
3180: if (buf->buf[pos] != '\0')
3181: mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse,
3182: ln, pos, "eo %s", buf->buf + pos);
3183: return ROFF_IGN;
1.330 schwarze 3184: }
3185:
3186: static enum rofferr
3187: roff_nop(ROFF_ARGS)
3188: {
3189: while (buf->buf[pos] == ' ')
3190: pos++;
3191: *offs = pos;
3192: return ROFF_RERUN;
1.303 schwarze 3193: }
3194:
3195: static enum rofferr
1.164 kristaps 3196: roff_tr(ROFF_ARGS)
3197: {
3198: const char *p, *first, *second;
3199: size_t fsz, ssz;
3200: enum mandoc_esc esc;
3201:
1.238 schwarze 3202: p = buf->buf + pos;
1.164 kristaps 3203:
1.238 schwarze 3204: if (*p == '\0') {
1.260 schwarze 3205: mandoc_msg(MANDOCERR_REQ_EMPTY, r->parse, ln, ppos, "tr");
1.277 schwarze 3206: return ROFF_IGN;
1.164 kristaps 3207: }
3208:
1.238 schwarze 3209: while (*p != '\0') {
1.164 kristaps 3210: fsz = ssz = 1;
3211:
3212: first = p++;
1.238 schwarze 3213: if (*first == '\\') {
1.164 kristaps 3214: esc = mandoc_escape(&p, NULL, NULL);
1.238 schwarze 3215: if (esc == ESCAPE_ERROR) {
1.219 schwarze 3216: mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.238 schwarze 3217: ln, (int)(p - buf->buf), first);
1.277 schwarze 3218: return ROFF_IGN;
1.164 kristaps 3219: }
3220: fsz = (size_t)(p - first);
3221: }
3222:
3223: second = p++;
1.238 schwarze 3224: if (*second == '\\') {
1.164 kristaps 3225: esc = mandoc_escape(&p, NULL, NULL);
1.238 schwarze 3226: if (esc == ESCAPE_ERROR) {
1.219 schwarze 3227: mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.238 schwarze 3228: ln, (int)(p - buf->buf), second);
1.277 schwarze 3229: return ROFF_IGN;
1.164 kristaps 3230: }
3231: ssz = (size_t)(p - second);
1.238 schwarze 3232: } else if (*second == '\0') {
1.260 schwarze 3233: mandoc_vmsg(MANDOCERR_TR_ODD, r->parse,
3234: ln, first - buf->buf, "tr %s", first);
1.164 kristaps 3235: second = " ";
1.165 kristaps 3236: p--;
1.164 kristaps 3237: }
3238:
1.167 kristaps 3239: if (fsz > 1) {
1.207 schwarze 3240: roff_setstrn(&r->xmbtab, first, fsz,
3241: second, ssz, 0);
1.167 kristaps 3242: continue;
3243: }
3244:
1.238 schwarze 3245: if (r->xtab == NULL)
1.207 schwarze 3246: r->xtab = mandoc_calloc(128,
3247: sizeof(struct roffstr));
1.167 kristaps 3248:
3249: free(r->xtab[(int)*first].p);
3250: r->xtab[(int)*first].p = mandoc_strndup(second, ssz);
3251: r->xtab[(int)*first].sz = ssz;
1.164 kristaps 3252: }
3253:
1.277 schwarze 3254: return ROFF_IGN;
1.164 kristaps 3255: }
3256:
3257: static enum rofferr
1.306 schwarze 3258: roff_rn(ROFF_ARGS)
3259: {
3260: const char *value;
3261: char *oldn, *newn, *end;
3262: size_t oldsz, newsz;
1.315 schwarze 3263: int deftype;
1.306 schwarze 3264:
3265: oldn = newn = buf->buf + pos;
3266: if (*oldn == '\0')
3267: return ROFF_IGN;
3268:
3269: oldsz = roff_getname(r, &newn, ln, pos);
3270: if (oldn[oldsz] == '\\' || *newn == '\0')
3271: return ROFF_IGN;
3272:
3273: end = newn;
3274: newsz = roff_getname(r, &end, ln, newn - buf->buf);
3275: if (newsz == 0)
3276: return ROFF_IGN;
3277:
1.315 schwarze 3278: deftype = ROFFDEF_ANY;
3279: value = roff_getstrn(r, oldn, oldsz, &deftype);
3280: switch (deftype) {
3281: case ROFFDEF_USER:
1.306 schwarze 3282: roff_setstrn(&r->strtab, newn, newsz, value, strlen(value), 0);
3283: roff_setstrn(&r->strtab, oldn, oldsz, NULL, 0, 0);
3284: roff_setstrn(&r->rentab, newn, newsz, NULL, 0, 0);
1.315 schwarze 3285: break;
3286: case ROFFDEF_PRE:
3287: roff_setstrn(&r->strtab, newn, newsz, value, strlen(value), 0);
3288: roff_setstrn(&r->rentab, newn, newsz, NULL, 0, 0);
3289: break;
3290: case ROFFDEF_REN:
1.306 schwarze 3291: roff_setstrn(&r->rentab, newn, newsz, value, strlen(value), 0);
3292: roff_setstrn(&r->rentab, oldn, oldsz, NULL, 0, 0);
1.315 schwarze 3293: roff_setstrn(&r->strtab, newn, newsz, NULL, 0, 0);
3294: break;
3295: case ROFFDEF_STD:
1.306 schwarze 3296: roff_setstrn(&r->rentab, newn, newsz, oldn, oldsz, 0);
1.315 schwarze 3297: roff_setstrn(&r->strtab, newn, newsz, NULL, 0, 0);
3298: break;
3299: default:
3300: roff_setstrn(&r->strtab, newn, newsz, NULL, 0, 0);
3301: roff_setstrn(&r->rentab, newn, newsz, NULL, 0, 0);
3302: break;
3303: }
1.306 schwarze 3304: return ROFF_IGN;
3305: }
3306:
3307: static enum rofferr
1.105 kristaps 3308: roff_so(ROFF_ARGS)
3309: {
1.249 schwarze 3310: char *name, *cp;
1.105 kristaps 3311:
1.238 schwarze 3312: name = buf->buf + pos;
1.224 schwarze 3313: mandoc_vmsg(MANDOCERR_SO, r->parse, ln, ppos, "so %s", name);
1.105 kristaps 3314:
3315: /*
3316: * Handle `so'. Be EXTREMELY careful, as we shouldn't be
3317: * opening anything that's not in our cwd or anything beneath
3318: * it. Thus, explicitly disallow traversing up the file-system
3319: * or using absolute paths.
3320: */
3321:
1.238 schwarze 3322: if (*name == '/' || strstr(name, "../") || strstr(name, "/..")) {
1.210 schwarze 3323: mandoc_vmsg(MANDOCERR_SO_PATH, r->parse, ln, ppos,
3324: ".so %s", name);
1.249 schwarze 3325: buf->sz = mandoc_asprintf(&cp,
3326: ".sp\nSee the file %s.\n.sp", name) + 1;
3327: free(buf->buf);
3328: buf->buf = cp;
3329: *offs = 0;
1.277 schwarze 3330: return ROFF_REPARSE;
1.105 kristaps 3331: }
3332:
3333: *offs = pos;
1.277 schwarze 3334: return ROFF_SO;
1.105 kristaps 3335: }
1.92 schwarze 3336:
1.266 schwarze 3337: /* --- user defined strings and macros ------------------------------------ */
3338:
1.106 kristaps 3339: static enum rofferr
3340: roff_userdef(ROFF_ARGS)
1.99 kristaps 3341: {
1.311 schwarze 3342: const char *arg[16], *ap;
1.106 kristaps 3343: char *cp, *n1, *n2;
1.292 schwarze 3344: int expand_count, i, ib, ie;
1.263 schwarze 3345: size_t asz, rsz;
1.106 kristaps 3346:
3347: /*
3348: * Collect pointers to macro argument strings
1.188 schwarze 3349: * and NUL-terminate them.
1.106 kristaps 3350: */
1.263 schwarze 3351:
1.273 schwarze 3352: r->argc = 0;
1.238 schwarze 3353: cp = buf->buf + pos;
1.311 schwarze 3354: for (i = 0; i < 16; i++) {
1.273 schwarze 3355: if (*cp == '\0')
3356: arg[i] = "";
3357: else {
3358: arg[i] = mandoc_getarg(r->parse, &cp, ln, &pos);
3359: r->argc = i + 1;
3360: }
3361: }
1.99 kristaps 3362:
1.106 kristaps 3363: /*
3364: * Expand macro arguments.
1.99 kristaps 3365: */
1.263 schwarze 3366:
3367: buf->sz = strlen(r->current_string) + 1;
1.292 schwarze 3368: n1 = n2 = cp = mandoc_malloc(buf->sz);
1.263 schwarze 3369: memcpy(n1, r->current_string, buf->sz);
1.292 schwarze 3370: expand_count = 0;
1.263 schwarze 3371: while (*cp != '\0') {
3372:
3373: /* Scan ahead for the next argument invocation. */
3374:
3375: if (*cp++ != '\\')
3376: continue;
3377: if (*cp++ != '$')
3378: continue;
1.274 schwarze 3379: if (*cp == '*') { /* \\$* inserts all arguments */
3380: ib = 0;
3381: ie = r->argc - 1;
3382: } else { /* \\$1 .. \\$9 insert one argument */
3383: ib = ie = *cp - '1';
3384: if (ib < 0 || ib > 8)
3385: continue;
3386: }
1.263 schwarze 3387: cp -= 2;
1.292 schwarze 3388:
3389: /*
3390: * Prevent infinite recursion.
3391: */
3392:
3393: if (cp >= n2)
3394: expand_count = 1;
3395: else if (++expand_count > EXPAND_LIMIT) {
3396: mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
3397: ln, (int)(cp - n1), NULL);
1.293 schwarze 3398: free(buf->buf);
3399: buf->buf = n1;
1.329 schwarze 3400: *offs = 0;
1.292 schwarze 3401: return ROFF_IGN;
3402: }
1.263 schwarze 3403:
3404: /*
3405: * Determine the size of the expanded argument,
3406: * taking escaping of quotes into account.
3407: */
3408:
1.274 schwarze 3409: asz = ie > ib ? ie - ib : 0; /* for blanks */
3410: for (i = ib; i <= ie; i++) {
3411: for (ap = arg[i]; *ap != '\0'; ap++) {
3412: asz++;
3413: if (*ap == '"')
3414: asz += 3;
3415: }
1.263 schwarze 3416: }
3417: if (asz != 3) {
3418:
3419: /*
3420: * Determine the size of the rest of the
3421: * unexpanded macro, including the NUL.
3422: */
3423:
3424: rsz = buf->sz - (cp - n1) - 3;
3425:
3426: /*
3427: * When shrinking, move before
3428: * releasing the storage.
3429: */
3430:
3431: if (asz < 3)
3432: memmove(cp + asz, cp + 3, rsz);
3433:
3434: /*
3435: * Resize the storage for the macro
3436: * and readjust the parse pointer.
3437: */
3438:
3439: buf->sz += asz - 3;
3440: n2 = mandoc_realloc(n1, buf->sz);
3441: cp = n2 + (cp - n1);
3442: n1 = n2;
3443:
3444: /*
3445: * When growing, make room
3446: * for the expanded argument.
3447: */
3448:
3449: if (asz > 3)
3450: memmove(cp + asz, cp + 3, rsz);
3451: }
3452:
3453: /* Copy the expanded argument, escaping quotes. */
3454:
3455: n2 = cp;
1.274 schwarze 3456: for (i = ib; i <= ie; i++) {
3457: for (ap = arg[i]; *ap != '\0'; ap++) {
3458: if (*ap == '"') {
3459: memcpy(n2, "\\(dq", 4);
3460: n2 += 4;
3461: } else
3462: *n2++ = *ap;
3463: }
3464: if (i < ie)
3465: *n2++ = ' ';
1.106 kristaps 3466: }
1.99 kristaps 3467: }
3468:
1.106 kristaps 3469: /*
3470: * Replace the macro invocation
3471: * by the expanded macro.
3472: */
1.263 schwarze 3473:
1.238 schwarze 3474: free(buf->buf);
3475: buf->buf = n1;
1.248 schwarze 3476: *offs = 0;
1.106 kristaps 3477:
1.277 schwarze 3478: return buf->sz > 1 && buf->buf[buf->sz - 2] == '\n' ?
3479: ROFF_REPARSE : ROFF_APPEND;
1.99 kristaps 3480: }
1.121 schwarze 3481:
1.306 schwarze 3482: /*
3483: * Calling a high-level macro that was renamed with .rn.
3484: * r->current_string has already been set up by roff_parse().
3485: */
3486: static enum rofferr
3487: roff_renamed(ROFF_ARGS)
3488: {
3489: char *nbuf;
3490:
1.315 schwarze 3491: buf->sz = mandoc_asprintf(&nbuf, ".%s%s%s", r->current_string,
3492: buf->buf[pos] == '\0' ? "" : " ", buf->buf + pos) + 1;
1.306 schwarze 3493: free(buf->buf);
3494: buf->buf = nbuf;
1.329 schwarze 3495: *offs = 0;
1.306 schwarze 3496: return ROFF_CONT;
3497: }
3498:
1.212 schwarze 3499: static size_t
1.121 schwarze 3500: roff_getname(struct roff *r, char **cpp, int ln, int pos)
3501: {
3502: char *name, *cp;
1.212 schwarze 3503: size_t namesz;
1.121 schwarze 3504:
3505: name = *cpp;
3506: if ('\0' == *name)
1.277 schwarze 3507: return 0;
1.121 schwarze 3508:
1.212 schwarze 3509: /* Read until end of name and terminate it with NUL. */
3510: for (cp = name; 1; cp++) {
3511: if ('\0' == *cp || ' ' == *cp) {
3512: namesz = cp - name;
3513: break;
3514: }
1.121 schwarze 3515: if ('\\' != *cp)
3516: continue;
1.215 schwarze 3517: namesz = cp - name;
3518: if ('{' == cp[1] || '}' == cp[1])
3519: break;
1.121 schwarze 3520: cp++;
3521: if ('\\' == *cp)
3522: continue;
1.224 schwarze 3523: mandoc_vmsg(MANDOCERR_NAMESC, r->parse, ln, pos,
3524: "%.*s", (int)(cp - name + 1), name);
1.212 schwarze 3525: mandoc_escape((const char **)&cp, NULL, NULL);
3526: break;
1.121 schwarze 3527: }
3528:
3529: /* Read past spaces. */
3530: while (' ' == *cp)
3531: cp++;
3532:
3533: *cpp = cp;
1.277 schwarze 3534: return namesz;
1.121 schwarze 3535: }
3536:
1.106 kristaps 3537: /*
3538: * Store *string into the user-defined string called *name.
3539: * To clear an existing entry, call with (*r, *name, NULL, 0).
1.193 schwarze 3540: * append == 0: replace mode
3541: * append == 1: single-line append mode
3542: * append == 2: multiline append mode, append '\n' after each call
1.106 kristaps 3543: */
1.94 kristaps 3544: static void
1.106 kristaps 3545: roff_setstr(struct roff *r, const char *name, const char *string,
1.193 schwarze 3546: int append)
1.92 schwarze 3547: {
1.315 schwarze 3548: size_t namesz;
1.164 kristaps 3549:
1.315 schwarze 3550: namesz = strlen(name);
3551: roff_setstrn(&r->strtab, name, namesz, string,
1.207 schwarze 3552: string ? strlen(string) : 0, append);
1.315 schwarze 3553: roff_setstrn(&r->rentab, name, namesz, NULL, 0, 0);
1.164 kristaps 3554: }
3555:
3556: static void
1.166 kristaps 3557: roff_setstrn(struct roffkv **r, const char *name, size_t namesz,
1.193 schwarze 3558: const char *string, size_t stringsz, int append)
1.164 kristaps 3559: {
1.166 kristaps 3560: struct roffkv *n;
1.164 kristaps 3561: char *c;
3562: int i;
3563: size_t oldch, newch;
1.92 schwarze 3564:
1.106 kristaps 3565: /* Search for an existing string with the same name. */
1.164 kristaps 3566: n = *r;
3567:
1.211 schwarze 3568: while (n && (namesz != n->key.sz ||
3569: strncmp(n->key.p, name, namesz)))
1.92 schwarze 3570: n = n->next;
1.94 kristaps 3571:
3572: if (NULL == n) {
1.106 kristaps 3573: /* Create a new string table entry. */
1.166 kristaps 3574: n = mandoc_malloc(sizeof(struct roffkv));
3575: n->key.p = mandoc_strndup(name, namesz);
3576: n->key.sz = namesz;
3577: n->val.p = NULL;
3578: n->val.sz = 0;
1.164 kristaps 3579: n->next = *r;
3580: *r = n;
1.193 schwarze 3581: } else if (0 == append) {
1.166 kristaps 3582: free(n->val.p);
3583: n->val.p = NULL;
3584: n->val.sz = 0;
1.106 kristaps 3585: }
3586:
3587: if (NULL == string)
3588: return;
3589:
3590: /*
3591: * One additional byte for the '\n' in multiline mode,
3592: * and one for the terminating '\0'.
3593: */
1.193 schwarze 3594: newch = stringsz + (1 < append ? 2u : 1u);
1.164 kristaps 3595:
1.166 kristaps 3596: if (NULL == n->val.p) {
3597: n->val.p = mandoc_malloc(newch);
3598: *n->val.p = '\0';
1.106 kristaps 3599: oldch = 0;
3600: } else {
1.166 kristaps 3601: oldch = n->val.sz;
3602: n->val.p = mandoc_realloc(n->val.p, oldch + newch);
1.106 kristaps 3603: }
3604:
3605: /* Skip existing content in the destination buffer. */
1.166 kristaps 3606: c = n->val.p + (int)oldch;
1.106 kristaps 3607:
3608: /* Append new content to the destination buffer. */
1.164 kristaps 3609: i = 0;
3610: while (i < (int)stringsz) {
1.106 kristaps 3611: /*
3612: * Rudimentary roff copy mode:
3613: * Handle escaped backslashes.
3614: */
1.164 kristaps 3615: if ('\\' == string[i] && '\\' == string[i + 1])
3616: i++;
3617: *c++ = string[i++];
1.106 kristaps 3618: }
1.94 kristaps 3619:
1.106 kristaps 3620: /* Append terminating bytes. */
1.193 schwarze 3621: if (1 < append)
1.106 kristaps 3622: *c++ = '\n';
1.163 kristaps 3623:
1.106 kristaps 3624: *c = '\0';
1.166 kristaps 3625: n->val.sz = (int)(c - n->val.p);
1.92 schwarze 3626: }
3627:
1.94 kristaps 3628: static const char *
1.325 schwarze 3629: roff_getstrn(struct roff *r, const char *name, size_t len,
1.315 schwarze 3630: int *deftype)
1.92 schwarze 3631: {
1.315 schwarze 3632: const struct roffkv *n;
1.325 schwarze 3633: int found, i;
1.315 schwarze 3634: enum roff_tok tok;
3635:
1.325 schwarze 3636: found = 0;
3637: for (n = r->strtab; n != NULL; n = n->next) {
3638: if (strncmp(name, n->key.p, len) != 0 ||
3639: n->key.p[len] != '\0' || n->val.p == NULL)
3640: continue;
3641: if (*deftype & ROFFDEF_USER) {
3642: *deftype = ROFFDEF_USER;
3643: return n->val.p;
3644: } else {
3645: found = 1;
3646: break;
3647: }
3648: }
3649: for (n = r->rentab; n != NULL; n = n->next) {
3650: if (strncmp(name, n->key.p, len) != 0 ||
3651: n->key.p[len] != '\0' || n->val.p == NULL)
3652: continue;
3653: if (*deftype & ROFFDEF_REN) {
3654: *deftype = ROFFDEF_REN;
3655: return n->val.p;
3656: } else {
3657: found = 1;
3658: break;
1.315 schwarze 3659: }
3660: }
1.325 schwarze 3661: for (i = 0; i < PREDEFS_MAX; i++) {
3662: if (strncmp(name, predefs[i].name, len) != 0 ||
3663: predefs[i].name[len] != '\0')
3664: continue;
3665: if (*deftype & ROFFDEF_PRE) {
3666: *deftype = ROFFDEF_PRE;
3667: return predefs[i].str;
3668: } else {
3669: found = 1;
3670: break;
1.315 schwarze 3671: }
3672: }
1.325 schwarze 3673: if (r->man->macroset != MACROSET_MAN) {
3674: for (tok = MDOC_Dd; tok < MDOC_MAX; tok++) {
3675: if (strncmp(name, roff_name[tok], len) != 0 ||
3676: roff_name[tok][len] != '\0')
3677: continue;
3678: if (*deftype & ROFFDEF_STD) {
3679: *deftype = ROFFDEF_STD;
3680: return NULL;
3681: } else {
3682: found = 1;
3683: break;
1.315 schwarze 3684: }
3685: }
3686: }
1.325 schwarze 3687: if (r->man->macroset != MACROSET_MDOC) {
3688: for (tok = MAN_TH; tok < MAN_MAX; tok++) {
3689: if (strncmp(name, roff_name[tok], len) != 0 ||
3690: roff_name[tok][len] != '\0')
3691: continue;
3692: if (*deftype & ROFFDEF_STD) {
3693: *deftype = ROFFDEF_STD;
3694: return NULL;
3695: } else {
3696: found = 1;
3697: break;
1.315 schwarze 3698: }
3699: }
1.325 schwarze 3700: }
3701:
3702: if (found == 0 && *deftype != ROFFDEF_ANY) {
3703: if (*deftype & ROFFDEF_REN) {
3704: /*
3705: * This might still be a request,
3706: * so do not treat it as undefined yet.
3707: */
3708: *deftype = ROFFDEF_UNDEF;
3709: return NULL;
1.315 schwarze 3710: }
1.325 schwarze 3711:
3712: /* Using an undefined string defines it to be empty. */
3713:
3714: roff_setstrn(&r->strtab, name, len, "", 0, 0);
3715: roff_setstrn(&r->rentab, name, len, NULL, 0, 0);
1.315 schwarze 3716: }
1.325 schwarze 3717:
1.315 schwarze 3718: *deftype = 0;
1.277 schwarze 3719: return NULL;
1.92 schwarze 3720: }
3721:
1.94 kristaps 3722: static void
1.167 kristaps 3723: roff_freestr(struct roffkv *r)
1.92 schwarze 3724: {
1.166 kristaps 3725: struct roffkv *n, *nn;
1.92 schwarze 3726:
1.167 kristaps 3727: for (n = r; n; n = nn) {
1.166 kristaps 3728: free(n->key.p);
3729: free(n->val.p);
1.92 schwarze 3730: nn = n->next;
3731: free(n);
3732: }
1.114 kristaps 3733: }
1.266 schwarze 3734:
3735: /* --- accessors and utility functions ------------------------------------ */
1.164 kristaps 3736:
3737: /*
3738: * Duplicate an input string, making the appropriate character
3739: * conversations (as stipulated by `tr') along the way.
3740: * Returns a heap-allocated string with all the replacements made.
3741: */
3742: char *
3743: roff_strdup(const struct roff *r, const char *p)
3744: {
1.166 kristaps 3745: const struct roffkv *cp;
1.164 kristaps 3746: char *res;
3747: const char *pp;
3748: size_t ssz, sz;
3749: enum mandoc_esc esc;
3750:
1.167 kristaps 3751: if (NULL == r->xmbtab && NULL == r->xtab)
1.277 schwarze 3752: return mandoc_strdup(p);
1.164 kristaps 3753: else if ('\0' == *p)
1.277 schwarze 3754: return mandoc_strdup("");
1.164 kristaps 3755:
3756: /*
3757: * Step through each character looking for term matches
3758: * (remember that a `tr' can be invoked with an escape, which is
3759: * a glyph but the escape is multi-character).
3760: * We only do this if the character hash has been initialised
3761: * and the string is >0 length.
3762: */
3763:
3764: res = NULL;
3765: ssz = 0;
3766:
3767: while ('\0' != *p) {
1.289 schwarze 3768: assert((unsigned int)*p < 128);
3769: if ('\\' != *p && r->xtab && r->xtab[(unsigned int)*p].p) {
1.167 kristaps 3770: sz = r->xtab[(int)*p].sz;
3771: res = mandoc_realloc(res, ssz + sz + 1);
3772: memcpy(res + ssz, r->xtab[(int)*p].p, sz);
3773: ssz += sz;
3774: p++;
3775: continue;
3776: } else if ('\\' != *p) {
3777: res = mandoc_realloc(res, ssz + 2);
3778: res[ssz++] = *p++;
3779: continue;
3780: }
3781:
1.164 kristaps 3782: /* Search for term matches. */
1.167 kristaps 3783: for (cp = r->xmbtab; cp; cp = cp->next)
1.166 kristaps 3784: if (0 == strncmp(p, cp->key.p, cp->key.sz))
1.164 kristaps 3785: break;
3786:
3787: if (NULL != cp) {
3788: /*
3789: * A match has been found.
3790: * Append the match to the array and move
3791: * forward by its keysize.
3792: */
1.207 schwarze 3793: res = mandoc_realloc(res,
3794: ssz + cp->val.sz + 1);
1.166 kristaps 3795: memcpy(res + ssz, cp->val.p, cp->val.sz);
3796: ssz += cp->val.sz;
3797: p += (int)cp->key.sz;
1.164 kristaps 3798: continue;
3799: }
3800:
1.167 kristaps 3801: /*
3802: * Handle escapes carefully: we need to copy
3803: * over just the escape itself, or else we might
3804: * do replacements within the escape itself.
3805: * Make sure to pass along the bogus string.
3806: */
3807: pp = p++;
3808: esc = mandoc_escape(&p, NULL, NULL);
3809: if (ESCAPE_ERROR == esc) {
3810: sz = strlen(pp);
1.164 kristaps 3811: res = mandoc_realloc(res, ssz + sz + 1);
3812: memcpy(res + ssz, pp, sz);
1.167 kristaps 3813: break;
1.164 kristaps 3814: }
1.207 schwarze 3815: /*
3816: * We bail out on bad escapes.
1.167 kristaps 3817: * No need to warn: we already did so when
3818: * roff_res() was called.
3819: */
3820: sz = (int)(p - pp);
3821: res = mandoc_realloc(res, ssz + sz + 1);
3822: memcpy(res + ssz, pp, sz);
3823: ssz += sz;
1.164 kristaps 3824: }
3825:
3826: res[(int)ssz] = '\0';
1.277 schwarze 3827: return res;
1.227 schwarze 3828: }
3829:
3830: int
3831: roff_getformat(const struct roff *r)
3832: {
3833:
1.277 schwarze 3834: return r->format;
1.174 kristaps 3835: }
3836:
3837: /*
1.207 schwarze 3838: * Find out whether a line is a macro line or not.
1.174 kristaps 3839: * If it is, adjust the current position and return one; if it isn't,
3840: * return zero and don't change the current position.
3841: * If the control character has been set with `.cc', then let that grain
3842: * precedence.
3843: * This is slighly contrary to groff, where using the non-breaking
3844: * control character when `cc' has been invoked will cause the
3845: * non-breaking macro contents to be printed verbatim.
3846: */
3847: int
3848: roff_getcontrol(const struct roff *r, const char *cp, int *ppos)
3849: {
3850: int pos;
3851:
3852: pos = *ppos;
3853:
1.303 schwarze 3854: if (r->control != '\0' && cp[pos] == r->control)
1.174 kristaps 3855: pos++;
1.303 schwarze 3856: else if (r->control != '\0')
1.277 schwarze 3857: return 0;
1.174 kristaps 3858: else if ('\\' == cp[pos] && '.' == cp[pos + 1])
3859: pos += 2;
3860: else if ('.' == cp[pos] || '\'' == cp[pos])
3861: pos++;
3862: else
1.277 schwarze 3863: return 0;
1.174 kristaps 3864:
3865: while (' ' == cp[pos] || '\t' == cp[pos])
3866: pos++;
3867:
3868: *ppos = pos;
1.277 schwarze 3869: return 1;
1.74 kristaps 3870: }
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