=================================================================== RCS file: /cvs/mandoc/roff.c,v retrieving revision 1.166 retrieving revision 1.218 diff -u -p -r1.166 -r1.218 --- mandoc/roff.c 2011/07/29 09:19:48 1.166 +++ mandoc/roff.c 2014/07/06 18:46:55 1.218 @@ -1,7 +1,7 @@ -/* $Id: roff.c,v 1.166 2011/07/29 09:19:48 kristaps Exp $ */ +/* $Id: roff.c,v 1.218 2014/07/06 18:46:55 schwarze Exp $ */ /* - * Copyright (c) 2010, 2011 Kristaps Dzonsons - * Copyright (c) 2010, 2011 Ingo Schwarze + * Copyright (c) 2010, 2011, 2012 Kristaps Dzonsons + * Copyright (c) 2010-2014 Ingo Schwarze * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above @@ -21,26 +21,36 @@ #include #include +#include #include #include #include "mandoc.h" +#include "mandoc_aux.h" #include "libroff.h" #include "libmandoc.h" /* Maximum number of nested if-else conditionals. */ #define RSTACK_MAX 128 +/* Maximum number of string expansions per line, to break infinite loops. */ +#define EXPAND_LIMIT 1000 + enum rofft { ROFF_ad, ROFF_am, ROFF_ami, ROFF_am1, + ROFF_as, + ROFF_cc, + ROFF_ce, ROFF_de, ROFF_dei, ROFF_de1, ROFF_ds, ROFF_el, + ROFF_fam, + ROFF_hw, ROFF_hy, ROFF_ie, ROFF_if, @@ -52,42 +62,32 @@ enum rofft { ROFF_ns, ROFF_ps, ROFF_rm, + ROFF_rr, ROFF_so, ROFF_ta, ROFF_tr, + ROFF_Dd, + ROFF_TH, ROFF_TS, ROFF_TE, ROFF_T_, ROFF_EQ, ROFF_EN, ROFF_cblock, - ROFF_ccond, ROFF_USERDEF, ROFF_MAX }; -enum roffrule { - ROFFRULE_ALLOW, - ROFFRULE_DENY -}; - /* - * A single register entity. If "set" is zero, the value of the - * register should be the default one, which is per-register. - * Registers are assumed to be unsigned ints for now. + * An incredibly-simple string buffer. */ -struct reg { - int set; /* whether set or not */ - unsigned int u; /* unsigned integer */ -}; - struct roffstr { - char *p; - size_t sz; + char *p; /* nil-terminated buffer */ + size_t sz; /* saved strlen(p) */ }; /* - * A key-value string pair with lengths. + * A key-value roffstr pair as part of a singly-linked list. */ struct roffkv { struct roffstr key; @@ -95,14 +95,26 @@ struct roffkv { struct roffkv *next; /* next in list */ }; +/* + * A single number register as part of a singly-linked list. + */ +struct roffreg { + struct roffstr key; + int val; + struct roffreg *next; +}; + struct roff { struct mparse *parse; /* parse point */ + int options; /* parse options */ struct roffnode *last; /* leaf of stack */ - enum roffrule rstack[RSTACK_MAX]; /* stack of !`ie' rules */ + int rstack[RSTACK_MAX]; /* stack of !`ie' rules */ + char control; /* control character */ int rstackpos; /* position in rstack */ - struct reg regs[REG__MAX]; + struct roffreg *regtab; /* number registers */ struct roffkv *strtab; /* user-defined strings & macros */ - struct roffkv *chrtab; /* user-defined characters */ + struct roffkv *xmbtab; /* multi-byte trans table (`tr') */ + struct roffstr *xtab; /* single-byte trans table (`tr') */ const char *current_string; /* value of last called user macro */ struct tbl_node *first_tbl; /* first table parsed */ struct tbl_node *last_tbl; /* last table parsed */ @@ -120,12 +132,12 @@ struct roffnode { char *name; /* node name, e.g. macro name */ char *end; /* end-rules: custom token */ int endspan; /* end-rules: next-line or infty */ - enum roffrule rule; /* current evaluation rule */ + int rule; /* current evaluation rule */ }; #define ROFF_ARGS struct roff *r, /* parse ctx */ \ enum rofft tok, /* tok of macro */ \ - char **bufp, /* input buffer */ \ + char **bufp, /* input buffer */ \ size_t *szp, /* size of input buffer */ \ int ln, /* parse line */ \ int ppos, /* original pos in buffer */ \ @@ -162,32 +174,47 @@ static enum rofferr roff_block(ROFF_ARGS); static enum rofferr roff_block_text(ROFF_ARGS); static enum rofferr roff_block_sub(ROFF_ARGS); static enum rofferr roff_cblock(ROFF_ARGS); -static enum rofferr roff_ccond(ROFF_ARGS); +static enum rofferr roff_cc(ROFF_ARGS); +static void roff_ccond(struct roff *, int, int); static enum rofferr roff_cond(ROFF_ARGS); static enum rofferr roff_cond_text(ROFF_ARGS); static enum rofferr roff_cond_sub(ROFF_ARGS); static enum rofferr roff_ds(ROFF_ARGS); -static enum roffrule roff_evalcond(const char *, int *); +static int roff_evalcond(const char *, int *); +static int roff_evalnum(const char *, int *, int *, int); +static int roff_evalpar(const char *, int *, int *); +static int roff_evalstrcond(const char *, int *); static void roff_free1(struct roff *); -static void roff_freestr(struct roffkv **); -static char *roff_getname(struct roff *, char **, int, int); -static const char *roff_getstrn(const struct roff *, +static void roff_freereg(struct roffreg *); +static void roff_freestr(struct roffkv *); +static size_t roff_getname(struct roff *, char **, int, int); +static int roff_getnum(const char *, int *, int *); +static int roff_getop(const char *, int *, char *); +static int roff_getregn(const struct roff *, const char *, size_t); +static int roff_getregro(const char *name); +static const char *roff_getstrn(const struct roff *, + const char *, size_t); +static enum rofferr roff_it(ROFF_ARGS); static enum rofferr roff_line_ignore(ROFF_ARGS); static enum rofferr roff_nr(ROFF_ARGS); -static void roff_openeqn(struct roff *, const char *, +static void roff_openeqn(struct roff *, const char *, int, int, const char *); -static enum rofft roff_parse(struct roff *, const char *, int *); -static enum rofferr roff_parsetext(char *); -static void roff_res(struct roff *, +static enum rofft roff_parse(struct roff *, char *, int *, + int, int); +static enum rofferr roff_parsetext(char **, size_t *, int, int *); +static enum rofferr roff_res(struct roff *, char **, size_t *, int, int); static enum rofferr roff_rm(ROFF_ARGS); +static enum rofferr roff_rr(ROFF_ARGS); static void roff_setstr(struct roff *, const char *, const char *, int); -static void roff_setstrn(struct roffkv **, const char *, +static void roff_setstrn(struct roffkv **, const char *, size_t, const char *, size_t, int); static enum rofferr roff_so(ROFF_ARGS); static enum rofferr roff_tr(ROFF_ARGS); +static enum rofferr roff_Dd(ROFF_ARGS); +static enum rofferr roff_TH(ROFF_ARGS); static enum rofferr roff_TE(ROFF_ARGS); static enum rofferr roff_TS(ROFF_ARGS); static enum rofferr roff_EQ(ROFF_ARGS); @@ -208,35 +235,75 @@ static struct roffmac roffs[ROFF_MAX] = { { "am", roff_block, roff_block_text, roff_block_sub, 0, NULL }, { "ami", roff_block, roff_block_text, roff_block_sub, 0, NULL }, { "am1", roff_block, roff_block_text, roff_block_sub, 0, NULL }, + { "as", roff_ds, NULL, NULL, 0, NULL }, + { "cc", roff_cc, NULL, NULL, 0, NULL }, + { "ce", roff_line_ignore, NULL, NULL, 0, NULL }, { "de", roff_block, roff_block_text, roff_block_sub, 0, NULL }, { "dei", roff_block, roff_block_text, roff_block_sub, 0, NULL }, { "de1", roff_block, roff_block_text, roff_block_sub, 0, NULL }, { "ds", roff_ds, NULL, NULL, 0, NULL }, { "el", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL }, + { "fam", roff_line_ignore, NULL, NULL, 0, NULL }, + { "hw", roff_line_ignore, NULL, NULL, 0, NULL }, { "hy", roff_line_ignore, NULL, NULL, 0, NULL }, { "ie", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL }, { "if", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL }, { "ig", roff_block, roff_block_text, roff_block_sub, 0, NULL }, - { "it", roff_line_ignore, NULL, NULL, 0, NULL }, + { "it", roff_it, NULL, NULL, 0, NULL }, { "ne", roff_line_ignore, NULL, NULL, 0, NULL }, { "nh", roff_line_ignore, NULL, NULL, 0, NULL }, { "nr", roff_nr, NULL, NULL, 0, NULL }, { "ns", roff_line_ignore, NULL, NULL, 0, NULL }, { "ps", roff_line_ignore, NULL, NULL, 0, NULL }, { "rm", roff_rm, NULL, NULL, 0, NULL }, + { "rr", roff_rr, NULL, NULL, 0, NULL }, { "so", roff_so, NULL, NULL, 0, NULL }, { "ta", roff_line_ignore, NULL, NULL, 0, NULL }, { "tr", roff_tr, NULL, NULL, 0, NULL }, + { "Dd", roff_Dd, NULL, NULL, 0, NULL }, + { "TH", roff_TH, NULL, NULL, 0, NULL }, { "TS", roff_TS, NULL, NULL, 0, NULL }, { "TE", roff_TE, NULL, NULL, 0, NULL }, { "T&", roff_T_, NULL, NULL, 0, NULL }, { "EQ", roff_EQ, NULL, NULL, 0, NULL }, { "EN", roff_EN, NULL, NULL, 0, NULL }, { ".", roff_cblock, NULL, NULL, 0, NULL }, - { "\\}", roff_ccond, NULL, NULL, 0, NULL }, { NULL, roff_userdef, NULL, NULL, 0, NULL }, }; +/* not currently implemented: Ds em Eq LP Me PP pp Or Rd Sf SH */ +const char *const __mdoc_reserved[] = { + "Ac", "Ad", "An", "Ao", "Ap", "Aq", "Ar", "At", + "Bc", "Bd", "Bf", "Bk", "Bl", "Bo", "Bq", + "Brc", "Bro", "Brq", "Bsx", "Bt", "Bx", + "Cd", "Cm", "Db", "Dc", "Dd", "Dl", "Do", "Dq", + "Dt", "Dv", "Dx", "D1", + "Ec", "Ed", "Ef", "Ek", "El", "Em", + "En", "Eo", "Er", "Es", "Ev", "Ex", + "Fa", "Fc", "Fd", "Fl", "Fn", "Fo", "Fr", "Ft", "Fx", + "Hf", "Ic", "In", "It", "Lb", "Li", "Lk", "Lp", + "Ms", "Mt", "Nd", "Nm", "No", "Ns", "Nx", + "Oc", "Oo", "Op", "Os", "Ot", "Ox", + "Pa", "Pc", "Pf", "Po", "Pp", "Pq", + "Qc", "Ql", "Qo", "Qq", "Re", "Rs", "Rv", + "Sc", "Sh", "Sm", "So", "Sq", + "Ss", "St", "Sx", "Sy", + "Ta", "Tn", "Ud", "Ux", "Va", "Vt", "Xc", "Xo", "Xr", + "%A", "%B", "%C", "%D", "%I", "%J", "%N", "%O", + "%P", "%Q", "%R", "%T", "%U", "%V", + NULL +}; + +/* not currently implemented: BT DE DS ME MT PT SY TQ YS */ +const char *const __man_reserved[] = { + "AT", "B", "BI", "BR", "DT", + "EE", "EN", "EQ", "EX", "HP", "I", "IB", "IP", "IR", + "LP", "OP", "P", "PD", "PP", + "R", "RB", "RE", "RI", "RS", "SB", "SH", "SM", "SS", + "TE", "TH", "TP", "TS", "T&", "UC", "UE", "UR", + NULL +}; + /* Array of injected predefined strings. */ #define PREDEFS_MAX 38 static const struct predef predefs[PREDEFS_MAX] = { @@ -246,6 +313,10 @@ static const struct predef predefs[PREDEFS_MAX] = { /* See roffhash_find() */ #define ROFF_HASH(p) (p[0] - ASCII_LO) +static int roffit_lines; /* number of lines to delay */ +static char *roffit_macro; /* nil-terminated macro line */ + + static void roffhash_init(void) { @@ -298,7 +369,6 @@ roffhash_find(const char *p, size_t s) return(ROFF_MAX); } - /* * Pop the current node off of the stack of roff instructions currently * pending. @@ -309,7 +379,7 @@ roffnode_pop(struct roff *r) struct roffnode *p; assert(r->last); - p = r->last; + p = r->last; r->last = r->last->parent; free(p->name); @@ -317,7 +387,6 @@ roffnode_pop(struct roff *r) free(p); } - /* * Push a roff node onto the instruction stack. This must later be * removed with roffnode_pop(). @@ -335,21 +404,21 @@ roffnode_push(struct roff *r, enum rofft tok, const ch p->parent = r->last; p->line = line; p->col = col; - p->rule = p->parent ? p->parent->rule : ROFFRULE_DENY; + p->rule = p->parent ? p->parent->rule : 0; r->last = p; } - static void roff_free1(struct roff *r) { - struct tbl_node *t; + struct tbl_node *tbl; struct eqn_node *e; + int i; - while (NULL != (t = r->first_tbl)) { - r->first_tbl = t->next; - tbl_free(t); + while (NULL != (tbl = r->first_tbl)) { + r->first_tbl = tbl->next; + tbl_free(tbl); } r->first_tbl = r->last_tbl = r->tbl = NULL; @@ -364,25 +433,31 @@ roff_free1(struct roff *r) while (r->last) roffnode_pop(r); - roff_freestr(&r->strtab); - roff_freestr(&r->chrtab); -} + roff_freestr(r->strtab); + roff_freestr(r->xmbtab); + r->strtab = r->xmbtab = NULL; + roff_freereg(r->regtab); + + r->regtab = NULL; + + if (r->xtab) + for (i = 0; i < 128; i++) + free(r->xtab[i].p); + + free(r->xtab); + r->xtab = NULL; +} + void roff_reset(struct roff *r) { - int i; roff_free1(r); - - memset(&r->regs, 0, sizeof(struct reg) * REG__MAX); - - for (i = 0; i < PREDEFS_MAX; i++) - roff_setstr(r, predefs[i].name, predefs[i].str, 0); + r->control = 0; } - void roff_free(struct roff *r) { @@ -391,106 +466,137 @@ roff_free(struct roff *r) free(r); } - struct roff * -roff_alloc(struct mparse *parse) +roff_alloc(struct mparse *parse, int options) { struct roff *r; - int i; r = mandoc_calloc(1, sizeof(struct roff)); r->parse = parse; + r->options = options; r->rstackpos = -1; - + roffhash_init(); - for (i = 0; i < PREDEFS_MAX; i++) - roff_setstr(r, predefs[i].name, predefs[i].str, 0); - return(r); } /* - * Pre-filter each and every line for reserved words (one beginning with - * `\*', e.g., `\*(ab'). These must be handled before the actual line - * is processed. - * This also checks the syntax of regular escapes. + * In the current line, expand escape sequences that tend to get + * used in numerical expressions and conditional requests. + * Also check the syntax of the remaining escape sequences. */ -static void +static enum rofferr roff_res(struct roff *r, char **bufp, size_t *szp, int ln, int pos) { - enum mandoc_esc esc; - const char *stesc; /* start of an escape sequence ('\\') */ + char ubuf[24]; /* buffer to print the number */ + const char *start; /* start of the string to process */ + char *stesc; /* start of an escape sequence ('\\') */ const char *stnam; /* start of the name, after "[(*" */ const char *cp; /* end of the name, e.g. before ']' */ const char *res; /* the string to be substituted */ - int i, maxl; - size_t nsz; - char *n; + char *nbuf; /* new buffer to copy bufp to */ + size_t maxl; /* expected length of the escape name */ + size_t naml; /* actual length of the escape name */ + int expand_count; /* to avoid infinite loops */ + int npos; /* position in numeric expression */ + int arg_complete; /* argument not interrupted by eol */ + char term; /* character terminating the escape */ -again: - cp = *bufp + pos; - while (NULL != (cp = strchr(cp, '\\'))) { - stesc = cp++; + expand_count = 0; + start = *bufp + pos; + stesc = strchr(start, '\0') - 1; + while (stesc-- > start) { - /* - * The second character must be an asterisk. - * If it isn't, skip it anyway: It is escaped, - * so it can't start another escape sequence. - */ + /* Search backwards for the next backslash. */ - if ('\0' == *cp) - return; + if ('\\' != *stesc) + continue; - if ('*' != *cp) { - res = cp; - esc = mandoc_escape(&cp, NULL, NULL); - if (ESCAPE_ERROR != esc) - continue; - cp = res; - mandoc_msg - (MANDOCERR_BADESCAPE, r->parse, - ln, (int)(stesc - *bufp), NULL); - return; + /* If it is escaped, skip it. */ + + for (cp = stesc - 1; cp >= start; cp--) + if ('\\' != *cp) + break; + + if (0 == (stesc - cp) % 2) { + stesc = (char *)cp; + continue; } - cp++; + /* Decide whether to expand or to check only. */ + term = '\0'; + cp = stesc + 1; + switch (*cp) { + case '*': + res = NULL; + break; + case 'B': + /* FALLTHROUGH */ + case 'w': + term = cp[1]; + /* FALLTHROUGH */ + case 'n': + res = ubuf; + break; + default: + if (ESCAPE_ERROR == mandoc_escape(&cp, NULL, NULL)) + mandoc_msg(MANDOCERR_BADESCAPE, r->parse, + ln, (int)(stesc - *bufp), NULL); + continue; + } + + if (EXPAND_LIMIT < ++expand_count) { + mandoc_msg(MANDOCERR_ROFFLOOP, r->parse, + ln, (int)(stesc - *bufp), NULL); + return(ROFF_IGN); + } + /* * The third character decides the length - * of the name of the string. + * of the name of the string or register. * Save a pointer to the name. */ - switch (*cp) { - case ('\0'): - return; - case ('('): - cp++; - maxl = 2; - break; - case ('['): - cp++; + if ('\0' == term) { + switch (*++cp) { + case '\0': + maxl = 0; + break; + case '(': + cp++; + maxl = 2; + break; + case '[': + cp++; + term = ']'; + maxl = 0; + break; + default: + maxl = 1; + break; + } + } else { + cp += 2; maxl = 0; - break; - default: - maxl = 1; - break; } stnam = cp; /* Advance to the end of the name. */ - for (i = 0; 0 == maxl || i < maxl; i++, cp++) { + arg_complete = 1; + for (naml = 0; 0 == maxl || naml < maxl; naml++, cp++) { if ('\0' == *cp) { - mandoc_msg - (MANDOCERR_BADESCAPE, - r->parse, ln, - (int)(stesc - *bufp), NULL); - return; + mandoc_msg(MANDOCERR_BADESCAPE, r->parse, + ln, (int)(stesc - *bufp), NULL); + arg_complete = 0; + break; } - if (0 == maxl && ']' == *cp) + if (0 == maxl && *cp == term) { + cp++; break; + } } /* @@ -498,46 +604,69 @@ again: * undefined, resume searching for escapes. */ - res = roff_getstrn(r, stnam, (size_t)i); + switch (stesc[1]) { + case '*': + if (arg_complete) + res = roff_getstrn(r, stnam, naml); + break; + case 'B': + npos = 0; + ubuf[0] = arg_complete && + roff_evalnum(stnam, &npos, NULL, 0) && + stnam + npos + 1 == cp ? '1' : '0'; + ubuf[1] = '\0'; + break; + case 'n': + if (arg_complete) + (void)snprintf(ubuf, sizeof(ubuf), "%d", + roff_getregn(r, stnam, naml)); + else + ubuf[0] = '\0'; + break; + case 'w': + /* use even incomplete args */ + (void)snprintf(ubuf, sizeof(ubuf), "%d", + 24 * (int)naml); + break; + } if (NULL == res) { - mandoc_msg - (MANDOCERR_BADESCAPE, r->parse, - ln, (int)(stesc - *bufp), NULL); + mandoc_msg(MANDOCERR_BADESCAPE, r->parse, + ln, (int)(stesc - *bufp), NULL); res = ""; } /* Replace the escape sequence by the string. */ - pos = stesc - *bufp; + *stesc = '\0'; + *szp = mandoc_asprintf(&nbuf, "%s%s%s", + *bufp, res, cp) + 1; - nsz = *szp + strlen(res) + 1; - n = mandoc_malloc(nsz); + /* Prepare for the next replacement. */ - strlcpy(n, *bufp, (size_t)(stesc - *bufp + 1)); - strlcat(n, res, nsz); - strlcat(n, cp + (maxl ? 0 : 1), nsz); - + start = nbuf + pos; + stesc = nbuf + (stesc - *bufp) + strlen(res); free(*bufp); - - *bufp = n; - *szp = nsz; - goto again; + *bufp = nbuf; } + return(ROFF_CONT); } /* - * Process text streams: convert all breakable hyphens into ASCII_HYPH. + * Process text streams: + * Convert all breakable hyphens into ASCII_HYPH. + * Decrement and spring input line trap. */ static enum rofferr -roff_parsetext(char *p) +roff_parsetext(char **bufp, size_t *szp, int pos, int *offs) { - char l, r; size_t sz; const char *start; + char *p; + int isz; enum mandoc_esc esc; - start = p; + start = p = *bufp + pos; while ('\0' != *p) { sz = strcspn(p, "-\\"); @@ -549,8 +678,7 @@ roff_parsetext(char *p) if ('\\' == *p) { /* Skip over escapes. */ p++; - esc = mandoc_escape - ((const char **)&p, NULL, NULL); + esc = mandoc_escape((const char **)&p, NULL, NULL); if (ESCAPE_ERROR == esc) break; continue; @@ -559,23 +687,29 @@ roff_parsetext(char *p) continue; } - l = *(p - 1); - r = *(p + 1); - if ('\\' != l && - '\t' != r && '\t' != l && - ' ' != r && ' ' != l && - '-' != r && '-' != l && - ! isdigit((unsigned char)l) && - ! isdigit((unsigned char)r)) + if (isalpha((unsigned char)p[-1]) && + isalpha((unsigned char)p[1])) *p = ASCII_HYPH; p++; } + /* Spring the input line trap. */ + if (1 == roffit_lines) { + isz = mandoc_asprintf(&p, "%s\n.%s", *bufp, roffit_macro); + free(*bufp); + *bufp = p; + *szp = isz + 1; + *offs = 0; + free(roffit_macro); + roffit_lines = 0; + return(ROFF_REPARSE); + } else if (1 < roffit_lines) + --roffit_lines; return(ROFF_CONT); } enum rofferr -roff_parseln(struct roff *r, int ln, char **bufp, +roff_parseln(struct roff *r, int ln, char **bufp, size_t *szp, int pos, int *offs) { enum rofft t; @@ -587,10 +721,13 @@ roff_parseln(struct roff *r, int ln, char **bufp, * words to fill in. */ - roff_res(r, bufp, szp, ln, pos); + e = roff_res(r, bufp, szp, ln, pos); + if (ROFF_IGN == e) + return(e); + assert(ROFF_CONT == e); ppos = pos; - ctl = mandoc_getcontrol(*bufp, &pos); + ctl = roff_getcontrol(r, *bufp, &pos); /* * First, if a scope is open and we're not a macro, pass the @@ -603,24 +740,18 @@ roff_parseln(struct roff *r, int ln, char **bufp, if (r->last && ! ctl) { t = r->last->tok; assert(roffs[t].text); - e = (*roffs[t].text) - (r, t, bufp, szp, ln, pos, pos, offs); + e = (*roffs[t].text)(r, t, bufp, szp, ln, pos, pos, offs); assert(ROFF_IGN == e || ROFF_CONT == e); if (ROFF_CONT != e) return(e); - if (r->eqn) - return(eqn_read(&r->eqn, ln, *bufp, pos, offs)); + } + if (r->eqn) + return(eqn_read(&r->eqn, ln, *bufp, ppos, offs)); + if ( ! ctl) { if (r->tbl) return(tbl_read(r->tbl, ln, *bufp, pos)); - return(roff_parsetext(*bufp + pos)); - } else if ( ! ctl) { - if (r->eqn) - return(eqn_read(&r->eqn, ln, *bufp, pos, offs)); - if (r->tbl) - return(tbl_read(r->tbl, ln, *bufp, pos)); - return(roff_parsetext(*bufp + pos)); - } else if (r->eqn) - return(eqn_read(&r->eqn, ln, *bufp, ppos, offs)); + return(roff_parsetext(bufp, szp, pos, offs)); + } /* * If a scope is open, go to the child handler for that macro, @@ -631,9 +762,8 @@ roff_parseln(struct roff *r, int ln, char **bufp, if (r->last) { t = r->last->tok; assert(roffs[t].sub); - return((*roffs[t].sub) - (r, t, bufp, szp, - ln, ppos, pos, offs)); + return((*roffs[t].sub)(r, t, bufp, szp, + ln, ppos, pos, offs)); } /* @@ -642,33 +772,30 @@ roff_parseln(struct roff *r, int ln, char **bufp, * the compilers handle it. */ - if (ROFF_MAX == (t = roff_parse(r, *bufp, &pos))) + if (ROFF_MAX == (t = roff_parse(r, *bufp, &pos, ln, ppos))) return(ROFF_CONT); assert(roffs[t].proc); - return((*roffs[t].proc) - (r, t, bufp, szp, - ln, ppos, pos, offs)); + return((*roffs[t].proc)(r, t, bufp, szp, ln, ppos, pos, offs)); } - void roff_endparse(struct roff *r) { if (r->last) mandoc_msg(MANDOCERR_SCOPEEXIT, r->parse, - r->last->line, r->last->col, NULL); + r->last->line, r->last->col, NULL); if (r->eqn) { - mandoc_msg(MANDOCERR_SCOPEEXIT, r->parse, - r->eqn->eqn.ln, r->eqn->eqn.pos, NULL); + mandoc_msg(MANDOCERR_SCOPEEXIT, r->parse, + r->eqn->eqn.ln, r->eqn->eqn.pos, NULL); eqn_end(&r->eqn); } if (r->tbl) { - mandoc_msg(MANDOCERR_SCOPEEXIT, r->parse, - r->tbl->line, r->tbl->pos, NULL); + mandoc_msg(MANDOCERR_SCOPEEXIT, r->parse, + r->tbl->line, r->tbl->pos, NULL); tbl_end(&r->tbl); } } @@ -678,37 +805,30 @@ roff_endparse(struct roff *r) * form of ".foo xxx" in the usual way. */ static enum rofft -roff_parse(struct roff *r, const char *buf, int *pos) +roff_parse(struct roff *r, char *buf, int *pos, int ln, int ppos) { + char *cp; const char *mac; size_t maclen; enum rofft t; - if ('\0' == buf[*pos] || '"' == buf[*pos] || - '\t' == buf[*pos] || ' ' == buf[*pos]) + cp = buf + *pos; + + if ('\0' == *cp || '"' == *cp || '\t' == *cp || ' ' == *cp) return(ROFF_MAX); - /* - * We stop the macro parse at an escape, tab, space, or nil. - * However, `\}' is also a valid macro, so make sure we don't - * clobber it by seeing the `\' as the end of token. - */ + mac = cp; + maclen = roff_getname(r, &cp, ln, ppos); - mac = buf + *pos; - maclen = strcspn(mac + 1, " \\\t\0") + 1; - t = (r->current_string = roff_getstrn(r, mac, maclen)) ? ROFF_USERDEF : roffhash_find(mac, maclen); - *pos += (int)maclen; + if (ROFF_MAX != t) + *pos = cp - buf; - while (buf[*pos] && ' ' == buf[*pos]) - (*pos)++; - return(t); } -/* ARGSUSED */ static enum rofferr roff_cblock(ROFF_ARGS) { @@ -724,18 +844,18 @@ roff_cblock(ROFF_ARGS) } switch (r->last->tok) { - case (ROFF_am): + case ROFF_am: /* FALLTHROUGH */ - case (ROFF_ami): + case ROFF_ami: /* FALLTHROUGH */ - case (ROFF_am1): + case ROFF_am1: /* FALLTHROUGH */ - case (ROFF_de): + case ROFF_de: /* ROFF_de1 is remapped to ROFF_de in roff_block(). */ /* FALLTHROUGH */ - case (ROFF_dei): + case ROFF_dei: /* FALLTHROUGH */ - case (ROFF_ig): + case ROFF_ig: break; default: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL); @@ -743,7 +863,8 @@ roff_cblock(ROFF_ARGS) } if ((*bufp)[pos]) - mandoc_msg(MANDOCERR_ARGSLOST, r->parse, ln, pos, NULL); + mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos, + ".. %s", *bufp + pos); roffnode_pop(r); roffnode_cleanscope(r); @@ -751,68 +872,61 @@ roff_cblock(ROFF_ARGS) } - static void roffnode_cleanscope(struct roff *r) { while (r->last) { - if (--r->last->endspan < 0) + if (--r->last->endspan != 0) break; roffnode_pop(r); } } - -/* ARGSUSED */ -static enum rofferr -roff_ccond(ROFF_ARGS) +static void +roff_ccond(struct roff *r, int ln, int ppos) { if (NULL == r->last) { mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL); - return(ROFF_IGN); + return; } switch (r->last->tok) { - case (ROFF_el): + case ROFF_el: /* FALLTHROUGH */ - case (ROFF_ie): + case ROFF_ie: /* FALLTHROUGH */ - case (ROFF_if): + case ROFF_if: break; default: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL); - return(ROFF_IGN); + return; } if (r->last->endspan > -1) { mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL); - return(ROFF_IGN); + return; } - if ((*bufp)[pos]) - mandoc_msg(MANDOCERR_ARGSLOST, r->parse, ln, pos, NULL); - roffnode_pop(r); roffnode_cleanscope(r); - return(ROFF_IGN); + return; } - -/* ARGSUSED */ static enum rofferr roff_block(ROFF_ARGS) { - int sv; - size_t sz; - char *name; + char *name, *cp; + size_t namesz; - name = NULL; + name = cp = *bufp + pos; + namesz = 0; if (ROFF_ig != tok) { - if ('\0' == (*bufp)[pos]) { - mandoc_msg(MANDOCERR_NOARGS, r->parse, ln, ppos, NULL); + if ('\0' == *cp) { + mandoc_msg(MANDOCERR_REQ_EMPTY, r->parse, + ln, ppos, roffs[tok].name); return(ROFF_IGN); } @@ -823,64 +937,43 @@ roff_block(ROFF_ARGS) if (ROFF_de1 == tok) tok = ROFF_de; - if (ROFF_de == tok) - name = *bufp + pos; - else + else if (ROFF_de != tok) mandoc_msg(MANDOCERR_REQUEST, r->parse, ln, ppos, roffs[tok].name); - while ((*bufp)[pos] && ! isspace((unsigned char)(*bufp)[pos])) - pos++; + namesz = roff_getname(r, &cp, ln, ppos); + name[namesz] = '\0'; + } else + name = NULL; - while (isspace((unsigned char)(*bufp)[pos])) - (*bufp)[pos++] = '\0'; - } - roffnode_push(r, tok, name, ln, ppos); /* * At the beginning of a `de' macro, clear the existing string * with the same name, if there is one. New content will be - * added from roff_block_text() in multiline mode. + * appended from roff_block_text() in multiline mode. */ - if (ROFF_de == tok) - roff_setstr(r, name, "", 0); + if (namesz && ROFF_de == tok) + roff_setstrn(&r->strtab, name, namesz, "", 0, 0); - if ('\0' == (*bufp)[pos]) + if ('\0' == *cp) return(ROFF_IGN); /* If present, process the custom end-of-line marker. */ - sv = pos; - while ((*bufp)[pos] && ! isspace((unsigned char)(*bufp)[pos])) - pos++; + name = cp; + namesz = roff_getname(r, &cp, ln, ppos); + if (namesz) + r->last->end = mandoc_strndup(name, namesz); - /* - * Note: groff does NOT like escape characters in the input. - * Instead of detecting this, we're just going to let it fly and - * to hell with it. - */ + if ('\0' != *cp) + mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse, + ln, pos, ".%s ... %s", roffs[tok].name, cp); - assert(pos > sv); - sz = (size_t)(pos - sv); - - if (1 == sz && '.' == (*bufp)[sv]) - return(ROFF_IGN); - - r->last->end = mandoc_malloc(sz + 1); - - memcpy(r->last->end, *bufp + sv, sz); - r->last->end[(int)sz] = '\0'; - - if ((*bufp)[pos]) - mandoc_msg(MANDOCERR_ARGSLOST, r->parse, ln, pos, NULL); - return(ROFF_IGN); } - -/* ARGSUSED */ static enum rofferr roff_block_sub(ROFF_ARGS) { @@ -901,10 +994,10 @@ roff_block_sub(ROFF_ARGS) if ((*bufp)[i] != r->last->end[j]) break; - if ('\0' == r->last->end[j] && - ('\0' == (*bufp)[i] || - ' ' == (*bufp)[i] || - '\t' == (*bufp)[i])) { + if ('\0' == r->last->end[j] && + ('\0' == (*bufp)[i] || + ' ' == (*bufp)[i] || + '\t' == (*bufp)[i])) { roffnode_pop(r); roffnode_cleanscope(r); @@ -912,7 +1005,7 @@ roff_block_sub(ROFF_ARGS) i++; pos = i; - if (ROFF_MAX != roff_parse(r, *bufp, &pos)) + if (ROFF_MAX != roff_parse(r, *bufp, &pos, ln, ppos)) return(ROFF_RERUN); return(ROFF_IGN); } @@ -923,7 +1016,7 @@ roff_block_sub(ROFF_ARGS) * pulling it out of the hashtable. */ - t = roff_parse(r, *bufp, &pos); + t = roff_parse(r, *bufp, &pos, ln, ppos); /* * Macros other than block-end are only significant @@ -931,328 +1024,747 @@ roff_block_sub(ROFF_ARGS) */ if (ROFF_cblock != t) { if (ROFF_de == tok) - roff_setstr(r, r->last->name, *bufp + ppos, 1); + roff_setstr(r, r->last->name, *bufp + ppos, 2); return(ROFF_IGN); } assert(roffs[t].proc); - return((*roffs[t].proc)(r, t, bufp, szp, - ln, ppos, pos, offs)); + return((*roffs[t].proc)(r, t, bufp, szp, ln, ppos, pos, offs)); } - -/* ARGSUSED */ static enum rofferr roff_block_text(ROFF_ARGS) { if (ROFF_de == tok) - roff_setstr(r, r->last->name, *bufp + pos, 1); + roff_setstr(r, r->last->name, *bufp + pos, 2); return(ROFF_IGN); } - -/* ARGSUSED */ static enum rofferr roff_cond_sub(ROFF_ARGS) { enum rofft t; - enum roffrule rr; char *ep; + int rr; rr = r->last->rule; roffnode_cleanscope(r); + t = roff_parse(r, *bufp, &pos, ln, ppos); /* - * If the macro is unknown, first check if it contains a closing - * delimiter `\}'. If it does, close out our scope and return - * the currently-scoped rule (ignore or continue). Else, drop - * into the currently-scoped rule. + * Fully handle known macros when they are structurally + * required or when the conditional evaluated to true. */ - if (ROFF_MAX == (t = roff_parse(r, *bufp, &pos))) { - ep = &(*bufp)[pos]; - for ( ; NULL != (ep = strchr(ep, '\\')); ep++) { - ep++; - if ('}' != *ep) - continue; - - /* - * Make the \} go away. - * This is a little haphazard, as it's not quite - * clear how nroff does this. - * If we're at the end of line, then just chop - * off the \} and resize the buffer. - * If we aren't, then conver it to spaces. - */ - - if ('\0' == *(ep + 1)) { - *--ep = '\0'; - *szp -= 2; - } else - *(ep - 1) = *ep = ' '; - - roff_ccond(r, ROFF_ccond, bufp, szp, - ln, pos, pos + 2, offs); - break; - } - return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT); + if ((ROFF_MAX != t) && + (rr || ROFFMAC_STRUCT & roffs[t].flags)) { + assert(roffs[t].proc); + return((*roffs[t].proc)(r, t, bufp, szp, + ln, ppos, pos, offs)); } /* - * A denied conditional must evaluate its children if and only - * if they're either structurally required (such as loops and - * conditionals) or a closing macro. + * If `\}' occurs on a macro line without a preceding macro, + * drop the line completely. */ - if (ROFFRULE_DENY == rr) - if ( ! (ROFFMAC_STRUCT & roffs[t].flags)) - if (ROFF_ccond != t) - return(ROFF_IGN); + ep = *bufp + pos; + if ('\\' == ep[0] && '}' == ep[1]) + rr = 0; - assert(roffs[t].proc); - return((*roffs[t].proc)(r, t, bufp, szp, - ln, ppos, pos, offs)); + /* Always check for the closing delimiter `\}'. */ + + while (NULL != (ep = strchr(ep, '\\'))) { + if ('}' == *(++ep)) { + *ep = '&'; + roff_ccond(r, ln, ep - *bufp - 1); + } + ++ep; + } + return(rr ? ROFF_CONT : ROFF_IGN); } -/* ARGSUSED */ static enum rofferr roff_cond_text(ROFF_ARGS) { char *ep; - enum roffrule rr; + int rr; rr = r->last->rule; roffnode_cleanscope(r); - ep = &(*bufp)[pos]; - for ( ; NULL != (ep = strchr(ep, '\\')); ep++) { - ep++; - if ('}' != *ep) - continue; - *ep = '&'; - roff_ccond(r, ROFF_ccond, bufp, szp, - ln, pos, pos + 2, offs); + ep = *bufp + pos; + while (NULL != (ep = strchr(ep, '\\'))) { + if ('}' == *(++ep)) { + *ep = '&'; + roff_ccond(r, ln, ep - *bufp - 1); + } + ++ep; } - return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT); + return(rr ? ROFF_CONT : ROFF_IGN); } -static enum roffrule +/* + * Parse a single signed integer number. Stop at the first non-digit. + * If there is at least one digit, return success and advance the + * parse point, else return failure and let the parse point unchanged. + * Ignore overflows, treat them just like the C language. + */ +static int +roff_getnum(const char *v, int *pos, int *res) +{ + int myres, n, p; + + if (NULL == res) + res = &myres; + + p = *pos; + n = v[p] == '-'; + if (n) + p++; + + for (*res = 0; isdigit((unsigned char)v[p]); p++) + *res = 10 * *res + v[p] - '0'; + if (p == *pos + n) + return 0; + + if (n) + *res = -*res; + + *pos = p; + return 1; +} + +/* + * Evaluate a string comparison condition. + * The first character is the delimiter. + * Succeed if the string up to its second occurrence + * matches the string up to its third occurence. + * Advance the cursor after the third occurrence + * or lacking that, to the end of the line. + */ +static int +roff_evalstrcond(const char *v, int *pos) +{ + const char *s1, *s2, *s3; + int match; + + match = 0; + s1 = v + *pos; /* initial delimiter */ + s2 = s1 + 1; /* for scanning the first string */ + s3 = strchr(s2, *s1); /* for scanning the second string */ + + if (NULL == s3) /* found no middle delimiter */ + goto out; + + while ('\0' != *++s3) { + if (*s2 != *s3) { /* mismatch */ + s3 = strchr(s3, *s1); + break; + } + if (*s3 == *s1) { /* found the final delimiter */ + match = 1; + break; + } + s2++; + } + +out: + if (NULL == s3) + s3 = strchr(s2, '\0'); + else + s3++; + *pos = s3 - v; + return(match); +} + +/* + * Evaluate an optionally negated single character, numerical, + * or string condition. + */ +static int roff_evalcond(const char *v, int *pos) { + int wanttrue, number; + if ('!' == v[*pos]) { + wanttrue = 0; + (*pos)++; + } else + wanttrue = 1; + switch (v[*pos]) { - case ('n'): + case 'n': + /* FALLTHROUGH */ + case 'o': (*pos)++; - return(ROFFRULE_ALLOW); - case ('e'): + return(wanttrue); + case 'c': /* FALLTHROUGH */ - case ('o'): + case 'd': /* FALLTHROUGH */ - case ('t'): + case 'e': + /* FALLTHROUGH */ + case 'r': + /* FALLTHROUGH */ + case 't': (*pos)++; - return(ROFFRULE_DENY); + return(!wanttrue); default: break; } - while (v[*pos] && ' ' != v[*pos]) - (*pos)++; - return(ROFFRULE_DENY); + if (roff_evalnum(v, pos, &number, 0)) + return((number > 0) == wanttrue); + else + return(roff_evalstrcond(v, pos) == wanttrue); } -/* ARGSUSED */ static enum rofferr roff_line_ignore(ROFF_ARGS) { - if (ROFF_it == tok) - mandoc_msg(MANDOCERR_REQUEST, r->parse, ln, ppos, "it"); - return(ROFF_IGN); } -/* ARGSUSED */ static enum rofferr roff_cond(ROFF_ARGS) { - int sv; - enum roffrule rule; - /* + roffnode_push(r, tok, NULL, ln, ppos); + + /* * An `.el' has no conditional body: it will consume the value * of the current rstack entry set in prior `ie' calls or - * defaults to DENY. + * defaults to DENY. * * If we're not an `el', however, then evaluate the conditional. */ - rule = ROFF_el == tok ? - (r->rstackpos < 0 ? - ROFFRULE_DENY : r->rstack[r->rstackpos--]) : - roff_evalcond(*bufp, &pos); + r->last->rule = ROFF_el == tok ? + (r->rstackpos < 0 ? 0 : r->rstack[r->rstackpos--]) : + roff_evalcond(*bufp, &pos); - sv = pos; - while (' ' == (*bufp)[pos]) - pos++; - /* - * Roff is weird. If we have just white-space after the - * conditional, it's considered the BODY and we exit without - * really doing anything. Warn about this. It's probably - * wrong. - */ - - if ('\0' == (*bufp)[pos] && sv != pos) { - mandoc_msg(MANDOCERR_NOARGS, r->parse, ln, ppos, NULL); - return(ROFF_IGN); - } - - roffnode_push(r, tok, NULL, ln, ppos); - - r->last->rule = rule; - - /* * An if-else will put the NEGATION of the current evaluated * conditional into the stack of rules. */ if (ROFF_ie == tok) { if (r->rstackpos == RSTACK_MAX - 1) { - mandoc_msg(MANDOCERR_MEM, - r->parse, ln, ppos, NULL); + mandoc_msg(MANDOCERR_MEM, + r->parse, ln, ppos, NULL); return(ROFF_ERR); } - r->rstack[++r->rstackpos] = - ROFFRULE_DENY == r->last->rule ? - ROFFRULE_ALLOW : ROFFRULE_DENY; + r->rstack[++r->rstackpos] = !r->last->rule; } /* If the parent has false as its rule, then so do we. */ - if (r->last->parent && ROFFRULE_DENY == r->last->parent->rule) - r->last->rule = ROFFRULE_DENY; + if (r->last->parent && !r->last->parent->rule) + r->last->rule = 0; /* - * Determine scope. If we're invoked with "\{" trailing the - * conditional, then we're in a multiline scope. Else our scope - * expires on the next line. + * Determine scope. + * If there is nothing on the line after the conditional, + * not even whitespace, use next-line scope. */ - r->last->endspan = 1; + if ('\0' == (*bufp)[pos]) { + r->last->endspan = 2; + goto out; + } + while (' ' == (*bufp)[pos]) + pos++; + + /* An opening brace requests multiline scope. */ + if ('\\' == (*bufp)[pos] && '{' == (*bufp)[pos + 1]) { r->last->endspan = -1; pos += 2; - } + goto out; + } /* - * If there are no arguments on the line, the next-line scope is - * assumed. + * Anything else following the conditional causes + * single-line scope. Warn if the scope contains + * nothing but trailing whitespace. */ if ('\0' == (*bufp)[pos]) - return(ROFF_IGN); + mandoc_msg(MANDOCERR_COND_EMPTY, r->parse, + ln, ppos, roffs[tok].name); - /* Otherwise re-run the roff parser after recalculating. */ + r->last->endspan = 1; +out: *offs = pos; return(ROFF_RERUN); } - -/* ARGSUSED */ static enum rofferr roff_ds(ROFF_ARGS) { - char *name, *string; + char *string; + const char *name; + size_t namesz; /* - * A symbol is named by the first word following the macro - * invocation up to a space. Its value is anything after the - * name's trailing whitespace and optional double-quote. Thus, - * - * [.ds foo "bar " ] - * - * will have `bar " ' as its value. + * The first word is the name of the string. + * If it is empty or terminated by an escape sequence, + * abort the `ds' request without defining anything. */ - string = *bufp + pos; - name = roff_getname(r, &string, ln, pos); + name = string = *bufp + pos; if ('\0' == *name) return(ROFF_IGN); - /* Read past initial double-quote. */ + namesz = roff_getname(r, &string, ln, pos); + if ('\\' == name[namesz]) + return(ROFF_IGN); + + /* Read past the initial double-quote, if any. */ if ('"' == *string) string++; /* The rest is the value. */ - roff_setstr(r, name, string, 0); + roff_setstrn(&r->strtab, name, namesz, string, strlen(string), + ROFF_as == tok); return(ROFF_IGN); } -int -roff_regisset(const struct roff *r, enum regs reg) +/* + * Parse a single operator, one or two characters long. + * If the operator is recognized, return success and advance the + * parse point, else return failure and let the parse point unchanged. + */ +static int +roff_getop(const char *v, int *pos, char *res) { - return(r->regs[(int)reg].set); + *res = v[*pos]; + + switch (*res) { + case '+': + /* FALLTHROUGH */ + case '-': + /* FALLTHROUGH */ + case '*': + /* FALLTHROUGH */ + case '/': + /* FALLTHROUGH */ + case '%': + /* FALLTHROUGH */ + case '&': + /* FALLTHROUGH */ + case ':': + break; + case '<': + switch (v[*pos + 1]) { + case '=': + *res = 'l'; + (*pos)++; + break; + case '>': + *res = '!'; + (*pos)++; + break; + case '?': + *res = 'i'; + (*pos)++; + break; + default: + break; + } + break; + case '>': + switch (v[*pos + 1]) { + case '=': + *res = 'g'; + (*pos)++; + break; + case '?': + *res = 'a'; + (*pos)++; + break; + default: + break; + } + break; + case '=': + if ('=' == v[*pos + 1]) + (*pos)++; + break; + default: + return(0); + } + (*pos)++; + + return(*res); } -unsigned int -roff_regget(const struct roff *r, enum regs reg) +/* + * Evaluate either a parenthesized numeric expression + * or a single signed integer number. + */ +static int +roff_evalpar(const char *v, int *pos, int *res) { - return(r->regs[(int)reg].u); + if ('(' != v[*pos]) + return(roff_getnum(v, pos, res)); + + (*pos)++; + if ( ! roff_evalnum(v, pos, res, 1)) + return(0); + + /* + * Omission of the closing parenthesis + * is an error in validation mode, + * but ignored in evaluation mode. + */ + + if (')' == v[*pos]) + (*pos)++; + else if (NULL == res) + return(0); + + return(1); } +/* + * Evaluate a complete numeric expression. + * Proceed left to right, there is no concept of precedence. + */ +static int +roff_evalnum(const char *v, int *pos, int *res, int skipwhite) +{ + int mypos, operand2; + char operator; + + if (NULL == pos) { + mypos = 0; + pos = &mypos; + } + + if (skipwhite) + while (isspace((unsigned char)v[*pos])) + (*pos)++; + + if ( ! roff_evalpar(v, pos, res)) + return(0); + + while (1) { + if (skipwhite) + while (isspace((unsigned char)v[*pos])) + (*pos)++; + + if ( ! roff_getop(v, pos, &operator)) + break; + + if (skipwhite) + while (isspace((unsigned char)v[*pos])) + (*pos)++; + + if ( ! roff_evalpar(v, pos, &operand2)) + return(0); + + if (skipwhite) + while (isspace((unsigned char)v[*pos])) + (*pos)++; + + if (NULL == res) + continue; + + switch (operator) { + case '+': + *res += operand2; + break; + case '-': + *res -= operand2; + break; + case '*': + *res *= operand2; + break; + case '/': + *res /= operand2; + break; + case '%': + *res %= operand2; + break; + case '<': + *res = *res < operand2; + break; + case '>': + *res = *res > operand2; + break; + case 'l': + *res = *res <= operand2; + break; + case 'g': + *res = *res >= operand2; + break; + case '=': + *res = *res == operand2; + break; + case '!': + *res = *res != operand2; + break; + case '&': + *res = *res && operand2; + break; + case ':': + *res = *res || operand2; + break; + case 'i': + if (operand2 < *res) + *res = operand2; + break; + case 'a': + if (operand2 > *res) + *res = operand2; + break; + default: + abort(); + } + } + return(1); +} + void -roff_regunset(struct roff *r, enum regs reg) +roff_setreg(struct roff *r, const char *name, int val, char sign) { + struct roffreg *reg; - r->regs[(int)reg].set = 0; + /* Search for an existing register with the same name. */ + reg = r->regtab; + + while (reg && strcmp(name, reg->key.p)) + reg = reg->next; + + if (NULL == reg) { + /* Create a new register. */ + reg = mandoc_malloc(sizeof(struct roffreg)); + reg->key.p = mandoc_strdup(name); + reg->key.sz = strlen(name); + reg->val = 0; + reg->next = r->regtab; + r->regtab = reg; + } + + if ('+' == sign) + reg->val += val; + else if ('-' == sign) + reg->val -= val; + else + reg->val = val; } -/* ARGSUSED */ +/* + * Handle some predefined read-only number registers. + * For now, return -1 if the requested register is not predefined; + * in case a predefined read-only register having the value -1 + * were to turn up, another special value would have to be chosen. + */ +static int +roff_getregro(const char *name) +{ + + switch (*name) { + case 'A': /* ASCII approximation mode is always off. */ + return(0); + case 'g': /* Groff compatibility mode is always on. */ + return(1); + case 'H': /* Fixed horizontal resolution. */ + return (24); + case 'j': /* Always adjust left margin only. */ + return(0); + case 'T': /* Some output device is always defined. */ + return(1); + case 'V': /* Fixed vertical resolution. */ + return (40); + default: + return (-1); + } +} + +int +roff_getreg(const struct roff *r, const char *name) +{ + struct roffreg *reg; + int val; + + if ('.' == name[0] && '\0' != name[1] && '\0' == name[2]) { + val = roff_getregro(name + 1); + if (-1 != val) + return (val); + } + + for (reg = r->regtab; reg; reg = reg->next) + if (0 == strcmp(name, reg->key.p)) + return(reg->val); + + return(0); +} + +static int +roff_getregn(const struct roff *r, const char *name, size_t len) +{ + struct roffreg *reg; + int val; + + if ('.' == name[0] && 2 == len) { + val = roff_getregro(name + 1); + if (-1 != val) + return (val); + } + + for (reg = r->regtab; reg; reg = reg->next) + if (len == reg->key.sz && + 0 == strncmp(name, reg->key.p, len)) + return(reg->val); + + return(0); +} + +static void +roff_freereg(struct roffreg *reg) +{ + struct roffreg *old_reg; + + while (NULL != reg) { + free(reg->key.p); + old_reg = reg; + reg = reg->next; + free(old_reg); + } +} + static enum rofferr roff_nr(ROFF_ARGS) { - const char *key; - char *val; + char *key, *val; + size_t keysz; int iv; + char sign; - val = *bufp + pos; - key = roff_getname(r, &val, ln, pos); + key = val = *bufp + pos; + if ('\0' == *key) + return(ROFF_IGN); - if (0 == strcmp(key, "nS")) { - r->regs[(int)REG_nS].set = 1; - if ((iv = mandoc_strntoi(val, strlen(val), 10)) >= 0) - r->regs[(int)REG_nS].u = (unsigned)iv; - else - r->regs[(int)REG_nS].u = 0u; - } + keysz = roff_getname(r, &val, ln, pos); + if ('\\' == key[keysz]) + return(ROFF_IGN); + key[keysz] = '\0'; + sign = *val; + if ('+' == sign || '-' == sign) + val++; + + if (roff_evalnum(val, NULL, &iv, 0)) + roff_setreg(r, key, iv, sign); + return(ROFF_IGN); } -/* ARGSUSED */ static enum rofferr +roff_rr(ROFF_ARGS) +{ + struct roffreg *reg, **prev; + char *name, *cp; + size_t namesz; + + name = cp = *bufp + pos; + if ('\0' == *name) + return(ROFF_IGN); + namesz = roff_getname(r, &cp, ln, pos); + name[namesz] = '\0'; + + prev = &r->regtab; + while (1) { + reg = *prev; + if (NULL == reg || !strcmp(name, reg->key.p)) + break; + prev = ®->next; + } + if (NULL != reg) { + *prev = reg->next; + free(reg->key.p); + free(reg); + } + return(ROFF_IGN); +} + +static enum rofferr roff_rm(ROFF_ARGS) { const char *name; char *cp; + size_t namesz; cp = *bufp + pos; while ('\0' != *cp) { - name = roff_getname(r, &cp, ln, (int)(cp - *bufp)); - if ('\0' != *name) - roff_setstr(r, name, NULL, 0); + name = cp; + namesz = roff_getname(r, &cp, ln, (int)(cp - *bufp)); + roff_setstrn(&r->strtab, name, namesz, NULL, 0, 0); + if ('\\' == name[namesz]) + break; } return(ROFF_IGN); } -/* ARGSUSED */ static enum rofferr +roff_it(ROFF_ARGS) +{ + char *cp; + size_t len; + int iv; + + /* Parse the number of lines. */ + cp = *bufp + pos; + len = strcspn(cp, " \t"); + cp[len] = '\0'; + if ((iv = mandoc_strntoi(cp, len, 10)) <= 0) { + mandoc_msg(MANDOCERR_NUMERIC, r->parse, + ln, ppos, *bufp + 1); + return(ROFF_IGN); + } + cp += len + 1; + + /* Arm the input line trap. */ + roffit_lines = iv; + roffit_macro = mandoc_strdup(cp); + return(ROFF_IGN); +} + +static enum rofferr +roff_Dd(ROFF_ARGS) +{ + const char *const *cp; + + if (0 == ((MPARSE_MDOC | MPARSE_QUICK) & r->options)) + for (cp = __mdoc_reserved; *cp; cp++) + roff_setstr(r, *cp, NULL, 0); + + return(ROFF_CONT); +} + +static enum rofferr +roff_TH(ROFF_ARGS) +{ + const char *const *cp; + + if (0 == (MPARSE_QUICK & r->options)) + for (cp = __man_reserved; *cp; cp++) + roff_setstr(r, *cp, NULL, 0); + + return(ROFF_CONT); +} + +static enum rofferr roff_TE(ROFF_ARGS) { @@ -1264,7 +1776,6 @@ roff_TE(ROFF_ARGS) return(ROFF_IGN); } -/* ARGSUSED */ static enum rofferr roff_T_(ROFF_ARGS) { @@ -1287,7 +1798,7 @@ roff_closeeqn(struct roff *r) #endif static void -roff_openeqn(struct roff *r, const char *name, int line, +roff_openeqn(struct roff *r, const char *name, int line, int offs, const char *buf) { struct eqn_node *e; @@ -1309,7 +1820,6 @@ roff_openeqn(struct roff *r, const char *name, int lin } } -/* ARGSUSED */ static enum rofferr roff_EQ(ROFF_ARGS) { @@ -1318,7 +1828,6 @@ roff_EQ(ROFF_ARGS) return(ROFF_IGN); } -/* ARGSUSED */ static enum rofferr roff_EN(ROFF_ARGS) { @@ -1327,30 +1836,44 @@ roff_EN(ROFF_ARGS) return(ROFF_IGN); } -/* ARGSUSED */ static enum rofferr roff_TS(ROFF_ARGS) { - struct tbl_node *t; + struct tbl_node *tbl; if (r->tbl) { mandoc_msg(MANDOCERR_SCOPEBROKEN, r->parse, ln, ppos, NULL); tbl_end(&r->tbl); } - t = tbl_alloc(ppos, ln, r->parse); + tbl = tbl_alloc(ppos, ln, r->parse); if (r->last_tbl) - r->last_tbl->next = t; + r->last_tbl->next = tbl; else - r->first_tbl = r->last_tbl = t; + r->first_tbl = r->last_tbl = tbl; - r->tbl = r->last_tbl = t; + r->tbl = r->last_tbl = tbl; return(ROFF_IGN); } -/* ARGSUSED */ static enum rofferr +roff_cc(ROFF_ARGS) +{ + const char *p; + + p = *bufp + pos; + + if ('\0' == *p || '.' == (r->control = *p++)) + r->control = 0; + + if ('\0' != *p) + mandoc_msg(MANDOCERR_ARGCOUNT, r->parse, ln, ppos, NULL); + + return(ROFF_IGN); +} + +static enum rofferr roff_tr(ROFF_ARGS) { const char *p, *first, *second; @@ -1371,9 +1894,9 @@ roff_tr(ROFF_ARGS) if ('\\' == *first) { esc = mandoc_escape(&p, NULL, NULL); if (ESCAPE_ERROR == esc) { - mandoc_msg - (MANDOCERR_BADESCAPE, r->parse, - ln, (int)(p - *bufp), NULL); + mandoc_msg(MANDOCERR_BADESCAPE, + r->parse, ln, + (int)(p - *bufp), NULL); return(ROFF_IGN); } fsz = (size_t)(p - first); @@ -1383,32 +1906,44 @@ roff_tr(ROFF_ARGS) if ('\\' == *second) { esc = mandoc_escape(&p, NULL, NULL); if (ESCAPE_ERROR == esc) { - mandoc_msg - (MANDOCERR_BADESCAPE, r->parse, - ln, (int)(p - *bufp), NULL); + mandoc_msg(MANDOCERR_BADESCAPE, + r->parse, ln, + (int)(p - *bufp), NULL); return(ROFF_IGN); } ssz = (size_t)(p - second); } else if ('\0' == *second) { - mandoc_msg(MANDOCERR_ARGCOUNT, r->parse, - ln, (int)(p - *bufp), NULL); + mandoc_msg(MANDOCERR_ARGCOUNT, r->parse, + ln, (int)(p - *bufp), NULL); second = " "; p--; } - roff_setstrn(&r->chrtab, first, fsz, second, ssz, 0); + if (fsz > 1) { + roff_setstrn(&r->xmbtab, first, fsz, + second, ssz, 0); + continue; + } + + if (NULL == r->xtab) + r->xtab = mandoc_calloc(128, + sizeof(struct roffstr)); + + free(r->xtab[(int)*first].p); + r->xtab[(int)*first].p = mandoc_strndup(second, ssz); + r->xtab[(int)*first].sz = ssz; } return(ROFF_IGN); } -/* ARGSUSED */ static enum rofferr roff_so(ROFF_ARGS) { char *name; - mandoc_msg(MANDOCERR_SO, r->parse, ln, ppos, NULL); + name = *bufp + pos; + mandoc_vmsg(MANDOCERR_SO, r->parse, ln, ppos, ".so %s", name); /* * Handle `so'. Be EXTREMELY careful, as we shouldn't be @@ -1417,9 +1952,9 @@ roff_so(ROFF_ARGS) * or using absolute paths. */ - name = *bufp + pos; if ('/' == *name || strstr(name, "../") || strstr(name, "/..")) { - mandoc_msg(MANDOCERR_SOPATH, r->parse, ln, pos, NULL); + mandoc_vmsg(MANDOCERR_SO_PATH, r->parse, ln, ppos, + ".so %s", name); return(ROFF_ERR); } @@ -1427,7 +1962,6 @@ roff_so(ROFF_ARGS) return(ROFF_SO); } -/* ARGSUSED */ static enum rofferr roff_userdef(ROFF_ARGS) { @@ -1437,7 +1971,7 @@ roff_userdef(ROFF_ARGS) /* * Collect pointers to macro argument strings - * and null-terminate them. + * and NUL-terminate them. */ cp = *bufp + pos; for (i = 0; i < 9; i++) @@ -1456,14 +1990,9 @@ roff_userdef(ROFF_ARGS) cp += 2; continue; } - - *szp = strlen(n1) - 3 + strlen(arg[i]) + 1; - n2 = mandoc_malloc(*szp); - - strlcpy(n2, n1, (size_t)(cp - n1 + 1)); - strlcat(n2, arg[i], *szp); - strlcat(n2, cp + 3, *szp); - + *cp = '\0'; + *szp = mandoc_asprintf(&n2, "%s%s%s", + n1, arg[i], cp + 3) + 1; cp = n2 + (cp - n1); free(n1); n1 = n2; @@ -1482,57 +2011,62 @@ roff_userdef(ROFF_ARGS) ROFF_REPARSE : ROFF_APPEND); } -static char * +static size_t roff_getname(struct roff *r, char **cpp, int ln, int pos) { char *name, *cp; + size_t namesz; name = *cpp; if ('\0' == *name) - return(name); + return(0); - /* Read until end of name. */ - for (cp = name; '\0' != *cp && ' ' != *cp; cp++) { + /* Read until end of name and terminate it with NUL. */ + for (cp = name; 1; cp++) { + if ('\0' == *cp || ' ' == *cp) { + namesz = cp - name; + break; + } if ('\\' != *cp) continue; + namesz = cp - name; + if ('{' == cp[1] || '}' == cp[1]) + break; cp++; if ('\\' == *cp) continue; mandoc_msg(MANDOCERR_NAMESC, r->parse, ln, pos, NULL); - *cp = '\0'; - name = cp; + mandoc_escape((const char **)&cp, NULL, NULL); + break; } - /* Nil-terminate name. */ - if ('\0' != *cp) - *(cp++) = '\0'; - /* Read past spaces. */ while (' ' == *cp) cp++; *cpp = cp; - return(name); + return(namesz); } /* * Store *string into the user-defined string called *name. - * In multiline mode, append to an existing entry and append '\n'; - * else replace the existing entry, if there is one. * To clear an existing entry, call with (*r, *name, NULL, 0). + * append == 0: replace mode + * append == 1: single-line append mode + * append == 2: multiline append mode, append '\n' after each call */ static void roff_setstr(struct roff *r, const char *name, const char *string, - int multiline) + int append) { roff_setstrn(&r->strtab, name, strlen(name), string, - string ? strlen(string) : 0, multiline); + string ? strlen(string) : 0, append); } static void roff_setstrn(struct roffkv **r, const char *name, size_t namesz, - const char *string, size_t stringsz, int multiline) + const char *string, size_t stringsz, int append) { struct roffkv *n; char *c; @@ -1542,7 +2076,8 @@ roff_setstrn(struct roffkv **r, const char *name, size /* Search for an existing string with the same name. */ n = *r; - while (n && strcmp(name, n->key.p)) + while (n && (namesz != n->key.sz || + strncmp(n->key.p, name, namesz))) n = n->next; if (NULL == n) { @@ -1554,8 +2089,7 @@ roff_setstrn(struct roffkv **r, const char *name, size n->val.sz = 0; n->next = *r; *r = n; - } else if (0 == multiline) { - /* In multiline mode, append; else replace. */ + } else if (0 == append) { free(n->val.p); n->val.p = NULL; n->val.sz = 0; @@ -1568,7 +2102,7 @@ roff_setstrn(struct roffkv **r, const char *name, size * One additional byte for the '\n' in multiline mode, * and one for the terminating '\0'. */ - newch = stringsz + (multiline ? 2u : 1u); + newch = stringsz + (1 < append ? 2u : 1u); if (NULL == n->val.p) { n->val.p = mandoc_malloc(newch); @@ -1595,7 +2129,7 @@ roff_setstrn(struct roffkv **r, const char *name, size } /* Append terminating bytes. */ - if (multiline) + if (1 < append) *c++ = '\n'; *c = '\0'; @@ -1606,51 +2140,48 @@ static const char * roff_getstrn(const struct roff *r, const char *name, size_t len) { const struct roffkv *n; + int i; for (n = r->strtab; n; n = n->next) - if (0 == strncmp(name, n->key.p, len) && - '\0' == n->key.p[(int)len]) + if (0 == strncmp(name, n->key.p, len) && + '\0' == n->key.p[(int)len]) return(n->val.p); + for (i = 0; i < PREDEFS_MAX; i++) + if (0 == strncmp(name, predefs[i].name, len) && + '\0' == predefs[i].name[(int)len]) + return(predefs[i].str); + return(NULL); } static void -roff_freestr(struct roffkv **r) +roff_freestr(struct roffkv *r) { struct roffkv *n, *nn; - for (n = *r; n; n = nn) { + for (n = r; n; n = nn) { free(n->key.p); free(n->val.p); nn = n->next; free(n); } - - *r = NULL; } const struct tbl_span * roff_span(const struct roff *r) { - + return(r->tbl ? tbl_span(r->tbl) : NULL); } const struct eqn * roff_eqn(const struct roff *r) { - + return(r->last_eqn ? &r->last_eqn->eqn : NULL); } -char -roff_eqndelim(const struct roff *r) -{ - - return('\0'); -} - /* * Duplicate an input string, making the appropriate character * conversations (as stipulated by `tr') along the way. @@ -1665,7 +2196,7 @@ roff_strdup(const struct roff *r, const char *p) size_t ssz, sz; enum mandoc_esc esc; - if (NULL == r->chrtab) + if (NULL == r->xmbtab && NULL == r->xtab) return(mandoc_strdup(p)); else if ('\0' == *p) return(mandoc_strdup("")); @@ -1682,8 +2213,21 @@ roff_strdup(const struct roff *r, const char *p) ssz = 0; while ('\0' != *p) { + if ('\\' != *p && r->xtab && r->xtab[(int)*p].p) { + sz = r->xtab[(int)*p].sz; + res = mandoc_realloc(res, ssz + sz + 1); + memcpy(res + ssz, r->xtab[(int)*p].p, sz); + ssz += sz; + p++; + continue; + } else if ('\\' != *p) { + res = mandoc_realloc(res, ssz + 2); + res[ssz++] = *p++; + continue; + } + /* Search for term matches. */ - for (cp = r->chrtab; cp; cp = cp->next) + for (cp = r->xmbtab; cp; cp = cp->next) if (0 == strncmp(p, cp->key.p, cp->key.sz)) break; @@ -1693,46 +2237,74 @@ roff_strdup(const struct roff *r, const char *p) * Append the match to the array and move * forward by its keysize. */ - res = mandoc_realloc - (res, ssz + cp->val.sz + 1); + res = mandoc_realloc(res, + ssz + cp->val.sz + 1); memcpy(res + ssz, cp->val.p, cp->val.sz); ssz += cp->val.sz; p += (int)cp->key.sz; continue; } - if ('\\' == *p) { - /* - * Handle escapes carefully: we need to copy - * over just the escape itself, or else we might - * do replacements within the escape itself. - * Make sure to pass along the bogus string. - */ - pp = p++; - esc = mandoc_escape(&p, NULL, NULL); - if (ESCAPE_ERROR == esc) { - sz = strlen(pp); - res = mandoc_realloc(res, ssz + sz + 1); - memcpy(res + ssz, pp, sz); - break; - } - /* - * We bail out on bad escapes. - * No need to warn: we already did so when - * roff_res() was called. - */ - sz = (int)(p - pp); + /* + * Handle escapes carefully: we need to copy + * over just the escape itself, or else we might + * do replacements within the escape itself. + * Make sure to pass along the bogus string. + */ + pp = p++; + esc = mandoc_escape(&p, NULL, NULL); + if (ESCAPE_ERROR == esc) { + sz = strlen(pp); res = mandoc_realloc(res, ssz + sz + 1); memcpy(res + ssz, pp, sz); - ssz += sz; - continue; + break; } - - /* Just append the charater. */ - res = mandoc_realloc(res, ssz + 2); - res[ssz++] = *p++; + /* + * We bail out on bad escapes. + * No need to warn: we already did so when + * roff_res() was called. + */ + sz = (int)(p - pp); + res = mandoc_realloc(res, ssz + sz + 1); + memcpy(res + ssz, pp, sz); + ssz += sz; } res[(int)ssz] = '\0'; return(res); +} + +/* + * Find out whether a line is a macro line or not. + * If it is, adjust the current position and return one; if it isn't, + * return zero and don't change the current position. + * If the control character has been set with `.cc', then let that grain + * precedence. + * This is slighly contrary to groff, where using the non-breaking + * control character when `cc' has been invoked will cause the + * non-breaking macro contents to be printed verbatim. + */ +int +roff_getcontrol(const struct roff *r, const char *cp, int *ppos) +{ + int pos; + + pos = *ppos; + + if (0 != r->control && cp[pos] == r->control) + pos++; + else if (0 != r->control) + return(0); + else if ('\\' == cp[pos] && '.' == cp[pos + 1]) + pos += 2; + else if ('.' == cp[pos] || '\'' == cp[pos]) + pos++; + else + return(0); + + while (' ' == cp[pos] || '\t' == cp[pos]) + pos++; + + *ppos = pos; + return(1); }