=================================================================== RCS file: /cvs/mandoc/roff.c,v retrieving revision 1.182 retrieving revision 1.192 diff -u -p -r1.182 -r1.192 --- mandoc/roff.c 2013/10/05 22:19:10 1.182 +++ mandoc/roff.c 2014/02/14 22:27:41 1.192 @@ -1,7 +1,7 @@ -/* $Id: roff.c,v 1.182 2013/10/05 22:19:10 schwarze Exp $ */ +/* $Id: roff.c,v 1.192 2014/02/14 22:27:41 schwarze Exp $ */ /* * Copyright (c) 2010, 2011, 2012 Kristaps Dzonsons - * Copyright (c) 2010, 2011, 2012, 2013 Ingo Schwarze + * 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 @@ -46,6 +46,8 @@ enum rofft { ROFF_de1, ROFF_ds, ROFF_el, + ROFF_fam, + ROFF_hw, ROFF_hy, ROFF_ie, ROFF_if, @@ -74,8 +76,8 @@ enum rofft { }; enum roffrule { - ROFFRULE_ALLOW, - ROFFRULE_DENY + ROFFRULE_DENY, + ROFFRULE_ALLOW }; /* @@ -107,6 +109,7 @@ struct roffreg { struct roff { enum mparset parsetype; /* requested parse type */ struct mparse *parse; /* parse point */ + int quick; /* skip standard macro deletion */ struct roffnode *last; /* leaf of stack */ enum roffrule rstack[RSTACK_MAX]; /* stack of !`ie' rules */ char control; /* control character */ @@ -185,8 +188,11 @@ static void roff_free1(struct roff *); static void roff_freereg(struct roffreg *); static void roff_freestr(struct roffkv *); static char *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); @@ -233,6 +239,8 @@ static struct roffmac roffs[ROFF_MAX] = { { "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 }, @@ -441,14 +449,9 @@ roff_free1(struct roff *r) void roff_reset(struct roff *r) { - int i; roff_free1(r); - r->control = 0; - - for (i = 0; i < PREDEFS_MAX; i++) - roff_setstr(r, predefs[i].name, predefs[i].str, 0); } @@ -462,21 +465,18 @@ roff_free(struct roff *r) struct roff * -roff_alloc(enum mparset type, struct mparse *parse) +roff_alloc(enum mparset type, struct mparse *parse, int quick) { struct roff *r; - int i; r = mandoc_calloc(1, sizeof(struct roff)); r->parsetype = type; r->parse = parse; + r->quick = quick; r->rstackpos = -1; roffhash_init(); - for (i = 0; i < PREDEFS_MAX; i++) - roff_setstr(r, predefs[i].name, predefs[i].str, 0); - return(r); } @@ -640,8 +640,7 @@ roff_parsetext(char **bufp, size_t *szp, int pos, int if ('\\' == *p) { /* Skip over escapes. */ p++; - esc = mandoc_escape - ((const char const **)&p, NULL, NULL); + esc = mandoc_escape((const char **)&p, NULL, NULL); if (ESCAPE_ERROR == esc) break; continue; @@ -1125,9 +1124,61 @@ roff_cond_text(ROFF_ARGS) return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT); } +static int +roff_getnum(const char *v, int *pos, int *res) +{ + int p, n; + + 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; +} + +static int +roff_getop(const char *v, int *pos, char *res) +{ + int e; + + *res = v[*pos]; + e = v[*pos + 1] == '='; + + switch (*res) { + case '=': + break; + case '>': + if (e) + *res = 'g'; + break; + case '<': + if (e) + *res = 'l'; + break; + default: + return(0); + } + + *pos += 1 + e; + + return(*res); +} + static enum roffrule roff_evalcond(const char *v, int *pos) { + int not, lh, rh; + char op; switch (v[*pos]) { case ('n'): @@ -1140,13 +1191,47 @@ roff_evalcond(const char *v, int *pos) case ('t'): (*pos)++; return(ROFFRULE_DENY); + case ('!'): + (*pos)++; + not = 1; + break; default: + not = 0; break; } - while (v[*pos] && ' ' != v[*pos]) - (*pos)++; - return(ROFFRULE_DENY); + if (!roff_getnum(v, pos, &lh)) + return ROFFRULE_DENY; + if (!roff_getop(v, pos, &op)) { + if (lh < 0) + lh = 0; + goto out; + } + if (!roff_getnum(v, pos, &rh)) + return ROFFRULE_DENY; + switch (op) { + case 'g': + lh = lh >= rh; + break; + case 'l': + lh = lh <= rh; + break; + case '=': + lh = lh == rh; + break; + case '>': + lh = lh > rh; + break; + case '<': + lh = lh < rh; + break; + default: + return ROFFRULE_DENY; + } +out: + if (not) + lh = !lh; + return lh ? ROFFRULE_ALLOW : ROFFRULE_DENY; } /* ARGSUSED */ @@ -1268,7 +1353,7 @@ roff_ds(ROFF_ARGS) } void -roff_setreg(struct roff *r, const char *name, int val) +roff_setreg(struct roff *r, const char *name, int val, char sign) { struct roffreg *reg; @@ -1283,18 +1368,59 @@ roff_setreg(struct roff *r, const char *name, int val) 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; } - reg->val = val; + if ('+' == sign) + reg->val += val; + else if ('-' == sign) + reg->val -= val; + else + reg->val = val; } +/* + * 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); @@ -1306,7 +1432,14 @@ 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)) @@ -1334,15 +1467,22 @@ roff_nr(ROFF_ARGS) { const char *key; char *val; + size_t sz; int iv; + char sign; val = *bufp + pos; key = roff_getname(r, &val, ln, pos); - iv = mandoc_strntoi(val, strlen(val), 10); + sign = *val; + if ('+' == sign || '-' == sign) + val++; - roff_setreg(r, key, iv); + sz = strspn(val, "0123456789"); + iv = sz ? mandoc_strntoi(val, sz, 10) : 0; + roff_setreg(r, key, iv, sign); + return(ROFF_IGN); } @@ -1393,7 +1533,7 @@ roff_Dd(ROFF_ARGS) { const char *const *cp; - if (MPARSE_MDOC != r->parsetype) + if (0 == r->quick && MPARSE_MDOC != r->parsetype) for (cp = __mdoc_reserved; *cp; cp++) roff_setstr(r, *cp, NULL, 0); @@ -1406,7 +1546,7 @@ roff_TH(ROFF_ARGS) { const char *const *cp; - if (MPARSE_MDOC != r->parsetype) + if (0 == r->quick && MPARSE_MDOC != r->parsetype) for (cp = __man_reserved; *cp; cp++) roff_setstr(r, *cp, NULL, 0); @@ -1628,7 +1768,7 @@ 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++) @@ -1797,11 +1937,17 @@ 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]) 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); }