=================================================================== RCS file: /cvs/mandoc/roff.c,v retrieving revision 1.141 retrieving revision 1.153 diff -u -p -r1.141 -r1.153 --- mandoc/roff.c 2011/05/24 21:18:06 1.141 +++ mandoc/roff.c 2011/07/26 14:24:06 1.153 @@ -1,4 +1,4 @@ -/* $Id: roff.c,v 1.141 2011/05/24 21:18:06 kristaps Exp $ */ +/* $Id: roff.c,v 1.153 2011/07/26 14:24:06 kristaps Exp $ */ /* * Copyright (c) 2010, 2011 Kristaps Dzonsons * Copyright (c) 2010, 2011 Ingo Schwarze @@ -71,6 +71,16 @@ enum roffrule { 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. + */ +struct reg { + int set; /* whether set or not */ + unsigned int u; /* unsigned integer */ +}; + struct roffstr { char *name; /* key of symbol */ char *string; /* current value */ @@ -82,7 +92,7 @@ struct roff { struct roffnode *last; /* leaf of stack */ enum roffrule rstack[RSTACK_MAX]; /* stack of !`ie' rules */ int rstackpos; /* position in rstack */ - struct regset *regs; /* read/writable registers */ + struct reg regs[REG__MAX]; struct roffstr *first_string; /* user-defined strings & macros */ const char *current_string; /* value of last called user macro */ struct tbl_node *first_tbl; /* first table parsed */ @@ -150,7 +160,7 @@ static const char *roff_getstrn(const struct roff *, static enum rofferr roff_line_ignore(ROFF_ARGS); static enum rofferr roff_nr(ROFF_ARGS); static int roff_res(struct roff *, - char **, size_t *, int); + char **, size_t *, int, int); static enum rofferr roff_rm(ROFF_ARGS); static void roff_setstr(struct roff *, const char *, const char *, int); @@ -347,8 +357,14 @@ roff_free1(struct roff *r) 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); } @@ -362,13 +378,12 @@ roff_free(struct roff *r) struct roff * -roff_alloc(struct regset *regs, struct mparse *parse) +roff_alloc(struct mparse *parse) { struct roff *r; int i; r = mandoc_calloc(1, sizeof(struct roff)); - r->regs = regs; r->parse = parse; r->rstackpos = -1; @@ -380,15 +395,16 @@ roff_alloc(struct regset *regs, struct mparse *parse) 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. +*/ static int -roff_res(struct roff *r, char **bufp, size_t *szp, int pos) +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 ('\\') */ const char *stnam; /* start of the name, after "[(*" */ const char *cp; /* end of the name, e.g. before ']' */ @@ -411,9 +427,21 @@ roff_res(struct roff *r, char **bufp, size_t *szp, int if ('\0' == *cp) return(1); - if ('*' != *cp++) + + 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); continue; + } + cp++; + /* * The third character decides the length * of the name of the string. @@ -440,8 +468,13 @@ roff_res(struct roff *r, char **bufp, size_t *szp, int /* Advance to the end of the name. */ for (i = 0; 0 == maxl || i < maxl; i++, cp++) { - if ('\0' == *cp) - return(1); /* Error. */ + if ('\0' == *cp) { + mandoc_msg + (MANDOCERR_BADESCAPE, + r->parse, ln, + (int)(stesc - *bufp), NULL); + return(1); + } if (0 == maxl && ']' == *cp) break; } @@ -454,8 +487,10 @@ roff_res(struct roff *r, char **bufp, size_t *szp, int res = roff_getstrn(r, stnam, (size_t)i); if (NULL == res) { - cp -= maxl ? 1 : 0; - continue; + mandoc_msg + (MANDOCERR_BADESCAPE, r->parse, + ln, (int)(stesc - *bufp), NULL); + res = ""; } /* Replace the escape sequence by the string. */ @@ -477,7 +512,6 @@ roff_res(struct roff *r, char **bufp, size_t *szp, int return(1); } - enum rofferr roff_parseln(struct roff *r, int ln, char **bufp, size_t *szp, int pos, int *offs) @@ -491,7 +525,7 @@ roff_parseln(struct roff *r, int ln, char **bufp, * words to fill in. */ - if (r->first_string && ! roff_res(r, bufp, szp, pos)) + if ( ! roff_res(r, bufp, szp, ln, pos)) return(ROFF_REPARSE); ppos = pos; @@ -514,18 +548,18 @@ roff_parseln(struct roff *r, int ln, char **bufp, if (ROFF_CONT != e) return(e); if (r->eqn) - return(eqn_read(&r->eqn, ln, *bufp, pos)); + return(eqn_read(&r->eqn, ln, *bufp, pos, offs)); if (r->tbl) return(tbl_read(r->tbl, ln, *bufp, pos)); return(ROFF_CONT); } else if ( ! ctl) { if (r->eqn) - return(eqn_read(&r->eqn, ln, *bufp, pos)); + return(eqn_read(&r->eqn, ln, *bufp, pos, offs)); if (r->tbl) return(tbl_read(r->tbl, ln, *bufp, pos)); return(ROFF_CONT); } else if (r->eqn) - return(eqn_read(&r->eqn, ln, *bufp, ppos)); + return(eqn_read(&r->eqn, ln, *bufp, ppos, offs)); /* * If a scope is open, go to the child handler for that macro, @@ -567,16 +601,14 @@ roff_endparse(struct roff *r) if (r->eqn) { mandoc_msg(MANDOCERR_SCOPEEXIT, r->parse, - r->eqn->eqn.line, r->eqn->eqn.pos, NULL); - eqn_end(r->eqn); - r->eqn = NULL; + 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); - tbl_end(r->tbl); - r->tbl = NULL; + tbl_end(&r->tbl); } } @@ -591,11 +623,18 @@ roff_parse(struct roff *r, const char *buf, int *pos) size_t maclen; enum rofft t; - if ('\0' == buf[*pos] || '"' == buf[*pos]) + if ('\0' == buf[*pos] || '"' == buf[*pos] || + '\t' == buf[*pos] || ' ' == buf[*pos]) 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 = buf + *pos; - maclen = strcspn(mac, " \\\t\0"); + maclen = strcspn(mac + 1, " \\\t\0") + 1; t = (r->current_string = roff_getstrn(r, mac, maclen)) ? ROFF_USERDEF : roff_hash_find(mac, maclen); @@ -877,7 +916,22 @@ roff_cond_sub(ROFF_ARGS) ep++; if ('}' != *ep) continue; - *ep = '&'; + + /* + * 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; @@ -1077,7 +1131,27 @@ roff_ds(ROFF_ARGS) return(ROFF_IGN); } +int +roff_regisset(const struct roff *r, enum regs reg) +{ + return(r->regs[(int)reg].set); +} + +unsigned int +roff_regget(const struct roff *r, enum regs reg) +{ + + return(r->regs[(int)reg].u); +} + +void +roff_regunset(struct roff *r, enum regs reg) +{ + + r->regs[(int)reg].set = 0; +} + /* ARGSUSED */ static enum rofferr roff_nr(ROFF_ARGS) @@ -1085,18 +1159,16 @@ roff_nr(ROFF_ARGS) const char *key; char *val; int iv; - struct reg *rg; val = *bufp + pos; key = roff_getname(r, &val, ln, pos); - rg = r->regs->regs; if (0 == strcmp(key, "nS")) { - rg[(int)REG_nS].set = 1; - if ((iv = mandoc_strntou(val, strlen(val), 10)) >= 0) - rg[REG_nS].v.u = (unsigned)iv; + 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 - rg[(int)REG_nS].v.u = 0u; + r->regs[(int)REG_nS].u = 0u; } return(ROFF_IGN); @@ -1126,9 +1198,8 @@ roff_TE(ROFF_ARGS) if (NULL == r->tbl) mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL); else - tbl_end(r->tbl); + tbl_end(&r->tbl); - r->tbl = NULL; return(ROFF_IGN); } @@ -1145,14 +1216,22 @@ roff_T_(ROFF_ARGS) return(ROFF_IGN); } -/* ARGSUSED */ -static enum rofferr -roff_EQ(ROFF_ARGS) +int +roff_closeeqn(struct roff *r) { - struct eqn_node *e; + return(r->eqn && ROFF_EQN == eqn_end(&r->eqn) ? 1 : 0); +} + +void +roff_openeqn(struct roff *r, const char *name, int line, + int offs, const char *buf) +{ + struct eqn_node *e; + int poff; + assert(NULL == r->eqn); - e = eqn_alloc(ppos, ln); + e = eqn_alloc(name, offs, line, r->parse); if (r->last_eqn) r->last_eqn->next = e; @@ -1160,6 +1239,19 @@ roff_EQ(ROFF_ARGS) r->first_eqn = r->last_eqn = e; r->eqn = r->last_eqn = e; + + if (buf) { + poff = 0; + eqn_read(&r->eqn, line, buf, offs, &poff); + } +} + +/* ARGSUSED */ +static enum rofferr +roff_EQ(ROFF_ARGS) +{ + + roff_openeqn(r, *bufp + pos, ln, ppos, NULL); return(ROFF_IGN); } @@ -1180,7 +1272,7 @@ roff_TS(ROFF_ARGS) if (r->tbl) { mandoc_msg(MANDOCERR_SCOPEBROKEN, r->parse, ln, ppos, NULL); - tbl_end(r->tbl); + tbl_end(&r->tbl); } t = tbl_alloc(ppos, ln, r->parse); @@ -1415,4 +1507,11 @@ roff_eqn(const struct roff *r) { return(r->last_eqn ? &r->last_eqn->eqn : NULL); +} + +char +roff_eqndelim(const struct roff *r) +{ + + return('\0'); }