=================================================================== RCS file: /cvs/mandoc/roff.c,v retrieving revision 1.132 retrieving revision 1.150 diff -u -p -r1.132 -r1.150 --- mandoc/roff.c 2011/04/13 09:57:41 1.132 +++ mandoc/roff.c 2011/07/23 18:41:18 1.150 @@ -1,4 +1,4 @@ -/* $Id: roff.c,v 1.132 2011/04/13 09:57:41 kristaps Exp $ */ +/* $Id: roff.c,v 1.150 2011/07/23 18:41:18 kristaps Exp $ */ /* * Copyright (c) 2010, 2011 Kristaps Dzonsons * Copyright (c) 2010, 2011 Ingo Schwarze @@ -20,17 +20,15 @@ #endif #include -#include #include -#include #include #include -#include #include "mandoc.h" #include "libroff.h" #include "libmandoc.h" +/* Maximum number of nested if-else conditionals. */ #define RSTACK_MAX 128 enum rofft { @@ -63,7 +61,7 @@ enum rofft { ROFF_EQ, ROFF_EN, ROFF_cblock, - ROFF_ccond, /* FIXME: remove this. */ + ROFF_ccond, ROFF_USERDEF, ROFF_MAX }; @@ -73,6 +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 */ @@ -84,7 +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 */ @@ -127,6 +135,14 @@ struct roffmac { struct roffmac *next; }; +struct predef { + const char *name; /* predefined input name */ + const char *str; /* replacement symbol */ +}; + +#define PREDEF(__name, __str) \ + { (__name), (__str) }, + static enum rofferr roff_block(ROFF_ARGS); static enum rofferr roff_block_text(ROFF_ARGS); static enum rofferr roff_block_sub(ROFF_ARGS); @@ -144,7 +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); @@ -198,6 +214,12 @@ static struct roffmac roffs[ROFF_MAX] = { { NULL, roff_userdef, NULL, NULL, 0, NULL }, }; +/* Array of injected predefined strings. */ +#define PREDEFS_MAX 38 +static const struct predef predefs[PREDEFS_MAX] = { +#include "predefs.in" +}; + static void roff_free1(struct roff *); static enum rofft roff_hash_find(const char *, size_t); static void roff_hash_init(void); @@ -206,7 +228,6 @@ static void roffnode_push(struct roff *, enum rofft, const char *, int, int); static void roffnode_pop(struct roff *); static enum rofft roff_parse(struct roff *, const char *, int *); -static int roff_parse_nat(const char *, unsigned int *); /* See roff_hash_find() */ #define ROFF_HASH(p) (p[0] - ASCII_LO) @@ -232,7 +253,6 @@ roff_hash_init(void) } } - /* * Look up a roff token by its name. Returns ROFF_MAX if no macro by * the nil-terminated string name could be found. @@ -337,8 +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); } @@ -352,16 +378,20 @@ 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; roff_hash_init(); + + for (i = 0; i < PREDEFS_MAX; i++) + roff_setstr(r, predefs[i].name, predefs[i].str, 0); + return(r); } @@ -372,7 +402,7 @@ roff_alloc(struct regset *regs, struct mparse *parse) * is processed. */ 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) { const char *stesc; /* start of an escape sequence ('\\') */ const char *stnam; /* start of the name, after "[(*" */ @@ -439,8 +469,9 @@ 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; + /* TODO: keep track of the correct position. */ + mandoc_msg(MANDOCERR_BADESCAPE, r->parse, ln, pos, NULL); + res = ""; } /* Replace the escape sequence by the string. */ @@ -476,7 +507,7 @@ roff_parseln(struct roff *r, int ln, char **bufp, * words to fill in. */ - if (r->first_string && ! roff_res(r, bufp, szp, pos)) + if (r->first_string && ! roff_res(r, bufp, szp, ln, pos)) return(ROFF_REPARSE); ppos = pos; @@ -499,18 +530,18 @@ 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, @@ -552,7 +583,7 @@ roff_endparse(struct roff *r) if (r->eqn) { mandoc_msg(MANDOCERR_SCOPEEXIT, r->parse, - r->eqn->eqn.line, r->eqn->eqn.pos, NULL); + r->eqn->eqn.ln, r->eqn->eqn.pos, NULL); eqn_end(r->eqn); r->eqn = NULL; } @@ -576,11 +607,18 @@ 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); @@ -593,27 +631,6 @@ roff_parse(struct roff *r, const char *buf, int *pos) return(t); } - -static int -roff_parse_nat(const char *buf, unsigned int *res) -{ - char *ep; - long lval; - - errno = 0; - lval = strtol(buf, &ep, 10); - if (buf[0] == '\0' || *ep != '\0') - return(0); - if ((errno == ERANGE && - (lval == LONG_MAX || lval == LONG_MIN)) || - (lval > INT_MAX || lval < 0)) - return(0); - - *res = (unsigned int)lval; - return(1); -} - - /* ARGSUSED */ static enum rofferr roff_cblock(ROFF_ARGS) @@ -829,8 +846,7 @@ roff_block_sub(ROFF_ARGS) * pulling it out of the hashtable. */ - if (ROFF_MAX == (t = roff_parse(r, *bufp, &pos))) - return(ROFF_IGN); + t = roff_parse(r, *bufp, &pos); /* * Macros other than block-end are only significant @@ -866,21 +882,44 @@ roff_cond_sub(ROFF_ARGS) { enum rofft t; enum roffrule rr; + char *ep; rr = r->last->rule; + roffnode_cleanscope(r); - /* - * Clean out scope. If we've closed ourselves, then don't - * continue. + /* + * 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. */ - roffnode_cleanscope(r); - if (ROFF_MAX == (t = roff_parse(r, *bufp, &pos))) { - if ('\\' == (*bufp)[pos] && '}' == (*bufp)[pos + 1]) - return(roff_ccond - (r, ROFF_ccond, bufp, szp, - ln, pos, pos + 2, offs)); + 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); } @@ -889,6 +928,7 @@ roff_cond_sub(ROFF_ARGS) * if they're either structurally required (such as loops and * conditionals) or a closing macro. */ + if (ROFFRULE_DENY == rr) if ( ! (ROFFMAC_STRUCT & roffs[t].flags)) if (ROFF_ccond != t) @@ -899,37 +939,28 @@ roff_cond_sub(ROFF_ARGS) ln, ppos, pos, offs)); } - /* ARGSUSED */ static enum rofferr roff_cond_text(ROFF_ARGS) { - char *ep, *st; + char *ep; enum roffrule rr; rr = r->last->rule; + roffnode_cleanscope(r); - /* - * We display the value of the text if out current evaluation - * scope permits us to do so. - */ - - /* FIXME: use roff_ccond? */ - - st = &(*bufp)[pos]; - if (NULL == (ep = strstr(st, "\\}"))) { - roffnode_cleanscope(r); - return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT); + 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); } - - if (ep == st || (ep > st && '\\' != *(ep - 1))) - roffnode_pop(r); - - roffnode_cleanscope(r); return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT); } - static enum roffrule roff_evalcond(const char *v, int *pos) { @@ -1084,23 +1115,44 @@ 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) { const char *key; char *val; - struct reg *rg; + int iv; 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 ( ! roff_parse_nat(val, &rg[(int)REG_nS].v.u)) - rg[(int)REG_nS].v.u = 0; + 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; } return(ROFF_IGN); @@ -1156,7 +1208,7 @@ roff_EQ(ROFF_ARGS) struct eqn_node *e; assert(NULL == r->eqn); - e = eqn_alloc(ppos, ln); + e = eqn_alloc(*bufp + pos, ppos, ln, r->parse); if (r->last_eqn) r->last_eqn->next = e;