-/* $Id: roff.c,v 1.118 2011/01/02 10:10:57 kristaps Exp $ */
+/* $Id: roff.c,v 1.172 2011/10/24 21:41:45 schwarze Exp $ */
/*
- * Copyright (c) 2010 Kristaps Dzonsons <kristaps@bsd.lv>
- * Copyright (c) 2010 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2010, 2011 Ingo Schwarze <schwarze@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
#endif
#include <assert.h>
-#include <errno.h>
#include <ctype.h>
-#include <limits.h>
#include <stdlib.h>
#include <string.h>
-#include <stdio.h>
#include "mandoc.h"
-#include "roff.h"
#include "libroff.h"
#include "libmandoc.h"
+/* Maximum number of nested if-else conditionals. */
#define RSTACK_MAX 128
-#define ROFF_CTL(c) \
- ('.' == (c) || '\'' == (c))
+/* Maximum number of string expansions per line, to break infinite loops. */
+#define EXPAND_LIMIT 1000
enum rofft {
ROFF_ad,
ROFF_ie,
ROFF_if,
ROFF_ig,
+ ROFF_it,
ROFF_ne,
ROFF_nh,
ROFF_nr,
+ ROFF_ns,
+ ROFF_ps,
ROFF_rm,
ROFF_so,
+ ROFF_ta,
ROFF_tr,
ROFF_TS,
ROFF_TE,
ROFF_T_,
+ ROFF_EQ,
+ ROFF_EN,
ROFF_cblock,
- ROFF_ccond, /* FIXME: remove this. */
+ ROFF_ccond,
ROFF_USERDEF,
ROFF_MAX
};
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 */
+};
+
+/*
+ * An incredibly-simple string buffer.
+ */
struct roffstr {
- char *name; /* key of symbol */
- char *string; /* current value */
- struct roffstr *next; /* next in list */
+ char *p; /* nil-terminated buffer */
+ size_t sz; /* saved strlen(p) */
+};
+
+/*
+ * A key-value roffstr pair as part of a singly-linked list.
+ */
+struct roffkv {
+ struct roffstr key;
+ struct roffstr val;
+ struct roffkv *next; /* next in list */
};
struct roff {
+ struct mparse *parse; /* parse point */
struct roffnode *last; /* leaf of stack */
- mandocmsg msg; /* err/warn/fatal messages */
- void *data; /* privdata for messages */
enum roffrule rstack[RSTACK_MAX]; /* stack of !`ie' rules */
int rstackpos; /* position in rstack */
- struct regset *regs; /* read/writable registers */
- struct roffstr *first_string; /* user-defined strings & macros */
+ struct reg regs[REG__MAX];
+ struct roffkv *strtab; /* user-defined strings & macros */
+ 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 */
struct tbl_node *tbl; /* current table being parsed */
+ struct eqn_node *last_eqn; /* last equation parsed */
+ struct eqn_node *first_eqn; /* first equation parsed */
+ struct eqn_node *eqn; /* current equation being parsed */
};
struct roffnode {
struct roffmac *next;
};
+struct predef {
+ const char *name; /* predefined input name */
+ const char *str; /* replacement symbol */
+};
+
+#define PREDEF(__name, __str) \
+ { (__name), (__str) },
+
+static enum rofft roffhash_find(const char *, size_t);
+static void roffhash_init(void);
+static void roffnode_cleanscope(struct roff *);
+static void roffnode_pop(struct roff *);
+static void roffnode_push(struct roff *, enum rofft,
+ const char *, int, int);
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_cond_sub(ROFF_ARGS);
static enum rofferr roff_ds(ROFF_ARGS);
static enum roffrule roff_evalcond(const char *, int *);
-static void roff_freestr(struct roff *);
+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 *,
const char *, size_t);
static enum rofferr roff_line_ignore(ROFF_ARGS);
-static enum rofferr roff_line_error(ROFF_ARGS);
static enum rofferr roff_nr(ROFF_ARGS);
-static int roff_res(struct roff *,
- char **, size_t *, int);
+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 enum rofferr roff_res(struct roff *,
+ char **, size_t *, int, int);
+static enum rofferr roff_rm(ROFF_ARGS);
static void roff_setstr(struct roff *,
const char *, const char *, int);
+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_TE(ROFF_ARGS);
static enum rofferr roff_TS(ROFF_ARGS);
+static enum rofferr roff_EQ(ROFF_ARGS);
+static enum rofferr roff_EN(ROFF_ARGS);
static enum rofferr roff_T_(ROFF_ARGS);
static enum rofferr roff_userdef(ROFF_ARGS);
-/* See roff_hash_find() */
+/* See roffhash_find() */
#define ASCII_HI 126
#define ASCII_LO 33
{ "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 },
{ "ne", roff_line_ignore, NULL, NULL, 0, NULL },
{ "nh", roff_line_ignore, NULL, NULL, 0, NULL },
{ "nr", roff_nr, NULL, NULL, 0, NULL },
- { "rm", roff_line_error, 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 },
{ "so", roff_so, NULL, NULL, 0, NULL },
- { "tr", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "ta", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "tr", roff_tr, 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 },
};
-static void roff_free1(struct roff *);
-static enum rofft roff_hash_find(const char *, size_t);
-static void roff_hash_init(void);
-static void roffnode_cleanscope(struct roff *);
-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 *);
+/* Array of injected predefined strings. */
+#define PREDEFS_MAX 38
+static const struct predef predefs[PREDEFS_MAX] = {
+#include "predefs.in"
+};
-/* See roff_hash_find() */
+/* See roffhash_find() */
#define ROFF_HASH(p) (p[0] - ASCII_LO)
static void
-roff_hash_init(void)
+roffhash_init(void)
{
struct roffmac *n;
int buc, i;
}
}
-
/*
* Look up a roff token by its name. Returns ROFF_MAX if no macro by
* the nil-terminated string name could be found.
*/
static enum rofft
-roff_hash_find(const char *p, size_t s)
+roffhash_find(const char *p, size_t s)
{
int buc;
struct roffmac *n;
assert(r->last);
p = r->last;
- if (ROFF_el == p->tok)
- if (r->rstackpos > -1)
- r->rstackpos--;
-
r->last = r->last->parent;
free(p->name);
free(p->end);
roff_free1(struct roff *r)
{
struct tbl_node *t;
+ struct eqn_node *e;
+ int i;
- while (r->first_tbl) {
- t = r->first_tbl;
+ while (NULL != (t = r->first_tbl)) {
r->first_tbl = t->next;
tbl_free(t);
}
r->first_tbl = r->last_tbl = r->tbl = NULL;
+ while (NULL != (e = r->first_eqn)) {
+ r->first_eqn = e->next;
+ eqn_free(e);
+ }
+
+ r->first_eqn = r->last_eqn = r->eqn = NULL;
+
while (r->last)
roffnode_pop(r);
- roff_freestr(r);
-}
+ roff_freestr(r->strtab);
+ roff_freestr(r->xmbtab);
+
+ r->strtab = r->xmbtab = 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);
}
struct roff *
-roff_alloc(struct regset *regs, void *data, const mandocmsg msg)
+roff_alloc(struct mparse *parse)
{
struct roff *r;
+ int i;
r = mandoc_calloc(1, sizeof(struct roff));
- r->regs = regs;
- r->msg = msg;
- r->data = data;
+ r->parse = parse;
r->rstackpos = -1;
- roff_hash_init();
+ 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.
*/
-static int
-roff_res(struct roff *r, char **bufp, size_t *szp, int pos)
+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 ('\\') */
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;
+ int i, maxl, expand_count;
size_t nsz;
char *n;
- /* Search for a leading backslash and save a pointer to it. */
+ expand_count = 0;
+again:
cp = *bufp + pos;
while (NULL != (cp = strchr(cp, '\\'))) {
stesc = cp++;
*/
if ('\0' == *cp)
- return(1);
- if ('*' != *cp++)
- continue;
+ return(ROFF_CONT);
+
+ 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(ROFF_CONT);
+ }
+
+ cp++;
/*
* The third character decides the length
switch (*cp) {
case ('\0'):
- return(1);
+ return(ROFF_CONT);
case ('('):
cp++;
maxl = 2;
/* 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(ROFF_CONT);
+ }
if (0 == maxl && ']' == *cp)
break;
}
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. */
+ pos = stesc - *bufp;
+
nsz = *szp + strlen(res) + 1;
n = mandoc_malloc(nsz);
*bufp = n;
*szp = nsz;
- return(0);
- }
- return(1);
+ if (EXPAND_LIMIT >= ++expand_count)
+ goto again;
+
+ /* Just leave the string unexpanded. */
+ mandoc_msg(MANDOCERR_ROFFLOOP, r->parse, ln, pos, NULL);
+ return(ROFF_IGN);
+ }
+ return(ROFF_CONT);
}
+/*
+ * Process text streams: convert all breakable hyphens into ASCII_HYPH.
+ */
+static enum rofferr
+roff_parsetext(char *p)
+{
+ size_t sz;
+ const char *start;
+ enum mandoc_esc esc;
+
+ start = p;
+
+ while ('\0' != *p) {
+ sz = strcspn(p, "-\\");
+ p += sz;
+
+ if ('\0' == *p)
+ break;
+
+ if ('\\' == *p) {
+ /* Skip over escapes. */
+ p++;
+ esc = mandoc_escape
+ ((const char **)&p, NULL, NULL);
+ if (ESCAPE_ERROR == esc)
+ break;
+ continue;
+ } else if (p == start) {
+ p++;
+ continue;
+ }
+
+ if (isalpha((unsigned char)p[-1]) &&
+ isalpha((unsigned char)p[1]))
+ *p = ASCII_HYPH;
+ p++;
+ }
+
+ return(ROFF_CONT);
+}
enum rofferr
roff_parseln(struct roff *r, int ln, char **bufp,
{
enum rofft t;
enum rofferr e;
- int ppos;
+ int ppos, ctl;
/*
* Run the reserved-word filter only if we have some reserved
* words to fill in.
*/
- if (r->first_string && ! roff_res(r, bufp, szp, pos))
- return(ROFF_REPARSE);
+ 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);
/*
* First, if a scope is open and we're not a macro, pass the
* text through the macro's filter. If a scope isn't open and
* we're not a macro, just let it through.
+ * Finally, if there's an equation scope open, divert it into it
+ * no matter our state.
*/
- if (r->last && ! ROFF_CTL((*bufp)[pos])) {
+ if (r->last && ! ctl) {
t = r->last->tok;
assert(roffs[t].text);
e = (*roffs[t].text)
(r, t, bufp, szp, ln, pos, pos, offs);
assert(ROFF_IGN == e || ROFF_CONT == e);
- if (ROFF_CONT == e && r->tbl)
- return(tbl_read(r->tbl, ln, *bufp, *offs));
- return(e);
- } else if ( ! ROFF_CTL((*bufp)[pos])) {
+ if (ROFF_CONT != e)
+ return(e);
+ if (r->eqn)
+ return(eqn_read(&r->eqn, ln, *bufp, pos, offs));
if (r->tbl)
- return(tbl_read(r->tbl, ln, *bufp, *offs));
- return(ROFF_CONT);
- }
+ 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));
/*
* If a scope is open, go to the child handler for that macro,
* as it may want to preprocess before doing anything with it.
+ * Don't do so if an equation is open.
*/
if (r->last) {
assert(roffs[t].sub);
return((*roffs[t].sub)
(r, t, bufp, szp,
- ln, pos, pos, offs));
+ ln, ppos, pos, offs));
}
/*
* the compilers handle it.
*/
- ppos = pos;
if (ROFF_MAX == (t = roff_parse(r, *bufp, &pos)))
return(ROFF_CONT);
{
if (r->last)
- (*r->msg)(MANDOCERR_SCOPEEXIT, r->data,
+ mandoc_msg(MANDOCERR_SCOPEEXIT, r->parse,
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);
+ eqn_end(&r->eqn);
+ }
+
if (r->tbl) {
- (*r->msg)(MANDOCERR_SCOPEEXIT, r->data,
+ mandoc_msg(MANDOCERR_SCOPEEXIT, r->parse,
r->tbl->line, r->tbl->pos, NULL);
- tbl_end(r->tbl);
- r->tbl = NULL;
+ tbl_end(&r->tbl);
}
}
-
/*
* Parse a roff node's type from the input buffer. This must be in the
* form of ".foo xxx" in the usual way.
size_t maclen;
enum rofft t;
- assert(ROFF_CTL(buf[*pos]));
- (*pos)++;
-
- while (' ' == buf[*pos] || '\t' == buf[*pos])
- (*pos)++;
-
- if ('\0' == 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);
+ ? ROFF_USERDEF : roffhash_find(mac, maclen);
+
+ *pos += (int)maclen;
- *pos += maclen;
while (buf[*pos] && ' ' == buf[*pos])
(*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)
*/
if (NULL == r->last) {
- (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL);
+ mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
return(ROFF_IGN);
}
case (ROFF_ig):
break;
default:
- (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL);
+ mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
return(ROFF_IGN);
}
if ((*bufp)[pos])
- (*r->msg)(MANDOCERR_ARGSLOST, r->data, ln, pos, NULL);
+ mandoc_msg(MANDOCERR_ARGSLOST, r->parse, ln, pos, NULL);
roffnode_pop(r);
roffnode_cleanscope(r);
{
if (NULL == r->last) {
- (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL);
+ mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
return(ROFF_IGN);
}
case (ROFF_if):
break;
default:
- (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL);
+ mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
return(ROFF_IGN);
}
if (r->last->endspan > -1) {
- (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL);
+ mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
return(ROFF_IGN);
}
if ((*bufp)[pos])
- (*r->msg)(MANDOCERR_ARGSLOST, r->data, ln, pos, NULL);
+ mandoc_msg(MANDOCERR_ARGSLOST, r->parse, ln, pos, NULL);
roffnode_pop(r);
roffnode_cleanscope(r);
if (ROFF_ig != tok) {
if ('\0' == (*bufp)[pos]) {
- (*r->msg)(MANDOCERR_NOARGS, r->data, ln, ppos, NULL);
+ mandoc_msg(MANDOCERR_NOARGS, r->parse, ln, ppos, NULL);
return(ROFF_IGN);
}
if (ROFF_de == tok)
name = *bufp + pos;
else
- (*r->msg)(MANDOCERR_REQUEST, r->data, ln, ppos,
+ mandoc_msg(MANDOCERR_REQUEST, r->parse, ln, ppos,
roffs[tok].name);
- while ((*bufp)[pos] && ' ' != (*bufp)[pos])
+ while ((*bufp)[pos] && ! isspace((unsigned char)(*bufp)[pos]))
pos++;
- while (' ' == (*bufp)[pos])
+ while (isspace((unsigned char)(*bufp)[pos]))
(*bufp)[pos++] = '\0';
}
/* If present, process the custom end-of-line marker. */
sv = pos;
- while ((*bufp)[pos] &&
- ' ' != (*bufp)[pos] &&
- '\t' != (*bufp)[pos])
+ while ((*bufp)[pos] && ! isspace((unsigned char)(*bufp)[pos]))
pos++;
/*
r->last->end[(int)sz] = '\0';
if ((*bufp)[pos])
- (*r->msg)(MANDOCERR_ARGSLOST, r->data, ln, pos, NULL);
+ mandoc_msg(MANDOCERR_ARGSLOST, r->parse, ln, pos, NULL);
return(ROFF_IGN);
}
*/
if (r->last->end) {
- i = pos + 1;
- while (' ' == (*bufp)[i] || '\t' == (*bufp)[i])
- i++;
-
- for (j = 0; r->last->end[j]; j++, i++)
+ for (i = pos, j = 0; r->last->end[j]; j++, i++)
if ((*bufp)[i] != r->last->end[j])
break;
roffnode_pop(r);
roffnode_cleanscope(r);
+ while (' ' == (*bufp)[i] || '\t' == (*bufp)[i])
+ i++;
+
+ pos = i;
if (ROFF_MAX != roff_parse(r, *bufp, &pos))
return(ROFF_RERUN);
return(ROFF_IGN);
* pulling it out of the hashtable.
*/
- ppos = pos;
t = roff_parse(r, *bufp, &pos);
/*
{
enum rofft t;
enum roffrule rr;
+ char *ep;
- ppos = pos;
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);
}
* 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)
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)
{
roff_line_ignore(ROFF_ARGS)
{
- return(ROFF_IGN);
-}
-
-/* ARGSUSED */
-static enum rofferr
-roff_line_error(ROFF_ARGS)
-{
+ if (ROFF_it == tok)
+ mandoc_msg(MANDOCERR_REQUEST, r->parse, ln, ppos, "it");
- (*r->msg)(MANDOCERR_REQUEST, r->data, ln, ppos, roffs[tok].name);
return(ROFF_IGN);
}
int sv;
enum roffrule rule;
- /* Stack overflow! */
-
- if (ROFF_ie == tok && r->rstackpos == RSTACK_MAX - 1) {
- (*r->msg)(MANDOCERR_MEM, r->data, ln, ppos, NULL);
- return(ROFF_ERR);
- }
+ /*
+ * 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.
+ *
+ * If we're not an `el', however, then evaluate the conditional.
+ */
- /* First, evaluate the conditional. */
-
- if (ROFF_el == tok) {
- /*
- * An `.el' will get the value of the current rstack
- * entry set in prior `ie' calls or defaults to DENY.
- */
- if (r->rstackpos < 0)
- rule = ROFFRULE_DENY;
- else
- rule = r->rstack[r->rstackpos];
- } else
- rule = roff_evalcond(*bufp, &pos);
+ rule = ROFF_el == tok ?
+ (r->rstackpos < 0 ?
+ ROFFRULE_DENY : r->rstack[r->rstackpos--]) :
+ roff_evalcond(*bufp, &pos);
sv = pos;
-
while (' ' == (*bufp)[pos])
pos++;
*/
if ('\0' == (*bufp)[pos] && sv != pos) {
- (*r->msg)(MANDOCERR_NOARGS, r->data, ln, ppos, NULL);
+ mandoc_msg(MANDOCERR_NOARGS, r->parse, ln, ppos, NULL);
return(ROFF_IGN);
}
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) {
- /*
- * An if-else will put the NEGATION of the current
- * evaluated conditional into the stack.
- */
- r->rstackpos++;
- if (ROFFRULE_DENY == r->last->rule)
- r->rstack[r->rstackpos] = ROFFRULE_ALLOW;
- else
- r->rstack[r->rstackpos] = ROFFRULE_DENY;
+ if (r->rstackpos == RSTACK_MAX - 1) {
+ 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;
}
/* If the parent has false as its rule, then so do we. */
* will have `bar " ' as its value.
*/
- name = *bufp + pos;
+ string = *bufp + pos;
+ name = roff_getname(r, &string, ln, pos);
if ('\0' == *name)
return(ROFF_IGN);
- string = name;
- /* Read until end of name. */
- while (*string && ' ' != *string)
- string++;
-
- /* Nil-terminate name. */
- if (*string)
- *(string++) = '\0';
-
- /* Read past spaces. */
- while (*string && ' ' == *string)
- string++;
-
- /* Read passed initial double-quote. */
- if (*string && '"' == *string)
+ /* Read past initial double-quote. */
+ if ('"' == *string)
string++;
/* The rest is the value. */
return(ROFF_IGN);
}
-
-/* ARGSUSED */
-static enum rofferr
-roff_nr(ROFF_ARGS)
+int
+roff_regisset(const struct roff *r, enum regs reg)
{
- const char *key, *val;
- struct reg *rg;
- key = &(*bufp)[pos];
- rg = r->regs->regs;
+ return(r->regs[(int)reg].set);
+}
- /* Parse register request. */
- while ((*bufp)[pos] && ' ' != (*bufp)[pos])
- pos++;
+unsigned int
+roff_regget(const struct roff *r, enum regs reg)
+{
- /*
- * Set our nil terminator. Because this line is going to be
- * ignored anyway, we can munge it as we please.
- */
- if ((*bufp)[pos])
- (*bufp)[pos++] = '\0';
+ return(r->regs[(int)reg].u);
+}
- /* Skip whitespace to register token. */
- while ((*bufp)[pos] && ' ' == (*bufp)[pos])
- pos++;
+void
+roff_regunset(struct roff *r, enum regs reg)
+{
+
+ r->regs[(int)reg].set = 0;
+}
- val = &(*bufp)[pos];
+/* ARGSUSED */
+static enum rofferr
+roff_nr(ROFF_ARGS)
+{
+ const char *key;
+ char *val;
+ int iv;
- /* Process register token. */
+ val = *bufp + pos;
+ key = roff_getname(r, &val, ln, pos);
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);
}
+/* ARGSUSED */
+static enum rofferr
+roff_rm(ROFF_ARGS)
+{
+ const char *name;
+ char *cp;
+
+ cp = *bufp + pos;
+ while ('\0' != *cp) {
+ name = roff_getname(r, &cp, ln, (int)(cp - *bufp));
+ if ('\0' != *name)
+ roff_setstr(r, name, NULL, 0);
+ }
+ return(ROFF_IGN);
+}
+
/* ARGSUSED */
static enum rofferr
roff_TE(ROFF_ARGS)
{
if (NULL == r->tbl)
- (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL);
+ mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
else
- tbl_end(r->tbl);
+ tbl_end(&r->tbl);
- r->tbl = NULL;
return(ROFF_IGN);
}
{
if (NULL == r->tbl)
- (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL);
+ mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
else
tbl_restart(ppos, ln, r->tbl);
return(ROFF_IGN);
}
+#if 0
+static int
+roff_closeeqn(struct roff *r)
+{
+
+ return(r->eqn && ROFF_EQN == eqn_end(&r->eqn) ? 1 : 0);
+}
+#endif
+
+static 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(name, offs, line, r->parse);
+
+ if (r->last_eqn)
+ r->last_eqn->next = e;
+ else
+ 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);
+}
+
+/* ARGSUSED */
+static enum rofferr
+roff_EN(ROFF_ARGS)
+{
+
+ mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
+ return(ROFF_IGN);
+}
+
/* ARGSUSED */
static enum rofferr
roff_TS(ROFF_ARGS)
struct tbl_node *t;
if (r->tbl) {
- (*r->msg)(MANDOCERR_SCOPEBROKEN, r->data, ln, ppos, NULL);
- tbl_end(r->tbl);
+ mandoc_msg(MANDOCERR_SCOPEBROKEN, r->parse, ln, ppos, NULL);
+ tbl_end(&r->tbl);
}
- t = tbl_alloc(ppos, ln, r->data, r->msg);
+ t = tbl_alloc(ppos, ln, r->parse);
if (r->last_tbl)
r->last_tbl->next = t;
return(ROFF_IGN);
}
+/* ARGSUSED */
+static enum rofferr
+roff_tr(ROFF_ARGS)
+{
+ const char *p, *first, *second;
+ size_t fsz, ssz;
+ enum mandoc_esc esc;
+
+ p = *bufp + pos;
+
+ if ('\0' == *p) {
+ mandoc_msg(MANDOCERR_ARGCOUNT, r->parse, ln, ppos, NULL);
+ return(ROFF_IGN);
+ }
+
+ while ('\0' != *p) {
+ fsz = ssz = 1;
+
+ first = p++;
+ if ('\\' == *first) {
+ esc = mandoc_escape(&p, NULL, NULL);
+ if (ESCAPE_ERROR == esc) {
+ mandoc_msg
+ (MANDOCERR_BADESCAPE, r->parse,
+ ln, (int)(p - *bufp), NULL);
+ return(ROFF_IGN);
+ }
+ fsz = (size_t)(p - first);
+ }
+
+ second = p++;
+ if ('\\' == *second) {
+ esc = mandoc_escape(&p, NULL, NULL);
+ if (ESCAPE_ERROR == esc) {
+ 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);
+ second = " ";
+ p--;
+ }
+
+ 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;
- (*r->msg)(MANDOCERR_SO, r->data, ln, ppos, NULL);
+ mandoc_msg(MANDOCERR_SO, r->parse, ln, ppos, NULL);
/*
* Handle `so'. Be EXTREMELY careful, as we shouldn't be
name = *bufp + pos;
if ('/' == *name || strstr(name, "../") || strstr(name, "/..")) {
- (*r->msg)(MANDOCERR_SOPATH, r->data, ln, pos, NULL);
+ mandoc_msg(MANDOCERR_SOPATH, r->parse, ln, pos, NULL);
return(ROFF_ERR);
}
{
const char *arg[9];
char *cp, *n1, *n2;
- int i, quoted, pairs;
+ int i;
/*
* Collect pointers to macro argument strings
* and null-terminate them.
*/
cp = *bufp + pos;
- for (i = 0; i < 9; i++) {
- /* Quoting can only start with a new word. */
- if ('"' == *cp) {
- quoted = 1;
- cp++;
- } else
- quoted = 0;
- arg[i] = cp;
- for (pairs = 0; '\0' != *cp; cp++) {
- /* Unquoted arguments end at blanks. */
- if (0 == quoted) {
- if (' ' == *cp)
- break;
- continue;
- }
- /* After pairs of quotes, move left. */
- if (pairs)
- cp[-pairs] = cp[0];
- /* Pairs of quotes do not end words, ... */
- if ('"' == cp[0] && '"' == cp[1]) {
- pairs++;
- cp++;
- continue;
- }
- /* ... but solitary quotes do. */
- if ('"' != *cp)
- continue;
- if (pairs)
- cp[-pairs] = '\0';
- *cp = ' ';
- break;
- }
- /* Last argument; the remaining ones are empty strings. */
- if ('\0' == *cp)
- continue;
- /* Null-terminate argument and move to the next one. */
- *cp++ = '\0';
- while (' ' == *cp)
- cp++;
- }
+ for (i = 0; i < 9; i++)
+ arg[i] = '\0' == *cp ? "" :
+ mandoc_getarg(r->parse, &cp, ln, &pos);
/*
* Expand macro arguments.
ROFF_REPARSE : ROFF_APPEND);
}
+static char *
+roff_getname(struct roff *r, char **cpp, int ln, int pos)
+{
+ char *name, *cp;
+
+ name = *cpp;
+ if ('\0' == *name)
+ return(name);
+
+ /* Read until end of name. */
+ for (cp = name; '\0' != *cp && ' ' != *cp; cp++) {
+ if ('\\' != *cp)
+ continue;
+ cp++;
+ if ('\\' == *cp)
+ continue;
+ mandoc_msg(MANDOCERR_NAMESC, r->parse, ln, pos, NULL);
+ *cp = '\0';
+ name = cp;
+ }
+
+ /* Nil-terminate name. */
+ if ('\0' != *cp)
+ *(cp++) = '\0';
+
+ /* Read past spaces. */
+ while (' ' == *cp)
+ cp++;
+
+ *cpp = cp;
+ return(name);
+}
+
/*
* Store *string into the user-defined string called *name.
* In multiline mode, append to an existing entry and append '\n';
roff_setstr(struct roff *r, const char *name, const char *string,
int multiline)
{
- struct roffstr *n;
- char *c;
- size_t oldch, newch;
+
+ roff_setstrn(&r->strtab, name, strlen(name), string,
+ string ? strlen(string) : 0, multiline);
+}
+
+static void
+roff_setstrn(struct roffkv **r, const char *name, size_t namesz,
+ const char *string, size_t stringsz, int multiline)
+{
+ struct roffkv *n;
+ char *c;
+ int i;
+ size_t oldch, newch;
/* Search for an existing string with the same name. */
- n = r->first_string;
- while (n && strcmp(name, n->name))
+ n = *r;
+
+ while (n && strcmp(name, n->key.p))
n = n->next;
if (NULL == n) {
/* Create a new string table entry. */
- n = mandoc_malloc(sizeof(struct roffstr));
- n->name = mandoc_strdup(name);
- n->string = NULL;
- n->next = r->first_string;
- r->first_string = n;
+ n = mandoc_malloc(sizeof(struct roffkv));
+ n->key.p = mandoc_strndup(name, namesz);
+ n->key.sz = namesz;
+ n->val.p = NULL;
+ n->val.sz = 0;
+ n->next = *r;
+ *r = n;
} else if (0 == multiline) {
/* In multiline mode, append; else replace. */
- free(n->string);
- n->string = NULL;
+ free(n->val.p);
+ n->val.p = NULL;
+ n->val.sz = 0;
}
if (NULL == string)
* One additional byte for the '\n' in multiline mode,
* and one for the terminating '\0'.
*/
- newch = strlen(string) + (multiline ? 2 : 1);
- if (NULL == n->string) {
- n->string = mandoc_malloc(newch);
- *n->string = '\0';
+ newch = stringsz + (multiline ? 2u : 1u);
+
+ if (NULL == n->val.p) {
+ n->val.p = mandoc_malloc(newch);
+ *n->val.p = '\0';
oldch = 0;
} else {
- oldch = strlen(n->string);
- n->string = mandoc_realloc(n->string, oldch + newch);
+ oldch = n->val.sz;
+ n->val.p = mandoc_realloc(n->val.p, oldch + newch);
}
/* Skip existing content in the destination buffer. */
- c = n->string + oldch;
+ c = n->val.p + (int)oldch;
/* Append new content to the destination buffer. */
- while (*string) {
+ i = 0;
+ while (i < (int)stringsz) {
/*
* Rudimentary roff copy mode:
* Handle escaped backslashes.
*/
- if ('\\' == *string && '\\' == *(string + 1))
- string++;
- *c++ = *string++;
+ if ('\\' == string[i] && '\\' == string[i + 1])
+ i++;
+ *c++ = string[i++];
}
/* Append terminating bytes. */
if (multiline)
*c++ = '\n';
+
*c = '\0';
+ n->val.sz = (int)(c - n->val.p);
}
-
static const char *
roff_getstrn(const struct roff *r, const char *name, size_t len)
{
- const struct roffstr *n;
+ const struct roffkv *n;
- n = r->first_string;
- while (n && (strncmp(name, n->name, len) || '\0' != n->name[(int)len]))
- n = n->next;
+ 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);
- return(n ? n->string : NULL);
+ return(NULL);
}
-
static void
-roff_freestr(struct roff *r)
+roff_freestr(struct roffkv *r)
{
- struct roffstr *n, *nn;
+ struct roffkv *n, *nn;
- for (n = r->first_string; n; n = nn) {
- free(n->name);
- free(n->string);
+ for (n = r; n; n = nn) {
+ free(n->key.p);
+ free(n->val.p);
nn = n->next;
free(n);
}
-
- r->first_string = NULL;
}
const struct tbl_span *
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);
+}
+
+/*
+ * Duplicate an input string, making the appropriate character
+ * conversations (as stipulated by `tr') along the way.
+ * Returns a heap-allocated string with all the replacements made.
+ */
+char *
+roff_strdup(const struct roff *r, const char *p)
+{
+ const struct roffkv *cp;
+ char *res;
+ const char *pp;
+ size_t ssz, sz;
+ enum mandoc_esc esc;
+
+ if (NULL == r->xmbtab && NULL == r->xtab)
+ return(mandoc_strdup(p));
+ else if ('\0' == *p)
+ return(mandoc_strdup(""));
+
+ /*
+ * Step through each character looking for term matches
+ * (remember that a `tr' can be invoked with an escape, which is
+ * a glyph but the escape is multi-character).
+ * We only do this if the character hash has been initialised
+ * and the string is >0 length.
+ */
+
+ res = NULL;
+ 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->xmbtab; cp; cp = cp->next)
+ if (0 == strncmp(p, cp->key.p, cp->key.sz))
+ break;
+
+ if (NULL != cp) {
+ /*
+ * A match has been found.
+ * Append the match to the array and move
+ * forward by its keysize.
+ */
+ 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;
+ }
+
+ /*
+ * 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);
+ res = mandoc_realloc(res, ssz + sz + 1);
+ memcpy(res + ssz, pp, sz);
+ ssz += sz;
+ }
+
+ res[(int)ssz] = '\0';
+ return(res);
+}
git.ckatri.com / mandoc.git / blobdiff