minix/external/bsd/mdocml/dist/mdoc_argv.c

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/* $Vendor-Id: mdoc_argv.c,v 1.82 2012/03/23 05:50:24 kristaps Exp $ */
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/*
* Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
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*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/types.h>
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "mdoc.h"
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#include "mandoc.h"
#include "libmdoc.h"
#include "libmandoc.h"
#define MULTI_STEP 5 /* pre-allocate argument values */
#define DELIMSZ 6 /* max possible size of a delimiter */
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enum argsflag {
ARGSFL_NONE = 0,
ARGSFL_DELIM, /* handle delimiters of [[::delim::][ ]+]+ */
ARGSFL_TABSEP /* handle tab/`Ta' separated phrases */
};
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enum argvflag {
ARGV_NONE, /* no args to flag (e.g., -split) */
ARGV_SINGLE, /* one arg to flag (e.g., -file xxx) */
ARGV_MULTI, /* multiple args (e.g., -column xxx yyy) */
ARGV_OPT_SINGLE /* optional arg (e.g., -offset [xxx]) */
};
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struct mdocarg {
enum argsflag flags;
const enum mdocargt *argvs;
};
static void argn_free(struct mdoc_arg *, int);
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static enum margserr args(struct mdoc *, int, int *,
char *, enum argsflag, char **);
static int args_checkpunct(const char *, int);
static int argv_multi(struct mdoc *, int,
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struct mdoc_argv *, int *, char *);
static int argv_opt_single(struct mdoc *, int,
struct mdoc_argv *, int *, char *);
static int argv_single(struct mdoc *, int,
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struct mdoc_argv *, int *, char *);
static const enum argvflag argvflags[MDOC_ARG_MAX] = {
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ARGV_NONE, /* MDOC_Split */
ARGV_NONE, /* MDOC_Nosplit */
ARGV_NONE, /* MDOC_Ragged */
ARGV_NONE, /* MDOC_Unfilled */
ARGV_NONE, /* MDOC_Literal */
ARGV_SINGLE, /* MDOC_File */
ARGV_OPT_SINGLE, /* MDOC_Offset */
ARGV_NONE, /* MDOC_Bullet */
ARGV_NONE, /* MDOC_Dash */
ARGV_NONE, /* MDOC_Hyphen */
ARGV_NONE, /* MDOC_Item */
ARGV_NONE, /* MDOC_Enum */
ARGV_NONE, /* MDOC_Tag */
ARGV_NONE, /* MDOC_Diag */
ARGV_NONE, /* MDOC_Hang */
ARGV_NONE, /* MDOC_Ohang */
ARGV_NONE, /* MDOC_Inset */
ARGV_MULTI, /* MDOC_Column */
ARGV_OPT_SINGLE, /* MDOC_Width */
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ARGV_NONE, /* MDOC_Compact */
ARGV_NONE, /* MDOC_Std */
ARGV_NONE, /* MDOC_Filled */
ARGV_NONE, /* MDOC_Words */
ARGV_NONE, /* MDOC_Emphasis */
ARGV_NONE, /* MDOC_Symbolic */
ARGV_NONE /* MDOC_Symbolic */
};
static const enum mdocargt args_Ex[] = {
MDOC_Std,
MDOC_ARG_MAX
};
static const enum mdocargt args_An[] = {
MDOC_Split,
MDOC_Nosplit,
MDOC_ARG_MAX
};
static const enum mdocargt args_Bd[] = {
MDOC_Ragged,
MDOC_Unfilled,
MDOC_Filled,
MDOC_Literal,
MDOC_File,
MDOC_Offset,
MDOC_Compact,
MDOC_Centred,
MDOC_ARG_MAX
};
static const enum mdocargt args_Bf[] = {
MDOC_Emphasis,
MDOC_Literal,
MDOC_Symbolic,
MDOC_ARG_MAX
};
static const enum mdocargt args_Bk[] = {
MDOC_Words,
MDOC_ARG_MAX
};
static const enum mdocargt args_Bl[] = {
MDOC_Bullet,
MDOC_Dash,
MDOC_Hyphen,
MDOC_Item,
MDOC_Enum,
MDOC_Tag,
MDOC_Diag,
MDOC_Hang,
MDOC_Ohang,
MDOC_Inset,
MDOC_Column,
MDOC_Width,
MDOC_Offset,
MDOC_Compact,
MDOC_Nested,
MDOC_ARG_MAX
};
static const struct mdocarg mdocargs[MDOC_MAX] = {
{ ARGSFL_NONE, NULL }, /* Ap */
{ ARGSFL_NONE, NULL }, /* Dd */
{ ARGSFL_NONE, NULL }, /* Dt */
{ ARGSFL_NONE, NULL }, /* Os */
{ ARGSFL_NONE, NULL }, /* Sh */
{ ARGSFL_NONE, NULL }, /* Ss */
{ ARGSFL_NONE, NULL }, /* Pp */
{ ARGSFL_DELIM, NULL }, /* D1 */
{ ARGSFL_DELIM, NULL }, /* Dl */
{ ARGSFL_NONE, args_Bd }, /* Bd */
{ ARGSFL_NONE, NULL }, /* Ed */
{ ARGSFL_NONE, args_Bl }, /* Bl */
{ ARGSFL_NONE, NULL }, /* El */
{ ARGSFL_NONE, NULL }, /* It */
{ ARGSFL_DELIM, NULL }, /* Ad */
{ ARGSFL_DELIM, args_An }, /* An */
{ ARGSFL_DELIM, NULL }, /* Ar */
{ ARGSFL_NONE, NULL }, /* Cd */
{ ARGSFL_DELIM, NULL }, /* Cm */
{ ARGSFL_DELIM, NULL }, /* Dv */
{ ARGSFL_DELIM, NULL }, /* Er */
{ ARGSFL_DELIM, NULL }, /* Ev */
{ ARGSFL_NONE, args_Ex }, /* Ex */
{ ARGSFL_DELIM, NULL }, /* Fa */
{ ARGSFL_NONE, NULL }, /* Fd */
{ ARGSFL_DELIM, NULL }, /* Fl */
{ ARGSFL_DELIM, NULL }, /* Fn */
{ ARGSFL_DELIM, NULL }, /* Ft */
{ ARGSFL_DELIM, NULL }, /* Ic */
{ ARGSFL_NONE, NULL }, /* In */
{ ARGSFL_DELIM, NULL }, /* Li */
{ ARGSFL_NONE, NULL }, /* Nd */
{ ARGSFL_DELIM, NULL }, /* Nm */
{ ARGSFL_DELIM, NULL }, /* Op */
{ ARGSFL_NONE, NULL }, /* Ot */
{ ARGSFL_DELIM, NULL }, /* Pa */
{ ARGSFL_NONE, args_Ex }, /* Rv */
{ ARGSFL_DELIM, NULL }, /* St */
{ ARGSFL_DELIM, NULL }, /* Va */
{ ARGSFL_DELIM, NULL }, /* Vt */
{ ARGSFL_DELIM, NULL }, /* Xr */
{ ARGSFL_NONE, NULL }, /* %A */
{ ARGSFL_NONE, NULL }, /* %B */
{ ARGSFL_NONE, NULL }, /* %D */
{ ARGSFL_NONE, NULL }, /* %I */
{ ARGSFL_NONE, NULL }, /* %J */
{ ARGSFL_NONE, NULL }, /* %N */
{ ARGSFL_NONE, NULL }, /* %O */
{ ARGSFL_NONE, NULL }, /* %P */
{ ARGSFL_NONE, NULL }, /* %R */
{ ARGSFL_NONE, NULL }, /* %T */
{ ARGSFL_NONE, NULL }, /* %V */
{ ARGSFL_DELIM, NULL }, /* Ac */
{ ARGSFL_NONE, NULL }, /* Ao */
{ ARGSFL_DELIM, NULL }, /* Aq */
{ ARGSFL_DELIM, NULL }, /* At */
{ ARGSFL_DELIM, NULL }, /* Bc */
{ ARGSFL_NONE, args_Bf }, /* Bf */
{ ARGSFL_NONE, NULL }, /* Bo */
{ ARGSFL_DELIM, NULL }, /* Bq */
{ ARGSFL_DELIM, NULL }, /* Bsx */
{ ARGSFL_DELIM, NULL }, /* Bx */
{ ARGSFL_NONE, NULL }, /* Db */
{ ARGSFL_DELIM, NULL }, /* Dc */
{ ARGSFL_NONE, NULL }, /* Do */
{ ARGSFL_DELIM, NULL }, /* Dq */
{ ARGSFL_DELIM, NULL }, /* Ec */
{ ARGSFL_NONE, NULL }, /* Ef */
{ ARGSFL_DELIM, NULL }, /* Em */
{ ARGSFL_NONE, NULL }, /* Eo */
{ ARGSFL_DELIM, NULL }, /* Fx */
{ ARGSFL_DELIM, NULL }, /* Ms */
{ ARGSFL_DELIM, NULL }, /* No */
{ ARGSFL_DELIM, NULL }, /* Ns */
{ ARGSFL_DELIM, NULL }, /* Nx */
{ ARGSFL_DELIM, NULL }, /* Ox */
{ ARGSFL_DELIM, NULL }, /* Pc */
{ ARGSFL_DELIM, NULL }, /* Pf */
{ ARGSFL_NONE, NULL }, /* Po */
{ ARGSFL_DELIM, NULL }, /* Pq */
{ ARGSFL_DELIM, NULL }, /* Qc */
{ ARGSFL_DELIM, NULL }, /* Ql */
{ ARGSFL_NONE, NULL }, /* Qo */
{ ARGSFL_DELIM, NULL }, /* Qq */
{ ARGSFL_NONE, NULL }, /* Re */
{ ARGSFL_NONE, NULL }, /* Rs */
{ ARGSFL_DELIM, NULL }, /* Sc */
{ ARGSFL_NONE, NULL }, /* So */
{ ARGSFL_DELIM, NULL }, /* Sq */
{ ARGSFL_NONE, NULL }, /* Sm */
{ ARGSFL_DELIM, NULL }, /* Sx */
{ ARGSFL_DELIM, NULL }, /* Sy */
{ ARGSFL_DELIM, NULL }, /* Tn */
{ ARGSFL_DELIM, NULL }, /* Ux */
{ ARGSFL_DELIM, NULL }, /* Xc */
{ ARGSFL_NONE, NULL }, /* Xo */
{ ARGSFL_NONE, NULL }, /* Fo */
{ ARGSFL_NONE, NULL }, /* Fc */
{ ARGSFL_NONE, NULL }, /* Oo */
{ ARGSFL_DELIM, NULL }, /* Oc */
{ ARGSFL_NONE, args_Bk }, /* Bk */
{ ARGSFL_NONE, NULL }, /* Ek */
{ ARGSFL_NONE, NULL }, /* Bt */
{ ARGSFL_NONE, NULL }, /* Hf */
{ ARGSFL_NONE, NULL }, /* Fr */
{ ARGSFL_NONE, NULL }, /* Ud */
{ ARGSFL_NONE, NULL }, /* Lb */
{ ARGSFL_NONE, NULL }, /* Lp */
{ ARGSFL_DELIM, NULL }, /* Lk */
{ ARGSFL_DELIM, NULL }, /* Mt */
{ ARGSFL_DELIM, NULL }, /* Brq */
{ ARGSFL_NONE, NULL }, /* Bro */
{ ARGSFL_DELIM, NULL }, /* Brc */
{ ARGSFL_NONE, NULL }, /* %C */
{ ARGSFL_NONE, NULL }, /* Es */
{ ARGSFL_NONE, NULL }, /* En */
{ ARGSFL_NONE, NULL }, /* Dx */
{ ARGSFL_NONE, NULL }, /* %Q */
{ ARGSFL_NONE, NULL }, /* br */
{ ARGSFL_NONE, NULL }, /* sp */
{ ARGSFL_NONE, NULL }, /* %U */
{ ARGSFL_NONE, NULL }, /* Ta */
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};
/*
* Parse an argument from line text. This comes in the form of -key
* [value0...], which may either have a single mandatory value, at least
* one mandatory value, an optional single value, or no value.
*/
enum margverr
mdoc_argv(struct mdoc *m, int line, enum mdoct tok,
struct mdoc_arg **v, int *pos, char *buf)
{
char *p, sv;
struct mdoc_argv tmp;
struct mdoc_arg *arg;
const enum mdocargt *ap;
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if ('\0' == buf[*pos])
return(ARGV_EOLN);
else if (NULL == (ap = mdocargs[tok].argvs))
return(ARGV_WORD);
else if ('-' != buf[*pos])
return(ARGV_WORD);
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/* Seek to the first unescaped space. */
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p = &buf[++(*pos)];
assert(*pos > 0);
for ( ; buf[*pos] ; (*pos)++)
if (' ' == buf[*pos] && '\\' != buf[*pos - 1])
break;
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/*
* We want to nil-terminate the word to look it up (it's easier
* that way). But we may not have a flag, in which case we need
* to restore the line as-is. So keep around the stray byte,
* which we'll reset upon exiting (if necessary).
*/
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if ('\0' != (sv = buf[*pos]))
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buf[(*pos)++] = '\0';
/*
* Now look up the word as a flag. Use temporary storage that
* we'll copy into the node's flags, if necessary.
*/
memset(&tmp, 0, sizeof(struct mdoc_argv));
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tmp.line = line;
tmp.pos = *pos;
tmp.arg = MDOC_ARG_MAX;
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while (MDOC_ARG_MAX != (tmp.arg = *ap++))
if (0 == strcmp(p, mdoc_argnames[tmp.arg]))
break;
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if (MDOC_ARG_MAX == tmp.arg) {
/*
* The flag was not found.
* Restore saved zeroed byte and return as a word.
*/
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if (sv)
buf[*pos - 1] = sv;
return(ARGV_WORD);
}
/* Read to the next word (the argument). */
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while (buf[*pos] && ' ' == buf[*pos])
(*pos)++;
switch (argvflags[tmp.arg]) {
case (ARGV_SINGLE):
if ( ! argv_single(m, line, &tmp, pos, buf))
return(ARGV_ERROR);
break;
case (ARGV_MULTI):
if ( ! argv_multi(m, line, &tmp, pos, buf))
return(ARGV_ERROR);
break;
case (ARGV_OPT_SINGLE):
if ( ! argv_opt_single(m, line, &tmp, pos, buf))
return(ARGV_ERROR);
break;
case (ARGV_NONE):
break;
}
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if (NULL == (arg = *v))
arg = *v = mandoc_calloc(1, sizeof(struct mdoc_arg));
arg->argc++;
arg->argv = mandoc_realloc
(arg->argv, arg->argc * sizeof(struct mdoc_argv));
memcpy(&arg->argv[(int)arg->argc - 1],
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&tmp, sizeof(struct mdoc_argv));
return(ARGV_ARG);
}
void
mdoc_argv_free(struct mdoc_arg *p)
{
int i;
if (NULL == p)
return;
if (p->refcnt) {
--(p->refcnt);
if (p->refcnt)
return;
}
assert(p->argc);
for (i = (int)p->argc - 1; i >= 0; i--)
argn_free(p, i);
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free(p->argv);
free(p);
}
static void
argn_free(struct mdoc_arg *p, int iarg)
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{
struct mdoc_argv *arg;
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int j;
arg = &p->argv[iarg];
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if (arg->sz && arg->value) {
for (j = (int)arg->sz - 1; j >= 0; j--)
free(arg->value[j]);
free(arg->value);
}
for (--p->argc; iarg < (int)p->argc; iarg++)
p->argv[iarg] = p->argv[iarg+1];
}
enum margserr
mdoc_zargs(struct mdoc *m, int line, int *pos, char *buf, char **v)
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{
return(args(m, line, pos, buf, ARGSFL_NONE, v));
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}
enum margserr
mdoc_args(struct mdoc *m, int line, int *pos,
char *buf, enum mdoct tok, char **v)
{
enum argsflag fl;
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struct mdoc_node *n;
fl = mdocargs[tok].flags;
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if (MDOC_It != tok)
return(args(m, line, pos, buf, fl, v));
/*
* We know that we're in an `It', so it's reasonable to expect
* us to be sitting in a `Bl'. Someday this may not be the case
* (if we allow random `It's sitting out there), so provide a
* safe fall-back into the default behaviour.
*/
for (n = m->last; n; n = n->parent)
if (MDOC_Bl == n->tok)
if (LIST_column == n->norm->Bl.type) {
fl = ARGSFL_TABSEP;
break;
}
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return(args(m, line, pos, buf, fl, v));
}
static enum margserr
args(struct mdoc *m, int line, int *pos,
char *buf, enum argsflag fl, char **v)
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{
char *p, *pp;
enum margserr rc;
if ('\0' == buf[*pos]) {
if (MDOC_PPHRASE & m->flags)
return(ARGS_EOLN);
/*
* If we're not in a partial phrase and the flag for
* being a phrase literal is still set, the punctuation
* is unterminated.
*/
if (MDOC_PHRASELIT & m->flags)
mdoc_pmsg(m, line, *pos, MANDOCERR_BADQUOTE);
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m->flags &= ~MDOC_PHRASELIT;
return(ARGS_EOLN);
}
*v = &buf[*pos];
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if (ARGSFL_DELIM == fl)
if (args_checkpunct(buf, *pos))
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return(ARGS_PUNCT);
/*
* First handle TABSEP items, restricted to `Bl -column'. This
* ignores conventional token parsing and instead uses tabs or
* `Ta' macros to separate phrases. Phrases are parsed again
* for arguments at a later phase.
*/
if (ARGSFL_TABSEP == fl) {
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/* Scan ahead to tab (can't be escaped). */
p = strchr(*v, '\t');
pp = NULL;
/* Scan ahead to unescaped `Ta'. */
if ( ! (MDOC_PHRASELIT & m->flags))
for (pp = *v; ; pp++) {
if (NULL == (pp = strstr(pp, "Ta")))
break;
if (pp > *v && ' ' != *(pp - 1))
continue;
if (' ' == *(pp + 2) || '\0' == *(pp + 2))
break;
}
/* By default, assume a phrase. */
rc = ARGS_PHRASE;
/*
* Adjust new-buffer position to be beyond delimiter
* mark (e.g., Ta -> end + 2).
*/
if (p && pp) {
*pos += pp < p ? 2 : 1;
rc = pp < p ? ARGS_PHRASE : ARGS_PPHRASE;
p = pp < p ? pp : p;
} else if (p && ! pp) {
rc = ARGS_PPHRASE;
*pos += 1;
} else if (pp && ! p) {
p = pp;
*pos += 2;
} else {
rc = ARGS_PEND;
p = strchr(*v, 0);
}
/* Whitespace check for eoln case... */
if ('\0' == *p && ' ' == *(p - 1))
mdoc_pmsg(m, line, *pos, MANDOCERR_EOLNSPACE);
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*pos += (int)(p - *v);
/* Strip delimiter's preceding whitespace. */
pp = p - 1;
while (pp > *v && ' ' == *pp) {
if (pp > *v && '\\' == *(pp - 1))
break;
pp--;
}
*(pp + 1) = 0;
/* Strip delimiter's proceeding whitespace. */
for (pp = &buf[*pos]; ' ' == *pp; pp++, (*pos)++)
/* Skip ahead. */ ;
return(rc);
}
/*
* Process a quoted literal. A quote begins with a double-quote
* and ends with a double-quote NOT preceded by a double-quote.
* Whitespace is NOT involved in literal termination.
*/
if (MDOC_PHRASELIT & m->flags || '\"' == buf[*pos]) {
if ( ! (MDOC_PHRASELIT & m->flags))
*v = &buf[++(*pos)];
if (MDOC_PPHRASE & m->flags)
m->flags |= MDOC_PHRASELIT;
for ( ; buf[*pos]; (*pos)++) {
if ('\"' != buf[*pos])
continue;
if ('\"' != buf[*pos + 1])
break;
(*pos)++;
}
if ('\0' == buf[*pos]) {
if (MDOC_PPHRASE & m->flags)
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return(ARGS_QWORD);
mdoc_pmsg(m, line, *pos, MANDOCERR_BADQUOTE);
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return(ARGS_QWORD);
}
m->flags &= ~MDOC_PHRASELIT;
buf[(*pos)++] = '\0';
if ('\0' == buf[*pos])
return(ARGS_QWORD);
while (' ' == buf[*pos])
(*pos)++;
if ('\0' == buf[*pos])
mdoc_pmsg(m, line, *pos, MANDOCERR_EOLNSPACE);
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return(ARGS_QWORD);
}
p = &buf[*pos];
*v = mandoc_getarg(m->parse, &p, line, pos);
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return(ARGS_WORD);
}
/*
* Check if the string consists only of space-separated closing
* delimiters. This is a bit of a dance: the first must be a close
* delimiter, but it may be followed by middle delimiters. Arbitrary
* whitespace may separate these tokens.
*/
static int
args_checkpunct(const char *buf, int i)
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{
int j;
char dbuf[DELIMSZ];
enum mdelim d;
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/* First token must be a close-delimiter. */
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for (j = 0; buf[i] && ' ' != buf[i] && j < DELIMSZ; j++, i++)
dbuf[j] = buf[i];
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if (DELIMSZ == j)
return(0);
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dbuf[j] = '\0';
if (DELIM_CLOSE != mdoc_isdelim(dbuf))
return(0);
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while (' ' == buf[i])
i++;
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/* Remaining must NOT be open/none. */
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while (buf[i]) {
j = 0;
while (buf[i] && ' ' != buf[i] && j < DELIMSZ)
dbuf[j++] = buf[i++];
if (DELIMSZ == j)
return(0);
dbuf[j] = '\0';
d = mdoc_isdelim(dbuf);
if (DELIM_NONE == d || DELIM_OPEN == d)
return(0);
while (' ' == buf[i])
i++;
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}
return('\0' == buf[i]);
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}
static int
argv_multi(struct mdoc *m, int line,
struct mdoc_argv *v, int *pos, char *buf)
{
enum margserr ac;
char *p;
for (v->sz = 0; ; v->sz++) {
if ('-' == buf[*pos])
break;
ac = args(m, line, pos, buf, ARGSFL_NONE, &p);
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if (ARGS_ERROR == ac)
return(0);
else if (ARGS_EOLN == ac)
break;
if (0 == v->sz % MULTI_STEP)
v->value = mandoc_realloc(v->value,
(v->sz + MULTI_STEP) * sizeof(char *));
v->value[(int)v->sz] = mandoc_strdup(p);
}
return(1);
}
static int
argv_opt_single(struct mdoc *m, int line,
struct mdoc_argv *v, int *pos, char *buf)
{
enum margserr ac;
char *p;
if ('-' == buf[*pos])
return(1);
ac = args(m, line, pos, buf, ARGSFL_NONE, &p);
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if (ARGS_ERROR == ac)
return(0);
if (ARGS_EOLN == ac)
return(1);
v->sz = 1;
v->value = mandoc_malloc(sizeof(char *));
v->value[0] = mandoc_strdup(p);
return(1);
}
static int
argv_single(struct mdoc *m, int line,
struct mdoc_argv *v, int *pos, char *buf)
{
int ppos;
enum margserr ac;
char *p;
ppos = *pos;
ac = args(m, line, pos, buf, ARGSFL_NONE, &p);
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if (ARGS_EOLN == ac) {
mdoc_pmsg(m, line, ppos, MANDOCERR_SYNTARGVCOUNT);
return(0);
} else if (ARGS_ERROR == ac)
return(0);
v->sz = 1;
v->value = mandoc_malloc(sizeof(char *));
v->value[0] = mandoc_strdup(p);
return(1);
}