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/* $Id: macro.c,v 1.2 2008/12/15 01:54:58 kristaps Exp $ */
/*
* Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
*
* 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.
*/
#include <assert.h>
#include <ctype.h>
#include <stdlib.h>
#include <stdio.h>
#include "private.h"
#define _C(p) ((const char **)p)
static int isdelim(const char *);
static int args_next(struct mdoc *, int, int *, char *, char **);
static int append_text(struct mdoc *, int, int, int, char *[]);
static int append_scoped(struct mdoc *, int, int, int, char *[]);
static int
isdelim(const char *p)
{
if (0 == *p)
return(0);
if (0 != *(p + 1))
return(0);
switch (*p) {
case('{'):
/* FALLTHROUGH */
case('.'):
/* FALLTHROUGH */
case(','):
/* FALLTHROUGH */
case(';'):
/* FALLTHROUGH */
case(':'):
/* FALLTHROUGH */
case('?'):
/* FALLTHROUGH */
case('!'):
/* FALLTHROUGH */
case('('):
/* FALLTHROUGH */
case(')'):
/* FALLTHROUGH */
case('['):
/* FALLTHROUGH */
case(']'):
/* FALLTHROUGH */
case('}'):
return(1);
default:
break;
}
return(0);
}
static int
args_next(struct mdoc *mdoc, int tok,
int *pos, char *buf, char **v)
{
if (0 == buf[*pos])
return(0);
assert( ! isspace(buf[*pos]));
if ('\"' == buf[*pos]) {
(void)mdoc_err(mdoc, tok, *pos, ERR_SYNTAX_QUOTE);
return(-1);
}
*v = &buf[*pos];
/* Scan ahead to end of token. */
while (buf[*pos] && ! isspace(buf[*pos]))
(*pos)++;
if (buf[*pos] && buf[*pos + 1] && '\\' == buf[*pos]) {
(void)mdoc_err(mdoc, tok, *pos, ERR_SYNTAX_WS);
return(-1);
}
if (0 == buf[*pos])
return(1);
/* Scan ahead over trailing whitespace. */
buf[(*pos)++] = 0;
while (buf[*pos] && isspace(buf[*pos]))
(*pos)++;
if (0 == buf[*pos])
if ( ! mdoc_warn(mdoc, tok, *pos, WARN_SYNTAX_WS_EOLN))
return(-1);
return(1);
}
static int
append_scoped(struct mdoc *mdoc, int tok, int pos, int sz, char *args[])
{
args[sz] = NULL;
mdoc_block_alloc(mdoc, pos, tok, 0, NULL);
mdoc_head_alloc(mdoc, pos, tok, sz, _C(args));
mdoc_body_alloc(mdoc, pos, tok);
return(1);
}
static int
append_text(struct mdoc *mdoc, int tok, int pos, int sz, char *args[])
{
args[sz] = NULL;
switch (tok) {
/* ======= ADD MORE MACRO ARGUMENT-LIMITS BELOW. ======= */
case (MDOC_Ft):
/* FALLTHROUGH */
case (MDOC_Li):
/* FALLTHROUGH */
case (MDOC_Ms):
/* FALLTHROUGH */
case (MDOC_Pa):
/* FALLTHROUGH */
case (MDOC_Tn):
if (0 == sz && ! mdoc_warn(mdoc, tok, pos, WARN_ARGS_GE1))
return(0);
mdoc_elem_alloc(mdoc, pos, tok, 0, NULL, sz, _C(args));
return(1);
case (MDOC_Ar):
/* FALLTHROUGH */
case (MDOC_Cm):
/* FALLTHROUGH */
case (MDOC_Fl):
mdoc_elem_alloc(mdoc, pos, tok, 0, NULL, sz, _C(args));
return(1);
case (MDOC_Ad):
/* FALLTHROUGH */
case (MDOC_Em):
/* FALLTHROUGH */
case (MDOC_Er):
/* FALLTHROUGH */
case (MDOC_Ev):
/* FALLTHROUGH */
case (MDOC_Fa):
/* FALLTHROUGH */
case (MDOC_Dv):
/* FALLTHROUGH */
case (MDOC_Ic):
/* FALLTHROUGH */
case (MDOC_Va):
/* FALLTHROUGH */
case (MDOC_Vt):
if (0 == sz)
return(mdoc_err(mdoc, tok, pos, ERR_ARGS_GE1));
mdoc_elem_alloc(mdoc, pos, tok, 0, NULL, sz, _C(args));
return(1);
/* ======= ADD MORE MACRO ARGUMENT-LIMITS ABOVE. ======= */
default:
break;
}
abort();
/* NOTREACHED */
}
int
macro_text(struct mdoc *mdoc, int tok, int ppos, int *pos, char *buf)
{
int lastarg, j, c, lasttok, lastpunct;
char *args[MDOC_LINEARG_MAX], *p;
lasttok = ppos;
lastpunct = 0;
j = 0;
again:
lastarg = *pos;
c = args_next(mdoc, tok, pos, buf, &args[j]);
if (-1 == c)
return(0);
if (0 == c && ! lastpunct)
return(append_text(mdoc, tok, lasttok, j, args));
else if (0 == c)
return(1);
/* Command found. */
if (MDOC_MAX != (c = mdoc_find(mdoc, args[j]))) {
if ( ! lastpunct)
if ( ! append_text(mdoc, tok, lasttok, j, args))
return(0);
return(mdoc_macro(mdoc, c, lastarg, pos, buf));
}
/* Word found. */
if ( ! isdelim(args[j])) {
j++;
goto again;
}
/* Punctuation found. */
p = args[j]; /* Save argument (NULL-ified in append). */
if ( ! lastpunct)
if ( ! append_text(mdoc, tok, lasttok, j, args))
return(0);
args[j] = p;
mdoc_word_alloc(mdoc, lastarg, args[j]);
lastpunct = 1;
j = 0;
goto again;
/* NOTREACHED */
}
int
macro_scoped_implicit(struct mdoc *mdoc,
int tok, int ppos, int *pos, char *buf)
{
int j, c, lastarg, t;
char *args[MDOC_LINEARG_MAX];
struct mdoc_node *n;
/*
* Look for an implicit parent.
*/
assert( ! (MDOC_EXPLICIT & mdoc_macros[tok].flags));
for (n = mdoc->last; n; n = n->parent) {
if (MDOC_BLOCK != n->type)
continue;
if (tok == (t = n->data.block.tok))
break;
if ( ! (MDOC_EXPLICIT & mdoc_macros[t].flags))
continue;
return(mdoc_err(mdoc, tok, ppos, ERR_SCOPE_BREAK));
}
if (n) {
mdoc->last = n;
mdoc_msg(mdoc, ppos, "scope: rewound `%s'",
mdoc_macronames[tok]);
} else
mdoc_msg(mdoc, ppos, "scope: new `%s'",
mdoc_macronames[tok]);
j = 0;
again:
lastarg = *pos;
c = args_next(mdoc, tok, pos, buf, &args[j]);
if (-1 == c)
return(0);
if (0 == c)
return(append_scoped(mdoc, tok, ppos, j, args));
/* Command found. */
if (MDOC_MAX != (c = mdoc_find(mdoc, args[j])))
if ( ! mdoc_warn(mdoc, tok, *pos, WARN_SYNTAX_MACLIKE))
return(0);
/* Word found. */
j++;
goto again;
/* NOTREACHED */
}
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