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/* $Header: /home/cvsroot/dvipdfmx/src/pst.c,v 1.6 2008/01/11 18:04:15 matthias Exp $
This is dvipdfmx, an eXtended version of dvipdfm by Mark A. Wicks.
Copyright (C) 2002 by Jin-Hwan Cho and Shunsaku Hirata,
the dvipdfmx project team <dvipdfmx@project.ktug.or.kr>
Copyright (C) 1998, 1999 by Mark A. Wicks <mwicks@kettering.edu>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include <string.h>
#include <ctype.h>
#include "system.h"
#include "mem.h"
#include "error.h"
#include "dpxutil.h"
#include "pst_obj.h"
#include "pst.h"
#define TYPE_CHECK(o, t) do { \
if ((o) == NULL || pst_type_of((o)) != (t)) \
ERROR("typecheck: object %p not of type %d.", (o), (t)); \
} while (0)
static pst_obj *
pst_parse_any (unsigned char **inbuf, unsigned char *inbufend)
{
unsigned char *data;
unsigned char *cur = *inbuf;
unsigned long len;
while (cur < inbufend && !PST_TOKEN_END(cur, inbufend))
cur++;
len = cur - (*inbuf);
data = NEW(len+1, unsigned char);
memcpy(data, *inbuf, len);
data[len] = '\0';
*inbuf = cur;
return pst_new_obj(PST_TYPE_UNKNOWN, data);
}
static void
skip_line (unsigned char **inbuf, unsigned char *inbufend)
{
while (*inbuf < inbufend && **inbuf != '\n' && **inbuf != '\r')
(*inbuf)++;
if (*inbuf < inbufend && **inbuf == '\r')
(*inbuf)++;
if (*inbuf < inbufend && **inbuf == '\n')
(*inbuf)++;
}
static void
skip_comments (unsigned char **inbuf, unsigned char *inbufend)
{
while (*inbuf < inbufend && **inbuf == '%') {
skip_line(inbuf, inbufend);
skip_white_spaces(inbuf, inbufend);
}
}
#if 0
static pst_obj *
pst_parse_comment (unsigned char **inbuf, unsigned char *inbufend)
{
unsigned char *data;
unsigned char *cur = *inbuf;
unsigned long len;
if (*cur != '%')
return NULL;
while (cur < inbufend && *cur != '\n' && *cur != '\r')
cur++;
len = cur - (*inbuf);
data = NEW(len+1, unsigned char);
memcpy(data, *inbuf, len);
data[len] = '\0';
*inbuf = cur;
return pst_new_obj(PST_TYPE_UNKNOWN, data);
}
#endif
/* NOTE: the input buffer must be null-terminated, i.e., *inbufend == 0 */
pst_obj *
pst_get_token (unsigned char **inbuf, unsigned char *inbufend)
{
pst_obj *obj = NULL;
unsigned char c;
ASSERT(*inbuf <= inbufend && !*inbufend);
skip_white_spaces(inbuf, inbufend);
skip_comments(inbuf, inbufend);
if (*inbuf >= inbufend)
return NULL;
c = **inbuf;
switch (c) {
#if 0
case '%':
obj = pst_parse_comment(inbuf, inbufend);
break;
#endif
case '/':
obj = pst_parse_name(inbuf, inbufend);
break;
case '[': case '{': /* This is wrong */
obj = pst_new_mark();
(*inbuf)++;
break;
case '<':
if (*inbuf + 1 >= inbufend)
return NULL;
c = *(*inbuf+1);
if (c == '<') {
obj = pst_new_mark();
*inbuf += 2;
} else if (isxdigit(c))
obj = pst_parse_string(inbuf, inbufend);
else if (c == '~') /* ASCII85 */
obj = pst_parse_string(inbuf, inbufend);
break;
case '(':
obj = pst_parse_string(inbuf, inbufend);
break;
case '>':
if (*inbuf + 1 >= inbufend || *(*inbuf+1) != '>') {
ERROR("Unexpected end of ASCII hex string marker.");
} else {
char *mark;
mark = NEW(3, char);
mark[0] = '>'; mark[1] = '>'; mark[2] = '\0';
obj = pst_new_obj(PST_TYPE_UNKNOWN, mark);
(*inbuf) += 2;
}
break;
case ']': case '}':
{
char *mark;
mark = NEW(2, char);
mark[0] = c; mark[1] = '\0';
obj = pst_new_obj(PST_TYPE_UNKNOWN, mark);
(*inbuf)++;
}
break;
default:
if (c == 't' || c == 'f')
obj = pst_parse_boolean(inbuf, inbufend);
else if (c == 'n')
obj = pst_parse_null(inbuf, inbufend);
else if (c == '+' || c == '-' || isdigit(c) || c == '.')
obj = pst_parse_number(inbuf, inbufend);
break;
}
if (!obj) {
obj = pst_parse_any(inbuf, inbufend);
}
return obj;
}
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