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/*
DeaDBeeF - ultimate music player for GNU/Linux systems with X11
Copyright (C) 2009-2011 Alexey Yakovenko <waker@users.sourceforge.net>
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, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include "parser.h"
// very basic parser, ripped from psynth, optimized, and extended to support
// quoted strings and extra special chars
int parser_line;
void
parser_init (void) {
parser_line = 1;
}
const char *
skipws (const char *p) {
while (*p <= ' ' && *p) {
if (*p == '\n') {
parser_line++;
}
p++;
}
if (!*p) {
return NULL;
}
return p;
}
const char *
gettoken (const char *p, char *tok) {
const char *c;
assert (p);
assert (tok);
int n = MAX_TOKEN-1;
char specialchars[] = "{}();";
if (!(p = skipws (p))) {
return NULL;
}
if (*p == '"') {
p++;
c = p;
while (n > 0 && *c && *c != '"') {
if (*c == '\n') {
parser_line++;
}
*tok++ = *c++;
n--;
}
if (*c) {
c++;
}
*tok = 0;
return c;
}
if (strchr (specialchars, *p)) {
*tok = *p;
tok[1] = 0;
return p+1;
}
c = p;
while (n > 0 && *c > ' ' && !strchr (specialchars, *c)) {
*tok++ = *c++;
n--;
}
*tok = 0;
return c;
}
const char *
gettoken_warn_eof (const char *p, char *tok) {
p = gettoken (p, tok);
if (!p) {
fprintf (stderr, "parser: unexpected eof at line %d", parser_line);
}
return p;
}
const char *
gettoken_err_eof (const char *p, char *tok) {
p = gettoken (p, tok);
if (!p) {
fprintf (stderr, "parser: unexpected eof at line %d", parser_line);
exit (-1);
}
return p;
}
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