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/*
* Copyright 2006 Eduard Bloch
*
* Uses my config parser code and small wrappers to provide the old interface.
*
*/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* 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; see the file COPYING. If not, write to the Free Software
* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <mconfig.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
enum parstate {
KEYBEGINSEARCH,
KEYCOMPARE,
EQSIGNSEARCH,
VALBEGINSEARCH,
LASTCHARSEARCH
};
#define GETVAL_BUF_LEN 512
#define isUspace(x) isspace( (int) (unsigned char) x)
static FILE *glob_cfg_ptr = NULL;
/*
* Warning, uses static line buffer, not reentrant. NULL returned if the key isn't found.
*/
static char *get_value(FILE *srcfile, const char *key, int dorewind) {
static char linebuf[GETVAL_BUF_LEN];
if(!srcfile)
return ((char *) NULL);
if(dorewind)
rewind(srcfile);
if(!key)
return NULL;
next_line:
while(fgets(linebuf, sizeof(linebuf)-1, srcfile)) {
int i;
int keybeg=0;
int s=KEYBEGINSEARCH;
char *ret=NULL;
int lastchar=0;
/* simple state machine, char position moved by the states (or not),
* state change is done by the state (or not) */
for( i=0 ; i<sizeof(linebuf) ; ) {
/* printf("key: %s, %s, s: %d\n", key, linebuf, s); */
switch(s) {
case(KEYBEGINSEARCH):
{
if(isUspace(linebuf[i]))
i++;
else if(linebuf[i] == '#' || linebuf[i]=='\0')
goto next_line;
else {
s=KEYCOMPARE;
keybeg=i;
}
}
break;
case(KEYCOMPARE): /* compare the key */
{
if(key[i-keybeg]=='\0')
/* end of key, next state decides what to do on this position */
s=EQSIGNSEARCH;
else {
if(linebuf[i-keybeg]!=key[i-keybeg])
goto next_line;
else
i++;
}
}
break;
case(EQSIGNSEARCH): /* skip whitespace, stop on =, break on anything else */
{
if(isUspace(linebuf[i]))
i++;
else if(linebuf[i]=='=') {
s=VALBEGINSEARCH;
i++;
}
else
goto next_line;
}
break;
case(VALBEGINSEARCH):
{
if(isUspace(linebuf[i]))
i++;
else {
/* possible at EOF */
if(linebuf[i] == '\0')
return NULL;
lastchar=i-1; /* lastchar can be a space, see below */
ret= & linebuf[i];
s=LASTCHARSEARCH;
}
}
break;
case(LASTCHARSEARCH):
{
if(linebuf[i]) {
if(!isUspace(linebuf[i]))
lastchar=i;
}
else { /* got string end, terminate after the last seen char */
if(linebuf+lastchar < ret) /* no non-space found */
return NULL;
linebuf[lastchar+1]='\0';
return ret;
}
i++;
}
break;
}
}
}
return NULL;
}
int cfg_open(const char *name)
{
if(glob_cfg_ptr) {
fclose(glob_cfg_ptr);
glob_cfg_ptr=NULL;
}
if(!name) {
glob_cfg_ptr=NULL;
return 0;
}
glob_cfg_ptr = fopen(name, "r");
return (glob_cfg_ptr ? 0 : -1);
}
int cfg_close()
{
int r;
if(!glob_cfg_ptr)
return 0;
r=fclose(glob_cfg_ptr);
glob_cfg_ptr=NULL;
return r;
}
void cfg_restart()
{
get_value(glob_cfg_ptr, NULL, 1);
}
char *cfg_get(const char *key)
{
return get_value(glob_cfg_ptr, key, 1);
}
char *cfg_get_next(const char *key)
{
return get_value(glob_cfg_ptr, key, 0);
}
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