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/* $Id: cfg.c,v 1.6 2000/04/03 04:46:38 reinelt Exp $
*
* config file stuff
*
* Copyright 1999, 2000 by Michael Reinelt (reinelt@eunet.at)
*
* 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, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
* $Log: cfg.c,v $
* Revision 1.6 2000/04/03 04:46:38 reinelt
*
* added '-c key=val' option
*
* Revision 1.5 2000/03/28 07:22:15 reinelt
*
* version 0.95 released
* X11 driver up and running
* minor bugs fixed
*
* Revision 1.4 2000/03/26 20:00:44 reinelt
*
* README.Raster added
*
* Revision 1.3 2000/03/26 19:03:52 reinelt
*
* more Pixmap renaming
* quoting of '#' in config file
*
* Revision 1.2 2000/03/10 17:36:02 reinelt
*
* first unstable but running release
*
* Revision 1.1 2000/03/10 11:40:47 reinelt
* *** empty log message ***
*
* Revision 1.3 2000/03/07 11:01:34 reinelt
*
* system.c cleanup
*
* Revision 1.2 2000/03/06 06:04:06 reinelt
*
* minor cleanups
*
*/
/*
* exported functions:
*
* cfg_cmd (arg)
* allows us to overwrite entries in the
* config-file from the command line.
* arg is 'key=value'
* cfg_cmd can be called _before_ cfg_read()
* returns 0 if ok, -1 if arg cannot be parsed
*
* cfg_set (key, value)
* pre-set key's value
* should be called before cfg_read()
* so we can specify 'default values'
*
* cfg_get (key)
* return the a value for a given key
* or NULL if key does not exist
*
* cfg_read (file)
* read configuration from file
* returns 0 if successful
* returns -1 in case of an error
*
* cfg_file (void)
* returns the file the configuration was read from
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include "cfg.h"
typedef struct {
char *key;
char *val;
int lock;
} ENTRY;
static char *Config_File=NULL;
static ENTRY *Config=NULL;
static int nConfig=0;
static char *strip (char *s, int strip_comments)
{
char *p;
while (isblank(*s)) s++;
for (p=s; *p; p++) {
if (*p=='"') do p++; while (*p && *p!='\n' && *p!='"');
if (*p=='\'') do p++; while (*p && *p!='\n' && *p!='\'');
if (*p=='\n' || (strip_comments && *p=='#' && (p==s || *(p-1)!='\\'))) {
*p='\0';
break;
}
}
for (p--; p>s && isblank(*p); p--) *p='\0';
return s;
}
static char *dequote (char *string)
{
char *s=string;
char *p=string;
do {
if (*s=='\\' && *(s+1)=='#') {
*p++=*++s;
} else {
*p++=*s;
}
} while (*s++);
return string;
}
static void cfg_add (char *key, char *val, int lock)
{
int i;
for (i=0; i<nConfig; i++) {
if (strcasecmp(Config[i].key, key)==0) {
if (Config[i].lock>lock) return;
if (Config[i].val) free (Config[i].val);
Config[i].val=dequote(strdup(val));
return;
}
}
nConfig++;
Config=realloc(Config, nConfig*sizeof(ENTRY));
Config[i].key=strdup(key);
Config[i].val=dequote(strdup(val));
Config[i].lock=lock;
}
int cfg_cmd (char *arg)
{
char *key, *val;
char buffer[256];
strncpy (buffer, arg, sizeof(buffer));
key=strip(buffer, 0);
for (val=key; *val; val++) {
if (*val=='=') {
*val++='\0';
break;
}
}
if (*key=='\0' || *val=='\0') return -1;
cfg_add (key, val, 1);
return 0;
}
void cfg_set (char *key, char *val)
{
cfg_add (key, val, 0);
}
char *cfg_get (char *key)
{
int i;
for (i=0; i<nConfig; i++) {
if (strcasecmp(Config[i].key, key)==0) {
return Config[i].val;
}
}
return NULL;
}
int cfg_read (char *file)
{
FILE *stream;
char buffer[256];
char *line, *p, *s;
stream=fopen (file, "r");
if (stream==NULL) {
fprintf (stderr, "open(%s) failed: %s\n", file, strerror(errno));
return-1;
}
if (Config_File) free (Config_File);
Config_File=strdup(file);
while ((line=fgets(buffer,256,stream))!=NULL) {
if (*(line=strip(line, 1))=='\0') continue;
for (p=line; *p; p++) {
if (isblank(*p)) {
*p++='\0';
break;
}
}
p=strip(p, 1);
if (*p) for (s=p; *(s+1); s++);
else s=p;
if (*p=='"' && *s=='"') {
*s='\0';
p++;
}
else if (*p=='\'' && *s=='\'') {
*s='\0';
p++;
}
cfg_set (line, p);
}
fclose (stream);
return 0;
}
char *cfg_file (void)
{
if (Config_File)
return Config_File;
else
return "";
}
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