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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* miav_config.cc
*
* Sat Feb 19 14:13:19 CET 2005
* Copyright 2005 Bent Bisballe
* deva@aasimon.org
****************************************************************************/
/*
* 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 Library 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 <config.h>
#include "miav_config.h"
MiavConfig::MiavConfig(char *file)
{
configs = NULL;
// Read config file
FILE* fp = fopen(file, "r");
if(!fp) {
fprintf(stderr, "Error reading configuration file %s\n", file);
return;
}
fseek(fp, 0, SEEK_END);
int fsz = ftell(fp);
fseek(fp, 0, SEEK_SET);
char *raw = (char*)calloc(fsz, 1);
fread(raw, 1, fsz, fp);
fclose(fp);
parse(raw);
free(raw);
}
MiavConfig::~MiavConfig()
{
_cfg *die = NULL;
_cfg *cfg = configs;
while(cfg) {
if(die) free(die);
die = cfg;
cfg = cfg->next;
}
if(die) free(die);
}
/**
* Adds one configuration entry, from a single zero terminated line.
*/
_cfg *MiavConfig::addConfig(_cfg *parent, char* conf)
{
//
// FIXME: Check for wellformedness
//
_cfg *cfg;
printf("[%s]\n", conf);
cfg = (_cfg*) malloc(sizeof(_cfg));
if(!parent) configs = cfg;
int namelen = strchr(conf, '=') - conf;
char* name = (char*)calloc(namelen + 1, 1);
strncpy(name, conf, namelen);
printf("name [%s]#%d - ", name, namelen);
int vallen = conf + strlen(conf) - (strchr(conf, '=') + 1);
char* val = (char*)calloc(vallen + 1, 1);
strncpy(val, conf + strlen(conf) - vallen, vallen);
printf("val [%s]#%d\n", val, vallen);
cfg->name = new string((const char*)name);
free(name);
cfg->stringval = new string((const char*)val);
cfg->intval = atoi(val);
cfg->floatval = atof(val);
cfg->boolval = atoi(val) != 0;
free(val);
cfg->next = NULL;
if(parent) parent->next = cfg;
return cfg;
}
/**
* Main parse function, iterates the lines of the file.
*/
int MiavConfig::parse(char* raw)
{
// Strip the string
char *conf = strip(raw);
char *conf_end = conf + strlen(conf);
char *start = conf;
char *p;
_cfg *cfg = NULL;
// Iterate the lines in the string
for(p = conf; p < conf_end; p++) {
if(*p == '\n') {
*p = '\0';
cfg = addConfig(cfg, start);
start = p+1;
}
}
// Allocated in strip
free(conf);
printf("done!\n");
return 0;
}
/**
* Strip all unwanted data from the string, initial to parsing.
*/
char* MiavConfig::strip(char* conf)
{
// Freed in parse!!!
char *stripped = (char*)calloc(strlen(conf) + 2, 1);
char *r;
char *w = stripped;
bool instring = false;
bool incomment = false;
// Iterate over the characters in the input string.
for(r = conf; r < conf + strlen(conf); r++) {
if(strchr("#", *r)) incomment = true;
if(strchr("\n", *r)) incomment = false;
if(!incomment) {
if(instring) {
// When in a string, accept anything, except ".
if(*r != '\"') {
*w = *r;
w++;
}
} else {
// Only copy valid characters
if(strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890-_,.=", *r)) {
// Change comma into dot
if(*r == ',') *r = '.';
*w = *r;
w++;
}
// We don't want double newlines and initial newline!
if((*r == '\n') && (*(w-1) != '\n') && (w != stripped)) {
*w = *r;
w++;
}
}
}
if(strchr("\"", *r)) instring = !instring;
}
// If we are not ending on a newline, we better append one
if(*(w-1) != '\n') {
*w = '\n';
w++;
}
// Make sure we are nullterminated.
*w = '\0';
return stripped;
}
int MiavConfig::readInt(char *node)
{
return findNode(node)->intval;
}
bool MiavConfig::readBool(char *node)
{
return findNode(node)->boolval;
}
string *MiavConfig::readString(char *node)
{
return findNode(node)->stringval;
}
float MiavConfig::readFloat(char *node)
{
return findNode(node)->floatval;
}
_cfg *MiavConfig::findNode(char* node)
{
_cfg *cfg = configs;
while(cfg) {
if(!strcmp(node, cfg->name->c_str())) return cfg;
cfg = cfg->next;
}
fprintf(stderr, "ERROR: Request for nonexisting node \"%s\"!\n", node);
exit(1);
}
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