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/*
** Copyright (C) 2006 Olivier DEMBOUR
** $Id: config.c,v 1.13.4.2 2009/09/04 16:25:42 dembour Exp $
**
**
** 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 <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <config.h>
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#ifdef _WIN32
#include "mywin32.h"
#endif
#include "my_config.h"
#include "debug.h"
#define MAX_LINE_LEN 512
/**
* @brief extract comma separated parameters
* @param[out] stop if we are at EOL
* @retval 0 parameter
**/
static char *extract_param(char **line, uint8_t *stop)
{
char *param;
if ((!*line) || (! **line))
return (0);
param = *line;
*stop = 1;
if ((*line = strchr(*line, ',')))
{
*(*line)++ = 0;
*stop = 0;
}
return (param);
}
/**
* @brief remove space for this line, skip if we see a comment
* @param[in] buffer
**/
static void remove_space(char *buffer)
{
size_t i, j, len;
len = strlen(buffer);
if (!len || !buffer[0] || (buffer[0] == '#'))
return;
for (i=0,j=0; i<len; ++i)
{
if (buffer[i] > 0x20)
{
if (i != j)
buffer[j] = buffer[i];
++j;
}
}
buffer[j] = 0;
}
int get_next_line(char *buffer, int len, FILE *file)
{
while (fgets(buffer, len, file))
{
remove_space(buffer);
if (*buffer != '#')
return (0);
}
return (-1);
}
/**
* @brief extract parameter=value from a line
* @param[in] file file to read
* @param[in] conf configuration
* @param[in] copy_func pointer to the copy function
**/
static void config_extract_token(FILE *file, void *conf,
int (*copy_func)(void *, char *, char *))
{
char buffer[MAX_LINE_LEN + 1];
char token[MAX_LINE_LEN + 1];
char *value;
char *ptr;
uint8_t stop;
token[0] = 0;
stop = 1;
while (get_next_line(buffer, MAX_LINE_LEN, file) != -1)
{
value = buffer;
if ((ptr = strchr(buffer, '=')))
{
*ptr = 0;
value = ptr + 1;
strncpy(token, buffer, MAX_LINE_LEN);
}
ptr = value;
while (((value = extract_param(&ptr, &stop))) && (*value))
copy_func(conf, token, value);
if (stop)
token[0] = 0;
}
}
/**
* @brief read config file
* @param[in] file file to read
* @param[in] conf configuration
* @param[in] copy_func pointer to the copy function
* @param[in] extension default file name
**/
int read_config(char *file, void *conf,
int (*copy_func)(void *, char *, char *),
char *extension)
{
FILE *my_file;
char *home;
if (!*file)
{
if ((!(home = getenv("HOME")))
|| ((strlen(home) > (CONFIG_FILE_LEN - sizeof("/.dns2tcprc") - 10))))
return (-1);
snprintf(file, CONFIG_FILE_LEN-1, "%s/%s", home, extension);
}
if (!(my_file = fopen(file, "r")))
{
DPRINTF(1, "Warn cannot opening config file \'%s\'\n", file);
return (-1);
}
config_extract_token(my_file, conf, copy_func);
return (fclose(my_file));
}
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