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  /********************************************************************\
  * BitlBee -- An IRC to other IM-networks gateway                     *
  *                                                                    *
  * Copyright 2002-2008 Wilmer van der Gaast and others                *
  \********************************************************************/

/* INI file reading code						*/

/*
  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 with
  the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL;
  if not, write to the Free Software Foundation, Inc., 59 Temple Place,
  Suite 330, Boston, MA  02111-1307  USA
*/
#define BITLBEE_CORE
#include "bitlbee.h"

ini_t *ini_open( char *file )
{
	int fd;
	ini_t *ini = NULL;
	struct stat fi;
	
	if( ( fd = open( file, O_RDONLY ) ) != -1 &&
	    fstat( fd, &fi ) == 0 &&
	    fi.st_size <= 16384 &&
	    ( ini = g_malloc( sizeof( ini_t ) + fi.st_size + 1 ) ) &&
	    read( fd, ini->file, fi.st_size ) == fi.st_size )
	{
		memset( ini, 0, sizeof( ini_t ) );
		ini->size = fi.st_size;
		ini->file[ini->size] = 0;
		ini->cur = ini->file;
		ini->c_section = "";
		
		close( fd );
		
		return ini;
	}

	if( fd >= 0 )
		close( fd );
	
	ini_close( ini );

	return NULL;
}

/* Strips leading and trailing whitespace and returns a pointer to the first
   non-ws character of the given string. */
static char *ini_strip_whitespace( char *in )
{
	char *e;

	while( isspace( *in ) )
		in++;

	e = in + strlen( in ) - 1;
	while( e > in && isspace( *e ) )
		e--;
	e[1] = 0;
	
	return in;
}

int ini_read( ini_t *file )
{
	char *s;
	
	while( file->cur && file->cur < file->file + file->size )
	{
		char *e, *next;
		
		file->line++;

		/* Find the end of line */
		if( ( e = strchr( file->cur, '\n' ) ) != NULL )
		{
			*e = 0;
			next = e + 1;
		}
		else
		{
			/* No more lines. */
			e = file->cur + strlen( file->cur );
			next = NULL;
		}
		
		/* Comment? */
		if( ( s = strchr( file->cur, '#' ) ) != NULL )
			*s = 0;
		
		file->cur = ini_strip_whitespace( file->cur );
		
		if( *file->cur == '[' )
		{
			file->cur++;
			if( ( s = strchr( file->cur, ']' ) ) != NULL )
			{
				*s = 0;
				file->c_section = file->cur;
			}
		}
		else if( ( s = strchr( file->cur, '=' ) ) != NULL )
		{
			*s = 0;
			file->key = ini_strip_whitespace( file->cur );
			file->value = ini_strip_whitespace( s + 1 );
			
			if( ( s = strchr( file->key, '.' ) ) != NULL )
			{
				*s = 0;
				file->section = file->key;
				file->key = s + 1;
			}
			else
			{
				file->section = file->c_section;
			}
			
			file->cur = next;
			return 1;
		}
		/* else: noise/comment/etc, let's just ignore it. */

		file->cur = next;
	}
	
	return 0;
}

void ini_close( ini_t *file )
{
	g_free( file );
}