/*
  *  Extract RAR archives
  *
  *  Copyright (C) 2005 trog@uncon.org
  *
  *  This code is based on the work of Alexander L. Roshal (C)
  *
  *  The unRAR sources may be used in any software to handle RAR
  *  archives without limitations free of charge, but cannot be used
  *  to re-create the RAR compression algorithm, which is proprietary.
  *  Distribution of modified unRAR sources in separate form or as a
  *  part of other software is permitted, provided that it is clearly
  *  stated in the documentation and source comments that the code may
  *  not be used to develop a RAR (WinRAR) compatible archiver.
  */
 
 #if HAVE_CONFIG_H
 #include "clamav-config.h"
 #endif
 
 #ifdef	HAVE_UNISTD_H
 #include <unistd.h>
 #endif
 
 #include "libclamunrar/unrar.h"
 #include "libclamunrar/unrarfilter.h"
 
 void rar_filter_array_init(rar_filter_array_t *filter_a)
 {
 	filter_a->array = NULL;
 	filter_a->num_items = 0;
 }
 
 void rar_filter_array_reset(rar_filter_array_t *filter_a)
 {
 	int i;
 	
 	if (!filter_a) {
 		return;
 	}
 	for (i=0 ; i < filter_a->num_items ; i++) {
 		rar_filter_delete(filter_a->array[i]);
 	}
 	if (filter_a->array) {
 		free(filter_a->array);
 	}
 	filter_a->array = NULL;
 	filter_a->num_items = 0;
 }
 
 int rar_filter_array_add(rar_filter_array_t *filter_a, int num)
 {
 	filter_a->num_items += num;
 	filter_a->array = (struct UnpackFilter **) rar_realloc2(filter_a->array,
 			filter_a->num_items * sizeof(struct UnpackFilter **));
 	if (filter_a->array == NULL) {
 		filter_a->num_items=0;
 		return FALSE;
 	}
 	filter_a->array[filter_a->num_items-1] = NULL;
 	return TRUE;
 }
 
 struct UnpackFilter *rar_filter_new(void)
 {
 	struct UnpackFilter *filter;
 	
 	filter = (struct UnpackFilter *) rar_malloc(sizeof(struct UnpackFilter));
 	if (!filter) {
 		return NULL;
 	}
 	filter->block_start = 0;
   	filter->block_length = 0;
   	filter->exec_count = 0;
   	filter->next_window = 0;
   	
    	rar_cmd_array_init(&filter->prg.cmd);
 	filter->prg.global_data = NULL;
 	filter->prg.static_data = NULL;
 	filter->prg.global_size = filter->prg.static_size = 0;
 	filter->prg.filtered_data = NULL;
 	filter->prg.filtered_data_size = 0;
   	return filter;
 }
 
 void rar_filter_delete(struct UnpackFilter *filter)
 {
 	if (!filter) {
 		return;
 	}
 	if (filter->prg.global_data) {
 		free(filter->prg.global_data);
 	}
 	if (filter->prg.static_data) {
 		free(filter->prg.static_data);
 	}
 	rar_cmd_array_reset(&filter->prg.cmd);
 	free(filter);
 }