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// Copyright (c) Athena Dev Teams - Licensed under GNU GPL
// For more information, see LICENCE in the main folder
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include "grfio.h"
#include "malloc.h"
#include "../zlib/unzip.h"
#ifdef __WIN32
#include "../zlib/zlib.h"
#include "../zlib/iowin32.h"
#else
#ifndef __FREEBSD__
#include <zlib.h>
#endif
#endif
int decode_zip(unsigned char *dest, unsigned long* destLen, const unsigned char* source, unsigned long sourceLen)
{
z_stream stream;
int err;
stream.next_in = (Bytef*)source;
stream.avail_in = (uInt)sourceLen;
/* Check for source > 64K on 16-bit machine: */
if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
stream.next_out = (Bytef*) dest;
stream.avail_out = (uInt)*destLen;
if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
stream.zalloc = (alloc_func)0;
stream.zfree = (free_func)0;
err = inflateInit(&stream);
if (err != Z_OK) return err;
err = inflate(&stream, Z_FINISH);
if (err != Z_STREAM_END) {
inflateEnd(&stream);
return err == Z_OK ? Z_BUF_ERROR : err;
}
*destLen = stream.total_out;
err = inflateEnd(&stream);
return err;
}
int encode_zip(unsigned char *dest, unsigned long* destLen, const unsigned char* source, unsigned long sourceLen) {
z_stream stream;
int err;
memset(&stream, 0, sizeof(stream));
stream.next_in = (Bytef*)source;
stream.avail_in = (uInt)sourceLen;
/* Check for source > 64K on 16-bit machine: */
if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
stream.next_out = (Bytef*) dest;
stream.avail_out = (uInt)*destLen;
if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
stream.zalloc = (alloc_func)0;
stream.zfree = (free_func)0;
err = deflateInit(&stream,Z_DEFAULT_COMPRESSION);
if (err != Z_OK) return err;
err = deflate(&stream, Z_FINISH);
if (err != Z_STREAM_END) {
inflateEnd(&stream);
return err == Z_OK ? Z_BUF_ERROR : err;
}
*destLen = stream.total_out;
err = deflateEnd(&stream);
return err;
}
/* ===================================
* Unzips a file. 1: success, 0: error
* Adapted from miniunz.c [Celest]
* Version 1.01b, May 30th, 2004
* Copyright (C) 1998-2004 Gilles Vollant
* -------------------------------------
*/
int deflate_file (const char *source, const char *filename)
{
#ifdef _WIN32
zlib_filefunc_def ffunc;
#endif
unzFile uf = NULL;
int err = UNZ_OK;
uInt size_buf = 8192;
FILE *fout = NULL;
void *buf;
#ifdef _WIN32
fill_win32_filefunc(&ffunc);
uf = unzOpen2(source, &ffunc);
#else
uf = unzOpen(source);
#endif
if (uf == NULL) {
//printf("Cannot open %s\n", source);
return 0;
}
//printf("%s opened\n", source);
if (unzLocateFile(uf, filename, 0) != UNZ_OK) {
//printf("file %s not found in the zipfile\n", filename);
return 0;
}
err = unzOpenCurrentFilePassword(uf, NULL);
//if (err != UNZ_OK)
// printf("error %d with zipfile in unzOpenCurrentFilePassword\n", err);
fout = fopen(filename,"wb");
if (fout == NULL) {
//printf("error opening %s\n", filename);
return 0;
}
buf = (void *)aMalloc(size_buf);
do {
err = unzReadCurrentFile(uf, buf, size_buf);
if (err < 0) {
//printf("error %d with zipfile in unzReadCurrentFile\n", err);
break;
}
if (err > 0 &&
fwrite(buf, err, 1, fout)!=1)
{
//printf("error in writing extracted file\n");
err = UNZ_ERRNO;
break;
}
} while (err > 0);
if (fout) fclose(fout);
if (err == UNZ_OK) {
err = unzCloseCurrentFile (uf);
//if (err != UNZ_OK)
// printf("error %d with zipfile in unzCloseCurrentFile\n", err);
aFree(buf);
return (err == UNZ_OK);
}
unzCloseCurrentFile(uf); /* don't lose the error */
return 0;
}
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