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/**
* Navit, a modular navigation system.
* Copyright (C) 2005-2008 Navit Team
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* 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., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <zlib.h>
#include <string.h>
#include <stdlib.h>
#include "maptool.h"
#include "zipfile.h"
static int
compress2_int(Byte *dest, uLongf *destLen, const Bytef *source, uLong sourceLen, int level)
{
z_stream stream;
int err;
stream.next_in = (Bytef*)source;
stream.avail_in = (uInt)sourceLen;
stream.next_out = 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;
stream.opaque = (voidpf)0;
err = deflateInit2(&stream, level, Z_DEFLATED, -15, 9, Z_DEFAULT_STRATEGY);
if (err != Z_OK) return err;
err = deflate(&stream, Z_FINISH);
if (err != Z_STREAM_END) {
deflateEnd(&stream);
return err == Z_OK ? Z_BUF_ERROR : err;
}
*destLen = stream.total_out;
err = deflateEnd(&stream);
return err;
}
void
write_zipmember(struct zip_info *zip_info, char *name, int filelen, char *data, int data_size)
{
struct zip_lfh lfh = {
0x04034b50,
0x0a,
0x0,
0x0,
zip_info->time,
zip_info->date,
0x0,
0x0,
0x0,
filelen,
0x0,
};
struct zip_cd cd = {
0x02014b50,
0x17,
0x00,
0x0a,
0x00,
0x0000,
0x0,
zip_info->time,
zip_info->date,
0x0,
0x0,
0x0,
filelen,
0x0000,
0x0000,
0x0000,
0x0000,
0x0,
zip_info->offset,
};
struct zip_cd_ext cd_ext = {
0x1,
0x8,
zip_info->offset,
};
char filename[filelen+1];
int error,crc,len,comp_size=data_size;
uLongf destlen=data_size+data_size/500+12;
char *compbuffer;
compbuffer = malloc(destlen);
if (!compbuffer) {
fprintf(stderr, "No more memory.\n");
exit (1);
}
crc=crc32(0, NULL, 0);
crc=crc32(crc, (unsigned char *)data, data_size);
#ifdef HAVE_ZLIB
if (zip_info->compression_level) {
error=compress2_int((Byte *)compbuffer, &destlen, (Bytef *)data, data_size, zip_info->compression_level);
if (error == Z_OK) {
if (destlen < data_size) {
data=compbuffer;
comp_size=destlen;
}
} else {
fprintf(stderr,"compress2 returned %d\n", error);
}
}
#endif
lfh.zipcrc=crc;
lfh.zipsize=comp_size;
lfh.zipuncmp=data_size;
lfh.zipmthd=zip_info->compression_level ? 8:0;
cd.zipccrc=crc;
cd.zipcsiz=comp_size;
cd.zipcunc=data_size;
cd.zipcmthd=zip_info->compression_level ? 8:0;
if (zip_info->zip64) {
cd.zipofst=0xffffffff;
cd.zipcxtl=sizeof(cd_ext);
}
strcpy(filename, name);
len=strlen(filename);
while (len < filelen) {
filename[len++]='_';
}
filename[filelen]='\0';
fwrite(&lfh, sizeof(lfh), 1, zip_info->res);
fwrite(filename, filelen, 1, zip_info->res);
fwrite(data, comp_size, 1, zip_info->res);
zip_info->offset+=sizeof(lfh)+filelen+comp_size;
fwrite(&cd, sizeof(cd), 1, zip_info->dir);
fwrite(filename, filelen, 1, zip_info->dir);
zip_info->dir_size+=sizeof(cd)+filelen;
if (zip_info->zip64) {
fwrite(&cd_ext, sizeof(cd_ext), 1, zip_info->dir);
zip_info->dir_size+=sizeof(cd_ext);
}
free(compbuffer);
}
void
zip_write_index(struct zip_info *info)
{
int size=ftell(info->index);
char buffer[size];
fseek(info->index, 0, SEEK_SET);
fread(buffer, size, 1, info->index);
write_zipmember(info, "index", strlen("index"), buffer, size);
info->zipnum++;
}
int
zip_write_directory(struct zip_info *info)
{
struct zip_eoc eoc = {
0x06054b50,
0x0000,
0x0000,
0x0000,
0x0000,
0x0,
0x0,
0x0,
};
fseek(info->dir, 0, SEEK_SET);
cat(info->dir, info->res);
eoc.zipenum=info->zipnum;
eoc.zipecenn=info->zipnum;
eoc.zipecsz=info->dir_size;
eoc.zipeofst=info->offset;
fwrite(&eoc, sizeof(eoc), 1, info->res);
sig_alrm(0);
#ifndef _WIN32
alarm(0);
#endif
return 0;
}
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