#include "stdafx.h"
#include "ZipTool.h"
#include "zlib/zlib.h"
#include "kiutil.h"
#include "kilib/kilib.h"
bool CZipTool::Extract( const char* aname, const char* dll, kiPath& dll_rel_path )
{
ZipLocalHeader hdr;
if( !(zip=fopen(aname,"rb")) )
return false;
while( doHeader( &hdr ) )
{
unsigned long posnext = ftell( zip ) + hdr.csz;
char* name;
if( out=fopen( name=kiutil::pathMake(hdr.fnm),"wb") )
{
if( 0==strcmpi( kiPath::name(name), dll ) ) // DLLの位置を記憶
dll_rel_path = name;
// 展開！
switch( hdr.mhd )
{
case Stored: Unstore( hdr.usz, hdr.csz ); break;
case Deflated: Inflate( hdr.usz, hdr.csz ); break;
}
// 事後処理
fclose( out );
kiutil::timeSet( name,
(WORD)(hdr.dat),(WORD)(hdr.tim));
}
fseek( zip, posnext, SEEK_SET );
}
fclose( zip );
return true;
}
//---- CRC 関係 ---------------------
// make crc table
//static void zip_make_crc_table()
//{
// for( DWORD c,n=0; n!=256; n++ )
// {
// c = n;
// for( DWORD k=8; k; k-- )
// c = (c&1) ? ((0xedb88320L)^(c>>1)) : (c>>1);
// crc_table[n] = c;
// }
//}
// the result
static DWORD crc_table[256] = {
0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
};
// update crc
#define calc_crc(c,b) (crc_table[(c&0xff)^(b&0xff)]^((c)>>8))
DWORD CZipTool::crc32( DWORD crc, const BYTE* dat, int len )
{
crc ^= 0xffffffffL;
while( len-- )
crc = calc_crc( crc,*dat++ );
return (crc^0xffffffffL);
}
//-- ヘッダ処理 -----------------------------------
bool CZipTool::read_header( ZipLocalHeader* hdr )
{
unsigned char* buf = new unsigned char[65536];
if( 26 != fread(buf,1,26,zip) )
{ delete [] buf; return false; }
hdr->ver = ((buf[ 0])|(buf[ 1]<<8));
hdr->flg = ((buf[ 2])|(buf[ 3]<<8));
hdr->mhd = ((buf[ 4])|(buf[ 5]<<8));
hdr->tim = ((buf[ 6])|(buf[ 7]<<8));
hdr->dat = ((buf[ 8])|(buf[ 9]<<8));
hdr->crc = ((buf[10])|(buf[11]<<8)|(buf[12]<<16)|(buf[13]<<24));
hdr->csz = ((buf[14])|(buf[15]<<8)|(buf[16]<<16)|(buf[17]<<24));
hdr->usz = ((buf[18])|(buf[19]<<8)|(buf[20]<<16)|(buf[21]<<24));
hdr->fnl = ((buf[22])|(buf[23]<<8));
hdr->exl = ((buf[24])|(buf[25]<<8));
if( hdr->fnl!=fread(buf,1,hdr->fnl,zip) )
{ delete [] buf; return false; }
int l = (hdr->fnl>MAX_PATH-1)?(MAX_PATH-1):(hdr->fnl);
memcpy( hdr->fnm, buf, l );
hdr->fnm[l]='\0';
char* pp;
for( pp=hdr->fnm; *pp!=0; pp++ );
if( hdr->mhd > Deflated || hdr->mhd==Tokenized )
{ delete [] buf; return false; }
if( pp-hdr->fnm != l )
{ delete [] buf; return false; }
if( hdr->exl != fread(buf,1,hdr->exl,zip) )
{ delete [] buf; return false; }
delete [] buf;
return true;
}
bool CZipTool::doHeader( ZipLocalHeader* hdr )
{
int c, stage=0;
while( EOF != (c=fgetc(zip)) )
{
if( c=='P' ) stage++;
else if( c=='K' && stage==1 ) stage++;
else if( c==0x03 && stage==2 ) stage++;
else if( c==0x04 && stage==3 )
{
stage++;
int x=ftell(zip);
if( read_header( hdr ) )
return true;
fseek( zip,x,SEEK_SET );
}
else stage=0;
}
return false;
}
////////////////////////////////////////////////////////////////
// Store : 無圧縮格納
////////////////////////////////////////////////////////////////
void CZipTool::Unstore( DWORD usz, DWORD csz )
{
unsigned char* buf = new unsigned char[65536];
//--------------------------------------------------------------------//
int how_much;
while( csz )
{
how_much = csz > 65536 ? 65536 : csz;
if( 0>=(how_much=zipread( buf, how_much )) )
break;
zipwrite( buf, how_much );
csz -= how_much;
}
delete [] buf;
}
////////////////////////////////////////////////////////////////
// Deflate ： lzss+huffman。現在のpkzipのメソッド
////////////////////////////////////////////////////////////////
static void* my_zalloc(void* prm,UINT num,UINT siz)
{return (void*)new char[num*siz];}
static void my_zfree(void* prm,void* ptr)
{delete [] (char*)ptr;}
void CZipTool::Inflate( DWORD usz, DWORD csz )
{
unsigned char* outbuf = new unsigned char[65536];
unsigned char* inbuf = outbuf + 32768;
//--------------------------------------------------------------------//
// zlib準備
z_stream_s zs;
zs.zalloc = my_zalloc;
zs.zfree = my_zfree;
// 出力バッファ
int outsiz = 32768;
zs.next_out = outbuf;
zs.avail_out= outsiz;
// 入力バッファ
int insiz = zipread( inbuf,
32768 > csz ? csz : 32768 );
if( insiz<=0 )
return;
csz -= insiz;
zs.next_in = inbuf;
zs.avail_in = insiz;
// スタート
inflateInit2( &zs, -15 );
// 書庫から入力し終わるまでループ
int err = Z_OK;
while( csz )
{
while( zs.avail_out > 0 )
{
err = inflate( &zs,Z_PARTIAL_FLUSH );
if( err!=Z_STREAM_END && err!=Z_OK )
csz=0;
if( !csz )
break;
if( zs.avail_in<=0 )
{
int insiz = zipread( inbuf, 32768 > csz ?
csz : 32768 );
if( insiz<=0 )
{
err = Z_STREAM_END;
csz = 0;
break;
}
csz -= insiz;
zs.next_in = inbuf;
zs.avail_in = insiz;
}
}
zipwrite( outbuf, outsiz-zs.avail_out );
zs.next_out = outbuf;
zs.avail_out = outsiz;
}
// 出力残しを無くす。
while( err!=Z_STREAM_END )
{
err = inflate(&zs,Z_PARTIAL_FLUSH);
if( err!=Z_STREAM_END && err!=Z_OK )
break;
zipwrite( outbuf, outsiz-zs.avail_out );
zs.next_out = outbuf;
zs.avail_out = outsiz;
}
// 終了
inflateEnd(&zs);
delete [] outbuf;
}