mirror of
https://github.com/dborth/fceugx.git
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672 lines
18 KiB
C
672 lines
18 KiB
C
/****************************************************************************
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* FCE Ultra 0.98.12
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* Nintendo Wii/Gamecube Port
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*
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* Tantric September 2008
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*
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* gcunzip.h
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*
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* Unzip routines
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****************************************************************************/
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#include <gccore.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <zlib.h>
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#include "fceuconfig.h"
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#include "dvd.h"
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#include "smbop.h"
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#include "fileop.h"
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#include "menudraw.h"
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#include "gcunzip.h"
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/*
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* PKWare Zip Header - adopted into zip standard
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*/
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#define MAXROM 0x500000
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#define ZIPCHUNK 2048
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/*
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* Zip files are stored little endian
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* Support functions for short and int types
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*/
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u32
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FLIP32 (u32 b)
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{
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unsigned int c;
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c = (b & 0xff000000) >> 24;
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c |= (b & 0xff0000) >> 8;
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c |= (b & 0xff00) << 8;
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c |= (b & 0xff) << 24;
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return c;
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}
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u16
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FLIP16 (u16 b)
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{
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u16 c;
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c = (b & 0xff00) >> 8;
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c |= (b & 0xff) << 8;
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return c;
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}
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/****************************************************************************
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* IsZipFile
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*
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* Returns 1 when Zip signature is found
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* Returns 2 when 7z signature is found
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****************************************************************************/
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int
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IsZipFile (char *buffer)
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{
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unsigned int *check;
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check = (unsigned int *) buffer;
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if (check[0] == 0x504b0304) // ZIP file
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return 1;
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// 7z signature
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static Byte Signature[6] = {'7', 'z', 0xBC, 0xAF, 0x27, 0x1C};
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int i;
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for(i = 0; i < 6; i++)
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if(buffer[i] != Signature[i])
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return 0;
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return 2; // 7z archive found
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}
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/*****************************************************************************
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* unzip
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*
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* It should be noted that there is a limit of 5MB total size for any ROM
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******************************************************************************/
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FILE* fatfile; // FAT
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u64 discoffset; // DVD
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SMBFILE smbfile; // SMB
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int
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UnZipBuffer (unsigned char *outbuffer, short where)
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{
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PKZIPHEADER pkzip;
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int zipoffset = 0;
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int zipchunk = 0;
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char out[ZIPCHUNK];
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z_stream zs;
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int res;
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int bufferoffset = 0;
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int readoffset = 0;
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int have = 0;
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char readbuffer[ZIPCHUNK];
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char msg[128];
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/*** Read Zip Header ***/
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switch (where)
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{
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case 0: // SD Card
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fseek(fatfile, 0, SEEK_SET);
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fread (readbuffer, 1, ZIPCHUNK, fatfile);
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break;
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case 1: // DVD
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dvd_read (readbuffer, ZIPCHUNK, discoffset);
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break;
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case 2: // From SMB
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SMB_ReadFile(readbuffer, ZIPCHUNK, 0, smbfile);
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break;
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}
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/*** Copy PKZip header to local, used as info ***/
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memcpy (&pkzip, readbuffer, sizeof (PKZIPHEADER));
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pkzip.uncompressedSize = FLIP32 (pkzip.uncompressedSize);
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sprintf (msg, "Unzipping %d bytes ... Wait",
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pkzip.uncompressedSize);
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ShowAction (msg);
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/*** Prepare the zip stream ***/
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memset (&zs, 0, sizeof (z_stream));
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zs.zalloc = Z_NULL;
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zs.zfree = Z_NULL;
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zs.opaque = Z_NULL;
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zs.avail_in = 0;
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zs.next_in = Z_NULL;
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res = inflateInit2 (&zs, -MAX_WBITS);
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if (res != Z_OK)
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return 0;
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/*** Set ZipChunk for first pass ***/
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zipoffset =
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(sizeof (PKZIPHEADER) + FLIP16 (pkzip.filenameLength) +
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FLIP16 (pkzip.extraDataLength));
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zipchunk = ZIPCHUNK - zipoffset;
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/*** Now do it! ***/
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do
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{
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zs.avail_in = zipchunk;
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zs.next_in = (Bytef *) & readbuffer[zipoffset];
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/*** Now inflate until input buffer is exhausted ***/
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do
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{
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zs.avail_out = ZIPCHUNK;
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zs.next_out = (Bytef *) & out;
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res = inflate (&zs, Z_NO_FLUSH);
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if (res == Z_MEM_ERROR)
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{
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inflateEnd (&zs);
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return 0;
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}
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have = ZIPCHUNK - zs.avail_out;
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if (have)
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{
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/*** Copy to normal block buffer ***/
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memcpy (&outbuffer[bufferoffset], &out, have);
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bufferoffset += have;
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}
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}
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while (zs.avail_out == 0);
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/*** Readup the next 2k block ***/
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zipoffset = 0;
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zipchunk = ZIPCHUNK;
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switch (where)
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{
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case 0: // SD Card
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fread (readbuffer, 1, ZIPCHUNK, fatfile);
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break;
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case 1: // DVD
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readoffset += ZIPCHUNK;
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dvd_read (readbuffer, ZIPCHUNK, discoffset+readoffset);
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break;
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case 2: // From SMB
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readoffset += ZIPCHUNK;
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SMB_ReadFile(readbuffer, ZIPCHUNK, readoffset, smbfile);
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break;
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}
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}
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while (res != Z_STREAM_END);
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inflateEnd (&zs);
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if (res == Z_STREAM_END)
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{
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if (pkzip.uncompressedSize == (u32) bufferoffset)
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return bufferoffset;
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else
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return pkzip.uncompressedSize;
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}
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return 0;
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}
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// Reading from FAT
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int
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UnZipFATFile (unsigned char *outbuffer, FILE* infile)
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{
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fatfile = infile;
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return UnZipBuffer(outbuffer, 0);
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}
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// Reading from DVD
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int
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UnZipDVDFile (unsigned char *outbuffer, u64 inoffset)
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{
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discoffset = inoffset;
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return UnZipBuffer(outbuffer, 1);
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}
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// Reading from SMB
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int
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UnZipSMBFile (unsigned char *outbuffer, SMBFILE infile)
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{
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smbfile = infile;
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return UnZipBuffer(outbuffer, 2);
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}
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/****************************************************************************
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* GetFirstZipFilename
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*
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* Returns the filename of the first file in the zipped archive
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* The idea here is to do the least amount of work required
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***************************************************************************/
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char *
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GetFirstZipFilename (int method)
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{
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char testbuffer[ZIPCHUNK];
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// read start of ZIP
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switch (method)
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{
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case METHOD_SD: // SD Card
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case METHOD_USB: // USB
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LoadFATFile (testbuffer, ZIPCHUNK);
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break;
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case METHOD_DVD: // DVD
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LoadDVDFile ((unsigned char *)testbuffer, ZIPCHUNK);
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break;
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case METHOD_SMB: // From SMB
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LoadSMBFile (testbuffer, ZIPCHUNK);
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break;
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}
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testbuffer[28] = 0; // truncate - filename length is 2 bytes long (bytes 26-27)
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int namelength = testbuffer[26]; // filename length starts 26 bytes in
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char * firstFilename = &testbuffer[30]; // first filename of a ZIP starts 31 bytes in
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firstFilename[namelength] = 0; // truncate at filename length
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return firstFilename;
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}
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/*
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* 7-zip functions are below. Have to be written to work with above.
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*
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else if (selection == 0 && inSz == true) {
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rootdir = filelist[1].offset;
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rootdirlength = filelist[1].length;
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offset = 0;
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maxfiles = parsedir();
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inSz = false;
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SzClose();
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}
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else if (inSz == false && SzDvdIsArchive(filelist[selection].offset) == SZ_OK) {
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// parse the 7zip file
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ShowAction("Found 7z");
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SzParse();
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if(SzRes == SZ_OK) {
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inSz = true;
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offset = selection = 0;
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} else {
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SzDisplayError(SzRes);
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}
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}
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else if (inSz == true) {
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// extract the selected ROM from the 7zip file to the buffer
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if(SzExtractROM(filelist[selection].offset, nesrom) == true) {
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haverom = 1;
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inSz = false;
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// go one directory up
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rootdir = filelist[1].offset;
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rootdirlength = filelist[1].length;
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offset = selection = 0;
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maxfiles = parsedir();
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}
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}
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*/
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/*
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* 7-zip functions are below. Have to be written to work with above.
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#include "7zCrc.h"
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#include "7zIn.h"
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#include "7zExtract.h"
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typedef struct _SzFileInStream
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{
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ISzInStream InStream;
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u64 offset; // offset of the file
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unsigned int len; // length of the file
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u64 pos; // current position of the file pointer
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} SzFileInStream;
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// 7zip error list
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char szerrormsg[][30] = {
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"7z: Data error",
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"7z: Out of memory",
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"7z: CRC Error",
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"7z: Not implemented",
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"7z: Fail",
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"7z: Archive error"
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};
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SZ_RESULT SzRes;
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SzFileInStream SzArchiveStream;
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CArchiveDatabaseEx SzDb;
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ISzAlloc SzAllocImp;
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ISzAlloc SzAllocTempImp;
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UInt32 SzBlockIndex = 0xFFFFFFFF;
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size_t SzBufferSize;
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size_t SzOffset;
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size_t SzOutSizeProcessed;
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CFileItem *SzF;
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char sz_buffer[2048];
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// the GC's dvd drive only supports offsets and length which are a multiply of 32 bytes
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// additionally the max length of a read is 2048 bytes
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// this function removes these limitations
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// additionally the 7zip SDK does often read data in 1 byte parts from the DVD even when
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// it could read 32 bytes. the dvdsf_buffer has been added to avoid having to read the same sector
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// over and over again
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unsigned char dvdsf_buffer[DVD_SECTOR_SIZE];
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u64 dvdsf_last_offset = 0;
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u64 dvdsf_last_length = 0;
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int dvd_buffered_read(void *dst, u32 len, u64 offset) {
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int ret = 0;
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// only read data if the data inside dvdsf_buffer cannot be used
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if(offset != dvdsf_last_offset || len > dvdsf_last_length) {
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char msg[1024];
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sprintf(msg, "buff_read: len=%d, offset=%llX, UseSD=%d", len, offset, UseSDCARD);
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//WaitPrompt(msg);
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memset(&dvdsf_buffer, '\0', DVD_SECTOR_SIZE);
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if (UseSDCARD) {
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if (filehandle == NULL)
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GetSDInfo();
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fseek(filehandle, offset, SEEK_SET);
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fread(&dvdsf_buffer, len, 1, filehandle);
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} else if (!UseWiiSDCARD)
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ret = dvd_read(&dvdsf_buffer, len, offset);
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dvdsf_last_offset = offset;
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dvdsf_last_length = len;
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}
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memcpy(dst, &dvdsf_buffer, len);
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return ret;
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}
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int dvd_safe_read(void *dst_v, u32 len, u64 offset) {
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unsigned char buffer[DVD_SECTOR_SIZE]; // buffer for one dvd sector
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// if read size and length are a multiply of DVD_(OFFSET,LENGTH)_MULTIPLY and length < DVD_MAX_READ_LENGTH
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// we don't need to fix anything
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if(len % DVD_LENGTH_MULTIPLY == 0 && offset % DVD_OFFSET_MULTIPLY == 0 && len <= DVD_MAX_READ_LENGTH) {
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char msg[1024];
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sprintf(msg, "simple_safe_read: len=%d, offset=%llX, UseSD=%d", len, offset, UseSDCARD);
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//WaitPrompt(msg);
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int ret = dvd_buffered_read(buffer, len, offset);
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memcpy(dst_v, &buffer, len);
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return ret;
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} else {
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char msg[1024];
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sprintf(msg, "complex_safe_read: len=%d, offset=%llX, UseSD=%d", len, offset, UseSDCARD);
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//WaitPrompt(msg);
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// no errors yet -> ret = 0
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// the return value of dvd_read will be OR'd with ret
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// because dvd_read does return 1 on error and 0 on success and
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// because 0 | 1 = 1 ret will also contain 1 if at least one error
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// occured and 0 otherwise ;)
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int ret = 0; // return value of dvd_read
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// we might need to fix all 3 issues
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unsigned char *dst = (unsigned char *)dst_v; // gcc will not allow to use var[num] on void* types
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u64 bytesToRead; // the number of bytes we still need to read & copy to the output buffer
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u64 currentOffset; // the current dvd offset
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u64 bufferOffset; // the current buffer offset
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u64 i, j, k; // temporary variables which might be used for different stuff
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// unsigned char buffer[DVD_SECTOR_SIZE]; // buffer for one dvd sector
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currentOffset = offset;
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bytesToRead = len;
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bufferOffset = 0;
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// fix first issue (offset is not a multiply of 32)
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if(offset % DVD_OFFSET_MULTIPLY) {
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// calcualte offset of the prior 32 byte position
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i = currentOffset - (currentOffset % DVD_OFFSET_MULTIPLY);
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// calculate the offset from which the data of the dvd buffer will be copied
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j = currentOffset % DVD_OFFSET_MULTIPLY;
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// calculate the number of bytes needed to reach the next DVD_OFFSET_MULTIPLY byte mark
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k = DVD_OFFSET_MULTIPLY - j;
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// maybe we'll only need to copy a few bytes and we therefore don't even reach the next sector
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if(k > len) {
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k = len;
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}
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// read 32 bytes from the last 32 byte position
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ret |= dvd_buffered_read(buffer, DVD_OFFSET_MULTIPLY, i);
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// copy the bytes to the output buffer and update currentOffset, bufferOffset and bytesToRead
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memcpy(&dst[bufferOffset], &buffer[j], k);
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currentOffset += k;
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bufferOffset += k;
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bytesToRead -= k;
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}
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// fix second issue (more than 2048 bytes are needed)
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if(bytesToRead > DVD_MAX_READ_LENGTH) {
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// calculate the number of 2048 bytes sector needed to get all data
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i = (bytesToRead - (bytesToRead % DVD_MAX_READ_LENGTH)) / DVD_MAX_READ_LENGTH;
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// read data in 2048 byte sector
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for(j = 0; j < i; j++) {
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ret |= dvd_buffered_read(buffer, DVD_MAX_READ_LENGTH, currentOffset); // read sector
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memcpy(&dst[bufferOffset], buffer, DVD_MAX_READ_LENGTH); // copy to output buffer
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// update currentOffset, bufferOffset and bytesToRead
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currentOffset += DVD_MAX_READ_LENGTH;
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bufferOffset += DVD_MAX_READ_LENGTH;
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bytesToRead -= DVD_MAX_READ_LENGTH;
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}
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}
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// fix third issue (length is not a multiply of 32)
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if(bytesToRead) {
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ret |= dvd_buffered_read(buffer, DVD_MAX_READ_LENGTH, currentOffset); // read 32 byte from the dvd
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memcpy(&dst[bufferOffset], buffer, bytesToRead); // copy bytes to output buffer
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}
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//free(tmp);
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return ret;
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}
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}
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// function used by the 7zip SDK to read data from the DVD (fread)
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SZ_RESULT SzDvdFileReadImp(void *object, void **buffer, size_t maxRequiredSize, size_t *processedSize)
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{
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// the void* object is a SzFileInStream
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SzFileInStream *s = (SzFileInStream *)object;
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// calculate dvd sector offset
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u64 offset = (u64)(s->offset + s->pos);
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if(maxRequiredSize > 2048)
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{
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maxRequiredSize = 2048;
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}
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// read data
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dvd_safe_read(sz_buffer, maxRequiredSize, offset);
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*buffer = sz_buffer;
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*processedSize = maxRequiredSize;
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s->pos += *processedSize;
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return SZ_OK;
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}
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// function used by the 7zip SDK to change the filepointer (fseek(object, pos, SEEK_SET))
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SZ_RESULT SzDvdFileSeekImp(void *object, CFileSize pos)
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{
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// the void* object is a SzFileInStream
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SzFileInStream *s = (SzFileInStream *)object;
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// check if the 7z SDK wants to move the pointer to somewhere after the EOF
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if(pos >= s->len)
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{
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WaitPrompt("7z Error: The 7z SDK wants to start reading somewhere behind the EOF...");
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return SZE_FAIL;
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}
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// save new position and return
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s->pos = pos;
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return SZ_OK;
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}
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SZ_RESULT SzDvdIsArchive(u64 dvd_offset) {
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// 7z signautre
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static Byte Signature[6] = {'7', 'z', 0xBC, 0xAF, 0x27, 0x1C};
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Byte Candidate[6];
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// read the data from the DVD
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int res = dvd_safe_read (&Candidate, 6, dvd_offset);
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char msg[1024];
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size_t i;
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for(i = 0; i < 6; i++) {
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if(Candidate[i] != Signature[i]) {
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return SZE_FAIL;
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}
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}
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return SZ_OK;
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}
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// display an error message
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void SzDisplayError(SZ_RESULT res)
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{
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WaitPrompt(szerrormsg[(res - 1)]);
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}
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|
|
static u64 rootdir;
|
|
static int rootdirlength;
|
|
|
|
void SzParse(void) {
|
|
// save the offset and the length of this file inside the archive stream structure
|
|
SzArchiveStream.offset = filelist[selection].offset;
|
|
SzArchiveStream.len = filelist[selection].length;
|
|
SzArchiveStream.pos = 0;
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|
|
|
// set handler functions for reading data from DVD and setting the position
|
|
SzArchiveStream.InStream.Read = SzDvdFileReadImp;
|
|
SzArchiveStream.InStream.Seek = SzDvdFileSeekImp;
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|
|
// set default 7Zip SDK handlers for allocation and freeing memory
|
|
SzAllocImp.Alloc = SzAlloc;
|
|
SzAllocImp.Free = SzFree;
|
|
SzAllocTempImp.Alloc = SzAllocTemp;
|
|
SzAllocTempImp.Free = SzFreeTemp;
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|
|
// prepare CRC and 7Zip database structures
|
|
InitCrcTable();
|
|
SzArDbExInit(&SzDb);
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|
|
|
// open the archive
|
|
SzRes = SzArchiveOpen(&SzArchiveStream.InStream, &SzDb, &SzAllocImp, &SzAllocTempImp);
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|
|
|
if(SzRes != SZ_OK)
|
|
{
|
|
// free memory used by the 7z SDK
|
|
SzArDbExFree(&SzDb, SzAllocImp.Free);
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
// archive opened successfully
|
|
|
|
// erase all previous entries
|
|
memset(&filelist, 0, sizeof(FILEENTRIES) * MAXFILES);
|
|
|
|
// add '../' folder
|
|
strncpy(filelist[0].filename, "../", 3);
|
|
filelist[0].length = rootdirlength; // store rootdir in case the user wants to go one folder up
|
|
filelist[0].offset = rootdir; // -''- rootdir length -''-
|
|
filelist[0].flags = 0;
|
|
|
|
// get contents and parse them into the dvd file list structure
|
|
unsigned int SzI, SzJ;
|
|
SzJ = 1;
|
|
for(SzI = 0; SzI < SzDb.Database.NumFiles; SzI++)
|
|
{
|
|
SzF = SzDb.Database.Files + SzI;
|
|
|
|
// skip directories
|
|
if(SzF->IsDirectory)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
// do not exceed MAXFILES to avoid possible buffer overflows
|
|
if(SzJ == (MAXFILES - 1))
|
|
{
|
|
break;
|
|
}
|
|
|
|
// parse information about this file to the dvd file list structure
|
|
strncpy(filelist[SzJ].filename, SzF->Name, MAXJOLIET); // copy joliet name (useless...)
|
|
filelist[SzJ].filename[MAXJOLIET] = 0; // terminate string
|
|
filelist[SzJ].length = SzF->Size; // filesize
|
|
filelist[SzJ].offset = SzI; // the extraction function identifies the file with this number
|
|
filelist[SzJ].flags = 0; // only files will be displayed (-> no flags)
|
|
SzJ++;
|
|
}
|
|
|
|
// update maxfiles and select the first entry
|
|
maxfiles = SzJ;
|
|
offset = selection = 0;
|
|
return;
|
|
}
|
|
}
|
|
|
|
void SzClose(void)
|
|
{
|
|
SzArDbExFree(&SzDb, SzAllocImp.Free);
|
|
}
|
|
|
|
bool SzExtractROM(int i, unsigned char *buffer)
|
|
{
|
|
|
|
// prepare some variables
|
|
SzBlockIndex = 0xFFFFFFFF;
|
|
SzOffset = 0;
|
|
|
|
// Unzip the file
|
|
//ShowAction("Un7zipping file. Please wait...");
|
|
WaitPrompt("Un7zipping file. Please wait...");
|
|
SzRes = SzExtract2(
|
|
&SzArchiveStream.InStream,
|
|
&SzDb,
|
|
i, // index of file
|
|
&SzBlockIndex, // index of solid block
|
|
&buffer,
|
|
&SzBufferSize,
|
|
&SzOffset, // offset of stream for required file in *outBuffer
|
|
&SzOutSizeProcessed, // size of file in *outBuffer
|
|
&SzAllocImp,
|
|
&SzAllocTempImp);
|
|
|
|
// check for errors
|
|
if(SzRes != SZ_OK)
|
|
{
|
|
// display error message
|
|
WaitPrompt(szerrormsg[(SzRes - 1)]);
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
// close 7Zip archive and free memory
|
|
SzArDbExFree(&SzDb, SzAllocImp.Free);
|
|
return true;
|
|
}
|
|
}
|
|
*/
|