mirror of
https://github.com/wiidev/usbloadergx.git
synced 2024-11-12 22:45:08 +01:00
350 lines
11 KiB
C
350 lines
11 KiB
C
/*
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Additional tools for Minizip
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Code: Xavier Roche '2004
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License: Same as ZLIB (www.gzip.org)
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*/
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/* Code */
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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 "unzip.h"
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#define READ_8(adr) ((unsigned char)*(adr))
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#define READ_16(adr) ( READ_8(adr) | (READ_8(adr+1) << 8) )
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#define READ_32(adr) ( READ_16(adr) | (READ_16((adr)+2) << 16) )
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#define WRITE_8(buff, n) do { \
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*((unsigned char*)(buff)) = (unsigned char) ((n) & 0xff); \
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} while(0)
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#define WRITE_16(buff, n) do { \
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WRITE_8((unsigned char*)(buff), n); \
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WRITE_8(((unsigned char*)(buff)) + 1, (n) >> 8); \
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} while(0)
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#define WRITE_32(buff, n) do { \
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WRITE_16((unsigned char*)(buff), (n) & 0xffff); \
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WRITE_16((unsigned char*)(buff) + 2, (n) >> 16); \
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} while(0)
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extern int ZEXPORT unzRepair( file, fileOut, fileOutTmp, nRecovered, bytesRecovered )
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const char* file;
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const char* fileOut;
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const char* fileOutTmp;
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uLong* nRecovered;
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uLong* bytesRecovered;
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{
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int err = Z_OK;
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FILE* fpZip = fopen( file, "rb" );
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FILE* fpOut = fopen( fileOut, "wb" );
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FILE* fpOutCD = fopen( fileOutTmp, "wb" );
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if ( fpZip != NULL && fpOut != NULL )
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{
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int entries = 0;
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uLong totalBytes = 0;
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char header[30];
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char filename[256];
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char extra[1024];
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int offset = 0;
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int offsetCD = 0;
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while ( fread( header, 1, 30, fpZip ) == 30 )
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{
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int currentOffset = offset;
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/* File entry */
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if ( READ_32( header ) == 0x04034b50 )
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{
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unsigned int version = READ_16( header + 4 );
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unsigned int gpflag = READ_16( header + 6 );
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unsigned int method = READ_16( header + 8 );
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unsigned int filetime = READ_16( header + 10 );
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unsigned int filedate = READ_16( header + 12 );
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unsigned int crc = READ_32( header + 14 ); /* crc */
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unsigned int cpsize = READ_32( header + 18 ); /* compressed size */
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unsigned int uncpsize = READ_32( header + 22 ); /* uncompressed sz */
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unsigned int fnsize = READ_16( header + 26 ); /* file name length */
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unsigned int extsize = READ_16( header + 28 ); /* extra field length */
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filename[0] = extra[0] = '\0';
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/* Header */
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if ( fwrite( header, 1, 30, fpOut ) == 30 )
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{
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offset += 30;
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}
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else
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{
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err = Z_ERRNO;
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break;
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}
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/* Filename */
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if ( fnsize > 0 )
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{
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if ( fread( filename, 1, fnsize, fpZip ) == fnsize )
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{
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if ( fwrite( filename, 1, fnsize, fpOut ) == fnsize )
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{
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offset += fnsize;
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}
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else
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{
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err = Z_ERRNO;
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break;
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}
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}
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else
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{
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err = Z_ERRNO;
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break;
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}
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}
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else
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{
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err = Z_STREAM_ERROR;
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break;
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}
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/* Extra field */
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if ( extsize > 0 )
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{
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if ( fread( extra, 1, extsize, fpZip ) == extsize )
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{
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if ( fwrite( extra, 1, extsize, fpOut ) == extsize )
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{
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offset += extsize;
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}
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else
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{
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err = Z_ERRNO;
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break;
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}
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}
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else
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{
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err = Z_ERRNO;
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break;
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}
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}
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/* Data */
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{
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int dataSize = cpsize;
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if ( dataSize == 0 )
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{
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dataSize = uncpsize;
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}
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if ( dataSize > 0 )
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{
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char* data = malloc( dataSize );
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if ( data != NULL )
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{
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if ( ( int )fread( data, 1, dataSize, fpZip ) == dataSize )
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{
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if ( ( int )fwrite( data, 1, dataSize, fpOut ) == dataSize )
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{
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offset += dataSize;
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totalBytes += dataSize;
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}
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else
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{
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err = Z_ERRNO;
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}
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}
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else
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{
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err = Z_ERRNO;
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}
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free( data );
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if ( err != Z_OK )
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{
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break;
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}
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}
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else
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{
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err = Z_MEM_ERROR;
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break;
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}
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}
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}
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/* Central directory entry */
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{
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char header[46];
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char* comment = "";
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int comsize = ( int ) strlen( comment );
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WRITE_32( header, 0x02014b50 );
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WRITE_16( header + 4, version );
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WRITE_16( header + 6, version );
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WRITE_16( header + 8, gpflag );
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WRITE_16( header + 10, method );
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WRITE_16( header + 12, filetime );
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WRITE_16( header + 14, filedate );
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WRITE_32( header + 16, crc );
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WRITE_32( header + 20, cpsize );
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WRITE_32( header + 24, uncpsize );
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WRITE_16( header + 28, fnsize );
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WRITE_16( header + 30, extsize );
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WRITE_16( header + 32, comsize );
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WRITE_16( header + 34, 0 ); /* disk # */
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WRITE_16( header + 36, 0 ); /* int attrb */
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WRITE_32( header + 38, 0 ); /* ext attrb */
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WRITE_32( header + 42, currentOffset );
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/* Header */
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if ( fwrite( header, 1, 46, fpOutCD ) == 46 )
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{
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offsetCD += 46;
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/* Filename */
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if ( fnsize > 0 )
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{
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if ( fwrite( filename, 1, fnsize, fpOutCD ) == fnsize )
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{
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offsetCD += fnsize;
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}
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else
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{
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err = Z_ERRNO;
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break;
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}
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}
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else
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{
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err = Z_STREAM_ERROR;
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break;
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}
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/* Extra field */
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if ( extsize > 0 )
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{
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if ( fwrite( extra, 1, extsize, fpOutCD ) == extsize )
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{
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offsetCD += extsize;
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}
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else
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{
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err = Z_ERRNO;
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break;
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}
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}
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/* Comment field */
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if ( comsize > 0 )
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{
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if ( ( int )fwrite( comment, 1, comsize, fpOutCD ) == comsize )
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{
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offsetCD += comsize;
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}
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else
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{
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err = Z_ERRNO;
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break;
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}
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}
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}
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else
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{
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err = Z_ERRNO;
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break;
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}
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}
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/* Success */
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entries++;
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}
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else
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{
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break;
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}
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}
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/* Final central directory */
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{
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int entriesZip = entries;
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char header[22];
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char* comment = ""; // "ZIP File recovered by zlib/minizip/mztools";
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int comsize = ( int ) strlen( comment );
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if ( entriesZip > 0xffff )
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{
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entriesZip = 0xffff;
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}
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WRITE_32( header, 0x06054b50 );
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WRITE_16( header + 4, 0 ); /* disk # */
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WRITE_16( header + 6, 0 ); /* disk # */
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WRITE_16( header + 8, entriesZip ); /* hack */
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WRITE_16( header + 10, entriesZip ); /* hack */
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WRITE_32( header + 12, offsetCD ); /* size of CD */
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WRITE_32( header + 16, offset ); /* offset to CD */
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WRITE_16( header + 20, comsize ); /* comment */
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/* Header */
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if ( fwrite( header, 1, 22, fpOutCD ) == 22 )
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{
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/* Comment field */
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if ( comsize > 0 )
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{
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if ( ( int )fwrite( comment, 1, comsize, fpOutCD ) != comsize )
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{
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err = Z_ERRNO;
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}
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}
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}
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else
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{
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err = Z_ERRNO;
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}
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}
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/* Final merge (file + central directory) */
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fclose( fpOutCD );
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if ( err == Z_OK )
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{
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fpOutCD = fopen( fileOutTmp, "rb" );
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if ( fpOutCD != NULL )
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{
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int nRead;
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char buffer[8192];
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while ( ( nRead = ( int )fread( buffer, 1, sizeof( buffer ), fpOutCD ) ) > 0 )
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{
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if ( ( int )fwrite( buffer, 1, nRead, fpOut ) != nRead )
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{
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err = Z_ERRNO;
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break;
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}
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}
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fclose( fpOutCD );
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}
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}
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/* Close */
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fclose( fpZip );
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fclose( fpOut );
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/* Wipe temporary file */
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( void )remove( fileOutTmp );
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/* Number of recovered entries */
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if ( err == Z_OK )
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{
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if ( nRecovered != NULL )
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{
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*nRecovered = entries;
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}
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if ( bytesRecovered != NULL )
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{
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*bytesRecovered = totalBytes;
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}
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}
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}
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else
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{
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err = Z_STREAM_ERROR;
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}
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return err;
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}
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