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mpv/unrarlib.c
diego 8caae24445 Mark unrarlib imported files as changed to comply with GPL §2a. 
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@15166 b3059339-0415-0410-9bf9-f77b7e298cf2
2005-04-15 18:48:03 +00:00

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/* ***************************************************************************
**
** This file is part of the UniquE RAR File Library.
**
** Copyright (C) 2000-2002 by Christian Scheurer (www.ChristianScheurer.ch)
** UNIX port copyright (c) 2000-2002 by Johannes Winkelmann (jw@tks6.net)
**
** Modified for use with MPlayer, detailed CVS changelog at
** http://www.mplayerhq.hu/cgi-bin/cvsweb.cgi/main/
** $Id$
**
** The contents of this file are subject to the UniquE RAR File Library
** License (the "unrarlib-license.txt"). You may not use this file except
** in compliance with the License. You may obtain a copy of the License
** at http://www.unrarlib.org/license.html.
** Software distributed under the License is distributed on an "AS IS"
** basis, WITHOUT WARRANTY OF ANY KIND, either express or implied warranty.
**
** Alternatively, the contents of this file may be used under the terms
** of the GNU General Public License Version 2 or later (the "GPL"), in
** which case the provisions of the GPL are applicable instead of those
** above. If you wish to allow use of your version of this file only
** under the terms of the GPL and not to allow others to use your version
** of this file under the terms of the UniquE RAR File Library License,
** indicate your decision by deleting the provisions above and replace
** them with the notice and other provisions required by the GPL. If you
** do not delete the provisions above, a recipient may use your version
** of this file under the terms of the GPL or the UniquE RAR File Library
** License.
**
************************************************************************** */
/* ***************************************************************************
**
** UniquE RAR File Library
** The free file lib for the demoscene
** multi-OS version (Win32, Linux and SunOS)
**
*****************************************************************************
**
** ==> Please configure the program in "unrarlib.h". <==
**
** RAR decompression code:
** (C) Eugene Roshal
** Modifications to a FileLib:
** (C) 2000-2002 Christian Scheurer aka. UniquE/Vantage (cs@unrarlib.org)
** Linux port:
** (C) 2000-2002 Johannes Winkelmann (jw@tks6.net)
**
** The UniquE RAR File Library gives you the ability to access RAR archives
** (any compression method supported in RAR v2.0 including Multimedia
** Compression and encryption) directly from your program with ease an by
** adding only 12kB (6kB UPX-compressed) additional code to your program.
** Both solid and normal (recommended for fast random access to the files!)
** archives are supported. This FileLib is made for the Demo scene, so it's
** designed for easy use within your demos and intros.
** Please read "licence.txt" to learn more about how you may use URARFileLib
** in your productions.
**
*****************************************************************************
**
** ==> see the "CHANGES" file to see what's new
**
************************************************************************** */
/* -- include files ------------------------------------------------------- */
#include "unrarlib.h" /* include global configuration */
/* ------------------------------------------------------------------------ */
/* -- global stuff -------------------------------------------------------- */
#ifdef _WIN_32
#include <windows.h> /* WIN32 definitions */
#include <stdio.h>
#include <string.h>
#define ENABLE_ACCESS
#define HOST_OS WIN_32
#define FM_NORMAL 0x00
#define FM_RDONLY 0x01
#define FM_HIDDEN 0x02
#define FM_SYSTEM 0x04
#define FM_LABEL 0x08
#define FM_DIREC 0x10
#define FM_ARCH 0x20
#define PATHDIVIDER "\\"
#define CPATHDIVIDER '\\'
#define MASKALL "*.*"
#define READBINARY "rb"
#define READTEXT "rt"
#define UPDATEBINARY "r+b"
#define CREATEBINARY "w+b"
#define CREATETEXT "w"
#define APPENDTEXT "at"
#endif
#ifdef _UNIX
#include <stdio.h> /* LINUX/UNIX definitions */
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#define ENABLE_ACCESS
#define HOST_OS UNIX
#define FM_LABEL 0x0000
#define FM_DIREC 0x4000
#define PATHDIVIDER "/"
#define CPATHDIVIDER '/'
#define MASKALL "*.*"
#define READBINARY "r"
#define READTEXT "r"
#define UPDATEBINARY "r+"
#define CREATEBINARY "w+"
#define CREATETEXT "w"
#define APPENDTEXT "a"
/* emulation of the windows API and data types */
/* 20-08-2000 Johannes Winkelmann, jw@tks6.net */
typedef long DWORD;
typedef short BOOL;
#define TRUE 1
#define FALSE 0
#ifdef _DEBUG_LOG /* define macros for debugging */
#include <unistd.h>
#include <sys/time.h>
DWORD GetTickCount()
{
struct timeval tv;
gettimeofday( &tv, 0 );
return (tv.tv_usec / 1000);
}
#endif
#endif
#ifdef _DEBUG_LOG /* define macros for debugging */
BOOL debug_log_first_start = TRUE;
#define debug_log(a); debug_log_proc(a, __FILE__, __LINE__);
#define debug_init(a); debug_init_proc(a);
void debug_log_proc(char *text, char *sourcefile, int sourceline);
void debug_init_proc(char *file_name);
#else
#define debug_log(a); /* no debug this time */
#define debug_init(a); /* no debug this time */
#endif
#define MAXWINSIZE 0x100000
#define MAXWINMASK (MAXWINSIZE-1)
#define UNP_MEMORY MAXWINSIZE
#define Min(x,y) (((x)<(y)) ? (x):(y))
#define Max(x,y) (((x)>(y)) ? (x):(y))
#define NM 260
#define SIZEOF_MARKHEAD 7
#define SIZEOF_OLDMHD 7
#define SIZEOF_NEWMHD 13
#define SIZEOF_OLDLHD 21
#define SIZEOF_NEWLHD 32
#define SIZEOF_SHORTBLOCKHEAD 7
#define SIZEOF_LONGBLOCKHEAD 11
#define SIZEOF_COMMHEAD 13
#define SIZEOF_PROTECTHEAD 26
#define PACK_VER 20 /* version of decompression code*/
#define UNP_VER 20
#define PROTECT_VER 20
enum { M_DENYREAD,M_DENYWRITE,M_DENYNONE,M_DENYALL };
enum { FILE_EMPTY,FILE_ADD,FILE_UPDATE,FILE_COPYOLD,FILE_COPYBLOCK };
enum { SUCCESS,WARNING,FATAL_ERROR,CRC_ERROR,LOCK_ERROR,WRITE_ERROR,
OPEN_ERROR,USER_ERROR,MEMORY_ERROR,USER_BREAK=255,IMM_ABORT=0x8000 };
enum { EN_LOCK=1,EN_VOL=2 };
enum { SD_MEMORY=1,SD_FILES=2 };
enum { NAMES_DONTCHANGE };
enum { LOG_ARC=1,LOG_FILE=2 };
enum { OLD_DECODE=0,OLD_ENCODE=1,NEW_CRYPT=2 };
enum { OLD_UNPACK,NEW_UNPACK };
#define MHD_COMMENT 2
#define MHD_LOCK 4
#define MHD_PACK_COMMENT 16
#define MHD_AV 32
#define MHD_PROTECT 64
#define LHD_SPLIT_BEFORE 1
#define LHD_SPLIT_AFTER 2
#define LHD_PASSWORD 4
#define LHD_COMMENT 8
#define LHD_SOLID 16
#define LHD_WINDOWMASK 0x00e0
#define LHD_WINDOW64 0
#define LHD_WINDOW128 32
#define LHD_WINDOW256 64
#define LHD_WINDOW512 96
#define LHD_WINDOW1024 128
#define LHD_DIRECTORY 0x00e0
#define LONG_BLOCK 0x8000
#define READSUBBLOCK 0x8000
enum { ALL_HEAD=0,MARK_HEAD=0x72,MAIN_HEAD=0x73,FILE_HEAD=0x74,
COMM_HEAD=0x75,AV_HEAD=0x76,SUB_HEAD=0x77,PROTECT_HEAD=0x78};
enum { EA_HEAD=0x100 };
enum { MS_DOS=0,OS2=1,WIN_32=2,UNIX=3 };
struct MarkHeader
{
UBYTE Mark[7];
};
struct NewMainArchiveHeader
{
UWORD HeadCRC;
UBYTE HeadType;
UWORD Flags;
UWORD HeadSize;
UWORD Reserved;
UDWORD Reserved1;
};
struct NewFileHeader
{
UWORD HeadCRC;
UBYTE HeadType;
UWORD Flags;
UWORD HeadSize;
UDWORD PackSize;
UDWORD UnpSize;
UBYTE HostOS;
UDWORD FileCRC;
UDWORD FileTime;
UBYTE UnpVer;
UBYTE Method;
UWORD NameSize;
UDWORD FileAttr;
};
struct BlockHeader
{
UWORD HeadCRC;
UBYTE HeadType;
UWORD Flags;
UWORD HeadSize;
UDWORD DataSize;
};
struct Decode
{
unsigned int MaxNum;
unsigned int DecodeLen[16];
unsigned int DecodePos[16];
unsigned int DecodeNum[2];
};
struct MarkHeader MarkHead;
struct NewMainArchiveHeader NewMhd;
struct NewFileHeader NewLhd;
struct BlockHeader BlockHead;
static UBYTE *TempMemory = NULL; /* temporary unpack-buffer */
static char *CommMemory = NULL;
static UBYTE *UnpMemory = NULL;
static char* ArgName = NULL; /* current file in rar archive */
static char* ArcFileName = NULL; /* file to decompress */
#ifdef _USE_MEMORY_TO_MEMORY_DECOMPRESSION /* mem-to-mem decompression */
static MemoryFile *MemRARFile; /* pointer to RAR file in memory*/
#else
static char* ArcName = NULL; /* RAR archive name */
static FILE *ArcPtr; /* input RAR file handler */
#endif
static char *Password = NULL; /* password to decrypt files */
static unsigned char *temp_output_buffer; /* extract files to this pointer*/
static unsigned long *temp_output_buffer_offset; /* size of temp. extract buffer */
static BOOL FileFound; /* TRUE=use current extracted */
/* data FALSE=throw data away, */
/* wrong file */
static int MainHeadSize;
static long CurBlockPos,NextBlockPos;
static unsigned long CurUnpRead, CurUnpWrite;
static long UnpPackedSize;
static long DestUnpSize;
static UDWORD HeaderCRC;
static int Encryption;
//static unsigned int UnpWrSize;
//static unsigned char *UnpWrAddr;
static unsigned int UnpPtr,WrPtr;
static unsigned char PN1,PN2,PN3;
static unsigned short OldKey[4];
/* function header definitions */
static int ReadHeader(int BlockType);
static BOOL ExtrFile(void);
//BOOL ListFile(void);
static int tread(void *stream,void *buf,unsigned len);
static int tseek(void *stream,long offset,int fromwhere);
static BOOL UnstoreFile(void);
static int IsArchive(void);
static int ReadBlock(int BlockType);
static unsigned int UnpRead(unsigned char *Addr,unsigned int Count);
static void UnpInitData(void);
static void Unpack(unsigned char *UnpAddr);
static UBYTE DecodeAudio(int Delta);
static void DecodeNumber(struct Decode *Dec);
static void UpdKeys(UBYTE *Buf);
static void SetCryptKeys(char *Password);
static void SetOldKeys(char *Password);
static void DecryptBlock(unsigned char *Buf);
static void InitCRC(void);
static UDWORD CalcCRC32(UDWORD StartCRC,UBYTE *Addr,UDWORD Size);
static void UnpReadBuf(int FirstBuf);
static void ReadTables(void);
static void ReadLastTables(void);
static void MakeDecodeTables(unsigned char *LenTab,
struct Decode *Dec,
int Size);
static int my_stricomp(char *Str1,char *Str2);
/* ------------------------------------------------------------------------ */
/* -- global functions ---------------------------------------------------- */
int urarlib_get(void *output,
unsigned long *size,
char *filename,
void *rarfile,
char *libpassword)
/* Get a file from a RAR file to the "output" buffer. The UniquE RAR FileLib
* does everything from allocating memory, decrypting and unpacking the file
* from the archive. TRUE is returned if the file could be successfully
* extracted, else a FALSE indicates a failure.
*/
{
BOOL retcode = FALSE;
#ifdef _DEBUG_LOG
int str_offs; /* used for debug-strings */
char DebugMsg[500]; /* used to compose debug msg */
if(debug_log_first_start)
{
debug_log_first_start=FALSE; /* only create a new log file */
debug_init(_DEBUG_LOG_FILE); /* on startup */
}
#endif
InitCRC(); /* init some vars */
if(ArgName) free(ArgName);
ArgName = strdup(filename); /* set file(s) to extract */
#ifdef _USE_MEMORY_TO_MEMORY_DECOMPRESSION
MemRARFile = rarfile; /* set pointer to mem-RAR file */
#else
if(ArcName) free(ArcName);
ArcName = strdup(rarfile); /* set RAR file name */
#endif
if(Password) free(Password);
if(libpassword != NULL)
Password = strdup(libpassword); /* init password */
else
Password = strdup("");
temp_output_buffer = NULL;
temp_output_buffer_offset=size; /* set size of the temp buffer */
#ifdef _DEBUG_LOG
sprintf(DebugMsg, "Extracting >%s< from >%s< (password is >%s<)...",
filename, (char*)rarfile, libpassword);
debug_log(DebugMsg);
#endif
retcode = ExtrFile(); /* unpack file now! */
//memset(Password,0,sizeof(Password)); /* clear password */
#ifndef _USE_MEMORY_TO_MEMORY_DECOMPRESSION
if (ArcPtr!=NULL){
fclose(ArcPtr);
ArcPtr = NULL;
}
#endif
if(UnpMemory) free(UnpMemory); /* free memory */
if(TempMemory) free(TempMemory);
if(CommMemory) free(CommMemory);
UnpMemory=NULL;
TempMemory=NULL;
CommMemory=NULL;
if(retcode == FALSE)
{
if(temp_output_buffer) /* free memory and return NULL */
free(temp_output_buffer);
temp_output_buffer=NULL;
*(DWORD*)output=0; /* pointer on errors */
*size=0;
#ifdef _DEBUG_LOG
/* sorry for this ugly code, but older SunOS gcc compilers don't support */
/* white spaces within strings */
str_offs = sprintf(DebugMsg, "Error - couldn't extract ");
str_offs += sprintf(DebugMsg + str_offs, ">%s<", filename);
str_offs += sprintf(DebugMsg + str_offs, " and allocated ");
str_offs += sprintf(DebugMsg + str_offs, "%u Bytes", (unsigned int)*size);
str_offs += sprintf(DebugMsg + str_offs, " of unused memory!");
} else
{
sprintf(DebugMsg, "Extracted %u Bytes.", (unsigned int)*size);
}
debug_log(DebugMsg);
#else
}
#endif
*(DWORD*)output=(DWORD)temp_output_buffer;/* return pointer for unpacked*/
/* data */
return retcode;
}
int urarlib_list(void *rarfile, ArchiveList_struct *list)
{
ArchiveList_struct *tmp_List = NULL;
int NoOfFilesInArchive = 0; /* number of files in archive */
#ifdef _DEBUG_LOG
if(debug_log_first_start)
{
debug_log_first_start=FALSE; /* only create a new log file */
debug_init(_DEBUG_LOG_FILE); /* on startup */
}
#endif
InitCRC(); /* init some vars */
#ifdef _USE_MEMORY_TO_MEMORY_DECOMPRESSION
MemRARFile = rarfile; /* assign pointer to RAR file */
MemRARFile->offset = 0;
if (!IsArchive())
{
debug_log("Not a RAR file");
return NoOfFilesInArchive; /* error => exit! */
}
#else
/* open and identify archive */
if ((ArcPtr=fopen(rarfile,READBINARY))!=NULL)
{
if (!IsArchive())
{
debug_log("Not a RAR file");
fclose(ArcPtr);
ArcPtr = NULL;
return NoOfFilesInArchive; /* error => exit! */
}
}
else {
debug_log("Error opening file.");
return NoOfFilesInArchive;
}
#endif
if ((UnpMemory=malloc(UNP_MEMORY))==NULL)
{
debug_log("Can't allocate memory for decompression!");
return NoOfFilesInArchive;
}
#ifdef _USE_MEMORY_TO_MEMORY_DECOMPRESSION
MemRARFile->offset+=NewMhd.HeadSize-MainHeadSize;
#else
tseek(ArcPtr,NewMhd.HeadSize-MainHeadSize,SEEK_CUR);
#endif
(*(DWORD*)list) = (DWORD)NULL; /* init file list */
/* do while file is not extracted and there's no error */
while (TRUE)
{
if (ReadBlock(FILE_HEAD | READSUBBLOCK) <= 0) /* read name of the next */
{ /* file within the RAR archive */
debug_log("Couldn't read next filename from archive (I/O error).");
break; /* error, file not found in */
} /* archive or I/O error */
if (BlockHead.HeadType==SUB_HEAD)
{
debug_log("Sorry, sub-headers not supported.");
break; /* error => exit */
}
if((void*)(*(DWORD*)list) == NULL) /* first entry */
{
tmp_List = malloc(sizeof(ArchiveList_struct));
tmp_List->next = NULL;
(*(DWORD*)list) = (DWORD)tmp_List;
} else /* add entry */
{
tmp_List->next = malloc(sizeof(ArchiveList_struct));
tmp_List = (ArchiveList_struct*) tmp_List->next;
tmp_List->next = NULL;
}
tmp_List->item.Name = malloc(NewLhd.NameSize + 1);
strcpy(tmp_List->item.Name, ArcFileName);
tmp_List->item.NameSize = NewLhd.NameSize;
tmp_List->item.PackSize = NewLhd.PackSize;
tmp_List->item.UnpSize = NewLhd.UnpSize;
tmp_List->item.HostOS = NewLhd.HostOS;
tmp_List->item.FileCRC = NewLhd.FileCRC;
tmp_List->item.FileTime = NewLhd.FileTime;
tmp_List->item.UnpVer = NewLhd.UnpVer;
tmp_List->item.Method = NewLhd.Method;
tmp_List->item.FileAttr = NewLhd.FileAttr;
NoOfFilesInArchive++; /* count files */
#ifdef _USE_MEMORY_TO_MEMORY_DECOMPRESSION
MemRARFile->offset = NextBlockPos;
#else
if (ArcPtr!=NULL) tseek(ArcPtr,NextBlockPos,SEEK_SET);
#endif
};
/* free memory, clear password and close archive */
memset(Password,0,sizeof(Password)); /* clear password */
#ifndef _USE_MEMORY_TO_MEMORY_DECOMPRESSION
if (ArcPtr!=NULL){
fclose(ArcPtr);
ArcPtr = NULL;
}
#endif
free(UnpMemory); /* free memory */
free(TempMemory);
free(CommMemory);
UnpMemory=NULL;
TempMemory=NULL;
CommMemory=NULL;
return NoOfFilesInArchive;
}
/* urarlib_freelist:
* (after the suggestion and code of Duy Nguyen, Sean O'Blarney
* and Johannes Winkelmann who independently wrote a patch)
* free the memory of a ArchiveList_struct created by urarlib_list.
*
* input: *list pointer to an ArchiveList_struct
* output: -
*/
void urarlib_freelist(ArchiveList_struct *list)
{
ArchiveList_struct* tmp = list;
while ( list ) {
tmp = list->next;
free( list->item.Name );
free( list );
list = tmp;
}
}
/* ------------------------------------------------------------------------ */
/****************************************************************************
****************************************************************************
****************************************************************************
****************************************************************************
******* *******
******* *******
******* *******
******* B L O C K I / O *******
******* *******
******* *******
******* *******
****************************************************************************
****************************************************************************
****************************************************************************
****************************************************************************/
#define GetHeaderByte(N) Header[N]
#define GetHeaderWord(N) (Header[N]+((UWORD)Header[N+1]<<8))
#define GetHeaderDword(N) (Header[N]+((UWORD)Header[N+1]<<8)+\
((UDWORD)Header[N+2]<<16)+\
((UDWORD)Header[N+3]<<24))
int ReadBlock(int BlockType)
{
struct NewFileHeader SaveFileHead;
int Size=0,ReadSubBlock=0;
static int LastBlock;
memcpy(&SaveFileHead,&NewLhd,sizeof(SaveFileHead));
if (BlockType & READSUBBLOCK)
ReadSubBlock=1;
BlockType &= 0xff;
{
while (1)
{
#ifdef _USE_MEMORY_TO_MEMORY_DECOMPRESSION
CurBlockPos=MemRARFile->offset; /* get offset of mem-file */
#else
CurBlockPos=ftell(ArcPtr);
#endif
Size=ReadHeader(FILE_HEAD);
if (Size!=0)
{
if (NewLhd.HeadSize<SIZEOF_SHORTBLOCKHEAD)
return(0);
NextBlockPos=CurBlockPos+NewLhd.HeadSize;
if (NewLhd.Flags & LONG_BLOCK)
NextBlockPos+=NewLhd.PackSize;
if (NextBlockPos<=CurBlockPos)
return(0);
}
if (Size > 0 && BlockType!=SUB_HEAD)
LastBlock=BlockType;
if (Size==0 || BlockType==ALL_HEAD || NewLhd.HeadType==BlockType ||
(NewLhd.HeadType==SUB_HEAD && ReadSubBlock && LastBlock==BlockType))
break;
#ifdef _USE_MEMORY_TO_MEMORY_DECOMPRESSION
MemRARFile->offset = NextBlockPos;
#else
tseek(ArcPtr, NextBlockPos, SEEK_SET);
#endif
}
}
BlockHead.HeadCRC=NewLhd.HeadCRC;
BlockHead.HeadType=NewLhd.HeadType;
BlockHead.Flags=NewLhd.Flags;
BlockHead.HeadSize=NewLhd.HeadSize;
BlockHead.DataSize=NewLhd.PackSize;
if (BlockType!=NewLhd.HeadType) BlockType=ALL_HEAD;
if((FILE_HEAD == BlockType) && (Size>0))
{
ArcFileName=realloc(ArcFileName,NewLhd.NameSize+1);
#ifdef _USE_MEMORY_TO_MEMORY_DECOMPRESSION
tread(MemRARFile, ArcFileName, NewLhd.NameSize);
#else
tread(ArcPtr,ArcFileName,NewLhd.NameSize);
#endif
ArcFileName[NewLhd.NameSize]=0;
#ifdef _DEBUG_LOG
if (NewLhd.HeadCRC!=(UWORD)~CalcCRC32(HeaderCRC,(UBYTE*)&ArcFileName[0],
NewLhd.NameSize))
{
debug_log("file header broken");
}
#endif
Size+=NewLhd.NameSize;
} else
{
memcpy(&NewLhd,&SaveFileHead,sizeof(NewLhd));
#ifdef _USE_MEMORY_TO_MEMORY_DECOMPRESSION
MemRARFile->offset = CurBlockPos;
#else
tseek(ArcPtr,CurBlockPos,SEEK_SET);
#endif
}
return(Size);
}
int ReadHeader(int BlockType)
{
int Size = 0;
unsigned char Header[64];
switch(BlockType)
{
case MAIN_HEAD:
#ifdef _USE_MEMORY_TO_MEMORY_DECOMPRESSION
Size=tread(MemRARFile, Header, SIZEOF_NEWMHD);
#else
Size=tread(ArcPtr,Header,SIZEOF_NEWMHD);
#endif
NewMhd.HeadCRC=(unsigned short)GetHeaderWord(0);
NewMhd.HeadType=GetHeaderByte(2);
NewMhd.Flags=(unsigned short)GetHeaderWord(3);
NewMhd.HeadSize=(unsigned short)GetHeaderWord(5);
NewMhd.Reserved=(unsigned short)GetHeaderWord(7);
NewMhd.Reserved1=GetHeaderDword(9);
HeaderCRC=CalcCRC32(0xFFFFFFFFL,&Header[2],SIZEOF_NEWMHD-2);
break;
case FILE_HEAD:
#ifdef _USE_MEMORY_TO_MEMORY_DECOMPRESSION
Size=tread(MemRARFile, Header, SIZEOF_NEWLHD);
#else
Size=tread(ArcPtr,Header,SIZEOF_NEWLHD);
#endif
NewLhd.HeadCRC=(unsigned short)GetHeaderWord(0);
NewLhd.HeadType=GetHeaderByte(2);
NewLhd.Flags=(unsigned short)GetHeaderWord(3);
NewLhd.HeadSize=(unsigned short)GetHeaderWord(5);
NewLhd.PackSize=GetHeaderDword(7);
NewLhd.UnpSize=GetHeaderDword(11);
NewLhd.HostOS=GetHeaderByte(15);
NewLhd.FileCRC=GetHeaderDword(16);
NewLhd.FileTime=GetHeaderDword(20);
NewLhd.UnpVer=GetHeaderByte(24);
NewLhd.Method=GetHeaderByte(25);
NewLhd.NameSize=(unsigned short)GetHeaderWord(26);
NewLhd.FileAttr=GetHeaderDword(28);
HeaderCRC=CalcCRC32(0xFFFFFFFFL,&Header[2],SIZEOF_NEWLHD-2);
break;
#ifdef _DEBUG_LOG
case COMM_HEAD: /* log errors in case of debug */
debug_log("Comment headers not supported! "\
"Please create archives without comments.");
break;
case PROTECT_HEAD:
debug_log("Protected headers not supported!");
break;
case ALL_HEAD:
debug_log("ShortBlockHeader not supported!");
break;
default:
debug_log("Unknown//unsupported !");
#else
default: /* else do nothing */
break;
#endif
}
return(Size);
}
/* **************************************************************************
****************************************************************************
****************************************************************************
************************************************************************** */
/* **************************************************************************
****************************************************************************
****************************************************************************
****************************************************************************
******* *******
******* *******
******* *******
******* E X T R A C T L O O P *******
******* *******
******* *******
******* *******
****************************************************************************
****************************************************************************
****************************************************************************
************************************************************************** */
int IsArchive(void)
{
#ifdef _DEBUG_LOG
int str_offs; /* used for debug-strings */
char DebugMsg[500]; /* used to compose debug msg */
#endif
#ifdef _USE_MEMORY_TO_MEMORY_DECOMPRESSION
if (tread(MemRARFile, MarkHead.Mark, SIZEOF_MARKHEAD) != SIZEOF_MARKHEAD)
return(FALSE);
#else
if (tread(ArcPtr,MarkHead.Mark,SIZEOF_MARKHEAD)!=SIZEOF_MARKHEAD)
return(FALSE);
#endif
/* Old archive => error */
if (MarkHead.Mark[0]==0x52 && MarkHead.Mark[1]==0x45 &&
MarkHead.Mark[2]==0x7e && MarkHead.Mark[3]==0x5e)
{
debug_log("Attention: format as OLD detected! Can't handel archive!");
}
else
/* original RAR v2.0 */
if ((MarkHead.Mark[0]==0x52 && MarkHead.Mark[1]==0x61 && /* original */
MarkHead.Mark[2]==0x72 && MarkHead.Mark[3]==0x21 && /* RAR header*/
MarkHead.Mark[4]==0x1a && MarkHead.Mark[5]==0x07 &&
MarkHead.Mark[6]==0x00) ||
/* "UniquE!" - header */
(MarkHead.Mark[0]=='U' && MarkHead.Mark[1]=='n' && /* "UniquE!" */
MarkHead.Mark[2]=='i' && MarkHead.Mark[3]=='q' && /* header */
MarkHead.Mark[4]=='u' && MarkHead.Mark[5]=='E' &&
MarkHead.Mark[6]=='!'))
{
if (ReadHeader(MAIN_HEAD)!=SIZEOF_NEWMHD)
return(FALSE);
} else
{
#ifdef _DEBUG_LOG
/* sorry for this ugly code, but older SunOS gcc compilers don't */
/* support white spaces within strings */
str_offs = sprintf(DebugMsg, "unknown archive type (only plain RAR ");
str_offs += sprintf(DebugMsg + str_offs, "supported (normal and solid ");
str_offs += sprintf(DebugMsg + str_offs, "archives), SFX and Volumes ");
str_offs += sprintf(DebugMsg + str_offs, "are NOT supported!)");
debug_log(DebugMsg);
#endif
}
MainHeadSize=SIZEOF_NEWMHD;
return(TRUE);
}
BOOL ExtrFile(void)
{
BOOL ReturnCode=TRUE;
FileFound=FALSE; /* no file found by default */
#ifdef _USE_MEMORY_TO_MEMORY_DECOMPRESSION
MemRARFile->offset = 0; /* start reading from offset 0 */
if (!IsArchive())
{
debug_log("Not a RAR file");
return FALSE; /* error => exit! */
}
#else
/* open and identify archive */
if ((ArcPtr=fopen(ArcName,READBINARY))!=NULL)
{
if (!IsArchive())
{
debug_log("Not a RAR file");
fclose(ArcPtr);
ArcPtr = NULL;
return FALSE; /* error => exit! */
}
} else
{
debug_log("Error opening file.");
return FALSE;
}
#endif
if ((UnpMemory=malloc(UNP_MEMORY))==NULL)
{
debug_log("Can't allocate memory for decompression!");
return FALSE;
}
#ifdef _USE_MEMORY_TO_MEMORY_DECOMPRESSION
MemRARFile->offset+=NewMhd.HeadSize-MainHeadSize;
#else
tseek(ArcPtr,NewMhd.HeadSize-MainHeadSize,SEEK_CUR);
#endif
/* do while file is not extracted and there's no error */
do
{
if (ReadBlock(FILE_HEAD | READSUBBLOCK) <= 0) /* read name of the next */
{ /* file within the RAR archive */
/*
*
* 21.11.2000 UnQ There's a problem with some linux distros when a file
* can not be found in an archive.
*
* debug_log("Couldn't read next filename from archive (I/O error).");
*
*/
ReturnCode=FALSE;
break; /* error, file not found in */
} /* archive or I/O error */
if (BlockHead.HeadType==SUB_HEAD)
{
debug_log("Sorry, sub-headers not supported.");
ReturnCode=FALSE;
break; /* error => exit */
}
if(TRUE == (FileFound=(my_stricomp(ArgName, ArcFileName) == 0)))
/* *** file found! *** */
{
{
temp_output_buffer=malloc(NewLhd.UnpSize);/* allocate memory for the*/
}
*temp_output_buffer_offset=0; /* file. The default offset */
/* within the buffer is 0 */
if(temp_output_buffer == NULL)
{
debug_log("can't allocate memory for the file decompression");
ReturnCode=FALSE;
break; /* error, can't extract file! */
}
}
/* in case of a solid archive, we need to decompress any single file till
* we have found the one we are looking for. In case of normal archives
* (recommended!!), we skip the files until we are sure that it is the
* one we want.
*/
if((NewMhd.Flags & 0x08) || FileFound)
{
if (NewLhd.UnpVer<13 || NewLhd.UnpVer>UNP_VER)
{
debug_log("unknown compression method");
ReturnCode=FALSE;
break; /* error, can't extract file! */
}
CurUnpRead=CurUnpWrite=0;
if ((*Password!=0) && (NewLhd.Flags & LHD_PASSWORD))
Encryption=NewLhd.UnpVer;
else
Encryption=0;
if (Encryption) SetCryptKeys(Password);
UnpPackedSize=NewLhd.PackSize;
DestUnpSize=NewLhd.UnpSize;
if (NewLhd.Method==0x30)
{
UnstoreFile();
} else
{
Unpack(UnpMemory);
}
#ifdef _DO_CRC32_CHECK /* calculate CRC32 */
if((UBYTE*)temp_output_buffer != NULL)
{
if(NewLhd.FileCRC!=~CalcCRC32(0xFFFFFFFFL,
(UBYTE*)temp_output_buffer,
NewLhd.UnpSize))
{
debug_log("CRC32 error - file couldn't be decompressed correctly!");
ReturnCode=FALSE;
break; /* error, can't extract file! */
}
}
#endif
}
#ifdef _USE_MEMORY_TO_MEMORY_DECOMPRESSION
MemRARFile->offset = NextBlockPos;
#else
if (ArcPtr!=NULL) tseek(ArcPtr,NextBlockPos,SEEK_SET);
#endif
} while(my_stricomp(ArgName, ArcFileName) != 0);/* exit if file is extracted */
/* free memory, clear password and close archive */
free(UnpMemory);
UnpMemory=NULL;
#ifndef _USE_MEMORY_TO_MEMORY_DECOMPRESSION
if (ArcPtr!=NULL){
fclose(ArcPtr);
ArcPtr = NULL;
}
#endif
return ReturnCode; /* file extracted successful! */
}
/* **************************************************************************
****************************************************************************
****************************************************************************
************************************************************************** */
/* **************************************************************************
****************************************************************************
****************************************************************************
****************************************************************************
******* *******
******* *******
******* *******
******* G L O B A L F U N C T I O N S *******
******* *******
******* *******
******* *******
****************************************************************************
****************************************************************************
****************************************************************************
************************************************************************** */
int tread(void *stream,void *buf,unsigned len)
{
#ifdef _USE_MEMORY_TO_MEMORY_DECOMPRESSION
if(((MemRARFile->offset + len) > MemRARFile->size) || (len == 0))
return 0;
memcpy(buf,
(BYTE*)(((MemoryFile*)stream)->data)+((MemoryFile*)stream)->offset,
len % ((((MemoryFile*)stream)->size) - 1));
MemRARFile->offset+=len; /* update read pointer */
return len % ((((MemoryFile*)stream)->size) - 1);
#else
return(fread(buf,1,len,(FILE*)stream));
#endif
}
#ifndef _USE_MEMORY_TO_MEMORY_DECOMPRESSION
int tseek(void *stream,long offset,int fromwhere)
{
return(fseek((FILE*)stream,offset,fromwhere));
}
#endif
static char* my_strupper(char *Str)
{
char *ChPtr;
for (ChPtr=Str;*ChPtr;ChPtr++)
*ChPtr=(char)toupper(*ChPtr);
return(Str);
}
static int my_stricomp(char *Str1,char *Str2)
/* compare strings without regard of '\' and '/' */
{
char S1[512],S2[512];
char *chptr;
strncpy(S1,Str1,sizeof(S1));
strncpy(S2,Str2,sizeof(S2));
while((chptr = strchr(S1, '\\')) != NULL) /* ignore backslash */
{
*chptr = '_';
}
while((chptr = strchr(S2, '\\')) != NULL) /* ignore backslash */
{
*chptr = '_';
}
while((chptr = strchr(S1, '/')) != NULL) /* ignore slash */
{
*chptr = '_';
}
while((chptr = strchr(S2, '/')) != NULL) /* ignore slash */
{
*chptr = '_';
}
return(strcmp(my_strupper(S1),my_strupper(S2)));
}
/* **************************************************************************
****************************************************************************
****************************************************************************
************************************************************************** */
/* **************************************************************************
****************************************************************************
****************************************************************************
****************************************************************************
******* *******
******* *******
******* *******
******* U N P A C K C O D E *******
******* *******
******* *******
******* *******
****************************************************************************
****************************************************************************
****************************************************************************
************************************************************************** */
/* *****************************
* ** unpack stored RAR files **
* *****************************/
BOOL UnstoreFile(void)
{
if ((long)(*temp_output_buffer_offset=UnpRead(temp_output_buffer,
NewLhd.UnpSize))==-1)
{
debug_log("Read error of stored file!");
return FALSE;
}
return TRUE;
}
/* ****************************************
* ** RAR decompression code starts here **
* ****************************************/
#define NC 298 /* alphabet = {0,1,2, .,NC - 1} */
#define DC 48
#define RC 28
#define BC 19
#define MC 257
enum {CODE_HUFFMAN=0,CODE_LZ=1,CODE_LZ2=2,CODE_REPEATLZ=3,CODE_CACHELZ=4,
CODE_STARTFILE=5,CODE_ENDFILE=6,CODE_STARTMM=8,CODE_ENDMM=7,
CODE_MMDELTA=9};
struct AudioVariables
{
int K1,K2,K3,K4,K5;
int D1,D2,D3,D4;
int LastDelta;
unsigned int Dif[11];
unsigned int ByteCount;
int LastChar;
};
#define NC 298 /* alphabet = {0, 1, 2, ..., NC - 1} */
#define DC 48
#define RC 28
#define BC 19
#define MC 257
struct AudioVariables AudV[4];
#define GetBits() \
BitField = ( ( ( (UDWORD)InBuf[InAddr] << 16 ) | \
( (UWORD) InBuf[InAddr+1] << 8 ) | \
( InBuf[InAddr+2] ) ) \
>> (8-InBit) ) & 0xffff;
#define AddBits(Bits) \
InAddr += ( InBit + (Bits) ) >> 3; \
InBit = ( InBit + (Bits) ) & 7;
static unsigned char *UnpBuf;
static unsigned int BitField;
static unsigned int Number;
unsigned char InBuf[8192]; /* input read buffer */
unsigned char UnpOldTable[MC*4];
unsigned int InAddr,InBit,ReadTop;
unsigned int LastDist,LastLength;
static unsigned int Length,Distance;
unsigned int OldDist[4],OldDistPtr;
struct LitDecode
{
unsigned int MaxNum;
unsigned int DecodeLen[16];
unsigned int DecodePos[16];
unsigned int DecodeNum[NC];
} LD;
struct DistDecode
{
unsigned int MaxNum;
unsigned int DecodeLen[16];
unsigned int DecodePos[16];
unsigned int DecodeNum[DC];
} DD;
struct RepDecode
{
unsigned int MaxNum;
unsigned int DecodeLen[16];
unsigned int DecodePos[16];
unsigned int DecodeNum[RC];
} RD;
struct MultDecode
{
unsigned int MaxNum;
unsigned int DecodeLen[16];
unsigned int DecodePos[16];
unsigned int DecodeNum[MC];
} MD[4];
struct BitDecode
{
unsigned int MaxNum;
unsigned int DecodeLen[16];
unsigned int DecodePos[16];
unsigned int DecodeNum[BC];
} BD;
static struct MultDecode *MDPtr[4]={&MD[0],&MD[1],&MD[2],&MD[3]};
int UnpAudioBlock,UnpChannels,CurChannel,ChannelDelta;
void Unpack(unsigned char *UnpAddr)
/* *** 38.3% of all CPU time is spent within this function!!! */
{
static unsigned char LDecode[]={0,1,2,3,4,5,6,7,8,10,12,14,16,20,24,28,32,
40,48,56,64,80,96,112,128,160,192,224};
static unsigned char LBits[]= {0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,
3,3,3,4,4,4,4,5,5,5,5};
static int DDecode[]={0,1,2,3,4,6,8,12,16,24,32,48,64,96,128,192,256,384,
512,768,1024,1536,2048,3072,4096,6144,8192,12288,
16384,24576,32768U,49152U,65536,98304,131072,196608,
262144,327680,393216,458752,524288,589824,655360,
720896,786432,851968,917504,983040};
static unsigned char DBits[]= {0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,
9,10,10,11,11,12,12,13,13,14,14,15,15,16,
16,16,16,16,16,16,16,16,16,16,16,16,16};
static unsigned char SDDecode[]={0,4,8,16,32,64,128,192};
static unsigned char SDBits[]={2,2,3, 4, 5, 6, 6, 6};
unsigned int Bits;
UnpBuf=UnpAddr; /* UnpAddr is a pointer to the */
UnpInitData(); /* unpack buffer */
UnpReadBuf(1);
if (!(NewLhd.Flags & LHD_SOLID))
ReadTables();
DestUnpSize--;
while (DestUnpSize>=0)
{
UnpPtr&=MAXWINMASK;
if (InAddr>sizeof(InBuf)-30)
UnpReadBuf(0);
if (((WrPtr-UnpPtr) & MAXWINMASK)<270 && WrPtr!=UnpPtr)
{
if (FileFound)
{
if (UnpPtr<WrPtr)
{
if((*temp_output_buffer_offset + UnpPtr) > NewLhd.UnpSize)
{
debug_log("Fatal! Buffer overrun during decompression!");
DestUnpSize=-1;
} else
{
/* copy extracted data to output buffer */
memcpy(temp_output_buffer + *temp_output_buffer_offset,
&UnpBuf[WrPtr], (0-WrPtr) & MAXWINMASK);
/* update offset within buffer */
*temp_output_buffer_offset+= (0-WrPtr) & MAXWINMASK;
/* copy extracted data to output buffer */
memcpy(temp_output_buffer + *temp_output_buffer_offset, UnpBuf,
UnpPtr);
/* update offset within buffer */
*temp_output_buffer_offset+=UnpPtr;
}
} else
{
if((*temp_output_buffer_offset + (UnpPtr-WrPtr)) > NewLhd.UnpSize)
{
debug_log("Fatal! Buffer overrun during decompression!");
DestUnpSize=-1;
} else
{
/* copy extracted data to output buffer */
memcpy(temp_output_buffer + *temp_output_buffer_offset,
&UnpBuf[WrPtr], UnpPtr-WrPtr);
*temp_output_buffer_offset+=UnpPtr-WrPtr; /* update offset within buffer */
}
}
}
WrPtr=UnpPtr;
}
if (UnpAudioBlock)
{
DecodeNumber((struct Decode *)MDPtr[CurChannel]);
if (Number==256)
{
ReadTables();
continue;
}
UnpBuf[UnpPtr++]=DecodeAudio(Number);
if (++CurChannel==UnpChannels)
CurChannel=0;
DestUnpSize--;
continue;
}
DecodeNumber((struct Decode *)&LD);
if (Number<256)
{
UnpBuf[UnpPtr++]=(UBYTE)Number;
DestUnpSize--;
continue;
}
if (Number>269)
{
Length=LDecode[Number-=270]+3;
if ((Bits=LBits[Number])>0)
{
GetBits();
Length+=BitField>>(16-Bits);
AddBits(Bits);
}
DecodeNumber((struct Decode *)&DD);
Distance=DDecode[Number]+1;
if ((Bits=DBits[Number])>0)
{
GetBits();
Distance+=BitField>>(16-Bits);
AddBits(Bits);
}
if (Distance>=0x40000L)
Length++;
if (Distance>=0x2000)
Length++;
LastDist=OldDist[OldDistPtr++ & 3]=Distance;
DestUnpSize-=(LastLength=Length);
while (Length--)
{
UnpBuf[UnpPtr]=UnpBuf[(UnpPtr-Distance) & MAXWINMASK];
UnpPtr=(UnpPtr+1) & MAXWINMASK;
}
continue;
}
if (Number==269)
{
ReadTables();
continue;
}
if (Number==256)
{
Length=LastLength;
Distance=LastDist;
LastDist=OldDist[OldDistPtr++ & 3]=Distance;
DestUnpSize-=(LastLength=Length);
while (Length--)
{
UnpBuf[UnpPtr]=UnpBuf[(UnpPtr-Distance) & MAXWINMASK];
UnpPtr=(UnpPtr+1) & MAXWINMASK;
}
continue;
}
if (Number<261)
{
Distance=OldDist[(OldDistPtr-(Number-256)) & 3];
DecodeNumber((struct Decode *)&RD);
Length=LDecode[Number]+2;
if ((Bits=LBits[Number])>0)
{
GetBits();
Length+=BitField>>(16-Bits);
AddBits(Bits);
}
if (Distance>=0x40000)
Length++;
if (Distance>=0x2000)
Length++;
if (Distance>=0x101)
Length++;
LastDist=OldDist[OldDistPtr++ & 3]=Distance;
DestUnpSize-=(LastLength=Length);
while (Length--)
{
UnpBuf[UnpPtr]=UnpBuf[(UnpPtr-Distance) & MAXWINMASK];
UnpPtr=(UnpPtr+1) & MAXWINMASK;
}
continue;
}
if (Number<270)
{
Distance=SDDecode[Number-=261]+1;
if ((Bits=SDBits[Number])>0)
{
GetBits();
Distance+=BitField>>(16-Bits);
AddBits(Bits);
}
Length=2;
LastDist=OldDist[OldDistPtr++ & 3]=Distance;
DestUnpSize-=(LastLength=Length);
while (Length--)
{
UnpBuf[UnpPtr]=UnpBuf[(UnpPtr-Distance) & MAXWINMASK];
UnpPtr=(UnpPtr+1) & MAXWINMASK;
}
continue;
}
}
ReadLastTables();
if (FileFound) /* flush buffer */
{
if (UnpPtr<WrPtr)
{
if((*temp_output_buffer_offset + UnpPtr) > NewLhd.UnpSize)
{
debug_log("Fatal! Buffer overrun during decompression!");
DestUnpSize=-1;
} else
{
/* copy extracted data to output buffer */
memcpy(temp_output_buffer + *temp_output_buffer_offset, &UnpBuf[WrPtr],
(0-WrPtr) & MAXWINMASK);
/* update offset within buffer */
*temp_output_buffer_offset+= (0-WrPtr) & MAXWINMASK;
/* copy extracted data to output buffer */
memcpy(temp_output_buffer + *temp_output_buffer_offset, UnpBuf, UnpPtr);
/* update offset within buffer */
*temp_output_buffer_offset+=UnpPtr;
}
} else
{
if((*temp_output_buffer_offset + (UnpPtr-WrPtr)) > NewLhd.UnpSize)
{
debug_log("Fatal! Buffer overrun during decompression!");
DestUnpSize=-1;
} else
{
/* copy extracted data to output buffer */
memcpy(temp_output_buffer + *temp_output_buffer_offset, &UnpBuf[WrPtr],
UnpPtr-WrPtr);
/* update offset within buffer */
*temp_output_buffer_offset+=UnpPtr-WrPtr;
}
}
}
WrPtr=UnpPtr;
}
unsigned int UnpRead(unsigned char *Addr,unsigned int Count)
{
int RetCode=0;
unsigned int I,ReadSize,TotalRead=0;
unsigned char *ReadAddr;
ReadAddr=Addr;
while (Count > 0)
{
ReadSize=(unsigned int)((Count>(unsigned long)UnpPackedSize) ?
(unsigned int)UnpPackedSize : Count);
#ifdef _USE_MEMORY_TO_MEMORY_DECOMPRESSION
if(MemRARFile->data == NULL)
return(0);
RetCode=tread(MemRARFile, ReadAddr, ReadSize);
#else
if (ArcPtr==NULL)
return(0);
RetCode=tread(ArcPtr,ReadAddr,ReadSize);
#endif
CurUnpRead+=RetCode;
ReadAddr+=RetCode;
TotalRead+=RetCode;
Count-=RetCode;
UnpPackedSize-=RetCode;
break;
}
if (RetCode!= -1)
{
RetCode=TotalRead;
if (Encryption)
{
if (Encryption<20)
{
debug_log("Old Crypt() not supported!");
}
else
{
for (I=0;I<(unsigned int)RetCode;I+=16)
DecryptBlock(&Addr[I]);
}
}
}
return(RetCode);
}
void UnpReadBuf(int FirstBuf)
{
int RetCode;
if (FirstBuf)
{
ReadTop=UnpRead(InBuf,sizeof(InBuf));
InAddr=0;
}
else
{
memcpy(InBuf,&InBuf[sizeof(InBuf)-32],32);
InAddr&=0x1f;
RetCode=UnpRead(&InBuf[32],sizeof(InBuf)-32);
if (RetCode>0)
ReadTop=RetCode+32;
else
ReadTop=InAddr;
}
}
void ReadTables(void)
{
UBYTE BitLength[BC];
unsigned char Table[MC*4];
int TableSize,N,I;
if (InAddr>sizeof(InBuf)-25)
UnpReadBuf(0);
GetBits();
UnpAudioBlock=(BitField & 0x8000);
if (!(BitField & 0x4000))
memset(UnpOldTable,0,sizeof(UnpOldTable));
AddBits(2);
if (UnpAudioBlock)
{
UnpChannels=((BitField>>12) & 3)+1;
if (CurChannel>=UnpChannels)
CurChannel=0;
AddBits(2);
TableSize=MC*UnpChannels;
}
else
TableSize=NC+DC+RC;
for (I=0;I<BC;I++)
{
GetBits();
BitLength[I]=(UBYTE)(BitField >> 12);
AddBits(4);
}
MakeDecodeTables(BitLength,(struct Decode *)&BD,BC);
I=0;
while (I<TableSize)
{
if (InAddr>sizeof(InBuf)-5)
UnpReadBuf(0);
DecodeNumber((struct Decode *)&BD);
if (Number<16)
{
Table[I]=(Number+UnpOldTable[I]) & 0xf;
I++;
}
else
if (Number==16)
{
GetBits();
N=(BitField >> 14)+3;
AddBits(2);
while (N-- > 0 && I<TableSize)
{
Table[I]=Table[I-1];
I++;
}
}
else
{
if (Number==17)
{
GetBits();
N=(BitField >> 13)+3;
AddBits(3);
}
else
{
GetBits();
N=(BitField >> 9)+11;
AddBits(7);
}
while (N-- > 0 && I<TableSize)
Table[I++]=0;
}
}
if (UnpAudioBlock)
for (I=0;I<UnpChannels;I++)
MakeDecodeTables(&Table[I*MC],(struct Decode *)MDPtr[I],MC);
else
{
MakeDecodeTables(&Table[0],(struct Decode *)&LD,NC);
MakeDecodeTables(&Table[NC],(struct Decode *)&DD,DC);
MakeDecodeTables(&Table[NC+DC],(struct Decode *)&RD,RC);
}
memcpy(UnpOldTable,Table,sizeof(UnpOldTable));
}
static void ReadLastTables(void)
{
if (ReadTop>=InAddr+5)
{
if (UnpAudioBlock)
{
DecodeNumber((struct Decode *)MDPtr[CurChannel]);
if (Number==256)
ReadTables();
}
else
{
DecodeNumber((struct Decode *)&LD);
if (Number==269)
ReadTables();
}
}
}
static void MakeDecodeTables(unsigned char *LenTab,
struct Decode *Dec,
int Size)
{
int LenCount[16],TmpPos[16],I;
long M,N;
memset(LenCount,0,sizeof(LenCount));
for (I=0;I<Size;I++)
LenCount[LenTab[I] & 0xF]++;
LenCount[0]=0;
for (TmpPos[0]=Dec->DecodePos[0]=Dec->DecodeLen[0]=0,N=0,I=1;I<16;I++)
{
N=2*(N+LenCount[I]);
M=N<<(15-I);
if (M>0xFFFF)
M=0xFFFF;
Dec->DecodeLen[I]=(unsigned int)M;
TmpPos[I]=Dec->DecodePos[I]=Dec->DecodePos[I-1]+LenCount[I-1];
}
for (I=0;I<Size;I++)
if (LenTab[I]!=0)
Dec->DecodeNum[TmpPos[LenTab[I] & 0xF]++]=I;
Dec->MaxNum=Size;
}
static void DecodeNumber(struct Decode *Deco)
/* *** 52.6% of all CPU time is spent within this function!!! */
{
unsigned int I;
register unsigned int N;
GetBits();
#ifdef _USE_ASM
#ifdef _WIN_32
__asm {
xor eax, eax
mov eax, BitField // N=BitField & 0xFFFE;
and eax, 0xFFFFFFFE
mov [N], eax
mov edx, [Deco] // EAX=N, EDX=Deco
cmp eax, dword ptr[edx + 8*4 + 4]// if (N<Dec->DecodeLen[8])
jae else_G
cmp eax, dword ptr[edx + 4*4 + 4]// if (N<Dec->DecodeLen[4])
jae else_F
cmp eax, dword ptr[edx + 2*4 + 4]// if (N<Dec->DecodeLen[2])
jae else_C
cmp eax, dword ptr[edx + 1*4 + 4]// if (N<Dec->DecodeLen[1])
jae else_1
mov I, 1 // I=1;
jmp next_1
else_1: // else
mov I, 2 // I=2;
next_1:
jmp next_C
else_C: // else
cmp eax, dword ptr[edx + 3*4 + 4]// if (N<Dec->DecodeLen[3])
jae else_2
mov I, 3 // I=3;
jmp next_2
else_2: // else
mov I, 4 // I=4;
next_2:
next_C: // else
jmp next_F
else_F:
cmp eax, dword ptr[edx + 6*4 + 4]// if (N<Dec->DecodeLen[6])
jae else_E
cmp eax, dword ptr[edx + 5*4 + 4]// if (N<Dec->DecodeLen[5])
jae else_3
mov I, 5 // I=5;
jmp next_3
else_3: // else
mov I, 6 // I=6;
next_3:
jmp next_E
else_E: // else
cmp eax, dword ptr[edx + 7*4 + 4]// if (N<Dec->DecodeLen[7])
jae else_4
mov I, 7 // I=7;
jmp next_4
else_4: // else
mov I, 8 // I=8;
next_4:
next_E:
next_F:
jmp next_G
else_G:
cmp eax, dword ptr[edx + 12*4 + 4] // if (N<Dec->DecodeLen[12])
jae else_D
cmp eax, dword ptr[edx + 10*4 + 4]// if (N<Dec->DecodeLen[10])
jae else_B
cmp eax, dword ptr[edx + 9*4 + 4]// if (N<Dec->DecodeLen[9])
jae else_5
mov I, 9 // I=9;
jmp next_5
else_5: // else
mov I, 10 // I=10;
next_5:
jmp next_B
else_B: // else
cmp eax, dword ptr[edx + 11*4 + 4]// if (N<Dec->DecodeLen[11])
jae else_6
mov I, 11 // I=11;
jmp next_6
else_6: // else
mov I, 12 // I=12;
next_6:
next_B:
jmp next_D
else_D: // else
cmp eax, dword ptr[edx + 14*4 + 4]// if (N<Dec->DecodeLen[14])
jae else_A
cmp eax, dword ptr[edx + 13*4 + 4]// if (N<Dec->DecodeLen[13])
jae else_7
mov I, 13 // I=13;
jmp next_7
else_7: // else
mov I, 14 // I=14;
next_7:
jmp next_A
else_A: // else
mov I, 15 // I=15;
next_A:
next_D:
next_G:
}
#else
__asm__ __volatile__ (
"andl $0xFFFFFFFE, %%eax"
" movl %%eax, %1"
" cmpl 8*4(%%edx), %%eax /* 5379 */"
" jae else_G"
""
" cmpl 4*4(%%edx), %%eax"
" jae else_F"
""
" cmpl 2*4(%%edx), %%eax"
" jae else_C"
""
" cmpl 1*4(%%edx), %%eax"
""
" jae else_1"
" movl $1, %0"
" jmp next_1"
" else_1: "
" movl $2, %0"
" next_1:"
" "
" jmp next_C"
" else_C: "
""
" cmpl 3*4(%%edx), %%eax "
" jae else_2"
" movl $3, %0"
" jmp next_2"
" else_2: "
" movl $4, %0"
" next_2:"
""
" next_C: "
""
" jmp next_F"
" else_F:"
""
" cmpl 6*4(%%edx), %%eax"
" jae else_E"
""
" cmpl 5*4(%%edx), %%eax"
" jae else_3"
" movl $5, %0 "
" jmp next_3"
" else_3: "
" movl $6, %0 "
" next_3:"
""
" jmp next_E"
" else_E: "
""
" cmpl 7*4(%%edx), %%eax"
" jae else_4"
" movl $7, %0 "
" jmp next_4"
" else_4: "
" movl $8, %0 "
" next_4:"
""
" next_E:"
""
" next_F:"
""
" jmp next_G"
" else_G:"
""
" cmpl 12*4(%%edx), %%eax"
" jae else_D"
""
" cmpl 10*4(%%edx), %%eax"
" jae else_B"
""
" cmpl 9*4(%%edx), %%eax"
" jae else_5"
" movl $9, %0 "
" jmp next_5"
" else_5: "
" movl $10, %0 "
" next_5:"
""
" jmp next_B"
" else_B: "
""
" cmpl 11*4(%%edx), %%eax"
" "
" jae else_6"
" movl $11, %0 "
" jmp next_6"
" else_6: "
" movl $12, %0 "
" next_6:"
""
" next_B:"
" "
" "
" jmp next_D"
" else_D: "
""
" cmpl 14*4(%%edx), %%eax"
" jae else_A"
""
" cmpl 13*4(%%edx), %%eax"
" jae else_7"
" movl $13, %0"
" jmp next_7"
" else_7: "
" movl $14, %0"
" next_7:"
""
" jmp next_A"
" else_A: "
" movl $15, %0 "
" next_A:"
" "
" next_D: "
" next_G:"
: "=g" (I), "=r"(N)
: "eax" ((long)BitField), "edx"((long)Deco->DecodeLen)
: "memory"
);
#endif /* #ifdef _WIN_32 ... #elif defined _X86_ASM_ */
#else
N=BitField & 0xFFFE;
if (N<Deco->DecodeLen[8]) {
if (N<Deco->DecodeLen[4]) {
if (N<Deco->DecodeLen[2]) {
if (N<Deco->DecodeLen[1])
I=1;
else
I=2;
} else {
if (N<Deco->DecodeLen[3])
I=3;
else
I=4;
}
} else {
if (N<Deco->DecodeLen[6]) {
if (N<Deco->DecodeLen[5])
I=5;
else
I=6;
} else {
if (N<Deco->DecodeLen[7])
I=7;
else
I=8;
}
}
} else {
if (N<Deco->DecodeLen[12]) {
if (N<Deco->DecodeLen[10]) {
if (N<Deco->DecodeLen[9])
I=9;
else
I=10;
} else {
if (N<Deco->DecodeLen[11])
I=11;
else
I=12;
}
} else {
if (N<Deco->DecodeLen[14]) {
if (N<Deco->DecodeLen[13])
I=13;
else
I=14;
} else {
I=15;
}
}
}
#endif
AddBits(I);
if ((N=Deco->DecodePos[I]+((N-Deco->DecodeLen[I-1])>>(16-I)))>=Deco->MaxNum)
N=0;
Number=Deco->DecodeNum[N];
}
void UnpInitData()
{
InAddr=InBit=0;
if (!(NewLhd.Flags & LHD_SOLID))
{
ChannelDelta=CurChannel=0;
#ifdef _USE_ASM
#ifdef _WIN_32 /* Win32 with VisualC */
__asm {
push edi
push eax
push ecx
cld /* increment EDI and ESI */
mov al, 0x00
mov ecx, SIZE AudV
mov edi, Offset AudV
rep stosb /* clear memory */
mov ecx, SIZE OldDist
mov edi, Offset OldDist
rep stosb /* clear memory */
mov ecx, SIZE UnpOldTable
mov edi, Offset UnpOldTable
rep stosb /* clear memory */
pop ecx
pop eax
pop edi
mov [OldDistPtr], 0
mov [LastDist], 0
mov [LastLength], 0
mov [UnpPtr], 0
mov [WrPtr], 0
mov [OldDistPtr], 0
mov [LastLength], 0
mov [LastDist], 0
mov [UnpPtr], 0
mov [WrPtr], 0
}
memset(UnpBuf,0,MAXWINSIZE);
#else /* unix/linux on i386 cpus */
__asm__ __volatile (
" cld /* increment EDI and ESI */"
" movb $0x00, %%al"
" movl %0, %%ecx"
" movl %1, %%edi"
" rep "
" stosb /* clear memory */"
""
" movl %2, %%ecx"
" mov %3, %%edi"
" rep "
" stosb /* clear memory */"
""
" movl %4, %%ecx"
" movl %5, %%edi"
" rep "
" stosb /* clear memory */"
""
" movl $0, (OldDistPtr)"
" movl $0, (LastDist)"
" movl $0, (LastLength)"
" movl $0, (UnpPtr)"
" movl $0, (WrPtr)"
" movl $0, (OldDistPtr)"
" movl $0, (LastLength)"
" movl $0, (LastDist)"
" movl $0, (UnpPtr)"
" movl $0, (WrPtr)"
:
: "m" ((long)sizeof(AudV)),
"m" ((long)AudV),
"m" ((long)sizeof(OldDist)),
"m" ((long)OldDist),
"m" ((long)sizeof(UnpOldTable)),
"m" ((long)UnpOldTable)
: "memory", "edi", "eax", "ecx"
);
memset(UnpBuf,0,MAXWINSIZE);
#endif
#else /* unix/linux on non-i386 cpu */
memset(AudV,0,sizeof(AudV));
memset(OldDist,0,sizeof(OldDist));
OldDistPtr=0;
LastDist=LastLength=0;
memset(UnpBuf,0,MAXWINSIZE);
memset(UnpOldTable,0,sizeof(UnpOldTable));
UnpPtr=WrPtr=0;
#endif
}
}
UBYTE DecodeAudio(int Delta)
{
struct AudioVariables *V;
unsigned int Ch;
unsigned int NumMinDif,MinDif;
int PCh,I;
V=&AudV[CurChannel];
V->ByteCount++;
V->D4=V->D3;
V->D3=V->D2;
V->D2=V->LastDelta-V->D1;
V->D1=V->LastDelta;
PCh=8*V->LastChar+V->K1*V->D1+V->K2*V->D2+
V->K3*V->D3+V->K4*V->D4+V->K5*ChannelDelta;
PCh=(PCh>>3) & 0xFF;
Ch=PCh-Delta;
I=((signed char)Delta)<<3;
V->Dif[0]+=abs(I);
V->Dif[1]+=abs(I-V->D1);
V->Dif[2]+=abs(I+V->D1);
V->Dif[3]+=abs(I-V->D2);
V->Dif[4]+=abs(I+V->D2);
V->Dif[5]+=abs(I-V->D3);
V->Dif[6]+=abs(I+V->D3);
V->Dif[7]+=abs(I-V->D4);
V->Dif[8]+=abs(I+V->D4);
V->Dif[9]+=abs(I-ChannelDelta);
V->Dif[10]+=abs(I+ChannelDelta);
ChannelDelta=V->LastDelta=(signed char)(Ch-V->LastChar);
V->LastChar=Ch;
if ((V->ByteCount & 0x1F)==0)
{
MinDif=V->Dif[0];
NumMinDif=0;
V->Dif[0]=0;
for (I=1;(unsigned int)I<sizeof(V->Dif)/sizeof(V->Dif[0]);I++)
{
if (V->Dif[I]<MinDif)
{
MinDif=V->Dif[I];
NumMinDif=I;
}
V->Dif[I]=0;
}
switch(NumMinDif)
{
case 1:
if (V->K1>=-16)
V->K1--;
break;
case 2:
if (V->K1<16)
V->K1++;
break;
case 3:
if (V->K2>=-16)
V->K2--;
break;
case 4:
if (V->K2<16)
V->K2++;
break;
case 5:
if (V->K3>=-16)
V->K3--;
break;
case 6:
if (V->K3<16)
V->K3++;
break;
case 7:
if (V->K4>=-16)
V->K4--;
break;
case 8:
if (V->K4<16)
V->K4++;
break;
case 9:
if (V->K5>=-16)
V->K5--;
break;
case 10:
if (V->K5<16)
V->K5++;
break;
}
}
return((UBYTE)Ch);
}
/* ***************************************************
* ** CRCCrypt Code - decryption engine starts here **
* ***************************************************/
#define NROUNDS 32
#define rol(x,n) (((x)<<(n)) | ((x)>>(8*sizeof(x)-(n))))
#define ror(x,n) (((x)>>(n)) | ((x)<<(8*sizeof(x)-(n))))
#define substLong(t) ( (UDWORD)SubstTable[(int)t&255] | \
((UDWORD)SubstTable[(int)(t>> 8)&255]<< 8) | \
((UDWORD)SubstTable[(int)(t>>16)&255]<<16) | \
((UDWORD)SubstTable[(int)(t>>24)&255]<<24) )
UDWORD CRCTab[256];
UBYTE SubstTable[256];
UBYTE InitSubstTable[256]={
215, 19,149, 35, 73,197,192,205,249, 28, 16,119, 48,221, 2, 42,
232, 1,177,233, 14, 88,219, 25,223,195,244, 90, 87,239,153,137,
255,199,147, 70, 92, 66,246, 13,216, 40, 62, 29,217,230, 86, 6,
71, 24,171,196,101,113,218,123, 93, 91,163,178,202, 67, 44,235,
107,250, 75,234, 49,167,125,211, 83,114,157,144, 32,193,143, 36,
158,124,247,187, 89,214,141, 47,121,228, 61,130,213,194,174,251,
97,110, 54,229,115, 57,152, 94,105,243,212, 55,209,245, 63, 11,
164,200, 31,156, 81,176,227, 21, 76, 99,139,188,127, 17,248, 51,
207,120,189,210, 8,226, 41, 72,183,203,135,165,166, 60, 98, 7,
122, 38,155,170, 69,172,252,238, 39,134, 59,128,236, 27,240, 80,
131, 3, 85,206,145, 79,154,142,159,220,201,133, 74, 64, 20,129,
224,185,138,103,173,182, 43, 34,254, 82,198,151,231,180, 58, 10,
118, 26,102, 12, 50,132, 22,191,136,111,162,179, 45, 4,148,108,
161, 56, 78,126,242,222, 15,175,146, 23, 33,241,181,190, 77,225,
0, 46,169,186, 68, 95,237, 65, 53,208,253,168, 9, 18,100, 52,
116,184,160, 96,109, 37, 30,106,140,104,150, 5,204,117,112, 84
};
UDWORD Key[4];
void EncryptBlock(UBYTE *Buf)
{
int I;
UDWORD A,B,C,D,T,TA,TB;
#ifdef NON_INTEL_BYTE_ORDER
A=((UDWORD)Buf[0]|((UDWORD)Buf[1]<<8)|((UDWORD)Buf[2]<<16)|
((UDWORD)Buf[3]<<24))^Key[0];
B=((UDWORD)Buf[4]|((UDWORD)Buf[5]<<8)|((UDWORD)Buf[6]<<16)|
((UDWORD)Buf[7]<<24))^Key[1];
C=((UDWORD)Buf[8]|((UDWORD)Buf[9]<<8)|((UDWORD)Buf[10]<<16)|
((UDWORD)Buf[11]<<24))^Key[2];
D=((UDWORD)Buf[12]|((UDWORD)Buf[13]<<8)|((UDWORD)Buf[14]<<16)|
((UDWORD)Buf[15]<<24))^Key[3];
#else
UDWORD *BufPtr;
BufPtr=(UDWORD *)Buf;
A=BufPtr[0]^Key[0];
B=BufPtr[1]^Key[1];
C=BufPtr[2]^Key[2];
D=BufPtr[3]^Key[3];
#endif
for(I=0;I<NROUNDS;I++)
{
T=((C+rol(D,11))^Key[I&3]);
TA=A^substLong(T);
T=((D^rol(C,17))+Key[I&3]);
TB=B^substLong(T);
A=C;
B=D;
C=TA;
D=TB;
}
#ifdef NON_INTEL_BYTE_ORDER
C^=Key[0];
Buf[0]=(UBYTE)C;
Buf[1]=(UBYTE)(C>>8);
Buf[2]=(UBYTE)(C>>16);
Buf[3]=(UBYTE)(C>>24);
D^=Key[1];
Buf[4]=(UBYTE)D;
Buf[5]=(UBYTE)(D>>8);
Buf[6]=(UBYTE)(D>>16);
Buf[7]=(UBYTE)(D>>24);
A^=Key[2];
Buf[8]=(UBYTE)A;
Buf[9]=(UBYTE)(A>>8);
Buf[10]=(UBYTE)(A>>16);
Buf[11]=(UBYTE)(A>>24);
B^=Key[3];
Buf[12]=(UBYTE)B;
Buf[13]=(UBYTE)(B>>8);
Buf[14]=(UBYTE)(B>>16);
Buf[15]=(UBYTE)(B>>24);
#else
BufPtr[0]=C^Key[0];
BufPtr[1]=D^Key[1];
BufPtr[2]=A^Key[2];
BufPtr[3]=B^Key[3];
#endif
UpdKeys(Buf);
}
void DecryptBlock(UBYTE *Buf)
{
int I;
UBYTE InBuf[16];
UDWORD A,B,C,D,T,TA,TB;
#ifdef NON_INTEL_BYTE_ORDER
A=((UDWORD)Buf[0]|((UDWORD)Buf[1]<<8)|((UDWORD)Buf[2]<<16)|
((UDWORD)Buf[3]<<24))^Key[0];
B=((UDWORD)Buf[4]|((UDWORD)Buf[5]<<8)|((UDWORD)Buf[6]<<16)|
((UDWORD)Buf[7]<<24))^Key[1];
C=((UDWORD)Buf[8]|((UDWORD)Buf[9]<<8)|((UDWORD)Buf[10]<<16)|
((UDWORD)Buf[11]<<24))^Key[2];
D=((UDWORD)Buf[12]|((UDWORD)Buf[13]<<8)|((UDWORD)Buf[14]<<16)|
((UDWORD)Buf[15]<<24))^Key[3];
#else
UDWORD *BufPtr;
BufPtr=(UDWORD *)Buf;
A=BufPtr[0]^Key[0]; /* xxx may be this can be */
B=BufPtr[1]^Key[1]; /* optimized in assembler */
C=BufPtr[2]^Key[2];
D=BufPtr[3]^Key[3];
#endif
memcpy(InBuf,Buf,sizeof(InBuf));
for(I=NROUNDS-1;I>=0;I--)
{
T=((C+rol(D,11))^Key[I&3]);
TA=A^substLong(T);
T=((D^rol(C,17))+Key[I&3]);
TB=B^substLong(T);
A=C;
B=D;
C=TA;
D=TB;
}
#ifdef NON_INTEL_BYTE_ORDER
C^=Key[0];
Buf[0]=(UBYTE)C;
Buf[1]=(UBYTE)(C>>8);
Buf[2]=(UBYTE)(C>>16);
Buf[3]=(UBYTE)(C>>24);
D^=Key[1];
Buf[4]=(UBYTE)D;
Buf[5]=(UBYTE)(D>>8);
Buf[6]=(UBYTE)(D>>16);
Buf[7]=(UBYTE)(D>>24);
A^=Key[2];
Buf[8]=(UBYTE)A;
Buf[9]=(UBYTE)(A>>8);
Buf[10]=(UBYTE)(A>>16);
Buf[11]=(UBYTE)(A>>24);
B^=Key[3];
Buf[12]=(UBYTE)B;
Buf[13]=(UBYTE)(B>>8);
Buf[14]=(UBYTE)(B>>16);
Buf[15]=(UBYTE)(B>>24);
#else
BufPtr[0]=C^Key[0];
BufPtr[1]=D^Key[1];
BufPtr[2]=A^Key[2];
BufPtr[3]=B^Key[3];
#endif
UpdKeys(InBuf);
}
void UpdKeys(UBYTE *Buf)
{
int I;
for (I=0;I<16;I+=4)
{
Key[0]^=CRCTab[Buf[I]]; /* xxx may be I'll rewrite this */
Key[1]^=CRCTab[Buf[I+1]]; /* in asm for speedup */
Key[2]^=CRCTab[Buf[I+2]];
Key[3]^=CRCTab[Buf[I+3]];
}
}
void SetCryptKeys(char *Password)
{
unsigned int I,J,K,PswLength;
unsigned char N1,N2;
unsigned char Psw[256];
#if !defined _USE_ASM
UBYTE Ch;
#endif
SetOldKeys(Password);
Key[0]=0xD3A3B879L;
Key[1]=0x3F6D12F7L;
Key[2]=0x7515A235L;
Key[3]=0xA4E7F123L;
memset(Psw,0,sizeof(Psw));
strcpy((char *)Psw,Password);
PswLength=strlen(Password);
memcpy(SubstTable,InitSubstTable,sizeof(SubstTable));
for (J=0;J<256;J++)
for (I=0;I<PswLength;I+=2)
{
N2=(unsigned char)CRCTab[(Psw[I+1]+J)&0xFF];
for (K=1, N1=(unsigned char)CRCTab[(Psw[I]-J)&0xFF];
(N1!=N2) && (N1 < 256); /* I had to add "&& (N1 < 256)", */
N1++, K++) /* because the system crashed with */
{ /* encrypted RARs */
#ifdef _USE_ASM
#ifdef _WIN_32
__asm {
mov ebx, Offset SubstTable
mov edx, ebx
xor ecx, ecx // read SubstTable[N1]...
mov cl, N1
add ebx, ecx
mov al, byte ptr[ebx]
mov cl, N1 // read SubstTable[(N1+I+K)&0xFF]...
add ecx, I
add ecx, K
and ecx, 0xFF
add edx, ecx
mov ah, byte ptr[edx]
mov byte ptr[ebx], ah // and write back
mov byte ptr[edx], al
}
#else
__asm__ __volatile__ (
" xorl %%ecx, %%ecx"
" movl %2, %%ecx /* ecx = N1 */"
" mov %%ebx, %%edx"
" addl %%ecx, %%ebx"
""
" addl %0, %%ecx"
" addl %1, %%ecx"
" andl $0x000000FF, %%ecx"
" addl %%ecx, %%edx"
" "
" movb (%%ebx), %%al"
" movb (%%edx), %%ah"
""
" movb %%ah, (%%ebx) /* and write back */"
" movb %%al, (%%edx)"
: : "g" ((long)I),
"g" ((long)K),
"g" ((long)N1),
"ebx"((long)SubstTable)
: "ecx", "edx"
);
#endif
#else
/* Swap(&SubstTable[N1],&SubstTable[(N1+I+K)&0xFF]); */
Ch=SubstTable[N1];
SubstTable[N1]=SubstTable[(N1+I+K)&0xFF];
SubstTable[(N1+I+K)&0xFF]=Ch;
#endif
}
}
for (I=0;I<PswLength;I+=16)
EncryptBlock(&Psw[I]);
}
void SetOldKeys(char *Password)
{
UDWORD PswCRC;
UBYTE Ch;
PswCRC=CalcCRC32(0xFFFFFFFFL,(UBYTE*)Password,strlen(Password));
OldKey[0]=(UWORD)PswCRC;
OldKey[1]=(UWORD)(PswCRC>>16);
OldKey[2]=OldKey[3]=0;
PN1=PN2=PN3=0;
while ((Ch=*Password)!=0)
{
PN1+=Ch;
PN2^=Ch;
PN3+=Ch;
PN3=(UBYTE)rol(PN3,1);
OldKey[2]^=((UWORD)(Ch^CRCTab[Ch]));
OldKey[3]+=((UWORD)(Ch+(CRCTab[Ch]>>16)));
Password++;
}
}
void InitCRC(void)
{
int I, J;
UDWORD C;
for (I=0;I<256;I++)
{
for (C=I,J=0;J<8;J++)
C=(C & 1) ? (C>>1)^0xEDB88320L : (C>>1);
CRCTab[I]=C;
}
}
UDWORD CalcCRC32(UDWORD StartCRC,UBYTE *Addr,UDWORD Size)
{
unsigned int I;
for (I=0; I<Size; I++)
StartCRC = CRCTab[(UBYTE)StartCRC ^ Addr[I]] ^ (StartCRC >> 8);
return(StartCRC);
}
/* **************************************************************************
****************************************************************************
****************************************************************************
************************************************************************** */
/* **************************************************************************
****************************************************************************
****************************************************************************
****************************************************************************
******* *******
******* *******
******* *******
******* D E B U G F U N C T I O N S *******
******* *******
******* *******
******* *******
****************************************************************************
****************************************************************************
****************************************************************************
************************************************************************** */
#ifdef _DEBUG_LOG
/* -- global stuff -------------------------------------------------------- */
char log_file_name[256]; /* file name for the log file */
DWORD debug_start_time; /* starttime of debug */
BOOL debug_started = FALSE; /* debug_log writes only if */
/* this is TRUE */
/* ------------------------------------------------------------------------ */
/* -- global functions ---------------------------------------------------- */
void debug_init_proc(char *file_name)
/* Create/Rewrite a log file */
{
FILE *fp;
char date[] = __DATE__;
char time[] = __TIME__;
debug_start_time = GetTickCount(); /* get start time */
strcpy(log_file_name, file_name); /* save file name */
if((fp = fopen(log_file_name, CREATETEXT)) != NULL)
{
debug_started = TRUE; /* enable debug */
fprintf(fp, "Debug log of UniquE's RARFileLib\n"\
"~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~\n");
fprintf(fp, "(executable compiled on %s at %s)\n\n", date, time);
fclose(fp);
}
}
void debug_log_proc(char *text, char *sourcefile, int sourceline)
/* add a line to the log file */
{
FILE *fp;
if(debug_started == FALSE) return; /* exit if not initialized */
if((fp = fopen(log_file_name, APPENDTEXT)) != NULL) /* append to logfile */
{
fprintf(fp, " %8u ms (line %u in %s):\n - %s\n",
(unsigned int)(GetTickCount() - debug_start_time),
sourceline, sourcefile, text);
fclose(fp);
}
}
/* ------------------------------------------------------------------------ */
#endif
/* **************************************************************************
****************************************************************************
****************************************************************************
************************************************************************** */
/* end of file urarlib.c */
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