int DoBdiff( const char *srcPath, const char *tgtPath, const char *name )
{
long savings;
foff buffsize;
int i;
// if( !MsgInit() ) exit( EXIT_FAILURE );
/* initialize static variables each time */
SimilarRegions = NULL;
DiffRegions = NULL;
HoleRegions = NULL;
SimilarSize = 0;
NumHoles = 0;
NumDiffs = 0;
DiffSize = 0;
HolesInRegion = 0;
HoleHeaders = 0;
for( i = 0; i < 3; i += 1 ) {
HoleCount[i] = 0;
}
init_diff();
newName = name;
EndOld = FileSize( srcPath, &OldCorrection );
EndNew = FileSize( tgtPath, &NewCorrection );
buffsize = ( EndOld > EndNew ) ? ( EndOld ) : ( EndNew );
buffsize += sizeof( PATCH_LEVEL );
OldFile = ReadIn( srcPath, buffsize, EndOld );
NewFile = ReadIn( tgtPath, buffsize, EndNew );
ScanSyncString( SyncString );
FindRegions();
if( NumHoles == 0 && DiffSize == 0 && EndOld == EndNew ) {
printf( "Patch file not created - files are identical\n" );
MsgFini();
exit( EXIT_SUCCESS );
}
MakeHoleArray();
SortHoleArray();
ProcessHoleArray( 0 );
savings = HolesToDiffs();
WritePatchFile( "", newName );
FreeHoleArray();
VerifyCorrect( tgtPath );
print_stats( savings );
MsgFini();
return ( EXIT_SUCCESS );
}
void main( int argc, char **argv )
{
long savings;
foff buffsize;
algorithm alg;
if( !MsgInit() )
exit( EXIT_FAILURE );
alg = ParseArgs( argc, argv );
EndOld = FileSize( argv[1], &OldCorrection );
EndNew = FileSize( argv[2], &NewCorrection );
buffsize = ( EndOld > EndNew ) ? ( EndOld ) : ( EndNew );
buffsize += sizeof( PATCH_LEVEL );
OldFile = ReadIn( argv[1], buffsize, EndOld );
NewFile = ReadIn( argv[2], buffsize, EndNew );
ScanSyncString( SyncString );
switch( alg ) {
case ALG_NOTHING:
FindRegions();
break;
#ifdef USE_DBGINFO
case ALG_ONLY_NEW:
case ALG_BOTH:
SymbolicDiff( alg, argv[1], argv[2] );
break;
#endif
}
if( NumHoles == 0 && DiffSize == 0 && EndOld == EndNew ) {
printf( "Patch file not created - files are identical\n" );
MsgFini();
exit( EXIT_SUCCESS );
}
MakeHoleArray();
SortHoleArray();
ProcessHoleArray( 0 );
savings = HolesToDiffs();
WritePatchFile( argv[3], newName );
FreeHoleArray();
VerifyCorrect( argv[2] );
print_stats( savings );
MsgFini();
exit( EXIT_SUCCESS );
}
PATCH_RET_CODE Execute( byte *dest )
{
char *tmp;
#else
PATCH_RET_CODE Execute( void )
{
char tmp[4];
#if defined(__386__)
#if defined(_WPATCH)
extern MY_FILE NewFile;
#define InNew( offset ) ( Input( &NewFile, tmp, offset, \
sizeof(hole)), \
*(hole*)tmp )
#define OutNew( off, x, type ) *(type*)tmp = (x); \
Output( &NewFile, tmp, \
off, sizeof( type ) );
#else
extern byte *NewFile;
#define OutNew( off, x, type ) *(type*)(NewFile+off) = (x);
#define InNew( off ) *(hole*)(NewFile+off)
#endif
#elif defined(BDUMP)
#define InNew( offset ) 1
#define OutNew( off, x, type ) ( x )
#undef Dump
#define Dump( x ) printf x
#undef DOPROMPT
#undef DOBACKUP
#define DOPROMPT 0
#define DOBACKUP 0
#else
extern MY_FILE NewFile;
extern void Input( MY_FILE *file, void *tmp, foff off, size_t len );
#define InNew( offset ) ( Input( &NewFile, tmp, offset, \
sizeof(hole)), \
*(hole*)tmp )
extern void Output( MY_FILE *file, void *tmp, foff off, size_t len );
#define OutNew( off, x, type ) *(type*)tmp = (x); \
Output( &NewFile, tmp, \
off, sizeof( type ) );
#endif
#endif
patch_cmd cmd;
byte next;
hole diff;
foff size;
foff incr;
foff iters;
foff old_size;
foff new_size;
foff checksum;
foff new_offset;
foff old_offset;
char ch;
int havenew;
PATCH_RET_CODE ret;
PATCH_RET_CODE ret2;
#ifdef BDIFF
char *dummy = NULL;
#endif
havenew = 1;
#ifdef BDIFF
InitPatch( &dummy );
#endif
old_size = InPatch( foff );
new_size = InPatch( foff );
checksum = InPatch( foff );
ret = OpenOld( old_size, DOPROMPT, new_size, checksum );
if( ret != PATCH_RET_OKAY ) goto error1;
ret = OpenNew( new_size );
if( ret != PATCH_RET_OKAY ) goto error2;
InitHoles();
for( ;; ) {
#if defined( INSTALL_PROGRAM )
#if defined( WINNT ) || defined( WIN ) || defined( OS2 )
if( StatusCancelled() ) {
ret = PATCH_RET_CANCEL;
goto error3;
}
#endif
#endif
cmd = InPatch( patch_cmd );
if( cmd == CMD_DONE ) break;
switch( cmd ) {
case CMD_DIFFS:
new_offset = InPatch( foff );
size = InPatch( foff );
Dump(( "Different new-%8.8lx size-%8.8lx\n", new_offset, size ));
while( size != 0 ) {
OutNew( new_offset, InPatch( byte ), byte );
++new_offset;
--size;
}
break;
case CMD_SAMES:
new_offset = InPatch( foff );
old_offset = InPatch( foff );
size = InPatch( foff );
Dump(( "Similar new-%8.8lx old-%8.8lx size-%8.8lx\n",
new_offset, old_offset, size));
while( size != 0 ) {
OutNew( new_offset, InOld( old_offset ), byte );
++new_offset;
++old_offset;
--size;
}
break;
case CMD_ITER_HOLES:
new_offset = InPatch( foff );
diff = InPatch( hole );
iters = InPatch( foff );
incr = InPatch( foff );
ch = InPatch( byte );
Dump(( "IterHole new-%8.8lx diff-%8.8lx iter-%8.8lx inc-%8.8lx\n",
new_offset, diff, iters, incr ));
while( iters != 0 ) {
AddHole( new_offset, diff );
new_offset += incr;
--iters;
}
break;
case CMD_HOLES:
new_offset = InPatch( foff );
diff = InPatch( hole );
for( ;; ) {
Dump(( "Hole new-%8.8lx diff-%8.8lx\n",new_offset,diff));
AddHole( new_offset, diff );
next = InPatch( byte );
if( next == 0 ) break;
if( ( next & 0x80 ) == 0 ) {
new_offset += (foff)next & 0x7f;
} else if( ( next & 0x40 ) == 0 ) {
new_offset += ( (foff)next & 0x3f ) << 8;
new_offset += (foff)InPatch( byte );
} else {
new_offset += ( (foff)next & 0x3f ) << 16;
new_offset += (foff)InPatch(byte) << 8;
new_offset += (foff)InPatch(byte);
}
}
break;
default:
PatchError( ERR_BAD_PATCHFILE, PatchName );
ret = PATCH_BAD_PATCH_FILE;
goto error3;
}
}
ret = PATCH_RET_OKAY;
FlushHoles();
error3:
FreeHoleArray();
ret2 = CloseNew( new_size, checksum, &havenew );
if( ret == PATCH_RET_OKAY ) {
ret = ret2;
}
error2:
CloseOld( havenew && DOPROMPT, DOBACKUP );
error1:
ClosePatch();
return( ret );
}