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#import "Checksums.h"
@implementation CSHandle (Checksums)
-(BOOL)hasChecksum { return NO; }
-(BOOL)isChecksumCorrect { return YES; }
@end
@implementation CSSubHandle (Checksums)
-(BOOL)hasChecksum
{
off_t length=[parent fileSize];
if(length==CSHandleMaxLength) return NO;
return end==length&&[parent hasChecksum];
}
-(BOOL)isChecksumCorrect { return [parent isChecksumCorrect]; }
@end
@implementation CSStreamHandle (Checksums)
-(BOOL)hasChecksum
{
if(input) return [CSInputHandle(input) hasChecksum];
else return NO;
}
-(BOOL)isChecksumCorrect
{
if(input) return [CSInputHandle(input) isChecksumCorrect];
else return YES;
}
@end
@implementation CSChecksumWrapperHandle
-(id)initWithHandle:(CSHandle *)handle checksumHandle:(CSHandle *)checksumhandle
{
if((self=[super initWithName:[handle name]]))
{
parent=[handle retain];
checksum=[checksumhandle retain];
}
return self;
}
-(void)dealloc
{
[parent release];
[checksum release];
[super dealloc];
}
-(off_t)fileSize { return [parent fileSize]; }
-(off_t)offsetInFile { return [parent offsetInFile]; }
-(BOOL)atEndOfFile { return [parent atEndOfFile]; }
-(void)seekToFileOffset:(off_t)offs { [parent seekToFileOffset:offs]; }
-(void)seekToEndOfFile { [parent seekToEndOfFile]; }
-(void)pushBackByte:(int)byte { [parent pushBackByte:byte]; }
-(int)readAtMost:(int)num toBuffer:(void *)buffer { return [parent readAtMost:num toBuffer:buffer]; }
-(void)writeBytes:(int)num fromBuffer:(const void *)buffer { [parent writeBytes:num fromBuffer:buffer]; }
-(BOOL)hasChecksum { return [checksum hasChecksum]; }
-(BOOL)isChecksumCorrect { return [checksum isChecksumCorrect]; }
@end
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