lib/lz4/lz4_decompress.c

460 int LZ4_decompress_safe(const char *source, char *dest,
463 	return LZ4_decompress_generic(source, dest,
466 				      noDict, (BYTE *)dest, NULL, 0);
478 int LZ4_decompress_fast(const char *source, char *dest, int originalSize)
480 	return LZ4_decompress_generic(source, dest, 0, originalSize,
483 				      (BYTE *)dest - 64 * KB, NULL, 0);
488 static int LZ4_decompress_safe_withPrefix64k(const char *source, char *dest,
491 	return LZ4_decompress_generic(source, dest,
495 				      (BYTE *)dest - 64 * KB, NULL, 0);
498 static int LZ4_decompress_safe_withSmallPrefix(const char *source, char *dest,
503 	return LZ4_decompress_generic(source, dest,
507 				      (BYTE *)dest - prefixSize, NULL, 0);
510 static int LZ4_decompress_safe_forceExtDict(const char *source, char *dest,
514 	return LZ4_decompress_generic(source, dest,
517 				      usingExtDict, (BYTE *)dest,
521 static int LZ4_decompress_fast_extDict(const char *source, char *dest,
525 	return LZ4_decompress_generic(source, dest,
528 				      usingExtDict, (BYTE *)dest,
538 int LZ4_decompress_safe_doubleDict(const char *source, char *dest,
543 	return LZ4_decompress_generic(source, dest,
546 				      usingExtDict, (BYTE *)dest - prefixSize,
551 int LZ4_decompress_fast_doubleDict(const char *source, char *dest,
555 	return LZ4_decompress_generic(source, dest,
558 				      usingExtDict, (BYTE *)dest - prefixSize,
588 	const char *source, char *dest, int compressedSize, int maxOutputSize)
597 		result = LZ4_decompress_safe(source, dest,
602 		lz4sd->prefixEnd = (BYTE *)dest + result;
603 	} else if (lz4sd->prefixEnd == (BYTE *)dest) {
606 			result = LZ4_decompress_safe_withPrefix64k(source, dest,
610 				dest, compressedSize, maxOutputSize,
613 			result = LZ4_decompress_safe_doubleDict(source, dest,
628 		result = LZ4_decompress_safe_forceExtDict(source, dest,
634 		lz4sd->prefixEnd  = (BYTE *)dest + result;
641 	const char *source, char *dest, int originalSize)
648 		result = LZ4_decompress_fast(source, dest, originalSize);
652 		lz4sd->prefixEnd = (BYTE *)dest + originalSize;
653 	} else if (lz4sd->prefixEnd == (BYTE *)dest) {
656 			result = LZ4_decompress_fast(source, dest,
659 			result = LZ4_decompress_fast_doubleDict(source, dest,
669 		result = LZ4_decompress_fast_extDict(source, dest,
674 		lz4sd->prefixEnd = (BYTE *)dest + originalSize;
679 int LZ4_decompress_safe_usingDict(const char *source, char *dest,
684 		return LZ4_decompress_safe(source, dest,
686 	if (dictStart+dictSize == dest) {
688 			return LZ4_decompress_safe_withPrefix64k(source, dest,
690 		return LZ4_decompress_safe_withSmallPrefix(source, dest,
693 	return LZ4_decompress_safe_forceExtDict(source, dest,
697 int LZ4_decompress_fast_usingDict(const char *source, char *dest,
701 	if (dictSize == 0 || dictStart + dictSize == dest)
702 		return LZ4_decompress_fast(source, dest, originalSize);
704 	return LZ4_decompress_fast_extDict(source, dest, originalSize,