diff options
| author | Yann Collet <cyan@fb.com> | 2016-11-04 00:14:25 (GMT) |
|---|---|---|
| committer | Yann Collet <cyan@fb.com> | 2016-11-04 00:14:25 (GMT) |
| commit | 258a5e7fa44825488fe4683f3a04c36fc944a23f (patch) | |
| tree | d48ba7b4000f104937463b20e9a2c6cde8fef8e2 /lib/lz4.c | |
| parent | 6f68a1692e58b0380e5f88d8be61656ead8331f4 (diff) | |
| download | lz4-258a5e7fa44825488fe4683f3a04c36fc944a23f.zip lz4-258a5e7fa44825488fe4683f3a04c36fc944a23f.tar.gz lz4-258a5e7fa44825488fe4683f3a04c36fc944a23f.tar.bz2 | |
updated comments
Diffstat (limited to 'lib/lz4.c')
| -rw-r--r-- | lib/lz4.c | 25 |
1 files changed, 12 insertions, 13 deletions
@@ -85,9 +85,10 @@ /*-************************************ -* Includes +* Dependency **************************************/ #include "lz4.h" +/* see also "memory routines" below */ /*-************************************ @@ -99,15 +100,13 @@ # pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */ # pragma warning(disable : 4293) /* disable: C4293: too large shift (32-bits) */ #else -# if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */ -# if defined(__GNUC__) || defined(__clang__) -# define FORCE_INLINE static inline __attribute__((always_inline)) -# else -# define FORCE_INLINE static inline -# endif +# if defined(__GNUC__) || defined(__clang__) +# define FORCE_INLINE static inline __attribute__((always_inline)) +# elif defined(__cplusplus) || (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) +# define FORCE_INLINE static inline # else # define FORCE_INLINE static -# endif /* __STDC_VERSION__ */ +# endif #endif /* _MSC_VER */ /* LZ4_GCC_VERSION is defined into lz4.h */ @@ -134,7 +133,7 @@ /*-************************************ * Basic Types **************************************/ -#if defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */ +#if defined(__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) # include <stdint.h> typedef uint8_t BYTE; typedef uint16_t U16; @@ -165,6 +164,7 @@ static unsigned LZ4_isLittleEndian(void) #if defined(LZ4_FORCE_MEMORY_ACCESS) && (LZ4_FORCE_MEMORY_ACCESS==2) +/* lie to the compiler about data alignment; use with caution */ static U16 LZ4_read16(const void* memPtr) { return *(const U16*) memPtr; } static U32 LZ4_read32(const void* memPtr) { return *(const U32*) memPtr; } @@ -186,7 +186,7 @@ static size_t LZ4_read_ARCH(const void* ptr) { return ((const unalign*)ptr)->uAr static void LZ4_write16(void* memPtr, U16 value) { ((unalign*)memPtr)->u16 = value; } static void LZ4_write32(void* memPtr, U32 value) { ((unalign*)memPtr)->u32 = value; } -#else +#else /* safe and portable access through memcpy() */ static U16 LZ4_read16(const void* memPtr) { @@ -242,7 +242,7 @@ static void LZ4_copy8(void* dst, const void* src) memcpy(dst,src,8); } -/* customized variant of memcpy, which can overwrite up to 7 bytes beyond dstEnd */ +/* customized variant of memcpy, which can overwrite up to 8 bytes beyond dstEnd */ static void LZ4_wildCopy(void* dstPtr, const void* srcPtr, void* dstEnd) { BYTE* d = (BYTE*)dstPtr; @@ -354,7 +354,7 @@ static unsigned LZ4_count(const BYTE* pIn, const BYTE* pMatch, const BYTE* pInLi const BYTE* const pStart = pIn; while (likely(pIn<pInLimit-(STEPSIZE-1))) { - size_t diff = LZ4_read_ARCH(pMatch) ^ LZ4_read_ARCH(pIn); + size_t const diff = LZ4_read_ARCH(pMatch) ^ LZ4_read_ARCH(pIn); if (!diff) { pIn+=STEPSIZE; pMatch+=STEPSIZE; continue; } pIn += LZ4_NbCommonBytes(diff); return (unsigned)(pIn - pStart); @@ -1475,4 +1475,3 @@ int LZ4_decompress_fast_withPrefix64k(const char* source, char* dest, int origin } #endif /* LZ4_COMMONDEFS_ONLY */ - |