diff options
Diffstat (limited to 'programs')
| -rw-r--r-- | programs/lz4io.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/programs/lz4io.c b/programs/lz4io.c index 9f80531..b1067ac 100644 --- a/programs/lz4io.c +++ b/programs/lz4io.c @@ -62,6 +62,27 @@ #include "lz4frame.h" +/************************************** + Basic Types +**************************************/ +#if defined(LZ4IO_ENABLE_SPARSE_FILE) +#if defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */ +# include <stdint.h> + typedef uint8_t BYTE; + typedef uint16_t U16; + typedef uint32_t U32; + typedef int32_t S32; + typedef uint64_t U64; +#else + typedef unsigned char BYTE; + typedef unsigned short U16; + typedef unsigned int U32; + typedef signed int S32; + typedef unsigned long long U64; +#endif +#endif /* LZ4IO_ENABLE_SPARSE_FILE */ + + /**************************** * OS-specific Includes *****************************/ @@ -198,6 +219,7 @@ int LZ4IO_setSparseFile(int yes) static int isSparse(const void* p, size_t size) { +#if 0 const char* p8 = p; for(; size; --size) { @@ -208,6 +230,30 @@ static int isSparse(const void* p, size_t size) ++p8; } return 1; +#else + const U64* p64 = (const U64*) p; + const char* p8 = (const char*) p; + const size_t n = size / sizeof(*p64); + size_t i; + + for (i = 0; i < n; ++i) + { + if (p64[i] != 0) + { + return 0; + } + } + + for(i = n * sizeof(*p64); i < size; ++i) + { + if (p8[i] != 0) + { + return 0; + } + } + + return 1; +#endif } #endif /* LZ4IO_ENABLE_SPARSE_FILE */ |