10c16b537SWarner Losh /*
2*5ff13fbcSAllan Jude * Copyright (c) Yann Collet, Facebook, Inc.
30c16b537SWarner Losh * All rights reserved.
40c16b537SWarner Losh *
50c16b537SWarner Losh * This source code is licensed under both the BSD-style license (found in the
60c16b537SWarner Losh * LICENSE file in the root directory of this source tree) and the GPLv2 (found
70c16b537SWarner Losh * in the COPYING file in the root directory of this source tree).
80c16b537SWarner Losh * You may select, at your option, one of the above-listed licenses.
90c16b537SWarner Losh */
100c16b537SWarner Losh
110c16b537SWarner Losh #ifndef MEM_H_MODULE
120c16b537SWarner Losh #define MEM_H_MODULE
130c16b537SWarner Losh
140c16b537SWarner Losh #if defined (__cplusplus)
150c16b537SWarner Losh extern "C" {
160c16b537SWarner Losh #endif
170c16b537SWarner Losh
180c16b537SWarner Losh /*-****************************************
190c16b537SWarner Losh * Dependencies
200c16b537SWarner Losh ******************************************/
210c16b537SWarner Losh #include <stddef.h> /* size_t, ptrdiff_t */
22f7cd7fe5SConrad Meyer #include "compiler.h" /* __has_builtin */
23f7cd7fe5SConrad Meyer #include "debug.h" /* DEBUG_STATIC_ASSERT */
24f7cd7fe5SConrad Meyer #include "zstd_deps.h" /* ZSTD_memcpy */
250c16b537SWarner Losh
260c16b537SWarner Losh
270c16b537SWarner Losh /*-****************************************
280c16b537SWarner Losh * Compiler specifics
290c16b537SWarner Losh ******************************************/
300c16b537SWarner Losh #if defined(_MSC_VER) /* Visual Studio */
310c16b537SWarner Losh # include <stdlib.h> /* _byteswap_ulong */
320c16b537SWarner Losh # include <intrin.h> /* _byteswap_* */
330c16b537SWarner Losh #endif
340c16b537SWarner Losh #if defined(__GNUC__)
350c16b537SWarner Losh # define MEM_STATIC static __inline __attribute__((unused))
360c16b537SWarner Losh #elif defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
370c16b537SWarner Losh # define MEM_STATIC static inline
380c16b537SWarner Losh #elif defined(_MSC_VER)
390c16b537SWarner Losh # define MEM_STATIC static __inline
400c16b537SWarner Losh #else
410c16b537SWarner Losh # define MEM_STATIC static /* this version may generate warnings for unused static functions; disable the relevant warning */
420c16b537SWarner Losh #endif
430c16b537SWarner Losh
440c16b537SWarner Losh /*-**************************************************************
450c16b537SWarner Losh * Basic Types
460c16b537SWarner Losh *****************************************************************/
470c16b537SWarner Losh #if !defined (__VMS) && (defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) )
48f7cd7fe5SConrad Meyer # if defined(_AIX)
49f7cd7fe5SConrad Meyer # include <inttypes.h>
50f7cd7fe5SConrad Meyer # else
51f7cd7fe5SConrad Meyer # include <stdint.h> /* intptr_t */
52f7cd7fe5SConrad Meyer # endif
530c16b537SWarner Losh typedef uint8_t BYTE;
54*5ff13fbcSAllan Jude typedef uint8_t U8;
55*5ff13fbcSAllan Jude typedef int8_t S8;
560c16b537SWarner Losh typedef uint16_t U16;
570c16b537SWarner Losh typedef int16_t S16;
580c16b537SWarner Losh typedef uint32_t U32;
590c16b537SWarner Losh typedef int32_t S32;
600c16b537SWarner Losh typedef uint64_t U64;
610c16b537SWarner Losh typedef int64_t S64;
620c16b537SWarner Losh #else
630f743729SConrad Meyer # include <limits.h>
640f743729SConrad Meyer #if CHAR_BIT != 8
650f743729SConrad Meyer # error "this implementation requires char to be exactly 8-bit type"
660f743729SConrad Meyer #endif
670c16b537SWarner Losh typedef unsigned char BYTE;
68*5ff13fbcSAllan Jude typedef unsigned char U8;
69*5ff13fbcSAllan Jude typedef signed char S8;
700f743729SConrad Meyer #if USHRT_MAX != 65535
710f743729SConrad Meyer # error "this implementation requires short to be exactly 16-bit type"
720f743729SConrad Meyer #endif
730c16b537SWarner Losh typedef unsigned short U16;
740c16b537SWarner Losh typedef signed short S16;
750f743729SConrad Meyer #if UINT_MAX != 4294967295
760f743729SConrad Meyer # error "this implementation requires int to be exactly 32-bit type"
770f743729SConrad Meyer #endif
780c16b537SWarner Losh typedef unsigned int U32;
790c16b537SWarner Losh typedef signed int S32;
800f743729SConrad Meyer /* note : there are no limits defined for long long type in C90.
810f743729SConrad Meyer * limits exist in C99, however, in such case, <stdint.h> is preferred */
820c16b537SWarner Losh typedef unsigned long long U64;
830c16b537SWarner Losh typedef signed long long S64;
840c16b537SWarner Losh #endif
850c16b537SWarner Losh
860c16b537SWarner Losh
870c16b537SWarner Losh /*-**************************************************************
88f7cd7fe5SConrad Meyer * Memory I/O API
89f7cd7fe5SConrad Meyer *****************************************************************/
90f7cd7fe5SConrad Meyer /*=== Static platform detection ===*/
91f7cd7fe5SConrad Meyer MEM_STATIC unsigned MEM_32bits(void);
92f7cd7fe5SConrad Meyer MEM_STATIC unsigned MEM_64bits(void);
93f7cd7fe5SConrad Meyer MEM_STATIC unsigned MEM_isLittleEndian(void);
94f7cd7fe5SConrad Meyer
95f7cd7fe5SConrad Meyer /*=== Native unaligned read/write ===*/
96f7cd7fe5SConrad Meyer MEM_STATIC U16 MEM_read16(const void* memPtr);
97f7cd7fe5SConrad Meyer MEM_STATIC U32 MEM_read32(const void* memPtr);
98f7cd7fe5SConrad Meyer MEM_STATIC U64 MEM_read64(const void* memPtr);
99f7cd7fe5SConrad Meyer MEM_STATIC size_t MEM_readST(const void* memPtr);
100f7cd7fe5SConrad Meyer
101f7cd7fe5SConrad Meyer MEM_STATIC void MEM_write16(void* memPtr, U16 value);
102f7cd7fe5SConrad Meyer MEM_STATIC void MEM_write32(void* memPtr, U32 value);
103f7cd7fe5SConrad Meyer MEM_STATIC void MEM_write64(void* memPtr, U64 value);
104f7cd7fe5SConrad Meyer
105f7cd7fe5SConrad Meyer /*=== Little endian unaligned read/write ===*/
106f7cd7fe5SConrad Meyer MEM_STATIC U16 MEM_readLE16(const void* memPtr);
107f7cd7fe5SConrad Meyer MEM_STATIC U32 MEM_readLE24(const void* memPtr);
108f7cd7fe5SConrad Meyer MEM_STATIC U32 MEM_readLE32(const void* memPtr);
109f7cd7fe5SConrad Meyer MEM_STATIC U64 MEM_readLE64(const void* memPtr);
110f7cd7fe5SConrad Meyer MEM_STATIC size_t MEM_readLEST(const void* memPtr);
111f7cd7fe5SConrad Meyer
112f7cd7fe5SConrad Meyer MEM_STATIC void MEM_writeLE16(void* memPtr, U16 val);
113f7cd7fe5SConrad Meyer MEM_STATIC void MEM_writeLE24(void* memPtr, U32 val);
114f7cd7fe5SConrad Meyer MEM_STATIC void MEM_writeLE32(void* memPtr, U32 val32);
115f7cd7fe5SConrad Meyer MEM_STATIC void MEM_writeLE64(void* memPtr, U64 val64);
116f7cd7fe5SConrad Meyer MEM_STATIC void MEM_writeLEST(void* memPtr, size_t val);
117f7cd7fe5SConrad Meyer
118f7cd7fe5SConrad Meyer /*=== Big endian unaligned read/write ===*/
119f7cd7fe5SConrad Meyer MEM_STATIC U32 MEM_readBE32(const void* memPtr);
120f7cd7fe5SConrad Meyer MEM_STATIC U64 MEM_readBE64(const void* memPtr);
121f7cd7fe5SConrad Meyer MEM_STATIC size_t MEM_readBEST(const void* memPtr);
122f7cd7fe5SConrad Meyer
123f7cd7fe5SConrad Meyer MEM_STATIC void MEM_writeBE32(void* memPtr, U32 val32);
124f7cd7fe5SConrad Meyer MEM_STATIC void MEM_writeBE64(void* memPtr, U64 val64);
125f7cd7fe5SConrad Meyer MEM_STATIC void MEM_writeBEST(void* memPtr, size_t val);
126f7cd7fe5SConrad Meyer
127f7cd7fe5SConrad Meyer /*=== Byteswap ===*/
128f7cd7fe5SConrad Meyer MEM_STATIC U32 MEM_swap32(U32 in);
129f7cd7fe5SConrad Meyer MEM_STATIC U64 MEM_swap64(U64 in);
130f7cd7fe5SConrad Meyer MEM_STATIC size_t MEM_swapST(size_t in);
131f7cd7fe5SConrad Meyer
132f7cd7fe5SConrad Meyer
133f7cd7fe5SConrad Meyer /*-**************************************************************
134f7cd7fe5SConrad Meyer * Memory I/O Implementation
1350c16b537SWarner Losh *****************************************************************/
1360c16b537SWarner Losh /* MEM_FORCE_MEMORY_ACCESS :
1370c16b537SWarner Losh * By default, access to unaligned memory is controlled by `memcpy()`, which is safe and portable.
1380c16b537SWarner Losh * Unfortunately, on some target/compiler combinations, the generated assembly is sub-optimal.
1390c16b537SWarner Losh * The below switch allow to select different access method for improved performance.
1400c16b537SWarner Losh * Method 0 (default) : use `memcpy()`. Safe and portable.
1410c16b537SWarner Losh * Method 1 : `__packed` statement. It depends on compiler extension (i.e., not portable).
1420c16b537SWarner Losh * This method is safe if your compiler supports it, and *generally* as fast or faster than `memcpy`.
1430c16b537SWarner Losh * Method 2 : direct access. This method is portable but violate C standard.
1440c16b537SWarner Losh * It can generate buggy code on targets depending on alignment.
1450c16b537SWarner Losh * In some circumstances, it's the only known way to get the most performance (i.e. GCC + ARMv6)
1460c16b537SWarner Losh * See http://fastcompression.blogspot.fr/2015/08/accessing-unaligned-memory.html for details.
1470c16b537SWarner Losh * Prefer these methods in priority order (0 > 1 > 2)
1480c16b537SWarner Losh */
1490c16b537SWarner Losh #ifndef MEM_FORCE_MEMORY_ACCESS /* can be defined externally, on command line for example */
150*5ff13fbcSAllan Jude # if defined(__INTEL_COMPILER) || defined(__GNUC__) || defined(__ICCARM__)
1510c16b537SWarner Losh # define MEM_FORCE_MEMORY_ACCESS 1
1520c16b537SWarner Losh # endif
1530c16b537SWarner Losh #endif
1540c16b537SWarner Losh
MEM_32bits(void)1550c16b537SWarner Losh MEM_STATIC unsigned MEM_32bits(void) { return sizeof(size_t)==4; }
MEM_64bits(void)1560c16b537SWarner Losh MEM_STATIC unsigned MEM_64bits(void) { return sizeof(size_t)==8; }
1570c16b537SWarner Losh
MEM_isLittleEndian(void)1580c16b537SWarner Losh MEM_STATIC unsigned MEM_isLittleEndian(void)
1590c16b537SWarner Losh {
160*5ff13fbcSAllan Jude #if defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
161*5ff13fbcSAllan Jude return 1;
162*5ff13fbcSAllan Jude #elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
163*5ff13fbcSAllan Jude return 0;
164*5ff13fbcSAllan Jude #elif defined(__clang__) && __LITTLE_ENDIAN__
165*5ff13fbcSAllan Jude return 1;
166*5ff13fbcSAllan Jude #elif defined(__clang__) && __BIG_ENDIAN__
167*5ff13fbcSAllan Jude return 0;
168*5ff13fbcSAllan Jude #elif defined(_MSC_VER) && (_M_AMD64 || _M_IX86)
169*5ff13fbcSAllan Jude return 1;
170*5ff13fbcSAllan Jude #elif defined(__DMC__) && defined(_M_IX86)
171*5ff13fbcSAllan Jude return 1;
172*5ff13fbcSAllan Jude #else
1730c16b537SWarner Losh const union { U32 u; BYTE c[4]; } one = { 1 }; /* don't use static : performance detrimental */
1740c16b537SWarner Losh return one.c[0];
175*5ff13fbcSAllan Jude #endif
1760c16b537SWarner Losh }
1770c16b537SWarner Losh
1780c16b537SWarner Losh #if defined(MEM_FORCE_MEMORY_ACCESS) && (MEM_FORCE_MEMORY_ACCESS==2)
1790c16b537SWarner Losh
1800c16b537SWarner Losh /* violates C standard, by lying on structure alignment.
1810c16b537SWarner Losh Only use if no other choice to achieve best performance on target platform */
MEM_read16(const void * memPtr)1820c16b537SWarner Losh MEM_STATIC U16 MEM_read16(const void* memPtr) { return *(const U16*) memPtr; }
MEM_read32(const void * memPtr)1830c16b537SWarner Losh MEM_STATIC U32 MEM_read32(const void* memPtr) { return *(const U32*) memPtr; }
MEM_read64(const void * memPtr)1840c16b537SWarner Losh MEM_STATIC U64 MEM_read64(const void* memPtr) { return *(const U64*) memPtr; }
MEM_readST(const void * memPtr)1850c16b537SWarner Losh MEM_STATIC size_t MEM_readST(const void* memPtr) { return *(const size_t*) memPtr; }
1860c16b537SWarner Losh
MEM_write16(void * memPtr,U16 value)1870c16b537SWarner Losh MEM_STATIC void MEM_write16(void* memPtr, U16 value) { *(U16*)memPtr = value; }
MEM_write32(void * memPtr,U32 value)1880c16b537SWarner Losh MEM_STATIC void MEM_write32(void* memPtr, U32 value) { *(U32*)memPtr = value; }
MEM_write64(void * memPtr,U64 value)1890c16b537SWarner Losh MEM_STATIC void MEM_write64(void* memPtr, U64 value) { *(U64*)memPtr = value; }
1900c16b537SWarner Losh
1910c16b537SWarner Losh #elif defined(MEM_FORCE_MEMORY_ACCESS) && (MEM_FORCE_MEMORY_ACCESS==1)
1920c16b537SWarner Losh
1930c16b537SWarner Losh /* __pack instructions are safer, but compiler specific, hence potentially problematic for some compilers */
1940c16b537SWarner Losh /* currently only defined for gcc and icc */
1950c16b537SWarner Losh #if defined(_MSC_VER) || (defined(__INTEL_COMPILER) && defined(WIN32))
1960c16b537SWarner Losh __pragma( pack(push, 1) )
197052d3c12SConrad Meyer typedef struct { U16 v; } unalign16;
198052d3c12SConrad Meyer typedef struct { U32 v; } unalign32;
199052d3c12SConrad Meyer typedef struct { U64 v; } unalign64;
200052d3c12SConrad Meyer typedef struct { size_t v; } unalignArch;
__pragma(pack (pop))2010c16b537SWarner Losh __pragma( pack(pop) )
2020c16b537SWarner Losh #else
203052d3c12SConrad Meyer typedef struct { U16 v; } __attribute__((packed)) unalign16;
204052d3c12SConrad Meyer typedef struct { U32 v; } __attribute__((packed)) unalign32;
205052d3c12SConrad Meyer typedef struct { U64 v; } __attribute__((packed)) unalign64;
206052d3c12SConrad Meyer typedef struct { size_t v; } __attribute__((packed)) unalignArch;
2070c16b537SWarner Losh #endif
2080c16b537SWarner Losh
209052d3c12SConrad Meyer MEM_STATIC U16 MEM_read16(const void* ptr) { return ((const unalign16*)ptr)->v; }
MEM_read32(const void * ptr)210052d3c12SConrad Meyer MEM_STATIC U32 MEM_read32(const void* ptr) { return ((const unalign32*)ptr)->v; }
MEM_read64(const void * ptr)211052d3c12SConrad Meyer MEM_STATIC U64 MEM_read64(const void* ptr) { return ((const unalign64*)ptr)->v; }
MEM_readST(const void * ptr)212052d3c12SConrad Meyer MEM_STATIC size_t MEM_readST(const void* ptr) { return ((const unalignArch*)ptr)->v; }
2130c16b537SWarner Losh
MEM_write16(void * memPtr,U16 value)214052d3c12SConrad Meyer MEM_STATIC void MEM_write16(void* memPtr, U16 value) { ((unalign16*)memPtr)->v = value; }
MEM_write32(void * memPtr,U32 value)215052d3c12SConrad Meyer MEM_STATIC void MEM_write32(void* memPtr, U32 value) { ((unalign32*)memPtr)->v = value; }
MEM_write64(void * memPtr,U64 value)216052d3c12SConrad Meyer MEM_STATIC void MEM_write64(void* memPtr, U64 value) { ((unalign64*)memPtr)->v = value; }
2170c16b537SWarner Losh
2180c16b537SWarner Losh #else
2190c16b537SWarner Losh
2200c16b537SWarner Losh /* default method, safe and standard.
2210c16b537SWarner Losh can sometimes prove slower */
2220c16b537SWarner Losh
MEM_read16(const void * memPtr)2230c16b537SWarner Losh MEM_STATIC U16 MEM_read16(const void* memPtr)
2240c16b537SWarner Losh {
225f7cd7fe5SConrad Meyer U16 val; ZSTD_memcpy(&val, memPtr, sizeof(val)); return val;
2260c16b537SWarner Losh }
2270c16b537SWarner Losh
MEM_read32(const void * memPtr)2280c16b537SWarner Losh MEM_STATIC U32 MEM_read32(const void* memPtr)
2290c16b537SWarner Losh {
230f7cd7fe5SConrad Meyer U32 val; ZSTD_memcpy(&val, memPtr, sizeof(val)); return val;
2310c16b537SWarner Losh }
2320c16b537SWarner Losh
MEM_read64(const void * memPtr)2330c16b537SWarner Losh MEM_STATIC U64 MEM_read64(const void* memPtr)
2340c16b537SWarner Losh {
235f7cd7fe5SConrad Meyer U64 val; ZSTD_memcpy(&val, memPtr, sizeof(val)); return val;
2360c16b537SWarner Losh }
2370c16b537SWarner Losh
MEM_readST(const void * memPtr)2380c16b537SWarner Losh MEM_STATIC size_t MEM_readST(const void* memPtr)
2390c16b537SWarner Losh {
240f7cd7fe5SConrad Meyer size_t val; ZSTD_memcpy(&val, memPtr, sizeof(val)); return val;
2410c16b537SWarner Losh }
2420c16b537SWarner Losh
MEM_write16(void * memPtr,U16 value)2430c16b537SWarner Losh MEM_STATIC void MEM_write16(void* memPtr, U16 value)
2440c16b537SWarner Losh {
245f7cd7fe5SConrad Meyer ZSTD_memcpy(memPtr, &value, sizeof(value));
2460c16b537SWarner Losh }
2470c16b537SWarner Losh
MEM_write32(void * memPtr,U32 value)2480c16b537SWarner Losh MEM_STATIC void MEM_write32(void* memPtr, U32 value)
2490c16b537SWarner Losh {
250f7cd7fe5SConrad Meyer ZSTD_memcpy(memPtr, &value, sizeof(value));
2510c16b537SWarner Losh }
2520c16b537SWarner Losh
MEM_write64(void * memPtr,U64 value)2530c16b537SWarner Losh MEM_STATIC void MEM_write64(void* memPtr, U64 value)
2540c16b537SWarner Losh {
255f7cd7fe5SConrad Meyer ZSTD_memcpy(memPtr, &value, sizeof(value));
2560c16b537SWarner Losh }
2570c16b537SWarner Losh
2580c16b537SWarner Losh #endif /* MEM_FORCE_MEMORY_ACCESS */
2590c16b537SWarner Losh
MEM_swap32(U32 in)2600c16b537SWarner Losh MEM_STATIC U32 MEM_swap32(U32 in)
2610c16b537SWarner Losh {
2620c16b537SWarner Losh #if defined(_MSC_VER) /* Visual Studio */
2630c16b537SWarner Losh return _byteswap_ulong(in);
2640f743729SConrad Meyer #elif (defined (__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 403)) \
2650f743729SConrad Meyer || (defined(__clang__) && __has_builtin(__builtin_bswap32))
2660c16b537SWarner Losh return __builtin_bswap32(in);
2670c16b537SWarner Losh #else
2680c16b537SWarner Losh return ((in << 24) & 0xff000000 ) |
2690c16b537SWarner Losh ((in << 8) & 0x00ff0000 ) |
2700c16b537SWarner Losh ((in >> 8) & 0x0000ff00 ) |
2710c16b537SWarner Losh ((in >> 24) & 0x000000ff );
2720c16b537SWarner Losh #endif
2730c16b537SWarner Losh }
2740c16b537SWarner Losh
MEM_swap64(U64 in)2750c16b537SWarner Losh MEM_STATIC U64 MEM_swap64(U64 in)
2760c16b537SWarner Losh {
2770c16b537SWarner Losh #if defined(_MSC_VER) /* Visual Studio */
2780c16b537SWarner Losh return _byteswap_uint64(in);
2790f743729SConrad Meyer #elif (defined (__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 403)) \
2800f743729SConrad Meyer || (defined(__clang__) && __has_builtin(__builtin_bswap64))
2810c16b537SWarner Losh return __builtin_bswap64(in);
2820c16b537SWarner Losh #else
2830c16b537SWarner Losh return ((in << 56) & 0xff00000000000000ULL) |
2840c16b537SWarner Losh ((in << 40) & 0x00ff000000000000ULL) |
2850c16b537SWarner Losh ((in << 24) & 0x0000ff0000000000ULL) |
2860c16b537SWarner Losh ((in << 8) & 0x000000ff00000000ULL) |
2870c16b537SWarner Losh ((in >> 8) & 0x00000000ff000000ULL) |
2880c16b537SWarner Losh ((in >> 24) & 0x0000000000ff0000ULL) |
2890c16b537SWarner Losh ((in >> 40) & 0x000000000000ff00ULL) |
2900c16b537SWarner Losh ((in >> 56) & 0x00000000000000ffULL);
2910c16b537SWarner Losh #endif
2920c16b537SWarner Losh }
2930c16b537SWarner Losh
MEM_swapST(size_t in)2940c16b537SWarner Losh MEM_STATIC size_t MEM_swapST(size_t in)
2950c16b537SWarner Losh {
2960c16b537SWarner Losh if (MEM_32bits())
2970c16b537SWarner Losh return (size_t)MEM_swap32((U32)in);
2980c16b537SWarner Losh else
2990c16b537SWarner Losh return (size_t)MEM_swap64((U64)in);
3000c16b537SWarner Losh }
3010c16b537SWarner Losh
3020c16b537SWarner Losh /*=== Little endian r/w ===*/
3030c16b537SWarner Losh
MEM_readLE16(const void * memPtr)3040c16b537SWarner Losh MEM_STATIC U16 MEM_readLE16(const void* memPtr)
3050c16b537SWarner Losh {
3060c16b537SWarner Losh if (MEM_isLittleEndian())
3070c16b537SWarner Losh return MEM_read16(memPtr);
3080c16b537SWarner Losh else {
3090c16b537SWarner Losh const BYTE* p = (const BYTE*)memPtr;
3100c16b537SWarner Losh return (U16)(p[0] + (p[1]<<8));
3110c16b537SWarner Losh }
3120c16b537SWarner Losh }
3130c16b537SWarner Losh
MEM_writeLE16(void * memPtr,U16 val)3140c16b537SWarner Losh MEM_STATIC void MEM_writeLE16(void* memPtr, U16 val)
3150c16b537SWarner Losh {
3160c16b537SWarner Losh if (MEM_isLittleEndian()) {
3170c16b537SWarner Losh MEM_write16(memPtr, val);
3180c16b537SWarner Losh } else {
3190c16b537SWarner Losh BYTE* p = (BYTE*)memPtr;
3200c16b537SWarner Losh p[0] = (BYTE)val;
3210c16b537SWarner Losh p[1] = (BYTE)(val>>8);
3220c16b537SWarner Losh }
3230c16b537SWarner Losh }
3240c16b537SWarner Losh
MEM_readLE24(const void * memPtr)3250c16b537SWarner Losh MEM_STATIC U32 MEM_readLE24(const void* memPtr)
3260c16b537SWarner Losh {
327*5ff13fbcSAllan Jude return (U32)MEM_readLE16(memPtr) + ((U32)(((const BYTE*)memPtr)[2]) << 16);
3280c16b537SWarner Losh }
3290c16b537SWarner Losh
MEM_writeLE24(void * memPtr,U32 val)3300c16b537SWarner Losh MEM_STATIC void MEM_writeLE24(void* memPtr, U32 val)
3310c16b537SWarner Losh {
3320c16b537SWarner Losh MEM_writeLE16(memPtr, (U16)val);
3330c16b537SWarner Losh ((BYTE*)memPtr)[2] = (BYTE)(val>>16);
3340c16b537SWarner Losh }
3350c16b537SWarner Losh
MEM_readLE32(const void * memPtr)3360c16b537SWarner Losh MEM_STATIC U32 MEM_readLE32(const void* memPtr)
3370c16b537SWarner Losh {
3380c16b537SWarner Losh if (MEM_isLittleEndian())
3390c16b537SWarner Losh return MEM_read32(memPtr);
3400c16b537SWarner Losh else
3410c16b537SWarner Losh return MEM_swap32(MEM_read32(memPtr));
3420c16b537SWarner Losh }
3430c16b537SWarner Losh
MEM_writeLE32(void * memPtr,U32 val32)3440c16b537SWarner Losh MEM_STATIC void MEM_writeLE32(void* memPtr, U32 val32)
3450c16b537SWarner Losh {
3460c16b537SWarner Losh if (MEM_isLittleEndian())
3470c16b537SWarner Losh MEM_write32(memPtr, val32);
3480c16b537SWarner Losh else
3490c16b537SWarner Losh MEM_write32(memPtr, MEM_swap32(val32));
3500c16b537SWarner Losh }
3510c16b537SWarner Losh
MEM_readLE64(const void * memPtr)3520c16b537SWarner Losh MEM_STATIC U64 MEM_readLE64(const void* memPtr)
3530c16b537SWarner Losh {
3540c16b537SWarner Losh if (MEM_isLittleEndian())
3550c16b537SWarner Losh return MEM_read64(memPtr);
3560c16b537SWarner Losh else
3570c16b537SWarner Losh return MEM_swap64(MEM_read64(memPtr));
3580c16b537SWarner Losh }
3590c16b537SWarner Losh
MEM_writeLE64(void * memPtr,U64 val64)3600c16b537SWarner Losh MEM_STATIC void MEM_writeLE64(void* memPtr, U64 val64)
3610c16b537SWarner Losh {
3620c16b537SWarner Losh if (MEM_isLittleEndian())
3630c16b537SWarner Losh MEM_write64(memPtr, val64);
3640c16b537SWarner Losh else
3650c16b537SWarner Losh MEM_write64(memPtr, MEM_swap64(val64));
3660c16b537SWarner Losh }
3670c16b537SWarner Losh
MEM_readLEST(const void * memPtr)3680c16b537SWarner Losh MEM_STATIC size_t MEM_readLEST(const void* memPtr)
3690c16b537SWarner Losh {
3700c16b537SWarner Losh if (MEM_32bits())
3710c16b537SWarner Losh return (size_t)MEM_readLE32(memPtr);
3720c16b537SWarner Losh else
3730c16b537SWarner Losh return (size_t)MEM_readLE64(memPtr);
3740c16b537SWarner Losh }
3750c16b537SWarner Losh
MEM_writeLEST(void * memPtr,size_t val)3760c16b537SWarner Losh MEM_STATIC void MEM_writeLEST(void* memPtr, size_t val)
3770c16b537SWarner Losh {
3780c16b537SWarner Losh if (MEM_32bits())
3790c16b537SWarner Losh MEM_writeLE32(memPtr, (U32)val);
3800c16b537SWarner Losh else
3810c16b537SWarner Losh MEM_writeLE64(memPtr, (U64)val);
3820c16b537SWarner Losh }
3830c16b537SWarner Losh
3840c16b537SWarner Losh /*=== Big endian r/w ===*/
3850c16b537SWarner Losh
MEM_readBE32(const void * memPtr)3860c16b537SWarner Losh MEM_STATIC U32 MEM_readBE32(const void* memPtr)
3870c16b537SWarner Losh {
3880c16b537SWarner Losh if (MEM_isLittleEndian())
3890c16b537SWarner Losh return MEM_swap32(MEM_read32(memPtr));
3900c16b537SWarner Losh else
3910c16b537SWarner Losh return MEM_read32(memPtr);
3920c16b537SWarner Losh }
3930c16b537SWarner Losh
MEM_writeBE32(void * memPtr,U32 val32)3940c16b537SWarner Losh MEM_STATIC void MEM_writeBE32(void* memPtr, U32 val32)
3950c16b537SWarner Losh {
3960c16b537SWarner Losh if (MEM_isLittleEndian())
3970c16b537SWarner Losh MEM_write32(memPtr, MEM_swap32(val32));
3980c16b537SWarner Losh else
3990c16b537SWarner Losh MEM_write32(memPtr, val32);
4000c16b537SWarner Losh }
4010c16b537SWarner Losh
MEM_readBE64(const void * memPtr)4020c16b537SWarner Losh MEM_STATIC U64 MEM_readBE64(const void* memPtr)
4030c16b537SWarner Losh {
4040c16b537SWarner Losh if (MEM_isLittleEndian())
4050c16b537SWarner Losh return MEM_swap64(MEM_read64(memPtr));
4060c16b537SWarner Losh else
4070c16b537SWarner Losh return MEM_read64(memPtr);
4080c16b537SWarner Losh }
4090c16b537SWarner Losh
MEM_writeBE64(void * memPtr,U64 val64)4100c16b537SWarner Losh MEM_STATIC void MEM_writeBE64(void* memPtr, U64 val64)
4110c16b537SWarner Losh {
4120c16b537SWarner Losh if (MEM_isLittleEndian())
4130c16b537SWarner Losh MEM_write64(memPtr, MEM_swap64(val64));
4140c16b537SWarner Losh else
4150c16b537SWarner Losh MEM_write64(memPtr, val64);
4160c16b537SWarner Losh }
4170c16b537SWarner Losh
MEM_readBEST(const void * memPtr)4180c16b537SWarner Losh MEM_STATIC size_t MEM_readBEST(const void* memPtr)
4190c16b537SWarner Losh {
4200c16b537SWarner Losh if (MEM_32bits())
4210c16b537SWarner Losh return (size_t)MEM_readBE32(memPtr);
4220c16b537SWarner Losh else
4230c16b537SWarner Losh return (size_t)MEM_readBE64(memPtr);
4240c16b537SWarner Losh }
4250c16b537SWarner Losh
MEM_writeBEST(void * memPtr,size_t val)4260c16b537SWarner Losh MEM_STATIC void MEM_writeBEST(void* memPtr, size_t val)
4270c16b537SWarner Losh {
4280c16b537SWarner Losh if (MEM_32bits())
4290c16b537SWarner Losh MEM_writeBE32(memPtr, (U32)val);
4300c16b537SWarner Losh else
4310c16b537SWarner Losh MEM_writeBE64(memPtr, (U64)val);
4320c16b537SWarner Losh }
4330c16b537SWarner Losh
434f7cd7fe5SConrad Meyer /* code only tested on 32 and 64 bits systems */
MEM_check(void)435f7cd7fe5SConrad Meyer MEM_STATIC void MEM_check(void) { DEBUG_STATIC_ASSERT((sizeof(size_t)==4) || (sizeof(size_t)==8)); }
436f7cd7fe5SConrad Meyer
4370c16b537SWarner Losh
4380c16b537SWarner Losh #if defined (__cplusplus)
4390c16b537SWarner Losh }
4400c16b537SWarner Losh #endif
4410c16b537SWarner Losh
4420c16b537SWarner Losh #endif /* MEM_H_MODULE */
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