| /* |
| * Copyright (c) 2016, Alliance for Open Media. All rights reserved |
| * |
| * This source code is subject to the terms of the BSD 2 Clause License and |
| * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License |
| * was not distributed with this source code in the LICENSE file, you can |
| * obtain it at www.aomedia.org/license/software. If the Alliance for Open |
| * Media Patent License 1.0 was not distributed with this source code in the |
| * PATENTS file, you can obtain it at www.aomedia.org/license/patent. |
| */ |
| #ifndef AOM_AOM_INTEGER_H_ |
| #define AOM_AOM_INTEGER_H_ |
| |
| /* get ptrdiff_t, size_t, wchar_t, NULL */ |
| #include <stddef.h> |
| |
| #if defined(_MSC_VER) |
| #define AOM_FORCE_INLINE __forceinline |
| #define AOM_INLINE __inline |
| #else |
| #define AOM_FORCE_INLINE __inline__ __attribute__((always_inline)) |
| // TODO(jbb): Allow a way to force inline off for older compilers. |
| #define AOM_INLINE inline |
| #endif |
| |
| #if defined(AOM_EMULATE_INTTYPES) |
| typedef signed char int8_t; |
| typedef signed short int16_t; |
| typedef signed int int32_t; |
| |
| typedef unsigned char uint8_t; |
| typedef unsigned short uint16_t; |
| typedef unsigned int uint32_t; |
| |
| #ifndef _UINTPTR_T_DEFINED |
| typedef size_t uintptr_t; |
| #endif |
| |
| #else |
| |
| /* Most platforms have the C99 standard integer types. */ |
| |
| #if defined(__cplusplus) |
| #if !defined(__STDC_FORMAT_MACROS) |
| #define __STDC_FORMAT_MACROS |
| #endif |
| #if !defined(__STDC_LIMIT_MACROS) |
| #define __STDC_LIMIT_MACROS |
| #endif |
| #endif // __cplusplus |
| |
| #include <stdint.h> |
| |
| #endif |
| |
| /* VS2010 defines stdint.h, but not inttypes.h */ |
| #if defined(_MSC_VER) && _MSC_VER < 1800 |
| #define PRId64 "I64d" |
| #else |
| #include <inttypes.h> |
| #endif |
| |
| #if !defined(INT8_MAX) |
| #define INT8_MAX 127 |
| #endif |
| |
| #if !defined(INT32_MAX) |
| #define INT32_MAX 2147483647 |
| #endif |
| |
| #if !defined(INT32_MIN) |
| #define INT32_MIN (-2147483647 - 1) |
| #endif |
| |
| #define NELEMENTS(x) (int)(sizeof(x) / sizeof(x[0])) |
| |
| #if defined(__cplusplus) |
| extern "C" { |
| #endif // __cplusplus |
| |
| // Returns size of uint64_t when encoded using LEB128. |
| size_t aom_uleb_size_in_bytes(uint64_t value); |
| |
| // Returns 0 on success, -1 on decode failure. |
| // On success, 'value' stores the decoded LEB128 value and 'length' stores |
| // the number of bytes decoded. |
| int aom_uleb_decode(const uint8_t *buffer, size_t available, uint64_t *value, |
| size_t *length); |
| |
| // Encodes LEB128 integer. Returns 0 when successful, and -1 upon failure. |
| int aom_uleb_encode(uint64_t value, size_t available, uint8_t *coded_value, |
| size_t *coded_size); |
| |
| // Encodes LEB128 integer to size specified. Returns 0 when successful, and -1 |
| // upon failure. |
| // Note: This will write exactly pad_to_size bytes; if the value cannot be |
| // encoded in this many bytes, then this will fail. |
| int aom_uleb_encode_fixed_size(uint64_t value, size_t available, |
| size_t pad_to_size, uint8_t *coded_value, |
| size_t *coded_size); |
| |
| #if defined(__cplusplus) |
| } // extern "C" |
| #endif // __cplusplus |
| |
| #endif // AOM_AOM_INTEGER_H_ |