91 lines
2.7 KiB
C
91 lines
2.7 KiB
C
/* Copyright 2013 Google Inc. All Rights Reserved.
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Distributed under MIT license.
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See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
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*/
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/**
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* @file
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* Common types used in decoder and encoder API.
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*/
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#ifndef BROTLI_COMMON_TYPES_H_
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#define BROTLI_COMMON_TYPES_H_
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#include <stddef.h> /* for size_t */
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#if defined(_MSC_VER) && (_MSC_VER < 1600)
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typedef __int8 int8_t;
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typedef unsigned __int8 uint8_t;
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typedef __int16 int16_t;
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typedef unsigned __int16 uint16_t;
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typedef __int32 int32_t;
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typedef unsigned __int32 uint32_t;
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typedef unsigned __int64 uint64_t;
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typedef __int64 int64_t;
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#else
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#include <stdint.h>
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#endif /* defined(_MSC_VER) && (_MSC_VER < 1600) */
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/**
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* A portable @c bool replacement.
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*
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* ::BROTLI_BOOL is a "documentation" type: actually it is @c int, but in API it
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* denotes a type, whose only values are ::BROTLI_TRUE and ::BROTLI_FALSE.
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*
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* ::BROTLI_BOOL values passed to Brotli should either be ::BROTLI_TRUE or
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* ::BROTLI_FALSE, or be a result of ::TO_BROTLI_BOOL macros.
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*
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* ::BROTLI_BOOL values returned by Brotli should not be tested for equality
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* with @c true, @c false, ::BROTLI_TRUE, ::BROTLI_FALSE, but rather should be
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* evaluated, for example: @code{.cpp}
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* if (SomeBrotliFunction(encoder, BROTLI_TRUE) &&
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* !OtherBrotliFunction(decoder, BROTLI_FALSE)) {
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* bool x = !!YetAnotherBrotliFunction(encoder, TO_BROLTI_BOOL(2 * 2 == 4));
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* DoSomething(x);
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* }
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* @endcode
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*/
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#define BROTLI_BOOL int
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/** Portable @c true replacement. */
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#define BROTLI_TRUE 1
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/** Portable @c false replacement. */
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#define BROTLI_FALSE 0
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/** @c bool to ::BROTLI_BOOL conversion macros. */
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#define TO_BROTLI_BOOL(X) (!!(X) ? BROTLI_TRUE : BROTLI_FALSE)
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#define BROTLI_MAKE_UINT64_T(high, low) ((((uint64_t)(high)) << 32) | low)
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#define BROTLI_UINT32_MAX (~((uint32_t)0))
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#define BROTLI_SIZE_MAX (~((size_t)0))
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/**
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* Allocating function pointer type.
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*
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* @param opaque custom memory manager handle provided by client
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* @param size requested memory region size; can not be @c 0
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* @returns @c 0 in the case of failure
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* @returns a valid pointer to a memory region of at least @p size bytes
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* long otherwise
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*/
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typedef void* (*brotli_alloc_func)(void* opaque, size_t size);
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/**
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* Deallocating function pointer type.
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*
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* This function @b SHOULD do nothing if @p address is @c 0.
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*
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* @param opaque custom memory manager handle provided by client
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* @param address memory region pointer returned by ::brotli_alloc_func, or @c 0
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*/
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typedef void (*brotli_free_func)(void* opaque, void* address);
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#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \
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!defined(__cplusplus) && !defined(__PGI)
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#define BROTLI_ARRAY_PARAM(L) L
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#else
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#define BROTLI_ARRAY_PARAM(L)
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#endif
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#endif /* BROTLI_COMMON_TYPES_H_ */
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