/* * Copyright (c) Meta Platforms, Inc. and affiliates. * All rights reserved. * * This source code is licensed under both the BSD-style license (found in the * LICENSE file in the root directory of this source tree) and the GPLv2 (found * in the COPYING file in the root directory of this source tree). * You may select, at your option, one of the above-listed licenses. */ /* Note : this module is expected to remain private, do not expose it */ #ifndef ERROR_H_MODULE #define ERROR_H_MODULE #if defined (__cplusplus) extern "C" { #endif /* **************************************** * Dependencies ******************************************/ #include "../zstd_errors.h" /* enum list */ #include "compiler.h" #include "debug.h" #include "zstd_deps.h" /* size_t */ /* **************************************** * Compiler-specific ******************************************/ #if defined(__GNUC__) #define ERR_STATIC … #elif defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) #define ERR_STATIC … #elif defined(_MSC_VER) #define ERR_STATIC … #else #define ERR_STATIC … #endif /*-**************************************** * Customization (error_public.h) ******************************************/ ERR_enum; #define PREFIX(name) … /*-**************************************** * Error codes handling ******************************************/ #undef ERROR /* already defined on Visual Studio */ #define ERROR(name) … #define ZSTD_ERROR(name) … ERR_STATIC unsigned ERR_isError(size_t code) { … } ERR_STATIC ERR_enum ERR_getErrorCode(size_t code) { … } /* check and forward error code */ #define CHECK_V_F(e, f) … #define CHECK_F(f) … /*-**************************************** * Error Strings ******************************************/ const char* ERR_getErrorString(ERR_enum code); /* error_private.c */ ERR_STATIC const char* ERR_getErrorName(size_t code) { … } /** * Ignore: this is an internal helper. * * This is a helper function to help force C99-correctness during compilation. * Under strict compilation modes, variadic macro arguments can't be empty. * However, variadic function arguments can be. Using a function therefore lets * us statically check that at least one (string) argument was passed, * independent of the compilation flags. */ static INLINE_KEYWORD UNUSED_ATTR void _force_has_format_string(const char *format, ...) { … } /** * Ignore: this is an internal helper. * * We want to force this function invocation to be syntactically correct, but * we don't want to force runtime evaluation of its arguments. */ #define _FORCE_HAS_FORMAT_STRING(...) … #define ERR_QUOTE(str) … /** * Return the specified error if the condition evaluates to true. * * In debug modes, prints additional information. * In order to do that (particularly, printing the conditional that failed), * this can't just wrap RETURN_ERROR(). */ #define RETURN_ERROR_IF(cond, err, ...) … /** * Unconditionally return the specified error. * * In debug modes, prints additional information. */ #define RETURN_ERROR(err, ...) … /** * If the provided expression evaluates to an error code, returns that error code. * * In debug modes, prints additional information. */ #define FORWARD_IF_ERROR(err, ...) … #if defined (__cplusplus) } #endif #endif /* ERROR_H_MODULE */
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