mirror of
https://github.com/transmission/transmission
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129 lines
4 KiB
C
129 lines
4 KiB
C
/*
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* This file Copyright (C) 2013-2014 Mnemosyne LLC
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*
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* It may be used under the GNU GPL versions 2 or 3
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* or any future license endorsed by Mnemosyne LLC.
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*
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*/
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#pragma once
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#include <stdarg.h>
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#include "tr-macros.h"
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/**
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* @addtogroup error Error reporting
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* @{
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*/
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/** @brief Structure holding error information. */
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struct tr_error
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{
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/** @brief Error code, platform-specific */
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int code;
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/** @brief Error message */
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char* message;
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};
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/**
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* @brief Create new error object using literal error message.
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*
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* @param[in] code Error code (platform-specific).
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* @param[in] message Error message.
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*
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* @return Newly allocated error object on success, `nullptr` otherwise.
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*/
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tr_error* tr_error_new_literal(int code, char const* message);
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/**
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* @brief Create new error object using `vprintf`-style formatting.
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*
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* @param[in] code Error code (platform-specific).
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* @param[in] message_format Error message format string.
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* @param[in] args Format arguments.
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*
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* @return Newly allocated error object on success, `nullptr` otherwise.
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*/
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tr_error* tr_error_new_valist(int code, char const* message_format, va_list args) TR_GNUC_PRINTF(2, 0);
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/**
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* @brief Free memory used by error object.
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*
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* @param[in] error Error object to be freed.
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*/
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void tr_error_free(tr_error* error);
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/**
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* @brief Create and set new error object using `printf`-style formatting.
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*
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* If passed pointer to error object is `nullptr`, do nothing.
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*
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* @param[in,out] error Pointer to error object to be set.
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* @param[in] code Error code (platform-specific).
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* @param[in] message_format Error message format string.
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* @param[in] ... Format arguments.
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*/
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void tr_error_set(tr_error** error, int code, char const* message_format, ...) TR_GNUC_PRINTF(3, 4);
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/**
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* @brief Create and set new error object using literal error message.
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*
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* If passed pointer to error object is `nullptr`, do nothing.
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*
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* @param[in,out] error Pointer to error object to be set.
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* @param[in] code Error code (platform-specific).
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* @param[in] message Error message.
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*/
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void tr_error_set_literal(tr_error** error, int code, char const* message);
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/**
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* @brief Propagate existing error object upwards.
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*
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* If passed pointer to new error object is not `nullptr`, copy old error object
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* to new error object and free old error object. Otherwise, just free old error
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* object.
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*
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* @param[in,out] new_error Pointer to error object to be set.
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* @param[in,out] old_error Error object to be propagated. Cleared on return.
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*/
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void tr_error_propagate(tr_error** new_error, tr_error** old_error);
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/**
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* @brief Clear error object.
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*
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* Free error object being pointed and set pointer to `nullptr`. If passed
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* pointer is `nullptr`, do nothing.
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*
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* @param[in,out] error Pointer to error object to be cleared.
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*/
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void tr_error_clear(tr_error** error);
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/**
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* @brief Prefix message of exising error object.
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*
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* If passed pointer to error object is not `nullptr`, prefix its message with
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* `printf`-style formatted text. Otherwise, do nothing.
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*
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* @param[in,out] error Pointer to error object to be set.
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* @param[in] prefix_format Prefix format string.
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* @param[in] ... Format arguments.
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*/
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void tr_error_prefix(tr_error** error, char const* prefix_format, ...) TR_GNUC_PRINTF(2, 3);
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/**
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* @brief Prefix message and propagate existing error object upwards.
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*
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* If passed pointer to new error object is not `nullptr`, copy old error object
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* to new error object, prefix its message with `printf`-style formatted text,
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* and free old error object. Otherwise, just free old error object.
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*
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* @param[in,out] new_error Pointer to error object to be set.
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* @param[in,out] old_error Error object to be propagated. Cleared on return.
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* @param[in] prefix_format Prefix format string.
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* @param[in] ... Format arguments.
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*/
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void tr_error_propagate_prefixed(tr_error** new_error, tr_error** old_error, char const* prefix_format, ...)
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TR_GNUC_PRINTF(3, 4);
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/** @} */
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