mirror of
https://github.com/transmission/transmission
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83 lines
2.3 KiB
C++
83 lines
2.3 KiB
C++
// This file Copyright © 2013-2022 Mnemosyne LLC.
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// It may be used under GPLv2 (SPDX: GPL-2.0-only), GPLv3 (SPDX: GPL-3.0-only),
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// or any future license endorsed by Mnemosyne LLC.
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// License text can be found in the licenses/ folder.
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#pragma once
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#include <string_view>
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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 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 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(tr_error** error, int code, std::string_view message);
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/**
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* @brief shorthand for `tr_error_set(error, errno, tr_strerror(errno))`
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*/
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void tr_error_set_from_errno(tr_error** error, int errnum);
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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 existing 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);
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/** @} */
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