307 lines
17 KiB
C++
307 lines
17 KiB
C++
/*************************************************************************/
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/* error_macros.h */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef ERROR_MACROS_H
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#define ERROR_MACROS_H
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/**
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* Error macros. Unlike exceptions and asserts, these macros try to mantain consistency and stability
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* inside the code. It is recommended to always return processable data, so in case of an error, the
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* engine can stay working well.
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* In most cases, bugs and/or invalid data are not fatal and should never allow a perfectly running application
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* to fail or crash.
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*/
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/**
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* Pointer to the error macro priting function. Reassign to any function to have errors printed
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*/
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/** Function used by the error macros */
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// function, file, line, error, explanation
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enum ErrorHandlerType {
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ERR_HANDLER_ERROR,
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ERR_HANDLER_WARNING,
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ERR_HANDLER_SCRIPT
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};
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typedef void (*ErrorHandlerFunc)(void *, const char *, const char *, int p_line, const char *, const char *, ErrorHandlerType p_type);
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void _err_set_last_error(const char *p_err);
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void _err_clear_last_error();
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struct ErrorHandlerList {
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ErrorHandlerFunc errfunc;
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void *userdata;
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ErrorHandlerList *next;
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ErrorHandlerList() {
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errfunc = 0;
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next = 0;
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userdata = 0;
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}
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};
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void add_error_handler(ErrorHandlerList *p_handler);
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void remove_error_handler(ErrorHandlerList *p_handler);
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void _err_print_error(const char *p_function, const char *p_file, int p_line, const char *p_error, ErrorHandlerType p_type = ERR_HANDLER_ERROR);
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#ifndef _STR
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#define _STR(m_x) #m_x
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#define _MKSTR(m_x) _STR(m_x)
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#endif
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#define _FNL __FILE__ ":"
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/** An index has failed if m_index<0 or m_index >=m_size, the function exists */
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extern bool _err_error_exists;
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#ifdef DEBUG_ENABLED
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/** Print a warning string.
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*/
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#define ERR_EXPLAINC(m_reason) \
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{ \
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_err_set_last_error(m_reason); \
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_err_error_exists = true; \
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}
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#define ERR_EXPLAIN(m_string) \
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{ \
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_err_set_last_error(String(m_string).utf8().get_data()); \
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_err_error_exists = true; \
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}
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#else
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#define ERR_EXPLAIN(m_text)
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#define ERR_EXPLAINC(m_text)
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#endif
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#ifdef __GNUC__
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//#define FUNCTION_STR __PRETTY_FUNCTION__ - too annoying
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#define FUNCTION_STR __FUNCTION__
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#else
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#define FUNCTION_STR __FUNCTION__
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#endif
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// (*): See https://stackoverflow.com/questions/257418/do-while-0-what-is-it-good-for
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#define ERR_FAIL_INDEX(m_index, m_size) \
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do { \
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if ((m_index) < 0 || (m_index) >= (m_size)) { \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Index " _STR(m_index) " out of size (" _STR(m_size) ")."); \
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return; \
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} else \
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_err_error_exists = false; \
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} while (0); // (*)
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/** An index has failed if m_index<0 or m_index >=m_size, the function exists.
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* This function returns an error value, if returning Error, please select the most
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* appropriate error condition from error_macros.h
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*/
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#define ERR_FAIL_INDEX_V(m_index, m_size, m_retval) \
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do { \
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if ((m_index) < 0 || (m_index) >= (m_size)) { \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Index " _STR(m_index) " out of size (" _STR(m_size) ")."); \
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return m_retval; \
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} else \
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_err_error_exists = false; \
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} while (0); // (*)
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/** Use this one if there is no sensible fallback, that is, the error is unrecoverable.
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* We'll do UB by returning a null reference and pray that we wont't crash.
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*/
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#define PRAY_BAD_INDEX(m_index, m_size, m_type) \
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do { \
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if ((m_index) < 0 || (m_index) >= (m_size)) { \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "SEVERE: Index " _STR(m_index) " out of size (" _STR(m_size) ")."); \
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m_type *n = (m_type *)0; /* two-step to avoid warning */ \
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return *n; \
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} else \
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_err_error_exists = false; \
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} while (0); // (*)
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/** An error condition happened (m_cond tested true) (WARNING this is the opposite as assert().
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* the function will exit.
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*/
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#define ERR_FAIL_NULL(m_param) \
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{ \
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if (!m_param) { \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Parameter ' " _STR(m_param) " ' is null."); \
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return; \
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} else \
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_err_error_exists = false; \
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}
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#define ERR_FAIL_NULL_V(m_param, m_retval) \
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{ \
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if (!m_param) { \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Parameter ' " _STR(m_param) " ' is null."); \
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return m_retval; \
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} else \
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_err_error_exists = false; \
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}
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/** An error condition happened (m_cond tested true) (WARNING this is the opposite as assert().
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* the function will exit.
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*/
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#define ERR_FAIL_COND(m_cond) \
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{ \
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if (m_cond) { \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition ' " _STR(m_cond) " ' is true."); \
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return; \
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} else \
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_err_error_exists = false; \
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}
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/** An error condition happened (m_cond tested true) (WARNING this is the opposite as assert().
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* the function will exit.
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* This function returns an error value, if returning Error, please select the most
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* appropriate error condition from error_macros.h
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*/
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#define ERR_FAIL_COND_V(m_cond, m_retval) \
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{ \
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if (m_cond) { \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition ' " _STR(m_cond) " ' is true. returned: " _STR(m_retval)); \
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return m_retval; \
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} else \
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_err_error_exists = false; \
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}
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/** Use this one if there is no sensible fallback, that is, the error is unrecoverable.
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* We'll do UB by returning a null reference and pray that we wont't crash.
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*/
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#define PRAY_COND(m_cond, m_type) \
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{ \
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if (m_cond) { \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "SEVERE: Condition ' " _STR(m_cond) " ' is true."); \
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m_type *n = (m_type *)0; /* two-step to avoid warning */ \
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return *n; \
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} else \
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_err_error_exists = false; \
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}
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/** An error condition happened (m_cond tested true) (WARNING this is the opposite as assert().
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* the loop will skip to the next iteration.
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*/
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#define ERR_CONTINUE(m_cond) \
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{ \
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if (m_cond) { \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition ' " _STR(m_cond) " ' is true. Continuing..:"); \
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continue; \
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} else \
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_err_error_exists = false; \
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}
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/** An error condition happened (m_cond tested true) (WARNING this is the opposite as assert().
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* the loop will break
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*/
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#define ERR_BREAK(m_cond) \
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{ \
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if (m_cond) { \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition ' " _STR(m_cond) " ' is true. Breaking..:"); \
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break; \
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} else \
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_err_error_exists = false; \
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}
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/** Print an error string and return
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*/
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#define ERR_FAIL() \
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{ \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Method/Function Failed."); \
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_err_error_exists = false; \
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return; \
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}
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/** Print an error string and return with value
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*/
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#define ERR_FAIL_V(m_value) \
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{ \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Method/Function Failed, returning: " __STR(m_value)); \
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_err_error_exists = false; \
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return m_value; \
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}
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/** Use this one if there is no sensible fallback, that is, the error is unrecoverable.
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* We'll do UB by returning a null reference and pray that we wont't crash.
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*/
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#define PRAY(m_type) \
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{ \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "SEVERE: Method/Function Failed."); \
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m_type *n = (m_type *)0; /* two-step to avoid warning */ \
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return *n; \
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}
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/** Print an error string.
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*/
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#define ERR_PRINT(m_string) \
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{ \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, m_string); \
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_err_error_exists = false; \
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}
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#define ERR_PRINTS(m_string) \
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{ \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, String(m_string).utf8().get_data()); \
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_err_error_exists = false; \
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}
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/** Print a warning string.
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*/
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#define WARN_PRINT(m_string) \
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{ \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, m_string, ERR_HANDLER_WARNING); \
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_err_error_exists = false; \
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}
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#define WARN_PRINTS(m_string) \
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{ \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, String(m_string).utf8().get_data(), ERR_HANDLER_WARNING); \
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_err_error_exists = false; \
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}
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#endif
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