37d55ff153
Documentation can be visible in many IDEs by hovering the macro anywhere it's used. Error message styling was also tweaked for consistency.
528 lines
33 KiB
C++
528 lines
33 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) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 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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#include "core/typedefs.h"
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/**
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* Error macros. Unlike exceptions and asserts, these macros try to maintain consistency and stability
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* inside the code. It is recommended to always return processable data, so in case of an error,
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* the engine can keep 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 printing 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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ERR_HANDLER_SHADER,
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};
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class String;
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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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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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void _err_print_error(const char *p_function, const char *p_file, int p_line, const String &p_error, ErrorHandlerType p_type = ERR_HANDLER_ERROR);
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void _err_print_error(const char *p_function, const char *p_file, int p_line, const char *p_error, const char *p_message, ErrorHandlerType p_type = ERR_HANDLER_ERROR);
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void _err_print_error(const char *p_function, const char *p_file, int p_line, const String &p_error, const char *p_message, ErrorHandlerType p_type = ERR_HANDLER_ERROR);
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void _err_print_error(const char *p_function, const char *p_file, int p_line, const char *p_error, const String &p_message, ErrorHandlerType p_type = ERR_HANDLER_ERROR);
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void _err_print_error(const char *p_function, const char *p_file, int p_line, const String &p_error, const String &p_message, ErrorHandlerType p_type = ERR_HANDLER_ERROR);
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void _err_print_index_error(const char *p_function, const char *p_file, int p_line, int64_t p_index, int64_t p_size, const char *p_index_str, const char *p_size_str, const char *p_message = "", bool fatal = false);
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void _err_print_index_error(const char *p_function, const char *p_file, int p_line, int64_t p_index, int64_t p_size, const char *p_index_str, const char *p_size_str, const String &p_message, bool fatal = false);
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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 exits */
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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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// Don't use this directly; instead, use any of the CRASH_* macros
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#ifdef _MSC_VER
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#define GENERATE_TRAP \
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__debugbreak(); \
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/* Avoid warning about control paths */ \
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for (;;) { \
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}
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#else
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#define GENERATE_TRAP __builtin_trap();
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#endif
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// Used to strip debug messages in release mode
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#ifdef DEBUG_ENABLED
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#define DEBUG_STR(m_msg) m_msg
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#else
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#define DEBUG_STR(m_msg) ""
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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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/**
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* If `m_index` is less than 0 or greater than or equal to `m_size`, prints a generic
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* error message and returns from the function. This macro should be preferred to
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* `ERR_FAIL_COND` for bounds checking.
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*/
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#define ERR_FAIL_INDEX(m_index, m_size) \
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do { \
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if (unlikely((m_index) < 0 || (m_index) >= (m_size))) { \
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_err_print_index_error(FUNCTION_STR, __FILE__, __LINE__, m_index, m_size, _STR(m_index), _STR(m_size)); \
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return; \
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} \
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} while (0); // (*)
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/**
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* If `m_index` is less than 0 or greater than or equal to `m_size`, prints a custom
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* error message and returns from the function. This macro should be preferred to
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* `ERR_FAIL_COND_MSG` for bounds checking.
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*/
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#define ERR_FAIL_INDEX_MSG(m_index, m_size, m_msg) \
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do { \
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if (unlikely((m_index) < 0 || (m_index) >= (m_size))) { \
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_err_print_index_error(FUNCTION_STR, __FILE__, __LINE__, m_index, m_size, _STR(m_index), _STR(m_size), DEBUG_STR(m_msg)); \
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return; \
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} \
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} while (0); // (*)
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/**
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* If `m_index` is less than 0 or greater than or equal to `m_size`,
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* prints a generic error message and returns the value specified in `m_retval`.
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* This macro should be preferred to `ERR_FAIL_COND_V` for bounds checking.
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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 (unlikely((m_index) < 0 || (m_index) >= (m_size))) { \
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_err_print_index_error(FUNCTION_STR, __FILE__, __LINE__, m_index, m_size, _STR(m_index), _STR(m_size)); \
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return m_retval; \
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} \
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} while (0); // (*)
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/**
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* If `m_index` is less than 0 or greater than or equal to `m_size`,
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* prints a custom error message and returns the value specified in `m_retval`.
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* This macro should be preferred to `ERR_FAIL_COND_V_MSG` for bounds checking.
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*/
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#define ERR_FAIL_INDEX_V_MSG(m_index, m_size, m_retval, m_msg) \
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do { \
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if (unlikely((m_index) < 0 || (m_index) >= (m_size))) { \
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_err_print_index_error(FUNCTION_STR, __FILE__, __LINE__, m_index, m_size, _STR(m_index), _STR(m_size), DEBUG_STR(m_msg)); \
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return m_retval; \
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} \
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} while (0); // (*)
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/**
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* If `m_index` is greater than or equal to `m_size`,
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* prints a generic error message and returns the value specified in `m_retval`.
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* This macro should be preferred to `ERR_FAIL_COND_V` for unsigned bounds checking.
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*/
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#define ERR_FAIL_UNSIGNED_INDEX_V(m_index, m_size, m_retval) \
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do { \
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if (unlikely((m_index) >= (m_size))) { \
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_err_print_index_error(FUNCTION_STR, __FILE__, __LINE__, m_index, m_size, _STR(m_index), _STR(m_size)); \
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return m_retval; \
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} \
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} while (0); // (*)
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/**
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* If `m_index` is greater than or equal to `m_size`,
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* prints a custom error message and returns the value specified in `m_retval`.
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* This macro should be preferred to `ERR_FAIL_COND_V_MSG` for unsigned bounds checking.
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*/
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#define ERR_FAIL_UNSIGNED_INDEX_V_MSG(m_index, m_size, m_retval, m_msg) \
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do { \
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if (unlikely((m_index) >= (m_size))) { \
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_err_print_index_error(FUNCTION_STR, __FILE__, __LINE__, m_index, m_size, _STR(m_index), _STR(m_size), DEBUG_STR(m_msg)); \
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return m_retval; \
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} \
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} while (0); // (*)
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/**
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* If `m_index` is less than 0 or greater than or equal to `m_size`,
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* crashes the engine immediately with a generic error message.
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* Only use this if there's no sensible fallback (i.e. the error is unrecoverable).
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* This macro should be preferred to `CRASH_COND` for bounds checking.
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*/
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#define CRASH_BAD_INDEX(m_index, m_size) \
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do { \
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if (unlikely((m_index) < 0 || (m_index) >= (m_size))) { \
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_err_print_index_error(FUNCTION_STR, __FILE__, __LINE__, m_index, m_size, _STR(m_index), _STR(m_size), "", true); \
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GENERATE_TRAP \
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} \
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} while (0); // (*)
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/**
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* If `m_index` is less than 0 or greater than or equal to `m_size`,
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* crashes the engine immediately with a custom error message.
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* Only use this if there's no sensible fallback (i.e. the error is unrecoverable).
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* This macro should be preferred to `CRASH_COND` for bounds checking.
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*/
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#define CRASH_BAD_INDEX_MSG(m_index, m_size, m_msg) \
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do { \
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if (unlikely((m_index) < 0 || (m_index) >= (m_size))) { \
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_err_print_index_error(FUNCTION_STR, __FILE__, __LINE__, m_index, m_size, _STR(m_index), _STR(m_size), m_msg, true); \
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GENERATE_TRAP \
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} \
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} while (0); // (*)
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/**
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* If `m_param` is `null`, prints a generic error message and returns from the function.
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*/
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#define ERR_FAIL_NULL(m_param) \
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{ \
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if (unlikely(!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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} \
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}
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/**
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* If `m_param` is `null`, prints a custom error message and returns from the function.
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*/
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#define ERR_FAIL_NULL_MSG(m_param, m_msg) \
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{ \
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if (unlikely(!m_param)) { \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Parameter \"" _STR(m_param) "\" is null.", DEBUG_STR(m_msg)); \
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return; \
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} \
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}
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/**
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* If `m_param` is `null`, prints a generic error message and returns the value specified in `m_retval`.
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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 (unlikely(!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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} \
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}
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/**
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* If `m_param` is `null`, prints a custom error message and returns the value specified in `m_retval`.
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*/
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#define ERR_FAIL_NULL_V_MSG(m_param, m_retval, m_msg) \
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{ \
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if (unlikely(!m_param)) { \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Parameter \"" _STR(m_param) "\" is null.", DEBUG_STR(m_msg)); \
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return m_retval; \
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} \
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}
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/**
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* If `m_cond` evaluates to `true`, prints a generic error message and returns from the function.
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*/
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#define ERR_FAIL_COND(m_cond) \
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{ \
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if (unlikely(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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} \
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}
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/**
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* If `m_cond` evaluates to `true`, prints a custom error message and returns from the function.
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*/
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#define ERR_FAIL_COND_MSG(m_cond, m_msg) \
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{ \
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if (unlikely(m_cond)) { \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition \"" _STR(m_cond) "\" is true.", DEBUG_STR(m_msg)); \
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return; \
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} \
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}
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/**
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* If `m_cond` evaluates to `true`, crashes the engine immediately with a generic error message.
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* Only use this if there's no sensible fallback (i.e. the error is unrecoverable).
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*/
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#define CRASH_COND(m_cond) \
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{ \
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if (unlikely(m_cond)) { \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "FATAL: Condition \"" _STR(m_cond) "\" is true."); \
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GENERATE_TRAP \
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} \
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}
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/**
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* If `m_cond` evaluates to `true`, crashes the engine immediately with a custom error message.
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* Only use this if there's no sensible fallback (i.e. the error is unrecoverable).
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*/
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#define CRASH_COND_MSG(m_cond, m_msg) \
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{ \
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if (unlikely(m_cond)) { \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "FATAL: Condition \"" _STR(m_cond) "\" is true.", DEBUG_STR(m_msg)); \
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GENERATE_TRAP \
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} \
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}
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/**
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* If `m_cond` evaluates to `true`, prints a generic error message and returns the value specified in `m_retval`.
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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 (unlikely(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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} \
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}
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/**
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* If `m_cond` evaluates to `true`, prints a custom error message and returns the value specified in `m_retval`.
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*/
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#define ERR_FAIL_COND_V_MSG(m_cond, m_retval, m_msg) \
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{ \
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if (unlikely(m_cond)) { \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition \"" _STR(m_cond) "\" is true. Returned: " _STR(m_retval), DEBUG_STR(m_msg)); \
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return m_retval; \
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} \
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}
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/**
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* If `m_cond` evaluates to `true`, prints a custom error message and continues the loop the macro is located in.
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*/
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#define ERR_CONTINUE(m_cond) \
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{ \
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if (unlikely(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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} \
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}
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/**
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* If `m_cond` evaluates to `true`, prints a custom error message and continues the loop the macro is located in.
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*/
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#define ERR_CONTINUE_MSG(m_cond, m_msg) \
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{ \
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if (unlikely(m_cond)) { \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition \"" _STR(m_cond) "\" is true. Continuing.", DEBUG_STR(m_msg)); \
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continue; \
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} \
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}
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/**
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* If `m_cond` evaluates to `true`, prints a generic error message and breaks from the loop the macro is located in.
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*/
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#define ERR_BREAK(m_cond) \
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{ \
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if (unlikely(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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} \
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}
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/**
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* If `m_cond` evaluates to `true`, prints a custom error message and breaks from the loop the macro is located in.
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*/
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#define ERR_BREAK_MSG(m_cond, m_msg) \
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{ \
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if (unlikely(m_cond)) { \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition \"" _STR(m_cond) "\" is true. Breaking.", DEBUG_STR(m_msg)); \
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break; \
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} \
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}
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/**
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* Prints a generic error message and returns from the function.
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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 failed."); \
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return; \
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}
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/**
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* Prints a custom error message and returns from the function.
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*/
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#define ERR_FAIL_MSG(m_msg) \
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{ \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Method failed.", DEBUG_STR(m_msg)); \
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return; \
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}
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/**
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* Prints a generic error message and returns the value specified in `m_retval`.
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*/
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#define ERR_FAIL_V(m_retval) \
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{ \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Method failed. Returning: " __STR(m_retval)); \
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return m_retval; \
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}
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/**
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* Prints a custom error message and returns the value specified in `m_retval`.
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*/
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#define ERR_FAIL_V_MSG(m_retval, m_msg) \
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{ \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Method failed. Returning: " __STR(m_retval), DEBUG_STR(m_msg)); \
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return m_retval; \
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}
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/**
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* Crashes the engine immediately with a generic error message.
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* Only use this if there's no sensible fallback (i.e. the error is unrecoverable).
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*/
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#define CRASH_NOW() \
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{ \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "FATAL: Method failed."); \
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GENERATE_TRAP \
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}
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/**
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* Crashes the engine immediately with a custom error message.
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* Only use this if there's no sensible fallback (i.e. the error is unrecoverable).
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*/
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#define CRASH_NOW_MSG(m_msg) \
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{ \
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_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "FATAL: Method failed.", DEBUG_STR(m_msg)); \
|
|
GENERATE_TRAP \
|
|
}
|
|
|
|
/**
|
|
* Prints an error message without returning.
|
|
*/
|
|
#define ERR_PRINT(m_string) \
|
|
{ \
|
|
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, m_string); \
|
|
}
|
|
|
|
/**
|
|
* Prints an error message without returning.
|
|
* FIXME: Remove this macro and replace all uses with `ERR_PRINT` as it's identical.
|
|
*/
|
|
#define ERR_PRINTS(m_string) \
|
|
{ \
|
|
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, m_string); \
|
|
}
|
|
|
|
/**
|
|
* Prints an error message without returning, but only do so once in the application lifecycle.
|
|
* This can be used to avoid spamming the console with error messages.
|
|
*/
|
|
#define ERR_PRINT_ONCE(m_string) \
|
|
{ \
|
|
static bool first_print = true; \
|
|
if (first_print) { \
|
|
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, m_string); \
|
|
first_print = false; \
|
|
} \
|
|
}
|
|
|
|
/**
|
|
* Prints a warning message without returning. To warn about deprecated usage,
|
|
* use `WARN_DEPRECATED` or `WARN_DEPRECATED_MSG` instead.
|
|
*/
|
|
#define WARN_PRINT(m_string) \
|
|
{ \
|
|
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, m_string, ERR_HANDLER_WARNING); \
|
|
}
|
|
|
|
/**
|
|
* Prints a warning message without returning.
|
|
* FIXME: Remove this macro and replace all uses with `WARN_PRINT` as it's identical.
|
|
*/
|
|
#define WARN_PRINTS(m_string) \
|
|
{ \
|
|
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, m_string, ERR_HANDLER_WARNING); \
|
|
}
|
|
|
|
/**
|
|
* Prints a warning message without returning, but only do so once in the application lifecycle.
|
|
* This can be used to avoid spamming the console with warning messages.
|
|
*/
|
|
#define WARN_PRINT_ONCE(m_string) \
|
|
{ \
|
|
static bool first_print = true; \
|
|
if (first_print) { \
|
|
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, m_string, ERR_HANDLER_WARNING); \
|
|
first_print = false; \
|
|
} \
|
|
}
|
|
|
|
/**
|
|
* Prints a generic deprecation warning message without returning.
|
|
* This should be preferred to `WARN_PRINT` for deprecation warnings.
|
|
*/
|
|
#define WARN_DEPRECATED \
|
|
{ \
|
|
static volatile bool warning_shown = false; \
|
|
if (!warning_shown) { \
|
|
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "This method has been deprecated and will be removed in the future.", ERR_HANDLER_WARNING); \
|
|
warning_shown = true; \
|
|
} \
|
|
}
|
|
|
|
/**
|
|
* Prints a custom deprecation warning message without returning.
|
|
* This should be preferred to `WARN_PRINT` for deprecation warnings.
|
|
*/
|
|
#define WARN_DEPRECATED_MSG(m_msg) \
|
|
{ \
|
|
static volatile bool warning_shown = false; \
|
|
if (!warning_shown) { \
|
|
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "This method has been deprecated and will be removed in the future.", m_msg, ERR_HANDLER_WARNING); \
|
|
warning_shown = true; \
|
|
} \
|
|
}
|
|
|
|
#endif
|