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/*************************************************************************/
/* error_macros.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifndef ERROR_MACROS_H
#define ERROR_MACROS_H
/**
* Error macros. Unlike exceptions and asserts, these macros try to mantain consistency and stability
* inside the code. It is recommended to always return processable data, so in case of an error, the
* engine can stay working well.
* In most cases, bugs and/or invalid data are not fatal and should never allow a perfectly running application
* to fail or crash.
*/
/**
* Pointer to the error macro priting function. Reassign to any function to have errors printed
*/
/** Function used by the error macros */
// function, file, line, error, explanation
enum ErrorHandlerType {
ERR_HANDLER_ERROR,
ERR_HANDLER_WARNING,
ERR_HANDLER_SCRIPT,
ERR_HANDLER_SHADER,
};
typedef void (*ErrorHandlerFunc)(void *, const char *, const char *, int p_line, const char *, const char *, ErrorHandlerType p_type);
void _err_set_last_error(const char *p_err);
void _err_clear_last_error();
struct ErrorHandlerList {
ErrorHandlerFunc errfunc;
void *userdata;
ErrorHandlerList *next;
ErrorHandlerList() {
errfunc = 0;
next = 0;
userdata = 0;
}
};
void add_error_handler(ErrorHandlerList *p_handler);
void remove_error_handler(ErrorHandlerList *p_handler);
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);
#ifndef _STR
#define _STR(m_x) #m_x
#define _MKSTR(m_x) _STR(m_x)
#endif
#define _FNL __FILE__ ":"
/** An index has failed if m_index<0 or m_index >=m_size, the function exists */
extern bool _err_error_exists;
#ifdef DEBUG_ENABLED
/** Print a warning string.
*/
#define ERR_EXPLAINC(m_reason) \
{ \
_err_set_last_error(m_reason); \
_err_error_exists = true; \
}
#define ERR_EXPLAIN(m_string) \
{ \
_err_set_last_error(String(m_string).utf8().get_data()); \
_err_error_exists = true; \
}
#else
#define ERR_EXPLAIN(m_text)
#define ERR_EXPLAINC(m_text)
#endif
#ifdef __GNUC__
//#define FUNCTION_STR __PRETTY_FUNCTION__ - too annoying
#define FUNCTION_STR __FUNCTION__
#else
#define FUNCTION_STR __FUNCTION__
#endif
// Don't use this directly; instead, use any of the CRASH_* macros
#ifdef _MSC_VER
#define GENERATE_TRAP \
__debugbreak(); \
/* Avoid warning about control paths */ \
for (;;) { \
}
#else
#define GENERATE_TRAP __builtin_trap();
#endif
// (*): See https://stackoverflow.com/questions/257418/do-while-0-what-is-it-good-for
#define ERR_FAIL_INDEX(m_index, m_size) \
do { \
if ((m_index) < 0 || (m_index) >= (m_size)) { \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Index " _STR(m_index) " out of size (" _STR(m_size) ")."); \
return; \
} else \
_err_error_exists = false; \
} while (0); // (*)
/** An index has failed if m_index<0 or m_index >=m_size, the function exists.
* This function returns an error value, if returning Error, please select the most
* appropriate error condition from error_macros.h
*/
#define ERR_FAIL_INDEX_V(m_index, m_size, m_retval) \
do { \
if ((m_index) < 0 || (m_index) >= (m_size)) { \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Index " _STR(m_index) " out of size (" _STR(m_size) ")."); \
return m_retval; \
} else \
_err_error_exists = false; \
} while (0); // (*)
/** Use this one if there is no sensible fallback, that is, the error is unrecoverable.
* We'll return a null reference and try to keep running.
*/
#define CRASH_BAD_INDEX(m_index, m_size) \
do { \
if ((m_index) < 0 || (m_index) >= (m_size)) { \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "FATAL: Index " _STR(m_index) " out of size (" _STR(m_size) ")."); \
GENERATE_TRAP \
} \
} while (0); // (*)
/** An error condition happened (m_cond tested true) (WARNING this is the opposite as assert().
* the function will exit.
*/
#define ERR_FAIL_NULL(m_param) \
{ \
if (!m_param) { \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Parameter ' " _STR(m_param) " ' is null."); \
return; \
} else \
_err_error_exists = false; \
}
#define ERR_FAIL_NULL_V(m_param, m_retval) \
{ \
if (!m_param) { \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Parameter ' " _STR(m_param) " ' is null."); \
return m_retval; \
} else \
_err_error_exists = false; \
}
/** An error condition happened (m_cond tested true) (WARNING this is the opposite as assert().
* the function will exit.
*/
#define ERR_FAIL_COND(m_cond) \
{ \
if (m_cond) { \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition ' " _STR(m_cond) " ' is true."); \
return; \
} else \
_err_error_exists = false; \
}
/** Use this one if there is no sensible fallback, that is, the error is unrecoverable.
*/
#define CRASH_COND(m_cond) \
{ \
if (m_cond) { \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "FATAL: Condition ' " _STR(m_cond) " ' is true."); \
GENERATE_TRAP \
} \
}
/** An error condition happened (m_cond tested true) (WARNING this is the opposite as assert().
* the function will exit.
* This function returns an error value, if returning Error, please select the most
* appropriate error condition from error_macros.h
*/
#define ERR_FAIL_COND_V(m_cond, m_retval) \
{ \
if (m_cond) { \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition ' " _STR(m_cond) " ' is true. returned: " _STR(m_retval)); \
return m_retval; \
} else \
_err_error_exists = false; \
}
/** An error condition happened (m_cond tested true) (WARNING this is the opposite as assert().
* the loop will skip to the next iteration.
*/
#define ERR_CONTINUE(m_cond) \
{ \
if (m_cond) { \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition ' " _STR(m_cond) " ' is true. Continuing..:"); \
continue; \
} else \
_err_error_exists = false; \
}
/** An error condition happened (m_cond tested true) (WARNING this is the opposite as assert().
* the loop will break
*/
#define ERR_BREAK(m_cond) \
{ \
if (m_cond) { \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition ' " _STR(m_cond) " ' is true. Breaking..:"); \
break; \
} else \
_err_error_exists = false; \
}
/** Print an error string and return
*/
#define ERR_FAIL() \
{ \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Method/Function Failed."); \
_err_error_exists = false; \
return; \
}
/** Print an error string and return with value
*/
#define ERR_FAIL_V(m_value) \
{ \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Method/Function Failed, returning: " __STR(m_value)); \
_err_error_exists = false; \
return m_value; \
}
/** Use this one if there is no sensible fallback, that is, the error is unrecoverable.
*/
#define CRASH_NOW() \
{ \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "FATAL: Method/Function Failed."); \
GENERATE_TRAP \
}
/** Print an error string.
*/
#define ERR_PRINT(m_string) \
{ \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, m_string); \
_err_error_exists = false; \
}
#define ERR_PRINTS(m_string) \
{ \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, String(m_string).utf8().get_data()); \
_err_error_exists = false; \
}
/** Print a warning string.
*/
#define WARN_PRINT(m_string) \
{ \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, m_string, ERR_HANDLER_WARNING); \
_err_error_exists = false; \
}
#define WARN_PRINTS(m_string) \
{ \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, String(m_string).utf8().get_data(), ERR_HANDLER_WARNING); \
_err_error_exists = false; \
}
#endif
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