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/***************************************************************************/
/* */
/* fterrors.h */
/* */
/* FreeType error code handling (specification). */
/* */
/* Copyright 1996-2017 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
/* modified, and distributed under the terms of the FreeType project */
/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
/* this file you indicate that you have read the license and */
/* understand and accept it fully. */
/* */
/***************************************************************************/
/*************************************************************************/
/* */
/* <Section> */
/* error_enumerations */
/* */
/* <Title> */
/* Error Enumerations */
/* */
/* <Abstract> */
/* How to handle errors and error strings. */
/* */
/* <Description> */
/* The header file `fterrors.h' (which is automatically included by */
/* `freetype.h' defines the handling of FreeType's enumeration */
/* constants. It can also be used to generate error message strings */
/* with a small macro trick explained below. */
/* */
/* *Error* *Formats* */
/* */
/* The configuration macro FT_CONFIG_OPTION_USE_MODULE_ERRORS can be */
/* defined in `ftoption.h' in order to make the higher byte indicate */
/* the module where the error has happened (this is not compatible */
/* with standard builds of FreeType 2, however). See the file */
/* `ftmoderr.h' for more details. */
/* */
/* *Error* *Message* *Strings* */
/* */
/* Error definitions are set up with special macros that allow client */
/* applications to build a table of error message strings. The */
/* strings are not included in a normal build of FreeType 2 to */
/* save space (most client applications do not use them). */
/* */
/* To do so, you have to define the following macros before including */
/* this file. */
/* */
/* { */
/* FT_ERROR_START_LIST */
/* } */
/* */
/* This macro is called before anything else to define the start of */
/* the error list. It is followed by several FT_ERROR_DEF calls. */
/* */
/* { */
/* FT_ERROR_DEF( e, v, s ) */
/* } */
/* */
/* This macro is called to define one single error. `e' is the error */
/* code identifier (e.g., `Invalid_Argument'), `v' is the error's */
/* numerical value, and `s' is the corresponding error string. */
/* */
/* { */
/* FT_ERROR_END_LIST */
/* } */
/* */
/* This macro ends the list. */
/* */
/* Additionally, you have to undefine `FTERRORS_H_' before #including */
/* this file. */
/* */
/* Here is a simple example. */
/* */
/* { */
/* #undef FTERRORS_H_ */
/* #define FT_ERRORDEF( e, v, s ) { e, s }, */
/* #define FT_ERROR_START_LIST { */
/* #define FT_ERROR_END_LIST { 0, NULL } }; */
/* */
/* const struct */
/* { */
/* int err_code; */
/* const char* err_msg; */
/* } ft_errors[] = */
/* */
/* #include FT_ERRORS_H */
/* } */
/* */
/* Note that `FT_Err_Ok' is _not_ defined with `FT_ERRORDEF' but with */
/* `FT_NOERRORDEF'; it is always zero. */
/* */
/*************************************************************************/
/* */
/* In previous FreeType versions we used `__FTERRORS_H__'. However, */
/* using two successive underscores in a non-system symbol name */
/* violates the C (and C++) standard, so it was changed to the */
/* current form. In spite of this, we have to make */
/* */
/* #undefine __FTERRORS_H__ */
/* */
/* work for backward compatibility. */
/* */
#if !( defined( FTERRORS_H_ ) && defined ( __FTERRORS_H__ ) )
#define FTERRORS_H_
#define __FTERRORS_H__
/* include module base error codes */
#include FT_MODULE_ERRORS_H
/*******************************************************************/
/*******************************************************************/
/***** *****/
/***** SETUP MACROS *****/
/***** *****/
/*******************************************************************/
/*******************************************************************/
#undef FT_NEED_EXTERN_C
/* FT_ERR_PREFIX is used as a prefix for error identifiers. */
/* By default, we use `FT_Err_'. */
/* */
#ifndef FT_ERR_PREFIX
#define FT_ERR_PREFIX FT_Err_
#endif
/* FT_ERR_BASE is used as the base for module-specific errors. */
/* */
#ifdef FT_CONFIG_OPTION_USE_MODULE_ERRORS
#ifndef FT_ERR_BASE
#define FT_ERR_BASE FT_Mod_Err_Base
#endif
#else
#undef FT_ERR_BASE
#define FT_ERR_BASE 0
#endif /* FT_CONFIG_OPTION_USE_MODULE_ERRORS */
/* If FT_ERRORDEF is not defined, we need to define a simple */
/* enumeration type. */
/* */
#ifndef FT_ERRORDEF
#define FT_ERRORDEF( e, v, s ) e = v,
#define FT_ERROR_START_LIST enum {
#define FT_ERROR_END_LIST FT_ERR_CAT( FT_ERR_PREFIX, Max ) };
#ifdef __cplusplus
#define FT_NEED_EXTERN_C
extern "C" {
#endif
#endif /* !FT_ERRORDEF */
/* this macro is used to define an error */
#define FT_ERRORDEF_( e, v, s ) \
FT_ERRORDEF( FT_ERR_CAT( FT_ERR_PREFIX, e ), v + FT_ERR_BASE, s )
/* this is only used for <module>_Err_Ok, which must be 0! */
#define FT_NOERRORDEF_( e, v, s ) \
FT_ERRORDEF( FT_ERR_CAT( FT_ERR_PREFIX, e ), v, s )
#ifdef FT_ERROR_START_LIST
FT_ERROR_START_LIST
#endif
/* now include the error codes */
#include FT_ERROR_DEFINITIONS_H
#ifdef FT_ERROR_END_LIST
FT_ERROR_END_LIST
#endif
/*******************************************************************/
/*******************************************************************/
/***** *****/
/***** SIMPLE CLEANUP *****/
/***** *****/
/*******************************************************************/
/*******************************************************************/
#ifdef FT_NEED_EXTERN_C
}
#endif
#undef FT_ERROR_START_LIST
#undef FT_ERROR_END_LIST
#undef FT_ERRORDEF
#undef FT_ERRORDEF_
#undef FT_NOERRORDEF_
#undef FT_NEED_EXTERN_C
#undef FT_ERR_BASE
/* FT_ERR_PREFIX is needed internally */
#ifndef FT2_BUILD_LIBRARY
#undef FT_ERR_PREFIX
#endif
#endif /* !(FTERRORS_H_ && __FTERRORS_H__) */
/* END */
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