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207 lines
9.2 KiB
C
207 lines
9.2 KiB
C
/***************************************************************************/
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/* */
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/* fterrors.h */
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/* */
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/* FreeType error code handling (specification). */
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/* */
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/* Copyright 1996-2001, 2002, 2004, 2007 by */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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/* modified, and distributed under the terms of the FreeType project */
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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/*************************************************************************/
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/* */
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/* This special header file is used to define the handling of FT2 */
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/* enumeration constants. It can also be used to generate error message */
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/* strings with a small macro trick explained below. */
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/* */
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/* I - Error Formats */
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/* ----------------- */
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/* */
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/* The configuration macro FT_CONFIG_OPTION_USE_MODULE_ERRORS can be */
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/* defined in ftoption.h in order to make the higher byte indicate */
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/* the module where the error has happened (this is not compatible */
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/* with standard builds of FreeType 2). You can then use the macro */
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/* FT_ERROR_BASE macro to extract the generic error code from an */
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/* FT_Error value. */
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/* */
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/* */
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/* II - Error Message strings */
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/* -------------------------- */
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/* */
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/* The error definitions below are made through special macros that */
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/* allow client applications to build a table of error message strings */
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/* if they need it. The strings are not included in a normal build of */
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/* FreeType 2 to save space (most client applications do not use */
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/* them). */
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/* */
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/* To do so, you have to define the following macros before including */
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/* this file: */
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/* */
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/* FT_ERROR_START_LIST :: */
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/* This macro is called before anything else to define the start of */
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/* the error list. It is followed by several FT_ERROR_DEF calls */
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/* (see below). */
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/* */
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/* FT_ERROR_DEF( e, v, s ) :: */
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/* This macro is called to define one single error. */
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/* `e' is the error code identifier (e.g. FT_Err_Invalid_Argument). */
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/* `v' is the error numerical value. */
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/* `s' is the corresponding error string. */
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/* */
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/* FT_ERROR_END_LIST :: */
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/* This macro ends the list. */
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/* */
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/* Additionally, you have to undefine __FTERRORS_H__ before #including */
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/* this file. */
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/* */
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/* Here is a simple example: */
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/* */
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/* { */
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/* #undef __FTERRORS_H__ */
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/* #define FT_ERRORDEF( e, v, s ) { e, s }, */
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/* #define FT_ERROR_START_LIST { */
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/* #define FT_ERROR_END_LIST { 0, 0 } }; */
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/* */
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/* const struct */
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/* { */
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/* int err_code; */
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/* const char* err_msg; */
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/* } ft_errors[] = */
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/* */
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/* #include FT_ERRORS_H */
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/* } */
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/* */
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/*************************************************************************/
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#ifndef __FTERRORS_H__
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#define __FTERRORS_H__
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/* include module base error codes */
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#include FT_MODULE_ERRORS_H
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/*******************************************************************/
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/*******************************************************************/
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/***** *****/
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/***** SETUP MACROS *****/
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/***** *****/
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/*******************************************************************/
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/*******************************************************************/
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#undef FT_NEED_EXTERN_C
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#undef FT_ERR_XCAT
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#undef FT_ERR_CAT
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#define FT_ERR_XCAT( x, y ) x ## y
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#define FT_ERR_CAT( x, y ) FT_ERR_XCAT( x, y )
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/* FT_ERR_PREFIX is used as a prefix for error identifiers. */
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/* By default, we use `FT_Err_'. */
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/* */
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#ifndef FT_ERR_PREFIX
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#define FT_ERR_PREFIX FT_Err_
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#endif
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/* FT_ERR_BASE is used as the base for module-specific errors. */
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/* */
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#ifdef FT_CONFIG_OPTION_USE_MODULE_ERRORS
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#ifndef FT_ERR_BASE
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#define FT_ERR_BASE FT_Mod_Err_Base
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#endif
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#else
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#undef FT_ERR_BASE
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#define FT_ERR_BASE 0
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#endif /* FT_CONFIG_OPTION_USE_MODULE_ERRORS */
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/* If FT_ERRORDEF is not defined, we need to define a simple */
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/* enumeration type. */
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/* */
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#ifndef FT_ERRORDEF
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#define FT_ERRORDEF( e, v, s ) e = v,
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#define FT_ERROR_START_LIST enum {
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#define FT_ERROR_END_LIST FT_ERR_CAT( FT_ERR_PREFIX, Max ) };
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#ifdef __cplusplus
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#define FT_NEED_EXTERN_C
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extern "C" {
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#endif
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#endif /* !FT_ERRORDEF */
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/* this macro is used to define an error */
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#define FT_ERRORDEF_( e, v, s ) \
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FT_ERRORDEF( FT_ERR_CAT( FT_ERR_PREFIX, e ), v + FT_ERR_BASE, s )
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/* this is only used for <module>_Err_Ok, which must be 0! */
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#define FT_NOERRORDEF_( e, v, s ) \
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FT_ERRORDEF( FT_ERR_CAT( FT_ERR_PREFIX, e ), v, s )
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#ifdef FT_ERROR_START_LIST
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FT_ERROR_START_LIST
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#endif
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/* now include the error codes */
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#include FT_ERROR_DEFINITIONS_H
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#ifdef FT_ERROR_END_LIST
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FT_ERROR_END_LIST
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#endif
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/*******************************************************************/
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/*******************************************************************/
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/***** *****/
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/***** SIMPLE CLEANUP *****/
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/***** *****/
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/*******************************************************************/
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/*******************************************************************/
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#ifdef FT_NEED_EXTERN_C
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}
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#endif
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#undef FT_ERROR_START_LIST
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#undef FT_ERROR_END_LIST
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#undef FT_ERRORDEF
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#undef FT_ERRORDEF_
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#undef FT_NOERRORDEF_
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#undef FT_NEED_EXTERN_C
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#undef FT_ERR_CONCAT
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#undef FT_ERR_BASE
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/* FT_KEEP_ERR_PREFIX is needed for ftvalid.h */
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#ifndef FT_KEEP_ERR_PREFIX
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#undef FT_ERR_PREFIX
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#endif
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#endif /* __FTERRORS_H__ */
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/* END */
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