| /***************************************************************************/ |
| /* */ |
| /* cf2error.h */ |
| /* */ |
| /* Adobe's code for error handling (specification). */ |
| /* */ |
| /* Copyright 2006-2013 Adobe Systems Incorporated. */ |
| /* */ |
| /* This software, and all works of authorship, whether in source or */ |
| /* object code form as indicated by the copyright notice(s) included */ |
| /* herein (collectively, the "Work") is made available, and may only be */ |
| /* used, modified, and distributed under the FreeType Project License, */ |
| /* LICENSE.TXT. Additionally, subject to the terms and conditions of the */ |
| /* FreeType Project License, each contributor to the Work hereby grants */ |
| /* to any individual or legal entity exercising permissions granted by */ |
| /* the FreeType Project License and this section (hereafter, "You" or */ |
| /* "Your") a perpetual, worldwide, non-exclusive, no-charge, */ |
| /* royalty-free, irrevocable (except as stated in this section) patent */ |
| /* license to make, have made, use, offer to sell, sell, import, and */ |
| /* otherwise transfer the Work, where such license applies only to those */ |
| /* patent claims licensable by such contributor that are necessarily */ |
| /* infringed by their contribution(s) alone or by combination of their */ |
| /* contribution(s) with the Work to which such contribution(s) was */ |
| /* submitted. If You institute patent litigation against any entity */ |
| /* (including a cross-claim or counterclaim in a lawsuit) alleging that */ |
| /* the Work or a contribution incorporated within the Work constitutes */ |
| /* direct or contributory patent infringement, then any patent licenses */ |
| /* granted to You under this License for that Work shall terminate as of */ |
| /* the date such litigation is filed. */ |
| /* */ |
| /* By using, modifying, or distributing the Work you indicate that you */ |
| /* have read and understood the terms and conditions of the */ |
| /* FreeType Project License as well as those provided in this section, */ |
| /* and you accept them fully. */ |
| /* */ |
| /***************************************************************************/ |
| |
| |
| #ifndef __CF2ERROR_H__ |
| #define __CF2ERROR_H__ |
| |
| |
| #include "../../include/freetype/ftmoderr.h" |
| |
| #undef __FTERRORS_H__ |
| |
| #undef FT_ERR_PREFIX |
| #define FT_ERR_PREFIX CF2_Err_ |
| #define FT_ERR_BASE FT_Mod_Err_CF2 |
| |
| |
| #include "../../include/freetype/fterrors.h" |
| #include "cf2ft.h" |
| |
| |
| FT_BEGIN_HEADER |
| |
| |
| /* |
| * A poor-man error facility. |
| * |
| * This code being written in vanilla C, doesn't have the luxury of a |
| * language-supported exception mechanism such as the one available in |
| * Java. Instead, we are stuck with using error codes that must be |
| * carefully managed and preserved. However, it is convenient for us to |
| * model our error mechanism on a Java-like exception mechanism. |
| * When we assign an error code we are thus `throwing' an error. |
| * |
| * The perservation of an error code is done by coding convention. |
| * Upon a function call if the error code is anything other than |
| * `FT_Err_Ok', which is guaranteed to be zero, we |
| * will return without altering that error. This will allow the |
| * error to propogate and be handled at the appropriate location in |
| * the code. |
| * |
| * This allows a style of code where the error code is initialized |
| * up front and a block of calls are made with the error code only |
| * being checked after the block. If a new error occurs, the original |
| * error will be preserved and a functional no-op should result in any |
| * subsequent function that has an initial error code not equal to |
| * `FT_Err_Ok'. |
| * |
| * Errors are encoded by calling the `FT_THROW' macro. For example, |
| * |
| * { |
| * FT_Error e; |
| * |
| * |
| * ... |
| * e = FT_THROW( Out_Of_Memory ); |
| * } |
| * |
| */ |
| |
| |
| /* Set error code to a particular value. */ |
| FT_LOCAL( void ) |
| cf2_setError( FT_Error* error, |
| FT_Error value ); |
| |
| |
| /* |
| * A macro that conditionally sets an error code. |
| * |
| * This macro will first check whether `error' is set; |
| * if not, it will set it to `e'. |
| * |
| */ |
| #define CF2_SET_ERROR( error, e ) \ |
| cf2_setError( error, FT_THROW( e ) ) |
| |
| |
| FT_END_HEADER |
| |
| |
| #endif /* __CF2ERROR_H__ */ |
| |
| |
| /* END */ |