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Examples
pserror.h
Go to the documentation of this file.
1
/****************************************************************************
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*
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* pserror.h
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*
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* Adobe's code for error handling (specification).
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*
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* Copyright 2006-2013 Adobe Systems Incorporated.
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*
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* This software, and all works of authorship, whether in source or
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* object code form as indicated by the copyright notice(s) included
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* herein (collectively, the "Work") is made available, and may only be
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* used, modified, and distributed under the FreeType Project License,
13
* LICENSE.TXT. Additionally, subject to the terms and conditions of the
14
* FreeType Project License, each contributor to the Work hereby grants
15
* to any individual or legal entity exercising permissions granted by
16
* the FreeType Project License and this section (hereafter, "You" or
17
* "Your") a perpetual, worldwide, non-exclusive, no-charge,
18
* royalty-free, irrevocable (except as stated in this section) patent
19
* license to make, have made, use, offer to sell, sell, import, and
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* otherwise transfer the Work, where such license applies only to those
21
* patent claims licensable by such contributor that are necessarily
22
* infringed by their contribution(s) alone or by combination of their
23
* contribution(s) with the Work to which such contribution(s) was
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* submitted. If You institute patent litigation against any entity
25
* (including a cross-claim or counterclaim in a lawsuit) alleging that
26
* the Work or a contribution incorporated within the Work constitutes
27
* direct or contributory patent infringement, then any patent licenses
28
* granted to You under this License for that Work shall terminate as of
29
* the date such litigation is filed.
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*
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* By using, modifying, or distributing the Work you indicate that you
32
* have read and understood the terms and conditions of the
33
* FreeType Project License as well as those provided in this section,
34
* and you accept them fully.
35
*
36
*/
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#ifndef PSERROR_H_
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#define PSERROR_H_
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#include FT_MODULE_ERRORS_H
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#undef FTERRORS_H_
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#undef FT_ERR_PREFIX
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#define FT_ERR_PREFIX CF2_Err_
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#define FT_ERR_BASE FT_Mod_Err_CF2
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#include FT_ERRORS_H
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#include "
psft.h
"
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FT_BEGIN_HEADER
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/*
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* A poor-man error facility.
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*
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* This code being written in vanilla C, doesn't have the luxury of a
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* language-supported exception mechanism such as the one available in
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* Java. Instead, we are stuck with using error codes that must be
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* carefully managed and preserved. However, it is convenient for us to
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* model our error mechanism on a Java-like exception mechanism.
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* When we assign an error code we are thus `throwing' an error.
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*
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* The preservation of an error code is done by coding convention.
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* Upon a function call if the error code is anything other than
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* `FT_Err_Ok', which is guaranteed to be zero, we
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* will return without altering that error. This will allow the
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* error to propagate and be handled at the appropriate location in
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* the code.
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*
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* This allows a style of code where the error code is initialized
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* up front and a block of calls are made with the error code only
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* being checked after the block. If a new error occurs, the original
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* error will be preserved and a functional no-op should result in any
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* subsequent function that has an initial error code not equal to
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* `FT_Err_Ok'.
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*
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* Errors are encoded by calling the `FT_THROW' macro. For example,
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*
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* {
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* FT_Error e;
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*
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*
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* ...
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* e = FT_THROW( Out_Of_Memory );
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* }
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*
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*/
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/* Set error code to a particular value. */
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FT_LOCAL
(
void
)
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cf2_setError
(
FT_Error
*
error
,
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FT_Error
value
);
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101
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/*
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* A macro that conditionally sets an error code.
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*
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* This macro will first check whether `error' is set;
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* if not, it will set it to `e'.
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*
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*/
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#define CF2_SET_ERROR( error, e ) \
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cf2_setError( error, FT_THROW( e ) )
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FT_END_HEADER
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#endif
/* PSERROR_H_ */
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/* END */
FT_LOCAL
#define FT_LOCAL(x)
Definition:
ftconfig.h:386
FT_END_HEADER
#define FT_END_HEADER
Definition:
ftheader.h:54
FT_BEGIN_HEADER
#define FT_BEGIN_HEADER
Definition:
ftheader.h:36
FT_Error
int FT_Error
Definition:
fttypes.h:299
error
#define error(str)
Definition:
mkdosfs.c:1605
cf2_setError
FT_BEGIN_HEADER cf2_setError(FT_Error *error, FT_Error value)
Definition:
pserror.c:44
psft.h
value
Definition:
pdh_main.c:96
sdk
lib
3rdparty
freetype
src
psaux
pserror.h
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