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/****************************************************************************
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*
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* psread.c
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*
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* Adobe's code for stream handling (body).
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*
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* Copyright 2007-2013 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,
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* LICENSE.TXT. Additionally, subject to the terms and conditions of the
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* FreeType Project License, each contributor to the Work hereby grants
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* to any individual or legal entity exercising permissions granted by
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* the FreeType Project License and this section (hereafter, "You" or
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* "Your") a perpetual, worldwide, non-exclusive, no-charge,
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* royalty-free, irrevocable (except as stated in this section) patent
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* 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
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* patent claims licensable by such contributor that are necessarily
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* infringed by their contribution(s) alone or by combination of their
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* contribution(s) with the Work to which such contribution(s) was
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* submitted. If You institute patent litigation against any entity
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* (including a cross-claim or counterclaim in a lawsuit) alleging that
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* the Work or a contribution incorporated within the Work constitutes
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* direct or contributory patent infringement, then any patent licenses
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* granted to You under this License for that Work shall terminate as of
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* 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
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* have read and understood the terms and conditions of the
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* FreeType Project License as well as those provided in this section,
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* and you accept them fully.
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*
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*/
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49234
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#include "psft.h"
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#include FT_INTERNAL_DEBUG_H
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#include "psglue.h"
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#include "pserror.h"
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/* Define CF2_IO_FAIL as 1 to enable random errors and random */
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/* value errors in I/O. */
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#define CF2_IO_FAIL 0
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#if CF2_IO_FAIL
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/* set the .00 value to a nonzero probability */
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static int
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randomError2( void )
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{
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/* for region buffer ReadByte (interp) function */
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return (double)rand() / RAND_MAX < .00;
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}
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/* set the .00 value to a nonzero probability */
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static CF2_Int
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randomValue()
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{
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return (double)rand() / RAND_MAX < .00 ? rand() : 0;
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}
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#endif /* CF2_IO_FAIL */
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/* Region Buffer */
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/* */
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/* Can be constructed from a copied buffer managed by */
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/* `FCM_getDatablock'. */
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/* Reads bytes with check for end of buffer. */
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/* reading past the end of the buffer sets error and returns zero */
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FT_LOCAL_DEF( CF2_Int )
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cf2_buf_readByte( CF2_Buffer buf )
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{
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if ( buf->ptr < buf->end )
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{
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#if CF2_IO_FAIL
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if ( randomError2() )
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{
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CF2_SET_ERROR( buf->error, Invalid_Stream_Operation );
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return 0;
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}
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return *(buf->ptr)++ + randomValue();
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#else
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return *(buf->ptr)++;
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#endif
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}
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else
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{
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CF2_SET_ERROR( buf->error, Invalid_Stream_Operation );
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return 0;
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}
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}
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/* note: end condition can occur without error */
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FT_LOCAL_DEF( FT_Bool )
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cf2_buf_isEnd( CF2_Buffer buf )
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{
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return FT_BOOL( buf->ptr >= buf->end );
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49234
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}
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/* END */
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