1a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/***************************************************************************/ 2a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* */ 3a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* cf2read.c */ 4a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* */ 5a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* Adobe's code for stream handling (body). */ 6a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* */ 7a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* Copyright 2007-2013 Adobe Systems Incorporated. */ 8a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* */ 9a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* This software, and all works of authorship, whether in source or */ 10a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* object code form as indicated by the copyright notice(s) included */ 11a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* herein (collectively, the "Work") is made available, and may only be */ 12a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* used, modified, and distributed under the FreeType Project License, */ 13a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* LICENSE.TXT. Additionally, subject to the terms and conditions of the */ 14a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* FreeType Project License, each contributor to the Work hereby grants */ 15a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* to any individual or legal entity exercising permissions granted by */ 16a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* the FreeType Project License and this section (hereafter, "You" or */ 17a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* "Your") a perpetual, worldwide, non-exclusive, no-charge, */ 18a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* royalty-free, irrevocable (except as stated in this section) patent */ 19a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* license to make, have made, use, offer to sell, sell, import, and */ 20a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* otherwise transfer the Work, where such license applies only to those */ 21a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* patent claims licensable by such contributor that are necessarily */ 22a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* infringed by their contribution(s) alone or by combination of their */ 23a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* contribution(s) with the Work to which such contribution(s) was */ 24a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* submitted. If You institute patent litigation against any entity */ 25a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* (including a cross-claim or counterclaim in a lawsuit) alleging that */ 26a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* the Work or a contribution incorporated within the Work constitutes */ 27a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* direct or contributory patent infringement, then any patent licenses */ 28a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* granted to You under this License for that Work shall terminate as of */ 29a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* the date such litigation is filed. */ 30a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* */ 31a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* By using, modifying, or distributing the Work you indicate that you */ 32a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* have read and understood the terms and conditions of the */ 33a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* FreeType Project License as well as those provided in this section, */ 34a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* and you accept them fully. */ 35a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* */ 36a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/***************************************************************************/ 37a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang 38a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang 39a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang#include "cf2ft.h" 40a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang#include FT_INTERNAL_DEBUG_H 41a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang 42a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang#include "cf2glue.h" 43a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang 44a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang#include "cf2error.h" 45a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang 46a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang 47a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang /* Define CF2_IO_FAIL as 1 to enable random errors and random */ 48a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang /* value errors in I/O. */ 49a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang#define CF2_IO_FAIL 0 50a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang 51a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang 52a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang#if CF2_IO_FAIL 53a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang 54a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang /* set the .00 value to a nonzero probability */ 55a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang static int 56a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang randomError2( void ) 57a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang { 58a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang /* for region buffer ReadByte (interp) function */ 59a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang return (double)rand() / RAND_MAX < .00; 60a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang } 61a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang 62a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang /* set the .00 value to a nonzero probability */ 63a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang static CF2_Int 64a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang randomValue() 65a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang { 66a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang return (double)rand() / RAND_MAX < .00 ? rand() : 0; 67a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang } 68a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang 69a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang#endif /* CF2_IO_FAIL */ 70a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang 71a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang 72a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang /* Region Buffer */ 73a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang /* */ 74a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang /* Can be constructed from a copied buffer managed by */ 75a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang /* `FCM_getDatablock'. */ 76a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang /* Reads bytes with check for end of buffer. */ 77a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang 78a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang /* reading past the end of the buffer sets error and returns zero */ 79a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang FT_LOCAL_DEF( CF2_Int ) 80a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang cf2_buf_readByte( CF2_Buffer buf ) 81a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang { 82a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang if ( buf->ptr < buf->end ) 83a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang { 84a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang#if CF2_IO_FAIL 85a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang if ( randomError2() ) 86a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang { 87a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang CF2_SET_ERROR( buf->error, Invalid_Stream_Operation ); 88a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang return 0; 89a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang } 90a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang 91a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang return *(buf->ptr)++ + randomValue(); 92a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang#else 93a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang return *(buf->ptr)++; 94a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang#endif 95a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang } 96a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang else 97a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang { 98a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang CF2_SET_ERROR( buf->error, Invalid_Stream_Operation ); 99a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang return 0; 100a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang } 101a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang } 102a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang 103a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang 104a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang /* note: end condition can occur without error */ 105a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang FT_LOCAL_DEF( FT_Bool ) 106a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang cf2_buf_isEnd( CF2_Buffer buf ) 107a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang { 108a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang return buf->ptr >= buf->end; 109a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang } 110a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang 111a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang 112a2b9955b49034a51dfbc8bf9f4e9d312149cecacXianzhu Wang/* END */ 113