cf2read.c revision ec0bab5697bb31ba980810145f62e3799946ec60
1c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/***************************************************************************/ 2c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/* */ 3c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/* cf2read.c */ 4c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/* */ 5c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/* Adobe's code for stream handling (body). */ 6c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/* */ 7cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)/* Copyright 2007-2013 Adobe Systems Incorporated. */ 8cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)/* */ 9c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/* This software, and all works of authorship, whether in source or */ 10c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/* object code form as indicated by the copyright notice(s) included */ 11c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/* herein (collectively, the "Work") is made available, and may only be */ 12cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)/* used, modified, and distributed under the FreeType Project License, */ 13cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)/* LICENSE.TXT. Additionally, subject to the terms and conditions of the */ 14c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/* FreeType Project License, each contributor to the Work hereby grants */ 158bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles)/* to any individual or legal entity exercising permissions granted by */ 16cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)/* the FreeType Project License and this section (hereafter, "You" or */ 17c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/* "Your") a perpetual, worldwide, non-exclusive, no-charge, */ 181320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci/* royalty-free, irrevocable (except as stated in this section) patent */ 19b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)/* license to make, have made, use, offer to sell, sell, import, and */ 20116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch/* otherwise transfer the Work, where such license applies only to those */ 21c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/* patent claims licensable by such contributor that are necessarily */ 22c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/* infringed by their contribution(s) alone or by combination of their */ 23c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/* contribution(s) with the Work to which such contribution(s) was */ 24c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/* submitted. If You institute patent litigation against any entity */ 25c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/* (including a cross-claim or counterclaim in a lawsuit) alleging that */ 2690dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles)/* the Work or a contribution incorporated within the Work constitutes */ 27c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/* direct or contributory patent infringement, then any patent licenses */ 28c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/* granted to You under this License for that Work shall terminate as of */ 2990dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles)/* the date such litigation is filed. */ 30c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/* */ 31c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/* By using, modifying, or distributing the Work you indicate that you */ 32c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/* have read and understood the terms and conditions of the */ 33c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/* FreeType Project License as well as those provided in this section, */ 34c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/* and you accept them fully. */ 35116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch/* */ 36116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch/***************************************************************************/ 37c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 38c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 39c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#include "cf2ft.h" 40c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#include FT_INTERNAL_DEBUG_H 41c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 42c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#include "cf2glue.h" 43b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 448bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles)#include "cf2error.h" 45c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 46c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 47c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) /* Define CF2_IO_FAIL as 1 to enable random errors and random */ 48c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) /* value errors in I/O. */ 49f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#define CF2_IO_FAIL 0 501320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 51f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 52f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#if CF2_IO_FAIL 53c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 54c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) /* set the .00 value to a nonzero probability */ 55c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) static int 56c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) randomError2( void ) 57c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) { 588bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) /* for region buffer ReadByte (interp) function */ 598bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) return (double)rand() / RAND_MAX < .00; 60c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) } 61c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 62c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) /* set the .00 value to a nonzero probability */ 63116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch static CF2_Int 64116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch randomValue() 65116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch { 66c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) return (double)rand() / RAND_MAX < .00 ? rand() : 0; 67c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) } 68c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 69c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#endif /* CF2_IO_FAIL */ 70c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 71c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 72c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) /* Region Buffer */ 73c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) /* */ 74c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) /* Can be constructed from a copied buffer managed by */ 75c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) /* `FCM_getDatablock'. */ 76c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) /* Reads bytes with check for end of buffer. */ 77c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 78c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) /* reading past the end of the buffer sets error and returns zero */ 79c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) FT_LOCAL_DEF( CF2_Int ) 80c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) cf2_buf_readByte( CF2_Buffer buf ) 81c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) { 82c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) if ( buf->ptr < buf->end ) 831320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci { 84c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#if CF2_IO_FAIL 85c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) if ( randomError2() ) 86c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) { 87c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) CF2_SET_ERROR( buf->error, Invalid_Stream_Operation ); 88c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) return 0; 89c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) } 905f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) 91a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return *(buf->ptr)++ + randomValue(); 92a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#else 935f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) return *(buf->ptr)++; 94a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#endif 95a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 96c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) else 978bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) { 98c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) CF2_SET_ERROR( buf->error, Invalid_Stream_Operation ); 99c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) return 0; 100c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) } 101116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch } 1028bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) 103116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch 104c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) /* note: end condition can occur without error */ 105c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) FT_LOCAL_DEF( FT_Bool ) 106c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) cf2_buf_isEnd( CF2_Buffer buf ) 107116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch { 108c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) return (FT_Bool)( buf->ptr >= buf->end ); 1098bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) } 110116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch 111c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 112c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/* END */ 113c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)