1ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/***************************************************************************/ 2ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* */ 3ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* cf2read.c */ 4ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* */ 5ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Adobe's code for stream handling (body). */ 6ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* */ 7ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Copyright 2007-2013 Adobe Systems Incorporated. */ 8ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* */ 9ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* This software, and all works of authorship, whether in source or */ 10ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* object code form as indicated by the copyright notice(s) included */ 11ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* herein (collectively, the "Work") is made available, and may only be */ 12ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* used, modified, and distributed under the FreeType Project License, */ 13ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* LICENSE.TXT. Additionally, subject to the terms and conditions of the */ 14ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* FreeType Project License, each contributor to the Work hereby grants */ 15ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* to any individual or legal entity exercising permissions granted by */ 16ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* the FreeType Project License and this section (hereafter, "You" or */ 17ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* "Your") a perpetual, worldwide, non-exclusive, no-charge, */ 18ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* royalty-free, irrevocable (except as stated in this section) patent */ 19ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* license to make, have made, use, offer to sell, sell, import, and */ 20ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* otherwise transfer the Work, where such license applies only to those */ 21ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* patent claims licensable by such contributor that are necessarily */ 22ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* infringed by their contribution(s) alone or by combination of their */ 23ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* contribution(s) with the Work to which such contribution(s) was */ 24ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* submitted. If You institute patent litigation against any entity */ 25ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* (including a cross-claim or counterclaim in a lawsuit) alleging that */ 26ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* the Work or a contribution incorporated within the Work constitutes */ 27ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* direct or contributory patent infringement, then any patent licenses */ 28ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* granted to You under this License for that Work shall terminate as of */ 29ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* the date such litigation is filed. */ 30ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* */ 31ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* By using, modifying, or distributing the Work you indicate that you */ 32ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* have read and understood the terms and conditions of the */ 33ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* FreeType Project License as well as those provided in this section, */ 34ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* and you accept them fully. */ 35ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* */ 36ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/***************************************************************************/ 37ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 38ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 39ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#include "cf2ft.h" 40e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#include FT_INTERNAL_DEBUG_H 41ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 42ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#include "cf2glue.h" 43ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 44ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#include "cf2error.h" 45ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 46ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 47ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Define CF2_IO_FAIL as 1 to enable random errors and random */ 48ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* value errors in I/O. */ 49ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define CF2_IO_FAIL 0 50ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 51ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 52ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#if CF2_IO_FAIL 53ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 54ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* set the .00 value to a nonzero probability */ 55ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov static int 56ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov randomError2( void ) 57ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 58ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* for region buffer ReadByte (interp) function */ 59ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return (double)rand() / RAND_MAX < .00; 60ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 61ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 62ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* set the .00 value to a nonzero probability */ 63ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov static CF2_Int 64ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov randomValue() 65ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 66ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return (double)rand() / RAND_MAX < .00 ? rand() : 0; 67ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 68ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 69ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif /* CF2_IO_FAIL */ 70ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 71ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 72ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Region Buffer */ 73ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 74ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Can be constructed from a copied buffer managed by */ 75ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* `FCM_getDatablock'. */ 76ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Reads bytes with check for end of buffer. */ 77ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 78ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* reading past the end of the buffer sets error and returns zero */ 79ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_LOCAL_DEF( CF2_Int ) 80ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cf2_buf_readByte( CF2_Buffer buf ) 81ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 82ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if ( buf->ptr < buf->end ) 83ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 84ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#if CF2_IO_FAIL 85ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if ( randomError2() ) 86ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 87ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov CF2_SET_ERROR( buf->error, Invalid_Stream_Operation ); 88ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return 0; 89ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 90ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 91ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return *(buf->ptr)++ + randomValue(); 92ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#else 93ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return *(buf->ptr)++; 94ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 95ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 96ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov else 97ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 98ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov CF2_SET_ERROR( buf->error, Invalid_Stream_Operation ); 99ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return 0; 100ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 101ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 102ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 103ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 104ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* note: end condition can occur without error */ 105ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_LOCAL_DEF( FT_Bool ) 106ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cf2_buf_isEnd( CF2_Buffer buf ) 107ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 108ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return (FT_Bool)( buf->ptr >= buf->end ); 109ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 110ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 111ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 112ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* END */ 113