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| 1 /***************************************************************************/ | |
| 2 /* */ | |
| 3 /* cf2read.c */ | |
| 4 /* */ | |
| 5 /* Adobe's code for stream handling (body). */ | |
| 6 /* */ | |
| 7 /* Copyright 2007-2013 Adobe Systems Incorporated. */ | |
| 8 /* */ | |
| 9 /* This software, and all works of authorship, whether in source or */ | |
| 10 /* object code form as indicated by the copyright notice(s) included */ | |
| 11 /* herein (collectively, the "Work") is made available, and may only be */ | |
| 12 /* 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 */ | |
| 20 /* 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 */ | |
| 24 /* 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. */ | |
| 30 /* */ | |
| 31 /* 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 /***************************************************************************/ | |
| 37 | |
| 38 | |
| 39 #include "cf2ft.h" | |
| 40 #include "../../include/freetype/internal/ftdebug.h" | |
| 41 | |
| 42 #include "cf2glue.h" | |
| 43 | |
| 44 #include "cf2error.h" | |
| 45 | |
| 46 | |
| 47 /* Define CF2_IO_FAIL as 1 to enable random errors and random */ | |
| 48 /* value errors in I/O. */ | |
| 49 #define CF2_IO_FAIL 0 | |
| 50 | |
| 51 | |
| 52 #if CF2_IO_FAIL | |
| 53 | |
| 54 /* set the .00 value to a nonzero probability */ | |
| 55 static int | |
| 56 randomError2( void ) | |
| 57 { | |
| 58 /* for region buffer ReadByte (interp) function */ | |
| 59 return (double)rand() / RAND_MAX < .00; | |
| 60 } | |
| 61 | |
| 62 /* set the .00 value to a nonzero probability */ | |
| 63 static CF2_Int | |
| 64 randomValue() | |
| 65 { | |
| 66 return (double)rand() / RAND_MAX < .00 ? rand() : 0; | |
| 67 } | |
| 68 | |
| 69 #endif /* CF2_IO_FAIL */ | |
| 70 | |
| 71 | |
| 72 /* Region Buffer */ | |
| 73 /* */ | |
| 74 /* Can be constructed from a copied buffer managed by */ | |
| 75 /* `FCM_getDatablock'. */ | |
| 76 /* Reads bytes with check for end of buffer. */ | |
| 77 | |
| 78 /* reading past the end of the buffer sets error and returns zero */ | |
| 79 FT_LOCAL_DEF( CF2_Int ) | |
| 80 cf2_buf_readByte( CF2_Buffer buf ) | |
| 81 { | |
| 82 if ( buf->ptr < buf->end ) | |
| 83 { | |
| 84 #if CF2_IO_FAIL | |
| 85 if ( randomError2() ) | |
| 86 { | |
| 87 CF2_SET_ERROR( buf->error, Invalid_Stream_Operation ); | |
| 88 return 0; | |
| 89 } | |
| 90 | |
| 91 return *(buf->ptr)++ + randomValue(); | |
| 92 #else | |
| 93 return *(buf->ptr)++; | |
| 94 #endif | |
| 95 } | |
| 96 else | |
| 97 { | |
| 98 CF2_SET_ERROR( buf->error, Invalid_Stream_Operation ); | |
| 99 return 0; | |
| 100 } | |
| 101 } | |
| 102 | |
| 103 | |
| 104 /* note: end condition can occur without error */ | |
| 105 FT_LOCAL_DEF( FT_Bool ) | |
| 106 cf2_buf_isEnd( CF2_Buffer buf ) | |
| 107 { | |
| 108 return (FT_Bool)( buf->ptr >= buf->end ); | |
| 109 } | |
| 110 | |
| 111 | |
| 112 /* END */ | |
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Chromium Code Reviews
Issue 815103002:
Update freetype to 2.5.4. (Closed)
Base URL: https://pdfium.googlesource.com/pdfium.git@master