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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /***************************************************************************/ |
| 2 | /* */ |
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| 3 | /* cf2read.c */ |
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| 4 | /* */ |
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| 5 | /* Adobe's code for stream handling (body). */ |
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| 6 | /* */ |
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| 7 | /* Copyright 2007-2013 Adobe Systems Incorporated. */ |
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| 8 | /* */ |
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| 9 | /* This software, and all works of authorship, whether in source or */ |
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| 10 | /* object code form as indicated by the copyright notice(s) included */ |
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| 11 | /* herein (collectively, the "Work") is made available, and may only be */ |
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| 12 | /* used, modified, and distributed under the FreeType Project License, */ |
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| 13 | /* LICENSE.TXT. Additionally, subject to the terms and conditions of the */ |
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| 14 | /* FreeType Project License, each contributor to the Work hereby grants */ |
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| 15 | /* to any individual or legal entity exercising permissions granted by */ |
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| 16 | /* the FreeType Project License and this section (hereafter, "You" or */ |
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| 17 | /* "Your") a perpetual, worldwide, non-exclusive, no-charge, */ |
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| 18 | /* royalty-free, irrevocable (except as stated in this section) patent */ |
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| 19 | /* license to make, have made, use, offer to sell, sell, import, and */ |
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| 20 | /* otherwise transfer the Work, where such license applies only to those */ |
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| 21 | /* patent claims licensable by such contributor that are necessarily */ |
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| 22 | /* infringed by their contribution(s) alone or by combination of their */ |
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| 23 | /* contribution(s) with the Work to which such contribution(s) was */ |
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| 24 | /* submitted. If You institute patent litigation against any entity */ |
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| 25 | /* (including a cross-claim or counterclaim in a lawsuit) alleging that */ |
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| 26 | /* the Work or a contribution incorporated within the Work constitutes */ |
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| 27 | /* direct or contributory patent infringement, then any patent licenses */ |
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| 28 | /* granted to You under this License for that Work shall terminate as of */ |
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| 29 | /* the date such litigation is filed. */ |
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| 30 | /* */ |
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| 31 | /* By using, modifying, or distributing the Work you indicate that you */ |
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| 32 | /* have read and understood the terms and conditions of the */ |
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| 33 | /* FreeType Project License as well as those provided in this section, */ |
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| 34 | /* and you accept them fully. */ |
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| 35 | /* */ |
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| 36 | /***************************************************************************/ |
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| 37 | |||
| 38 | |||
| 39 | #include "cf2ft.h" |
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| 40 | #include FT_INTERNAL_DEBUG_H |
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| 41 | |||
| 42 | #include "cf2glue.h" |
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| 43 | |||
| 44 | #include "cf2error.h" |
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| 45 | |||
| 46 | |||
| 47 | /* Define CF2_IO_FAIL as 1 to enable random errors and random */ |
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| 48 | /* value errors in I/O. */ |
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| 49 | #define CF2_IO_FAIL 0 |
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| 50 | |||
| 51 | |||
| 52 | #if CF2_IO_FAIL |
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| 53 | |||
| 54 | /* set the .00 value to a nonzero probability */ |
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| 55 | static int |
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| 56 | randomError2( void ) |
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| 57 | { |
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| 58 | /* for region buffer ReadByte (interp) function */ |
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| 59 | return (double)rand() / RAND_MAX < .00; |
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| 60 | } |
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| 61 | |||
| 62 | /* set the .00 value to a nonzero probability */ |
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| 63 | static CF2_Int |
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| 64 | randomValue() |
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| 65 | { |
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| 66 | return (double)rand() / RAND_MAX < .00 ? rand() : 0; |
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| 67 | } |
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| 68 | |||
| 69 | #endif /* CF2_IO_FAIL */ |
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| 70 | |||
| 71 | |||
| 72 | /* Region Buffer */ |
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| 73 | /* */ |
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| 74 | /* Can be constructed from a copied buffer managed by */ |
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| 75 | /* `FCM_getDatablock'. */ |
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| 76 | /* Reads bytes with check for end of buffer. */ |
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| 77 | |||
| 78 | /* reading past the end of the buffer sets error and returns zero */ |
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| 79 | FT_LOCAL_DEF( CF2_Int ) |
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| 80 | cf2_buf_readByte( CF2_Buffer buf ) |
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| 81 | { |
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| 82 | if ( buf->ptr < buf->end ) |
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| 83 | { |
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| 84 | #if CF2_IO_FAIL |
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| 85 | if ( randomError2() ) |
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| 86 | { |
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| 87 | CF2_SET_ERROR( buf->error, Invalid_Stream_Operation ); |
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| 88 | return 0; |
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| 89 | } |
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| 90 | |||
| 91 | return *(buf->ptr)++ + randomValue(); |
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| 92 | #else |
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| 93 | return *(buf->ptr)++; |
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| 94 | #endif |
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| 95 | } |
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| 96 | else |
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| 97 | { |
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| 98 | CF2_SET_ERROR( buf->error, Invalid_Stream_Operation ); |
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| 99 | return 0; |
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| 100 | } |
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| 101 | } |
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| 102 | |||
| 103 | |||
| 104 | /* note: end condition can occur without error */ |
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| 105 | FT_LOCAL_DEF( FT_Bool ) |
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| 106 | cf2_buf_isEnd( CF2_Buffer buf ) |
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| 107 | { |
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| 108 | return (FT_Bool)( buf->ptr >= buf->end ); |
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| 109 | } |
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| 110 | |||
| 111 | |||
| 112 | /* END */ |