ref: 730b6d7468327f918472b7780c159d688c68590c
dir: /src/cff/cf2read.c/
/***************************************************************************/ /* */ /* cf2read.c */ /* */ /* Adobe's code for stream handling (body). */ /* */ /* Copyright 2007-2013 Adobe Systems Incorporated. */ /* */ /* This software, and all works of authorship, whether in source or */ /* object code form as indicated by the copyright notice(s) included */ /* herein (collectively, the "Work") is made available, and may only be */ /* used, modified, and distributed under the FreeType Project License, */ /* LICENSE.TXT. Additionally, subject to the terms and conditions of the */ /* FreeType Project License, each contributor to the Work hereby grants */ /* to any individual or legal entity exercising permissions granted by */ /* the FreeType Project License and this section (hereafter, "You" or */ /* "Your") a perpetual, worldwide, non-exclusive, no-charge, */ /* royalty-free, irrevocable (except as stated in this section) patent */ /* license to make, have made, use, offer to sell, sell, import, and */ /* otherwise transfer the Work, where such license applies only to those */ /* patent claims licensable by such contributor that are necessarily */ /* infringed by their contribution(s) alone or by combination of their */ /* contribution(s) with the Work to which such contribution(s) was */ /* submitted. If You institute patent litigation against any entity */ /* (including a cross-claim or counterclaim in a lawsuit) alleging that */ /* the Work or a contribution incorporated within the Work constitutes */ /* direct or contributory patent infringement, then any patent licenses */ /* granted to You under this License for that Work shall terminate as of */ /* the date such litigation is filed. */ /* */ /* By using, modifying, or distributing the Work you indicate that you */ /* have read and understood the terms and conditions of the */ /* FreeType Project License as well as those provided in this section, */ /* and you accept them fully. */ /* */ /***************************************************************************/ #include "cf2ft.h" #include FT_INTERNAL_DEBUG_H #include "cf2glue.h" #include "cf2error.h" /* Define CF2_IO_FAIL as 1 to enable random errors and random */ /* value errors in I/O. */ #define CF2_IO_FAIL 0 #if CF2_IO_FAIL /* set the .00 value to a nonzero probability */ static int randomError2( void ) { /* for region buffer ReadByte (interp) function */ return (double)rand() / RAND_MAX < .00; } /* set the .00 value to a nonzero probability */ static CF2_Int randomValue() { return (double)rand() / RAND_MAX < .00 ? rand() : 0; } #endif /* CF2_IO_FAIL */ /* Region Buffer */ /* */ /* Can be constructed from a copied buffer managed by */ /* `FCM_getDatablock'. */ /* Reads bytes with check for end of buffer. */ /* reading past the end of the buffer sets error and returns zero */ FT_LOCAL_DEF( CF2_Int ) cf2_buf_readByte( CF2_Buffer buf ) { if ( buf->ptr < buf->end ) { #if CF2_IO_FAIL if ( randomError2() ) { CF2_SET_ERROR( buf->error, Invalid_Stream_Operation ); return 0; } return *(buf->ptr)++ + randomValue(); #else return *(buf->ptr)++; #endif } else { CF2_SET_ERROR( buf->error, Invalid_Stream_Operation ); return 0; } } /* note: end condition can occur without error */ FT_LOCAL_DEF( FT_Bool ) cf2_buf_isEnd( CF2_Buffer buf ) { return (FT_Bool)( buf->ptr >= buf->end ); } /* END */