kc3-lang/freetype/src/cff/cf2read.c

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• Hash : 283c8ed8
  Author :
  Date : 2013-04-13T15:02:31
  

  [cff] New files for Adobe's Type 2 interpreter and hinting engine.

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• 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      */
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  /*  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  */
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  /*                                                                         */
  /*  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 buf->ptr >= buf->end;
    }
  
  
  /* END */
  

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