pfrcmap.c File Reference

#include <ft2build.h>
#include "pfrcmap.h"
#include "pfrobjs.h"
#include "pfrerror.h"

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Functions
	pfr_cmap_init (PFR_CMap cmap, FT_Pointer pointer)
	pfr_cmap_done (PFR_CMap cmap)
	pfr_cmap_char_index (PFR_CMap cmap, FT_UInt32 char_code)
	pfr_cmap_char_next (PFR_CMap cmap, FT_UInt32 *pchar_code)

Variables
FT_CALLBACK_TABLE_DEF const FT_CMap_ClassRec	pfr_cmap_class_rec

Function Documentation

pfr_cmap_char_index()

pfr_cmap_char_index	(	PFR_CMap	cmap,
		FT_UInt32	char_code
	)

Definition at line 70 of file pfrcmap.c.

  {
    FT_UInt  min = 0;
    FT_UInt  max = cmap->num_chars;


    while ( min < max )
    {
      PFR_Char  gchar;
      FT_UInt   mid;


      mid   = min + ( max - min ) / 2;
      gchar = cmap->chars + mid;

      if ( gchar->char_code == char_code )
        return mid + 1;

      if ( gchar->char_code < char_code )
        min = mid + 1;
      else
        max = mid;
    }
    return 0;
  }

pfr_cmap_char_next()

pfr_cmap_char_next	(	PFR_CMap	cmap,
		FT_UInt32 *	pchar_code
	)

Definition at line 99 of file pfrcmap.c.

  {
    FT_UInt    result    = 0;
    FT_UInt32  char_code = *pchar_code + 1;


  Restart:
    {
      FT_UInt   min = 0;
      FT_UInt   max = cmap->num_chars;
      FT_UInt   mid;
      PFR_Char  gchar;


      while ( min < max )
      {
        mid   = min + ( ( max - min ) >> 1 );
        gchar = cmap->chars + mid;

        if ( gchar->char_code == char_code )
        {
          result = mid;
          if ( result != 0 )
          {
            result++;
            goto Exit;
          }

          char_code++;
          goto Restart;
        }

        if ( gchar->char_code < char_code )
          min = mid + 1;
        else
          max = mid;
      }

      /* we didn't find it, but we have a pair just above it */
      char_code = 0;

      if ( min < cmap->num_chars )
      {
        gchar  = cmap->chars + min;
        result = min;
        if ( result != 0 )
        {
          result++;
          char_code = gchar->char_code;
        }
      }
    }

  Exit:
    *pchar_code = char_code;
    return result;
  }

pfr_cmap_done()

pfr_cmap_done

(

PFR_CMap

cmap

)

Definition at line 62 of file pfrcmap.c.

  {
    cmap->chars     = NULL;
    cmap->num_chars = 0;
  }

pfr_cmap_init()

pfr_cmap_init	(	PFR_CMap	cmap,
		FT_Pointer	pointer
	)

Definition at line 28 of file pfrcmap.c.

  {
    FT_Error  error = FT_Err_Ok;
    PFR_Face  face  = (PFR_Face)FT_CMAP_FACE( cmap );

    FT_UNUSED( pointer );


    cmap->num_chars = face->phy_font.num_chars;
    cmap->chars     = face->phy_font.chars;

    /* just for safety, check that the character entries are correctly */
    /* sorted in increasing character code order                       */
    {
      FT_UInt  n;


      for ( n = 1; n < cmap->num_chars; n++ )
      {
        if ( cmap->chars[n - 1].char_code >= cmap->chars[n].char_code )
        {
          error = FT_THROW( Invalid_Table );
          goto Exit;
        }
      }
    }

  Exit:
    return error;
  }

Variable Documentation

pfr_cmap_class_rec

FT_CALLBACK_TABLE_DEF const FT_CMap_ClassRec pfr_cmap_class_rec

Initial value:

=
  {
    sizeof ( PFR_CMapRec ),

    (FT_CMap_InitFunc)     pfr_cmap_init,        
    (FT_CMap_DoneFunc)     pfr_cmap_done,        
    (FT_CMap_CharIndexFunc)pfr_cmap_char_index,  
    (FT_CMap_CharNextFunc) pfr_cmap_char_next,   

    (FT_CMap_CharVarIndexFunc)    NULL,  
    (FT_CMap_CharVarIsDefaultFunc)NULL,  
    (FT_CMap_VariantListFunc)     NULL,  
    (FT_CMap_CharVariantListFunc) NULL,  
    (FT_CMap_VariantCharListFunc) NULL   
  }

Definition at line 160 of file pfrcmap.c.

Referenced by pfr_face_init().