Exemple #1
0
  cf2_stack_popInt( CF2_Stack  stack )
  {
    if ( stack->top == &stack->buffer[0] )
    {
      CF2_SET_ERROR( stack->error, Stack_Underflow );
      return 0;   /* underflow */
    }
    if ( stack->top[-1].type != CF2_NumberInt )
    {
      CF2_SET_ERROR( stack->error, Syntax_Error );
      return 0;   /* type mismatch */
    }

    --stack->top;

    return stack->top->u.i;
  }
Exemple #2
0
 cf2_stack_pop( CF2_Stack  stack,
                CF2_UInt   num )
 {
   if ( num > cf2_stack_count( stack ) )
   {
     CF2_SET_ERROR( stack->error, Stack_Underflow );
     return;
   }
   stack->top -= num;
 }
Exemple #3
0
  /* return false on memory error */
  static FT_Bool
  cf2_arrstack_setNumElements( CF2_ArrStack  arrstack,
                               size_t        numElements )
  {
    FT_ASSERT( arrstack != NULL );

    {
      FT_Error   error  = FT_Err_Ok;        /* for FT_REALLOC */
      FT_Memory  memory = arrstack->memory; /* for FT_REALLOC */

      FT_Long  newSize = numElements * arrstack->sizeItem;


      if ( numElements > LONG_MAX / arrstack->sizeItem )
        goto exit;


      FT_ASSERT( newSize > 0 );   /* avoid realloc with zero size */

      if ( !FT_REALLOC( arrstack->ptr, arrstack->totalSize, newSize ) )
      {
        arrstack->allocated = numElements;
        arrstack->totalSize = newSize;

        if ( arrstack->count > numElements )
        {
          /* we truncated the list! */
          CF2_SET_ERROR( arrstack->error, Stack_Overflow );
          arrstack->count = numElements;
          return FALSE;
        }

        return TRUE;     /* success */
      }
    }

  exit:
    /* if there's not already an error, store this one */
    CF2_SET_ERROR( arrstack->error, Out_Of_Memory );

    return FALSE;
  }
Exemple #4
0
  cf2_stack_pushInt( CF2_Stack  stack,
                     CF2_Int    val )
  {
    if ( stack->top == &stack->buffer[CF2_OPERAND_STACK_SIZE] )
    {
      CF2_SET_ERROR( stack->error, Stack_Overflow );
      return;     /* stack overflow */
    }

    stack->top->u.i  = val;
    stack->top->type = CF2_NumberInt;
    ++stack->top;
  }
Exemple #5
0
  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;
    }
  }
Exemple #6
0
  cf2_stack_setReal( CF2_Stack  stack,
                     CF2_UInt   idx,
                     CF2_Fixed  val )
  {
    if ( idx > cf2_stack_count( stack ) )
    {
      CF2_SET_ERROR( stack->error, Stack_Overflow );
      return;
    }

    stack->buffer[idx].u.r  = val;
    stack->buffer[idx].type = CF2_NumberFixed;
  }
Exemple #7
0
  cf2_stack_pushFixed( CF2_Stack  stack,
                       CF2_Fixed  val )
  {
    if ( stack->top == stack->buffer + stack->stackSize )
    {
      CF2_SET_ERROR( stack->error, Stack_Overflow );
      return;     /* stack overflow */
    }

    stack->top->u.r  = val;
    stack->top->type = CF2_NumberFixed;
    stack->top++;
  }
Exemple #8
0
  cf2_stack_pushInt( CF2_Stack  stack,
                     CF2_Int    val )
  {
    if ( stack->top == stack->buffer + stack->stackSize )
    {
      CF2_SET_ERROR( stack->error, Stack_Overflow );
      return;     /* stack overflow */
    }

    stack->top->u.i  = val;
    stack->top->type = CF2_NumberInt;
    stack->top++;
  }
Exemple #9
0
  static size_t
  cf2_hintmask_setCounts( CF2_HintMask  hintmask,
                          size_t        bitCount )
  {
    if ( bitCount > CF2_MAX_HINTS )
    {
      /* total of h and v stems must be <= 96 */
      CF2_SET_ERROR( hintmask->error, Invalid_Glyph_Format );
      return 0;
    }

    hintmask->bitCount  = bitCount;
    hintmask->byteCount = ( hintmask->bitCount + 7 ) / 8;

    hintmask->isValid = TRUE;
    hintmask->isNew   = TRUE;

    return bitCount;
  }
Exemple #10
0
  cf2_arrstack_getPointer( const CF2_ArrStack  arrstack,
                           size_t              idx )
  {
    void*  newPtr;


    FT_ASSERT( arrstack != NULL );

    if ( idx >= arrstack->count )
    {
      /* overflow */
      CF2_SET_ERROR( arrstack->error, Stack_Overflow );
      idx = 0;    /* choose safe default */
    }

    newPtr = (FT_Byte*)arrstack->ptr + idx * arrstack->sizeItem;

    return newPtr;
  }
Exemple #11
0
  cf2_stack_popFixed( CF2_Stack  stack )
  {
    if ( stack->top == &stack->buffer[0] )
    {
      CF2_SET_ERROR( stack->error, Stack_Underflow );
      return cf2_intToFixed( 0 );    /* underflow */
    }

    --stack->top;

    switch ( stack->top->type )
    {
    case CF2_NumberInt:
      return cf2_intToFixed( stack->top->u.i );
    case CF2_NumberFrac:
      return cf2_fracToFixed( stack->top->u.f );
    default:
      return stack->top->u.r;
    }
  }
Exemple #12
0
  cf2_stack_getReal( CF2_Stack  stack,
                     CF2_UInt   idx )
  {
    FT_ASSERT( cf2_stack_count( stack ) <= CF2_OPERAND_STACK_SIZE );

    if ( idx >= cf2_stack_count( stack ) )
    {
      CF2_SET_ERROR( stack->error, Stack_Overflow );
      return cf2_intToFixed( 0 );    /* bounds error */
    }

    switch ( stack->buffer[idx].type )
    {
    case CF2_NumberInt:
      return cf2_intToFixed( stack->buffer[idx].u.i );
    case CF2_NumberFrac:
      return cf2_fracToFixed( stack->buffer[idx].u.f );
    default:
      return stack->buffer[idx].u.r;
    }
  }
Exemple #13
0
  cf2_stack_roll( CF2_Stack  stack,
                  CF2_Int    count,
                  CF2_Int    shift )
  {
    /* we initialize this variable to avoid compiler warnings */
    CF2_StackNumber  last = { { 0 }, CF2_NumberInt };

    CF2_Int  start_idx, idx, i;


    if ( count < 2 )
      return; /* nothing to do (values 0 and 1), or undefined value */

    if ( (CF2_UInt)count > cf2_stack_count( stack ) )
    {
      CF2_SET_ERROR( stack->error, Stack_Overflow );
      return;
    }

    if ( shift < 0 )
      shift = -( ( -shift ) % count );
    else
      shift %= count;

    if ( shift == 0 )
      return; /* nothing to do */

    /* We use the following algorithm to do the rolling, */
    /* which needs two temporary variables only.         */
    /*                                                   */
    /* Example:                                          */
    /*                                                   */
    /*   count = 8                                       */
    /*   shift = 2                                       */
    /*                                                   */
    /*   stack indices before roll:  7 6 5 4 3 2 1 0     */
    /*   stack indices after roll:   1 0 7 6 5 4 3 2     */
    /*                                                   */
    /* The value of index 0 gets moved to index 2, while */
    /* the old value of index 2 gets moved to index 4,   */
    /* and so on.  We thus have the following copying    */
    /* chains for shift value 2.                         */
    /*                                                   */
    /*   0 -> 2 -> 4 -> 6 -> 0                           */
    /*   1 -> 3 -> 5 -> 7 -> 1                           */
    /*                                                   */
    /* If `count' and `shift' are incommensurable, we    */
    /* have a single chain only.  Otherwise, increase    */
    /* the start index by 1 after the first chain, then  */
    /* do the next chain until all elements in all       */
    /* chains are handled.                               */

    start_idx = -1;
    idx       = -1;
    for ( i = 0; i < count; i++ )
    {
      CF2_StackNumber  tmp;


      if ( start_idx == idx )
      {
        start_idx++;
        idx  = start_idx;
        last = stack->buffer[idx];
      }

      idx += shift;
      if ( idx >= count )
        idx -= count;
      else if ( idx < 0 )
        idx += count;

      tmp                = stack->buffer[idx];
      stack->buffer[idx] = last;
      last               = tmp;
    }
  }