LCOV - code coverage report
Current view: directory - gfx/cairo/cairo/src - cairo-base85-stream.c (source / functions) Found Hit Coverage
Test: app.info Lines: 42 0 0.0 %
Date: 2012-06-02 Functions: 4 0 0.0 %

       1                 : /* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */
       2                 : /* cairo - a vector graphics library with display and print output
       3                 :  *
       4                 :  * Copyright © 2005 Red Hat, Inc
       5                 :  *
       6                 :  * This library is free software; you can redistribute it and/or
       7                 :  * modify it either under the terms of the GNU Lesser General Public
       8                 :  * License version 2.1 as published by the Free Software Foundation
       9                 :  * (the "LGPL") or, at your option, under the terms of the Mozilla
      10                 :  * Public License Version 1.1 (the "MPL"). If you do not alter this
      11                 :  * notice, a recipient may use your version of this file under either
      12                 :  * the MPL or the LGPL.
      13                 :  *
      14                 :  * You should have received a copy of the LGPL along with this library
      15                 :  * in the file COPYING-LGPL-2.1; if not, write to the Free Software
      16                 :  * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
      17                 :  * You should have received a copy of the MPL along with this library
      18                 :  * in the file COPYING-MPL-1.1
      19                 :  *
      20                 :  * The contents of this file are subject to the Mozilla Public License
      21                 :  * Version 1.1 (the "License"); you may not use this file except in
      22                 :  * compliance with the License. You may obtain a copy of the License at
      23                 :  * http://www.mozilla.org/MPL/
      24                 :  *
      25                 :  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
      26                 :  * OF ANY KIND, either express or implied. See the LGPL or the MPL for
      27                 :  * the specific language governing rights and limitations.
      28                 :  *
      29                 :  * The Original Code is the cairo graphics library.
      30                 :  *
      31                 :  * The Initial Developer of the Original Code is Red Hat, Inc.
      32                 :  *
      33                 :  * Author(s):
      34                 :  *      Kristian Høgsberg <krh@redhat.com>
      35                 :  */
      36                 : 
      37                 : #include "cairoint.h"
      38                 : #include "cairo-error-private.h"
      39                 : #include "cairo-output-stream-private.h"
      40                 : 
      41                 : typedef struct _cairo_base85_stream {
      42                 :     cairo_output_stream_t base;
      43                 :     cairo_output_stream_t *output;
      44                 :     unsigned char four_tuple[4];
      45                 :     int pending;
      46                 : } cairo_base85_stream_t;
      47                 : 
      48                 : static void
      49               0 : _expand_four_tuple_to_five (unsigned char four_tuple[4],
      50                 :                             unsigned char five_tuple[5],
      51                 :                             cairo_bool_t *all_zero)
      52                 : {
      53                 :     uint32_t value;
      54                 :     int digit, i;
      55                 : 
      56               0 :     value = four_tuple[0] << 24 | four_tuple[1] << 16 | four_tuple[2] << 8 | four_tuple[3];
      57               0 :     if (all_zero)
      58               0 :         *all_zero = TRUE;
      59               0 :     for (i = 0; i < 5; i++) {
      60               0 :         digit = value % 85;
      61               0 :         if (digit != 0 && all_zero)
      62               0 :             *all_zero = FALSE;
      63               0 :         five_tuple[4-i] = digit + 33;
      64               0 :         value = value / 85;
      65                 :     }
      66               0 : }
      67                 : 
      68                 : static cairo_status_t
      69               0 : _cairo_base85_stream_write (cairo_output_stream_t *base,
      70                 :                             const unsigned char   *data,
      71                 :                             unsigned int           length)
      72                 : {
      73               0 :     cairo_base85_stream_t *stream = (cairo_base85_stream_t *) base;
      74               0 :     const unsigned char *ptr = data;
      75                 :     unsigned char five_tuple[5];
      76                 :     cairo_bool_t is_zero;
      77                 : 
      78               0 :     while (length) {
      79               0 :         stream->four_tuple[stream->pending++] = *ptr++;
      80               0 :         length--;
      81               0 :         if (stream->pending == 4) {
      82               0 :             _expand_four_tuple_to_five (stream->four_tuple, five_tuple, &is_zero);
      83               0 :             if (is_zero)
      84               0 :                 _cairo_output_stream_write (stream->output, "z", 1);
      85                 :             else
      86               0 :                 _cairo_output_stream_write (stream->output, five_tuple, 5);
      87               0 :             stream->pending = 0;
      88                 :         }
      89                 :     }
      90                 : 
      91               0 :     return _cairo_output_stream_get_status (stream->output);
      92                 : }
      93                 : 
      94                 : static cairo_status_t
      95               0 : _cairo_base85_stream_close (cairo_output_stream_t *base)
      96                 : {
      97               0 :     cairo_base85_stream_t *stream = (cairo_base85_stream_t *) base;
      98                 :     unsigned char five_tuple[5];
      99                 : 
     100               0 :     if (stream->pending) {
     101               0 :         memset (stream->four_tuple + stream->pending, 0, 4 - stream->pending);
     102               0 :         _expand_four_tuple_to_five (stream->four_tuple, five_tuple, NULL);
     103               0 :         _cairo_output_stream_write (stream->output, five_tuple, stream->pending + 1);
     104                 :     }
     105                 : 
     106               0 :     return _cairo_output_stream_get_status (stream->output);
     107                 : }
     108                 : 
     109                 : cairo_output_stream_t *
     110               0 : _cairo_base85_stream_create (cairo_output_stream_t *output)
     111                 : {
     112                 :     cairo_base85_stream_t *stream;
     113                 : 
     114               0 :     if (output->status)
     115               0 :         return _cairo_output_stream_create_in_error (output->status);
     116                 : 
     117               0 :     stream = malloc (sizeof (cairo_base85_stream_t));
     118               0 :     if (unlikely (stream == NULL)) {
     119               0 :         _cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
     120               0 :         return (cairo_output_stream_t *) &_cairo_output_stream_nil;
     121                 :     }
     122                 : 
     123               0 :     _cairo_output_stream_init (&stream->base,
     124                 :                                _cairo_base85_stream_write,
     125                 :                                NULL,
     126                 :                                _cairo_base85_stream_close);
     127               0 :     stream->output = output;
     128               0 :     stream->pending = 0;
     129                 : 
     130               0 :     return &stream->base;
     131                 : }

Generated by: LCOV version 1.7