LCOV - app.info - gfx/cairo/cairo/src/cairo-base85-stream.c

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                 : }

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