LCOV - code coverage report
Current view: directory - gfx/cairo/cairo/src - cairo-base64-stream.c (source / functions) Found Hit Coverage
Test: app.info Lines: 46 0 0.0 %
Date: 2012-06-02 Functions: 3 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 © 2005-2007 Emmanuel Pacaud <emmanuel.pacaud@free.fr>
       5                 :  * Copyright © 2009 Chris Wilson
       6                 :  *
       7                 :  * This library is free software; you can redistribute it and/or
       8                 :  * modify it either under the terms of the GNU Lesser General Public
       9                 :  * License version 2.1 as published by the Free Software Foundation
      10                 :  * (the "LGPL") or, at your option, under the terms of the Mozilla
      11                 :  * Public License Version 1.1 (the "MPL"). If you do not alter this
      12                 :  * notice, a recipient may use your version of this file under either
      13                 :  * the MPL or the LGPL.
      14                 :  *
      15                 :  * You should have received a copy of the LGPL along with this library
      16                 :  * in the file COPYING-LGPL-2.1; if not, write to the Free Software
      17                 :  * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
      18                 :  * You should have received a copy of the MPL along with this library
      19                 :  * in the file COPYING-MPL-1.1
      20                 :  *
      21                 :  * The contents of this file are subject to the Mozilla Public License
      22                 :  * Version 1.1 (the "License"); you may not use this file except in
      23                 :  * compliance with the License. You may obtain a copy of the License at
      24                 :  * http://www.mozilla.org/MPL/
      25                 :  *
      26                 :  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
      27                 :  * OF ANY KIND, either express or implied. See the LGPL or the MPL for
      28                 :  * the specific language governing rights and limitations.
      29                 :  *
      30                 :  * The Original Code is the cairo graphics library.
      31                 :  *
      32                 :  * The Initial Developer of the Original Code is Red Hat, Inc.
      33                 :  *
      34                 :  * Author(s):
      35                 :  *      Kristian Høgsberg <krh@redhat.com>
      36                 :  *      Chris Wilson <chris@chris-wilson.co.uk>
      37                 :  */
      38                 : 
      39                 : #include "cairoint.h"
      40                 : #include "cairo-error-private.h"
      41                 : #include "cairo-output-stream-private.h"
      42                 : 
      43                 : typedef struct _cairo_base64_stream {
      44                 :     cairo_output_stream_t base;
      45                 :     cairo_output_stream_t *output;
      46                 :     unsigned int in_mem;
      47                 :     unsigned int trailing;
      48                 :     unsigned char src[3];
      49                 : } cairo_base64_stream_t;
      50                 : 
      51                 : static char const base64_table[64] =
      52                 : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
      53                 : 
      54                 : static cairo_status_t
      55               0 : _cairo_base64_stream_write (cairo_output_stream_t *base,
      56                 :                             const unsigned char   *data,
      57                 :                             unsigned int           length)
      58                 : {
      59               0 :     cairo_base64_stream_t * stream = (cairo_base64_stream_t *) base;
      60               0 :     unsigned char *src = stream->src;
      61                 :     unsigned int i;
      62                 : 
      63               0 :     if (stream->in_mem + length < 3) {
      64               0 :         for (i = 0; i < length; i++) {
      65               0 :             src[i + stream->in_mem] = *data++;
      66                 :         }
      67               0 :         stream->in_mem += length;
      68               0 :         return CAIRO_STATUS_SUCCESS;
      69                 :     }
      70                 : 
      71                 :     do {
      72                 :         unsigned char dst[4];
      73                 : 
      74               0 :         for (i = stream->in_mem; i < 3; i++) {
      75               0 :             src[i] = *data++;
      76               0 :             length--;
      77                 :         }
      78               0 :         stream->in_mem = 0;
      79                 : 
      80               0 :         dst[0] = base64_table[src[0] >> 2];
      81               0 :         dst[1] = base64_table[(src[0] & 0x03) << 4 | src[1] >> 4];
      82               0 :         dst[2] = base64_table[(src[1] & 0x0f) << 2 | src[2] >> 6];
      83               0 :         dst[3] = base64_table[src[2] & 0xfc >> 2];
      84                 :         /* Special case for the last missing bits */
      85               0 :         switch (stream->trailing) {
      86                 :             case 2:
      87               0 :                 dst[2] = '=';
      88                 :             case 1:
      89               0 :                 dst[3] = '=';
      90                 :             default:
      91                 :                 break;
      92                 :         }
      93               0 :         _cairo_output_stream_write (stream->output, dst, 4);
      94               0 :     } while (length >= 3);
      95                 : 
      96               0 :     for (i = 0; i < length; i++) {
      97               0 :         src[i] = *data++;
      98                 :     }
      99               0 :     stream->in_mem = length;
     100                 : 
     101               0 :     return _cairo_output_stream_get_status (stream->output);
     102                 : }
     103                 : 
     104                 : static cairo_status_t
     105               0 : _cairo_base64_stream_close (cairo_output_stream_t *base)
     106                 : {
     107               0 :     cairo_base64_stream_t *stream = (cairo_base64_stream_t *) base;
     108               0 :     cairo_status_t status = CAIRO_STATUS_SUCCESS;
     109                 : 
     110               0 :     if (stream->in_mem > 0) {
     111               0 :         memset (stream->src + stream->in_mem, 0, 3 - stream->in_mem);
     112               0 :         stream->trailing = 3 - stream->in_mem;
     113               0 :         stream->in_mem = 3;
     114               0 :         status = _cairo_base64_stream_write (base, NULL, 0);
     115                 :     }
     116                 : 
     117               0 :     return status;
     118                 : }
     119                 : 
     120                 : cairo_output_stream_t *
     121               0 : _cairo_base64_stream_create (cairo_output_stream_t *output)
     122                 : {
     123                 :     cairo_base64_stream_t *stream;
     124                 : 
     125               0 :     if (output->status)
     126               0 :         return _cairo_output_stream_create_in_error (output->status);
     127                 : 
     128               0 :     stream = malloc (sizeof (cairo_base64_stream_t));
     129               0 :     if (unlikely (stream == NULL)) {
     130               0 :         _cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
     131               0 :         return (cairo_output_stream_t *) &_cairo_output_stream_nil;
     132                 :     }
     133                 : 
     134               0 :     _cairo_output_stream_init (&stream->base,
     135                 :                                _cairo_base64_stream_write,
     136                 :                                NULL,
     137                 :                                _cairo_base64_stream_close);
     138                 : 
     139               0 :     stream->output = output;
     140               0 :     stream->in_mem = 0;
     141               0 :     stream->trailing = 0;
     142                 : 
     143               0 :     return &stream->base;
     144                 : }

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