Grcov report - cairo-base85-stream.c

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/* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */

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/* cairo - a vector graphics library with display and print output

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 * Copyright © 2005 Red Hat, Inc

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 * This library is free software; you can redistribute it and/or

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 * modify it either under the terms of the GNU Lesser General Public

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 * License version 2.1 as published by the Free Software Foundation

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 * (the "LGPL") or, at your option, under the terms of the Mozilla

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 * Public License Version 1.1 (the "MPL"). If you do not alter this

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 * notice, a recipient may use your version of this file under either

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 * the MPL or the LGPL.

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 * You should have received a copy of the LGPL along with this library

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 * in the file COPYING-LGPL-2.1; if not, write to the Free Software

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 * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA

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 * You should have received a copy of the MPL along with this library

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 * in the file COPYING-MPL-1.1

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 * The contents of this file are subject to the Mozilla Public License

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 * Version 1.1 (the "License"); you may not use this file except in

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 * compliance with the License. You may obtain a copy of the License at

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 * http://www.mozilla.org/MPL/

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 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY

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 * OF ANY KIND, either express or implied. See the LGPL or the MPL for

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 * the specific language governing rights and limitations.

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 * The Original Code is the cairo graphics library.

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 * The Initial Developer of the Original Code is Red Hat, Inc.

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 * Author(s):

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 *	Kristian Høgsberg <krh@redhat.com>

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*/

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#include "cairoint.h"

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#include "cairo-error-private.h"

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#include "cairo-output-stream-private.h"

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typedef struct _cairo_base85_stream {

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    cairo_output_stream_t base;

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    cairo_output_stream_t *output;

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    unsigned char four_tuple[4];

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    int pending;

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} cairo_base85_stream_t;

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static void

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7364

_expand_four_tuple_to_five (unsigned char four_tuple[4],

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			    unsigned char five_tuple[5],

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			    cairo_bool_t *all_zero)

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    uint32_t value;

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    int digit, i;

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7364

    value = (uint32_t)four_tuple[0] << 24 | four_tuple[1] << 16 | four_tuple[2] << 8 | four_tuple[3];

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    if (all_zero)

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	*all_zero = TRUE;

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    for (i = 0; i < 5; i++) {

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36820

	digit = value % 85;

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	if (digit != 0 && all_zero)

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	    *all_zero = FALSE;

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	five_tuple[4-i] = digit + 33;

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	value = value / 85;

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7364

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static cairo_status_t

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_cairo_base85_stream_write (cairo_output_stream_t *base,

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			    const unsigned char	  *data,

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			    unsigned int	   length)

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    cairo_base85_stream_t *stream = (cairo_base85_stream_t *) base;

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    const unsigned char *ptr = data;

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    unsigned char five_tuple[5];

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    cairo_bool_t is_zero;

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    while (length) {

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	stream->four_tuple[stream->pending++] = *ptr++;

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	length--;

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	if (stream->pending == 4) {

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	    _expand_four_tuple_to_five (stream->four_tuple, five_tuple, &is_zero);

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	    if (is_zero)

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		_cairo_output_stream_write (stream->output, "z", 1);

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	    else

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		_cairo_output_stream_write (stream->output, five_tuple, 5);

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	    stream->pending = 0;

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    return _cairo_output_stream_get_status (stream->output);

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static cairo_status_t

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_cairo_base85_stream_close (cairo_output_stream_t *base)

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    cairo_base85_stream_t *stream = (cairo_base85_stream_t *) base;

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    unsigned char five_tuple[5];

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    if (stream->pending) {

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	memset (stream->four_tuple + stream->pending, 0, 4 - stream->pending);

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	_expand_four_tuple_to_five (stream->four_tuple, five_tuple, NULL);

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	_cairo_output_stream_write (stream->output, five_tuple, stream->pending + 1);

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    return _cairo_output_stream_get_status (stream->output);

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cairo_output_stream_t *

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_cairo_base85_stream_create (cairo_output_stream_t *output)

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    cairo_base85_stream_t *stream;

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    if (output->status)

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	return _cairo_output_stream_create_in_error (output->status);

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    stream = _cairo_calloc (sizeof (cairo_base85_stream_t));

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    if (unlikely (stream == NULL)) {

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	_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);

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	return (cairo_output_stream_t *) &_cairo_output_stream_nil;

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    _cairo_output_stream_init (&stream->base,

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			       _cairo_base85_stream_write,

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			       NULL,

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			       _cairo_base85_stream_close);

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    stream->output = output;

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    stream->pending = 0;

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    return &stream->base;

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