Grcov report - create-from-broken-png-stream.c

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/*

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 * Copyright © 2017 Uli Schlachter

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 * Permission to use, copy, modify, distribute, and sell this software

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 * and its documentation for any purpose is hereby granted without

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 * fee, provided that the above copyright notice appear in all copies

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 * and that both that copyright notice and this permission notice

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 * appear in supporting documentation, and that the name of

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 * Red Hat, Inc. not be used in advertising or publicity pertaining to

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 * distribution of the software without specific, written prior

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 * permission. Red Hat, Inc. makes no representations about the

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 * suitability of this software for any purpose.  It is provided "as

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 * is" without express or implied warranty.

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 * RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS

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 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND

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 * FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,

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 * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER

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 * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION

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 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR

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 * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

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 * Author: Uli Schlachter <psychon@znc.in>

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*/

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#include "cairo-test.h"

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#include <stdlib.h>

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static const unsigned char broken_png_data[] = {

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  0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a, 0x00, 0x00, 0x00, 0x0d,

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  0x49, 0x48, 0x44, 0x52, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x02,

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  0x08, 0x02, 0x00, 0x00, 0x00, 0xfd, 0xd4, 0x9a, 0xff, 0x00, 0x00, 0x00,

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};

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static const size_t broken_png_data_length

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    = sizeof(broken_png_data) / sizeof(broken_png_data[0]);

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static cairo_status_t

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read_png_from_data (void *closure, unsigned char *data, unsigned int length)

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    size_t *offset = closure;

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    size_t remaining = broken_png_data_length - *offset;

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    if (remaining < length)

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	return CAIRO_STATUS_READ_ERROR;

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    memcpy (data, &broken_png_data[*offset], length);

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    *offset += length;

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    return CAIRO_STATUS_SUCCESS;

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static cairo_test_status_t

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preamble (cairo_test_context_t *ctx)

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    cairo_surface_t *surface;

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    cairo_status_t status;

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    cairo_status_t expected;

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    size_t offset = 0;

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    surface = cairo_image_surface_create_from_png_stream (read_png_from_data,

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							  &offset);

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    expected = CAIRO_STATUS_PNG_ERROR;

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    status = cairo_surface_status (surface);

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    cairo_surface_destroy (surface);

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    if (status != expected) {

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	cairo_test_log (ctx,

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			"Error: expected error %s, but got %s\n",

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			cairo_status_to_string (expected),

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			cairo_status_to_string (status));

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	return CAIRO_TEST_FAILURE;

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    return CAIRO_TEST_SUCCESS;

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CAIRO_TEST (create_from_broken_png_stream,

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	    "Tests the creation of a PNG from malformed data",

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	    "png", /* keywords */

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	    NULL, /* requirements */

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	    0, 0,

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	    preamble, NULL)