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support: Add TEST_COMPARE_BLOB, support_quote_blob

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The declaration of support_test_compare_blob uses unsigned long int,
to avoid including <stddef.h>.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Florian Weimer
2018-05-16 17:00:35 +02:00
parent 9761bf4dfa
commit 2afece36f6
8 changed files with 390 additions and 0 deletions
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76
support/support_test_compare_blob.c Normal file
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/* Check two binary blobs for equality.
Copyright (C) 2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <support/check.h>
#include <support/support.h>
#include <support/xmemstream.h>
static void
report_length (const char *what, unsigned long int length, const char *expr)
{
printf (" %s %lu bytes (from %s)\n", what, length, expr);
}
static void
report_blob (const char *what, const unsigned char *blob,
unsigned long int length, const char *expr)
{
if (length > 0)
{
printf (" %s (evaluated from %s):\n", what, expr);
char *quoted = support_quote_blob (blob, length);
printf (" \"%s\"\n", quoted);
free (quoted);
fputs (" ", stdout);
for (unsigned long i = 0; i < length; ++i)
printf (" %02X", blob[i]);
putc ('\n', stdout);
}
}
void
support_test_compare_blob (const void *left, unsigned long int left_length,
const void *right, unsigned long int right_length,
const char *file, int line,
const char *left_expr, const char *left_len_expr,
const char *right_expr, const char *right_len_expr)
{
/* No differences are possible if both lengths are null. */
if (left_length == 0 && right_length == 0)
return;
if (left_length != right_length || left == NULL || right == NULL
|| memcmp (left, right, left_length) != 0)
{
support_record_failure ();
printf ("%s:%d: error: blob comparison failed\n", file, line);
if (left_length == right_length)
printf (" blob length: %lu bytes\n", left_length);
else
{
report_length ("left length: ", left_length, left_len_expr);
report_length ("right length:", right_length, right_len_expr);
}
report_blob ("left", left, left_length, left_expr);
report_blob ("right", right, right_length, right_expr);
}
}