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/* Check two strings for equality.
Copyright (C) 2018-2025 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
<https://www.gnu.org/licenses/>. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include <support/check.h>
#include <support/support.h>
#include <support/xmemstream.h>
static void
report_length (const char *what, const CHAR *str, size_t length)
{
if (str == NULL)
printf (" %s string: NULL\n", what);
else
printf (" %s string: %zu %s\n", what, length,
WIDE ? "wide characters" : "bytes");
}
static void
report_string (const char *what, const UCHAR *blob,
size_t length, const char *expr)
{
if (length > 0)
{
printf (" %s (evaluated from %s):\n", what, expr);
char *quoted = SUPPORT_QUOTE_BLOB (blob, length);
printf (" %s\"%s\"\n", LPREFIX, quoted);
free (quoted);
fputs (" ", stdout);
for (size_t i = 0; i < length; ++i)
printf (" %02X", (unsigned int) blob[i]);
putc ('\n', stdout);
}
}
static size_t
string_length_or_zero (const CHAR *str)
{
if (str == NULL)
return 0;
else
return STRLEN (str);
}
void
SUPPORT_TEST_COMPARE_STRING (const CHAR *left, const CHAR *right,
const char *file, int line,
const char *left_expr, const char *right_expr)
{
/* Two null pointers are accepted. */
if (left == NULL && right == NULL)
return;
size_t left_length = string_length_or_zero (left);
size_t right_length = string_length_or_zero (right);
if (left_length != right_length || left == NULL || right == NULL
|| MEMCMP (left, right, left_length) != 0)
{
support_record_failure ();
printf ("%s:%d: error: string comparison failed\n", file, line);
if (left_length == right_length && right != NULL && left != NULL)
printf (" string length: %zu %s\n", left_length,
WIDE ? "wide characters" : "bytes");
else
{
report_length ("left", left, left_length);
report_length ("right", right, right_length);
}
report_string ("left", (const UCHAR *) left,
left_length, left_expr);
report_string ("right", (const UCHAR *) right,
right_length, right_expr);
}
}
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