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/*
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright © 2024, Synopsys Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#define __STDC_WANT_LIB_EXT1__ 1
#include <string.h>
#include <stdbool.h>
#include <errno.h>
#include "string_private.h"
/* C11 version; required by LLVM's C++11 library */
__errno_t
strerror_s(char *buf, rsize_t buflen, __errno_t errnum)
{
int32_t result = 0;
const char *msg = "";
if (buf == NULL) {
msg = "strerror_s: dest is NULL";
goto handle_error;
}
if ((buflen == 0u) || (CHECK_RSIZE(buflen))) {
msg = "strerror_s: dest buffer size is 0 or exceeds RSIZE_MAX";
goto handle_error;
}
const char *cp = _strerror_r(errnum, 0, NULL);
uint32_t len = strnlen_s(cp, MAX_ERROR_MSG);
if (len < buflen) {
(void)strncpy(buf, cp, MAX_ERROR_MSG);
} else {
/* Standard allows truncation of error message with '...' to
indicate truncation. */
(void)memcpy(buf, cp, (buflen - 1u));
buf[(buflen - 1u)] = '\0';
if (buflen > 3u) {
(void)strncpy(&buf[(buflen - 4u)], "...", 4u);
}
result = ERANGE;
}
// Normal return path
return result;
handle_error:
if (__cur_handler != NULL) {
__cur_handler(msg, NULL, -1);
}
return -1;
}
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