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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 "stdio_private.h"
#include <stdio.h>
#include <stddef.h>
#include <stdbool.h>
#include "../stdlib/local_s.h"
int
vsnprintf_s(char * __restrict s, rsize_t n, const char * __restrict fmt, va_list arg)
{
bool write_null = true;
const char *msg = "";
int rc;
if (s == NULL) {
write_null = false;
msg = "dest buffer is null";
goto handle_error;
} else if ((n == 0) || (CHECK_RSIZE(n))) {
write_null = false;
msg = "invalid buffer size";
goto handle_error;
} else if (fmt == NULL) {
msg = "null format string";
goto handle_error;
} else {
struct __file_str f = FDEV_SETUP_STRING_WRITE(s, FDEV_STRING_WRITE_END(s, n));
rc = vfprintf_s(&f.file, fmt, arg);
if (n) {
*f.pos = '\0';
}
}
if (rc < 0) {
msg = "output error";
goto handle_error;
} else if (rc > INT_MAX) {
msg = "output size exceeds max limit";
goto handle_error;
} else if ((unsigned int)rc >= n) {
msg = "dest buffer overflow";
goto handle_error;
} else {
s[rc] = '\0';
}
// Normal return path
return rc;
handle_error:
if (__cur_handler != NULL) {
__cur_handler(msg, NULL, -1);
}
rc = -1;
if (write_null && s != NULL && n > 0) {
s[0] = '\0'; /* again, standard requires this */
}
return rc;
}
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