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/*
* SPDX-FileCopyrightText: 2023, Alejandro Colomar <alx@kernel.org>
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef SHADOW_INCLUDE_LIB_SPRINTF_H_
#define SHADOW_INCLUDE_LIB_SPRINTF_H_
#include <config.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdio.h>
#include "attr.h"
#include "defines.h"
#include "sizeof.h"
#define SNPRINTF(s, fmt, ...) \
snprintf_(s, NITEMS(s), fmt __VA_OPT__(,) __VA_ARGS__)
format_attr(printf, 2, 3)
inline int xasprintf(char **restrict s, const char *restrict fmt, ...);
format_attr(printf, 2, 0)
inline int xvasprintf(char **restrict s, const char *restrict fmt, va_list ap);
format_attr(printf, 3, 4)
inline int snprintf_(char *restrict s, size_t size, const char *restrict fmt,
...);
format_attr(printf, 3, 0)
inline int vsnprintf_(char *restrict s, size_t size, const char *restrict fmt,
va_list ap);
inline int
xasprintf(char **restrict s, const char *restrict fmt, ...)
{
int len;
va_list ap;
va_start(ap, fmt);
len = xvasprintf(s, fmt, ap);
va_end(ap);
return len;
}
inline int
xvasprintf(char **restrict s, const char *restrict fmt, va_list ap)
{
int len;
len = vasprintf(s, fmt, ap);
if (len == -1) {
perror("asprintf");
exit(EXIT_FAILURE);
}
return len;
}
inline int
snprintf_(char *restrict s, size_t size, const char *restrict fmt, ...)
{
int len;
va_list ap;
va_start(ap, fmt);
len = vsnprintf_(s, size, fmt, ap);
va_end(ap);
return len;
}
inline int
vsnprintf_(char *restrict s, size_t size, const char *restrict fmt, va_list ap)
{
int len;
len = vsnprintf(s, size, fmt, ap);
if (len == -1)
return -1;
if ((size_t) len >= size)
return -1;
return len;
}
#endif // include guard
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