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// Copyright 2022 Alejandro Colomar <alx@kernel.org>
// SPDX-License-Identifier: LGPL-3.0-or-later WITH LGPL-3.0-linking-exception
#ifndef INCLUDE_C_STR_CPY_STP_STPE_STPEPRINTF_H_
#define INCLUDE_C_STR_CPY_STP_STPE_STPEPRINTF_H_
#include <stdarg.h>
#include <stdio.h>
#include <c/str/cpy/stp/_compiler.h>
#pragma clang assume_nonnull begin
inline char *c_nullable c_stpeprintf(char *c_nullable dst, char *end,
const char *restrict fmt, ...);
inline char *c_nullable c_vstpeprintf(char *c_nullable dst, char *end,
const char *restrict fmt, va_list ap);
inline char *c_nullable
c_stpeprintf(char *c_nullable dst, char *end, const char *restrict fmt, ...)
{
char *c_nullable p;
va_list ap;
va_start(ap, fmt);
p = c_vstpeprintf(dst, end, fmt, ap);
va_end(ap);
return p;
}
inline char *c_nullable
c_vstpeprintf(char *c_nullable dst, char *end, const char *restrict fmt,
va_list ap)
{
int len;
if (dst == end)
return end;
if (c_unlikely(dst == NULL))
return NULL;
c_impossible(dst > end);
len = vsnprintf(dst, end - dst, fmt, ap);
c_impossible(len < -1);
if (c_unlikely(len == -1))
return NULL;
if (len >= end - dst)
return end;
return dst + len;
}
#pragma clang assume_nonnull end
#endif // Header guard
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