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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2025 Chelsio Communications, Inc.
* Written by: John Baldwin <jhb@FreeBSD.org>
*/
#include <cstdarg>
#include <cstdio>
#include <string>
#include "libutil++.hh"
static int
stringf_write(void *cookie, const char *buf, int len)
{
std::string *str = reinterpret_cast<std::string *>(cookie);
try {
str->append(buf, len);
} catch (std::bad_alloc) {
errno = ENOMEM;
return (-1);
} catch (std::length_error) {
errno = EFBIG;
return (-1);
}
return (len);
}
std::string
freebsd::stringf(const char *fmt, va_list ap)
{
std::string str;
freebsd::FILE_up fp(fwopen(reinterpret_cast<void *>(&str),
stringf_write));
vfprintf(fp.get(), fmt, ap);
if (ferror(fp.get()))
throw std::bad_alloc();
fp.reset(nullptr);
return str;
}
std::string
freebsd::stringf(const char *fmt, ...)
{
std::va_list ap;
std::string str;
va_start(ap, fmt);
str = freebsd::stringf(fmt, ap);
va_end(ap);
return str;
}
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