mirror of
https://git.freebsd.org/src.git
synced 2026-01-16 23:02:24 +00:00
b3127a2dc2
- freebsd::FILE_up is a wrapper class for std::unique_ptr<> for FILE objects which uses a custom deleter that calls fclose(). - freebsd::malloc_up<T> is a wrapper class for std::unique_ptr<> which uses a custom deleter that calls free(). It is useful for pointers allocated by malloc() such as strdup(). - The freebsd::stringf() functions return a std::string constructed using a printf format string. The current implementation of freebsd::stringf() uses fwopen() where the write function appends to a std::string. Sponsored by: Chelsio Communications Pull Request: https://github.com/freebsd/freebsd-src/pull/1794
57 lines
987 B
C++
57 lines
987 B
C++
/*-
|
|
* 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;
|
|
}
|