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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
55 lines
1.2 KiB
C++
55 lines
1.2 KiB
C++
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2025 Chelsio Communications, Inc.
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* Written by: John Baldwin <jhb@FreeBSD.org>
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*/
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#ifndef __LIBUTILPP_HH__
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#define __LIBUTILPP_HH__
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#include <cstdarg>
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#include <cstdio>
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#include <cstdlib>
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#include <memory>
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namespace freebsd {
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/*
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* FILE_up is a std::unique_ptr<> for FILE objects which uses
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* fclose() to destroy the wrapped pointer.
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*/
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struct fclose_deleter {
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void operator() (std::FILE *fp) const
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{
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std::fclose(fp);
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}
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};
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using FILE_up = std::unique_ptr<std::FILE, fclose_deleter>;
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/*
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* malloc_up<T> is a std::unique_ptr<> which uses free() to
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* destroy the wrapped pointer. This can be used to wrap
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* pointers allocated implicitly by malloc() such as those
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* returned by strdup().
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*/
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template <class T>
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struct free_deleter {
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void operator() (T *p) const
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{
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std::free(p);
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}
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};
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template <class T>
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using malloc_up = std::unique_ptr<T, free_deleter<T>>;
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/*
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* Returns a std::string containing the same output as
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* sprintf(). Throws std::bad_alloc if an error occurs.
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*/
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std::string stringf(const char *fmt, ...) __printflike(1, 2);
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std::string stringf(const char *fmt, std::va_list ap);
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}
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#endif /* !__LIBUTILPP_HH__ */
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