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f8c28f094d
* gettext-runtime/libasprintf/autosprintf.cc: Include <config.h>. This is needed because of these new gnulib module dependencies: vasnprintf -> free-posix -> stdlib -> unistd, and the generated unistd.h gets included indirectly by <string> on OpenBSD 6.7 and gives a #error "Please include config.h first."
90 lines
2.5 KiB
C++
90 lines
2.5 KiB
C++
/* Class autosprintf - formatted output to an ostream.
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Copyright (C) 2002, 2013, 2015, 2018, 2021 Free Software Foundation, Inc.
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Written by Bruno Haible <bruno@clisp.org>, 2002.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#include <config.h>
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/* Specification. */
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#include "autosprintf.h"
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#include <stdarg.h>
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#include <stdlib.h>
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#include <string.h>
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/* std::swap() is in <utility> since C++11. */
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#if __cplusplus >= 201103L
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# include <utility>
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#else
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# include <algorithm>
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#endif
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/* This include must come last, since it contains overrides of functions that
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the system may provide (namely, vasprintf). */
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#include "lib-asprintf.h"
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namespace gnu
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{
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/* Constructor: takes a format string and the printf arguments. */
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autosprintf::autosprintf (const char *format, ...)
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{
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va_list args;
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va_start (args, format);
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if (vasprintf (&str, format, args) < 0)
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str = NULL;
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va_end (args);
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}
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/* Copy constructor. Necessary because the destructor is nontrivial. */
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autosprintf::autosprintf (const autosprintf& src)
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{
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str = (src.str != NULL ? strdup (src.str) : NULL);
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}
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/* Assignment operator. Necessary because the destructor is nontrivial. */
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autosprintf& autosprintf::operator = (autosprintf temporary)
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{
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/* Copy-and-swap idiom.
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See https://stackoverflow.com/questions/3279543/what-is-the-copy-and-swap-idiom */
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std::swap (temporary.str, this->str);
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return *this;
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}
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/* Destructor: frees the temporarily allocated string. */
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autosprintf::~autosprintf ()
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{
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free (str);
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}
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/* Conversion to string. */
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autosprintf::operator char * () const
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{
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if (str != NULL)
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{
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size_t length = strlen (str) + 1;
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char *copy = new char[length];
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memcpy (copy, str, length);
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return copy;
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}
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else
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return NULL;
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}
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autosprintf::operator std::string () const
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{
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return std::string (str ? str : "(error in autosprintf)");
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}
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}
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