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79 lines
2.2 KiB
C++
79 lines
2.2 KiB
C++
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/* Class autosprintf - formatted output to an ostream.
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Copyright (C) 2002 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 it
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under the terms of the GNU Library General Public License as published
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by the Free Software Foundation; either version 2, or (at your option)
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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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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USA. */
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/* Tell glibc's <stdio.h> to provide a prototype for vasprintf().
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This must come before <config.h> because <config.h> may include
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<features.h>, and once <features.h> has been included, it's too late. */
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#ifndef _GNU_SOURCE
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# define _GNU_SOURCE 1
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#endif
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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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//#include "lib-asprintf.h"
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#include <stdio.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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/* 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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