/* Copyright (C) 1991, 1992, 1997 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include <stddef.h> #include <stdarg.h> #include <stdio.h> #include <stdlib.h> #include <string.h> /* Enlarge STREAM's buffer. */ static void enlarge_buffer (FILE *stream, int c) { ptrdiff_t bufp_offset = stream->__bufp - stream->__buffer; char *newbuf; stream->__bufsize += 100; newbuf = (char *) realloc ((void *) stream->__buffer, stream->__bufsize); if (newbuf == NULL) { free ((void *) stream->__buffer); stream->__buffer = stream->__bufp = stream->__put_limit = stream->__get_limit = NULL; stream->__error = 1; } else { stream->__buffer = newbuf; stream->__bufp = stream->__buffer + bufp_offset; stream->__get_limit = stream->__put_limit; stream->__put_limit = stream->__buffer + stream->__bufsize; if (c != EOF) *stream->__bufp++ = (unsigned char) c; } } /* Write formatted output from FORMAT to a string which is allocated with malloc and stored in *STRING_PTR. */ int vasprintf (char **string_ptr, const char *format, va_list args) { FILE f; int done; memset ((void *) &f, 0, sizeof (f)); f.__magic = _IOMAGIC; f.__bufsize = 100; f.__buffer = (char *) malloc (f.__bufsize); if (f.__buffer == NULL) return -1; f.__bufp = f.__buffer; f.__put_limit = f.__buffer + f.__bufsize; f.__mode.__write = 1; f.__room_funcs.__output = enlarge_buffer; f.__seen = 1; done = vfprintf (&f, format, args); if (done < 0) return done; *string_ptr = realloc (f.__buffer, (f.__bufp - f.__buffer) + 1); if (*string_ptr == NULL) *string_ptr = f.__buffer; (*string_ptr)[f.__bufp - f.__buffer] = '\0'; return done; }