1/* Copyright (C) 1995, 1997 Free Software Foundation, Inc. 2 This file is part of the GNU IO Library. 3 4 This library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU General Public License as 6 published by the Free Software Foundation; either version 2, or (at 7 your option) any later version. 8 9 This library is distributed in the hope that it will be useful, but 10 WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this library; see the file COPYING. If not, write to 16 the Free Software Foundation, 59 Temple Place - Suite 330, Boston, 17 MA 02111-1307, USA. 18 19 As a special exception, if you link this library with files 20 compiled with a GNU compiler to produce an executable, this does 21 not cause the resulting executable to be covered by the GNU General 22 Public License. This exception does not however invalidate any 23 other reasons why the executable file might be covered by the GNU 24 General Public License. */ 25 26#include <malloc.h> 27#include "libioP.h" 28#include "stdio.h" 29#include "strfile.h" 30 31int 32_IO_vasprintf (result_ptr, format, args) 33 char **result_ptr; 34 const char *format; 35 _IO_va_list args; 36{ 37 /* Initial size of the buffer to be used. Will be doubled each time an 38 overflow occurs. */ 39 const _IO_size_t init_string_size = 100; 40 char *string; 41 _IO_strfile sf; 42#ifdef _IO_MTSAFE_IO 43 _IO_lock_t lock; 44#endif 45 int ret; 46 string = (char *) malloc (init_string_size); 47 if (string == NULL) 48 return -1; 49#ifdef _IO_MTSAFE_IO 50 sf._sbf._f._lock = &lock; 51#endif 52 _IO_init ((_IO_FILE *) &sf, 0); 53 _IO_JUMPS ((_IO_FILE *) &sf) = &_IO_str_jumps; 54 _IO_str_init_static ((_IO_FILE *) &sf, string, init_string_size, string); 55 sf._sbf._f._flags &= ~_IO_USER_BUF; 56 sf._s._allocate_buffer = (_IO_alloc_type) malloc; 57 sf._s._free_buffer = (_IO_free_type) free; 58 ret = _IO_vfprintf ((_IO_FILE *) &sf, format, args); 59 if (ret < 0) 60 return ret; 61 *result_ptr = (char *) realloc (sf._sbf._f._IO_buf_base, 62 (sf._sbf._f._IO_write_ptr 63 - sf._sbf._f._IO_write_base) +1); 64 if (*result_ptr == NULL) 65 *result_ptr = sf._sbf._f._IO_buf_base; 66 (*result_ptr)[sf._sbf._f._IO_write_ptr-sf._sbf._f._IO_write_base] = '\0'; 67 return ret; 68} 69 70#ifdef weak_alias 71weak_alias (_IO_vasprintf, vasprintf) 72#endif 73