00001 // Copyright 2006 Benedikt Böhm <hollow@gentoo.org> 00002 // 00003 // This program is free software; you can redistribute it and/or modify 00004 // it under the terms of the GNU General Public License as published by 00005 // the Free Software Foundation; either version 2 of the License, or 00006 // (at your option) any later version. 00007 // 00008 // This program is distributed in the hope that it will be useful, 00009 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00010 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00011 // GNU General Public License for more details. 00012 // 00013 // You should have received a copy of the GNU General Public License 00014 // along with this program; if not, write to the 00015 // Free Software Foundation, Inc., 00016 // 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 00017 00018 #include <stdlib.h> 00019 00020 #include "printf.h" 00021 00022 int _lucid_vasprintf(char **ptr, const char *fmt, va_list ap) 00023 { 00024 va_list ap2; 00025 int len; 00026 char *buf; 00027 00028 /* don't consume the original ap, we'll need it again */ 00029 va_copy(ap2, ap); 00030 00031 /* get required size */ 00032 len = _lucid_vsnprintf(0, 0, fmt, ap2); 00033 00034 va_end(ap2); 00035 00036 /* if size is 0, no buffer is allocated 00037 ** just set *ptr to NULL and return size */ 00038 if (len > 0) { 00039 if (!(buf = calloc(len + 1, sizeof(char)))) 00040 return -1; 00041 00042 _lucid_vsnprintf(buf, len, fmt, ap); 00043 00044 *ptr = buf; 00045 } 00046 00047 return len; 00048 }