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/****************************************************************************
GLUI User Interface Toolkit
---------------------------
glui.cpp
--------------------------------------------------
Copyright (c) 1998 Paul Rademacher (this file, Bill Baxter 2005)
This library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
This 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA
This program is -not- in the public domain.
*****************************************************************************/
#include "glui.h"
#include <stdarg.h>
#ifdef _MSC_VER
#define vsnprintf _vsnprintf
#endif
GLUI_String& glui_format_str(GLUI_String& str, const char* fmt, ...)
{
const size_t ISIZE = 128;
char stackbuf[ISIZE];
size_t bufsz = ISIZE;
char *buf = stackbuf;
str = "";
va_list arg;
while (1) {
va_start(arg, fmt);
int ret = vsnprintf(buf,299,fmt,arg);
va_end(arg);
if (ret>=0) {
break;
}
// else make a bigger buf, try again
bufsz <<= 1;
if (buf==stackbuf) buf = (char*)malloc(sizeof(char)*bufsz);
else buf = (char*)realloc(buf, sizeof(char)*bufsz);
}
if (buf!=stackbuf) free(buf);
str=buf;
return str;
}