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