glui_string.cpp
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上传日期:2022-01-07
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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 "GL/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;
- }