userprintf_rbox.c
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	/*<html><pre> -<a href="qh-user.htm"
	>-------------------------------</a><a name="TOP">-</a>

	userprintf_rbox.c
	qh_fprintf_rbox()

	see README.txt see COPYING.txt for copyright information.

	If you recompile and load this file, then userprintf_rbox.o will not be loaded
	from qhull.a or qhull.lib

	See libqhull.h for data structures, macros, and user-callable functions.
	See user.c for qhull-related, redefinable functions
	see user.h for user-definable constants
	See usermem.c for qh_exit(), qh_free(), and qh_malloc()
	see Qhull.cpp and RboxPoints.cpp for examples.

	Please report any errors that you fix to qhull@qhull.org
	*/

	#include "libqhull.h"

	#include <stdarg.h>
	#include <stdio.h>
	#include <stdlib.h>

	/*-<a href="qh-user.htm#TOC"
	>-------------------------------</a><a name="qh_fprintf_rbox">-</a>

	qh_fprintf_rbox(fp, msgcode, format, list of args )
	print arguments to *fp according to format
	Use qh_fprintf_rbox() for rboxlib.c

	notes:
	same as fprintf()
	fgets() is not trapped like fprintf()
	exit qh_fprintf_rbox via qh_errexit_rbox()
	*/

	void qh_fprintf_rbox(FILE fp, int msgcode, const char fmt, ... ) {
	va_list args;

	if (!fp) {
	qh_fprintf_stderr(6231, "Qhull internal error (userprintf_rbox.c): fp is 0. Wrong qh_fprintf_rbox called.\n");
	qh_errexit_rbox(6231);
	}
	if (msgcode >= MSG_ERROR && msgcode < MSG_STDERR)
	fprintf(fp, "QH%.4d ", msgcode);
	va_start(args, fmt);
	vfprintf(fp, fmt, args);
	va_end(args);
	} /* qh_fprintf_rbox */