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

   userprintf.c
   qh_fprintf()

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

   If you recompile and load this file, then userprintf.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">-</a>

   qh_fprintf(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 via qh_errexit()
*/

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

    if (!fp) {
        fprintf(stderr, "QH6232 Qhull internal error (userprintf.c): fp is 0.  Wrong qh_fprintf called.\n");
        qh_errexit(6232, NULL, NULL);
    }
    va_start(args, fmt);
#if qh_QHpointer
    if (qh_qh && qh ANNOTATEoutput)
#else
    if (qh ANNOTATEoutput)
#endif
    {
      fprintf(fp, "[QH%.4d]", msgcode);
    }else if (msgcode >= MSG_ERROR && msgcode < MSG_STDERR ) {
      fprintf(fp, "QH%.4d ", msgcode);
    }
    vfprintf(fp, fmt, args);
    va_end(args);

    /* Place debugging traps here. Use with option 'Tn' */

} /* qh_fprintf */

