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/***************************************************************************
*cr
*cr (C) Copyright 2009 The Board of Trustees of the
*cr University of Illinois
*cr All Rights Reserved
*cr
***************************************************************************/
/***************************************************************************
* RCS INFORMATION:
*
* $RCSfile: vmdconio.h,v $
* $Author: johns $ $Locker: $ $State: Exp $
* $Revision: 1.4 $ $Date: 2015/10/11 22:36:27 $
*
***************************************************************************/
/** @file
* APIs for console output management. The calling application may
* optionally provide callback routines for console output that direct
* output to GUI consoles and other places besides stdout.
*/
#ifndef VMDCON_PLUGIN_H
#define VMDCON_PLUGIN_H
/* this has to correspond to vmdconsole.h */
#define VMDCON_ALL 0 /**< "print all messages" log level */
#define VMDCON_INFO 1 /**< informational messages log level */
#define VMDCON_WARN 2 /**< warning messages" log level */
#define VMDCON_ERROR 3 /**< error messages log level */
#define VMDCON_ALWAYS 4 /**< print always log level */
#define VMDCON_LOG 5 /**< store only in syslog log level */
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#ifdef __cplusplus
extern "C" {
#endif
/* set default */
#if !defined(THISPLUGIN)
#define THISPLUGIN plugin
#endif
/* forward declaration */
static molfile_plugin_t THISPLUGIN;
/*
* Emulate printf. unfortunately, we cannot rely on
* snprintf being available, so we have to write to
* a very large buffer and then free it. :-(
*/
static int vmdcon_printf(int lvl, const char *fmt, ...) {
va_list ap;
char *buf;
int len;
/* expand formatted output into a single string */
buf = (char *)malloc(MOLFILE_BIGBUFSIZ);
va_start(ap, fmt);
len = vsprintf(buf, fmt, ap);
/*
* Check result. we may get a segfault, but if not
* let the user know that he/she is in trouble.
*/
if (len >= MOLFILE_BIGBUFSIZ) {
fprintf(stderr,"WARNING! buffer overflow in vmdcon_printf. %d vs %d.\n",
len, MOLFILE_BIGBUFSIZ);
free(buf);
#if 0
errno=ERANGE; /* this is inherently thread-unsafe */
#endif
return -1;
}
/*
* write to registered console output function.
* fall back to stdout, if vmdcon not available.
*/
if (THISPLUGIN.cons_fputs) {
(*THISPLUGIN.cons_fputs)(lvl, buf);
} else {
fputs(buf, stdout);
}
free(buf);
return 0;
}
#ifdef __cplusplus
}
#endif
#endif /* VMDCON_PLUGIN_H */
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