mirror of https://github.com/dzavalishin/oskit/
119 lines
2.5 KiB
C
119 lines
2.5 KiB
C
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/*
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* Copyright (c) 1998-2001 The University of Utah and the Flux Group.
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* All rights reserved.
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*
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* This file is part of the Flux OSKit. The OSKit is free software, also known
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* as "open source;" you can redistribute it and/or modify it under the terms
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* of the GNU General Public License (GPL), version 2, as published by the Free
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* Software Foundation (FSF). To explore alternate licensing terms, contact
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* the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
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*
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* The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GPL for more details. You should have
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* received a copy of the GPL along with the OSKit; see the file COPYING. If
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* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
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*/
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#include <stdio.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#include <oskit/tmcp.h>
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#include "tmcp.h"
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#define LOGCMDLEN 4
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#define TMCDBUFSIZE 1024
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#define LOGBUFLEN (TMCDBUFSIZE-LOGCMDLEN-1)
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static char logcmd[] = "log ";
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static char logbuf[LOGBUFLEN];
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static char *logbp = logbuf;
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static int logbufwrapped = 0;
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void
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tmcp_log(const char *fmt, ...)
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{
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va_list args;
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va_start(args, fmt);
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tmcp_vlog(fmt, args);
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va_end(args);
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}
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void
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tmcp_vlog(const char *fmt, va_list args)
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{
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char buf[LOGBUFLEN], *bp;
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int blen, n;
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vsnprintf(buf, LOGBUFLEN, fmt, args);
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bp = buf;
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blen = strlen(buf);
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/*
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* Fill from current buffer offset to end of data or end of buffer
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*/
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n = (logbuf + LOGBUFLEN) - logbp;
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if (n > blen)
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n = blen;
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assert(n > 0);
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memcpy(logbp, bp, n);
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/*
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* Advance the buffer and check for wrap
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*/
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logbp += n;
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if (logbp == logbuf + LOGBUFLEN) {
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logbp = logbuf;
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logbufwrapped = 1;
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}
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/*
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* If more to write, fill from beginning of buffer
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*/
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if (blen > n) {
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bp += n;
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blen -= n;
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assert(logbp == logbuf);
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memcpy(logbp, bp, blen);
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logbp += blen;
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}
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assert(logbp < logbuf + LOGBUFLEN);
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}
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/*
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* Linearize the data from the circular log buffer, null terminate it,
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* and send it off.
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*/
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int
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tmcp_logdump(void)
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{
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int len, err;
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char buf[TMCDBUFSIZE], *bp;
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if (logbp == logbuf && !logbufwrapped)
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return 0;
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bp = buf;
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memcpy(bp, logcmd, LOGCMDLEN);
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bp += LOGCMDLEN;
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if (logbufwrapped) {
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len = (logbuf + LOGBUFLEN) - logbp;
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memcpy(bp, logbp, len);
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bp += len;
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}
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len = logbp - logbuf;
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memcpy(bp, logbuf, len);
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bp += len;
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*bp = 0;
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len = 0;
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err = tmcp_sendmsg(buf, &len);
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return err;
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}
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