forgot to svn add this one: logging functions for varnishtest

git-svn-id: http://www.varnish-cache.org/svn/trunk@2742 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishtest/vtc_log.c

+/*
+ * Copyright (c) 2006-2008 Linpro AS
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $Id$
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <err.h>
+#include <pthread.h>
+#include <stdarg.h>
+
+#include "libvarnish.h"
+#include "vsb.h"
+#include "miniobj.h"
+
+#include "vtc.h"
+
+int vtc_verbosity = 3;
+
+struct vtclog {
+	unsigned	magic;
+#define VTCLOG_MAGIC	0x82731202
+	const char	*id;
+	struct vsb	*vsb;
+};
+
+struct vtclog *
+vtc_logopen(const char *id)
+{
+	struct vtclog *vl;
+
+	ALLOC_OBJ(vl, VTCLOG_MAGIC);
+	AN(vl);	
+	vl->id = id;
+	vl->vsb = vsb_newauto();
+	return (vl);
+}
+
+static const char *lead[] = {
+	"----",
+	"#   ",
+	"##  ",
+	"### ",
+	"####"
+};
+
+#define NLEAD (sizeof(lead)/sizeof(lead[0]))
+
+void
+vtc_log(struct vtclog *vl, unsigned lvl, const char *fmt, ...)
+{
+
+	assert(lvl < NLEAD);
+	if (lvl > vtc_verbosity)
+		return;
+	vsb_printf(vl->vsb, "%s %-4s ", lead[lvl], vl->id);
+	va_list ap;
+	va_start(ap, fmt);
+	(void)vsb_vprintf(vl->vsb, fmt, ap);
+	va_end(ap);
+	vsb_putc(vl->vsb, '\n');
+	vsb_finish(vl->vsb);
+	AZ(vsb_overflowed(vl->vsb));
+	(void)fputs(vsb_data(vl->vsb), stdout);
+	vsb_clear(vl->vsb);
+	if (lvl == 0)
+		exit (1);
+}
+
+/**********************************************************************
+ * Dump a string
+ */
+
+void
+vtc_dump(struct vtclog *vl, unsigned lvl, const char *pfx, const char *str)
+{
+	int nl = 1;
+
+	assert(lvl < NLEAD);
+	if (lvl > vtc_verbosity)
+		return;
+	if (pfx == NULL)
+		pfx = "";
+	if (str == NULL) 
+		vsb_printf(vl->vsb, "%s %-4s %s(null)\n",
+		    lead[lvl], vl->id, pfx);
+	else
+		for(; *str; str++) {
+			if (nl) {
+				vsb_printf(vl->vsb, "%s %-4s %s| ",
+				    lead[lvl], vl->id, pfx);
+				nl = 0;
+			}
+			if (*str == '\r')
+				vsb_printf(vl->vsb, "\\r");
+			else if (*str == '\t')
+				vsb_printf(vl->vsb, "\\t");
+			else if (*str == '\n') {
+				vsb_printf(vl->vsb, "\\n\n");
+				nl = 1;
+			} else if (*str < 0x20 || *str > 0x7e)
+				vsb_printf(vl->vsb, "\\x%02x", *str);
+			else
+				vsb_printf(vl->vsb, "%c", *str);
+		}
+	if (!nl)
+		vsb_printf(vl->vsb, "\n");
+	vsb_finish(vl->vsb);
+	AZ(vsb_overflowed(vl->vsb));
+	(void)fputs(vsb_data(vl->vsb), stdout);
+	vsb_clear(vl->vsb);
+	if (lvl == 0)
+		exit (1);
+}