/* GStreamer
 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
 *                    2000 Wim Taymans <wtay@chello.be>
 *
 * gsttrace.c: Tracing functions (depracated)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */


#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>

#include "gst_private.h"

#include "gstlog.h"
#include "gsttrace.h"

static __inline__ void
read_tsc (guint64 * dst)
{
#ifdef HAVE_RDTSC
  guint64 tsc;
  __asm__ __volatile__ ("rdtsc":"=A" (tsc));

  *dst = tsc;
#else
  *dst = 0;
#endif
}

void
gst_trace_read_tsc (guint64 * dst)
{
  read_tsc (dst);
}

GstTrace *_gst_trace_default = NULL;
gint _gst_trace_on = 1;

GstTrace *
gst_trace_new (guchar * filename, gint size)
{
  GstTrace *trace = g_malloc (sizeof (GstTrace));

  g_return_val_if_fail (trace != NULL, NULL);
  trace->filename = g_strdup (filename);
  g_print ("opening '%s'\n", trace->filename);
  trace->fd = open (trace->filename, O_RDWR | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
  perror ("opening trace file");
  g_return_val_if_fail (trace->fd > 0, NULL);
  trace->buf = g_malloc (size * sizeof (GstTraceEntry));
  g_return_val_if_fail (trace->buf != NULL, NULL);
  trace->bufsize = size;
  trace->bufoffset = 0;

  return trace;
}

void
gst_trace_destroy (GstTrace * trace)
{
  g_return_if_fail (trace != NULL);
  g_return_if_fail (trace->buf != NULL);

  if (gst_trace_get_remaining (trace) > 0)
    gst_trace_flush (trace);
  close (trace->fd);
  g_free (trace->buf);
  g_free (trace);
}

void
gst_trace_flush (GstTrace * trace)
{
  if (!trace) {
    trace = _gst_trace_default;
    if (!trace)
      return;
  }

  write (trace->fd, trace->buf, trace->bufoffset * sizeof (GstTraceEntry));
  trace->bufoffset = 0;
}

void
gst_trace_text_flush (GstTrace * trace)
{
  int i;
  const int strsize = 20 + 1 + 10 + 1 + 10 + 1 + 112 + 1 + 1;
  char str[strsize];

  if (!trace) {
    trace = _gst_trace_default;
    if (!trace)
      return;
  }

  for (i = 0; i < trace->bufoffset; i++) {
    snprintf (str, strsize, "%20lld %10d %10d %s\n",
	      trace->buf[i].timestamp,
	      trace->buf[i].sequence, trace->buf[i].data, trace->buf[i].message);
    write (trace->fd, str, strlen (str));
  }
  trace->bufoffset = 0;
}

void
gst_trace_set_default (GstTrace * trace)
{
  g_return_if_fail (trace != NULL);
  _gst_trace_default = trace;
}

void
_gst_trace_add_entry (GstTrace * trace, guint32 seq, guint32 data, gchar * msg)
{
  GstTraceEntry *entry;

  if (!trace) {
    trace = _gst_trace_default;
    if (!trace)
      return;
  }

  entry = trace->buf + trace->bufoffset;
  read_tsc (&(entry->timestamp));
  entry->sequence = seq;
  entry->data = data;
  strncpy (entry->message, msg, 112);
  trace->bufoffset++;

  gst_trace_flush (trace);
}