ceph/src/client/Trace.cc

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3 /*
   4  * Ceph - scalable distributed file system
   5  *
   6  * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
   7  *
   8  * This is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License version 2.1, as published by the Free Software
  11  * Foundation.  See file COPYING.
  12  *
  13  */
  14
  15
  16
  17 #include "Trace.h"
  18 #include "common/debug.h"
  19
  20 #include <iostream>
  21 #include <map>
  22
  23 #include "common/Mutex.h"
  24
  25 #include "common/config.h"
  26
  27 #include <sys/types.h>
  28 #include <sys/stat.h>
  29 #include <fcntl.h>
  30
  31
  32
  33
  34
  35 void Trace::start()
  36 {
  37   //cout << "start" << std::endl;
  38   delete fs;
  39
  40   fs = new ifstream();
  41   fs->open(filename);
  42   if (!fs->is_open()) {
  43     //generic_dout(0) << "** unable to open trace file " << filename << dendl;
  44     ceph_abort();
  45   }
  46   //generic_dout(2) << "opened traced file '" << filename << "'" << dendl;
  47
  48   // read first line
  49   getline(*fs, line);
  50   //cout << "first line is " << line << std::endl;
  51
  52   _line = 1;
  53 }
  54
  55 const char *Trace::peek_string(string &buf, const char *prefix)
  56 {
  57   //if (prefix) cout << "prefix '" << prefix << "' line '" << line << "'" << std::endl;
  58   if (prefix &&
  59       strstr(line.c_str(), "/prefix") == line.c_str()) {
  60     buf.clear();
  61     buf.append(prefix);
  62     buf.append(line.c_str() + strlen("/prefix"));
  63   } else {
  64     buf = line;
  65   }
  66   return buf.c_str();
  67 }
  68
  69
  70 const char *Trace::get_string(string &buf, const char *prefix)
  71 {
  72   peek_string(buf, prefix);
  73
  74   //cout << "buf is " << buf << std::endl;
  75   // read next line (and detect eof early)
  76   _line++;
  77   getline(*fs, line);
  78   //cout << "next line is " << line << std::endl;
  79
  80   return buf.c_str();
  81 }