libs/pbd/id.cc

   1 /*
   2     Copyright (C) 2000-2007 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include <ostream>
  21 #include <iostream>
  22 #include <stdio.h>
  23
  24 #ifndef __STDC_FORMAT_MACROS
  25 #define __STDC_FORMAT_MACROS
  26 #endif
  27 #include <inttypes.h>
  28
  29 #include "pbd/id.h"
  30 #include <string>
  31
  32 using namespace std;
  33 using namespace PBD;
  34
  35 Glib::Mutex* ID::counter_lock = 0;
  36 uint64_t ID::_counter = 0;
  37
  38 void
  39 ID::init ()
  40 {
  41         if (!counter_lock)
  42                 counter_lock = new Glib::Mutex;
  43 }
  44
  45 ID::ID ()
  46 {
  47         Glib::Mutex::Lock lm (*counter_lock);
  48         _id = _counter++;
  49 }
  50
  51 ID::ID (const ID& other)
  52 {
  53         _id = other._id;
  54 }
  55
  56 ID::ID (string str)
  57 {
  58         string_assign (str);
  59 }
  60
  61 int
  62 ID::string_assign (string str)
  63 {
  64         return sscanf (str.c_str(), "%" PRIu64, &_id) != 0;
  65 }
  66
  67 void
  68 ID::print (char* buf, uint32_t bufsize) const
  69 {
  70         snprintf (buf, bufsize, "%" PRIu64, _id);
  71 }
  72
  73 string ID::to_s() const
  74 {
  75     char buf[32]; // see print()
  76     print(buf, sizeof (buf));
  77     return string(buf);
  78 }
  79
  80 bool
  81 ID::operator== (const string& str) const
  82 {
  83         return to_s() == str;
  84 }
  85
  86 ID&
  87 ID::operator= (string str)
  88 {
  89         string_assign (str);
  90         return *this;
  91 }
  92
  93 ID&
  94 ID::operator= (const ID& other)
  95 {
  96         if (&other != this) {
  97                 _id = other._id;
  98         }
  99         return *this;
 100 }
 101
 102 ostream&
 103 operator<< (ostream& ostr, const ID& _id)
 104 {
 105         char buf[32];
 106         _id.print (buf, sizeof (buf));
 107         ostr << buf;
 108         return ostr;
 109 }
 110