log.h revision f4c12fce1ee58e670f9c3fce46c40296ba9ee8a2 
1// log.h
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//      http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14//
15// Author: riley@google.com (Michael Riley)
16//
17// \file
18// Google-style logging declarations and inline definitions.
19
20#ifndef FST_LIB_LOG_H__
21#define FST_LIB_LOG_H__
22
23#include <cassert>
24#include <iostream>
25#include <string>
26
27#include <fst/types.h>
28#include <fst/flags.h>
29
30using std::string;
31
32DECLARE_int32(v);
33
34class LogMessage {
35 public:
36  LogMessage(const string &type) : fatal_(type == "FATAL") {
37    std::cerr << type << ": ";
38  }
39  ~LogMessage() {
40    std::cerr << std::endl;
41    if(fatal_)
42      exit(1);
43  }
44  std::ostream &stream() { return std::cerr; }
45
46 private:
47  bool fatal_;
48};
49
50#define LOG(type) LogMessage(#type).stream()
51#define VLOG(level) if ((level) <= FLAGS_v) LOG(INFO)
52
53// Checks
54inline void CHECK(bool x) { assert(x); }
55
56#define CHECK_EQ(x, y) CHECK((x) == (y))
57#define CHECK_LT(x, y) CHECK((x) < (y))
58#define CHECK_GT(x, y) CHECK((x) > (y))
59#define CHECK_LE(x, y) CHECK((x) <= (y))
60#define CHECK_GE(x, y) CHECK((x) >= (y))
61#define CHECK_NE(x, y) CHECK((x) != (y))
62
63// Ports
64#define ATTRIBUTE_DEPRECATED __attribute__((deprecated))
65
66#endif  // FST_LIB_LOG_H__
67