1 // Copyright 2015 Google Inc. All rights reserved
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 #ifndef LOG_H_
16 #define LOG_H_
17 
18 #include <errno.h>
19 #include <stdio.h>
20 #include <stdlib.h>
21 #include <string.h>
22 
23 #include "flags.h"
24 #include "stringprintf.h"
25 
26 using namespace std;
27 
28 extern bool g_log_no_exit;
29 extern string* g_last_error;
30 
31 // Useful for logging-only arguments.
32 #define UNUSED __attribute__((unused))
33 
34 #ifdef NOLOG
35 #define LOG(args...)
36 #else
37 #define LOG(args...) do {                                           \
38     fprintf(stderr, "*kati*: %s\n", StringPrintf(args).c_str());    \
39   } while(0)
40 #endif
41 
42 #define LOG_STAT(args...) do {                                      \
43     if (g_flags.enable_stat_logs)                                   \
44       fprintf(stderr, "*kati*: %s\n", StringPrintf(args).c_str());  \
45   } while(0)
46 
47 #define PLOG(...) do {                                              \
48     fprintf(stderr, "%s: %s\n", StringPrintf(__VA_ARGS__).c_str(),  \
49             strerror(errno));                                       \
50   } while (0)
51 
52 #define PERROR(...) do {                                            \
53     PLOG(__VA_ARGS__);                                              \
54     exit(1);                                                        \
55   } while (0)
56 
57 #define WARN(...) do {                                          \
58     fprintf(stderr, "%s\n", StringPrintf(__VA_ARGS__).c_str()); \
59   } while (0)
60 
61 #define KATI_WARN(...) do {                                             \
62     if (g_flags.enable_kati_warnings)                                   \
63       fprintf(stderr, "%s\n", StringPrintf(__VA_ARGS__).c_str());       \
64   } while (0)
65 
66 #define ERROR(...) do {                                                 \
67     if (!g_log_no_exit) {                                               \
68       fprintf(stderr, "%s\n", StringPrintf(__VA_ARGS__).c_str());       \
69       exit(1);                                                          \
70     }                                                                   \
71     g_last_error = new string(StringPrintf(__VA_ARGS__));               \
72   } while (0)
73 
74 #define CHECK(c) if (!(c)) ERROR("%s:%d: %s", __FILE__, __LINE__, #c)
75 
76 #endif  // LOG_H_
77