1 // Copyright 2020 The Pigweed Authors
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not
4 // use this file except in compliance with the License. You may obtain a copy of
5 // the License at
6 //
7 // https://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, WITHOUT
11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
12 // License for the specific language governing permissions and limitations under
13 // the License.
14
15 // This is test verifies that the logging backend:
16 //
17 // - Compiles as plain C
18 // - Runs when compiled as C
19 //
20 // Unfortunately, since we do not know where the log sink actually goes, the
21 // logging functionality itself is not verified beyond compiling and running.
22
23 #define PW_LOG_MODULE_NAME "CTS"
24
25 #include "pw_log/log.h"
26
27 #ifdef __cplusplus
28 #error "This file must be compiled as plain C to verify C compilation works."
29 #endif // __cplusplus
30
LoggingFromFunctionPlainC(void)31 static void LoggingFromFunctionPlainC(void) { PW_LOG_INFO("From a function!"); }
32
33 static void CustomFormatStringTest(void);
34
BasicLogTestPlainC(void)35 void BasicLogTestPlainC(void) {
36 int n = 3;
37
38 // Debug level
39 PW_LOG_DEBUG("This log statement should be at DEBUG level; no args");
40 for (int i = 0; i < n; ++i) {
41 PW_LOG_DEBUG("Counting: %d", i);
42 }
43 PW_LOG_DEBUG("Here is a string: %s; with another string %s", "foo", "bar");
44
45 // Info level
46 PW_LOG_INFO("This log statement should be at INFO level; no args");
47 for (int i = 0; i < n; ++i) {
48 PW_LOG_INFO("Counting: %d", i);
49 }
50 PW_LOG_INFO("Here is a string: %s; with another string %s", "foo", "bar");
51
52 // Warn level
53 PW_LOG_WARN("This log statement should be at WARN level; no args");
54 for (int i = 0; i < n; ++i) {
55 PW_LOG_WARN("Counting: %d", i);
56 }
57 PW_LOG_WARN("Here is a string: %s; with another string %s", "foo", "bar");
58
59 // Error level.
60 PW_LOG_ERROR("This log statement should be at ERROR level; no args");
61 for (int i = 0; i < n; ++i) {
62 PW_LOG_ERROR("Counting: %d", i);
63 }
64 PW_LOG_ERROR("Here is a string: %s; with another string %s", "foo", "bar");
65
66 // Critical level.
67 PW_LOG_CRITICAL("This log is the last one; device should reboot");
68
69 // Core log macro, with manually specified level and flags.
70 PW_LOG(PW_LOG_LEVEL_DEBUG, 0, "A manual DEBUG-level message");
71 PW_LOG(PW_LOG_LEVEL_DEBUG, 1, "A manual DEBUG-level message; with a flag");
72
73 PW_LOG(PW_LOG_LEVEL_INFO, 0, "A manual INFO-level message");
74 PW_LOG(PW_LOG_LEVEL_INFO, 1, "A manual INFO-level message; with a flag");
75
76 PW_LOG(PW_LOG_LEVEL_WARN, 0, "A manual WARN-level message");
77 PW_LOG(PW_LOG_LEVEL_WARN, 1, "A manual WARN-level message; with a flag");
78
79 PW_LOG(PW_LOG_LEVEL_ERROR, 0, "A manual ERROR-level message");
80 PW_LOG(PW_LOG_LEVEL_ERROR, 1, "A manual ERROR-level message; with a flag");
81
82 PW_LOG(PW_LOG_LEVEL_CRITICAL, 0, "A manual CRITICAL-level message");
83 PW_LOG(
84 PW_LOG_LEVEL_CRITICAL, 1, "A manual CRITICAL-level message; with a flag");
85
86 // Log levels other than the standard ones work; what each backend does is
87 // implementation defined.
88 PW_LOG(0, PW_LOG_DEFAULT_FLAGS, "Custom log level: 0");
89 PW_LOG(1, PW_LOG_DEFAULT_FLAGS, "Custom log level: 1");
90 PW_LOG(2, PW_LOG_DEFAULT_FLAGS, "Custom log level: 2");
91 PW_LOG(3, PW_LOG_DEFAULT_FLAGS, "Custom log level: 3");
92 PW_LOG(100, PW_LOG_DEFAULT_FLAGS, "Custom log level: 100");
93
94 // Logging from a function.
95 LoggingFromFunctionPlainC();
96
97 // Changing the module name mid-file.
98 #undef PW_LOG_MODULE_NAME
99 #define PW_LOG_MODULE_NAME "XYZ"
100 PW_LOG_INFO("This has a custom module name");
101 PW_LOG_INFO("So does this");
102
103 CustomFormatStringTest();
104 }
105
106 #undef PW_LOG
107 #define PW_LOG(level, flags, message, ...) \
108 DoNothingFakeFunction("%d/%d/%d: incoming transmission [" message "]", \
109 level, \
110 __LINE__, \
111 flags PW_COMMA_ARGS(__VA_ARGS__))
112
113 static void DoNothingFakeFunction(const char* f, ...) PW_PRINTF_FORMAT(1, 2);
114
DoNothingFakeFunction(const char * f,...)115 static void DoNothingFakeFunction(const char* f, ...) { (void)f; }
116
CustomFormatStringTest(void)117 static void CustomFormatStringTest(void) {
118 PW_LOG_DEBUG("Abc");
119 PW_LOG_INFO("Abc %d", 123);
120 PW_LOG_WARN("Abc %d %s", 123, "four");
121 }
122