Nigel Rantor / azure_c_shared_utility

Azure IoT common library

Fork of azure_c_shared_utility by Azure IoT

consolelogger.c@27:8656a313842b, 2017-05-22 (annotated)

Committer:
AzureIoTClient
Date:
Mon May 22 10:35:55 2017 -0700
Revision:
27:8656a313842b
Parent:
25:8507bf644fdf 
1.1.15

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Azure.IoT Build 6:c55b013dfc2a 1 // Copyright (c) Microsoft. All rights reserved.
Azure.IoT Build 6:c55b013dfc2a 2 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
Azure.IoT Build 6:c55b013dfc2a 3
Azure.IoT Build 6:c55b013dfc2a 4 #include <stdarg.h>
Azure.IoT Build 6:c55b013dfc2a 5 #include <stdio.h>
AzureIoTClient 19:2e0811512ceb 6 #include <time.h>
Azure.IoT Build 6:c55b013dfc2a 7 #include "azure_c_shared_utility/xlogging.h"
AzureIoTClient 25:8507bf644fdf 8 #include "azure_c_shared_utility/consolelogger.h"
Azure.IoT Build 6:c55b013dfc2a 9
AzureIoTClient 27:8656a313842b 10 #if (defined(_MSC_VER)) && (!(defined WINCE))
AzureIoTClient 27:8656a313842b 11 #include "windows.h"
AzureIoTClient 27:8656a313842b 12
AzureIoTClient 27:8656a313842b 13 /*returns a string as if printed by vprintf*/
AzureIoTClient 27:8656a313842b 14 static char* vprintf_alloc(const char* format, va_list va)
AzureIoTClient 27:8656a313842b 15 {
AzureIoTClient 27:8656a313842b 16 char* result;
AzureIoTClient 27:8656a313842b 17 int neededSize = vsnprintf(NULL, 0, format, va);
AzureIoTClient 27:8656a313842b 18 if (neededSize < 0)
AzureIoTClient 27:8656a313842b 19 {
AzureIoTClient 27:8656a313842b 20 result = NULL;
AzureIoTClient 27:8656a313842b 21 }
AzureIoTClient 27:8656a313842b 22 else
AzureIoTClient 27:8656a313842b 23 {
AzureIoTClient 27:8656a313842b 24 result = (char*)malloc(neededSize + 1);
AzureIoTClient 27:8656a313842b 25 if (result == NULL)
AzureIoTClient 27:8656a313842b 26 {
AzureIoTClient 27:8656a313842b 27 /*return as is*/
AzureIoTClient 27:8656a313842b 28 }
AzureIoTClient 27:8656a313842b 29 else
AzureIoTClient 27:8656a313842b 30 {
AzureIoTClient 27:8656a313842b 31 if (vsnprintf(result, neededSize + 1, format, va) != neededSize)
AzureIoTClient 27:8656a313842b 32 {
AzureIoTClient 27:8656a313842b 33 free(result);
AzureIoTClient 27:8656a313842b 34 result = NULL;
AzureIoTClient 27:8656a313842b 35 }
AzureIoTClient 27:8656a313842b 36 }
AzureIoTClient 27:8656a313842b 37 }
AzureIoTClient 27:8656a313842b 38 return result;
AzureIoTClient 27:8656a313842b 39 }
AzureIoTClient 27:8656a313842b 40
AzureIoTClient 27:8656a313842b 41 /*returns a string as if printed by printf*/
AzureIoTClient 27:8656a313842b 42 static char* printf_alloc(const char* format, ...)
AzureIoTClient 27:8656a313842b 43 {
AzureIoTClient 27:8656a313842b 44 char* result;
AzureIoTClient 27:8656a313842b 45 va_list va;
AzureIoTClient 27:8656a313842b 46 va_start(va, format);
AzureIoTClient 27:8656a313842b 47 result = vprintf_alloc(format, va);
AzureIoTClient 27:8656a313842b 48 va_end(va);
AzureIoTClient 27:8656a313842b 49 return result;
AzureIoTClient 27:8656a313842b 50 }
AzureIoTClient 27:8656a313842b 51
AzureIoTClient 27:8656a313842b 52 /*returns NULL if it fails*/
AzureIoTClient 27:8656a313842b 53 static char* lastErrorToString(DWORD lastError)
AzureIoTClient 27:8656a313842b 54 {
AzureIoTClient 27:8656a313842b 55 char* result;
AzureIoTClient 27:8656a313842b 56 if (lastError == 0)
AzureIoTClient 27:8656a313842b 57 {
AzureIoTClient 27:8656a313842b 58 result = printf_alloc(""); /*no error should appear*/
AzureIoTClient 27:8656a313842b 59 if (result == NULL)
AzureIoTClient 27:8656a313842b 60 {
AzureIoTClient 27:8656a313842b 61 (void)printf("failure in printf_alloc");
AzureIoTClient 27:8656a313842b 62 }
AzureIoTClient 27:8656a313842b 63 else
AzureIoTClient 27:8656a313842b 64 {
AzureIoTClient 27:8656a313842b 65 /*return as is*/
AzureIoTClient 27:8656a313842b 66 }
AzureIoTClient 27:8656a313842b 67 }
AzureIoTClient 27:8656a313842b 68 else
AzureIoTClient 27:8656a313842b 69 {
AzureIoTClient 27:8656a313842b 70 char temp[MESSAGE_BUFFER_SIZE];
AzureIoTClient 27:8656a313842b 71 if (FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, lastError, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), temp, MESSAGE_BUFFER_SIZE, NULL) == 0)
AzureIoTClient 27:8656a313842b 72 {
AzureIoTClient 27:8656a313842b 73 result = printf_alloc("GetLastError()=0X%x", lastError);
AzureIoTClient 27:8656a313842b 74 if (result == NULL)
AzureIoTClient 27:8656a313842b 75 {
AzureIoTClient 27:8656a313842b 76 (void)printf("failure in printf_alloc\n");
AzureIoTClient 27:8656a313842b 77 /*return as is*/
AzureIoTClient 27:8656a313842b 78 }
AzureIoTClient 27:8656a313842b 79 else
AzureIoTClient 27:8656a313842b 80 {
AzureIoTClient 27:8656a313842b 81 /*return as is*/
AzureIoTClient 27:8656a313842b 82 }
AzureIoTClient 27:8656a313842b 83 }
AzureIoTClient 27:8656a313842b 84 else
AzureIoTClient 27:8656a313842b 85 {
AzureIoTClient 27:8656a313842b 86 /*eliminate the \r or \n from the string*/
AzureIoTClient 27:8656a313842b 87 /*one replace of each is enough*/
AzureIoTClient 27:8656a313842b 88 char* whereAreThey;
AzureIoTClient 27:8656a313842b 89 if ((whereAreThey = strchr(temp, '\r')) != NULL)
AzureIoTClient 27:8656a313842b 90 {
AzureIoTClient 27:8656a313842b 91 *whereAreThey = '\0';
AzureIoTClient 27:8656a313842b 92 }
AzureIoTClient 27:8656a313842b 93 if ((whereAreThey = strchr(temp, '\n')) != NULL)
AzureIoTClient 27:8656a313842b 94 {
AzureIoTClient 27:8656a313842b 95 *whereAreThey = '\0';
AzureIoTClient 27:8656a313842b 96 }
AzureIoTClient 27:8656a313842b 97
AzureIoTClient 27:8656a313842b 98 result = printf_alloc("GetLastError()==0X%x (%s)", lastError, temp);
AzureIoTClient 27:8656a313842b 99
AzureIoTClient 27:8656a313842b 100 if (result == NULL)
AzureIoTClient 27:8656a313842b 101 {
AzureIoTClient 27:8656a313842b 102 (void)printf("failure in printf_alloc\n");
AzureIoTClient 27:8656a313842b 103 /*return as is*/
AzureIoTClient 27:8656a313842b 104 }
AzureIoTClient 27:8656a313842b 105 else
AzureIoTClient 27:8656a313842b 106 {
AzureIoTClient 27:8656a313842b 107 /*return as is*/
AzureIoTClient 27:8656a313842b 108 }
AzureIoTClient 27:8656a313842b 109 }
AzureIoTClient 27:8656a313842b 110 }
AzureIoTClient 27:8656a313842b 111 return result;
AzureIoTClient 27:8656a313842b 112 }
AzureIoTClient 27:8656a313842b 113 /*this function will use 1x printf (in the happy case) .*/
AzureIoTClient 27:8656a313842b 114 /*more than 1x printf / function call can mean intermingled LogErrors in a multithreaded env*/
AzureIoTClient 27:8656a313842b 115 /*the function will also attempt to produce some human readable strings for GetLastError*/
AzureIoTClient 27:8656a313842b 116 void consolelogger_log_with_GetLastError(const char* file, const char* func, int line, const char* format, ...)
AzureIoTClient 27:8656a313842b 117 {
AzureIoTClient 27:8656a313842b 118 DWORD lastError;
AzureIoTClient 27:8656a313842b 119 char* lastErrorAsString;
AzureIoTClient 27:8656a313842b 120 int lastErrorAsString_should_be_freed;
AzureIoTClient 27:8656a313842b 121 time_t t;
AzureIoTClient 27:8656a313842b 122 int systemMessage_should_be_freed;
AzureIoTClient 27:8656a313842b 123 char* systemMessage;
AzureIoTClient 27:8656a313842b 124 int userMessage_should_be_freed;
AzureIoTClient 27:8656a313842b 125 char* userMessage;
AzureIoTClient 27:8656a313842b 126
AzureIoTClient 27:8656a313842b 127 va_list args;
AzureIoTClient 27:8656a313842b 128 va_start(args, format);
AzureIoTClient 27:8656a313842b 129
AzureIoTClient 27:8656a313842b 130 /*this is what this case will do:
AzureIoTClient 27:8656a313842b 131 1. snip the last error
AzureIoTClient 27:8656a313842b 132 2. create a string with what that last error means
AzureIoTClient 27:8656a313842b 133 3. printf the system message (__FILE__, __LINE__ etc) + the last error + whatever the user wanted
AzureIoTClient 27:8656a313842b 134 */
AzureIoTClient 27:8656a313842b 135 /*1. snip the last error*/
AzureIoTClient 27:8656a313842b 136 lastError = GetLastError();
AzureIoTClient 27:8656a313842b 137
AzureIoTClient 27:8656a313842b 138 /*2. create a string with what that last error means*/
AzureIoTClient 27:8656a313842b 139 lastErrorAsString = lastErrorToString(lastError);
AzureIoTClient 27:8656a313842b 140 if (lastErrorAsString == NULL)
AzureIoTClient 27:8656a313842b 141 {
AzureIoTClient 27:8656a313842b 142 (void)printf("failure in lastErrorToString");
AzureIoTClient 27:8656a313842b 143 lastErrorAsString = "";
AzureIoTClient 27:8656a313842b 144 lastErrorAsString_should_be_freed = 0;
AzureIoTClient 27:8656a313842b 145 }
AzureIoTClient 27:8656a313842b 146 else
AzureIoTClient 27:8656a313842b 147 {
AzureIoTClient 27:8656a313842b 148 lastErrorAsString_should_be_freed = 1;
AzureIoTClient 27:8656a313842b 149 }
AzureIoTClient 27:8656a313842b 150
AzureIoTClient 27:8656a313842b 151 t = time(NULL);
AzureIoTClient 27:8656a313842b 152 systemMessage = printf_alloc("Error: Time:%.24s File:%s Func:%s Line:%d %s", ctime(&t), file, func, line, lastErrorAsString);
AzureIoTClient 27:8656a313842b 153
AzureIoTClient 27:8656a313842b 154 if (systemMessage == NULL)
AzureIoTClient 27:8656a313842b 155 {
AzureIoTClient 27:8656a313842b 156 systemMessage = "";
AzureIoTClient 27:8656a313842b 157 (void)printf("Error: [FAILED] Time:%.24s File : %s Func : %s Line : %d %s", ctime(&t), file, func, line, lastErrorAsString);
AzureIoTClient 27:8656a313842b 158 systemMessage_should_be_freed = 0;
AzureIoTClient 27:8656a313842b 159 }
AzureIoTClient 27:8656a313842b 160 else
AzureIoTClient 27:8656a313842b 161 {
AzureIoTClient 27:8656a313842b 162 systemMessage_should_be_freed = 1;
AzureIoTClient 27:8656a313842b 163 }
AzureIoTClient 27:8656a313842b 164
AzureIoTClient 27:8656a313842b 165 userMessage = vprintf_alloc(format, args);
AzureIoTClient 27:8656a313842b 166 if (userMessage == NULL)
AzureIoTClient 27:8656a313842b 167 {
AzureIoTClient 27:8656a313842b 168 (void)printf("[FAILED] ");
AzureIoTClient 27:8656a313842b 169 (void)vprintf(format, args);
AzureIoTClient 27:8656a313842b 170 (void)printf("\n");
AzureIoTClient 27:8656a313842b 171 userMessage_should_be_freed = 0;
AzureIoTClient 27:8656a313842b 172 }
AzureIoTClient 27:8656a313842b 173 else
AzureIoTClient 27:8656a313842b 174 {
AzureIoTClient 27:8656a313842b 175 /*3. printf the system message(__FILE__, __LINE__ etc) + the last error + whatever the user wanted*/
AzureIoTClient 27:8656a313842b 176 (void)printf("%s %s\n", systemMessage, userMessage);
AzureIoTClient 27:8656a313842b 177 userMessage_should_be_freed = 1;
AzureIoTClient 27:8656a313842b 178 }
AzureIoTClient 27:8656a313842b 179
AzureIoTClient 27:8656a313842b 180 if (userMessage_should_be_freed == 1)
AzureIoTClient 27:8656a313842b 181 {
AzureIoTClient 27:8656a313842b 182 free(userMessage);
AzureIoTClient 27:8656a313842b 183 }
AzureIoTClient 27:8656a313842b 184
AzureIoTClient 27:8656a313842b 185 if (systemMessage_should_be_freed == 1)
AzureIoTClient 27:8656a313842b 186 {
AzureIoTClient 27:8656a313842b 187 free(systemMessage);
AzureIoTClient 27:8656a313842b 188 }
AzureIoTClient 27:8656a313842b 189
AzureIoTClient 27:8656a313842b 190 if (lastErrorAsString_should_be_freed == 1)
AzureIoTClient 27:8656a313842b 191 {
AzureIoTClient 27:8656a313842b 192 free(lastErrorAsString);
AzureIoTClient 27:8656a313842b 193 }
AzureIoTClient 27:8656a313842b 194 va_end(args);
AzureIoTClient 27:8656a313842b 195 }
AzureIoTClient 27:8656a313842b 196 #endif
AzureIoTClient 27:8656a313842b 197
AzureIoTClient 25:8507bf644fdf 198 #if defined(__GNUC__)
AzureIoTClient 25:8507bf644fdf 199 __attribute__ ((format (printf, 6, 7)))
AzureIoTClient 25:8507bf644fdf 200 #endif
AzureIoTClient 27:8656a313842b 201 void consolelogger_log(LOG_CATEGORY log_category, const char* file, const char* func, int line, unsigned int options, const char* format, ...)
Azure.IoT Build 6:c55b013dfc2a 202 {
AzureIoTClient 27:8656a313842b 203 time_t t;
AzureIoTClient 8:3db46d1e5471 204 va_list args;
AzureIoTClient 8:3db46d1e5471 205 va_start(args, format);
AzureIoTClient 7:1af47e3a19b6 206
AzureIoTClient 27:8656a313842b 207 t = time(NULL);
AzureIoTClient 7:1af47e3a19b6 208
AzureIoTClient 7:1af47e3a19b6 209 switch (log_category)
AzureIoTClient 7:1af47e3a19b6 210 {
AzureIoTClient 18:6d8a413a4d9a 211 case AZ_LOG_INFO:
AzureIoTClient 7:1af47e3a19b6 212 (void)printf("Info: ");
AzureIoTClient 7:1af47e3a19b6 213 break;
AzureIoTClient 18:6d8a413a4d9a 214 case AZ_LOG_ERROR:
AzureIoTClient 8:3db46d1e5471 215 (void)printf("Error: Time:%.24s File:%s Func:%s Line:%d ", ctime(&t), file, func, line);
AzureIoTClient 7:1af47e3a19b6 216 break;
AzureIoTClient 7:1af47e3a19b6 217 default:
AzureIoTClient 7:1af47e3a19b6 218 break;
AzureIoTClient 7:1af47e3a19b6 219 }
AzureIoTClient 7:1af47e3a19b6 220
AzureIoTClient 27:8656a313842b 221 (void)vprintf(format, args);
AzureIoTClient 27:8656a313842b 222 va_end(args);
Azure.IoT Build 6:c55b013dfc2a 223
Azure.IoT Build 6:c55b013dfc2a 224 (void)log_category;
AzureIoTClient 27:8656a313842b 225 if (options & LOG_LINE)
AzureIoTClient 27:8656a313842b 226 {
AzureIoTClient 27:8656a313842b 227 (void)printf("\r\n");
AzureIoTClient 27:8656a313842b 228 }
Azure.IoT Build 6:c55b013dfc2a 229 }
AzureIoTClient 27:8656a313842b 230