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annotate anagram/support/log.cpp @ 0:13d2b8934445

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Import AnaGram (near-)release tree into Mercurial.
author David A. Holland
date Sat, 22 Dec 2007 17:52:45 -0500
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1 /*
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2 * AnaGram, A System for Syntax Directed Programming
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3 * Copyright 1993-2002 Parsifal Software. All Rights Reserved.
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4 * Copyright 2006 David A. Holland. All Rights Reserved.
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5 * See the file COPYING for license and usage terms.
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6 *
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7 * log.cpp - logging module.
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8 *
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9 * To use the logging stuff, turn on INCLUDE_LOGGING here and in
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10 * the source files you want to log from. Then create a file called
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11 * "aglog.ctl" contaning lines of the form
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12 * +foo
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13 * -foo
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14 * to turn logging on or off (respectively) for LOGSECTION names
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15 * matching "foo". With Unix builds, "foo" can be a shell glob (like
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16 * "check_*") but owing to the lack of library support this is not
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17 * supported in Windows. The control settings are applied in order.
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18 *
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19 * The log entries land in the file "ag.log", which is truncated with
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20 * every new execution.
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21 */
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22
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23 #include <stdarg.h>
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24 #include <stdio.h>
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25 #include <string.h>
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26 #include <time.h>
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27
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28 #ifdef AG_ON_UNIX
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29 #include <fnmatch.h>
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30 #endif
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31
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32 #ifdef VACLGUI
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33 //#include <icritsec.hpp>
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34 //#include "resource.h"
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35 #endif
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36
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37 #include "port.h"
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38
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39 #include "agstring.h"
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40 #include "agstack.h"
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41 #include "textfile.h"
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42
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43 //#define INCLUDE_LOGGING
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44 #include "log.h"
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45
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46 #define PATH_LOGFILE "ag.log"
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47 #define PATH_CTLFILE "aglog.ctl"
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48 #define INDENT 3
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49
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50 #ifdef INCLUDE_LOGGING
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51
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52 static int initialized = 0;
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53 static FILE *logfile = NULL;
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54 static LogSwitch masterswitch = LOG_OFF;
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55 static int indent = 0;
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56 static LogSection *sectionstack = NULL;
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57
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58 // This must be a pointer, not a global object, in case someone wants to
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59 // log from a global constructor somewhere.
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60 static AgStack<AgString> *matches;
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61
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62
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63 ////////////////////////////////////////////////////////////
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64
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65 static int readcontrol(void) {
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66 LOGSECTION_ON("readcontrol");
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67
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68 text_file control(PATH_CTLFILE);
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69 if ((char *)control == 0) {
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70 //printf("Log: failed to open control file %s\n", PATH_CTLFILE);
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71 return -1;
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72 }
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73 //printf("Log: control file read\n");
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74
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75 unsigned num_control_lines = control.size().y;
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76
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77 //printf("Log: trying to log something\n");
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78 LOGV(num_control_lines);
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79
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80 //printf("Log: processing control file\n");
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81 for (unsigned i = 0; i < num_control_lines; i++) {
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82 char *line = control.line(i);
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83 while (*line==' ') {
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84 line++;
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85 }
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86
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87 char *p = strchr(line, '\n');
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88 if (p) {
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89 *p = 0;
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90 if (p != line && p[-1]=='\r') {
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91 *(--p) = 0;
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92 }
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93 }
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94 else {
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95 p = line + strlen(line);
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96 }
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97 while (p != line && p[-1]==' ') {
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98 *(--p) = 0;
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99 }
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100
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101 if (*line==0 || *line=='#') {
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102 continue;
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103 }
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104
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105 LOGV(line);
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106
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107 if ((*line!='+' && *line!='-') || strlen(line)==1) {
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108 LOGS("...line is invalid");
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109 continue;
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110 }
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111
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112 matches->push(AgString(line));
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113 }
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114
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115 return 0;
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116 }
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117
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118 static LogSwitch checkcontrol(const char *name) {
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119 unsigned i, n = matches->size();
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120 for (i=0; i<n; i++) {
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121 const char *ctl = (*matches)[i].pointer();
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122 assert(ctl[0] == '+' || ctl[0] == '-');
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123
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124 int matched;
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125 #ifdef AG_ON_UNIX
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126 matched = !fnmatch(ctl+1, name, 0);
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127 #else
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128 if (!strcmp(ctl+1, "*")) {
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129 matched = 1;
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130 }
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131 else {
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132 matched = !strcmp(ctl+1, name);
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133 }
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134 #endif
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135
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136 if (matched) {
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137 return ctl[0] == '+' ? LOG_ON : LOG_OFF;
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138 }
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139 }
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140
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141 return LOG_MAYBE;
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142 }
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143
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144 ////////////////////////////////////////////////////////////
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145
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146 static int loginit(void) {
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147 if (initialized) {
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148 return 0;
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149 }
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150
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151 //printf("Log: initializing\n");
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152 logfile = fopen(PATH_LOGFILE, "w");
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153 if (!logfile) {
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154 //printf("Log: failed to open output file %s\n", PATH_LOGFILE);
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155 return -1;
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156 }
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157 //printf("Log: opened output file\n");
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158 fprintf(logfile, "*** AnaGram log file ***\n");
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159
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160 masterswitch = LOG_ON;
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161 initialized = 1;
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162 matches = new AgStack<AgString>;
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163
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164 if (readcontrol()) {
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165 fprintf(logfile, "\nReading control file %s failed\n", PATH_CTLFILE);
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166 fclose(logfile);
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167 logfile = NULL;
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168 initialized = 0;
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169 delete matches;
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170 matches = NULL;
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171 masterswitch = LOG_OFF;
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172 return -1;
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173 }
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174
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175 masterswitch = LOG_OFF;
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176
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177 //printf("Log: done initializing\n");
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178 return 0;
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179 }
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180
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181 #if 0 /* no way to reach this */
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182 static void logclose(void) {
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183 if (initialized) {
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184
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185 assert(logfile != NULL);
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186 fclose(logfile);
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187 logfile = NULL;
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188
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189 delete matches;
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190 matches = NULL;
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191
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192 masterswitch = LOG_OFF;
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193 initialized = 0;
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194 }
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195 }
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196 #endif /* 0 */
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197
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198 LogSection::LogSection(const char *name_, LogSwitch caller_requested) {
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199 if (loginit()) return;
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200
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201 previous = sectionstack;
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202 sectionstack = this;
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203 name = name_;
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204 saved_switch = masterswitch;
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205
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206 // get setting instructed via the control file
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207 masterswitch = LOG_ON;
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208 LogSwitch ctl_setting = checkcontrol(name);
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209 masterswitch = LOG_OFF;
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210
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211 // the control file takes precedence, unless it says "maybe"
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212 LogSwitch new_setting;
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213 if (ctl_setting != LOG_MAYBE) {
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214 new_setting = ctl_setting;
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215 }
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216 else {
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217 new_setting = caller_requested;
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218 }
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219
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220 if (new_setting == LOG_ON) {
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221 masterswitch = LOG_ON;
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222 logeol(), dolog("BEGIN "), dolog(name), dolog(" "), logtime();
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223 indent += INDENT;
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224 }
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225 }
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226
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227 LogSection::~LogSection() {
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228 if (!initialized) return;
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229
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230 if (masterswitch == LOG_ON) {
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231 indent -= INDENT;
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232 logeol(), dolog("END "), dolog(name), dolog(" "), logtime();
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233 }
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234 masterswitch = saved_switch;
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235 sectionstack = previous;
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236 }
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237
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238 void LogSection::logstack(void) {
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239 LOGSECTION("logsectionstack");
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240 LogSection *s = sectionstack;
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241 while (s) {
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242 logeol(), dolog(s->name);
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243 s = s->previous;
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244 }
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245 }
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246
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247 void logeol(void) {
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248 if (loginit() || masterswitch == LOG_OFF) return;
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249
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250 assert(logfile != NULL);
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251 fprintf(logfile, "\n%*s", indent, "");
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252 fflush(logfile);
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253 }
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254
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255 static void logf(const char *fmt, ...) {
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256 if (loginit() || masterswitch == LOG_OFF) return;
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257
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258 assert(logfile != NULL);
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259 va_list ap;
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260 va_start(ap, fmt);
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261 vfprintf(logfile, fmt, ap);
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262 va_end(ap);
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263 fflush(logfile);
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264 }
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265
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266 void dolog(const char *s) {
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267 logf("%s", s);
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268 }
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269
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270 void dolog(const AgString &s) {
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271 logf("%s", s.pointer());
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272 }
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273
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274 void dolog(void *p) {
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275 logf("%p", p);
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276 }
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277
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278 void dolog(int n) {
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279 logf("%d", n);
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280 }
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281
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282 void dolog(cint p) {
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283 logf("(%d, %d)", p.x, p.y);
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284 }
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285
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286 void logtime(void) {
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287 char buf[64];
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288 time_t timer = time(NULL);
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289 struct tm *t = gmtime(&timer);
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290 strftime(buf, sizeof(buf), "%Y%m%d %T", t);
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291 logf("%s", buf);
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292 }
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293
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294 #ifdef VACLGUI
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295
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296 void dolog(const IString &s) {
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297 logf("%s", (const char *) s);
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298 }
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299
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300 void dolog(const IPair &p) {
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301 logf("%s", p.asString());
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302 }
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303
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304 void dolog(const IRectangle &r) {
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305 logf("%s", r.asString());
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306 }
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307
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308 void logexception(IException &ie) {
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309 if (loginit() || masterswitch == LOG_OFF) return;
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310
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311 LOGSECTION_ON("Exception");
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312 logeol(), dolog(ie.name()), dolog(ie.text());
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313 int n = ie.locationCount();
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314 for (int i = 0; i < n; i++) {
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315 const IExceptionLocation *loc = ie.locationAtIndex(i);
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316 logeol(), dolog("File: "), dolog(loc->fileName());
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317 logeol(), dolog("Line: "), dolog(loc->lineNumber());
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318 logeol(), dolog("Function: "), dolog(loc->functionName());
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319 }
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320 }
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321
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322 #endif /* VACLGUI */
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323
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324 #else /* not INCLUDE_LOGGING */
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325
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326 #ifdef __IBMCPP__
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327 /* without this, the librarian bombs */
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328 void ibmcpp_is_stupid_in_log_cpp(void) {}
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329 #endif
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330
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331 #endif /* INCLUDE_LOGGING */
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332
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333