Mercurial > noffle
annotate src/util.c @ 186:7d1f26e7c728 noffle
[svn] Remove case sensitivity in date parse.
author | bears |
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date | Sun, 05 Aug 2001 09:27:17 +0100 |
parents | fed1334d766b |
children | 24d4cd032da5 |
rev | line source |
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43
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1 /* |
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2 util.c |
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3 |
186 | 4 $Id: util.c 301 2001-08-05 08:27:17Z bears $ |
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5 */ |
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6 |
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7 #if HAVE_CONFIG_H |
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8 #include <config.h> |
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9 #endif |
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10 |
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11 #if TIME_WITH_SYS_TIME |
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12 #include <sys/time.h> |
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13 #include <time.h> |
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14 #else |
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15 #if HAVE_SYS_TIME_H |
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16 #include <sys/time.h> |
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17 #else |
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18 #include <time.h> |
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19 #endif |
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20 #endif |
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21 |
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22 #include "util.h" |
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23 #include <errno.h> |
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24 #include <ctype.h> |
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25 #include <sys/types.h> |
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26 #include <sys/stat.h> |
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27 #include <fcntl.h> |
91 | 28 #include <stdlib.h> |
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29 #include <unistd.h> |
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30 #include "configfile.h" |
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31 #include "log.h" |
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32 #include "wildmat.h" |
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33 #include "portable.h" |
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34 |
91 | 35 #if defined(UTIL_TEST) |
36 #define Log_err printf | |
37 #endif | |
38 | |
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39 static const char * |
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40 nextWhiteSpace( const char *p ) |
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41 { |
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42 while ( *p && ! isspace( *p ) ) |
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43 ++p; |
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44 return p; |
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45 } |
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46 |
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47 static const char * |
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48 nextNonWhiteSpace( const char *p ) |
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49 { |
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50 while ( *p && isspace( *p ) ) |
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51 ++p; |
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52 return p; |
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53 } |
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54 |
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55 const char * |
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56 Utl_restOfLn( const char *line, unsigned int token ) |
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57 { |
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58 unsigned int i; |
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59 const char *p; |
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60 |
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61 p = line; |
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62 for ( i = 0; i < token; ++i ) |
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63 { |
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64 p = nextNonWhiteSpace( p ); |
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65 p = nextWhiteSpace( p ); |
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66 } |
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67 p = nextNonWhiteSpace( p ); |
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68 return p; |
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69 } |
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70 |
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71 const char * |
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72 Utl_getLn( Str result, const char *pos ) |
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73 { |
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74 int len = 0; |
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75 const char *p = pos; |
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76 |
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77 if ( ! p ) |
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78 return NULL; |
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79 while ( *p != '\n' ) |
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80 { |
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81 if ( *p == '\0' ) |
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82 { |
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83 if ( len > 0 ) |
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84 Log_err( "Line not terminated by newline: '%s'", pos ); |
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85 return NULL; |
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86 } |
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87 *(result++) = *(p++); |
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88 ++len; |
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89 if ( len >= MAXCHAR - 1 ) |
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90 { |
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91 *result = '\0'; |
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92 Log_err( "Utl_getLn: line too long: %s", result ); |
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93 return ++p; |
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94 } |
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95 } |
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96 *result = '\0'; |
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97 return ++p; |
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98 |
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99 } |
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100 |
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101 const char * |
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102 Utl_ungetLn( const char *str, const char *p ) |
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103 { |
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104 if ( str == p ) |
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105 return FALSE; |
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106 --p; |
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107 if ( *p != '\n' ) |
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108 { |
185
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109 Log_err( "Utl_ungetLn: not at beginning of line" ); |
43
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110 return NULL; |
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111 } |
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112 --p; |
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113 while ( TRUE ) |
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114 { |
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115 if ( p == str ) |
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116 return p; |
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117 if ( *p == '\n' ) |
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118 return p + 1; |
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119 --p; |
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120 } |
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121 } |
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122 |
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123 const char * |
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124 Utl_getHeaderLn( Str result, const char *p ) |
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125 { |
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126 const char * res = Utl_getLn( result, p ); |
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127 |
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128 /* Look for followon line if this isn't a blank line. */ |
109 | 129 if ( res != NULL && result[ 0 ] != '\0' && ! isspace( result[ 0 ] ) ) |
87 | 130 for(;;) |
43
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131 { |
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132 Str nextLine; |
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133 const char *here; |
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134 |
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135 here = res; |
87 | 136 nextLine[ 0 ] = '\0'; |
43
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137 res = Utl_getLn( nextLine, res ); |
87 | 138 if ( res == NULL || nextLine[ 0 ] == '\0' |
109 | 139 || ! isspace( nextLine[ 0 ] ) ) |
43
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140 { |
87 | 141 res = here; |
142 break; | |
43
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143 } |
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144 else |
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145 { |
87 | 146 Utl_catStr( result, "\n" ); |
147 Utl_catStr( result, nextLine ); | |
43
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148 } |
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149 } |
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150 |
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151 return res; |
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152 } |
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153 |
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154 void |
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155 Utl_toLower( Str line ) |
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156 { |
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157 char *p; |
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158 |
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159 p = line; |
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160 while ( *p ) |
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161 { |
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162 *p = tolower( *p ); |
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163 ++p; |
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164 } |
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165 } |
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166 |
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167 char * |
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168 Utl_stripWhiteSpace( char *line ) |
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169 { |
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170 char *p; |
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171 |
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172 while ( isspace( *line ) ) |
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173 ++line; |
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174 p = line + strlen( line ) - 1; |
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175 while ( isspace( *p ) ) |
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176 { |
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177 *p = '\0'; |
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178 --p; |
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179 } |
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180 return line; |
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181 } |
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182 |
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183 void |
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184 Utl_stripComment( char *line ) |
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185 { |
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186 for ( ; *line != '\0'; line++ ) |
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187 if ( *line =='#' ) |
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188 { |
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189 *line = '\0'; |
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190 break; |
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191 } |
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192 } |
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193 |
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194 void |
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195 Utl_cpyStr( Str dst, const char *src ) |
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196 { |
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197 dst[ 0 ] = '\0'; |
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198 strncat( dst, src, MAXCHAR ); |
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199 } |
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200 |
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201 void |
59
e612b263934f
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enz
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202 Utl_cpyStrN( Str dst, const char *src, int n ) |
43
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203 { |
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204 if ( n > MAXCHAR ) |
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205 n = MAXCHAR; |
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206 dst[ 0 ] = '\0'; |
59
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207 strncat( dst, src, (size_t)n ); |
43
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208 } |
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209 |
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210 void |
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211 Utl_catStr( Str dst, const char *src ) |
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212 { |
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213 strncat( dst, src, MAXCHAR - strlen( dst ) ); |
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214 } |
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215 |
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216 void |
59
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enz
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217 Utl_catStrN( Str dst, const char *src, int n ) |
43
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218 { |
59
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|
219 size_t un; |
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|
220 |
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enz
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54
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|
221 ASSERT( n >= 0 ); |
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54
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|
222 un = (size_t)n; |
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enz
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54
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|
223 if ( un > MAXCHAR - strlen( dst ) ) |
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enz
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54
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|
224 un = MAXCHAR - strlen( dst ); |
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enz
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54
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|
225 strncat( dst, src, un ); |
43
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226 } |
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227 |
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228 void |
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229 Utl_stamp( Str file ) |
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230 { |
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231 FILE *f; |
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232 time_t t; |
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233 |
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234 time( &t ); |
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235 if ( ! ( f = fopen( file, "w" ) ) ) |
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236 { |
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237 Log_err( "Could not open %s for writing (%s)", |
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238 file, strerror( errno ) ); |
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239 return; |
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240 } |
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241 fprintf( f, "%lu\n", t ); |
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242 fclose( f ); |
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243 } |
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244 |
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245 Bool |
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246 Utl_getStamp( time_t *result, Str file ) |
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247 { |
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248 FILE *f; |
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249 |
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250 if ( ! ( f = fopen( file, "r" ) ) ) |
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251 return FALSE; |
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252 if ( fscanf( f, "%lu", result ) != 1 ) |
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253 { |
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254 Log_err( "File %s corrupted", file ); |
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255 fclose( f ); |
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256 return FALSE; |
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257 } |
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258 fclose( f ); |
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259 return TRUE; |
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260 } |
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261 |
91 | 262 static const char *DOTW[] = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", |
263 "Sat", NULL }; | |
264 static const char *MON[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", | |
265 "Aug", "Sep", "Oct", "Nov", "Dec", NULL }; | |
266 | |
127 | 267 /* |
268 * Calculate the difference between local time and GMT. This is INN's | |
269 * 'always-works' method. It assumes the time differences is < 24hrs. | |
270 * Sounds reasonable to me. It also assumes it can ignore seconds. | |
271 * Returns GMT - localtime minutes. It will also trash the localtime/ | |
272 * gmtime/etc. static buffer. | |
273 */ | |
274 static int | |
275 tzDiff( void ) | |
276 { | |
277 time_t now; | |
278 struct tm local, gmt, *tm; | |
279 static time_t nextCalc = 0; | |
280 static int res = 0; | |
281 | |
282 now = time( NULL ); | |
283 if ( now < nextCalc ) | |
284 return res; | |
285 | |
286 tm = localtime( &now ); | |
287 if ( tm == NULL ) | |
288 return 0; | |
289 local = *tm; | |
290 tm = gmtime( &now ); | |
291 if ( tm == NULL ) | |
292 return 0; | |
293 gmt = *tm; | |
294 | |
295 res = gmt.tm_yday - local.tm_yday; | |
296 if ( res < -1 ) | |
297 res = -1; /* Year rollover? */ | |
298 else if ( res > 1 ) | |
299 res = 1; | |
300 | |
301 res *= 24; | |
302 res += gmt.tm_hour - local.tm_hour; | |
303 res *= 60; | |
304 res += gmt.tm_min - local.tm_min; | |
305 | |
306 /* Need to recalc at start of next hour */ | |
307 nextCalc = now + ( 60 - local.tm_sec ) + 60 * ( 59 - local.tm_min ); | |
308 | |
309 return res; | |
310 } | |
311 | |
43
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312 void |
91 | 313 Utl_newsDate( time_t t, Str res ) |
314 { | |
127 | 315 struct tm *local; |
316 long tzdiff, hoffset, moffset; | |
317 | |
318 tzdiff = - tzDiff(); | |
91 | 319 |
127 | 320 local = localtime( &t ); |
321 if ( local == NULL ) | |
322 { | |
323 Utl_cpyStr( res, "** localtime failure **" ); | |
324 return; | |
325 } | |
326 | |
91 | 327 hoffset = tzdiff / 60; |
328 moffset = tzdiff % 60; | |
127 | 329 if ( moffset < 0 ) |
330 moffset = - moffset; | |
91 | 331 |
127 | 332 sprintf( res, "%s, %d %s %4d %02d:%02d:%02d %+03ld%02ld", |
333 DOTW[local->tm_wday], local->tm_mday, | |
334 MON[local->tm_mon], local->tm_year + 1900, | |
335 local->tm_hour, local->tm_min, local->tm_sec, | |
91 | 336 hoffset, moffset ); |
337 } | |
338 | |
339 time_t | |
340 Utl_parseNewsDate( const char *s ) | |
43
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341 { |
91 | 342 struct tm tm; |
127 | 343 int wday, offset, tzoffset; |
91 | 344 char *p; |
345 time_t res; | |
346 | |
347 memset( &tm, 0, sizeof( tm ) ); | |
348 wday = -1; | |
127 | 349 tm.tm_isdst = -1; |
91 | 350 |
351 s = nextNonWhiteSpace( s ); | |
352 | |
353 /* Is this the day number, or a weekday? */ | |
354 if ( ! isdigit( *s ) ) | |
355 { | |
356 if ( strlen( s ) < 4 ) | |
357 return (time_t) -1; | |
358 | |
359 for ( wday = 0; DOTW[ wday ] != NULL; wday++ ) | |
186 | 360 if ( strncasecmp( DOTW[ wday ], s, 3 ) == 0 ) |
91 | 361 break; |
362 | |
363 if( DOTW[ wday ] == NULL || s[3] != ',' ) | |
364 return (time_t) -1; | |
365 | |
366 s += 4; | |
367 } | |
368 | |
369 /* Get the day number */ | |
370 tm.tm_mday = (int) strtol( s, &p, 10 ); | |
371 if ( p == s ) | |
372 return (time_t) -1; | |
373 s = p; | |
374 | |
375 /* Look for month name */ | |
376 s = nextNonWhiteSpace( s ); | |
377 if ( strlen( s ) < 4 ) | |
378 return (time_t) -1; | |
379 for ( tm.tm_mon = 0; MON[ tm.tm_mon ] != NULL; tm.tm_mon++ ) | |
186 | 380 if ( strncasecmp( MON[ tm.tm_mon ], s, 3 ) == 0 ) |
91 | 381 break; |
382 | |
383 if ( MON[ tm.tm_mon ] == NULL ) | |
384 return (time_t) -1; | |
385 s += 3; | |
386 | |
387 /* Year next */ | |
388 tm.tm_year = (int) strtol( s, &p, 10 ); | |
389 if ( p == s || ( tm.tm_year >= 100 && tm.tm_year < 1900 ) ) | |
390 return (time_t) -1; | |
391 if ( tm.tm_year >= 1900 ) | |
392 tm.tm_year -= 1900; | |
393 s = p; | |
394 | |
395 /* Hours */ | |
396 tm.tm_hour = (int) strtol( s, &p, 10 ); | |
397 if ( p == s || *p != ':' ) | |
398 return (time_t) -1; | |
399 s = ++p; | |
400 | |
401 /* Minutes */ | |
402 tm.tm_min = (int) strtol( s, &p, 10 ); | |
403 if ( p == s || ( *p != ':' && *p != ' ' ) ) | |
404 return (time_t) -1; | |
405 s = p; | |
406 | |
407 /* Seconds */ | |
408 if ( *s == ':' ) | |
409 { | |
410 s++; | |
411 tm.tm_sec = (int) strtol( s, &p, 10 ); | |
412 if ( p == s ) | |
413 return (time_t) -1; | |
414 s = p; | |
415 } | |
416 | |
417 /* GMT/UT or timezone offset */ | |
418 tzoffset = 0; | |
419 while ( isspace( *s ) ) | |
420 s++; | |
186 | 421 if ( strncasecmp( s, "GMT", 3) == 0 ) |
91 | 422 s += 3; |
186 | 423 else if ( strncasecmp( s, "UT", 2 ) == 0 ) |
91 | 424 s += 2; |
425 else | |
426 { | |
127 | 427 offset = (int) strtol( s, &p, 10 ); |
91 | 428 s = p; |
127 | 429 tzoffset = ( offset / 100 ) * 60 + ( offset % 100 ); |
91 | 430 } |
431 | |
432 /* Check for following junk */ | |
433 if ( *s != '\0' && ! isspace( *s ) ) | |
434 return (time_t) -1; | |
435 | |
436 res = mktime( &tm ); | |
437 if ( res == (time_t) -1 ) | |
438 return res; | |
439 | |
440 if ( wday >= 0 && wday != tm.tm_wday ) | |
441 return (time_t) -1; | |
442 | |
127 | 443 /* Remove local time diff from res to give time as if GMT */ |
444 res -= tzDiff() * 60; | |
445 | |
446 /* And now adjust for tzoffset */ | |
447 res -= tzoffset * 60; | |
448 | |
91 | 449 return res; |
43
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450 } |
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451 |
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452 void |
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453 Utl_allocAndCpy( char **dst, const char *src ) |
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454 { |
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455 int len = strlen( src ); |
45
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456 if ( ! ( *dst = malloc( (size_t)len + 1 ) ) ) |
43
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457 { |
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458 Log_err( "Cannot allocate string with length %lu", strlen( src ) ); |
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459 exit( EXIT_FAILURE ); |
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460 } |
45
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461 memcpy( *dst, src, (size_t)len + 1 ); |
43
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462 } |
91 | 463 |
164
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464 sig_t |
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465 Utl_installSignalHandler( int sig, sig_t handler ) |
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466 { |
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467 struct sigaction act, oldAct; |
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468 |
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469 act.sa_handler = handler; |
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470 sigemptyset( &act.sa_mask ); |
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471 act.sa_flags = 0; |
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472 if ( sig != SIGALRM ) |
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473 act.sa_flags |= SA_RESTART; |
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474 if ( sigaction( sig, &act, &oldAct ) < 0 ) |
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475 return SIG_ERR; |
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476 return oldAct.sa_handler; |
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477 } |
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478 |
91 | 479 #if defined(UTIL_TEST) |
480 | |
481 /* Test code borrowed from wildmat.c. Yep, still uses gets(). */ | |
482 extern char *gets(); | |
483 | |
484 int | |
485 main() | |
486 { | |
487 Str line; | |
488 time_t t; | |
489 | |
490 printf( "Util date tester. Enter date to test.\n" ); | |
491 printf( "A blank line exits the program.\n" ); | |
492 | |
493 for ( ; ; ) | |
494 { | |
127 | 495 t = time( NULL ); |
496 Utl_newsDate( t, line ); | |
497 printf( "\n(%s) Enter date: ", line ); | |
91 | 498 (void) fflush( stdout ); |
499 if ( gets( line ) == NULL || line[0] == '\0' ) | |
500 break; | |
501 | |
502 t = Utl_parseNewsDate( line ); | |
503 if ( t == (time_t) -1 ) | |
504 printf( "Date parse failed\n" ); | |
505 else | |
506 { | |
507 Utl_newsDate( t, line ); | |
127 | 508 printf( "Utl_newsDate -> '%s'\n", line ); |
91 | 509 } |
510 } | |
511 | |
512 exit(0); | |
513 /* NOTREACHED */ | |
514 } | |
515 #endif |