Mercurial > noffle
annotate src/content.c @ 58:b4e6f7f96135 noffle
[svn] Add some intermediate variables for easier debugging in needsMark().
It seems that thread mode is sometimes not working.
Changed some variable types and used some casts to avoid compiler
warnings about signedness. In general, int should be used for parameters
for allowing a signedness assertion in the function.
author | enz |
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date | Fri, 12 May 2000 17:52:07 +0100 (2000-05-12) |
parents | 125d79c9e586 |
children | e612b263934f |
rev | line source |
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43
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1 /* |
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2 content.c |
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3 |
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4 $Id: content.c 60 2000-05-09 22:28:38Z uh1763 $ |
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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 #include <stdio.h> |
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12 #include <dirent.h> |
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13 #include <fcntl.h> |
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14 #include <sys/types.h> |
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15 #include <sys/stat.h> |
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16 #include <unistd.h> |
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17 #include "common.h" |
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18 #include "configfile.h" |
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19 #include "group.h" |
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20 #include "log.h" |
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21 #include "over.h" |
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22 #include "pseudo.h" |
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23 #include "util.h" |
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24 #include "content.h" |
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25 #include "portable.h" |
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26 |
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27 struct |
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28 { |
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29 DIR *dir; /* Directory for browsing through all |
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30 groups */ |
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31 int vecFirst; /* First article number in vector */ |
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32 int first; /* First live article number */ |
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33 int last; /* Last article number */ |
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34 unsigned int size; /* Number of overviews. */ |
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35 unsigned int max; /* Size of elem. */ |
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36 Over **elem; /* Ptr to array with ptrs to overviews. |
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37 NULL entries for non-existing article numbers |
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38 in group. */ |
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39 Str name; |
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40 Str file; |
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41 } cont = { NULL, 1, 1, 0, 0, 0, NULL, "", "" }; |
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42 |
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43 void |
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44 Cont_app( Over *ov ) |
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45 { |
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46 if ( cont.max < cont.size + 1 ) |
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47 { |
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48 if ( ! ( cont.elem = realloc( cont.elem, |
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49 ( cont.max + 500 ) |
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50 * sizeof( cont.elem[ 0 ] ) ) ) ) |
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51 { |
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52 Log_err( "Could not realloc overview list" ); |
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53 exit( EXIT_FAILURE ); |
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54 } |
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55 cont.max += 500; |
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56 } |
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57 ASSERT( cont.vecFirst > 0 ); |
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58 if ( ov ) |
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59 Ov_setNumb( ov, cont.vecFirst + cont.size ); |
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60 cont.elem[ cont.size++ ] = ov; |
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61 cont.last = cont.vecFirst + cont.size - 1; |
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62 } |
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63 |
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64 Bool |
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65 Cont_validNumb( int n ) |
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66 { |
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67 return ( n != 0 && n >= cont.first && n <= cont.last |
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68 && cont.elem[ n - cont.vecFirst ] ); |
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69 } |
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70 |
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71 void |
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72 Cont_delete( int n ) |
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73 { |
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74 Over **ov; |
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75 |
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76 if ( ! Cont_validNumb( n ) ) |
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77 return; |
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78 ov = &cont.elem[ n - cont.vecFirst ]; |
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79 free( *ov ); |
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80 *ov = NULL; |
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81 } |
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82 |
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83 /* Remove all overviews from content. */ |
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84 static void |
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85 clearCont( void ) |
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86 { |
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87 int i; |
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88 |
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89 for ( i = 0; i < cont.size; ++i ) |
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90 del_Over( cont.elem[ i ] ); |
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91 cont.size = 0; |
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92 } |
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93 |
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94 static void |
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95 setupEmpty( const char *name ) |
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96 { |
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97 cont.last = Grp_last( name ); |
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98 cont.first = cont.vecFirst = cont.last + 1; |
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99 ASSERT( cont.first > 0 ); |
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100 } |
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101 |
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102 /* Extend content list to size "cnt" and append NULL entries. */ |
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103 static void |
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104 extendCont( int cnt ) |
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105 { |
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106 int i, n; |
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107 |
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108 if ( cont.size < cnt ) |
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109 { |
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110 n = cnt - cont.size; |
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111 for ( i = 0; i < n; ++i ) |
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112 Cont_app( NULL ); |
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113 } |
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114 } |
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115 |
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116 /* Discard all cached overviews, and read in the overviews of a new group |
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117 from its overviews file. */ |
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118 void |
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119 Cont_read( const char *name ) |
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120 { |
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121 FILE *f; |
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122 Over *ov; |
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123 int numb; |
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124 Str line; |
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125 |
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126 /* Delete old overviews and make room for new ones. */ |
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127 cont.vecFirst = 0; |
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128 cont.first = 0; |
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129 cont.last = 0; |
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130 Utl_cpyStr( cont.name, name ); |
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131 clearCont(); |
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132 |
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133 /* read overviews from overview file and store them in the overviews |
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134 list */ |
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135 snprintf( cont.file, MAXCHAR, "%s/overview/%s", Cfg_spoolDir(), name ); |
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136 f = fopen( cont.file, "r" ); |
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137 if ( ! f ) |
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138 { |
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139 Log_dbg( "No group overview file: %s", cont.file ); |
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140 setupEmpty( name ); |
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141 return; |
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142 } |
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143 Log_dbg( "Reading %s", cont.file ); |
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144 while ( fgets( line, MAXCHAR, f ) ) |
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145 { |
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146 if ( ! ( ov = Ov_read( line ) ) ) |
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147 { |
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148 Log_err( "Overview corrupted in %s: %s", name, line ); |
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149 continue; |
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150 } |
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151 numb = Ov_numb( ov ); |
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152 if ( numb < cont.first ) |
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153 { |
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154 Log_err( "Wrong ordering in %s: %s", name, line ); |
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155 continue; |
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156 } |
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157 if ( cont.first == 0 ) |
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158 cont.first = cont.vecFirst = numb; |
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159 cont.last = numb; |
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160 extendCont( numb - cont.first + 1 ); |
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161 cont.elem[ numb - cont.first ] = ov; |
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162 } |
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163 fclose( f ); |
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164 |
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165 if ( cont.first == 0 ) |
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166 setupEmpty( name ); /* Corrupt overview file recovery */ |
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167 } |
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168 |
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169 void |
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170 Cont_write( void ) |
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171 { |
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172 Bool anythingWritten; |
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173 int i; |
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174 FILE *f; |
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175 const Over *ov; |
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176 |
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177 /* Save the overview */ |
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178 if ( ! ( f = fopen( cont.file, "w" ) ) ) |
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179 { |
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180 Log_err( "Could not open %s for writing", cont.file ); |
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181 return; |
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182 } |
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183 Log_dbg( "Writing %s (%lu)", cont.file, cont.size ); |
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184 anythingWritten = FALSE; |
49 | 185 cont.first = -1; |
43
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186 for ( i = 0; i < cont.size; ++i ) |
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187 { |
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188 if ( ( ov = cont.elem[ i ] ) ) |
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189 { |
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190 if ( ! Pseudo_isGeneralInfo( Ov_msgId( ov ) ) ) |
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191 { |
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192 if ( ! Ov_write( ov, f ) ) |
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193 { |
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194 Log_err( "Writing of overview line failed" ); |
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195 break; |
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196 } |
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197 else |
49 | 198 { |
43
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199 anythingWritten = TRUE; |
49 | 200 if ( cont.first < 0 ) |
201 cont.first = cont.vecFirst + i; | |
202 } | |
43
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203 } |
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204 } |
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205 } |
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206 fclose( f ); |
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207 |
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208 /* |
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209 If empty, remove the overview file and set set first to one |
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210 beyond last to flag said emptiness. |
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211 */ |
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212 if ( ! anythingWritten ) |
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213 { |
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214 unlink( cont.file ); |
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215 cont.first = cont.last + 1; |
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216 } |
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217 } |
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218 |
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219 const Over * |
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220 Cont_get( int numb ) |
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221 { |
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222 if ( ! Cont_validNumb( numb ) ) |
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223 return NULL; |
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224 return cont.elem[ numb - cont.vecFirst ]; |
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225 } |
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226 |
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227 int |
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228 Cont_first( void ) { return cont.first; } |
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229 |
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230 int |
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231 Cont_last( void ) { return cont.last; } |
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232 |
49 | 233 int |
234 Cont_find( const char *msgId ) | |
235 { | |
236 int i; | |
237 const Over *ov; | |
238 | |
239 for ( i = 0; i < cont.size; i++ ) | |
240 { | |
241 if ( ( ov = cont.elem[ i ] ) | |
242 && strcmp( Ov_msgId( ov ), msgId ) == 0 ) | |
243 return i + cont.vecFirst; | |
244 } | |
245 | |
246 return -1; | |
247 } | |
248 | |
43
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249 const char * |
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250 Cont_grp( void ) { return cont.name; } |
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251 |
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252 Bool |
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253 Cont_nextGrp( Str result ) |
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254 { |
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255 struct dirent *d; |
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256 |
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257 ASSERT( cont.dir ); |
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258 if ( ! ( d = readdir( cont.dir ) ) ) |
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259 { |
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260 cont.dir = NULL; |
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261 return FALSE; |
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262 } |
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263 if ( ! d->d_name ) |
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264 return FALSE; |
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265 Utl_cpyStr( result, d->d_name ); |
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266 result[ MAXCHAR - 1 ] = '\0'; |
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267 return TRUE; |
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268 } |
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269 |
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270 Bool |
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271 Cont_firstGrp( Str result ) |
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272 { |
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273 Str name; |
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274 |
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275 snprintf( name, MAXCHAR, "%s/overview", Cfg_spoolDir() ); |
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276 if ( ! ( cont.dir = opendir( name ) ) ) |
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277 { |
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278 Log_err( "Cannot open %s", name ); |
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279 return FALSE; |
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280 } |
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281 Cont_nextGrp( result ); /* "." */ |
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282 Cont_nextGrp( result ); /* ".." */ |
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283 return Cont_nextGrp( result ); |
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284 } |