annotate src/filter.h @ 278:a0497ffac49b noffle

[svn] I'm not very good at automake. Redo with automake2.13.
author bears
date Sun, 10 Nov 2002 18:49:41 +0000
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1 /*
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2 filter.h
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3
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4 Article filtering.
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5
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6 $Id: filter.h 381 2002-05-14 14:25:45Z mirkol $
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7 */
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8
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9 #ifndef FILTER_H
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10 #define FILTER_H
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11
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12 #include <sys/types.h>
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13 #include <regex.h>
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14 #include "fetchlist.h"
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15 #include "over.h"
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16
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17 /* The possible actions in a filter. */
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18 typedef enum {
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19 FILTER_FULL,
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20 FILTER_XOVER,
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21 FILTER_THREAD,
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22 FILTER_DISCARD,
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23 FILTER_DEFAULT
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24 } FilterAction;
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25
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26 /* Representation of a rule. */
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27 typedef enum {
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28 RULE_NEWSGROUP, /* Wildmat data */
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29 RULE_SUBJECT, /* Regex data */
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30 RULE_REFERENCE,
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31 RULE_FROM,
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32 RULE_MSGID,
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33 RULE_BYTES_LT, RULE_BYTES_EQ, RULE_BYTES_GT, /* Number data */
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34 RULE_LINES_LT, RULE_LINES_EQ, RULE_LINES_GT,
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35 RULE_NOREFS_LT, RULE_NOREFS_EQ, RULE_NOREFS_GT,
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36 RULE_XPOSTS_LT, RULE_XPOSTS_EQ, RULE_XPOSTS_GT,
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37 RULE_DATE_LT, RULE_DATE_EQ, RULE_DATE_GT,
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38 RULE_POST_STATUS /* 'y','n','m' */
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39 } FilterRuleType;
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40
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41 /* Data for Date: header parsing. */
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42
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43 #define RULE_DATE_EQ_PRECISION ((time_t) (24*60*60)) /* +/- 24 hours precision */
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44
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45 typedef enum {
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46 NOW, /* beginning of fetch */
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47 LASTUPDATE, /* of last fetch */
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48 INVALID, /* invalid dates, only RULE_DATE_EQ */
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49 FIXED /* fixed time */
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50 } FilterRuleDateEnumType;
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51
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52 typedef struct {
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53 time_t calctime; /* calctime = vartime + timeoffset */
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54 time_t timeoffset;
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55 FilterRuleDateEnumType vartime;
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56 } FilterRuleDateType;
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57
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58
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59 typedef union {
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60 regex_t regex;
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61 unsigned long amount;
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62 char *grp;
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63 char postAllow; /* 'y','n','m' */
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64 FilterRuleDateType reftime;
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65 } FilterRuleData;
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66
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67 typedef struct {
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68 FilterRuleType type;
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69 FilterRuleData data;
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70 } FilterRule;
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71
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72 /* A single filter is a collection of rules with an action. */
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73 typedef struct {
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74 int nRules;
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75 int maxRules;
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76 FilterRule *rules;
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77 FilterAction action;
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78 } Filter;
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79
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80 /* Add a filter to the list of filters. */
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81 void
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82 Flt_addFilter( const Filter *f );
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83
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85 /*
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86 * Called by client.c once before processing a batch of overviews
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87 * with Flt_checkFilters().
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88 */
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89 void
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90 Flt_init( const char *filename );
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91
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92 /*
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93 * Run the rules over the supplied overview. If a specific rule fires,
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94 * returns its action. If no rule fires, return the default read mode.
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95 */
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96 FilterAction
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97 Flt_checkFilters( const char *thisGrp, const char *newsgroups,
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98 const Over *ov, FetchMode mode );
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99
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100 /*
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101 * Build and access a filter
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102 */
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103 Filter *
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104 new_Filter( void );
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105
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106 void
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107 del_Filter( Filter *f );
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108
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109 FilterAction
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110 Flt_action( const Filter *f );
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111
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112 int
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113 Flt_nRules( const Filter *f );
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114
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115 Bool
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116 Flt_getNewsgroups( void );
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117
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118 FilterRule
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119 Flt_rule( const Filter *f, int ruleNo );
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120
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121 void
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122 Flt_setAction( Filter *f, FilterAction action );
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123
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124 void
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125 Flt_addRule( Filter *f, FilterRule rule );
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126
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127 #endif /* FILTER_H */