Mercurial > noffle
annotate src/filter.c @ 185:fed1334d766b noffle
[svn] * src/client.c: Change variable only used on constant to 'const'.
* src/filter.c: Add a couple of 'return's after ASSERT() to remove
compiler warnings about functions needing returns.
* NEWS,TODO,configure,configure.in,noffle.conf.example,docs/NOTES,
docs/noffle.conf.5,src/client.c,src/configfile.c,src/content.c,
src/control.c,src/database.c,src/fetch.c,src/fetchlist.c,src/filter.c,
src/group.c,src/lock.c,src/log.c,src/log.h,src/noffle.c,src/outgoing.c,
src/post.c,src/protocol.c,src/request.c,src/server.c,src/util.c:
Debug logging is always compiled and selected via noffle.conf. All debug
logs are classified as all, none, config, control, expire, fetch,
filter, newsbase, noffle, post, protocol, requests and server.
| author | bears |
|---|---|
| date | Sun, 05 Aug 2001 09:24:22 +0100 |
| parents | 8897b7e3b108 |
| children | a4e9a20e50e5 |
| rev | line source |
|---|---|
| 128 | 1 /* |
| 2 filter.c | |
| 3 | |
| 4 Article filtering. | |
| 5 | |
|
185
fed1334d766b
[svn] * src/client.c: Change variable only used on constant to 'const'.
bears
parents:
128
diff
changeset
|
6 $Id: filter.c 300 2001-08-05 08:24:22Z bears $ |
| 128 | 7 */ |
| 8 | |
| 9 #if HAVE_CONFIG_H | |
| 10 #include <config.h> | |
| 11 #endif | |
| 12 | |
| 13 #include "filter.h" | |
| 14 | |
| 15 #include <ctype.h> | |
| 16 #include "common.h" | |
| 17 #include "itemlist.h" | |
| 18 #include "log.h" | |
| 19 #include "wildmat.h" | |
| 20 | |
| 21 struct | |
| 22 { | |
| 23 int nFilters; | |
| 24 int maxFilters; | |
| 25 const Filter **filters; | |
| 26 Bool needGroups; | |
| 27 } filter = { 0, 0, NULL, FALSE }; | |
| 28 | |
| 29 static unsigned long | |
| 30 countGroups( const char *grps ) | |
| 31 { | |
| 32 unsigned long res; | |
| 33 | |
| 34 res = 1; | |
| 35 while ( *grps != '\0' ) | |
| 36 { | |
| 37 if ( *grps == ',' ) | |
| 38 res++; | |
| 39 grps++; | |
| 40 } | |
| 41 | |
| 42 return res; | |
| 43 } | |
| 44 static unsigned long | |
| 45 countRefs( const char *refs ) | |
| 46 { | |
| 47 unsigned long res; | |
| 48 Bool inRef; | |
| 49 | |
| 50 res = 0; | |
| 51 inRef = FALSE; | |
| 52 | |
| 53 while ( *refs != '\0' ) | |
| 54 { | |
| 55 if ( inRef ) | |
| 56 { | |
| 57 if ( *refs == '>' ) | |
| 58 { | |
| 59 inRef = FALSE; | |
| 60 res++; | |
| 61 } | |
| 62 } | |
| 63 else if ( *refs == '<' ) | |
| 64 inRef = TRUE; | |
| 65 refs++; | |
| 66 } | |
| 67 | |
| 68 return res; | |
| 69 } | |
| 70 | |
| 71 /* Check a single rule to see if it passes. */ | |
| 72 static Bool | |
| 73 checkRule( const char *thisGrp, const char *newsgroups, | |
| 74 const Over *ov, const FilterRule *r ) | |
| 75 { | |
| 76 unsigned long ul; | |
| 77 ItemList *grps; | |
| 78 const char *p; | |
| 79 | |
| 80 switch( r->type ) | |
| 81 { | |
| 82 case RULE_NEWSGROUP: | |
| 83 if ( Wld_match( thisGrp, r->data.grp ) ) | |
| 84 return TRUE; | |
| 85 if ( newsgroups != NULL ) | |
| 86 { | |
| 87 grps = new_Itl( newsgroups, " ,\t" ); | |
| 88 for ( p = Itl_first( grps ); p != NULL; p = Itl_next( grps ) ) | |
| 89 if ( Wld_match( p, r->data.grp ) ) | |
| 90 return TRUE; | |
| 91 del_Itl( grps ); | |
| 92 } | |
| 93 return FALSE; | |
| 94 | |
| 95 case RULE_SUBJECT: | |
| 96 return ( regexec( &r->data.regex, Ov_subj( ov ), 0, NULL, 0 ) == 0 ); | |
| 97 | |
| 98 case RULE_FROM: | |
| 99 return ( regexec( &r->data.regex, Ov_from( ov ), 0, NULL, 0 ) == 0 ); | |
| 100 | |
| 101 case RULE_BYTES_LT: | |
| 102 return ( Ov_bytes( ov ) < r->data.amount ); | |
| 103 | |
| 104 case RULE_BYTES_EQ: | |
| 105 return ( Ov_bytes( ov ) == r->data.amount ); | |
| 106 | |
| 107 case RULE_BYTES_GT: | |
| 108 return ( Ov_bytes( ov ) > r->data.amount ); | |
| 109 | |
| 110 case RULE_LINES_LT: | |
| 111 return ( Ov_lines( ov ) < r->data.amount ); | |
| 112 | |
| 113 case RULE_LINES_EQ: | |
| 114 return ( Ov_lines( ov ) == r->data.amount ); | |
| 115 | |
| 116 case RULE_LINES_GT: | |
| 117 return ( Ov_lines( ov ) > r->data.amount ); | |
| 118 | |
| 119 case RULE_MSGID: | |
| 120 return ( regexec( &r->data.regex, Ov_msgId( ov ), 0, NULL, 0 ) == 0 ); | |
| 121 | |
| 122 case RULE_NOREFS_LT: | |
| 123 ul = countRefs( Ov_ref( ov ) ); | |
| 124 return ( ul < r->data.amount ); | |
| 125 | |
| 126 case RULE_NOREFS_EQ: | |
| 127 ul = countRefs( Ov_ref( ov ) ); | |
| 128 return ( ul == r->data.amount ); | |
| 129 | |
| 130 case RULE_NOREFS_GT: | |
| 131 ul = countRefs( Ov_ref( ov ) ); | |
| 132 return ( ul > r->data.amount ); | |
| 133 | |
| 134 case RULE_XPOSTS_LT: | |
| 135 if ( newsgroups == NULL ) | |
| 136 return FALSE; | |
| 137 ul = countGroups( newsgroups ); | |
| 138 return ( ul < r->data.amount ); | |
| 139 | |
| 140 case RULE_XPOSTS_EQ: | |
| 141 if ( newsgroups == NULL ) | |
| 142 return FALSE; | |
| 143 ul = countGroups( newsgroups ); | |
| 144 return ( ul == r->data.amount ); | |
| 145 | |
| 146 case RULE_XPOSTS_GT: | |
| 147 if ( newsgroups == NULL ) | |
| 148 return FALSE; | |
| 149 ul = countGroups( newsgroups ); | |
| 150 return ( ul > r->data.amount ); | |
| 151 } | |
| 152 | |
| 153 ASSERT( FALSE ); /* Shouldn't get here */ | |
|
185
fed1334d766b
[svn] * src/client.c: Change variable only used on constant to 'const'.
bears
parents:
128
diff
changeset
|
154 return 0; /* Keep compiler quiet */ |
| 128 | 155 } |
| 156 | |
| 157 /* Check a single filter to see if it fires. */ | |
| 158 static Bool | |
| 159 checkFilter( const char *thisGrp, const char *newsgroups, | |
| 160 const Over *ov, const Filter *f ) | |
| 161 { | |
| 162 int i; | |
| 163 | |
| 164 for ( i = 0; i < f->nRules; i++ ) | |
| 165 if ( ! checkRule( thisGrp, newsgroups, ov, &f->rules[i] ) ) | |
| 166 return FALSE; | |
| 167 | |
| 168 return TRUE; | |
| 169 } | |
| 170 | |
| 171 /* Add a filter to the list of filters. */ | |
| 172 void | |
| 173 Flt_addFilter( const Filter *f ) | |
| 174 { | |
| 175 ASSERT( f != NULL ); | |
| 176 | |
| 177 if ( ( filter.nFilters + 1 ) > filter.maxFilters ) | |
| 178 { | |
| 179 filter.filters = | |
| 180 ( const Filter ** ) realloc( filter.filters, | |
| 181 ( filter.maxFilters + 5 ) | |
| 182 * sizeof( Filter * ) ); | |
| 183 if ( filter.filters == NULL ) | |
| 184 { | |
| 185 Log_err( "Could not realloc filter list" ); | |
| 186 exit( EXIT_FAILURE ); | |
| 187 } | |
| 188 filter.maxFilters += 5; | |
| 189 } | |
| 190 filter.filters[ filter.nFilters++ ] = f; | |
| 191 } | |
| 192 | |
| 193 /* | |
| 194 * Run the rules over the supplied overview. If a specific rule fires, | |
| 195 * returns its action. If no rule fires, return the default read mode. | |
| 196 */ | |
| 197 FilterAction | |
| 198 Flt_checkFilters( const char *thisGrp, const char *newsgroups, | |
| 199 const Over *ov, FetchMode mode ) | |
| 200 { | |
| 201 int i; | |
| 202 | |
| 203 for ( i = 0; i < filter.nFilters; i++ ) | |
| 204 if ( checkFilter( thisGrp, newsgroups, ov, filter.filters[ i ] ) ) | |
| 205 { | |
|
185
fed1334d766b
[svn] * src/client.c: Change variable only used on constant to 'const'.
bears
parents:
128
diff
changeset
|
206 Log_dbg( LOG_DBG_FILTER, |
|
fed1334d766b
[svn] * src/client.c: Change variable only used on constant to 'const'.
bears
parents:
128
diff
changeset
|
207 "Filter %d fired on message %s", |
|
fed1334d766b
[svn] * src/client.c: Change variable only used on constant to 'const'.
bears
parents:
128
diff
changeset
|
208 i, Ov_msgId( ov ) ); |
| 128 | 209 return filter.filters[ i ]->action; |
| 210 } | |
| 211 | |
| 212 switch( mode ) | |
| 213 { | |
| 214 case FULL: return FILTER_FULL; | |
| 215 case THREAD: return FILTER_THREAD; | |
| 216 case OVER: return FILTER_XOVER; | |
| 217 } | |
| 218 | |
| 219 ASSERT( FALSE ); /* Shouldn't get here */ | |
|
185
fed1334d766b
[svn] * src/client.c: Change variable only used on constant to 'const'.
bears
parents:
128
diff
changeset
|
220 return FILTER_FULL; /* Keep compiler quiet */ |
| 128 | 221 } |
| 222 | |
| 223 Filter * | |
| 224 new_Filter( void ) | |
| 225 { | |
| 226 Filter *f; | |
| 227 | |
| 228 if ( ! ( f = ( Filter * ) malloc( sizeof( Filter ) ) ) ) | |
| 229 { | |
| 230 Log_err( "Cannot allocate Filter" ); | |
| 231 exit( EXIT_FAILURE ); | |
| 232 } | |
| 233 f->nRules = 0; | |
| 234 f->maxRules = 0; | |
| 235 f->rules = NULL; | |
| 236 f->action = FILTER_FULL; | |
| 237 return f; | |
| 238 } | |
| 239 | |
| 240 void | |
| 241 del_Filter( Filter *f ) | |
| 242 { | |
| 243 if ( f == NULL ) | |
| 244 return; | |
| 245 | |
| 246 if ( f->rules != NULL ) | |
| 247 free( f->rules ); | |
| 248 free( f ); | |
| 249 } | |
| 250 | |
| 251 FilterAction | |
| 252 Flt_action( const Filter *f ) | |
| 253 { | |
| 254 return f->action; | |
| 255 } | |
| 256 | |
| 257 int | |
| 258 Flt_nRules( const Filter *f ) | |
| 259 { | |
| 260 return f->nRules; | |
| 261 } | |
| 262 | |
| 263 /* | |
| 264 * Do we have a rule requiring us to fetch the Newsgroups: headers of | |
| 265 * articles? | |
| 266 */ | |
| 267 Bool | |
| 268 Flt_getNewsgroups( void ) | |
| 269 { | |
| 270 return filter.needGroups; | |
| 271 } | |
| 272 | |
| 273 FilterRule | |
| 274 Flt_rule( const Filter *f, int ruleNo ) | |
| 275 { | |
| 276 ASSERT( ruleNo < f->nRules ); | |
| 277 return f->rules[ ruleNo ]; | |
| 278 } | |
| 279 | |
| 280 void | |
| 281 Flt_setAction( Filter *f, FilterAction action ) | |
| 282 { | |
| 283 f->action = action; | |
| 284 } | |
| 285 | |
| 286 void | |
| 287 Flt_addRule( Filter *f, FilterRule rule ) | |
| 288 { | |
| 289 /* Does the rule require Newsgroups: headers to be fetched? */ | |
| 290 if ( rule.type == RULE_NEWSGROUP || | |
| 291 ( rule.type >= RULE_XPOSTS_LT && rule.type <= RULE_XPOSTS_GT ) ) | |
| 292 filter.needGroups = TRUE; | |
| 293 | |
| 294 if ( f->nRules + 1 > f->maxRules ) | |
| 295 { | |
| 296 f->rules = | |
| 297 ( FilterRule * ) realloc( f->rules, | |
| 298 ( f->maxRules + 5 ) | |
| 299 * sizeof( FilterRule ) ); | |
| 300 | |
| 301 if ( f->rules == NULL ) | |
| 302 { | |
| 303 Log_err( "Could not realloc rule list" ); | |
| 304 exit( EXIT_FAILURE ); | |
| 305 } | |
| 306 f->maxRules += 5; | |
| 307 } | |
| 308 f->rules[ f->nRules++ ] = rule; | |
| 309 } | |
| 310 | |
| 311 |