Mercurial > hg > octave-kai > gnulib-hg
annotate lib/getdate.y @ 16:01c6d40adf9d
Make tables static and const when possible.
getdate.c (getdate_yyerr, getdate_yylex): Declare these functions static.
| author | Jim Meyering <jim@meyering.net> |
|---|---|
| date | Thu, 12 Nov 1992 04:13:46 +0000 |
| parents | f8dce34b5ab0 |
| children | e5f368fdc8c2 |
| rev | line source |
|---|---|
| 9 | 1 %{ |
|
16
01c6d40adf9d
Make tables static and const when possible.
Jim Meyering <jim@meyering.net>
parents:
9
diff
changeset
|
2 /* $Revision: 1.1.1.1 $ |
| 9 | 3 ** |
| 4 ** Originally written by Steven M. Bellovin <smb@research.att.com> while | |
| 5 ** at the University of North Carolina at Chapel Hill. Later tweaked by | |
| 6 ** a couple of people on Usenet. Completely overhauled by Rich $alz | |
| 7 ** <rsalz@bbn.com> and Jim Berets <jberets@bbn.com> in August, 1990; | |
| 8 ** send any email to Rich. | |
| 9 ** | |
| 10 ** This grammar has eight shift/reduce conflicts. | |
| 11 ** | |
| 12 ** This code is in the public domain and has no copyright. | |
| 13 */ | |
| 14 /* SUPPRESS 287 on yaccpar_sccsid *//* Unusd static variable */ | |
| 15 /* SUPPRESS 288 on yyerrlab *//* Label unused */ | |
| 16 | |
| 17 #ifdef __GNUC__ | |
| 18 #define alloca __builtin_alloca | |
| 19 #else | |
| 20 #ifdef sparc | |
| 21 #include <alloca.h> | |
| 22 #else | |
| 23 #ifdef _AIX /* for Bison */ | |
| 24 #pragma alloca | |
| 25 #else | |
| 26 char *alloca (); | |
| 27 #endif | |
| 28 #endif | |
| 29 #endif | |
| 30 | |
| 31 #include <stdio.h> | |
| 32 #include <ctype.h> | |
| 33 | |
| 34 /* The code at the top of get_date which figures out the offset of the | |
| 35 current time zone checks various CPP symbols to see if special | |
| 36 tricks are need, but defaults to using the gettimeofday system call. | |
| 37 Include <sys/time.h> if that will be used. */ | |
| 38 | |
| 39 #if !defined (USG) && !defined (sgi) && !defined (__386BSD__) | |
| 40 #include <sys/time.h> | |
| 41 #endif | |
| 42 | |
| 43 #if defined(vms) | |
| 44 | |
| 45 #include <types.h> | |
| 46 #include <time.h> | |
| 47 | |
| 48 #else | |
| 49 | |
| 50 #include <sys/types.h> | |
| 51 | |
| 52 #if defined(USG) || !defined(HAVE_FTIME) | |
| 53 /* | |
| 54 ** If you need to do a tzset() call to set the | |
| 55 ** timezone, and don't have ftime(). | |
| 56 */ | |
| 57 struct timeb { | |
| 58 time_t time; /* Seconds since the epoch */ | |
| 59 unsigned short millitm; /* Field not used */ | |
| 60 short timezone; | |
| 61 short dstflag; /* Field not used */ | |
| 62 }; | |
| 63 | |
| 64 #else | |
| 65 | |
| 66 #include <sys/timeb.h> | |
| 67 | |
| 68 #endif /* defined(USG) && !defined(HAVE_FTIME) */ | |
| 69 | |
| 70 #if defined(BSD4_2) || defined(BSD4_1C) || (defined (hp9000) && !defined (hpux)) | |
| 71 #include <sys/time.h> | |
| 72 #else | |
| 73 #if defined(_AIX) | |
| 74 #include <sys/time.h> | |
| 75 #endif | |
| 76 #include <time.h> | |
| 77 #endif /* defined(BSD4_2) */ | |
| 78 | |
| 79 #endif /* defined(vms) */ | |
| 80 | |
| 81 #if defined (STDC_HEADERS) || defined (USG) | |
| 82 #include <string.h> | |
| 83 #endif | |
| 84 | |
| 85 #if sgi | |
| 86 #undef timezone | |
| 87 #endif | |
| 88 | |
| 89 extern struct tm *localtime(); | |
| 90 | |
| 91 #define yyparse getdate_yyparse | |
| 92 #define yylex getdate_yylex | |
| 93 #define yyerror getdate_yyerror | |
| 94 | |
| 95 #if !defined(lint) && !defined(SABER) | |
| 96 static char RCS[] = | |
|
16
01c6d40adf9d
Make tables static and const when possible.
Jim Meyering <jim@meyering.net>
parents:
9
diff
changeset
|
97 "$Header: /w/src/cvsroot/shellutils/lib/getdate.y,v 1.1.1.1 1992/11/01 05:44:32 meyering Exp $"; |
| 9 | 98 #endif /* !defined(lint) && !defined(SABER) */ |
| 99 | |
| 100 | |
| 101 #define EPOCH 1970 | |
| 102 #define HOUR(x) ((time_t)(x) * 60) | |
| 103 #define SECSPERDAY (24L * 60L * 60L) | |
| 104 | |
| 105 | |
| 106 /* | |
| 107 ** An entry in the lexical lookup table. | |
| 108 */ | |
| 109 typedef struct _TABLE { | |
| 110 char *name; | |
| 111 int type; | |
| 112 time_t value; | |
| 113 } TABLE; | |
| 114 | |
| 115 | |
| 116 /* | |
| 117 ** Daylight-savings mode: on, off, or not yet known. | |
| 118 */ | |
| 119 typedef enum _DSTMODE { | |
| 120 DSTon, DSToff, DSTmaybe | |
| 121 } DSTMODE; | |
| 122 | |
| 123 /* | |
| 124 ** Meridian: am, pm, or 24-hour style. | |
| 125 */ | |
| 126 typedef enum _MERIDIAN { | |
| 127 MERam, MERpm, MER24 | |
| 128 } MERIDIAN; | |
| 129 | |
| 130 | |
| 131 /* | |
| 132 ** Global variables. We could get rid of most of these by using a good | |
| 133 ** union as the yacc stack. (This routine was originally written before | |
| 134 ** yacc had the %union construct.) Maybe someday; right now we only use | |
| 135 ** the %union very rarely. | |
| 136 */ | |
| 137 static char *yyInput; | |
| 138 static DSTMODE yyDSTmode; | |
| 139 static time_t yyDayOrdinal; | |
| 140 static time_t yyDayNumber; | |
| 141 static int yyHaveDate; | |
| 142 static int yyHaveDay; | |
| 143 static int yyHaveRel; | |
| 144 static int yyHaveTime; | |
| 145 static int yyHaveZone; | |
| 146 static time_t yyTimezone; | |
| 147 static time_t yyDay; | |
| 148 static time_t yyHour; | |
| 149 static time_t yyMinutes; | |
| 150 static time_t yyMonth; | |
| 151 static time_t yySeconds; | |
| 152 static time_t yyYear; | |
| 153 static MERIDIAN yyMeridian; | |
| 154 static time_t yyRelMonth; | |
| 155 static time_t yyRelSeconds; | |
| 156 | |
| 157 %} | |
| 158 | |
| 159 %union { | |
| 160 time_t Number; | |
| 161 enum _MERIDIAN Meridian; | |
| 162 } | |
| 163 | |
| 164 %token tAGO tDAY tDAYZONE tID tMERIDIAN tMINUTE_UNIT tMONTH tMONTH_UNIT | |
| 165 %token tSEC_UNIT tSNUMBER tUNUMBER tZONE tDST | |
| 166 | |
| 167 %type <Number> tDAY tDAYZONE tMINUTE_UNIT tMONTH tMONTH_UNIT | |
| 168 %type <Number> tSEC_UNIT tSNUMBER tUNUMBER tZONE | |
| 169 %type <Meridian> tMERIDIAN o_merid | |
| 170 | |
| 171 %% | |
| 172 | |
| 173 spec : /* NULL */ | |
| 174 | spec item | |
| 175 ; | |
| 176 | |
| 177 item : time { | |
| 178 yyHaveTime++; | |
| 179 } | |
| 180 | zone { | |
| 181 yyHaveZone++; | |
| 182 } | |
| 183 | date { | |
| 184 yyHaveDate++; | |
| 185 } | |
| 186 | day { | |
| 187 yyHaveDay++; | |
| 188 } | |
| 189 | rel { | |
| 190 yyHaveRel++; | |
| 191 } | |
| 192 | number | |
| 193 ; | |
| 194 | |
| 195 time : tUNUMBER tMERIDIAN { | |
| 196 yyHour = $1; | |
| 197 yyMinutes = 0; | |
| 198 yySeconds = 0; | |
| 199 yyMeridian = $2; | |
| 200 } | |
| 201 | tUNUMBER ':' tUNUMBER o_merid { | |
| 202 yyHour = $1; | |
| 203 yyMinutes = $3; | |
| 204 yySeconds = 0; | |
| 205 yyMeridian = $4; | |
| 206 } | |
| 207 | tUNUMBER ':' tUNUMBER tSNUMBER { | |
| 208 yyHour = $1; | |
| 209 yyMinutes = $3; | |
| 210 yyMeridian = MER24; | |
| 211 yyDSTmode = DSToff; | |
| 212 yyTimezone = - ($4 % 100 + ($4 / 100) * 60); | |
| 213 } | |
| 214 | tUNUMBER ':' tUNUMBER ':' tUNUMBER o_merid { | |
| 215 yyHour = $1; | |
| 216 yyMinutes = $3; | |
| 217 yySeconds = $5; | |
| 218 yyMeridian = $6; | |
| 219 } | |
| 220 | tUNUMBER ':' tUNUMBER ':' tUNUMBER tSNUMBER { | |
| 221 yyHour = $1; | |
| 222 yyMinutes = $3; | |
| 223 yySeconds = $5; | |
| 224 yyMeridian = MER24; | |
| 225 yyDSTmode = DSToff; | |
| 226 yyTimezone = - ($6 % 100 + ($6 / 100) * 60); | |
| 227 } | |
| 228 ; | |
| 229 | |
| 230 zone : tZONE { | |
| 231 yyTimezone = $1; | |
| 232 yyDSTmode = DSToff; | |
| 233 } | |
| 234 | tDAYZONE { | |
| 235 yyTimezone = $1; | |
| 236 yyDSTmode = DSTon; | |
| 237 } | |
| 238 | | |
| 239 tZONE tDST { | |
| 240 yyTimezone = $1; | |
| 241 yyDSTmode = DSTon; | |
| 242 } | |
| 243 ; | |
| 244 | |
| 245 day : tDAY { | |
| 246 yyDayOrdinal = 1; | |
| 247 yyDayNumber = $1; | |
| 248 } | |
| 249 | tDAY ',' { | |
| 250 yyDayOrdinal = 1; | |
| 251 yyDayNumber = $1; | |
| 252 } | |
| 253 | tUNUMBER tDAY { | |
| 254 yyDayOrdinal = $1; | |
| 255 yyDayNumber = $2; | |
| 256 } | |
| 257 ; | |
| 258 | |
| 259 date : tUNUMBER '/' tUNUMBER { | |
| 260 yyMonth = $1; | |
| 261 yyDay = $3; | |
| 262 } | |
| 263 | tUNUMBER '/' tUNUMBER '/' tUNUMBER { | |
| 264 yyMonth = $1; | |
| 265 yyDay = $3; | |
| 266 yyYear = $5; | |
| 267 } | |
| 268 | tUNUMBER tSNUMBER tSNUMBER { | |
| 269 /* ISO 8601 format. yyyy-mm-dd. */ | |
| 270 yyYear = $1; | |
| 271 yyMonth = -$2; | |
| 272 yyDay = -$3; | |
| 273 } | |
| 274 | tMONTH tUNUMBER { | |
| 275 yyMonth = $1; | |
| 276 yyDay = $2; | |
| 277 } | |
| 278 | tMONTH tUNUMBER ',' tUNUMBER { | |
| 279 yyMonth = $1; | |
| 280 yyDay = $2; | |
| 281 yyYear = $4; | |
| 282 } | |
| 283 | tUNUMBER tMONTH { | |
| 284 yyMonth = $2; | |
| 285 yyDay = $1; | |
| 286 } | |
| 287 | tUNUMBER tMONTH tUNUMBER { | |
| 288 yyMonth = $2; | |
| 289 yyDay = $1; | |
| 290 yyYear = $3; | |
| 291 } | |
| 292 ; | |
| 293 | |
| 294 rel : relunit tAGO { | |
| 295 yyRelSeconds = -yyRelSeconds; | |
| 296 yyRelMonth = -yyRelMonth; | |
| 297 } | |
| 298 | relunit | |
| 299 ; | |
| 300 | |
| 301 relunit : tUNUMBER tMINUTE_UNIT { | |
| 302 yyRelSeconds += $1 * $2 * 60L; | |
| 303 } | |
| 304 | tSNUMBER tMINUTE_UNIT { | |
| 305 yyRelSeconds += $1 * $2 * 60L; | |
| 306 } | |
| 307 | tMINUTE_UNIT { | |
| 308 yyRelSeconds += $1 * 60L; | |
| 309 } | |
| 310 | tSNUMBER tSEC_UNIT { | |
| 311 yyRelSeconds += $1; | |
| 312 } | |
| 313 | tUNUMBER tSEC_UNIT { | |
| 314 yyRelSeconds += $1; | |
| 315 } | |
| 316 | tSEC_UNIT { | |
| 317 yyRelSeconds++; | |
| 318 } | |
| 319 | tSNUMBER tMONTH_UNIT { | |
| 320 yyRelMonth += $1 * $2; | |
| 321 } | |
| 322 | tUNUMBER tMONTH_UNIT { | |
| 323 yyRelMonth += $1 * $2; | |
| 324 } | |
| 325 | tMONTH_UNIT { | |
| 326 yyRelMonth += $1; | |
| 327 } | |
| 328 ; | |
| 329 | |
| 330 number : tUNUMBER { | |
| 331 if (yyHaveTime && yyHaveDate && !yyHaveRel) | |
| 332 yyYear = $1; | |
| 333 else { | |
| 334 if($1>10000) { | |
| 335 time_t date_part; | |
| 336 | |
| 337 date_part= $1/10000; | |
| 338 yyHaveDate++; | |
| 339 yyDay= (date_part)%100; | |
| 340 yyMonth= (date_part/100)%100; | |
| 341 yyYear = date_part/10000; | |
| 342 } | |
| 343 yyHaveTime++; | |
| 344 if ($1 < 100) { | |
| 345 yyHour = $1; | |
| 346 yyMinutes = 0; | |
| 347 } | |
| 348 else { | |
| 349 yyHour = $1 / 100; | |
| 350 yyMinutes = $1 % 100; | |
| 351 } | |
| 352 yySeconds = 0; | |
| 353 yyMeridian = MER24; | |
| 354 } | |
| 355 } | |
| 356 ; | |
| 357 | |
| 358 o_merid : /* NULL */ { | |
| 359 $$ = MER24; | |
| 360 } | |
| 361 | tMERIDIAN { | |
| 362 $$ = $1; | |
| 363 } | |
| 364 ; | |
| 365 | |
| 366 %% | |
| 367 | |
| 368 /* Month and day table. */ | |
|
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01c6d40adf9d
Make tables static and const when possible.
Jim Meyering <jim@meyering.net>
parents:
9
diff
changeset
|
369 static TABLE const MonthDayTable[] = { |
| 9 | 370 { "january", tMONTH, 1 }, |
| 371 { "february", tMONTH, 2 }, | |
| 372 { "march", tMONTH, 3 }, | |
| 373 { "april", tMONTH, 4 }, | |
| 374 { "may", tMONTH, 5 }, | |
| 375 { "june", tMONTH, 6 }, | |
| 376 { "july", tMONTH, 7 }, | |
| 377 { "august", tMONTH, 8 }, | |
| 378 { "september", tMONTH, 9 }, | |
| 379 { "sept", tMONTH, 9 }, | |
| 380 { "october", tMONTH, 10 }, | |
| 381 { "november", tMONTH, 11 }, | |
| 382 { "december", tMONTH, 12 }, | |
| 383 { "sunday", tDAY, 0 }, | |
| 384 { "monday", tDAY, 1 }, | |
| 385 { "tuesday", tDAY, 2 }, | |
| 386 { "tues", tDAY, 2 }, | |
| 387 { "wednesday", tDAY, 3 }, | |
| 388 { "wednes", tDAY, 3 }, | |
| 389 { "thursday", tDAY, 4 }, | |
| 390 { "thur", tDAY, 4 }, | |
| 391 { "thurs", tDAY, 4 }, | |
| 392 { "friday", tDAY, 5 }, | |
| 393 { "saturday", tDAY, 6 }, | |
| 394 { NULL } | |
| 395 }; | |
| 396 | |
| 397 /* Time units table. */ | |
|
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01c6d40adf9d
Make tables static and const when possible.
Jim Meyering <jim@meyering.net>
parents:
9
diff
changeset
|
398 static TABLE const UnitsTable[] = { |
| 9 | 399 { "year", tMONTH_UNIT, 12 }, |
| 400 { "month", tMONTH_UNIT, 1 }, | |
| 401 { "fortnight", tMINUTE_UNIT, 14 * 24 * 60 }, | |
| 402 { "week", tMINUTE_UNIT, 7 * 24 * 60 }, | |
| 403 { "day", tMINUTE_UNIT, 1 * 24 * 60 }, | |
| 404 { "hour", tMINUTE_UNIT, 60 }, | |
| 405 { "minute", tMINUTE_UNIT, 1 }, | |
| 406 { "min", tMINUTE_UNIT, 1 }, | |
| 407 { "second", tSEC_UNIT, 1 }, | |
| 408 { "sec", tSEC_UNIT, 1 }, | |
| 409 { NULL } | |
| 410 }; | |
| 411 | |
| 412 /* Assorted relative-time words. */ | |
|
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01c6d40adf9d
Make tables static and const when possible.
Jim Meyering <jim@meyering.net>
parents:
9
diff
changeset
|
413 static TABLE const OtherTable[] = { |
| 9 | 414 { "tomorrow", tMINUTE_UNIT, 1 * 24 * 60 }, |
| 415 { "yesterday", tMINUTE_UNIT, -1 * 24 * 60 }, | |
| 416 { "today", tMINUTE_UNIT, 0 }, | |
| 417 { "now", tMINUTE_UNIT, 0 }, | |
| 418 { "last", tUNUMBER, -1 }, | |
| 419 { "this", tMINUTE_UNIT, 0 }, | |
| 420 { "next", tUNUMBER, 2 }, | |
| 421 { "first", tUNUMBER, 1 }, | |
| 422 /* { "second", tUNUMBER, 2 }, */ | |
| 423 { "third", tUNUMBER, 3 }, | |
| 424 { "fourth", tUNUMBER, 4 }, | |
| 425 { "fifth", tUNUMBER, 5 }, | |
| 426 { "sixth", tUNUMBER, 6 }, | |
| 427 { "seventh", tUNUMBER, 7 }, | |
| 428 { "eighth", tUNUMBER, 8 }, | |
| 429 { "ninth", tUNUMBER, 9 }, | |
| 430 { "tenth", tUNUMBER, 10 }, | |
| 431 { "eleventh", tUNUMBER, 11 }, | |
| 432 { "twelfth", tUNUMBER, 12 }, | |
| 433 { "ago", tAGO, 1 }, | |
| 434 { NULL } | |
| 435 }; | |
| 436 | |
| 437 /* The timezone table. */ | |
| 438 /* Some of these are commented out because a time_t can't store a float. */ | |
|
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01c6d40adf9d
Make tables static and const when possible.
Jim Meyering <jim@meyering.net>
parents:
9
diff
changeset
|
439 static TABLE const TimezoneTable[] = { |
| 9 | 440 { "gmt", tZONE, HOUR( 0) }, /* Greenwich Mean */ |
| 441 { "ut", tZONE, HOUR( 0) }, /* Universal (Coordinated) */ | |
| 442 { "utc", tZONE, HOUR( 0) }, | |
| 443 { "wet", tZONE, HOUR( 0) }, /* Western European */ | |
| 444 { "bst", tDAYZONE, HOUR( 0) }, /* British Summer */ | |
| 445 { "wat", tZONE, HOUR( 1) }, /* West Africa */ | |
| 446 { "at", tZONE, HOUR( 2) }, /* Azores */ | |
| 447 #if 0 | |
| 448 /* For completeness. BST is also British Summer, and GST is | |
| 449 * also Guam Standard. */ | |
| 450 { "bst", tZONE, HOUR( 3) }, /* Brazil Standard */ | |
| 451 { "gst", tZONE, HOUR( 3) }, /* Greenland Standard */ | |
| 452 #endif | |
| 453 #if 0 | |
| 454 { "nft", tZONE, HOUR(3.5) }, /* Newfoundland */ | |
| 455 { "nst", tZONE, HOUR(3.5) }, /* Newfoundland Standard */ | |
| 456 { "ndt", tDAYZONE, HOUR(3.5) }, /* Newfoundland Daylight */ | |
| 457 #endif | |
| 458 { "ast", tZONE, HOUR( 4) }, /* Atlantic Standard */ | |
| 459 { "adt", tDAYZONE, HOUR( 4) }, /* Atlantic Daylight */ | |
| 460 { "est", tZONE, HOUR( 5) }, /* Eastern Standard */ | |
| 461 { "edt", tDAYZONE, HOUR( 5) }, /* Eastern Daylight */ | |
| 462 { "cst", tZONE, HOUR( 6) }, /* Central Standard */ | |
| 463 { "cdt", tDAYZONE, HOUR( 6) }, /* Central Daylight */ | |
| 464 { "mst", tZONE, HOUR( 7) }, /* Mountain Standard */ | |
| 465 { "mdt", tDAYZONE, HOUR( 7) }, /* Mountain Daylight */ | |
| 466 { "pst", tZONE, HOUR( 8) }, /* Pacific Standard */ | |
| 467 { "pdt", tDAYZONE, HOUR( 8) }, /* Pacific Daylight */ | |
| 468 { "yst", tZONE, HOUR( 9) }, /* Yukon Standard */ | |
| 469 { "ydt", tDAYZONE, HOUR( 9) }, /* Yukon Daylight */ | |
| 470 { "hst", tZONE, HOUR(10) }, /* Hawaii Standard */ | |
| 471 { "hdt", tDAYZONE, HOUR(10) }, /* Hawaii Daylight */ | |
| 472 { "cat", tZONE, HOUR(10) }, /* Central Alaska */ | |
| 473 { "ahst", tZONE, HOUR(10) }, /* Alaska-Hawaii Standard */ | |
| 474 { "nt", tZONE, HOUR(11) }, /* Nome */ | |
| 475 { "idlw", tZONE, HOUR(12) }, /* International Date Line West */ | |
| 476 { "cet", tZONE, -HOUR(1) }, /* Central European */ | |
| 477 { "met", tZONE, -HOUR(1) }, /* Middle European */ | |
| 478 { "mewt", tZONE, -HOUR(1) }, /* Middle European Winter */ | |
| 479 { "mest", tDAYZONE, -HOUR(1) }, /* Middle European Summer */ | |
| 480 { "swt", tZONE, -HOUR(1) }, /* Swedish Winter */ | |
| 481 { "sst", tDAYZONE, -HOUR(1) }, /* Swedish Summer */ | |
| 482 { "fwt", tZONE, -HOUR(1) }, /* French Winter */ | |
| 483 { "fst", tDAYZONE, -HOUR(1) }, /* French Summer */ | |
| 484 { "eet", tZONE, -HOUR(2) }, /* Eastern Europe, USSR Zone 1 */ | |
| 485 { "bt", tZONE, -HOUR(3) }, /* Baghdad, USSR Zone 2 */ | |
| 486 #if 0 | |
| 487 { "it", tZONE, -HOUR(3.5) },/* Iran */ | |
| 488 #endif | |
| 489 { "zp4", tZONE, -HOUR(4) }, /* USSR Zone 3 */ | |
| 490 { "zp5", tZONE, -HOUR(5) }, /* USSR Zone 4 */ | |
| 491 #if 0 | |
| 492 { "ist", tZONE, -HOUR(5.5) },/* Indian Standard */ | |
| 493 #endif | |
| 494 { "zp6", tZONE, -HOUR(6) }, /* USSR Zone 5 */ | |
| 495 #if 0 | |
| 496 /* For completeness. NST is also Newfoundland Stanard, and SST is | |
| 497 * also Swedish Summer. */ | |
| 498 { "nst", tZONE, -HOUR(6.5) },/* North Sumatra */ | |
| 499 { "sst", tZONE, -HOUR(7) }, /* South Sumatra, USSR Zone 6 */ | |
| 500 #endif /* 0 */ | |
| 501 { "wast", tZONE, -HOUR(7) }, /* West Australian Standard */ | |
| 502 { "wadt", tDAYZONE, -HOUR(7) }, /* West Australian Daylight */ | |
| 503 #if 0 | |
| 504 { "jt", tZONE, -HOUR(7.5) },/* Java (3pm in Cronusland!) */ | |
| 505 #endif | |
| 506 { "cct", tZONE, -HOUR(8) }, /* China Coast, USSR Zone 7 */ | |
| 507 { "jst", tZONE, -HOUR(9) }, /* Japan Standard, USSR Zone 8 */ | |
| 508 #if 0 | |
| 509 { "cast", tZONE, -HOUR(9.5) },/* Central Australian Standard */ | |
| 510 { "cadt", tDAYZONE, -HOUR(9.5) },/* Central Australian Daylight */ | |
| 511 #endif | |
| 512 { "east", tZONE, -HOUR(10) }, /* Eastern Australian Standard */ | |
| 513 { "eadt", tDAYZONE, -HOUR(10) }, /* Eastern Australian Daylight */ | |
| 514 { "gst", tZONE, -HOUR(10) }, /* Guam Standard, USSR Zone 9 */ | |
| 515 { "nzt", tZONE, -HOUR(12) }, /* New Zealand */ | |
| 516 { "nzst", tZONE, -HOUR(12) }, /* New Zealand Standard */ | |
| 517 { "nzdt", tDAYZONE, -HOUR(12) }, /* New Zealand Daylight */ | |
| 518 { "idle", tZONE, -HOUR(12) }, /* International Date Line East */ | |
| 519 { NULL } | |
| 520 }; | |
| 521 | |
| 522 /* Military timezone table. */ | |
|
16
01c6d40adf9d
Make tables static and const when possible.
Jim Meyering <jim@meyering.net>
parents:
9
diff
changeset
|
523 static TABLE const MilitaryTable[] = { |
| 9 | 524 { "a", tZONE, HOUR( 1) }, |
| 525 { "b", tZONE, HOUR( 2) }, | |
| 526 { "c", tZONE, HOUR( 3) }, | |
| 527 { "d", tZONE, HOUR( 4) }, | |
| 528 { "e", tZONE, HOUR( 5) }, | |
| 529 { "f", tZONE, HOUR( 6) }, | |
| 530 { "g", tZONE, HOUR( 7) }, | |
| 531 { "h", tZONE, HOUR( 8) }, | |
| 532 { "i", tZONE, HOUR( 9) }, | |
| 533 { "k", tZONE, HOUR( 10) }, | |
| 534 { "l", tZONE, HOUR( 11) }, | |
| 535 { "m", tZONE, HOUR( 12) }, | |
| 536 { "n", tZONE, HOUR(- 1) }, | |
| 537 { "o", tZONE, HOUR(- 2) }, | |
| 538 { "p", tZONE, HOUR(- 3) }, | |
| 539 { "q", tZONE, HOUR(- 4) }, | |
| 540 { "r", tZONE, HOUR(- 5) }, | |
| 541 { "s", tZONE, HOUR(- 6) }, | |
| 542 { "t", tZONE, HOUR(- 7) }, | |
| 543 { "u", tZONE, HOUR(- 8) }, | |
| 544 { "v", tZONE, HOUR(- 9) }, | |
| 545 { "w", tZONE, HOUR(-10) }, | |
| 546 { "x", tZONE, HOUR(-11) }, | |
| 547 { "y", tZONE, HOUR(-12) }, | |
| 548 { "z", tZONE, HOUR( 0) }, | |
| 549 { NULL } | |
| 550 }; | |
| 551 | |
| 552 | |
| 553 | |
| 554 | |
| 555 /* ARGSUSED */ | |
|
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|
556 static int |
| 9 | 557 yyerror(s) |
| 558 char *s; | |
| 559 { | |
| 560 return 0; | |
| 561 } | |
| 562 | |
| 563 | |
| 564 static time_t | |
| 565 ToSeconds(Hours, Minutes, Seconds, Meridian) | |
| 566 time_t Hours; | |
| 567 time_t Minutes; | |
| 568 time_t Seconds; | |
| 569 MERIDIAN Meridian; | |
| 570 { | |
| 571 if (Minutes < 0 || Minutes > 59 || Seconds < 0 || Seconds > 59) | |
| 572 return -1; | |
| 573 switch (Meridian) { | |
| 574 case MER24: | |
| 575 if (Hours < 0 || Hours > 23) | |
| 576 return -1; | |
| 577 return (Hours * 60L + Minutes) * 60L + Seconds; | |
| 578 case MERam: | |
| 579 if (Hours < 1 || Hours > 12) | |
| 580 return -1; | |
| 581 return (Hours * 60L + Minutes) * 60L + Seconds; | |
| 582 case MERpm: | |
| 583 if (Hours < 1 || Hours > 12) | |
| 584 return -1; | |
| 585 return ((Hours + 12) * 60L + Minutes) * 60L + Seconds; | |
| 586 } | |
| 587 /* NOTREACHED */ | |
| 588 } | |
| 589 | |
| 590 | |
| 591 static time_t | |
| 592 Convert(Month, Day, Year, Hours, Minutes, Seconds, Meridian, DSTmode) | |
| 593 time_t Month; | |
| 594 time_t Day; | |
| 595 time_t Year; | |
| 596 time_t Hours; | |
| 597 time_t Minutes; | |
| 598 time_t Seconds; | |
| 599 MERIDIAN Meridian; | |
| 600 DSTMODE DSTmode; | |
| 601 { | |
|
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602 static int DaysInMonth[12] = { |
| 9 | 603 31, 0, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 |
| 604 }; | |
| 605 time_t tod; | |
| 606 time_t Julian; | |
| 607 int i; | |
| 608 | |
| 609 if (Year < 0) | |
| 610 Year = -Year; | |
| 611 if (Year < 100) | |
| 612 Year += 1900; | |
| 613 DaysInMonth[1] = Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0) | |
| 614 ? 29 : 28; | |
| 615 if (Year < EPOCH || Year > 1999 | |
| 616 || Month < 1 || Month > 12 | |
| 617 /* Lint fluff: "conversion from long may lose accuracy" */ | |
| 618 || Day < 1 || Day > DaysInMonth[(int)--Month]) | |
| 619 return -1; | |
| 620 | |
| 621 for (Julian = Day - 1, i = 0; i < Month; i++) | |
| 622 Julian += DaysInMonth[i]; | |
| 623 for (i = EPOCH; i < Year; i++) | |
| 624 Julian += 365 + (i % 4 == 0); | |
| 625 Julian *= SECSPERDAY; | |
| 626 Julian += yyTimezone * 60L; | |
| 627 if ((tod = ToSeconds(Hours, Minutes, Seconds, Meridian)) < 0) | |
| 628 return -1; | |
| 629 Julian += tod; | |
| 630 if (DSTmode == DSTon | |
| 631 || (DSTmode == DSTmaybe && localtime(&Julian)->tm_isdst)) | |
| 632 Julian -= 60 * 60; | |
| 633 return Julian; | |
| 634 } | |
| 635 | |
| 636 | |
| 637 static time_t | |
| 638 DSTcorrect(Start, Future) | |
| 639 time_t Start; | |
| 640 time_t Future; | |
| 641 { | |
| 642 time_t StartDay; | |
| 643 time_t FutureDay; | |
| 644 | |
| 645 StartDay = (localtime(&Start)->tm_hour + 1) % 24; | |
| 646 FutureDay = (localtime(&Future)->tm_hour + 1) % 24; | |
| 647 return (Future - Start) + (StartDay - FutureDay) * 60L * 60L; | |
| 648 } | |
| 649 | |
| 650 | |
| 651 static time_t | |
| 652 RelativeDate(Start, DayOrdinal, DayNumber) | |
| 653 time_t Start; | |
| 654 time_t DayOrdinal; | |
| 655 time_t DayNumber; | |
| 656 { | |
| 657 struct tm *tm; | |
| 658 time_t now; | |
| 659 | |
| 660 now = Start; | |
| 661 tm = localtime(&now); | |
| 662 now += SECSPERDAY * ((DayNumber - tm->tm_wday + 7) % 7); | |
| 663 now += 7 * SECSPERDAY * (DayOrdinal <= 0 ? DayOrdinal : DayOrdinal - 1); | |
| 664 return DSTcorrect(Start, now); | |
| 665 } | |
| 666 | |
| 667 | |
| 668 static time_t | |
| 669 RelativeMonth(Start, RelMonth) | |
| 670 time_t Start; | |
| 671 time_t RelMonth; | |
| 672 { | |
| 673 struct tm *tm; | |
| 674 time_t Month; | |
| 675 time_t Year; | |
| 676 | |
| 677 if (RelMonth == 0) | |
| 678 return 0; | |
| 679 tm = localtime(&Start); | |
| 680 Month = 12 * tm->tm_year + tm->tm_mon + RelMonth; | |
| 681 Year = Month / 12; | |
| 682 Month = Month % 12 + 1; | |
| 683 return DSTcorrect(Start, | |
| 684 Convert(Month, (time_t)tm->tm_mday, Year, | |
| 685 (time_t)tm->tm_hour, (time_t)tm->tm_min, (time_t)tm->tm_sec, | |
| 686 MER24, DSTmaybe)); | |
| 687 } | |
| 688 | |
| 689 | |
| 690 static int | |
| 691 LookupWord(buff) | |
| 692 char *buff; | |
| 693 { | |
| 694 register char *p; | |
| 695 register char *q; | |
|
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parents:
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diff
changeset
|
696 register const TABLE *tp; |
| 9 | 697 int i; |
| 698 int abbrev; | |
| 699 | |
| 700 /* Make it lowercase. */ | |
| 701 for (p = buff; *p; p++) | |
| 702 if (isupper(*p)) | |
| 703 *p = tolower(*p); | |
| 704 | |
| 705 if (strcmp(buff, "am") == 0 || strcmp(buff, "a.m.") == 0) { | |
| 706 yylval.Meridian = MERam; | |
| 707 return tMERIDIAN; | |
| 708 } | |
| 709 if (strcmp(buff, "pm") == 0 || strcmp(buff, "p.m.") == 0) { | |
| 710 yylval.Meridian = MERpm; | |
| 711 return tMERIDIAN; | |
| 712 } | |
| 713 | |
| 714 /* See if we have an abbreviation for a month. */ | |
| 715 if (strlen(buff) == 3) | |
| 716 abbrev = 1; | |
| 717 else if (strlen(buff) == 4 && buff[3] == '.') { | |
| 718 abbrev = 1; | |
| 719 buff[3] = '\0'; | |
| 720 } | |
| 721 else | |
| 722 abbrev = 0; | |
| 723 | |
| 724 for (tp = MonthDayTable; tp->name; tp++) { | |
| 725 if (abbrev) { | |
| 726 if (strncmp(buff, tp->name, 3) == 0) { | |
| 727 yylval.Number = tp->value; | |
| 728 return tp->type; | |
| 729 } | |
| 730 } | |
| 731 else if (strcmp(buff, tp->name) == 0) { | |
| 732 yylval.Number = tp->value; | |
| 733 return tp->type; | |
| 734 } | |
| 735 } | |
| 736 | |
| 737 for (tp = TimezoneTable; tp->name; tp++) | |
| 738 if (strcmp(buff, tp->name) == 0) { | |
| 739 yylval.Number = tp->value; | |
| 740 return tp->type; | |
| 741 } | |
| 742 | |
| 743 if (strcmp(buff, "dst") == 0) | |
| 744 return tDST; | |
| 745 | |
| 746 for (tp = UnitsTable; tp->name; tp++) | |
| 747 if (strcmp(buff, tp->name) == 0) { | |
| 748 yylval.Number = tp->value; | |
| 749 return tp->type; | |
| 750 } | |
| 751 | |
| 752 /* Strip off any plural and try the units table again. */ | |
| 753 i = strlen(buff) - 1; | |
| 754 if (buff[i] == 's') { | |
| 755 buff[i] = '\0'; | |
| 756 for (tp = UnitsTable; tp->name; tp++) | |
| 757 if (strcmp(buff, tp->name) == 0) { | |
| 758 yylval.Number = tp->value; | |
| 759 return tp->type; | |
| 760 } | |
| 761 buff[i] = 's'; /* Put back for "this" in OtherTable. */ | |
| 762 } | |
| 763 | |
| 764 for (tp = OtherTable; tp->name; tp++) | |
| 765 if (strcmp(buff, tp->name) == 0) { | |
| 766 yylval.Number = tp->value; | |
| 767 return tp->type; | |
| 768 } | |
| 769 | |
| 770 /* Military timezones. */ | |
| 771 if (buff[1] == '\0' && isalpha(*buff)) { | |
| 772 for (tp = MilitaryTable; tp->name; tp++) | |
| 773 if (strcmp(buff, tp->name) == 0) { | |
| 774 yylval.Number = tp->value; | |
| 775 return tp->type; | |
| 776 } | |
| 777 } | |
| 778 | |
| 779 /* Drop out any periods and try the timezone table again. */ | |
| 780 for (i = 0, p = q = buff; *q; q++) | |
| 781 if (*q != '.') | |
| 782 *p++ = *q; | |
| 783 else | |
| 784 i++; | |
| 785 *p = '\0'; | |
| 786 if (i) | |
| 787 for (tp = TimezoneTable; tp->name; tp++) | |
| 788 if (strcmp(buff, tp->name) == 0) { | |
| 789 yylval.Number = tp->value; | |
| 790 return tp->type; | |
| 791 } | |
| 792 | |
| 793 return tID; | |
| 794 } | |
| 795 | |
| 796 | |
|
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parents:
9
diff
changeset
|
797 static int |
| 9 | 798 yylex() |
| 799 { | |
| 800 register char c; | |
| 801 register char *p; | |
| 802 char buff[20]; | |
| 803 int Count; | |
| 804 int sign; | |
| 805 | |
| 806 for ( ; ; ) { | |
| 807 while (isspace(*yyInput)) | |
| 808 yyInput++; | |
| 809 | |
| 810 if (isdigit(c = *yyInput) || c == '-' || c == '+') { | |
| 811 if (c == '-' || c == '+') { | |
| 812 sign = c == '-' ? -1 : 1; | |
| 813 if (!isdigit(*++yyInput)) | |
| 814 /* skip the '-' sign */ | |
| 815 continue; | |
| 816 } | |
| 817 else | |
| 818 sign = 0; | |
| 819 for (yylval.Number = 0; isdigit(c = *yyInput++); ) | |
| 820 yylval.Number = 10 * yylval.Number + c - '0'; | |
| 821 yyInput--; | |
| 822 if (sign < 0) | |
| 823 yylval.Number = -yylval.Number; | |
| 824 return sign ? tSNUMBER : tUNUMBER; | |
| 825 } | |
| 826 if (isalpha(c)) { | |
| 827 for (p = buff; isalpha(c = *yyInput++) || c == '.'; ) | |
| 828 if (p < &buff[sizeof buff - 1]) | |
| 829 *p++ = c; | |
| 830 *p = '\0'; | |
| 831 yyInput--; | |
| 832 return LookupWord(buff); | |
| 833 } | |
| 834 if (c != '(') | |
| 835 return *yyInput++; | |
| 836 Count = 0; | |
| 837 do { | |
| 838 c = *yyInput++; | |
| 839 if (c == '\0') | |
| 840 return c; | |
| 841 if (c == '(') | |
| 842 Count++; | |
| 843 else if (c == ')') | |
| 844 Count--; | |
| 845 } while (Count > 0); | |
| 846 } | |
| 847 } | |
| 848 | |
| 849 | |
| 850 time_t | |
| 851 get_date(p, now) | |
| 852 char *p; | |
| 853 struct timeb *now; | |
| 854 { | |
| 855 struct tm *tm; | |
| 856 struct timeb ftz; | |
| 857 time_t Start; | |
| 858 time_t tod; | |
| 859 | |
| 860 yyInput = p; | |
| 861 if (now == NULL) { | |
| 862 now = &ftz; | |
| 863 #if !defined(HAVE_FTIME) | |
| 864 (void)time(&ftz.time); | |
| 865 /* Set the timezone global. */ | |
| 866 tzset(); | |
| 867 { | |
| 868 #if sgi | |
| 869 ftz.timezone = (int) _timezone / 60; | |
| 870 #else /* not sgi */ | |
| 871 #ifdef __386BSD__ | |
| 872 ftz.timezone = 0; | |
| 873 #else /* neither sgi nor 386BSD */ | |
| 874 #if defined (USG) | |
| 875 extern time_t timezone; | |
| 876 | |
| 877 ftz.timezone = (int) timezone / 60; | |
| 878 #else /* neither sgi nor 386BSD nor USG */ | |
| 879 struct timeval tv; | |
| 880 struct timezone tz; | |
| 881 | |
| 882 gettimeofday (&tv, &tz); | |
| 883 ftz.timezone = (int) tz.tz_minuteswest; | |
| 884 #endif /* neither sgi nor 386BSD nor USG */ | |
| 885 #endif /* neither sgi nor 386BSD */ | |
| 886 #endif /* not sgi */ | |
| 887 } | |
| 888 #else /* HAVE_FTIME */ | |
| 889 (void)ftime(&ftz); | |
| 890 #endif /* HAVE_FTIME */ | |
| 891 } | |
| 892 | |
| 893 tm = localtime(&now->time); | |
| 894 yyYear = tm->tm_year; | |
| 895 yyMonth = tm->tm_mon + 1; | |
| 896 yyDay = tm->tm_mday; | |
| 897 yyTimezone = now->timezone; | |
| 898 yyDSTmode = DSTmaybe; | |
| 899 yyHour = 0; | |
| 900 yyMinutes = 0; | |
| 901 yySeconds = 0; | |
| 902 yyMeridian = MER24; | |
| 903 yyRelSeconds = 0; | |
| 904 yyRelMonth = 0; | |
| 905 yyHaveDate = 0; | |
| 906 yyHaveDay = 0; | |
| 907 yyHaveRel = 0; | |
| 908 yyHaveTime = 0; | |
| 909 yyHaveZone = 0; | |
| 910 | |
| 911 if (yyparse() | |
| 912 || yyHaveTime > 1 || yyHaveZone > 1 || yyHaveDate > 1 || yyHaveDay > 1) | |
| 913 return -1; | |
| 914 | |
| 915 if (yyHaveDate || yyHaveTime || yyHaveDay) { | |
| 916 Start = Convert(yyMonth, yyDay, yyYear, yyHour, yyMinutes, yySeconds, | |
| 917 yyMeridian, yyDSTmode); | |
| 918 if (Start < 0) | |
| 919 return -1; | |
| 920 } | |
| 921 else { | |
| 922 Start = now->time; | |
| 923 if (!yyHaveRel) | |
| 924 Start -= ((tm->tm_hour * 60L + tm->tm_min) * 60L) + tm->tm_sec; | |
| 925 } | |
| 926 | |
| 927 Start += yyRelSeconds; | |
| 928 Start += RelativeMonth(Start, yyRelMonth); | |
| 929 | |
| 930 if (yyHaveDay && !yyHaveDate) { | |
| 931 tod = RelativeDate(Start, yyDayOrdinal, yyDayNumber); | |
| 932 Start += tod; | |
| 933 } | |
| 934 | |
| 935 /* Have to do *something* with a legitimate -1 so it's distinguishable | |
| 936 * from the error return value. (Alternately could set errno on error.) */ | |
| 937 return Start == -1 ? 0 : Start; | |
| 938 } | |
| 939 | |
| 940 | |
| 941 #if defined(TEST) | |
| 942 | |
| 943 /* ARGSUSED */ | |
| 944 main(ac, av) | |
| 945 int ac; | |
| 946 char *av[]; | |
| 947 { | |
| 948 char buff[128]; | |
| 949 time_t d; | |
| 950 | |
| 951 (void)printf("Enter date, or blank line to exit.\n\t> "); | |
| 952 (void)fflush(stdout); | |
| 953 while (gets(buff) && buff[0]) { | |
| 954 d = get_date(buff, (struct timeb *)NULL); | |
| 955 if (d == -1) | |
| 956 (void)printf("Bad format - couldn't convert.\n"); | |
| 957 else | |
| 958 (void)printf("%s", ctime(&d)); | |
| 959 (void)printf("\t> "); | |
| 960 (void)fflush(stdout); | |
| 961 } | |
| 962 exit(0); | |
| 963 /* NOTREACHED */ | |
| 964 } | |
| 965 #endif /* defined(TEST) */ |