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1.1 ! root 1: /* ! 2: * PARTIME parse date/time string into a TM structure ! 3: * ! 4: * Usage: ! 5: * #include "time.h" -- expanded tm structure ! 6: * char *str; struct tm *tp; ! 7: * partime(str,tp); ! 8: * Returns: ! 9: * 0 if parsing failed ! 10: * else time values in specified TM structure (unspecified values ! 11: * set to TMNULL) ! 12: * Notes: ! 13: * This code is quasi-public; it may be used freely in like software. ! 14: * It is not to be sold, nor used in licensed software without ! 15: * permission of the author. ! 16: * For everyone's benefit, please report bugs and improvements! ! 17: * Copyright 1980 by Ken Harrenstien, SRI International. ! 18: * (ARPANET: KLH @ SRI) ! 19: */ ! 20: ! 21: /* Hacknotes: ! 22: * If parsing changed so that no backup needed, could perhaps modify ! 23: * to use a FILE input stream. Need terminator, though. ! 24: * Perhaps should return 0 on success, else a non-zero error val? ! 25: * Flush AMPM from TM structure and handle locally within PARTIME, ! 26: * like midnight/noon? ! 27: */ ! 28: ! 29: #ifndef lint ! 30: static char rcsid[]= ! 31: "$Header: /arthur/src/local/bin/rcs/src/RCS/partime.c,v 1.2 87/03/27 14:21:53 jenkins Exp $"; ! 32: #endif ! 33: ! 34: /* $Log: partime.c,v $ ! 35: * Revision 1.2 87/03/27 14:21:53 jenkins ! 36: * Port to suns ! 37: * ! 38: * Revision 1.1 84/01/23 14:50:07 kcs ! 39: * Initial revision ! 40: * ! 41: * Revision 1.1 82/05/06 11:38:26 wft ! 42: * Initial revision ! 43: * ! 44: */ ! 45: ! 46: #include <stdio.h> ! 47: #include <ctype.h> ! 48: #include "time.h" ! 49: ! 50: #ifndef lint ! 51: static char timeid[] = TIMEID; ! 52: #endif ! 53: ! 54: struct tmwent { ! 55: char *went; ! 56: long wval; /* must be big enough to hold pointer or integer */ ! 57: char wflgs; ! 58: char wtype; ! 59: }; ! 60: /* wflgs */ ! 61: #define TWSPEC 01 /* Word wants special processing */ ! 62: #define TWTIME 02 /* Word is a time value (absence implies date) */ ! 63: #define TWDST 04 /* Word is a DST-type timezone */ ! 64: #define TW1200 010 /* Word is NOON or MIDNIGHT (sigh) */ ! 65: ! 66: int pt12hack(); ! 67: int ptnoise(); ! 68: struct tmwent tmwords [] = { ! 69: {"january", 0, 0, TM_MON}, ! 70: {"february", 1, 0, TM_MON}, ! 71: {"march", 2, 0, TM_MON}, ! 72: {"april", 3, 0, TM_MON}, ! 73: {"may", 4, 0, TM_MON}, ! 74: {"june", 5, 0, TM_MON}, ! 75: {"july", 6, 0, TM_MON}, ! 76: {"august", 7, 0, TM_MON}, ! 77: {"september", 8, 0, TM_MON}, ! 78: {"october", 9, 0, TM_MON}, ! 79: {"november", 10, 0, TM_MON}, ! 80: {"december", 11, 0, TM_MON}, ! 81: ! 82: {"sunday", 0, 0, TM_WDAY}, ! 83: {"monday", 1, 0, TM_WDAY}, ! 84: {"tuesday", 2, 0, TM_WDAY}, ! 85: {"wednesday", 3, 0, TM_WDAY}, ! 86: {"thursday", 4, 0, TM_WDAY}, ! 87: {"friday", 5, 0, TM_WDAY}, ! 88: {"saturday", 6, 0, TM_WDAY}, ! 89: ! 90: {"gmt", 0*60, TWTIME, TM_ZON}, /* Greenwich */ ! 91: {"gst", 0*60, TWTIME, TM_ZON}, ! 92: {"gdt", 0*60, TWTIME+TWDST, TM_ZON}, /* ?? */ ! 93: ! 94: {"ast", 4*60, TWTIME, TM_ZON}, /* Atlantic */ ! 95: {"est", 5*60, TWTIME, TM_ZON}, /* Eastern */ ! 96: {"cst", 6*60, TWTIME, TM_ZON}, /* Central */ ! 97: {"mst", 7*60, TWTIME, TM_ZON}, /* Mountain */ ! 98: {"pst", 8*60, TWTIME, TM_ZON}, /* Pacific */ ! 99: {"yst", 9*60, TWTIME, TM_ZON}, /* Yukon */ ! 100: {"hst", 10*60, TWTIME, TM_ZON}, /* Hawaii */ ! 101: {"bst", 11*60, TWTIME, TM_ZON}, /* Bering */ ! 102: ! 103: {"adt", 4*60, TWTIME+TWDST, TM_ZON}, /* Atlantic */ ! 104: {"edt", 5*60, TWTIME+TWDST, TM_ZON}, /* Eastern */ ! 105: {"cdt", 6*60, TWTIME+TWDST, TM_ZON}, /* Central */ ! 106: {"mdt", 7*60, TWTIME+TWDST, TM_ZON}, /* Mountain */ ! 107: {"pdt", 8*60, TWTIME+TWDST, TM_ZON}, /* Pacific */ ! 108: {"ydt", 9*60, TWTIME+TWDST, TM_ZON}, /* Yukon */ ! 109: {"hdt", 10*60, TWTIME+TWDST, TM_ZON}, /* Hawaii */ ! 110: {"bdt", 11*60, TWTIME+TWDST, TM_ZON}, /* Bering */ ! 111: ! 112: {"daylight", 1, TWTIME+TWDST, TM_ZON}, /* Local Daylight */ ! 113: {"standard", 1, TWTIME, TM_ZON}, /* Local Standard */ ! 114: {"std", 1, TWTIME, TM_ZON}, /* " " */ ! 115: ! 116: {"am", 1, TWTIME, TM_AMPM}, ! 117: {"pm", 2, TWTIME, TM_AMPM}, ! 118: {"noon", 12,TWTIME+TW1200, 0}, /* Special frobs */ ! 119: {"midnight", 0, TWTIME+TW1200, 0}, ! 120: {"at", (long)ptnoise, TWSPEC, 0}, /* Noise word */ ! 121: ! 122: {0, 0, 0, 0}, /* Zero entry to terminate searches */ ! 123: }; ! 124: ! 125: #define TMWILD (-2) /* Value meaning item specified as wild-card */ ! 126: /* (May use someday...) */ ! 127: ! 128: struct token { ! 129: char *tcp; /* pointer to string */ ! 130: int tcnt; /* # chars */ ! 131: char tbrk; /* "break" char */ ! 132: char tbrkl; /* last break char */ ! 133: char tflg; /* 0 = alpha, 1 = numeric */ ! 134: union { /* Resulting value; */ ! 135: int tnum;/* either a #, or */ ! 136: struct tmwent *ttmw;/* ptr to a tmwent. */ ! 137: } tval; ! 138: }; ! 139: ! 140: partime(astr, atm) ! 141: char *astr; ! 142: struct tm *atm; ! 143: { register int *tp; ! 144: register struct tmwent *twp; ! 145: register int i; ! 146: struct token btoken, atoken; ! 147: char *cp, ch; ! 148: int ord, midnoon; ! 149: int (*aproc)(); ! 150: ! 151: tp = (int *)atm; ! 152: zaptime(tp); /* Initialize the TM structure */ ! 153: midnoon = TMNULL; /* and our own temp stuff */ ! 154: btoken.tcnt = btoken.tbrkl = 0; ! 155: btoken.tcp = astr; ! 156: ! 157: domore: ! 158: if(!ptitoken(btoken.tcp+btoken.tcnt,&btoken)) /* Get a token */ ! 159: { if(btoken.tval.tnum) return(0); /* Read error? */ ! 160: if(midnoon != TMNULL) /* EOF, wrap up */ ! 161: return(pt12hack(tp, midnoon)); ! 162: return(1); /* Win return! */ ! 163: } ! 164: if(btoken.tflg == 0) /* Alpha? */ ! 165: { twp = btoken.tval.ttmw; /* Yes, get ptr to entry */ ! 166: if(twp->wflgs&TWSPEC) /* Special alpha crock */ ! 167: { aproc = (int (*) ()) (twp->wval); ! 168: if(!(*aproc)(tp, twp, &btoken)) ! 169: return(0); /* ERR: special word err */ ! 170: goto domore; ! 171: } ! 172: if(twp->wflgs&TW1200) ! 173: if(ptstash(&midnoon,(int)twp->wval)) ! 174: return(0); /* ERR: noon/midnite clash */ ! 175: else goto domore; ! 176: if(ptstash(&tp[twp->wtype],(int)twp->wval)) ! 177: return(0); /* ERR: val already set */ ! 178: if(twp->wtype == TM_ZON) /* If was zone, hack DST */ ! 179: if(ptstash(&tp[TM_ISDST],(twp->wflgs&TWDST))) ! 180: return(0); /* ERR: DST conflict */ ! 181: goto domore; ! 182: } ! 183: ! 184: /* Token is number. Lots of hairy heuristics. */ ! 185: if(btoken.tcnt >= 7) /* More than 6 digits in string? */ ! 186: return(0); /* ERR: number too big */ ! 187: if(btoken.tcnt == 6) /* 6 digits = HHMMSS. Needs special crock */ ! 188: { /* since 6 digits are too big for integer! */ ! 189: i = (btoken.tcp[0]-'0')*10 /* Gobble 1st 2 digits */ ! 190: + btoken.tcp[1]-'0'; ! 191: btoken.tcnt = 2; /* re-read last 4 chars */ ! 192: goto coltime; ! 193: } ! 194: ! 195: i = btoken.tval.tnum; /* Value now known to be valid; get it. */ ! 196: if( btoken.tcnt == 5 /* 5 digits = HMMSS */ ! 197: || btoken.tcnt == 3) /* 3 digits = HMM */ ! 198: { if(btoken.tcnt != 3) ! 199: if(ptstash(&tp[TM_SEC], i%100)) ! 200: return(0); /* ERR: sec conflict */ ! 201: else i /= 100; ! 202: hhmm4: if(ptstash(&tp[TM_MIN], i%100)) ! 203: return(0); /* ERR: min conflict */ ! 204: i /= 100; ! 205: hh2: if(ptstash(&tp[TM_HOUR], i)) ! 206: return(0); /* ERR: hour conflict */ ! 207: goto domore; ! 208: } ! 209: ! 210: if(btoken.tcnt == 4) /* 4 digits = YEAR or HHMM */ ! 211: { if(tp[TM_YEAR] != TMNULL) goto hhmm4; /* Already got yr? */ ! 212: if(tp[TM_HOUR] != TMNULL) goto year4; /* Already got hr? */ ! 213: if((i%100) > 59) goto year4; /* MM >= 60? */ ! 214: if(btoken.tbrk == ':') /* HHMM:SS ? */ ! 215: if( ptstash(&tp[TM_HOUR],i/100) ! 216: || ptstash(&tp[TM_MIN], i%100)) ! 217: return(0); /* ERR: hr/min clash */ ! 218: else goto coltm2; /* Go handle SS */ ! 219: if(btoken.tbrk != ',' && btoken.tbrk != '/' ! 220: && ptitoken(btoken.tcp+btoken.tcnt,&atoken) /* Peek */ ! 221: && atoken.tflg == 0 /* alpha */ ! 222: && (atoken.tval.ttmw->wflgs&TWTIME)) /* HHMM-ZON */ ! 223: goto hhmm4; ! 224: if(btoken.tbrkl == '-' /* DD-Mon-YYYY */ ! 225: || btoken.tbrkl == ',' /* Mon DD, YYYY */ ! 226: || btoken.tbrkl == '/' /* MM/DD/YYYY */ ! 227: || btoken.tbrkl == '.' /* DD.MM.YYYY */ ! 228: || btoken.tbrk == '-' /* YYYY-MM-DD */ ! 229: ) goto year4; ! 230: goto hhmm4; /* Give up, assume HHMM. */ ! 231: } ! 232: ! 233: /* From this point on, assume tcnt == 1 or 2 */ ! 234: /* 2 digits = YY, MM, DD, or HH (MM and SS caught at coltime) */ ! 235: if(btoken.tbrk == ':') /* HH:MM[:SS] */ ! 236: goto coltime; /* must be part of time. */ ! 237: if(i > 31) goto yy2; /* If >= 32, only YY poss. */ ! 238: ! 239: /* Check for numerical-format date */ ! 240: for (cp = "/-."; ch = *cp++;) ! 241: { ord = (ch == '.' ? 0 : 1); /* n/m = D/M or M/D */ ! 242: if(btoken.tbrk == ch) /* "NN-" */ ! 243: { if(btoken.tbrkl != ch) ! 244: { if(ptitoken(btoken.tcp+btoken.tcnt,&atoken) ! 245: && atoken.tflg == 0 ! 246: && atoken.tval.ttmw->wtype == TM_MON) ! 247: goto dd2; ! 248: if(ord)goto mm2; else goto dd2; /* "NN-" */ ! 249: } /* "-NN-" */ ! 250: if(tp[TM_DAY] == TMNULL ! 251: && tp[TM_YEAR] != TMNULL) /* If "YY-NN-" */ ! 252: goto mm2; /* then always MM */ ! 253: if(ord)goto dd2; else goto mm2; ! 254: } ! 255: if(btoken.tbrkl == ch /* "-NN" */ ! 256: && tp[ord ? TM_MON : TM_DAY] != TMNULL) ! 257: if(tp[ord ? TM_DAY : TM_MON] == TMNULL) /* MM/DD */ ! 258: if(ord)goto dd2; else goto mm2; ! 259: else goto yy2; /* "-YY" */ ! 260: } ! 261: ! 262: /* At this point only YY, DD, and HH are left. ! 263: * YY is very unlikely since value is <= 32 and there was ! 264: * no numerical format date. Make one last try at YY ! 265: * before dropping through to DD vs HH code. ! 266: */ ! 267: if(btoken.tcnt == 2 /* If 2 digits */ ! 268: && tp[TM_HOUR] != TMNULL /* and already have hour */ ! 269: && tp[TM_DAY] != TMNULL /* and day, but */ ! 270: && tp[TM_YEAR] == TMNULL) /* no year, then assume */ ! 271: goto yy2; /* that's what we have. */ ! 272: ! 273: /* Now reduced to choice between HH and DD */ ! 274: if(tp[TM_HOUR] != TMNULL) goto dd2; /* Have hour? Assume day. */ ! 275: if(tp[TM_DAY] != TMNULL) goto hh2; /* Have day? Assume hour. */ ! 276: if(i > 24) goto dd2; /* Impossible HH means DD */ ! 277: if(!ptitoken(btoken.tcp+btoken.tcnt, &atoken)) /* Read ahead! */ ! 278: if(atoken.tval.tnum) return(0); /* ERR: bad token */ ! 279: else goto dd2; /* EOF, assume day. */ ! 280: if( atoken.tflg == 0 /* If next token is an alpha */ ! 281: && atoken.tval.ttmw->wflgs&TWTIME) /* time-spec, assume hour */ ! 282: goto hh2; /* e.g. "3 PM", "11-EDT" */ ! 283: ! 284: dd2: if(ptstash(&tp[TM_DAY],i)) /* Store day (1 based) */ ! 285: return(0); ! 286: goto domore; ! 287: ! 288: mm2: if(ptstash(&tp[TM_MON], i-1)) /* Store month (make zero based) */ ! 289: return(0); ! 290: goto domore; ! 291: ! 292: yy2: i += 1900; ! 293: year4: if(ptstash(&tp[TM_YEAR],i)) /* Store year (full number) */ ! 294: return(0); /* ERR: year conflict */ ! 295: goto domore; ! 296: ! 297: /* Hack HH:MM[[:]SS] */ ! 298: coltime: ! 299: if(ptstash(&tp[TM_HOUR],i)) return(0); ! 300: if(!ptitoken(btoken.tcp+btoken.tcnt,&btoken)) ! 301: return(!btoken.tval.tnum); ! 302: if(!btoken.tflg) return(0); /* ERR: HH:<alpha> */ ! 303: if(btoken.tcnt == 4) /* MMSS */ ! 304: if(ptstash(&tp[TM_MIN],btoken.tval.tnum/100) ! 305: || ptstash(&tp[TM_SEC],btoken.tval.tnum%100)) ! 306: return(0); ! 307: else goto domore; ! 308: if(btoken.tcnt != 2 ! 309: || ptstash(&tp[TM_MIN],btoken.tval.tnum)) ! 310: return(0); /* ERR: MM bad */ ! 311: if(btoken.tbrk != ':') goto domore; /* Seconds follow? */ ! 312: coltm2: if(!ptitoken(btoken.tcp+btoken.tcnt,&btoken)) ! 313: return(!btoken.tval.tnum); ! 314: if(!btoken.tflg || btoken.tcnt != 2 /* Verify SS */ ! 315: || ptstash(&tp[TM_SEC], btoken.tval.tnum)) ! 316: return(0); /* ERR: SS bad */ ! 317: goto domore; ! 318: } ! 319: ! 320: /* Store date/time value, return 0 if successful. ! 321: * Fails if entry already set to a different value. ! 322: */ ! 323: ptstash(adr,val) ! 324: int *adr; ! 325: { register int *a; ! 326: if( *(a=adr) != TMNULL) ! 327: return(*a != val); ! 328: *a = val; ! 329: return(0); ! 330: } ! 331: ! 332: /* This subroutine is invoked for NOON or MIDNIGHT when wrapping up ! 333: * just prior to returning from partime. ! 334: */ ! 335: pt12hack(atp, aval) ! 336: int *atp, aval; ! 337: { register int *tp, i, h; ! 338: tp = atp; ! 339: if (((i=tp[TM_MIN]) && i != TMNULL) /* Ensure mins, secs */ ! 340: || ((i=tp[TM_SEC]) && i != TMNULL)) /* are 0 or unspec'd */ ! 341: return(0); /* ERR: MM:SS not 00:00 */ ! 342: i = aval; /* Get 0 or 12 (midnite or noon) */ ! 343: if ((h = tp[TM_HOUR]) == TMNULL /* If hour unspec'd, win */ ! 344: || h == 12) /* or if 12:00 (matches either) */ ! 345: tp[TM_HOUR] = i; /* Then set time */ ! 346: else if(!(i == 0 /* Nope, but if midnight and */ ! 347: &&(h == 0 || h == 24))) /* time matches, can pass. */ ! 348: return(0); /* ERR: HH conflicts */ ! 349: tp[TM_AMPM] = TMNULL; /* Always reset this value if won */ ! 350: return(1); ! 351: } ! 352: ! 353: /* Null routine for no-op tokens */ ! 354: ! 355: ptnoise() { return(1); } ! 356: ! 357: /* Get a token and identify it to some degree. ! 358: * Returns 0 on failure; token.tval will be 0 for normal EOF, otherwise ! 359: * hit error of some sort ! 360: */ ! 361: ! 362: ptitoken(astr, tkp) ! 363: register struct token *tkp; ! 364: char *astr; ! 365: { ! 366: register char *cp; ! 367: register int i; ! 368: ! 369: tkp->tval.tnum = 0; ! 370: if(pttoken(astr,tkp) == 0) ! 371: #ifdef DEBUG ! 372: VOID printf("EOF\n"); ! 373: #endif DEBUG ! 374: return(0); ! 375: cp = tkp->tcp; ! 376: ! 377: #ifdef DEBUG ! 378: i = cp[tkp->tcnt]; ! 379: cp[tkp->tcnt] = 0; ! 380: VOID printf("Token: \"%s\" ",cp); ! 381: cp[tkp->tcnt] = i; ! 382: #endif DEBUG ! 383: ! 384: if(tkp->tflg) ! 385: for(i = tkp->tcnt; i > 0; i--) ! 386: tkp->tval.tnum = (int)tkp->tval.tnum*10 + ((*cp++)-'0'); ! 387: else ! 388: { i = ptmatchstr(cp, tkp->tcnt, tmwords); ! 389: tkp->tval.tnum = i ? i : -1; /* Set -1 for error */ ! 390: ! 391: #ifdef DEBUG ! 392: if(!i) VOID printf("Not found!\n"); ! 393: #endif DEBUG ! 394: ! 395: if(!i) return(0); ! 396: } ! 397: ! 398: #ifdef DEBUG ! 399: if(tkp->tflg) ! 400: VOID printf("Val: %d.\n",tkp->tval.tnum); ! 401: else VOID printf("Found: \"%s\", val: %d., type %d\n", ! 402: tkp->tval.ttmw->went,tkp->tval.ttmw->wval,tkp->tval.ttmw->wtype); ! 403: #endif DEBUG ! 404: ! 405: return(1); ! 406: } ! 407: ! 408: /* Read token from input string into token structure */ ! 409: pttoken(astr,tkp) ! 410: register struct token *tkp; ! 411: char *astr; ! 412: { ! 413: register char *cp; ! 414: register int c; ! 415: ! 416: tkp->tcp = cp = astr; ! 417: tkp->tbrkl = tkp->tbrk; /* Set "last break" */ ! 418: tkp->tcnt = tkp->tbrk = tkp->tflg = 0; ! 419: ! 420: while(c = *cp++) ! 421: { switch(c) ! 422: { case ' ': case '\t': /* Flush all whitespace */ ! 423: while((c = *cp++) && isspace(c)); ! 424: cp--; /* Drop thru to handle brk */ ! 425: case '(': case ')': /* Perhaps any non-alphanum */ ! 426: case '-': case ',': /* shd qualify as break? */ ! 427: case '/': case ':': case '.': /* Break chars */ ! 428: if(tkp->tcnt == 0) /* If no token yet */ ! 429: { tkp->tcp = cp; /* ignore the brk */ ! 430: tkp->tbrkl = c; ! 431: continue; /* and go on. */ ! 432: } ! 433: tkp->tbrk = c; ! 434: return(tkp->tcnt); ! 435: } ! 436: if(tkp->tcnt == 0) /* If first char of token, */ ! 437: tkp->tflg = isdigit(c); /* determine type */ ! 438: if(( isdigit(c) && tkp->tflg) /* If not first, make sure */ ! 439: ||(!isdigit(c) && !tkp->tflg)) /* char matches type */ ! 440: tkp->tcnt++; /* Win, add to token. */ ! 441: else { ! 442: cp--; /* Wrong type, back up */ ! 443: tkp->tbrk = c; ! 444: return(tkp->tcnt); ! 445: } ! 446: } ! 447: return(tkp->tcnt); /* When hit EOF */ ! 448: } ! 449: ! 450: ! 451: ptmatchstr(astr,cnt,astruc) ! 452: char *astr; ! 453: int cnt; ! 454: struct tmwent *astruc; ! 455: { register char *cp, *mp; ! 456: register int c; ! 457: struct tmwent *lastptr; ! 458: struct integ { int word; }; /* For getting at array ptr */ ! 459: int i; ! 460: ! 461: lastptr = 0; ! 462: for(;mp = (char *)((struct integ *)astruc)->word; astruc += 1) ! 463: { cp = astr; ! 464: for(i = cnt; i > 0; i--) ! 465: { switch((c = *cp++) ^ *mp++) /* XOR the chars */ ! 466: { case 0: continue; /* Exact match */ ! 467: case 040: if(isalpha(c)) ! 468: continue; ! 469: } ! 470: break; ! 471: } ! 472: if(i==0) ! 473: if(*mp == 0) return((unsigned int)astruc); /* Exact match */ ! 474: else if(lastptr) return(0); /* Ambiguous */ ! 475: else lastptr = astruc; /* 1st ambig */ ! 476: } ! 477: return((unsigned int)lastptr); ! 478: } ! 479: ! 480: ! 481: ! 482: zaptime(tp) ! 483: register int *tp; ! 484: /* clears tm structure pointed to by tp */ ! 485: { register int i; ! 486: i = (sizeof (struct tm))/(sizeof (int)); ! 487: do *tp++ = TMNULL; /* Set entry to "unspecified" */ ! 488: while(--i); /* Faster than FOR */ ! 489: }
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