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