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1.1 ! root 1: /* ! 2: * Copyright (c) 1989 The Regents of the University of California. ! 3: * All rights reserved. ! 4: * ! 5: * Redistribution and use in source and binary forms are permitted ! 6: * provided that: (1) source distributions retain this entire copyright ! 7: * notice and comment, and (2) distributions including binaries display ! 8: * the following acknowledgement: ``This product includes software ! 9: * developed by the University of California, Berkeley and its contributors'' ! 10: * in the documentation or other materials provided with the distribution ! 11: * and in all advertising materials mentioning features or use of this ! 12: * software. Neither the name of the University nor the names of its ! 13: * contributors may be used to endorse or promote products derived ! 14: * from this software without specific prior written permission. ! 15: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR ! 16: * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED ! 17: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. ! 18: */ ! 19: ! 20: #if defined(LIBC_SCCS) && !defined(lint) ! 21: static char sccsid[] = "@(#)strftime.c 5.8 (Berkeley) 6/1/90"; ! 22: #endif /* LIBC_SCCS and not lint */ ! 23: ! 24: #include <sys/types.h> ! 25: #include <sys/time.h> ! 26: #include <tzfile.h> ! 27: #include <string.h> ! 28: ! 29: static char *afmt[] = { ! 30: "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", ! 31: }; ! 32: static char *Afmt[] = { ! 33: "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", ! 34: "Saturday", ! 35: }; ! 36: static char *bfmt[] = { ! 37: "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", ! 38: "Oct", "Nov", "Dec", ! 39: }; ! 40: static char *Bfmt[] = { ! 41: "January", "February", "March", "April", "May", "June", "July", ! 42: "August", "September", "October", "November", "December", ! 43: }; ! 44: ! 45: static size_t gsize; ! 46: static char *pt; ! 47: ! 48: size_t ! 49: strftime(s, maxsize, format, t) ! 50: char *s; ! 51: char *format; ! 52: size_t maxsize; ! 53: struct tm *t; ! 54: { ! 55: size_t _fmt(); ! 56: ! 57: pt = s; ! 58: if ((gsize = maxsize) < 1) ! 59: return(0); ! 60: if (_fmt(format, t)) { ! 61: *pt = '\0'; ! 62: return(maxsize - gsize); ! 63: } ! 64: return(0); ! 65: } ! 66: ! 67: static size_t ! 68: _fmt(format, t) ! 69: register char *format; ! 70: struct tm *t; ! 71: { ! 72: for (; *format; ++format) { ! 73: if (*format == '%') ! 74: switch(*++format) { ! 75: case '\0': ! 76: --format; ! 77: break; ! 78: case 'A': ! 79: if (t->tm_wday < 0 || t->tm_wday > 6) ! 80: return(0); ! 81: if (!_add(Afmt[t->tm_wday])) ! 82: return(0); ! 83: continue; ! 84: case 'a': ! 85: if (t->tm_wday < 0 || t->tm_wday > 6) ! 86: return(0); ! 87: if (!_add(afmt[t->tm_wday])) ! 88: return(0); ! 89: continue; ! 90: case 'B': ! 91: if (t->tm_mon < 0 || t->tm_mon > 11) ! 92: return(0); ! 93: if (!_add(Bfmt[t->tm_mon])) ! 94: return(0); ! 95: continue; ! 96: case 'b': ! 97: case 'h': ! 98: if (t->tm_mon < 0 || t->tm_mon > 11) ! 99: return(0); ! 100: if (!_add(bfmt[t->tm_mon])) ! 101: return(0); ! 102: continue; ! 103: case 'C': ! 104: if (!_fmt("%a %b %e %H:%M:%S %Y", t)) ! 105: return(0); ! 106: continue; ! 107: case 'c': ! 108: if (!_fmt("%m/%d/%y %H:%M:%S", t)) ! 109: return(0); ! 110: continue; ! 111: case 'e': ! 112: if (!_conv(t->tm_mday, 2, ' ')) ! 113: return(0); ! 114: continue; ! 115: case 'D': ! 116: if (!_fmt("%m/%d/%y", t)) ! 117: return(0); ! 118: continue; ! 119: case 'd': ! 120: if (!_conv(t->tm_mday, 2, '0')) ! 121: return(0); ! 122: continue; ! 123: case 'H': ! 124: if (!_conv(t->tm_hour, 2, '0')) ! 125: return(0); ! 126: continue; ! 127: case 'I': ! 128: if (!_conv(t->tm_hour % 12 ? ! 129: t->tm_hour % 12 : 12, 2, '0')) ! 130: return(0); ! 131: continue; ! 132: case 'j': ! 133: if (!_conv(t->tm_yday + 1, 3, '0')) ! 134: return(0); ! 135: continue; ! 136: case 'k': ! 137: if (!_conv(t->tm_hour, 2, ' ')) ! 138: return(0); ! 139: continue; ! 140: case 'l': ! 141: if (!_conv(t->tm_hour % 12 ? ! 142: t->tm_hour % 12 : 12, 2, ' ')) ! 143: return(0); ! 144: continue; ! 145: case 'M': ! 146: if (!_conv(t->tm_min, 2, '0')) ! 147: return(0); ! 148: continue; ! 149: case 'm': ! 150: if (!_conv(t->tm_mon + 1, 2, '0')) ! 151: return(0); ! 152: continue; ! 153: case 'n': ! 154: if (!_add("\n")) ! 155: return(0); ! 156: continue; ! 157: case 'p': ! 158: if (!_add(t->tm_hour >= 12 ? "PM" : "AM")) ! 159: return(0); ! 160: continue; ! 161: case 'R': ! 162: if (!_fmt("%H:%M", t)) ! 163: return(0); ! 164: continue; ! 165: case 'r': ! 166: if (!_fmt("%I:%M:%S %p", t)) ! 167: return(0); ! 168: continue; ! 169: case 'S': ! 170: if (!_conv(t->tm_sec, 2, '0')) ! 171: return(0); ! 172: continue; ! 173: case 'T': ! 174: case 'X': ! 175: if (!_fmt("%H:%M:%S", t)) ! 176: return(0); ! 177: continue; ! 178: case 't': ! 179: if (!_add("\t")) ! 180: return(0); ! 181: continue; ! 182: case 'U': ! 183: if (!_conv((t->tm_yday + 7 - t->tm_wday) / 7, ! 184: 2, '0')) ! 185: return(0); ! 186: continue; ! 187: case 'W': ! 188: if (!_conv((t->tm_yday + 7 - ! 189: (t->tm_wday ? (t->tm_wday - 1) : 6)) ! 190: / 7, 2, '0')) ! 191: return(0); ! 192: continue; ! 193: case 'w': ! 194: if (!_conv(t->tm_wday, 1, '0')) ! 195: return(0); ! 196: continue; ! 197: case 'x': ! 198: if (!_fmt("%m/%d/%y", t)) ! 199: return(0); ! 200: continue; ! 201: case 'y': ! 202: if (!_conv((t->tm_year + TM_YEAR_BASE) ! 203: % 100, 2, '0')) ! 204: return(0); ! 205: continue; ! 206: case 'Y': ! 207: if (!_conv(t->tm_year + TM_YEAR_BASE, 4, '0')) ! 208: return(0); ! 209: continue; ! 210: case 'Z': ! 211: if (!t->tm_zone || !_add(t->tm_zone)) ! 212: return(0); ! 213: continue; ! 214: case '%': ! 215: /* ! 216: * X311J/88-090 (4.12.3.5): if conversion char is ! 217: * undefined, behavior is undefined. Print out the ! 218: * character itself as printf(3) does. ! 219: */ ! 220: default: ! 221: break; ! 222: } ! 223: if (!gsize--) ! 224: return(0); ! 225: *pt++ = *format; ! 226: } ! 227: return(gsize); ! 228: } ! 229: ! 230: static ! 231: _conv(n, digits, pad) ! 232: int n, digits; ! 233: char pad; ! 234: { ! 235: static char buf[10]; ! 236: register char *p; ! 237: ! 238: for (p = buf + sizeof(buf) - 2; n > 0 && p > buf; n /= 10, --digits) ! 239: *p-- = n % 10 + '0'; ! 240: while (p > buf && digits-- > 0) ! 241: *p-- = pad; ! 242: return(_add(++p)); ! 243: } ! 244: ! 245: static ! 246: _add(str) ! 247: register char *str; ! 248: { ! 249: for (;; ++pt, --gsize) { ! 250: if (!gsize) ! 251: return(0); ! 252: if (!(*pt = *str++)) ! 253: return(1); ! 254: } ! 255: }
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