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- /*
- * Copyright (c) 1989 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that: (1) source distributions retain this entire copyright
- * notice and comment, and (2) distributions including binaries display
- * the following acknowledgement: ``This product includes software
- * developed by the University of California, Berkeley and its contributors''
- * in the documentation or other materials provided with the distribution
- * and in all advertising materials mentioning features or use of this
- * software. Neither the name of the University nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
- #if defined(LIBC_SCCS) && !defined(lint)
- static char sccsid[] = "@(#)strftime.c 5.8 (Berkeley) 6/1/90";
- #endif /* LIBC_SCCS and not lint */
-
- /*
- * NOTE: I used the older version of this file, since the 4.3bsd-net2
- * version uses mktime() from ctime.c, and ctime.c is badly suited
- * for inclusion in a shared library (too much static stuff...)
- */
-
-
- #define KERNEL
- #include "ixemul.h"
-
- #include <sys/types.h>
- #include <sys/time.h>
- #include <time.h>
- #include <tzfile.h>
- #include <string.h>
-
- static char *afmt[] = {
- "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat",
- };
- static char *Afmt[] = {
- "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday",
- "Saturday",
- };
- static char *bfmt[] = {
- "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep",
- "Oct", "Nov", "Dec",
- };
- static char *Bfmt[] = {
- "January", "February", "March", "April", "May", "June", "July",
- "August", "September", "October", "November", "December",
- };
-
- static size_t gsize;
- static char *pt;
-
- size_t
- strftime(s, maxsize, format, t)
- char *s;
- const char *format;
- size_t maxsize;
- const struct tm *t;
- {
- size_t _fmt();
- size_t res;
-
- ix_lock_base ();
-
- pt = s;
- if ((gsize = maxsize) < 1)
- {
- res = 0;
- goto unlock;
- }
- if (_fmt(format, t)) {
- *pt = '\0';
- res = maxsize - gsize;
- goto unlock;
- }
- res = 0;
-
- unlock:
- ix_unlock_base ();
- return res;
- }
-
- static size_t
- _fmt(format, t)
- register char *format;
- struct tm *t;
- {
- for (; *format; ++format) {
- if (*format == '%')
- switch(*++format) {
- case '\0':
- --format;
- break;
- case 'A':
- if (t->tm_wday < 0 || t->tm_wday > 6)
- return(0);
- if (!_add(Afmt[t->tm_wday]))
- return(0);
- continue;
- case 'a':
- if (t->tm_wday < 0 || t->tm_wday > 6)
- return(0);
- if (!_add(afmt[t->tm_wday]))
- return(0);
- continue;
- case 'B':
- if (t->tm_mon < 0 || t->tm_mon > 11)
- return(0);
- if (!_add(Bfmt[t->tm_mon]))
- return(0);
- continue;
- case 'b':
- case 'h':
- if (t->tm_mon < 0 || t->tm_mon > 11)
- return(0);
- if (!_add(bfmt[t->tm_mon]))
- return(0);
- continue;
- case 'C':
- if (!_fmt("%a %b %e %H:%M:%S %Y", t))
- return(0);
- continue;
- case 'c':
- if (!_fmt("%m/%d/%y %H:%M:%S", t))
- return(0);
- continue;
- case 'e':
- if (!_conv(t->tm_mday, 2, ' '))
- return(0);
- continue;
- case 'D':
- if (!_fmt("%m/%d/%y", t))
- return(0);
- continue;
- case 'd':
- if (!_conv(t->tm_mday, 2, '0'))
- return(0);
- continue;
- case 'H':
- if (!_conv(t->tm_hour, 2, '0'))
- return(0);
- continue;
- case 'I':
- if (!_conv(t->tm_hour % 12 ?
- t->tm_hour % 12 : 12, 2, '0'))
- return(0);
- continue;
- case 'j':
- if (!_conv(t->tm_yday + 1, 3, '0'))
- return(0);
- continue;
- case 'k':
- if (!_conv(t->tm_hour, 2, ' '))
- return(0);
- continue;
- case 'l':
- if (!_conv(t->tm_hour % 12 ?
- t->tm_hour % 12 : 12, 2, ' '))
- return(0);
- continue;
- case 'M':
- if (!_conv(t->tm_min, 2, '0'))
- return(0);
- continue;
- case 'm':
- if (!_conv(t->tm_mon + 1, 2, '0'))
- return(0);
- continue;
- case 'n':
- if (!_add("\n"))
- return(0);
- continue;
- case 'p':
- if (!_add(t->tm_hour >= 12 ? "PM" : "AM"))
- return(0);
- continue;
- case 'R':
- if (!_fmt("%H:%M", t))
- return(0);
- continue;
- case 'r':
- if (!_fmt("%I:%M:%S %p", t))
- return(0);
- continue;
- case 'S':
- if (!_conv(t->tm_sec, 2, '0'))
- return(0);
- continue;
- case 'T':
- case 'X':
- if (!_fmt("%H:%M:%S", t))
- return(0);
- continue;
- case 't':
- if (!_add("\t"))
- return(0);
- continue;
- case 'U':
- if (!_conv((t->tm_yday + 7 - t->tm_wday) / 7,
- 2, '0'))
- return(0);
- continue;
- case 'W':
- if (!_conv((t->tm_yday + 7 -
- (t->tm_wday ? (t->tm_wday - 1) : 6))
- / 7, 2, '0'))
- return(0);
- continue;
- case 'w':
- if (!_conv(t->tm_wday, 1, '0'))
- return(0);
- continue;
- case 'x':
- if (!_fmt("%m/%d/%y", t))
- return(0);
- continue;
- case 'y':
- if (!_conv((t->tm_year + TM_YEAR_BASE)
- % 100, 2, '0'))
- return(0);
- continue;
- case 'Y':
- if (!_conv(t->tm_year + TM_YEAR_BASE, 4, '0'))
- return(0);
- continue;
- case 'Z':
- if (!t->tm_zone || !_add(t->tm_zone))
- return(0);
- continue;
- case '%':
- /*
- * X311J/88-090 (4.12.3.5): if conversion char is
- * undefined, behavior is undefined. Print out the
- * character itself as printf(3) does.
- */
- default:
- break;
- }
- if (!gsize--)
- return(0);
- *pt++ = *format;
- }
- return(gsize);
- }
-
- static
- _conv(n, digits, pad)
- int n, digits;
- char pad;
- {
- static char buf[10];
- register char *p;
-
- for (p = buf + sizeof(buf) - 2; n > 0 && p > buf; n /= 10, --digits)
- *p-- = n % 10 + '0';
- while (p > buf && digits-- > 0)
- *p-- = pad;
- return(_add(++p));
- }
-
- static
- _add(str)
- register char *str;
- {
- for (;; ++pt, --gsize) {
- if (!gsize)
- return(0);
- if (!(*pt = *str++))
- return(1);
- }
- }
-