/* * Copyright (c) 1989 The Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #if defined(LIBC_SCCS) && !defined(lint) static char sccsid[] = "@(#)strftime.c 5.11 (Berkeley) 2/24/91"; #endif /* LIBC_SCCS and not lint */ #include #include #include #include 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; static int _add(register char *), _conv(int, int, char), _secs(struct tm *); static size_t _fmt(register char *, struct tm *); size_t strftime(char *s, size_t maxsize, const char *format, const struct tm *t) { pt = s; if ((gsize = maxsize) < 1) return (0); if (_fmt(format, t)) { *pt = '\0'; return (maxsize - gsize); } return (0); } static size_t _fmt(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 'D': if (!_fmt("%m/%d/%y", t)) return (0); continue; case 'd': if (!_conv(t->tm_mday, 2, '0')) return (0); continue; case 'e': if (!_conv(t->tm_mday, 2, ' ')) 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 's': if (!_secs(t)) 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 _secs(struct tm *t) { static char buf[15]; register time_t s; register char *p; struct tm tmp; /* Make a copy, mktime(3) modifies the tm struct. */ tmp = *t; s = mktime(&tmp); for (p = buf + sizeof(buf) - 2; s > 0 && p > buf; s /= 10) *p-- = s % 10 + '0'; return (_add(++p)); } static _conv(int n, int 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(register char *str) { for (;; ++pt, --gsize) { if (!gsize) return (0); if (!(*pt = *str++)) return (1); } }