501 lines
12 KiB
C++
501 lines
12 KiB
C++
// This may look like C code, but it is really -*- C++ -*-
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// ------------------------------------------------------------------
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// The Goldware Library
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// Copyright (C) 1990-1999 Odinn Sorensen
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// Copyright (C) 1999-2000 Alexander S. Aganichev
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// ------------------------------------------------------------------
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this program; if not, write to the Free
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// Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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// MA 02111-1307, USA
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// ------------------------------------------------------------------
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// $Id$
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// ------------------------------------------------------------------
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// Time utility functions.
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// ------------------------------------------------------------------
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#include <cstdarg>
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#include <cstdio>
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#include <gmemall.h>
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#include <gstrall.h>
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#include <gtimall.h>
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#include <gutlmisc.h>
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#include <gutlmtsk.h>
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#ifdef __OS2__
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#define INCL_BASE
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#include <os2.h>
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#endif
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#ifdef __WIN32__
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#include <windows.h>
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#endif
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// ------------------------------------------------------------------
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const char* gmonths[] = {
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"ERR",
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"Jan", "Feb", "Mar",
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"Apr", "May", "Jun",
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"Jul", "Aug", "Sep",
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"Oct", "Nov", "Dec",
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"ERR"
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};
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// ------------------------------------------------------------------
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// Returns current timezone offset based on TZ environment variable.
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int tzoffset()
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{
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time32_t t1 = gtime(NULL);
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struct tm tp; ggmtime(&tp, &t1);
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tp.tm_isdst = -1;
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time32_t t2 = gmktime(&tp);
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int dt = (int)(t1 - t2);
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return (dt / 3600) * 100 + (dt % 3600) / 60;
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}
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// ------------------------------------------------------------------
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char* __gampm[2] = {
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"AM", "PM"
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};
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char* __gsweekday[7] = {
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"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
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};
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char* __glweekday[7] = {
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"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"
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};
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char* __gsmonth[12] = {
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"Jan", "Feb", "Mar", "Apr", "May", "Jun",
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"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
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};
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char* __glmonth[12] = {
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"January", "February", "March", "April", "May", "June",
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"July", "August", "September", "October", "November", "December"
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};
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char* gampm[2] = {
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"AM", "PM"
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};
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char* gsweekday[7] = {
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NULL, NULL, NULL, NULL, NULL, NULL, NULL
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};
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char* glweekday[7] = {
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NULL, NULL, NULL, NULL, NULL, NULL, NULL
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};
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char* gsmonth[12] = {
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
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};
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char* glmonth[12] = {
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
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};
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// ------------------------------------------------------------------
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// written 6 september 1989 by jim nutt
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// released into the public domain by jim nutt
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// modified 21-Oct-89 by Rob Duff
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static char buf[26];
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static char format[] = "%?";
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static int gpow[5] = { 1, 10, 100, 1000, 10000 };
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// ------------------------------------------------------------------
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// static void strfmt(char *str, char *fmt);
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// simple sprintf for strftime
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// each format descriptor is of the form %n
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// where n goes from zero to four
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// 0 -- string %s
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// 1..4 -- int %?.?d
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static void strfmt(char *str, const char *fmt, ...) {
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int ival, ilen;
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char *sval;
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va_list vp;
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va_start(vp, fmt);
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while(*fmt) {
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if(*fmt++ == '%') {
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ilen = *fmt++ - '0';
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if(ilen == 0) // zero means string arg
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{
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sval = va_arg(vp, char*);
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while(*sval)
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*str++ = *sval++;
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}
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else { // always leading zeros
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if(ilen == ('-' - '0')) {
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ilen = *fmt++ - '0';
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ival = va_arg(vp, int);
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bool padding = true;
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while(ilen) {
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ival %= gpow[ilen];
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int cval = ival / gpow[ilen-1];
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if(cval)
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padding = false;
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if(--ilen and padding)
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cval = ' ' - '0';
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*str++ = (char)('0' + cval);
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}
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}
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else {
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ival = va_arg(vp, int);
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while(ilen) {
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ival %= gpow[ilen--];
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*str++ = (char)('0' + ival / gpow[ilen]);
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}
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}
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}
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}
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else *str++ = fmt[-1];
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}
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*str = '\0';
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va_end(vp);
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}
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// ------------------------------------------------------------------
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// In differ to ANSI C strftime this function supports reloading of
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// field names
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// Return NULL if output truncated, otherwize return s.
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#define setvar(internal,external,field) \
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char **internal = external; \
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if(internal[field] == NULL) internal = __##external;
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char *strftimei(char *s, size_t maxs, const char *f, const struct tm *t)
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{
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char *p, *q, *r;
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setvar(aday, gsweekday, t->tm_wday);
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setvar(day, glweekday, t->tm_wday);
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setvar(amonth, gsmonth, t->tm_mon);
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setvar(month, glmonth, t->tm_mon);
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p = s;
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q = s + maxs - 1;
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while((*f != NUL)) {
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if(*f++ == '%') {
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r = buf;
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switch(*f++) {
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case '%':
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format[1] = NUL;
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r = format;
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break;
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case 'a':
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r = aday[t->tm_wday];
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break;
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case 'A':
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r = day[t->tm_wday];
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break;
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case 'b':
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r = amonth[t->tm_mon];
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break;
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case 'B':
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r = month[t->tm_mon];
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break;
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case 'C':
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strfmt(r, "%0 %0 %-2 %2:%2:%2 %4",
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aday[t->tm_wday], amonth[t->tm_mon],
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t->tm_mday,t->tm_hour, t->tm_min,
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t->tm_sec, t->tm_year+1900);
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break;
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case 'e':
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strfmt(r, "%-2", t->tm_mday);
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break;
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case 'E':
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sprintf(r, "%u", (uint)t->tm_mday);
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break;
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case 'p':
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r = gampm[(t->tm_hour>11)?1:0];
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break;
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default:
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format[1] = f[-1];
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if(strftime(r, 26, format, t) == 0) {
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buf[0] = '%'; // reconstruct the format
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buf[1] = f[-1];
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buf[2] = '\0';
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if(buf[1] == 0)
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f--; // back up if at end of string
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}
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break;
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}
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while(*r) {
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if(p == q) {
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*q = '\0';
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return 0;
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}
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*p++ = *r++;
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}
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}
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else {
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if(p == q) {
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*q = '\0';
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return 0;
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}
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*p++ = f[-1];
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}
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}
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*p = '\0';
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return s;
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}
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// ------------------------------------------------------------------
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// Convert string-month to integer
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int str2mon(const char* ptr) {
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int mon;
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switch(g_toupper(*ptr)) {
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case 'A':
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if(g_toupper(ptr[1]) == 'P')
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mon = 4;
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else
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mon = 8;
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break;
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case 'D':
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mon = 12;
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break;
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case 'F':
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mon = 2;
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break;
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case 'J':
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if(g_toupper(ptr[1]) == 'A')
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mon = 1;
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else if(g_toupper(ptr[2]) == 'L')
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mon = 7;
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else
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mon = 6;
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break;
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case 'M':
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if(g_toupper(ptr[2]) == 'R')
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mon = 3;
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else
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mon = 5;
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break;
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case 'N':
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mon = 11;
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break;
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case 'O':
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mon = 10;
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break;
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case 'S':
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mon = 9;
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break;
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default:
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mon = 0;
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}
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return mon;
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}
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// ------------------------------------------------------------------
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time32_t FTimeToTime(FTime* __ftime, struct tm* __tm) {
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struct tm _tm;
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uint32_t _time = 0;
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if(__tm == NULL)
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__tm = &_tm;
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// Only try to convert a valid date
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if(__ftime->ft_year >= 5) { // FidoNet standards didn't exist before 1985
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if((__ftime->ft_day >= 1) and (__ftime->ft_day <= 31)) {
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if((__ftime->ft_month >= 1) and (__ftime->ft_month <= 12)) {
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__tm->tm_year = __ftime->ft_year + 80;
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__tm->tm_mon = __ftime->ft_month - 1;
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__tm->tm_mday = __ftime->ft_day;
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__tm->tm_hour = __ftime->ft_hour;
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__tm->tm_min = __ftime->ft_min;
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__tm->tm_sec = __ftime->ft_tsec * 2;
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__tm->tm_isdst = -1;
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time32_t a = gmktime(__tm);
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struct tm tp; ggmtime(&tp, &a);
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tp.tm_isdst = -1;
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time32_t b = gmktime(&tp);
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_time = a + a - b;
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if(_time == (uint32_t)0xFFFFFFFFL)
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_time = 0;
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}
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}
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}
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return _time;
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}
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// ------------------------------------------------------------------
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FTime TimeToFTime(time32_t __time) {
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FTime _ft;
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memset(&_ft, 0, sizeof(FTime));
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if (__time)
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{
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struct tm _tmp; ggmtime(&_tmp, &__time);
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_ft.ft_year = (word)(_tmp.tm_year - 80);
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_ft.ft_month = (word)(_tmp.tm_mon + 1);
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_ft.ft_day = (word)(_tmp.tm_mday);
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_ft.ft_hour = (word)(_tmp.tm_hour);
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_ft.ft_min = (word)(_tmp.tm_min);
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_ft.ft_tsec = (word)(_tmp.tm_sec / 2);
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}
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return _ft;
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}
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// ------------------------------------------------------------------
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time32_t FidoTimeToUnix(char* ptr) {
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bool date_ok = false;
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int year=0, month=0, day=0;
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int hour=0, minute=0, second=0;
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ptr = strskip_wht(ptr);
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if(not isdigit(*ptr)) {
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// Skip past weekday string (SEA format)
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ptr = strskip_wht(strskip_txt(ptr));
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}
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if(*ptr) {
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if(isdigit(*ptr)) {
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day = atoi(ptr);
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ptr = strskip_wht(strskip_txt(ptr));
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if(g_isalpha(*ptr)) {
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month = str2mon(ptr);
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if(month) {
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ptr = strskip_wht(strskip_txt(ptr));
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if(isdigit(*ptr)) {
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year = atoi(ptr);
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ptr = strskip_wht(strskip_txt(ptr));
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if(isdigit(*ptr)) {
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hour = atoi(ptr);
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ptr = strskip_digits(ptr);
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if(*ptr and isdigit(ptr[1])) {
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minute = atoi(++ptr);
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date_ok = true;
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// The seconds part is only in the FTS-1 format
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ptr = strskip_digits(ptr);
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if(*ptr and isdigit(ptr[1])) {
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second = atoi(++ptr);
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}
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}
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}
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}
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}
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}
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}
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}
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// Convert datetime to UNIX timestamp
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if(date_ok) {
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struct tm t;
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t.tm_year = (year < 80) ? (year+100) : year;
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t.tm_mon = month - 1;
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t.tm_mday = day;
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t.tm_hour = hour;
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t.tm_min = minute;
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t.tm_sec = second;
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t.tm_isdst = -1;
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time32_t a = gmktime(&t);
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struct tm tp; ggmtime(&tp, &a);
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tp.tm_isdst = -1;
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time32_t b = gmktime(&tp);
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return a + a - b;
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}
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return (uint32_t)-1;
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}
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// ------------------------------------------------------------------
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char* TimeToStr(char* buf, time32_t t)
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{
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struct tm tm; ggmtime(&tm, &t);
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return strftimei(buf, 20, "%Y-%m-%d %H:%M:%S", &tm);
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}
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// ------------------------------------------------------------------
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char* FTimeToStr(char* buf, FTime& t) {
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sprintf(buf, "%04u-%02u-%02u %02u:%02u:%02u",
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t.ft_year+1980, t.ft_month, t.ft_day,
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t.ft_hour, t.ft_min, t.ft_tsec*2
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);
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return buf;
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}
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// ------------------------------------------------------------------
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const char* gfiletime::c_str(char* buf) {
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sprintf(buf, "%04u-%02u-%02u %02u:%02u:%02u",
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ft_year+1980, ft_month, ft_day,
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ft_hour, ft_min, ft_tsec*2
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);
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return buf;
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}
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// ------------------------------------------------------------------
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const char* gopustime::c_str(char* buf) {
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sprintf(buf, "%04u-%02u-%02u %02u:%02u:%02u",
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ft_year+1980, ft_month, ft_day,
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ft_hour, ft_min, ft_tsec*2
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);
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return buf;
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}
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// ------------------------------------------------------------------
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