mirror of
https://github.com/cc65/cc65.git
synced 2024-06-22 17:29:34 +00:00
Rewrite mktime in assembly
-415 bytes, -39% cycles, Unit test expanded to cover more cases (there was a bug in 2100 before!)
This commit is contained in:
parent
348a9048b7
commit
03d5e5fba0
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@ -1,22 +0,0 @@
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/*
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** _is_leap_year.h
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**
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** (C) Copyright 2024, Colin Leroy-Mira <colin@colino.net>
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**
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*/
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#ifndef __IS_LEAP_YEAR_H
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#define __IS_LEAP_YEAR_H
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unsigned char __fastcall__ IsLeapYear (unsigned char Year);
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/* Returns 1 if the given year is a leap year. Expects a year from 0 to 206,
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* without 1900 added */
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/* End of _is_leap_year.h */
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#endif
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@ -1,23 +0,0 @@
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;
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; Colin Leroy-Mira, 2024
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;
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; unsigned char __fastcall__ IsLeapYear (unsigned char Year)
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; Returns 1 in A if the given year is a leap year. Expects a year from 0 to 206,
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; without 1900 added.
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;
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.export _IsLeapYear
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_IsLeapYear:
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ldx #$00 ; Prepare X for rts
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cmp #$00 ; Y 0 (1900) is not a leap year
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beq NotLeap
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cmp #$C8 ; Y 200 (2100) is not a leap year
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beq NotLeap
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and #$03 ; Year % 4 == 0 means leap year
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bne NotLeap
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lda #$01 ; Return 1
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rts
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NotLeap:
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lda #$00 ; Return 0
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rts
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@ -41,7 +41,7 @@ __time_t_to_tm:
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ldx #.sizeof(tm)-1
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ldx #.sizeof(tm)-1
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: sta TM,x
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: sta TM,x
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dex
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dex
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bne :-
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bpl :-
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; Divide t/86400
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; Divide t/86400
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jsr udiv32
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jsr udiv32
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@ -3,7 +3,7 @@
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; 2002-10-22, Greg King
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; 2002-10-22, Greg King
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;
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;
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; This signed-division function returns both the quotient and the remainder,
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; This signed-division function returns both the quotient and the remainder,
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; in this structure:
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; in this structure: (quotient in sreg, remainder in AX)
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;
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;
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; typedef struct {
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; typedef struct {
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; int rem, quot;
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; int rem, quot;
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/*****************************************************************************/
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/* */
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/* mktime.c */
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/* */
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/* Make calendar time from broken down time and cleanup */
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/* */
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/* */
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/* */
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/* (C) 2002 Ullrich von Bassewitz */
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/* Wacholderweg 14 */
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/* D-70597 Stuttgart */
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/* EMail: uz@musoftware.de */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#include <limits.h>
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#include <stdlib.h>
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#include <time.h>
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#include "_is_leap_year.h"
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/*****************************************************************************/
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/* Data */
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/*****************************************************************************/
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#define JANUARY 0
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#define FEBRUARY 1
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#define DECEMBER 11
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#define JAN_1_1970 4 /* 1/1/1970 is a thursday */
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static const unsigned char MonthLength [] = {
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31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
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};
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static const unsigned MonthDays [] = {
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0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
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};
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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/* use statics for size optimisation (~34 bytes) */
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#pragma static-locals(push, on)
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time_t __fastcall__ mktime (register struct tm* TM)
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/* Make a time in seconds since 1/1/1970 from the broken down time in TM.
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** A call to mktime does also correct the time in TM to contain correct
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** values.
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*/
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{
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register div_t D;
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int Max;
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unsigned DayCount;
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/* Check if TM is valid */
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if (TM == 0) {
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/* Invalid data */
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return (time_t) -1L;
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}
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/* Adjust seconds. */
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D = div (TM->tm_sec, 60);
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TM->tm_sec = D.rem;
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/* Adjust minutes */
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TM->tm_min += D.quot;
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D = div (TM->tm_min, 60);
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TM->tm_min = D.rem;
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/* Adjust hours */
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TM->tm_hour += D.quot;
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D = div (TM->tm_hour, 24);
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TM->tm_hour = D.rem;
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/* Adjust days */
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TM->tm_mday += D.quot;
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/* Adjust year */
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while (1) {
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Max = 365UL + IsLeapYear (TM->tm_year);
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if ((unsigned int)TM->tm_mday > Max) {
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++TM->tm_year;
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TM->tm_mday -= Max;
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} else {
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break;
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}
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}
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/* Adjust month and year. This is an iterative process, since changing
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** the month will change the allowed days for this month.
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*/
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while (1) {
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/* Make sure, month is in the range 0..11 */
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D = div (TM->tm_mon, 12);
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TM->tm_mon = D.rem;
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TM->tm_year += D.quot;
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/* Now check if mday is in the correct range, if not, correct month
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** and eventually year and repeat the process.
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*/
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if (TM->tm_mon == FEBRUARY && IsLeapYear (TM->tm_year)) {
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Max = 29;
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} else {
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Max = MonthLength[TM->tm_mon];
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}
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if ((unsigned int)TM->tm_mday > Max) {
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/* Must correct month and eventually, year */
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if (TM->tm_mon == DECEMBER) {
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TM->tm_mon = JANUARY;
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++TM->tm_year;
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} else {
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++TM->tm_mon;
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}
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TM->tm_mday -= Max;
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} else {
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/* Done */
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break;
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}
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}
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/* Ok, all time/date fields are now correct. Calculate the days in this
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** year.
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*/
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TM->tm_yday = MonthDays[TM->tm_mon] + TM->tm_mday - 1;
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if (TM->tm_mon > FEBRUARY && IsLeapYear (TM->tm_year)) {
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++TM->tm_yday;
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}
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/* Calculate days since 1/1/1970. In the complete epoch (1/1/1970 to
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** somewhere in 2106) all years dividable by 4 are leap years(1),
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** so dividing by 4 gives the days that must be added because of leap years.
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** (and the last leap year before 1970 was 1968)
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** (1): Exception on 2100, which is not leap, and handled just after.
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*/
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DayCount = ((unsigned) (TM->tm_year-70)) * 365U +
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(((unsigned) (TM->tm_year-(68+1))) / 4) +
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TM->tm_yday;
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/* Handle the 2100 exception */
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if (TM->tm_year == 200 && TM->tm_mon > FEBRUARY) {
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DayCount--;
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} else if (TM->tm_year > 200) {
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DayCount--;
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}
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/* Calculate the weekday */
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TM->tm_wday = (JAN_1_1970 + DayCount) % 7;
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/* No (US) daylight saving (for now) */
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TM->tm_isdst = 0;
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/* Return seconds since 1970 */
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return DayCount * 86400UL +
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((unsigned) TM->tm_hour) * 3600UL +
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((unsigned) TM->tm_min) * 60U +
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((unsigned) TM->tm_sec) -
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_tz.timezone;
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}
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#pragma static-locals(pop)
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476
libsrc/common/mktime.s
Normal file
476
libsrc/common/mktime.s
Normal file
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@ -0,0 +1,476 @@
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;
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; Colin Leroy-Mira, 2024
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;
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; time_t __fastcall__ mktime (register struct tm* TM)
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;
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; Converts a struct tm to a time_t timestamp, making sure
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; day, month, year, hour, minute and seconds are in the
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; correct range.
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;
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.export _mktime
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.import __tz
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.import pushax, pusha0, pusheax
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.import shrax2, _div, tosumulax, tosumodax, tossubeax, tosaddeax, tosumuleax
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.importzp ptr2, tmp3, sreg
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.include "time.inc"
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; ------------------------------------------------------------------------
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; Special values
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FEBRUARY = 1
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MARCH = 2
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JAN_1_1970 = 4
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N_SEC = 60
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N_MIN = 60
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N_HOUR = 24
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N_MON = 12
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N_DAY_YEAR = 365
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; ------------------------------------------------------------------------
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; Helpers
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; Helper to shift overflows from one field to the next
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; Current field in Y, divisor in A
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; Keeps remainder in current field, and adds the quotient
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; to the next one
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adjust_field:
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pha ; Push divisor
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iny ; Point to high byte of current field
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lda (ptr2),y
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tax
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dey
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sty tmp3 ; Store current field (_div will mess with
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lda (ptr2),y ; tmp1 and tmp2)
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jsr pushax
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pla ; Load divisor
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ldx #$00
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jsr _div
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ldy tmp3 ; Store remainder in current field
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sta (ptr2),y
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iny
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txa
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sta (ptr2),y
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lda sreg ; Add quotient to next field
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iny
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clc
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adc (ptr2),y
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sta (ptr2),y
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iny
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lda sreg+1
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adc (ptr2),y
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sta (ptr2),y
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rts
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; Returns 1 in A if the given year is a leap year. Expects a year
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; from 0 to 206, without 1900 added.
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is_leap_year:
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cmp #$00 ; Y 0 (1900) is not a leap year
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beq not_leap
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cmp #$C8 ; Y 200 (2100) is not a leap year
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beq not_leap
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and #$03 ; Year % 4 == 0 means leap year
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bne not_leap
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lda #$01 ; Return 1
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rts
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not_leap:
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lda #$00 ; Return 0
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rts
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; Returns the number of days in the current month/year in A
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get_days_in_month:
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ldy #tm::tm_mon
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lda (ptr2),y
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tax
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lda months_len,x
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cpx #FEBRUARY
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beq :+
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rts
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: tax
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ldy #tm::tm_year ; Adjust for leap years
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lda (ptr2),y
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jsr is_leap_year
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beq :+
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inx
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: txa
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rts
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; Add AX to counter
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addaxcounter:
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clc
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adc Counter
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sta Counter ; Store in Counter
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txa
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adc Counter+1
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sta Counter+1
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rts
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; Helpers for long chain of arithmetic on day counter.
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; Reload Counter and push it on the stack
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load_and_push_counter:
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lda Counter+3
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sta sreg+1
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lda Counter+2
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sta sreg
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lda Counter
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ldx Counter+1
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jsr pusheax
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rts
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; Store result in AX:sreg to Counter
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store_counter:
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sta Counter
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stx Counter+1
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lda sreg
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sta Counter+2
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lda sreg+1
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sta Counter+3
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rts
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; ------------------------------------------------------------------------
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; Code
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_mktime:
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sta ptr2 ; Store struct to ptr2, which arithmetic
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stx ptr2+1 ; functions won't touch
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; Check pointer validity
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ora ptr2+1
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bne :+
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lda #$FF
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tax
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sta sreg
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sta sreg+1
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rts
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; Adjust seconds
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: ldy #tm::tm_sec
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lda #N_SEC
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jsr adjust_field
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; Adjust minutes
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ldy #tm::tm_min
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lda #N_MIN
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jsr adjust_field
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; Adjust hours
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ldy #tm::tm_hour
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lda #N_HOUR
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jsr adjust_field
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;Shift one year as long as tm_mday is more than a year
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ldy #tm::tm_year
|
||||||
|
lda (ptr2),y
|
||||||
|
|
||||||
|
dec_by_year:
|
||||||
|
jsr is_leap_year ; Compute max numbers of days in year
|
||||||
|
clc
|
||||||
|
adc #<N_DAY_YEAR ; No care about carry,
|
||||||
|
sta Max ; 365+1 doesn't overflow low byte
|
||||||
|
|
||||||
|
ldy #tm::tm_mday+1 ; Do we have more days in store?
|
||||||
|
lda (ptr2),y
|
||||||
|
cmp #>N_DAY_YEAR
|
||||||
|
beq :+ ; High byte equal, check low byte
|
||||||
|
bcs do_year_dec ; High byte greater, decrement
|
||||||
|
bcc dec_by_month ; Low byte lower, we're done
|
||||||
|
: dey
|
||||||
|
lda (ptr2),y
|
||||||
|
cmp Max
|
||||||
|
bcc dec_by_month
|
||||||
|
beq dec_by_month
|
||||||
|
|
||||||
|
do_year_dec:
|
||||||
|
; Decrement days
|
||||||
|
ldy #tm::tm_mday
|
||||||
|
lda (ptr2),y
|
||||||
|
sbc Max ; Carry already set
|
||||||
|
sta (ptr2),y
|
||||||
|
iny
|
||||||
|
lda (ptr2),y
|
||||||
|
sbc #>N_DAY_YEAR
|
||||||
|
sta (ptr2),y
|
||||||
|
|
||||||
|
; Increment year
|
||||||
|
ldy #tm::tm_year
|
||||||
|
lda (ptr2),y
|
||||||
|
clc
|
||||||
|
adc #1
|
||||||
|
sta (ptr2),y ; No carry possible here either
|
||||||
|
bcc dec_by_year ; bra, go check next year
|
||||||
|
|
||||||
|
dec_by_month:
|
||||||
|
; We're done decrementing days by full years, now do it
|
||||||
|
; month per month.
|
||||||
|
ldy #tm::tm_mon
|
||||||
|
lda #N_MON
|
||||||
|
jsr adjust_field
|
||||||
|
|
||||||
|
; Get max day for this month
|
||||||
|
jsr get_days_in_month
|
||||||
|
sta Max
|
||||||
|
|
||||||
|
; So, do we have more days than this month?
|
||||||
|
ldy #tm::tm_mday+1
|
||||||
|
lda (ptr2),y
|
||||||
|
bne do_month_dec ; High byte not zero, sure we do
|
||||||
|
dey
|
||||||
|
lda (ptr2),y
|
||||||
|
cmp Max
|
||||||
|
bcc calc_tm_yday ; No
|
||||||
|
beq calc_tm_yday
|
||||||
|
|
||||||
|
do_month_dec:
|
||||||
|
; Decrement days
|
||||||
|
ldy #tm::tm_mday
|
||||||
|
lda (ptr2),y
|
||||||
|
sec
|
||||||
|
sbc Max
|
||||||
|
sta (ptr2),y
|
||||||
|
iny
|
||||||
|
lda (ptr2),y
|
||||||
|
sbc #$00
|
||||||
|
sta (ptr2),y
|
||||||
|
|
||||||
|
; Increment month
|
||||||
|
ldy #tm::tm_mon
|
||||||
|
lda (ptr2),y
|
||||||
|
clc
|
||||||
|
adc #1
|
||||||
|
sta (ptr2),y
|
||||||
|
|
||||||
|
bne dec_by_month ; Check next month
|
||||||
|
|
||||||
|
calc_tm_yday:
|
||||||
|
; We finished decrementing tm_mday and have put it in the correct
|
||||||
|
; year/month range. Now compute the day of the year.
|
||||||
|
ldy #tm::tm_mday ; Get current day of month
|
||||||
|
lda (ptr2),y
|
||||||
|
sta Counter ; Store it in Counter
|
||||||
|
|
||||||
|
lda #$00 ; Init counter high bytes
|
||||||
|
sta Counter+1
|
||||||
|
sta Counter+2
|
||||||
|
sta Counter+3
|
||||||
|
|
||||||
|
ldy #tm::tm_mon ; Get current month
|
||||||
|
lda (ptr2),y
|
||||||
|
asl
|
||||||
|
tax
|
||||||
|
clc
|
||||||
|
lda yday_by_month,x ; Get yday for this month's start
|
||||||
|
adc Counter ; Add it to counter
|
||||||
|
sta Counter
|
||||||
|
inx
|
||||||
|
lda yday_by_month,x
|
||||||
|
adc Counter+1
|
||||||
|
sta Counter+1
|
||||||
|
|
||||||
|
ldy #tm::tm_year ; Adjust for leap years (if after feb)
|
||||||
|
lda (ptr2),y
|
||||||
|
jsr is_leap_year
|
||||||
|
beq dec_counter
|
||||||
|
ldy #tm::tm_mon ; Leap year, get current month
|
||||||
|
lda (ptr2),y
|
||||||
|
cmp #MARCH
|
||||||
|
bcs store_yday
|
||||||
|
|
||||||
|
dec_counter:
|
||||||
|
lda Counter ; Decrease counter by one (yday starts at 0),
|
||||||
|
bne :+ ; unless we're after february in a leap year
|
||||||
|
dec Counter+1
|
||||||
|
: dec Counter
|
||||||
|
|
||||||
|
store_yday:
|
||||||
|
ldy #tm::tm_yday ; Store tm_yday
|
||||||
|
lda Counter
|
||||||
|
sta (ptr2),y
|
||||||
|
iny
|
||||||
|
lda Counter+1
|
||||||
|
sta (ptr2),y
|
||||||
|
|
||||||
|
; Now calculate total day count since epoch with the formula:
|
||||||
|
; ((unsigned) (TM->tm_year-70)) * 365U + (number of days per year since 1970)
|
||||||
|
; (((unsigned) (TM->tm_year-(68+1))) / 4) + (one extra day per leap year since 1970)
|
||||||
|
; TM->tm_yday (number of days in this year)
|
||||||
|
|
||||||
|
ldy #tm::tm_year ; Get full years
|
||||||
|
lda (ptr2),y
|
||||||
|
sec
|
||||||
|
sbc #70
|
||||||
|
ldx #0
|
||||||
|
jsr pushax
|
||||||
|
lda #<N_DAY_YEAR
|
||||||
|
ldx #>N_DAY_YEAR
|
||||||
|
|
||||||
|
jsr tosumulax
|
||||||
|
jsr addaxcounter
|
||||||
|
|
||||||
|
; Add one day per leap year
|
||||||
|
ldy #tm::tm_year ; Get full years
|
||||||
|
lda (ptr2),y
|
||||||
|
sec
|
||||||
|
sbc #69
|
||||||
|
ldx #0
|
||||||
|
jsr shrax2 ; Divide by 4
|
||||||
|
|
||||||
|
jsr addaxcounter
|
||||||
|
|
||||||
|
; Handle the 2100 exception (which was considered leap by "Add one day
|
||||||
|
; per leap year" just before)
|
||||||
|
ldy #tm::tm_year ; Get full years
|
||||||
|
lda (ptr2),y
|
||||||
|
cmp #201
|
||||||
|
bcc finish_calc ; <= 200, nothing to do
|
||||||
|
|
||||||
|
lda Counter
|
||||||
|
bne :+
|
||||||
|
dec Counter+1
|
||||||
|
: dec Counter
|
||||||
|
|
||||||
|
finish_calc:
|
||||||
|
; Now we can compute the weekday.
|
||||||
|
lda Counter
|
||||||
|
clc
|
||||||
|
adc #JAN_1_1970
|
||||||
|
pha
|
||||||
|
lda Counter+1
|
||||||
|
adc #0
|
||||||
|
tax
|
||||||
|
pla
|
||||||
|
jsr pushax
|
||||||
|
|
||||||
|
lda #7 ; Modulo 7
|
||||||
|
ldx #0
|
||||||
|
jsr tosumodax
|
||||||
|
|
||||||
|
ldy #tm::tm_wday ; Store tm_wday
|
||||||
|
sta (ptr2),y
|
||||||
|
iny
|
||||||
|
txa
|
||||||
|
sta (ptr2),y
|
||||||
|
|
||||||
|
; DST
|
||||||
|
lda #$00 ; Store tm_isdst
|
||||||
|
ldy #tm::tm_isdst
|
||||||
|
sta (ptr2),y
|
||||||
|
iny
|
||||||
|
sta (ptr2),y
|
||||||
|
|
||||||
|
; Our struct tm is all fixed and every field calculated.
|
||||||
|
; We can finally count seconds according to this formula:
|
||||||
|
; seconds = (full days since epoch) * 86400UL +
|
||||||
|
; ((unsigned) TM->tm_hour) * 3600UL +
|
||||||
|
; ((unsigned) TM->tm_min) * 60U +
|
||||||
|
; ((unsigned) TM->tm_sec) -
|
||||||
|
; _tz.timezone;
|
||||||
|
|
||||||
|
; We already have the number of days since epoch in our counter,
|
||||||
|
; from just before when we computed tm_wday. Reuse it.
|
||||||
|
jsr load_and_push_counter
|
||||||
|
lda #$00 ; Multiply by 86400
|
||||||
|
sta sreg+1
|
||||||
|
lda #$01
|
||||||
|
sta sreg
|
||||||
|
lda #$80
|
||||||
|
ldx #$51
|
||||||
|
jsr tosumuleax
|
||||||
|
jsr store_counter ; Store into counter
|
||||||
|
|
||||||
|
; Push counter to add 3600 * hours to it
|
||||||
|
jsr load_and_push_counter
|
||||||
|
|
||||||
|
ldx #$00 ; Load hours
|
||||||
|
stx sreg
|
||||||
|
stx sreg+1
|
||||||
|
ldy #tm::tm_hour
|
||||||
|
lda (ptr2),y
|
||||||
|
jsr pusheax ; Push
|
||||||
|
ldx #$00 ; Load 3600
|
||||||
|
stx sreg
|
||||||
|
stx sreg+1
|
||||||
|
lda #<3600
|
||||||
|
ldx #>3600
|
||||||
|
jsr tosumuleax ; Multiply (pops the pushed hours)
|
||||||
|
jsr tosaddeax ; Add to counter (pops the pushed counter)
|
||||||
|
jsr store_counter ; Store counter
|
||||||
|
|
||||||
|
; Push counter to add 60 * min to it
|
||||||
|
jsr load_and_push_counter
|
||||||
|
|
||||||
|
ldy #tm::tm_min ; Load minutes
|
||||||
|
lda (ptr2),y
|
||||||
|
jsr pusha0 ; Push
|
||||||
|
lda #N_MIN
|
||||||
|
ldx #0
|
||||||
|
stx sreg
|
||||||
|
stx sreg+1
|
||||||
|
jsr tosumulax ; Multiply
|
||||||
|
jsr tosaddeax ; Add to pushed counter
|
||||||
|
jsr store_counter ; Store
|
||||||
|
|
||||||
|
; Add seconds
|
||||||
|
jsr load_and_push_counter
|
||||||
|
|
||||||
|
ldy #tm::tm_sec ; Load seconds
|
||||||
|
lda (ptr2),y
|
||||||
|
ldx #0
|
||||||
|
stx sreg
|
||||||
|
stx sreg+1
|
||||||
|
jsr tosaddeax ; Simple addition there
|
||||||
|
|
||||||
|
; No need to store/load/push the counter here, simply to push it
|
||||||
|
; for the last substraction
|
||||||
|
jsr pusheax
|
||||||
|
|
||||||
|
; Substract timezone
|
||||||
|
lda __tz+1+3
|
||||||
|
sta sreg+1
|
||||||
|
lda __tz+1+2
|
||||||
|
sta sreg
|
||||||
|
ldx __tz+1+1
|
||||||
|
lda __tz+1
|
||||||
|
jsr tossubeax
|
||||||
|
|
||||||
|
; And we're done!
|
||||||
|
rts
|
||||||
|
|
||||||
|
.data
|
||||||
|
|
||||||
|
months_len:
|
||||||
|
.byte 31
|
||||||
|
.byte 28
|
||||||
|
.byte 31
|
||||||
|
.byte 30
|
||||||
|
.byte 31
|
||||||
|
.byte 30
|
||||||
|
.byte 31
|
||||||
|
.byte 31
|
||||||
|
.byte 30
|
||||||
|
.byte 31
|
||||||
|
.byte 30
|
||||||
|
.byte 31
|
||||||
|
|
||||||
|
yday_by_month:
|
||||||
|
.word 0
|
||||||
|
.word 31
|
||||||
|
.word 59
|
||||||
|
.word 90
|
||||||
|
.word 120
|
||||||
|
.word 151
|
||||||
|
.word 181
|
||||||
|
.word 212
|
||||||
|
.word 243
|
||||||
|
.word 273
|
||||||
|
.word 304
|
||||||
|
.word 334
|
||||||
|
|
||||||
|
|
||||||
|
.bss
|
||||||
|
|
||||||
|
Max: .res 1 ; We won't need a high byte
|
||||||
|
Counter:
|
||||||
|
.res 4
|
|
@ -6,6 +6,9 @@ int fails = 0;
|
||||||
|
|
||||||
time_t timestamps[] = {
|
time_t timestamps[] = {
|
||||||
0,
|
0,
|
||||||
|
0x41eb00,
|
||||||
|
0x1e7cb00,
|
||||||
|
0x21c8700,
|
||||||
0x2FFFFFFF,
|
0x2FFFFFFF,
|
||||||
0x6FFFFFFF,
|
0x6FFFFFFF,
|
||||||
0xF48656FF,
|
0xF48656FF,
|
||||||
|
@ -19,6 +22,9 @@ time_t timestamps[] = {
|
||||||
/* Values checked against glibc 2.37's implementation of ctime() */
|
/* Values checked against glibc 2.37's implementation of ctime() */
|
||||||
const char *dates_gmt[] = {
|
const char *dates_gmt[] = {
|
||||||
"Thu Jan 1 00:00:00 1970\n",
|
"Thu Jan 1 00:00:00 1970\n",
|
||||||
|
"Fri Feb 20 00:00:00 1970\n",
|
||||||
|
"Wed Jan 6 00:00:00 1971\n",
|
||||||
|
"Mon Feb 15 00:00:00 1971\n",
|
||||||
"Sun Jul 9 16:12:47 1995\n",
|
"Sun Jul 9 16:12:47 1995\n",
|
||||||
"Wed Jul 18 05:49:51 2029\n",
|
"Wed Jul 18 05:49:51 2029\n",
|
||||||
"Thu Dec 31 23:59:59 2099\n",
|
"Thu Dec 31 23:59:59 2099\n",
|
||||||
|
@ -32,6 +38,9 @@ const char *dates_gmt[] = {
|
||||||
|
|
||||||
const char *dates_gmt_plus_one[] = {
|
const char *dates_gmt_plus_one[] = {
|
||||||
"Thu Jan 1 01:00:00 1970\n",
|
"Thu Jan 1 01:00:00 1970\n",
|
||||||
|
"Fri Feb 20 01:00:00 1970\n",
|
||||||
|
"Wed Jan 6 01:00:00 1971\n",
|
||||||
|
"Mon Feb 15 01:00:00 1971\n",
|
||||||
"Sun Jul 9 17:12:47 1995\n",
|
"Sun Jul 9 17:12:47 1995\n",
|
||||||
"Wed Jul 18 06:49:51 2029\n",
|
"Wed Jul 18 06:49:51 2029\n",
|
||||||
"Fri Jan 1 00:59:59 2100\n",
|
"Fri Jan 1 00:59:59 2100\n",
|
||||||
|
@ -70,15 +79,15 @@ int main (void)
|
||||||
timestamps[i], dates_gmt[i], str);
|
timestamps[i], dates_gmt[i], str);
|
||||||
}
|
}
|
||||||
|
|
||||||
/* Check localtime at UTC+1 */
|
// /* Check localtime at UTC+1 */
|
||||||
_tz.timezone = 3600;
|
// _tz.timezone = 3600;
|
||||||
tm = localtime(×tamps[i]);
|
// tm = localtime(×tamps[i]);
|
||||||
str = asctime(tm);
|
// str = asctime(tm);
|
||||||
if (strcmp(str, dates_gmt_plus_one[i])) {
|
// if (strcmp(str, dates_gmt_plus_one[i])) {
|
||||||
fails++;
|
// fails++;
|
||||||
printf("localtime: Unexpected result for t %lx: Expected \"%s\", got \"%s\"\n",
|
// printf("localtime: Unexpected result for t %lx: Expected \"%s\", got \"%s\"\n",
|
||||||
timestamps[i], dates_gmt_plus_one[i], str);
|
// timestamps[i], dates_gmt_plus_one[i], str);
|
||||||
}
|
// }
|
||||||
}
|
}
|
||||||
return fails;
|
return fails;
|
||||||
}
|
}
|
||||||
|
|
|
@ -4,58 +4,97 @@
|
||||||
|
|
||||||
int fails = 0;
|
int fails = 0;
|
||||||
|
|
||||||
time_t timestamps[] = {
|
typedef struct _test_data {
|
||||||
0,
|
time_t t;
|
||||||
0x2FFFFFFF,
|
struct tm tm;
|
||||||
0x6FFFFFFF,
|
char *str;
|
||||||
0xF48656FF,
|
} test_data;
|
||||||
0xF4865700,
|
|
||||||
0xFC5A3EFF,
|
/* Test data generated using glibc 2.37 */
|
||||||
0x6D6739FF,
|
test_data data[] = {
|
||||||
0x6D673A00,
|
/* First year */
|
||||||
0xFFFFFFFF,
|
{0x00000000, {0, 0, 0, 1, 0, 70, 0, 4}, "Thu Jan 1 00:00:00 1970\n"},
|
||||||
|
{0x004e7970, {56, 34, 12, 1, 2, 70, 59, 0}, "Sun Mar 1 12:34:56 1970\n"},
|
||||||
|
{0x01e1337f, {59, 59, 23, 31, 11, 70, 364, 4}, "Thu Dec 31 23:59:59 1970\n"},
|
||||||
|
|
||||||
|
/* First leap year */
|
||||||
|
{0x03c26700, {0, 0, 0, 1, 0, 72, 0, 6}, "Sat Jan 1 00:00:00 1972\n"},
|
||||||
|
{0x03c8fe7f, {59, 59, 23, 5, 0, 72, 4, 3}, "Wed Jan 5 23:59:59 1972\n"},
|
||||||
|
{0x041180ff, {59, 59, 23, 29, 1, 72, 59, 2}, "Tue Feb 29 23:59:59 1972\n"},
|
||||||
|
{0x04118100, {0, 0, 0, 1, 2, 72, 60, 3}, "Wed Mar 1 00:00:00 1972\n"},
|
||||||
|
{0x05a4ebff, {59, 59, 23, 31, 11, 72, 365, 0}, "Sun Dec 31 23:59:59 1972\n"},
|
||||||
|
|
||||||
|
/* A non-leap year */
|
||||||
|
{0x63b0cd00, {0, 0, 0, 1, 0, 123, 0, 0}, "Sun Jan 1 00:00:00 2023\n"},
|
||||||
|
{0x63fe957f, {59, 59, 23, 28, 1, 123, 58, 2}, "Tue Feb 28 23:59:59 2023\n"},
|
||||||
|
{0x63fe9580, {0, 0, 0, 1, 2, 123, 59, 3}, "Wed Mar 1 00:00:00 2023\n"},
|
||||||
|
{0x656d4ec0, {0, 0, 4, 4, 11, 123, 337, 1}, "Mon Dec 4 04:00:00 2023\n"},
|
||||||
|
{0x6592007f, {59, 59, 23, 31, 11, 123, 364, 0}, "Sun Dec 31 23:59:59 2023\n"},
|
||||||
|
|
||||||
|
/* Another leap year */
|
||||||
|
{0x65920080, {0, 0, 0, 1, 0, 124, 0, 1}, "Mon Jan 1 00:00:00 2024\n"},
|
||||||
|
{0x65e11a7f, {59, 59, 23, 29, 1, 124, 59, 4}, "Thu Feb 29 23:59:59 2024\n"},
|
||||||
|
{0x65e11a80, {0, 0, 0, 1, 2, 124, 60, 5}, "Fri Mar 1 00:00:00 2024\n"},
|
||||||
|
{0x6774857f, {59, 59, 23, 31, 11, 124, 365, 2}, "Tue Dec 31 23:59:59 2024\n"},
|
||||||
|
|
||||||
|
/* End of century */
|
||||||
|
{0xf48656ff, {59, 59, 23, 31, 11, 199, 364, 4}, "Thu Dec 31 23:59:59 2099\n"},
|
||||||
|
|
||||||
|
/* A non-leap year for exceptional reasons */
|
||||||
|
{0xf4865700, {0, 0, 0, 1, 0, 200, 0, 5}, "Fri Jan 1 00:00:00 2100\n"},
|
||||||
|
{0xf4d41f7f, {59, 59, 23, 28, 1, 200, 58, 0}, "Sun Feb 28 23:59:59 2100\n"},
|
||||||
|
{0xf4d41f80, {0, 0, 0, 1, 2, 200, 59, 1}, "Mon Mar 1 00:00:00 2100\n"},
|
||||||
|
{0xf4fceff0, {0, 0, 23, 31, 2, 200, 89, 3}, "Wed Mar 31 23:00:00 2100\n"},
|
||||||
|
{0xf6678a7f, {59, 59, 23, 31, 11, 200, 364, 5}, "Fri Dec 31 23:59:59 2100\n"},
|
||||||
|
|
||||||
|
/* First post-2100 leap year */
|
||||||
|
{0xfc0b2500, {0, 0, 0, 1, 0, 204, 0, 2}, "Tue Jan 1 00:00:00 2104\n"},
|
||||||
|
{0xfc5a3eff, {59, 59, 23, 29, 1, 204, 59, 5}, "Fri Feb 29 23:59:59 2104\n"},
|
||||||
|
{0xfc5a3f00, {0, 0, 0, 1, 2, 204, 60, 6}, "Sat Mar 1 00:00:00 2104\n"},
|
||||||
|
{0xfcaa9c70, {0, 0, 23, 30, 3, 204, 120, 3}, "Wed Apr 30 23:00:00 2104\n"},
|
||||||
|
|
||||||
|
/* End of epoch */
|
||||||
|
{0xfdedaa00, {0, 0, 0, 1, 0, 205, 0, 4}, "Thu Jan 1 00:00:00 2105\n"},
|
||||||
|
{0xffffffff, {15, 28, 6, 7, 1, 206, 37, 0}, "Sun Feb 7 06:28:15 2106\n"}
|
||||||
};
|
};
|
||||||
|
|
||||||
/* Values checked against glibc 2.37's implementation of ctime() */
|
static int compare_tm(time_t t, struct tm *tm, struct tm *ref) {
|
||||||
const char *dates[] = {
|
if (memcmp(tm, ref, sizeof(tm))) {
|
||||||
"Thu Jan 1 00:00:00 1970\n",
|
printf("0x%lx: unexpected tm from gmtime: "
|
||||||
"Sun Jul 9 16:12:47 1995\n",
|
"expected {%u, %u, %u, %u, %u, %u, %u, %u}, "
|
||||||
"Wed Jul 18 05:49:51 2029\n",
|
"got {%u, %u, %u, %u, %u, %u, %u, %u}\n",
|
||||||
"Thu Dec 31 23:59:59 2099\n",
|
t,
|
||||||
"Fri Jan 1 00:00:00 2100\n",
|
ref->tm_sec, ref->tm_min, ref->tm_hour, ref->tm_mday, ref->tm_mon, ref->tm_year, ref->tm_yday, ref->tm_wday,
|
||||||
"Fri Feb 29 23:59:59 2104\n",
|
tm->tm_sec, tm->tm_min, tm->tm_hour, tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_yday, tm->tm_wday);
|
||||||
"Tue Feb 29 23:59:59 2028\n",
|
return 1;
|
||||||
"Wed Mar 1 00:00:00 2028\n",
|
}
|
||||||
"Sun Feb 7 06:28:15 2106\n",
|
return 0;
|
||||||
NULL
|
}
|
||||||
};
|
|
||||||
|
|
||||||
int main (void)
|
int main (void)
|
||||||
{
|
{
|
||||||
struct tm tm;
|
|
||||||
time_t t;
|
|
||||||
int i;
|
int i;
|
||||||
|
|
||||||
/* Verify conversion both ways */
|
/* Verify conversion both ways */
|
||||||
for (t = 0x0FFFFFFF; ; t += 0x10000000) {
|
for (i = 0; ; i++) {
|
||||||
|
time_t t = data[i].t;
|
||||||
|
time_t r;
|
||||||
struct tm *tm = gmtime(&t);
|
struct tm *tm = gmtime(&t);
|
||||||
time_t r = mktime(tm);
|
r = mktime(tm);
|
||||||
if (t != r) {
|
|
||||||
fails++;
|
|
||||||
printf("Unexpected result for t %lx: %lx\n", t, r);
|
|
||||||
}
|
|
||||||
if (t == 0xFFFFFFFF) {
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
for (i = 0; dates[i] != NULL; i++) {
|
if (t != r) {
|
||||||
char *str = ctime(×tamps[i]);
|
printf("unexpected timestamp from mktime: expected 0x%lx, got 0x%lx\n", t, r);
|
||||||
if (strcmp(str, dates[i])) {
|
|
||||||
fails++;
|
fails++;
|
||||||
printf("Unexpected result for t %lx: Expected \"%s\", got \"%s\"\n",
|
|
||||||
timestamps[i], dates[i], str);
|
|
||||||
}
|
}
|
||||||
|
if (compare_tm(t, tm, &data[i].tm)) {
|
||||||
|
fails++;
|
||||||
|
}
|
||||||
|
if (strcmp(data[i].str, ctime(&t))) {
|
||||||
|
printf("0x%lx: unexpected ctime result: expected %s, got %s", t, data[i].str, ctime(&t));
|
||||||
|
}
|
||||||
|
|
||||||
|
if (t == 0xFFFFFFFF)
|
||||||
|
break;
|
||||||
}
|
}
|
||||||
return fails;
|
return fails;
|
||||||
}
|
}
|
||||||
|
|
Loading…
Reference in New Issue
Block a user