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https://github.com/A2osX/A2osX.git
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381 lines
6.9 KiB
Plaintext
381 lines
6.9 KiB
Plaintext
PR#3
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PREFIX /A2OSX.BUILD
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LOMEM $A00
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INC 1
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AUTO 6
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*--------------------------------------
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* https://www.cise.ufl.edu/~cop4600/cgi-bin/lxr/http/source.cgi/lib/ansi/gmtime.c
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*--------------------------------------
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SECSDAY .EQ 86400 60*60*24
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CENTURY0 .EQ 19
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YEAR0 .EQ 70
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DAY0 .EQ 4 day 0 was a thursday
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*--------------------------------------
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* K.TimeYA get System Time
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* In :
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* Y,A = PTR to S.TIME
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* Out :
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* S.TIME filled with System date/time
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*--------------------------------------
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K.TimeYA >STYA ZPPtr2
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>MLICALL MLIGETTIME
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>LDYAI DATELO
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>STYA ZPPtr1
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bra K.PTime2Time.1
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*--------------------------------------
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* In :
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* PULLW = Src PDATE/TIME (DWORD)
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* PULLW = Dst PTR To S.TIME
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*--------------------------------------
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K.PTime2Time jsr PullPtr1Ptr2
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K.PTime2Time.1 ldy #1
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lda (ZPPtr1),y Get Year
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lsr C is high bit of month
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ldy #S.Time.YEAR
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sta (ZPPtr2),y set year
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sta K.CTime.Year for conputing Century/WDAY later
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lda (ZPPtr1) Get Month/day
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pha save Day
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ror
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lsr
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lsr
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lsr
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lsr
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ldy #S.Time.MONTH
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sta (ZPPtr2),y set month
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pla get back day
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and #$1F
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iny
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sta (ZPPtr2),y set day
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lda K.CTime.Year get back year
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cmp #69 if before 70 CC,if > 70, CS
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lda #0
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rol get back C in bit 0
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eor #1 toggle C
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adc #19 set date before 1970 -> 20xx
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sta (ZPPtr2) set Century
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sta K.CTime.Century for conputing WDAY later
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ldy #2
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lda (ZPPtr1),y Get Min
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tax
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iny
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lda (ZPPtr1),y Get Hour
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ldy #S.Time.HOUR
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sta (ZPPtr2),y set hour
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iny
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txa
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sta (ZPPtr2),y set min
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iny
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lda #0
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sta (ZPPtr2),y set seconds (ProDOS does not provide it)
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* 1/1/1970 was Thursday...if not leap, add one, if leap add 2
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K.ComputeWDAY lda #3 Thursday : 4 (-1 for mod 7)
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pha
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lda #19
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sta K.CTime.DWORD
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lda #70
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sta K.CTime.DWORD+1
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.1 ldy K.CTime.DWORD
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lda K.CTime.DWORD+1
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cpy K.CTime.Century
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bne .2
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cmp K.CTime.Year
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beq .4
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.2 jsr TIME.IsLeapYearYA CC = Leap
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lda #0
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rol
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eor #1
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lsr
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pla
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adc #1
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cmp #7
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bcc .3
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sbc #7 MOD 7
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.3 pha
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inc K.CTime.DWORD+1
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lda K.CTime.DWORD+1
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cmp #100
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bne .1
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lda #0
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sta K.CTime.DWORD+1
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inc K.CTime.DWORD
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bra .1
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.4 ldy #S.Time.MONTH
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lda (ZPPtr2),y get month
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tax
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.5 lda K.StrFTime.MDAY-1,x get day count in this month
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bne .6 february ?
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ldy K.CTime.Century
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lda K.CTime.Year
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jsr TIME.IsLeapYearYA CC = Leap
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lda #0
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rol
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eor #1
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lsr
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.6 pla
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adc K.StrFTime.MDAY-1,x
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cmp #7
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bcc .7
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sbc #7
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.7 pha
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dex
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bne .5
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pla
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ldy #S.Time.DAY
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adc (ZPPtr2),y get month (1..31)
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dec adjust range 0.31 for MOD 7
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.8 cmp #7 MOD 7
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bcc .80
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sbc #7
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bra .8
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.80 inc adjust range 1..7
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ldy #S.Time.WDAY
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sta (ZPPtr2),y
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clc
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rts
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*--------------------------------------
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* K.CTime2Time
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* In :
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* PULLW = Src CTIME DWORD
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* PULLW = Dst PTR To S.TIME
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*--------------------------------------
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K.CTime2Time jsr PullPtr1Ptr2
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ldy #3
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.1 lda (ZPPtr1),y
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sta K.CTime.DWORD,y
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dey
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bpl .1
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stz K.CTime.DivDay
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stz K.CTime.DivDay+1
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.2 lda K.CTime.DWORD
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sta K.CTime.ModDay
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sec
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sbc #SECSDAY
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pha
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lda K.CTime.DWORD+1
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sta K.CTime.ModDay+1
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sbc /SECSDAY
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pha
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lda K.CTime.DWORD+2
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sta K.CTime.ModDay+2
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sbc #0
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pha
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lda K.CTime.DWORD+3
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sbc #0
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bcc .3 end of DIV/MOD ?
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sta K.CTime.DWORD+3
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ldx #2
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.21 pla
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sta K.CTime.DWORD,x
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dex
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bpl .21
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inc K.CTime.DivDay
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bne .2
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inc K.CTime.DivDay+1
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bne .2
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.3 pla
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pla
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pla
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stz K.CTime.Div60
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stz K.CTime.Div60+1
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.4 lda K.CTime.ModDay
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sta K.CTime.Mod
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sec
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sbc #60
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pha
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lda K.CTime.ModDay+1
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sbc #0
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pha
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lda K.CTime.ModDay+2
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sbc #0
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bcc .5
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sta K.CTime.ModDay+2
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pla
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sta K.CTime.ModDay+1
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pla
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sta K.CTime.ModDay
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inc K.CTime.Div60
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bne .4
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inc K.CTime.Div60+1
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bne .4
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.5 pla
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pla
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lda K.CTime.Mod
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ldy #S.Time.SECOND
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sta (ZPPtr2),y
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stz K.CTime.Div3600
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.6 lda K.CTime.Div60
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sta K.CTime.Mod
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sec
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sbc #60
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pha
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lda K.CTime.Div60+1
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sbc #0
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pha
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bcc .7
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sta K.CTime.Div60+1
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pla
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sta K.CTime.Div60
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inc K.CTime.Div3600
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bne .6
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.7 pla
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lda K.CTime.Mod
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dey ldy #S.Time.MINUTE
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sta (ZPPtr2),y
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lda K.CTime.Div3600
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dey ldy #S.Time.HOUR
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sta (ZPPtr2),y
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lda K.CTime.DivDay WDAY computation : (DivDay + DAY0) mod 7
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clc
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adc #DAY0
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pha
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lda K.CTime.DivDay+1
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adc /DAY0
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eor #$ff
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tax
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pla
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.8 sta K.CTime.Mod
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sec
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sbc #7
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bcs .8
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inx
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bne .8
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lda K.CTime.Mod
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ldy #S.Time.WDAY
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sta (ZPPtr2),y
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lda #CENTURY0
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sta K.CTime.Century
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lda #YEAR0
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sta K.CTime.Year
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K.CTime2Time.Year
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.1 ldy K.CTime.Century
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lda K.CTime.Year
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jsr TIME.IsLeapYearYA if Leap year CC
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lda K.CTime.DivDay
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sbc #365
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pha
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lda K.CTime.DivDay+1
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sbc /365
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bcc .2
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sta K.CTime.DivDay+1
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pla
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sta K.CTime.DivDay
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inc K.CTime.Year
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lda K.CTime.Year
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cmp #100
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bne .1
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stz K.CTime.Year
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inc K.CTime.Century
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bne .1
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.2 pla
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lda K.CTime.Century
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* ldy #S.Time.CENTURY
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sta (ZPPtr2)
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ldy #S.Time.YEAR
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lda K.CTime.Year
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sta (ZPPtr2),y
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clc
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rts
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*--------------------------------------
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* In :
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* Y = Century
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* A = Year (0..99)
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* if (year mod 400 = 0)
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* or
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* if not (year mod 100 = 0) and (year mod 4 = 0)
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* Out :
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* CC = Leap
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* CS = Not Leap
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*--------------------------------------
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TIME.IsLeapYearYA
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cmp #0 Year = 00 ?
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bne .1 no
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tya year = 00, get century in a
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and #$3 mod 4 = 0 ?
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beq .9 leap year
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.8 sec not leap
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rts
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.1 and #$3 mod 4 = 0 ?
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bne .8
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.9 clc Leap
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rts
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*--------------------------------------
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K.StrFTime.MDAY .DA #3,#0,#3,#2,#3,#2,#3,#3,#2,#3,#2,#3
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K.CTime.DWORD .BS 4
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K.CTime.DivDay .BS 2
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K.CTime.ModDay .BS 3
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K.CTime.Div60 .BS 2
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K.CTime.Div3600 .BS 1
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K.CTime.Mod .BS 1
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K.CTime.Century .BS 1
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K.CTime.Year .BS 1
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MAN
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SAVE /A2OSX.SRC/SYS/KERNEL.S.Time
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LOAD /A2OSX.SRC/SYS/KERNEL.S
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ASM
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