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A2osX/SYS/KERNEL.S.TIME.txt
Rémy GIBERT 026a9cc3dc Kernel 0.9.2
2018-10-11 17:23:06 +02:00

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NEW
PREFIX /A2OSX.BUILD
AUTO 4,1
*--------------------------------------
* https://www.cise.ufl.edu/~cop4600/cgi-bin/lxr/http/source.cgi/lib/ansi/gmtime.c
*--------------------------------------
SECSDAY .EQ 86400 60*60*24
CENTURY0 .EQ 19
YEAR0 .EQ 70
DAY0 .EQ 4 day 0 was a thursday
*/--------------------------------------
* # Time
* Get System Time in Buffer
* ## C
* `time_t time (S.TIME* timer);`
* ## ASM
* `>LDYA timer`
* `>SYSCALL time`
* ## RETURN VALUE
* S.TIME filled with System date/time
*\--------------------------------------
K.Time >STYA ZPPtr2
>MLICALL MLIGETTIME
>LDYAI DATELO
>STYA ZPPtr1
bra TIME.PTime2TimeP1P2
*/--------------------------------------
* # PTime2Time
* Convert ProDOS Time To S.TIME
* ## C
* `int PTime2Time (long* ptime, S.TIME* timer);`
* ## ASM
* `>PUSHW timer`
* `>LDYA ptime`
* `>SYSCALL PTime2Time`
* ## RETURN VALUE
*\--------------------------------------
K.PTime2Time jsr MEM.SPtr1PPtr2
TIME.PTime2TimeP1P2
ldy #1
lda (ZPPtr1),y Get Year
lsr C is high bit of month
ldy #S.Time.YEAR
sta (ZPPtr2),y set year
sta K.CTime.Year for conputing Century/WDAY later
lda (ZPPtr1) Get Month/day
pha save Day
ror
lsr
lsr
lsr
lsr
ldy #S.Time.MONTH
sta (ZPPtr2),y set month
pla get back day
and #$1F
iny
sta (ZPPtr2),y set day
lda K.CTime.Year get back year
cmp #69 if before 70 CC,if > 70, CS
lda #0
rol get back C in bit 0
eor #1 toggle C
adc #19 set date before 1970 -> 20xx
sta (ZPPtr2) set Century
sta K.CTime.Century for conputing WDAY later
ldy #2
lda (ZPPtr1),y Get Min
tax
iny
lda (ZPPtr1),y Get Hour
ldy #S.Time.HOUR
sta (ZPPtr2),y set hour
iny
txa
sta (ZPPtr2),y set min
iny
lda #0
sta (ZPPtr2),y set seconds (ProDOS does not provide it)
* 1/1/1970 was Thursday...if not leap, add one, if leap add 2
K.ComputeWDAY lda #3 Thursday : 4 (-1 for mod 7)
pha
lda #19
sta K.CTime.DWORD
lda #70
sta K.CTime.DWORD+1
.1 ldy K.CTime.DWORD
lda K.CTime.DWORD+1
cpy K.CTime.Century
bne .2
cmp K.CTime.Year
beq .4
.2 jsr TIME.IsLeapYearYA CS = Leap
pla
adc #1
cmp #7
bcc .3
sbc #7 MOD 7
.3 pha
inc K.CTime.DWORD+1
lda K.CTime.DWORD+1
cmp #100
bne .1
lda #0
sta K.CTime.DWORD+1
inc K.CTime.DWORD
bra .1
.4 ldy #S.Time.MONTH
lda (ZPPtr2),y get month
tax
.5 lda K.StrFTime.MDAY-1,x get day count in this month
bne .6 february ?
ldy K.CTime.Century
lda K.CTime.Year
jsr TIME.IsLeapYearYA CS = Leap
.6 pla
adc K.StrFTime.MDAY-1,x
cmp #7
bcc .7
sbc #7
.7 pha
dex
bne .5
pla
ldy #S.Time.DAY
adc (ZPPtr2),y get day in month (1..31)
dec adjust range 0.30 for MOD 7
.8 cmp #7 MOD 7
bcc .80
sbc #7
bra .8
.80 inc adjust range 1..7
ldy #S.Time.WDAY
sta (ZPPtr2),y
clc
rts
*/--------------------------------------
* # CTime2Time
* Convert CTime Time To S.TIME
* ## C
* `int CTime2Time (long* ctime, S.TIME* timer);`
* ## ASM
* `>PUSHW timer`
* `>LDYA ctime`
* `>SYSCALL CTime2Time`
* ## RETURN VALUE
*\--------------------------------------
K.CTime2Time jsr MEM.SPtr1PPtr2
ldy #3
.1 lda (ZPPtr1),y
sta K.CTime.DWORD,y
dey
bpl .1
stz K.CTime.DivDay
stz K.CTime.DivDay+1
.2 lda K.CTime.DWORD
sta K.CTime.ModDay
sec
sbc #SECSDAY
pha
lda K.CTime.DWORD+1
sta K.CTime.ModDay+1
sbc /SECSDAY
pha
lda K.CTime.DWORD+2
sta K.CTime.ModDay+2
sbc #0
pha
lda K.CTime.DWORD+3
sbc #0
bcc .3 end of DIV/MOD ?
sta K.CTime.DWORD+3
ldx #2
.21 pla
sta K.CTime.DWORD,x
dex
bpl .21
inc K.CTime.DivDay
bne .2
inc K.CTime.DivDay+1
bne .2
.3 pla
pla
pla
stz K.CTime.Div60
stz K.CTime.Div60+1
.4 lda K.CTime.ModDay
sta K.CTime.Mod
sec
sbc #60
pha
lda K.CTime.ModDay+1
sbc #0
pha
lda K.CTime.ModDay+2
sbc #0
bcc .5
sta K.CTime.ModDay+2
pla
sta K.CTime.ModDay+1
pla
sta K.CTime.ModDay
inc K.CTime.Div60
bne .4
inc K.CTime.Div60+1
bne .4
.5 pla
pla
lda K.CTime.Mod
ldy #S.Time.SECOND
sta (ZPPtr2),y
stz K.CTime.Div3600
.6 lda K.CTime.Div60
sta K.CTime.Mod
sec
sbc #60
pha
lda K.CTime.Div60+1
sbc #0
pha
bcc .7
sta K.CTime.Div60+1
pla
sta K.CTime.Div60
inc K.CTime.Div3600
bne .6
.7 pla
lda K.CTime.Mod
dey ldy #S.Time.MINUTE
sta (ZPPtr2),y
lda K.CTime.Div3600
dey ldy #S.Time.HOUR
sta (ZPPtr2),y
lda K.CTime.DivDay WDAY computation : (DivDay + DAY0) mod 7
clc
adc #DAY0
pha
lda K.CTime.DivDay+1
adc /DAY0
eor #$ff
tax
pla
.8 sta K.CTime.Mod
sec
sbc #7
bcs .8
inx
bne .8
lda K.CTime.Mod
ldy #S.Time.WDAY
sta (ZPPtr2),y
lda #CENTURY0
sta K.CTime.Century
lda #YEAR0
sta K.CTime.Year
K.CTime2Time.Year
.1 ldy K.CTime.Century
lda K.CTime.Year
jsr TIME.IsLeapYearYA if Leap year CS
lda #0 Toggle Carry
rol
eor #1
lsr
lda K.CTime.DivDay
sbc #365
pha
lda K.CTime.DivDay+1
sbc /365
bcc .2
sta K.CTime.DivDay+1
pla
sta K.CTime.DivDay
inc K.CTime.Year
lda K.CTime.Year
cmp #100
bne .1
stz K.CTime.Year
inc K.CTime.Century
bne .1
.2 pla
lda K.CTime.Century
* ldy #S.Time.CENTURY
sta (ZPPtr2)
ldy #S.Time.YEAR
lda K.CTime.Year
sta (ZPPtr2),y
clc
rts
*--------------------------------------
* In :
* Y = Century
* A = Year (0..99)
* if (year mod 400 = 0)
* or
* if not (year mod 100 = 0) and (year mod 4 = 0)
* Out :
* CS = Leap
* CC = Not Leap
*--------------------------------------
TIME.IsLeapYearYA
cmp #0 Year = 00 ?
bne .1 no
tya year = 00, get century in a
and #$3 mod 4 = 0 ?
beq .9 leap year
.8 clc not leap
rts
.1 and #$3 mod 4 = 0 ?
bne .8
.9 sec Leap
rts
*--------------------------------------
K.StrFTime.MDAY .DA #3,#0,#3,#2,#3,#2,#3,#3,#2,#3,#2,#3
K.CTime.DWORD .BS 4
K.CTime.DivDay .BS 2
K.CTime.ModDay .BS 3
K.CTime.Div60 .BS 2
K.CTime.Div3600 .BS 1
K.CTime.Mod .BS 1
K.CTime.Century .BS 1
K.CTime.Year .BS 1
*/--------------------------------------
* # StrFTime
* ## C
* Convert S.TIME struct to CSTR
* `size_t strftime (char* ptr, const char* format, const struct S.TIME* timeptr );`
* ## ASM
* `PUSHW timeptr`
* `PUSHW format`
* + %a : Abbreviated weekday name : Thu
* + %A : Full weekday name : Thursday
* + %b : Abbreviated month name : Aug
* + %B : Full month name : August
* + %d : Day of the month, zero-padded (01-31)
* + %H : Hour in 24h format (00-23) 14
* + %I : Hour in 12h format (01-12) 02
* + %m : Month as a decimal number (01-12) 08
* + %M : Minute (00-59) 55
* + %p : AM or PM designation PM
* + %S : Second (00-61) 02
* + %w : Weekday as a decimal number with Sunday as 0 (0-6)
* + %y : Year, last two digits (00-99)
* + %Y : Year four digits 2001
* `>LDYA ptr`
* `>SYSCALL strftime`
* ## RETURN VALUE
* none. always succeed.
*\--------------------------------------
K.StrFTime jsr MEM.SPtr1PPtr2
>PULLW ZPPtr3 timeptr
ldy #0
.1 lda (ZPPtr2),y
beq .8
iny
cmp #'%'
beq .2
jsr K.StrFTime.addChar
bra .1
.2 ldx #K.StrFTime.JMPL-K.StrFTime.Tbl-1
lda (ZPPtr2),y
beq .8
iny
.3 cmp K.StrFTime.Tbl,x
beq .4
dex
bpl .3
bra .1
.4 lda K.StrFTime.JMPL,x
sta .5+1
lda K.StrFTime.JMPH,x
sta .5+2
phy
.5 jsr $ffff
ply
bra .1
.8 lda #0 Terminate C string
sta (ZPPtr1)
rts
*--------------------------------------
K.StrFTime.TBL .AS "aAbBdHImMpSwyY"
K.StrFTime.JMPL .DA #K.StrFTime.A
.DA #K.StrFTime.AA
.DA #K.StrFTime.B
.DA #K.StrFTime.BB
.DA #K.StrFTime.D
.DA #K.StrFTime.HH
.DA #K.StrFTime.II
.DA #K.StrFTime.M
.DA #K.StrFTime.MM
.DA #K.StrFTime.P
.DA #K.StrFTime.SS
.DA #K.StrFTime.W
.DA #K.StrFTime.Y
.DA #K.StrFTime.YY
*--------------------------------------
K.StrFTime.JMPH .DA /K.StrFTime.A
.DA /K.StrFTime.AA
.DA /K.StrFTime.B
.DA /K.StrFTime.BB
.DA /K.StrFTime.D
.DA /K.StrFTime.HH
.DA /K.StrFTime.II
.DA /K.StrFTime.M
.DA /K.StrFTime.MM
.DA /K.StrFTime.P
.DA /K.StrFTime.SS
.DA /K.StrFTime.W
.DA /K.StrFTime.Y
.DA /K.StrFTime.YY
*--------------------------------------
K.StrFTime.A ldx #3 Short day of week, 3 chars...
.HS 2C Bit abs
K.StrFTime.AA ldx #15 full DoW
>LDYAI K.StrFTime.DAY
>STYA ZPPtr4
ldy #S.Time.WDAY
bra K.StrFTime.STR
K.StrFTime.B ldx #3 Short Month, 3 chars....
.HS 2C Bit abs
K.StrFTime.BB ldx #15 full Month....
>LDYAI K.StrFTime.MON
>STYA ZPPtr4
ldy #S.Time.MONTH
K.StrFTime.STR lda (ZPPtr3),y get required S.Time field value
tay
beq .9 Illegal value
.1 dey range 0..x
beq .2
lda (ZPPtr4)
sec
adc ZPPtr4
sta ZPPtr4
bcc .1
inc ZPPtr4+1
bra .1
.2
* ldy #0 Y is already 0
.3 iny
lda (ZPPtr4),y
jsr K.StrFTime.addChar
tya
cmp (ZPPtr4)
beq .8
dex
bne .3
.8 rts
.9 ldx #3
lda #'?'
.99 jsr K.StrFTime.addChar
dex
bne .99
rts
*--------------------------------------
K.StrFTime.D ldy #S.Time.DAY
bra K.StrFTime.addDecPtr1Y
K.StrFTime.HH ldy #S.Time.HOUR
bra K.StrFTime.addDecPtr1Y
K.StrFTime.II ldy #S.Time.HOUR
lda (ZPPtr3),y
cmp #12
bcc .1
sbc #12
.1 bra K.StrFTime.addDecA
K.StrFTime.M ldy #S.Time.MONTH
bra K.StrFTime.addDecPtr1Y
K.StrFTime.MM ldy #S.Time.MINUTE
bra K.StrFTime.addDecPtr1Y
K.StrFTime.P ldy #S.Time.HOUR
lda (ZPPtr3),y
cmp #12
bcc .1
lda #'p'
.HS 2C bit abs
.1 lda #'a'
jsr K.StrFTime.addChar
lda #'m'
bra K.StrFTime.addChar
K.StrFTime.SS ldy #S.Time.SECOND
bra K.StrFTime.addDecPtr1Y
K.StrFTime.W ldy #S.Time.WDAY
bra K.StrFTime.addDecPtr1Y
K.StrFTime.YY ldy #S.Time.CENTURY
jsr K.StrFTime.addDecPtr1Y
K.StrFTime.Y ldy #S.Time.YEAR
*--------------------------------------
K.StrFTime.addDecPtr1Y
lda (ZPPtr3),y
K.StrFTime.addDecA
stz .2+1
ldx #8
sed
.1 asl
pha
.2 lda #$ff Self Modified
adc .2+1
sta .2+1
pla
dex
bne .1
cld
lda .2+1
pha
lsr
lsr
lsr
lsr
ora #$30
jsr K.StrFTime.addChar
pla
and #$0f
ora #$30
*--------------------------------------
K.StrFTime.addChar
sta (ZPPtr1)
inc ZPPtr1
bne .8
inc ZPPtr1+1
.8 rts
*--------------------------------------
K.StrFTime.DAY >PSTR "Monday"
>PSTR "Tuesday"
>PSTR "Wednesday"
>PSTR "Thursday"
>PSTR "Friday"
>PSTR "Saturday"
>PSTR "Sunday"
*--------------------------------------
K.StrFTime.MON >PSTR "January"
>PSTR "February"
>PSTR "March"
>PSTR "April"
>PSTR "May"
>PSTR "June"
>PSTR "July"
>PSTR "August"
>PSTR "September"
>PSTR "October"
>PSTR "November"
>PSTR "December"
*--------------------------------------
MAN
SAVE /A2OSX.SRC/SYS/KERNEL.S.TIME
LOAD /A2OSX.SRC/SYS/KERNEL.S
ASM
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