A2osX/SYS/KERNEL.S.TIME.txt

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NEW
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AUTO 3,1
*--------------------------------------
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* https://www.cise.ufl.edu/~cop4600/cgi-bin/lxr/http/source.cgi/lib/ansi/gmtime.c
*--------------------------------------
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SECSDAY .EQ 86400 60*60*24
CENTURY0 .EQ 19
YEAR0 .EQ 70
DAY0 .EQ 4 day 0 was a thursday
*/--------------------------------------
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* # Time
* Get System Time in Buffer
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* ## C
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* `time_t time (S.TIME* timer);`
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* ## ASM
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* `>LDYA timer`
* `>SYSCALL time`
* ## RETURN VALUE
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* S.TIME filled with System date/time
*\--------------------------------------
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K.Time >PUSHYA
>MLICALL MLIGETTIME
>LDYAI DATELO
*/--------------------------------------
* # PTime2Time
* Convert ProDOS Time To S.TIME
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* ## C
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* `int PTime2Time (long* ptime, S.TIME* timer);`
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* ## ASM
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* `>PUSHW timer`
* `>LDYA ptime`
* `>SYSCALL PTime2Time`
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* ## RETURN VALUE
*\--------------------------------------
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K.PTime2Time jsr SHARED.SPtr1PPtr2
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ldy #1
lda (ZPPtr1),y Get Year
lsr C is high bit of month
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ldy #S.Time.YEAR
sta (ZPPtr2),y set year
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sta ACC32+3 for conputing Century/WDAY later
lda (ZPPtr1) Get Month/day
pha save Day
ror
lsr
lsr
lsr
lsr
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ldy #S.Time.MONTH
sta (ZPPtr2),y set month
pla get back day
and #$1F
iny
sta (ZPPtr2),y set day
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lda ACC32+3 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
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sta ACC32+2 for conputing WDAY later
ldy #2
lda (ZPPtr1),y Get Min
tax
iny
lda (ZPPtr1),y Get Hour
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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)
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*--------------------------------------
* 1/1/1970 was Thursday...if not leap, add one, if leap add 2
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*--------------------------------------
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K.ComputeWDAY lda #DAY0-1 Thursday : 4 (-1 for mod 7)
pha
lda #19
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sta ACC32
lda #70
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sta ACC32+1
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.1 ldy ACC32
lda ACC32+1
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cpy ACC32+2
bne .2
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cmp ACC32+3
beq .4
.2 jsr TIME.IsLeapYearYA CS = Leap
pla
adc #1
cmp #7
bcc .3
sbc #7 MOD 7
.3 pha
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inc ACC32+1
lda ACC32+1
cmp #100
bne .1
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stz ACC32+1
inc ACC32
bra .1
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*--------------------------------------
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.4 ldy #S.Time.MONTH
lda (ZPPtr2),y get month
tax
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.5 lda K.StrFTime.MDAY-1,x get day count in this month
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clc
bne .6 february ?
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ldy ACC32+2
lda ACC32+3
jsr TIME.IsLeapYearYA CS = Leap
.6 pla
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adc K.StrFTime.MDAY-1,x
cmp #7
bcc .7
sbc #7
.7 pha
dex
bne .5
pla
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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
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ldy #S.Time.WDAY
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sta (ZPPtr2),y
clc
rts
*/--------------------------------------
* # CTime2Time
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* Convert CTime Time To S.TIME
* ## C
* `int CTime2Time (long* ctime, S.TIME* timer);`
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* ## ASM
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* `>PUSHW timer`
* `>LDYA ctime`
* `>SYSCALL CTime2Time`
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* ## RETURN VALUE
*\--------------------------------------
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K.CTime2Time jsr SHARED.SPtr1PPtr2
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ldy #3
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.1 lda (ZPPtr1),y
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sta ARG32,y ARG = ctime
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dey
bpl .1
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lda #SECSDAY ACC = SECSDAY
sta ACC32
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lda /SECSDAY
sta ACC32+1
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lda ^SECSDAY
sta ACC32+2
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stz ACC32+3
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jsr MATH.DIVMOD32 ARG32 = Days, TMP32 = remaining secs
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lda ARG32 WDAY computation : (ARG32 + DAY0) mod 7
clc
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adc #DAY0
pha
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lda ARG32+1 65535 days = 179 years
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adc /DAY0
eor #$ff
tax
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pla
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.2 tay
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sec
sbc #7
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bcs .2
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inx
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bne .2
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tya
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ldy #S.Time.WDAY
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sta (ZPPtr2),y
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ldy #CENTURY0
sty ZPPtr3
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lda #YEAR0
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sta ZPPtr3+1
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K.CTime2Time.Year
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.1 ldy ZPPtr3
lda ZPPtr3+1
jsr TIME.IsLeapYearYA if Leap year CS
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rol Toggle Carry
eor #1
lsr
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lda ARG32
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sbc #365
pha
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lda ARG32+1
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sbc /365
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bcc .2
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sta ARG32+1
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pla
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sta ARG32
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inc ZPPtr3
lda ZPPtr3
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cmp #100
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bne .1
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stz ZPPtr3
inc ZPPtr3+1
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bne .1
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.2 pla
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lda ZPPtr3+1
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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 ZPPtr3
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sta (ZPPtr2),y
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K.CTime2Time.HMS
ldx #3
.1 lda TMP32,x
sta ARG32,x
dex
bpl .1
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ldy #S.TIME.SECOND
jsr .2
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dey #S.TIME.MINUTE
jsr .2
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dey #S.TIME.HOUR
lda ARG32
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sta (ZPPtr2),y
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clc
rts
.2 phy
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lda #60
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jsr MATH.A2ACC32
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jsr MATH.DIVMOD32
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ply
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lda TMP32
sta (ZPPtr2),y
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rts
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*--------------------------------------
* In :
* Y = Century
* A = Year (0..99)
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* if (year mod 400 = 0)
* or
* if not (year mod 100 = 0) and (year mod 4 = 0)
* Out :
* CS = Leap
* CC = Not Leap
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*--------------------------------------
TIME.IsLeapYearYA
cmp #0 Year = 00 ?
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bne .1 no
tya year = 00, get century in a
and #$3 mod 4 = 0 ?
beq .9 leap year
.8 clc not leap
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rts
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.1 and #$3 mod 4 = 0 ?
bne .8
.9 sec Leap
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rts
*--------------------------------------
K.StrFTime.MDAY .DA #3,#0,#3,#2,#3,#2,#3,#3,#2,#3,#2,#3
*/--------------------------------------
* # StrFTime
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* ## C
* Convert S.TIME struct to CSTR
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* `void strftime (char* ptr, const char* format, const struct S.TIME* timeptr );`
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* ## ASM
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* `PUSHW timeptr`
* `PUSHW format`
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* + %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
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* `>LDYA ptr`
* `>SYSCALL strftime`
* ## RETURN VALUE
* none. always succeed.
*\--------------------------------------
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K.StrFTime jsr SHARED.SPtr1PPtr2
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>PULLW ZPPtr3 timeptr
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.1 jsr SHARED.GetCharPtr2
beq .8
cmp #'%'
beq .2
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jsr SHARED.PutCharPtr1
bra .1
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.2 ldx #K.StrFTime.Cnt-1
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jsr SHARED.GetCharPtr2
beq .8
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.3 cmp K.StrFTime.Tbl,x
beq .4
dex
bpl .3
bra .1
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.4 cpx #7
bcc .5
jsr K.StrFTime.AtX
bra .1
.5 txa
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asl
tax
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jsr .7
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bra .1
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.7 jmp (K.StrFTime.JMP,x)
.8 lda #0 Terminate C string
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sta (ZPPtr1)
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clc
rts
*--------------------------------------
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K.StrFTime.Tbl .AS "aAbBIpYydHSwmM"
K.StrFTime.Cnt .EQ *-K.StrFTime.TBL
K.StrFTime.OfsX .DA #S.Time.YEAR,#S.Time.DAY,#S.Time.HOUR,#S.Time.SECOND,#S.Time.WDAY,#S.Time.MONTH,#S.Time.MINUTE
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K.StrFTime.JMP .DA K.StrFTime.A
.DA K.StrFTime.AA
.DA K.StrFTime.B
.DA K.StrFTime.BB
.DA K.StrFTime.II
.DA K.StrFTime.P
.DA K.StrFTime.YY
*--------------------------------------
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K.StrFTime.A sec Short day of week, 3 chars...
.HS 90 BCC
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K.StrFTime.AA clc full DoW
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lda #K.StrFTime.DAY
ldx /K.StrFTime.DAY
ldy #S.Time.WDAY
bra K.StrFTime.STR
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K.StrFTime.B sec Short Month, 3 chars....
.HS 90 BCC
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K.StrFTime.BB clc full Month....
lda #K.StrFTime.MON
ldx /K.StrFTime.MON
ldy #S.Time.MONTH
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K.StrFTime.STR sta ZPPtr4
stx ZPPtr4+1
ldx #15
bcc .10
ldx #3
.10 lda (ZPPtr3),y get required S.Time field value
tay
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beq .2 Illegal value, print ???
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.1 lda (ZPPtr4)
sec
adc ZPPtr4
sta ZPPtr4
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bcc .11
inc ZPPtr4+1
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.11 dey
bne .1
.2
* ldy #0 Y is already 0
.3 iny
lda (ZPPtr4),y
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jsr SHARED.PutCharPtr1
tya
cmp (ZPPtr4)
beq .8
dex
bne .3
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.8 rts
*--------------------------------------
K.StrFTime.II ldy #S.Time.HOUR
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lda (ZPPtr3),y
cmp #12
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bcc K.StrFTime.addDecA
sbc #12
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bra K.StrFTime.addDecA
K.StrFTime.P ldy #S.Time.HOUR
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lda (ZPPtr3),y
cmp #12
bcc .1
lda #'p'
.HS 2C bit abs
.1 lda #'a'
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jsr SHARED.PutCharPtr1
lda #'m'
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jmp SHARED.PutCharPtr1
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K.StrFTime.YY ldy #S.Time.CENTURY
jsr K.StrFTime.addDecPtr1Y
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ldx #7 "y"
K.StrFTime.AtX ldy K.StrFTime.OfsX-7,x
*--------------------------------------
K.StrFTime.addDecPtr1Y
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lda (ZPPtr3),y
K.StrFTime.addDecA
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ldx #2
ldy #'0'
clc
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jsr MATH.A2STR10
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lda A2osX.NumStrBuf
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jsr SHARED.PutCharPtr1
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lda A2osX.NumStrBuf+1
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jmp SHARED.PutCharPtr1
*--------------------------------------
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K.StrFTime.DAY >PSTR "???"
>PSTR "Monday"
>PSTR "Tuesday"
>PSTR "Wednesday"
>PSTR "Thursday"
>PSTR "Friday"
>PSTR "Saturday"
>PSTR "Sunday"
*--------------------------------------
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K.StrFTime.MON >PSTR "???"
>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
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SAVE USR/SRC/SYS/KERNEL.S.TIME
LOAD USR/SRC/SYS/KERNEL.S
ASM