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Simplify date code, merge padding

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This commit is contained in:
Joshua Bell 2018-12-02 20:00:17 -08:00
parent 44f474346f
commit b22210eee6
1 changed files with 51 additions and 49 deletions
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100
desktop/desktop_main.s
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@ -7692,11 +7692,9 @@ value: .word 0
.endproc
PAD_TO $830F ; Maintain previous addresses
;;; ============================================================
compose_date_string:
.proc compose_date_string
ldx #21
lda #' '
: sta text_buffer2::data-1,x
@ -7707,18 +7705,32 @@ compose_date_string:
copy16 #text_buffer2::length, $8
lda date ; any bits set?
ora date+1
bne prep_date_strings
bne append_date_strings
sta month ; 0 is "no date" string
jmp prep_month_string
jmp append_month_string
prep_date_strings:
append_date_strings:
;; TODO: Handle ProDOS 2.5 extended dates
;; Year
lda #0
sta year+1
lda date+1
and #$FE ; extract year
and #%11111110
lsr a
sta year
lda date+1 ; extract month
;; Per ProDOS Tech Note #28, 40-99 is 1940-1999, 0-39 is 2000-2039
;; http://www.1000bit.it/support/manuali/apple/technotes/pdos/tn.pdos.28.html
cmp #40 ; 40-99 (and also 100-127, though non-conforming)
bcs y1900
y2000: add16 #2000, year, year
jmp :+
y1900: add16 #1900, year, year
;; Month
: lda date+1
ror a
lda date
ror a
@ -7727,51 +7739,38 @@ prep_date_strings:
lsr a
lsr a
sta month
lda date ; extract day
and #$1F
;; Day
lda date
and #%00011111
sta day
jsr prep_month_string
jsr prep_day_string
jmp prep_year_string
jsr append_month_string
addr_call concatenate_date_part, str_space
jsr append_day_string
addr_call concatenate_date_part, str_space
jmp append_year_string
.proc prep_day_string
.proc append_day_string
lda day
ldx #0
jsr int_to_string
ldax #str_from_int
addr_call concatenate_date_part, str_from_int
addr_jump concatenate_date_part, str_space
addr_jump concatenate_date_part, str_from_int
.endproc
.proc prep_month_string
.proc append_month_string
lda month
asl a
tay
lda month_table+1,y
tax
lda month_table,y
jmp concatenate_date_part
.endproc
.proc prep_year_string
;; On input, only low byte of year is set (0...99)
lda #0
sta year+1
lda year
cmp #100 ; if > 100, assume 1900+n
bcs y1900
cmp #40
bcs y1900
y2000: add16 #2000, year, year
jmp stringify
y1900: add16 #1900, year, year
stringify:
.proc append_year_string
ldax year
jsr int_to_string
addr_jump concatenate_date_part, str_from_int
@ -7787,22 +7786,23 @@ month_table:
.addr str_jul,str_aug,str_sep,str_oct,str_nov,str_dec
str_no_date:
PASCAL_STRING "(no date)"
PASCAL_STRING "no date"
str_jan:PASCAL_STRING "January "
str_feb:PASCAL_STRING "February "
str_mar:PASCAL_STRING "March "
str_apr:PASCAL_STRING "April "
str_may:PASCAL_STRING "May "
str_jun:PASCAL_STRING "June "
str_jul:PASCAL_STRING "July "
str_aug:PASCAL_STRING "August "
str_sep:PASCAL_STRING "September "
str_oct:PASCAL_STRING "October "
str_nov:PASCAL_STRING "November "
str_dec:PASCAL_STRING "December "
str_jan:PASCAL_STRING "January"
str_feb:PASCAL_STRING "February"
str_mar:PASCAL_STRING "March"
str_apr:PASCAL_STRING "April"
str_may:PASCAL_STRING "May"
str_jun:PASCAL_STRING "June"
str_jul:PASCAL_STRING "July"
str_aug:PASCAL_STRING "August"
str_sep:PASCAL_STRING "September"
str_oct:PASCAL_STRING "October"
str_nov:PASCAL_STRING "November"
str_dec:PASCAL_STRING "December"
str_space: PASCAL_STRING " "
str_space:
PASCAL_STRING " "
.proc concatenate_date_part
stax $06
@ -7829,6 +7829,8 @@ str_space: PASCAL_STRING " "
tmp: .byte 0
concat_len:
.byte 0
.endproc
.endproc
PAD_TO $84D1 ; Maintain previous addresses