mirror of https://github.com/cc65/cc65.git
72 lines
1.7 KiB
ArmAsm
72 lines
1.7 KiB
ArmAsm
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; Oliver Schmidt, 15.08.2018
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;
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; int __fastcall__ clock_settime (clockid_t clk_id, const struct timespec *tp);
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;
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.import __dos_type
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.import incsp1, return0
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.include "time.inc"
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.include "zeropage.inc"
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.include "errno.inc"
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.include "mli.inc"
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_clock_settime:
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; Cleanup stack
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jsr incsp1 ; Preserves A
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; Check for ProDOS 8
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ldy __dos_type
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beq enosys
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; Check for realtme clock
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tay ; Save A
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lda MACHID
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lsr a
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bcs erange
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tya ; Restore A
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; Get tm
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.assert timespec::tv_sec = 0, error
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jsr _localtime
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sta ptr1
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stx ptr1+1
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; Set date
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ldy #tm::tm_mon
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lda (ptr1),y
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clc
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adc #$01 ; Move [0..11] to [1..12]
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asl
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asl
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asl
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asl
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asl
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php ; Save month msb
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ldy #tm::tm_mday
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ora (ptr1),y
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sta DATELO
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ldy #tm::tm_year
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lda (ptr1),y
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cmp #100 ; Year since 1900 < 100?
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bcc :+ ; Yes, leave alone
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sbc #100 ; Move 20xx to 19xx
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: plp ; Restore month msb
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rol
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sta DATELO+1
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; Return success
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jmp return0
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; Load errno code
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enosys: lda #ENOSYS
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bne errno ; Always
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; Load errno code
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erange: lda #ERANGE
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; Set __errno
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errno: jmp ___directerrno
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