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23 lines
522 B
ArmAsm
23 lines
522 B
ArmAsm
;
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; Colin Leroy-Mira, 4 Sept. 2024
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;
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; char* stpcpy (char* dest, const char* src);
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;
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.export _stpcpy
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.import _strcpy
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.importzp tmp1, ptr2
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_stpcpy:
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jsr _strcpy
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ldx ptr2+1 ; Load dest pointer's last high byte
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tya ; Get the last offset strcpy wrote to
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clc
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adc ptr2 ; Add to low byte value
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bcc :+
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inx
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: rts ; Return pointer to dest's terminator
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