mirror of
https://github.com/cc65/cc65.git
synced 2024-11-04 17:04:58 +00:00
22 lines
523 B
ArmAsm
22 lines
523 B
ArmAsm
; isalpha.s
|
|
;
|
|
; This file is part of
|
|
; cc65 - a freeware C compiler for 6502 based systems
|
|
;
|
|
; https://cc65.github.io
|
|
;
|
|
; See "LICENSE" file for legal information.
|
|
;
|
|
; int isalpha (int c);
|
|
;
|
|
|
|
.export _isalpha
|
|
.include "ctype.inc"
|
|
.import ctypemask
|
|
|
|
_isalpha:
|
|
jsr ctypemask ; (always clears X)
|
|
bcs @L1 ; out of range? (everything already clear -> false)
|
|
and #CT_ALPHA ; mask character bits
|
|
@L1: rts
|