1
0
mirror of https://github.com/cc65/cc65.git synced 2024-11-11 16:07:04 +00:00
cc65/libsrc/common/isxdigit.s

22 lines
315 B
ArmAsm
Raw Normal View History

;
; Ullrich von Bassewitz, 02.06.1998
;
; int isxdigit (int c);
;
.export _isxdigit
.include "ctype.inc"
_isxdigit:
cpx #$00 ; Char range ok?
bne @L1 ; Jump if no
tay
lda __ctype,y ; Get character classification
and #CT_XDIGIT ; Mask xdigit bit
rts
@L1: lda #$00 ; Return false
tax
rts