mirror of
https://github.com/cc65/cc65.git
synced 2024-11-19 06:31:31 +00:00
ca815af077
Change the isxxx functions to correctly handle values outside of character range. git-svn-id: svn://svn.cc65.org/cc65/trunk@33 b7a2c559-68d2-44c3-8de9-860c34a00d81
24 lines
332 B
ArmAsm
24 lines
332 B
ArmAsm
;
|
|
; Ullrich von Bassewitz, 02.06.1998
|
|
;
|
|
; int isblank (int c);
|
|
;
|
|
; cc65 (and GNU) extension.
|
|
;
|
|
|
|
.export _isblank
|
|
.import __ctype
|
|
|
|
_isblank:
|
|
cpx #$00 ; Char range ok?
|
|
bne @L1 ; Jump if no
|
|
tay
|
|
lda __ctype,y ; Get character classification
|
|
and #$80 ; Mask blank bit
|
|
rts
|
|
|
|
@L1: lda #$00 ; Return false
|
|
tax
|
|
rts
|
|
|