; isgraph.s
;
; This file is part of
; cc65 - a freeware C compiler for 6502 based systems
;
; https://github.com/cc65/cc65
;
; See "LICENSE" file for legal information.
;
; int isgraph (int c);
;

        .export         _isgraph
        .include        "ctype.inc"
        .import         ctype_preprocessor

_isgraph:
        jsr     ctype_preprocessor      ; (clears always x)
        bcs     @L1                     ; out of range? (everything already clear -> false)
        and     #CT_CTRL_SPACE  		; mask character bits
        cmp     #1             			; if false, then set "borrow" flag
        lda     #0
        sbc     #0              		; invert logic (return NOT control and NOT space)
@L1:    rts