2000-05-28 13:40:48 +00:00
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; Ullrich von Bassewitz, 02.06.1998
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;
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; int isprint (int c);
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;
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.export _isprint
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.import __ctype
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_isprint:
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2000-06-08 18:35:04 +00:00
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cpx #$00 ; Char range ok?
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bne @L1 ; Jump if no
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2000-05-28 13:40:48 +00:00
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tay
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lda __ctype,y ; Get character classification
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eor #$10 ; NOT a control char
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and #$10 ; Mask control char bit
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rts
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2000-06-08 18:35:04 +00:00
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@L1: lda #$00 ; Return false
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tax
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rts
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