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82 lines
906 B
ArmAsm
82 lines
906 B
ArmAsm
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; Ullrich von Bassewitz, 31.05.1998
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;
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; Several small file stream functions
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;
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.export _clearerr, _feof, _ferror, _fileno, _fflush
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.import return0
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.import __errno
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.importzp ptr1
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;
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; Get the FILE* parameter, check if the file is open
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;
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getf: sta ptr1
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stx ptr1+1
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ldy #1
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lda (ptr1),y ; get f->f_flags
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and #$01 ; file open?
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beq @L1 ; jump if no
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clc ; ok
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rts
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@L1: sec
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rts
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;
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; void clearerr (FILE* f);
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;
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_clearerr:
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jsr getf
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bcs err
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lda (ptr1),y
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and #$F9
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sta (ptr1),y
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err: rts
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;
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; int feof (FILE* f);
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;
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_feof:
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jsr getf
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; bcs err
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lda (ptr1),y
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and #$02
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ldx #0
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rts
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;
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; int ferror (FILE* f);
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;
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_ferror:
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jsr getf
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; bcs err
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lda (ptr1),y
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and #$04
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ldx #0
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rts
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;
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; int fileno (FILE* f);
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;
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_fileno:
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jsr getf
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; bcs err
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dey
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lda (ptr1),y
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ldx #0
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rts
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;
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; int __fastcall__ fflush (FILE* f);
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;
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_fflush = return0
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