mirror of https://github.com/cc65/cc65.git
89 lines
1.6 KiB
ArmAsm
89 lines
1.6 KiB
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, ___directerrno
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.importzp ptr1
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.include "_file.inc"
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.include "errno.inc"
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;
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; Get the FILE* parameter, check if the file is open. Returns zero in A
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; and zero flag set in case of an error.
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.proc getf
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sta ptr1
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stx ptr1+1
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ldy #_FILE::f_flags
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lda (ptr1),y ; get f->f_flags
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and #_FOPEN ; file open?
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rts
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.endproc
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;
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; void clearerr (FILE* f);
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;
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.proc _clearerr
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jsr getf
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beq err
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lda (ptr1),y
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and #<~(_FEOF | _FERROR)
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sta (ptr1),y
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err: rts
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.endproc
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;
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; int feof (FILE* f);
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;
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.proc _feof
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jsr getf
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beq @L1 ; Return 0 on error
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lda (ptr1),y
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and #_FEOF
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@L1: ldx #0
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rts
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.endproc
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;
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; int ferror (FILE* f);
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;
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.proc _ferror
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jsr getf
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beq @L1 ; Return 0 on error
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lda (ptr1),y
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and #_FERROR
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@L1: ldx #0
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rts
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.endproc
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;
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; int fileno (FILE* f);
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;
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.proc _fileno
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jsr getf
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beq error
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ldy #_FILE::f_fd
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lda (ptr1),y
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ldx #0
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rts
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; If the file is not valid, fileno must set errno and return -1
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error: lda #<EBADF
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jmp ___directerrno
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.endproc
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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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