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126 lines
2.2 KiB
ArmAsm
126 lines
2.2 KiB
ArmAsm
;
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; Christian Groessler, Dec-2001
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;
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; int remove (const char* name);
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;
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UCASE_FILENAME = 1 ; comment it out if filename shouldn't be uppercased
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.include "atari.inc"
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.include "../common/errno.inc"
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.import findfreeiocb,incsp2,__do_oserror
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.import popax,__oserror,__seterrno
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.importzp tmp1
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.ifdef UCASE_FILENAME
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.import addysp,_strupr,subysp
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.importzp tmp3,ptr4,sp
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.endif
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.export _remove
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.proc _remove
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jsr findfreeiocb
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beq iocbok ; we found one
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jsr incsp2 ; discard stack argument
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lda #<EMFILE ; "too many open files"
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ldx #>EMFILE
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seterr: jsr __seterrno
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lda #$FF
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tax
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rts ; return -1
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iocbok: ;stx tmp1 ; remember IOCB index
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txa
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pha
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jsr popax
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.ifdef UCASE_FILENAME
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;@@@TODO merge with almost same code in open.s
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; we make sure that the filename doesn't contain lowercase letters
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; we copy the filename we got onto the stack, uppercase it and use this
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; one to open the iocb
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; we're using tmp3, ptr4
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; save the original pointer
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sta ptr4
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stx ptr4+1
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; now we need the length of the name
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ldy #0
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loop: lda (ptr4),y
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beq str_end
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cmp #ATEOL ; we also accept Atari EOF char as end of string
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beq str_end
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iny
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bne loop ; not longer than 255 chars (127 real limit)
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toolong:lda #<EINVAL ; file name is too long
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ldx #>EINVAL
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jmp seterr
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str_end:iny ; room for terminating zero
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cpy #128 ; we only can handle lenght < 128
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bcs toolong
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sty tmp3 ; save size
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jsr subysp ; make room on the stack
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; copy filename to the temp. place on the stack
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lda #0 ; end-of-string
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sta (sp),y ; Y still contains length + 1
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dey
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loop2: lda (ptr4),y
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sta (sp),y
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dey
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bpl loop2 ; bpl: this way we only support a max. length of 127
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; uppercase the temp. filename
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ldx sp+1
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lda sp
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jsr _strupr
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; leave X and Y pointing to the modified filename
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lda sp
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ldx sp+1
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.endif ; defined UCASE_FILENAME
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;ldy tmp1
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sta tmp1
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pla
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tay
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lda tmp1
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sty tmp1
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sta ICBAL,y
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txa
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sta ICBAH,y
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ldx tmp1
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lda #DELETE
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sta ICCOM,x
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lda #0
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sta ICAX1,x
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sta ICAX2,x
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sta ICBLL,x
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sta ICBLH,x
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jsr CIOV
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.ifdef UCASE_FILENAME
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; php
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tya
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pha
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ldy tmp3 ; get size
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jsr addysp ; free used space on the stack
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pla
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tay
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; plp
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.endif ; defined UCASE_FILENAME
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bmi cioerr
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ldx #0
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stx __oserror
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txa
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rts
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cioerr: jmp __do_oserror
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.endproc ; _remove
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