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https://github.com/hsoft/collapseos.git
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98 lines
1.7 KiB
NASM
98 lines
1.7 KiB
NASM
; *** SHELL COMMANDS ***
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fsOnCmd:
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.db "fson", 0, 0, 0
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jp fsOn
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; Lists filenames in currently active FS
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flsCmd:
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.db "fls", 0, 0, 0, 0
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call fsIsOn
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jr nz, .error
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call fsBegin
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jr nz, .error
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.loop:
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call fsIsDeleted
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jr z, .skip
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ld hl, FS_META+FS_META_FNAME_OFFSET
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call printstr
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call printcrlf
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.skip:
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call fsNext
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jr z, .loop ; Z set? fsNext was successful
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xor a
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jr .end
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.error:
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ld a, FS_ERR_NO_FS
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.end:
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ret
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; Takes one byte block number to allocate as well we one string arg filename
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; and allocates a new file in the current fs.
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fnewCmd:
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.db "fnew", 0b001, 0b1001, 0b001
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push hl
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ld a, (hl)
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inc hl
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call intoHL
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call fsAlloc
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pop hl
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xor a
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ret
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; Deletes filename with specified name
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fdelCmd:
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.db "fdel", 0b1001, 0b001, 0
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push hl
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push de
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call intoHL ; HL now holds the string we look for
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call fsFindFN
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jr nz, .notfound
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; Found! delete
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xor a
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; Set filename to zero to flag it as deleted
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ld (FS_META+FS_META_FNAME_OFFSET), a
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call fsWriteMeta
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; a already to 0, our result.
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jr .end
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.notfound:
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ld a, FS_ERR_NOT_FOUND
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.end:
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pop de
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pop hl
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ret
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; Opens specified filename in specified file handle.
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; First argument is file handle, second one is file name.
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; Example: fopn 0 foo.txt
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fopnCmd:
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.db "fopn", 0b001, 0b1001, 0b001
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push hl
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push de
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ld a, (hl) ; file handle index
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ld de, FS_HANDLES
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or a ; cp 0
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jr z, .noInc ; DE already point to correct handle
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ld b, a
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.loop:
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ld a, FS_HANDLE_SIZE
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call addDE
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djnz .loop
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.noInc:
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; DE now stores pointer to file handle
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inc hl
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call intoHL ; HL now holds the string we look for
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call fsFindFN
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jr nz, .notfound
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; Found!
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; FS_PTR points to the file we want to open
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push de \ pop ix ; IX now points to the file handle.
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call fsOpen
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jr .end
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.notfound:
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ld a, FS_ERR_NOT_FOUND
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.end:
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pop de
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pop hl
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ret
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