forked from KolibriOS/kolibrios
207 lines
3.7 KiB
PHP
207 lines
3.7 KiB
PHP
; System function 70 - files with long names (LFN)
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; diamond, 2006
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iglobal
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; in this table names must be in lowercase
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rootdirs:
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db 2,'rd'
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dd fs_OnRamdisk
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db 7,'ramdisk'
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dd fs_OnRamdisk
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db 2,'fd'
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dd fs_OnFloppy
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db 10,'floppydisk'
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dd fs_OnFloppy
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db 3,'hd0'
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dd fs_OnHd0
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db 3,'hd1'
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dd fs_OnHd1
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db 3,'hd2'
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dd fs_OnHd2
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db 3,'hd3'
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dd fs_OnHd3
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db 0
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endg
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file_system_lfn:
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; in: eax->fileinfo block
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; operation codes:
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; 0 : read file
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; 1 : rewrite file - not implemented yet
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; 2 : delete file - not implemented yet
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; 3 : write/append to file - not implemented yet
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; 4 : create directory - not implemented yet
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; 5 : rename file/directory - not implemented yet
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; 6 : get file attributes structure - not implemented yet
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; 7 : start application - not implemented yet
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; 8 : find file with mask - not implemented yet
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; parse file name
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xchg ebx, eax
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lea esi, [ebx+20]
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lodsb
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cmp al, '/'
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jz @f
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.notfound:
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mov dword [esp+36], 5 ; file not found
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ret
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@@:
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cmp byte [esi], 0
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jz .rootdir
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mov edi, rootdirs-4
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xor ecx, ecx
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push esi
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.scan1:
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pop esi
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add edi, ecx
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scasd
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mov cl, byte [edi]
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jecxz .notfound
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inc edi
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push esi
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@@:
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lodsb
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or al, 20h
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scasb
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loopz @b
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jnz .scan1
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pop eax
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lodsb
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cmp al, '/'
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jz .found1
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test al, al
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jnz .scan1
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; directory /xxx
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.maindir:
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; directory /
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.rootdir:
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mov dword [esp+36], 10 ; access denied
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ret
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.found1:
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cmp byte [esi], 0
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jz .maindir
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mov ebp, dword [edi] ; handler for this device
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; read partition number
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xor ecx, ecx
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xor eax, eax
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@@:
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lodsb
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cmp al, '/'
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jz .done1
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test al, al
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jz .done1
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sub al, '0'
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cmp al, 9
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ja .notfound
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imul ecx, 10
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add ecx, eax
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jmp @b
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.done1:
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test ecx, ecx
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jz .notfound
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test al, al
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jnz @f
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dec esi
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@@:
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; now ebp contains handler address, ecx - partition number, esi points to ASCIIZ string - rest of name
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jmp ebp
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; handlers for devices
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; in: ecx = partition number
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; esi -> relative (for device) name
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; ebx -> fileinfo
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; out: [esp+36]=image of eax, [esp+24]=image of ebx
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fs_OnRamdisk:
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cmp ecx, 1
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jnz file_system_lfn.notfound
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movzx eax, byte [ebx]
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test eax, eax
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jnz .not_impl
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mov ecx, [ebx+12]
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mov edx, [ebx+16]
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add edx, std_application_base_address
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add ebx, 4
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call dword [fs_RamdiskServices + eax*4]
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mov [esp+36], eax
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mov [esp+24], ebx
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ret
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.not_impl:
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mov dword [esp+36], 2 ; not implemented
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ret
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fs_RamdiskServices:
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dd fs_RamdiskRead
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fs_OnFloppy:
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cmp ecx, 2
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ja file_system_lfn.notfound
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movzx eax, byte [ebx]
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test eax, eax
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jnz fs_OnRamdisk.not_impl
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call reserve_flp
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mov [flp_number], cl
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mov ecx, [ebx+12]
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mov edx, [ebx+16]
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add edx, std_application_base_address
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add ebx, 4
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call dword [fs_FloppyServices + eax*4]
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and [flp_status], 0
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mov [esp+36], eax
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mov [esp+24], ebx
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ret
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fs_FloppyServices:
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dd fs_FloppyRead
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fs_OnHd0:
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call reserve_hd1
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mov [hdbase], 0x1F0
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mov [hdid], 0
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push 1
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jmp fs_OnHd
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fs_OnHd1:
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call reserve_hd1
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mov [hdbase], 0x1F0
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mov [hdid], 0x10
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push 2
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jmp fs_OnHd
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fs_OnHd2:
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call reserve_hd1
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mov [hdbase], 0x170
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mov [hdid], 0
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push 3
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jmp fs_OnHd
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fs_OnHd3:
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call reserve_hd1
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mov [hdbase], 0x170
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mov [hdid], 0x10
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push 4
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fs_OnHd:
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pop eax
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mov [hdpos], eax
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cmp ecx, [0x40001+eax]
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jbe @f
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and [hd1_status], 0
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mov dword [esp+36], 5 ; not found
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ret
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@@:
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mov [fat32part], ecx
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push ebx esi
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call choice_necessity_partition_1
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pop esi ebx
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mov ecx, [ebx+12]
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mov edx, [ebx+16]
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add edx, std_application_base_address
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movzx eax, byte [ebx]
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add ebx, 4
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call dword [fs_HdServices + eax*4]
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and [hd1_status], 0
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mov [esp+36], eax
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mov [esp+24], ebx
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ret
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fs_HdServices:
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dd fs_HdRead
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