| 0,0 → 1,661 |
|---|
| ; System function 70 - files with long names (LFN) |
| ; diamond, 2006 |
| |
| iglobal |
| ; in this table names must be in lowercase |
| rootdirs: |
| db 2,'rd' |
| dd fs_OnRamdisk |
| dd fs_NextRamdisk |
| db 7,'ramdisk' |
| dd fs_OnRamdisk |
| dd fs_NextRamdisk |
| db 2,'fd' |
| dd fs_OnFloppy |
| dd fs_NextFloppy |
| db 10,'floppydisk' |
| dd fs_OnFloppy |
| dd fs_NextFloppy |
| db 3,'hd0' |
| dd fs_OnHd0 |
| dd fs_NextHd0 |
| db 3,'hd1' |
| dd fs_OnHd1 |
| dd fs_NextHd1 |
| db 3,'hd2' |
| dd fs_OnHd2 |
| dd fs_NextHd2 |
| db 3,'hd3' |
| dd fs_OnHd3 |
| dd fs_NextHd3 |
| ;********************************************** |
| db 3,'cd0' |
| dd fs_OnCd0 |
| dd fs_NextCd |
| db 3,'cd1' |
| dd fs_OnCd1 |
| dd fs_NextCd |
| db 3,'cd2' |
| dd fs_OnCd2 |
| dd fs_NextCd |
| db 3,'cd3' |
| dd fs_OnCd3 |
| dd fs_NextCd |
| ;*********************************************** |
| db 0 |
| |
| |
| virtual_root_query: |
| dd fs_HasRamdisk |
| db 'rd',0 |
| dd fs_HasFloppy |
| db 'fd',0 |
| dd fs_HasHd0 |
| db 'hd0',0 |
| dd fs_HasHd1 |
| db 'hd1',0 |
| dd fs_HasHd2 |
| db 'hd2',0 |
| dd fs_HasHd3 |
| db 'hd3',0 |
| ;********************************************** |
| dd fs_HasCd0 |
| db 'cd0',0 |
| dd fs_HasCd1 |
| db 'cd1',0 |
| dd fs_HasCd2 |
| db 'cd2',0 |
| dd fs_HasCd3 |
| db 'cd3',0 |
| ;********************************************** |
| dd 0 |
| endg |
| |
| file_system_lfn: |
| ; in: eax->fileinfo block |
| ; operation codes: |
| ; 0 : read file |
| ; 1 : read folder |
| ; 2 : create/rewrite file |
| ; 3 : write/append to file - not implemented yet |
| ; 4 : set end of file - not implemented yet |
| ; 5 : get file/directory attributes structure |
| ; 6 : set file/directory attributes structure |
| ; 7 : start application |
| ; 8 : delete file - not implemented yet |
| ; 9 : create directory - not implemented yet |
| ; 10: rename file/directory - not implemented yet |
| |
| add eax, std_application_base_address |
| ; parse file name |
| xchg ebx, eax |
| lea esi, [ebx+20] |
| mov ebp, esi ; for 'start app' function full path must be known |
| lodsb |
| test al, al |
| jnz @f |
| mov esi, [esi] |
| add esi, std_application_base_address |
| mov ebp, esi |
| lodsb |
| @@: |
| cmp al, '/' |
| jz @f |
| .notfound: |
| mov dword [esp+36], 5 ; file not found |
| ret |
| @@: |
| cmp byte [esi], 0 |
| jz .rootdir |
| mov edi, rootdirs-8 |
| xor ecx, ecx |
| push esi |
| .scan1: |
| pop esi |
| add edi, ecx |
| scasd |
| scasd |
| mov cl, byte [edi] |
| jecxz .notfound |
| inc edi |
| push esi |
| @@: |
| lodsb |
| or al, 20h |
| scasb |
| loopz @b |
| jnz .scan1 |
| lodsb |
| cmp al, '/' |
| jz .found1 |
| test al, al |
| jnz .scan1 |
| pop eax |
| ; directory /xxx |
| .maindir: |
| cmp dword [ebx], 1 |
| jnz .access_denied |
| xor eax, eax |
| mov ebp, [ebx+12] |
| mov edx, [ebx+16] |
| add edx, std_application_base_address |
| push dword [ebx+4] ; first block |
| mov ebx, [ebx+8] ; flags |
| mov esi, [edi+4] |
| ; ebx=flags, [esp]=first block, ebp=number of blocks, edx=return area, esi='Next' handler |
| mov edi, edx |
| mov ecx, 32/4 |
| rep stosd |
| mov byte [edx], 1 ; version |
| .maindir_loop: |
| call esi |
| jc .maindir_done |
| inc dword [edx+8] |
| dec dword [esp] |
| jns .maindir_loop |
| dec ebp |
| js .maindir_loop |
| inc dword [edx+4] |
| mov dword [edi], 0x10 ; attributes: folder |
| mov dword [edi+4], 1 ; name type: UNICODE |
| push eax |
| xor eax, eax |
| add edi, 8 |
| mov ecx, 40/4-2 |
| rep stosd |
| pop eax |
| push eax edx |
| ; convert number in eax to decimal UNICODE string |
| push edi |
| push -'0' |
| mov cl, 10 |
| @@: |
| xor edx, edx |
| div ecx |
| push edx |
| test eax, eax |
| jnz @b |
| @@: |
| pop eax |
| add al, '0' |
| stosb |
| test bl, 1 ; UNICODE name? |
| jz .ansi2 |
| mov byte [edi], 0 |
| inc edi |
| .ansi2: |
| test al, al |
| jnz @b |
| mov byte [edi-1], 0 |
| pop edi |
| ; UNICODE name length is 520 bytes, ANSI - 264 |
| add edi, 520 |
| test bl, 1 |
| jnz @f |
| sub edi, 520-264 |
| @@: |
| pop edx eax |
| jmp .maindir_loop |
| .maindir_done: |
| pop eax |
| mov ebx, [edx+4] |
| xor eax, eax |
| dec ebp |
| js @f |
| mov al, ERROR_END_OF_FILE |
| @@: |
| mov [esp+36], eax |
| mov [esp+24], ebx |
| ret |
| ; directory / |
| .rootdir: |
| cmp dword [ebx], 1 ; read folder? |
| jz .readroot |
| .access_denied: |
| mov dword [esp+36], 10 ; access denied |
| ret |
| |
| .readroot: |
| ; virtual root folder - special handler |
| mov esi, virtual_root_query |
| mov ebp, [ebx+12] |
| mov edx, [ebx+16] |
| add edx, std_application_base_address |
| push dword [ebx+4] ; first block |
| mov ebx, [ebx+8] ; flags |
| xor eax, eax |
| ; eax=0, [esp]=first block, ebx=flags, ebp=number of blocks, edx=return area |
| mov edi, edx |
| mov ecx, 32/4 |
| rep stosd |
| mov byte [edx], 1 ; version |
| .readroot_loop: |
| cmp dword [esi], eax |
| jz .readroot_done |
| call dword [esi] |
| add esi, 4 |
| test eax, eax |
| jnz @f |
| .readroot_next: |
| or ecx, -1 |
| xchg esi, edi |
| repnz scasb |
| xchg esi, edi |
| jmp .readroot_loop |
| @@: |
| xor eax, eax |
| inc dword [edx+8] |
| dec dword [esp] |
| jns .readroot_next |
| dec ebp |
| js .readroot_next |
| inc dword [edx+4] |
| mov dword [edi], 0x10 ; attributes: folder |
| mov dword [edi+4], 1 ; name type: UNICODE |
| add edi, 8 |
| mov ecx, 40/4-2 |
| rep stosd |
| push edi |
| @@: |
| lodsb |
| stosb |
| test bl, 1 |
| jz .ansi |
| mov byte [edi], 0 |
| inc edi |
| .ansi: |
| test eax, eax |
| jnz @b |
| pop edi |
| add edi, 520 |
| test bl, 1 |
| jnz .readroot_loop |
| sub edi, 520-264 |
| jmp .readroot_loop |
| .readroot_done: |
| pop eax |
| mov ebx, [edx+4] |
| xor eax, eax |
| dec ebp |
| js @f |
| mov al, ERROR_END_OF_FILE |
| @@: |
| mov [esp+36], eax |
| mov [esp+24], ebx |
| ret |
| |
| .found1: |
| pop eax |
| cmp byte [esi], 0 |
| jz .maindir |
| ; read partition number |
| xor ecx, ecx |
| xor eax, eax |
| @@: |
| lodsb |
| cmp al, '/' |
| jz .done1 |
| test al, al |
| jz .done1 |
| sub al, '0' |
| cmp al, 9 |
| ja .notfound |
| imul ecx, 10 |
| add ecx, eax |
| jmp @b |
| .done1: |
| test ecx, ecx |
| jz .notfound |
| test al, al |
| jnz @f |
| dec esi |
| @@: |
| ; now [edi] contains handler address, ecx - partition number, |
| ; esi points to ASCIIZ string - rest of name |
| jmp dword [edi] |
| |
| ; handlers for devices |
| ; in: ecx = 0 => query virtual directory /xxx |
| ; in: ecx = partition number |
| ; esi -> relative (for device) name |
| ; ebx -> fileinfo |
| ; out: [esp+36]=image of eax, [esp+24]=image of ebx |
| |
| fs_OnRamdisk: |
| cmp ecx, 1 |
| jnz file_system_lfn.notfound |
| mov eax, [ebx] |
| cmp eax, fs_NumRamdiskServices |
| jae .not_impl |
| mov ecx, [ebx+12] |
| mov edx, [ebx+16] |
| add edx, std_application_base_address |
| add ebx, 4 |
| call dword [fs_RamdiskServices + eax*4] |
| mov [esp+36], eax |
| mov [esp+24], ebx |
| ret |
| .not_impl: |
| mov dword [esp+36], 2 ; not implemented |
| ret |
| |
| fs_NotImplemented: |
| mov eax, 2 |
| ret |
| |
| fs_RamdiskServices: |
| dd fs_RamdiskRead |
| dd fs_RamdiskReadFolder |
| dd fs_RamdiskRewrite |
| dd fs_NotImplemented |
| dd fs_NotImplemented |
| dd fs_RamdiskGetFileInfo |
| dd fs_RamdiskSetFileInfo |
| dd fs_RamdiskExecute |
| fs_NumRamdiskServices = ($ - fs_RamdiskServices)/4 |
| |
| fs_OnFloppy: |
| cmp ecx, 2 |
| ja file_system_lfn.notfound |
| mov eax, [ebx] |
| cmp eax, fs_NumFloppyServices |
| jae fs_OnRamdisk.not_impl |
| call reserve_flp |
| mov [flp_number], cl |
| mov ecx, [ebx+12] |
| mov edx, [ebx+16] |
| add edx, std_application_base_address |
| add ebx, 4 |
| call dword [fs_FloppyServices + eax*4] |
| and [flp_status], 0 |
| mov [esp+36], eax |
| mov [esp+24], ebx |
| ret |
| |
| fs_FloppyServices: |
| dd fs_FloppyRead |
| dd fs_FloppyReadFolder |
| dd fs_FloppyRewrite |
| dd fs_NotImplemented |
| dd fs_NotImplemented |
| dd fs_FloppyGetFileInfo |
| dd fs_FloppySetFileInfo |
| dd fs_FloppyExecute |
| fs_NumFloppyServices = ($ - fs_FloppyServices)/4 |
| |
| fs_OnHd0: |
| call reserve_hd1 |
| mov [hdbase], 0x1F0 |
| mov [hdid], 0 |
| push 1 |
| jmp fs_OnHd |
| fs_OnHd1: |
| call reserve_hd1 |
| mov [hdbase], 0x1F0 |
| mov [hdid], 0x10 |
| push 2 |
| jmp fs_OnHd |
| fs_OnHd2: |
| call reserve_hd1 |
| mov [hdbase], 0x170 |
| mov [hdid], 0 |
| push 3 |
| jmp fs_OnHd |
| fs_OnHd3: |
| call reserve_hd1 |
| mov [hdbase], 0x170 |
| mov [hdid], 0x10 |
| push 4 |
| fs_OnHd: |
| call reserve_hd_channel |
| pop eax |
| mov [hdpos], eax |
| cmp ecx, 0x100 |
| jae .nf |
| cmp cl, [0x40001+eax] |
| jbe @f |
| .nf: |
| call free_hd_channel |
| and [hd1_status], 0 |
| mov dword [esp+36], 5 ; not found |
| ret |
| @@: |
| mov [fat32part], ecx |
| push ebx esi |
| call choice_necessity_partition_1 |
| pop esi ebx |
| mov ecx, [ebx+12] |
| mov edx, [ebx+16] |
| add edx, std_application_base_address |
| mov eax, [ebx] |
| cmp eax, fs_NumHdServices |
| jae .not_impl |
| add ebx, 4 |
| call dword [fs_HdServices + eax*4] |
| call free_hd_channel |
| and [hd1_status], 0 |
| mov [esp+36], eax |
| mov [esp+24], ebx |
| ret |
| .not_impl: |
| call free_hd_channel |
| and [hd1_status], 0 |
| mov dword [esp+36], 2 ; not implemented |
| ret |
| |
| fs_HdServices: |
| dd fs_HdRead |
| dd fs_HdReadFolder |
| dd fs_HdRewrite |
| dd fs_NotImplemented |
| dd fs_NotImplemented |
| dd fs_HdGetFileInfo |
| dd fs_HdSetFileInfo |
| dd fs_HdExecute |
| fs_NumHdServices = ($ - fs_HdServices)/4 |
| |
| ;******************************************************* |
| fs_OnCd0: |
| call reserve_cd |
| mov [ChannelNumber],1 |
| mov [DiskNumber],0 |
| push 6 |
| jmp fs_OnCd |
| fs_OnCd1: |
| call reserve_cd |
| mov [ChannelNumber],1 |
| mov [DiskNumber],1 |
| push 4 |
| jmp fs_OnCd |
| fs_OnCd2: |
| call reserve_cd |
| mov [ChannelNumber],2 |
| mov [DiskNumber],0 |
| push 2 |
| jmp fs_OnCd |
| fs_OnCd3: |
| call reserve_cd |
| mov [ChannelNumber],2 |
| mov [DiskNumber],1 |
| push 0 |
| fs_OnCd: |
| call reserve_cd_channel |
| pop eax |
| mov [hdpos], eax |
| cmp ecx, 0x100 |
| jae .nf |
| push cx bx |
| mov cl,al |
| mov bl,[0x40001] |
| shr bl,cl |
| test bl,2 |
| pop bx cx |
| |
| jnz @f |
| .nf: |
| call free_cd_channel |
| and [cd_status], 0 |
| mov dword [esp+36], 5 ; not found |
| ret |
| @@: |
| mov ecx, [ebx+12] |
| mov edx, [ebx+16] |
| add edx, std_application_base_address |
| mov eax, [ebx] |
| cmp eax,fs_NumCdServices |
| jae .not_impl |
| add ebx, 4 |
| call dword [fs_CdServices + eax*4] |
| call free_cd_channel |
| and [cd_status], 0 |
| mov [esp+36], eax |
| mov [esp+24], ebx |
| ret |
| .not_impl: |
| call free_cd_channel |
| and [cd_status], 0 |
| mov dword [esp+36], 2 ; not implemented |
| ret |
| |
| fs_CdServices: |
| dd fs_CdRead |
| dd fs_CdReadFolder |
| dd fs_NotImplemented |
| dd fs_NotImplemented |
| dd fs_NotImplemented |
| dd fs_CdGetFileInfo |
| dd fs_NotImplemented |
| dd fs_CdExecute |
| fs_NumCdServices = ($ - fs_CdServices)/4 |
| |
| ;******************************************************* |
| |
| fs_HasRamdisk: |
| mov al, 1 ; we always have ramdisk |
| ret |
| |
| fs_HasFloppy: |
| cmp byte [0x40000], 0 |
| setnz al |
| ret |
| |
| fs_HasHd0: |
| mov al, [0x40001] |
| and al, 11000000b |
| cmp al, 01000000b |
| setz al |
| ret |
| fs_HasHd1: |
| mov al, [0x40001] |
| and al, 00110000b |
| cmp al, 00010000b |
| setz al |
| ret |
| fs_HasHd2: |
| mov al, [0x40001] |
| and al, 00001100b |
| cmp al, 00000100b |
| setz al |
| ret |
| fs_HasHd3: |
| mov al, [0x40001] |
| and al, 00000011b |
| cmp al, 00000001b |
| setz al |
| ret |
| |
| ;******************************************************* |
| fs_HasCd0: |
| mov al, [0x40001] |
| and al, 11000000b |
| cmp al, 10000000b |
| setz al |
| ret |
| fs_HasCd1: |
| mov al, [0x40001] |
| and al, 00110000b |
| cmp al, 00100000b |
| setz al |
| ret |
| fs_HasCd2: |
| mov al, [0x40001] |
| and al, 00001100b |
| cmp al, 00001000b |
| setz al |
| ret |
| fs_HasCd3: |
| mov al, [0x40001] |
| and al, 00000011b |
| cmp al, 00000010b |
| setz al |
| ret |
| ;******************************************************* |
| |
| ; fs_NextXXX functions: |
| ; in: eax = partition number, from which start to scan |
| ; out: CF=1 => no more partitions |
| ; CF=0 => eax=next partition number |
| |
| fs_NextRamdisk: |
| ; we always have /rd/1 |
| test eax, eax |
| stc |
| jnz @f |
| mov al, 1 |
| clc |
| @@: |
| ret |
| |
| fs_NextFloppy: |
| ; we have /fd/1 iff (([0x40000] and 0xF0) != 0) and /fd/2 iff (([0x40000] and 0x0F) != 0) |
| test byte [0x40000], 0xF0 |
| jz .no1 |
| test eax, eax |
| jnz .no1 |
| inc eax |
| ret ; CF cleared |
| .no1: |
| test byte [0x40000], 0x0F |
| jz .no2 |
| cmp al, 2 |
| jae .no2 |
| mov al, 2 |
| clc |
| ret |
| .no2: |
| stc |
| ret |
| |
| ; on hdx, we have partitions from 1 to [0x40002+x] |
| fs_NextHd0: |
| push 0 |
| jmp fs_NextHd |
| fs_NextHd1: |
| push 1 |
| jmp fs_NextHd |
| fs_NextHd2: |
| push 2 |
| jmp fs_NextHd |
| fs_NextHd3: |
| push 3 |
| fs_NextHd: |
| pop ecx |
| movzx ecx, byte [0x40002+ecx] |
| cmp eax, ecx |
| jae fs_NextFloppy.no2 |
| inc eax |
| clc |
| ret |
| |
| ;******************************************************* |
| fs_NextCd: |
| ; we always have /cdX/1 |
| test eax, eax |
| stc |
| jnz @f |
| mov al, 1 |
| clc |
| @@: |
| ret |
| ;******************************************************* |
| |