| 0,0 → 1,1143 |
|---|
| ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| ;; ;; |
| ;; Copyright (C) KolibriOS team 2004-2009. All rights reserved. ;; |
| ;; Distributed under terms of the GNU General Public License ;; |
| ;; ;; |
| ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| |
| $Revision$ |
| |
| |
| image_of_eax EQU esp+32 |
| image_of_ebx EQU esp+20 |
| |
| ; 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 |
| |
| fs_additional_handlers: |
| dd biosdisk_handler, biosdisk_enum_root |
| ; add new handlers here |
| dd 0 |
| |
| endg |
| file_system_lfn: |
| ; in: ebx->fileinfo block |
| ; operation codes: |
| ; 0 : read file |
| ; 1 : read folder |
| ; 2 : create/rewrite file |
| ; 3 : write/append to file |
| ; 4 : set end of file |
| ; 5 : get file/directory attributes structure |
| ; 6 : set file/directory attributes structure |
| ; 7 : start application |
| ; 8 : delete file |
| ; 9 : create directory |
| |
| ; parse file name |
| lea esi, [ebx+20] |
| lodsb |
| test al, al |
| jnz @f |
| mov esi, [esi] |
| lodsb |
| @@: |
| cmp al, '/' |
| jz .notcurdir |
| dec esi |
| mov ebp, esi |
| test al, al |
| jnz @f |
| xor ebp, ebp |
| @@: |
| mov esi, [current_slot] |
| mov esi, [esi+APPDATA.cur_dir] |
| jmp .parse_normal |
| .notcurdir: |
| cmp byte [esi], 0 |
| jz .rootdir |
| call process_replace_file_name |
| .parse_normal: |
| cmp dword [ebx], 7 |
| jne @F |
| mov edx, [ebx+4] |
| mov ebx, [ebx+8] |
| call fs_execute ; esi+ebp, ebx, edx |
| mov [image_of_eax], eax |
| ret |
| @@: |
| mov edi, rootdirs-8 |
| xor ecx, ecx |
| push esi |
| .scan1: |
| pop esi |
| add edi, ecx |
| scasd |
| scasd |
| mov cl, byte [edi] |
| test cl, cl |
| jz .notfound_try |
| 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: |
| mov esi, [edi+4] |
| .maindir_noesi: |
| cmp dword [ebx], 1 |
| jnz .access_denied |
| xor eax, eax |
| mov ebp, [ebx+12] ;количество блоков для считывания |
| mov edx, [ebx+16] ;куда записывать рузельтат |
| ; add edx, std_application_base_address |
| push dword [ebx+4] ; first block |
| mov ebx, [ebx+8] ; flags |
| ; ebx=flags, [esp]=first block, ebp=number of blocks, edx=return area, esi='Next' handler |
| mov edi, edx |
| push ecx |
| mov ecx, 32/4 |
| rep stosd |
| pop ecx |
| 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 |
| push ecx |
| mov ecx, 40/4-2 |
| rep stosd |
| pop ecx |
| pop eax |
| push eax edx |
| ; convert number in eax to decimal UNICODE string |
| push edi |
| push ecx |
| push -'0' |
| mov ecx, 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 ecx |
| 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 [image_of_eax], eax |
| mov [image_of_ebx], ebx |
| ret |
| ; directory / |
| .rootdir: |
| cmp dword [ebx], 1 ; read folder? |
| jz .readroot |
| .access_denied: |
| mov dword [image_of_eax], 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_static |
| 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], ebx ; 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_static: |
| mov esi, fs_additional_handlers-8 |
| sub esp, 16 |
| .readroot_ah_loop: |
| add esi, 8 |
| cmp dword [esi], 0 |
| jz .readroot_done |
| xor eax, eax |
| .readroot_ah_loop2: |
| push edi |
| lea edi, [esp+4] |
| call dword [esi+4] |
| pop edi |
| test eax, eax |
| jz .readroot_ah_loop |
| inc dword [edx+8] |
| dec dword [esp+16] |
| jns .readroot_ah_loop2 |
| dec ebp |
| js .readroot_ah_loop2 |
| push eax |
| xor eax, eax |
| inc dword [edx+4] |
| mov dword [edi], 0x10 ; attributes: folder |
| mov dword [edi+4], ebx |
| add edi, 8 |
| mov ecx, 40/4-2 |
| rep stosd |
| push esi edi |
| lea esi, [esp+12] |
| @@: |
| lodsb |
| stosb |
| test bl, 1 |
| jz .ansi3 |
| mov byte [edi], 0 |
| inc edi |
| .ansi3: |
| test al, al |
| jnz @b |
| pop edi esi eax |
| add edi, 520 |
| test bl, 1 |
| jnz .readroot_ah_loop2 |
| sub edi, 520-264 |
| jmp .readroot_ah_loop2 |
| .readroot_done: |
| add esp, 16 |
| pop eax |
| mov ebx, [edx+4] |
| xor eax, eax |
| dec ebp |
| js @f |
| mov al, ERROR_END_OF_FILE |
| @@: |
| mov [image_of_eax], eax |
| mov [image_of_ebx], ebx |
| ret |
| .notfound_try: |
| mov edi, fs_additional_handlers |
| @@: |
| cmp dword [edi], 0 |
| jz .notfound |
| call dword [edi] |
| scasd |
| scasd |
| jmp @b |
| .notfound: |
| mov dword [image_of_eax], ERROR_FILE_NOT_FOUND |
| and dword [image_of_ebx], 0 |
| ret |
| |
| .notfounda: |
| cmp edi, esp |
| jnz .notfound |
| add esp, 8 |
| jmp .notfound |
| |
| .found1: |
| pop eax |
| cmp byte [esi], 0 |
| jz .maindir |
| .found2: |
| ; 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 .notfounda |
| lea ecx, [ecx*5] |
| lea ecx, [ecx*2+eax] |
| jmp @b |
| .done1: |
| jecxz .notfounda |
| test al, al |
| jnz @f |
| dec esi |
| @@: |
| cmp byte [esi], 0 |
| jnz @f |
| test ebp, ebp |
| jz @f |
| mov esi, ebp |
| xor ebp, ebp |
| @@: |
| ; 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 |
| ; ebp = 0 or pointer to rest of name from folder addressed by esi |
| ; out: [image_of_eax]=image of eax, [image_of_ebx]=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 [image_of_eax], eax |
| mov [image_of_ebx], ebx |
| ret |
| .not_impl: |
| mov dword [image_of_eax], 2 ; not implemented |
| ret |
| |
| fs_NotImplemented: |
| mov eax, 2 |
| ret |
| |
| fs_RamdiskServices: |
| dd fs_RamdiskRead |
| dd fs_RamdiskReadFolder |
| dd fs_RamdiskRewrite |
| dd fs_RamdiskWrite |
| dd fs_RamdiskSetFileEnd |
| dd fs_RamdiskGetFileInfo |
| dd fs_RamdiskSetFileInfo |
| dd 0 |
| dd fs_RamdiskDelete |
| dd fs_RamdiskCreateFolder |
| 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 [image_of_eax], eax |
| mov [image_of_ebx], ebx |
| ret |
| |
| fs_FloppyServices: |
| dd fs_FloppyRead |
| dd fs_FloppyReadFolder |
| dd fs_FloppyRewrite |
| dd fs_FloppyWrite |
| dd fs_FloppySetFileEnd |
| dd fs_FloppyGetFileInfo |
| dd fs_FloppySetFileInfo |
| dd 0 |
| dd fs_FloppyDelete |
| dd fs_FloppyCreateFolder |
| 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 fs_OnHdAndBd.nf |
| cmp cl, [DRIVE_DATA+1+eax] |
| fs_OnHdAndBd: |
| jbe @f |
| .nf: |
| call free_hd_channel |
| and [hd1_status], 0 |
| mov dword [image_of_eax], 5 ; not found |
| ret |
| @@: |
| mov [known_part], ecx ; 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 [image_of_eax], eax |
| mov [image_of_ebx], ebx |
| ret |
| .not_impl: |
| call free_hd_channel |
| and [hd1_status], 0 |
| mov dword [image_of_eax], 2 ; not implemented |
| ret |
| |
| fs_HdServices: |
| dd fs_HdRead |
| dd fs_HdReadFolder |
| dd fs_HdRewrite |
| dd fs_HdWrite |
| dd fs_HdSetFileEnd |
| dd fs_HdGetFileInfo |
| dd fs_HdSetFileInfo |
| dd 0 |
| dd fs_HdDelete |
| dd fs_HdCreateFolder |
| fs_NumHdServices = ($ - fs_HdServices)/4 |
| |
| ;******************************************************* |
| fs_OnCd0: |
| call reserve_cd |
| mov [ChannelNumber],1 |
| mov [DiskNumber],0 |
| push 6 |
| push 1 |
| jmp fs_OnCd |
| fs_OnCd1: |
| call reserve_cd |
| mov [ChannelNumber],1 |
| mov [DiskNumber],1 |
| push 4 |
| push 2 |
| jmp fs_OnCd |
| fs_OnCd2: |
| call reserve_cd |
| mov [ChannelNumber],2 |
| mov [DiskNumber],0 |
| push 2 |
| push 3 |
| jmp fs_OnCd |
| fs_OnCd3: |
| call reserve_cd |
| mov [ChannelNumber],2 |
| mov [DiskNumber],1 |
| push 0 |
| push 4 |
| fs_OnCd: |
| call reserve_cd_channel |
| pop eax |
| mov [cdpos], eax |
| pop eax |
| cmp ecx, 0x100 |
| jae .nf |
| push ecx ebx |
| mov cl,al |
| mov bl,[DRIVE_DATA+1] |
| shr bl,cl |
| test bl,2 |
| pop ebx ecx |
| |
| jnz @f |
| .nf: |
| call free_cd_channel |
| and [cd_status], 0 |
| mov dword [image_of_eax], 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 [image_of_eax], eax |
| mov [image_of_ebx], ebx |
| ret |
| .not_impl: |
| call free_cd_channel |
| and [cd_status], 0 |
| mov dword [image_of_eax], 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 0 |
| dd fs_NotImplemented |
| dd fs_NotImplemented |
| fs_NumCdServices = ($ - fs_CdServices)/4 |
| |
| ;******************************************************* |
| |
| fs_HasRamdisk: |
| mov al, 1 ; we always have ramdisk |
| ret |
| |
| fs_HasFloppy: |
| cmp byte [DRIVE_DATA], 0 |
| setnz al |
| ret |
| |
| fs_HasHd0: |
| mov al, [DRIVE_DATA+1] |
| and al, 11000000b |
| cmp al, 01000000b |
| setz al |
| ret |
| fs_HasHd1: |
| mov al, [DRIVE_DATA+1] |
| and al, 00110000b |
| cmp al, 00010000b |
| setz al |
| ret |
| fs_HasHd2: |
| mov al, [DRIVE_DATA+1] |
| and al, 00001100b |
| cmp al, 00000100b |
| setz al |
| ret |
| fs_HasHd3: |
| mov al, [DRIVE_DATA+1] |
| and al, 00000011b |
| cmp al, 00000001b |
| setz al |
| ret |
| |
| ;******************************************************* |
| fs_HasCd0: |
| mov al, [DRIVE_DATA+1] |
| and al, 11000000b |
| cmp al, 10000000b |
| setz al |
| ret |
| fs_HasCd1: |
| mov al, [DRIVE_DATA+1] |
| and al, 00110000b |
| cmp al, 00100000b |
| setz al |
| ret |
| fs_HasCd2: |
| mov al, [DRIVE_DATA+1] |
| and al, 00001100b |
| cmp al, 00001000b |
| setz al |
| ret |
| fs_HasCd3: |
| mov al, [DRIVE_DATA+1] |
| 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 (([DRIVE_DATA] and 0xF0) != 0) and /fd/2 iff (([DRIVE_DATA] and 0x0F) != 0) |
| test byte [DRIVE_DATA], 0xF0 |
| jz .no1 |
| test eax, eax |
| jnz .no1 |
| inc eax |
| ret ; CF cleared |
| .no1: |
| test byte [DRIVE_DATA], 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 [DRIVE_DATA+2+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 |
| ;******************************************************* |
| |
| ; Additional FS handlers. |
| ; This handler gets the control each time when fn 70 is called |
| ; with unknown item of root subdirectory. |
| ; in: esi -> name |
| ; ebp = 0 or rest of name relative to esi |
| ; out: if the handler processes path, he must not return in file_system_lfn, |
| ; but instead pop return address and return directly to the caller |
| ; otherwise simply return |
| |
| ; here we test for /bd<N>/... - BIOS disks |
| biosdisk_handler: |
| cmp [NumBiosDisks], 0 |
| jz .ret |
| mov al, [esi] |
| or al, 20h |
| cmp al, 'b' |
| jnz .ret |
| mov al, [esi+1] |
| or al, 20h |
| cmp al, 'd' |
| jnz .ret |
| push esi |
| inc esi |
| inc esi |
| cmp byte [esi], '0' |
| jb .ret2 |
| cmp byte [esi], '9' |
| ja .ret2 |
| xor edx, edx |
| @@: |
| lodsb |
| test al, al |
| jz .ok |
| cmp al, '/' |
| jz .ok |
| sub al, '0' |
| cmp al, 9 |
| ja .ret2 |
| lea edx, [edx*5] |
| lea edx, [edx*2+eax] |
| jmp @b |
| .ret2: |
| pop esi |
| .ret: |
| ret |
| .ok: |
| cmp al, '/' |
| jz @f |
| dec esi |
| @@: |
| add dl, 80h |
| xor ecx, ecx |
| @@: |
| cmp dl, [BiosDisksData+ecx*4] |
| jz .ok2 |
| inc ecx |
| cmp ecx, [NumBiosDisks] |
| jb @b |
| jmp .ret2 |
| .ok2: |
| add esp, 8 |
| test al, al |
| jnz @f |
| mov esi, fs_BdNext |
| jmp file_system_lfn.maindir_noesi |
| @@: |
| push ecx |
| push fs_OnBd |
| mov edi, esp |
| jmp file_system_lfn.found2 |
| |
| fs_BdNext: |
| cmp eax, [BiosDiskPartitions+ecx*4] |
| inc eax |
| cmc |
| ret |
| |
| fs_OnBd: |
| pop edx edx |
| ; edx = disk number, ecx = partition number |
| ; esi+ebp = name |
| call reserve_hd1 |
| add edx, 0x80 |
| mov [hdpos], edx |
| cmp ecx, [BiosDiskPartitions+(edx-0x80)*4] |
| jmp fs_OnHdAndBd |
| |
| ; This handler is called when virtual root is enumerated |
| ; and must return all items which can be handled by this. |
| ; It is called several times, first time with eax=0 |
| ; in: eax = 0 for first call, previously returned value for subsequent calls |
| ; out: eax = 0 => no more items |
| ; eax != 0 => buffer pointed to by edi contains name of item |
| |
| ; here we enumerate existing BIOS disks /bd<N> |
| biosdisk_enum_root: |
| cmp eax, [NumBiosDisks] |
| jae .end |
| push eax |
| movzx eax, byte [BiosDisksData+eax*4] |
| sub al, 80h |
| push eax |
| mov al, 'b' |
| stosb |
| mov al, 'd' |
| stosb |
| pop eax |
| cmp al, 10 |
| jae .big |
| add al, '0' |
| stosb |
| mov byte [edi], 0 |
| pop eax |
| inc eax |
| ret |
| .end: |
| xor eax, eax |
| ret |
| .big: |
| push ecx edx |
| push -'0' |
| mov ecx, 10 |
| @@: |
| xor edx, edx |
| div ecx |
| push edx |
| test eax, eax |
| jnz @b |
| xchg eax, edx |
| @@: |
| pop eax |
| add al, '0' |
| stosb |
| jnz @b |
| pop edx ecx |
| pop eax |
| inc eax |
| ret |
| |
| process_replace_file_name: |
| mov ebp, [full_file_name_table] |
| mov edi, [full_file_name_table.size] |
| dec edi |
| shl edi, 7 |
| add edi, ebp |
| .loop: |
| cmp edi, ebp |
| jb .notfound |
| push esi edi |
| @@: |
| cmp byte [edi], 0 |
| jz .dest_done |
| lodsb |
| test al, al |
| jz .cont |
| or al, 20h |
| scasb |
| jz @b |
| jmp .cont |
| .dest_done: |
| cmp byte [esi], 0 |
| jz .found |
| cmp byte [esi], '/' |
| jnz .cont |
| inc esi |
| jmp .found |
| .cont: |
| pop edi esi |
| sub edi, 128 |
| jmp .loop |
| .found: |
| pop edi eax |
| mov ebp, esi |
| cmp byte [esi], 0 |
| lea esi, [edi+64] |
| jnz .ret |
| .notfound: |
| xor ebp, ebp |
| .ret: |
| ret |
| |
| sys_current_directory: |
| ; mov esi, [current_slot] |
| ; mov esi, [esi+APPDATA.cur_dir] |
| ; mov edx, esi |
| |
| ;get length string of appdata.cur_dir |
| mov eax, [current_slot] |
| mov edi, [eax+APPDATA.cur_dir] |
| |
| dec ebx |
| jz .set |
| dec ebx |
| jz .get |
| ret |
| .get: |
| ; sysfunction 30.2: [for app] eax=30,ebx=2,ecx->buffer,edx=len |
| ; for our code: ebx->buffer,ecx=len |
| max_cur_dir equ 0x1000 |
| |
| mov ebx,edi |
| |
| push ecx |
| push edi |
| |
| xor eax,eax |
| mov ecx,max_cur_dir |
| |
| repne scasb ;find zerro at and string |
| jnz .error ; no zero in cur_dir: internal error, should not happen |
| |
| sub edi,ebx ;lenght for copy |
| inc edi |
| mov [esp+32+8],edi ;return in eax |
| |
| cmp edx, edi |
| jbe @f |
| mov edx, edi |
| @@: |
| ;source string |
| pop esi |
| ;destination string |
| pop edi |
| cmp edx, 1 |
| jbe .ret |
| |
| mov al,'/' ;start string with '/' |
| stosb |
| mov ecx,edx |
| rep movsb ;copy string |
| .ret: ret |
| |
| .error: add esp,8 |
| or dword [esp+32],-1 ;error not found zerro at string ->[eax+APPDATA.cur_dir] |
| ret |
| .set: |
| ; sysfunction 30.1: [for app] eax=30,ebx=1,ecx->string |
| ; for our code: ebx->string to set |
| ; use generic resolver with APPDATA.cur_dir as destination |
| push max_cur_dir ;0x1000 |
| push edi ;destination |
| mov ebx,ecx |
| call get_full_file_name |
| ret |
| |
| ; in: ebx = file name, [esp+4] = destination, [esp+8] = sizeof destination |
| ; destroys all registers except ebp,esp |
| get_full_file_name: |
| push ebp |
| mov esi, [current_slot] |
| mov esi, [esi+APPDATA.cur_dir] |
| mov edx, esi |
| @@: |
| inc esi |
| cmp byte [esi-1], 0 |
| jnz @b |
| dec esi |
| cmp byte [ebx], '/' |
| jz .set_absolute |
| ; string gives relative path |
| mov edi, [esp+8] ; destination |
| .relative: |
| cmp byte [ebx], 0 |
| jz .set_ok |
| cmp word [ebx], '.' |
| jz .set_ok |
| cmp word [ebx], './' |
| jnz @f |
| add ebx, 2 |
| jmp .relative |
| @@: |
| cmp word [ebx], '..' |
| jnz .doset_relative |
| cmp byte [ebx+2], 0 |
| jz @f |
| cmp byte [ebx+2], '/' |
| jnz .doset_relative |
| @@: |
| dec esi |
| cmp byte [esi], '/' |
| jnz @b |
| add ebx, 3 |
| jmp .relative |
| .set_ok: |
| cmp edx, edi ; is destination equal to APPDATA.cur_dir? |
| jz .set_ok.cur_dir |
| sub esi, edx |
| cmp esi, [esp+12] |
| jb .set_ok.copy |
| .fail: |
| mov byte [edi], 0 |
| xor eax, eax ; fail |
| pop ebp |
| ret 8 |
| .set_ok.copy: |
| mov ecx, esi |
| mov esi, edx |
| rep movsb |
| mov byte [edi], 0 |
| .ret.ok: |
| mov al, 1 ; ok |
| pop ebp |
| ret 8 |
| .set_ok.cur_dir: |
| mov byte [esi], 0 |
| jmp .ret.ok |
| .doset_relative: |
| cmp edx, edi |
| jz .doset_relative.cur_dir |
| sub esi, edx |
| cmp esi, [esp+12] |
| jae .fail |
| mov ecx, esi |
| mov esi, edx |
| mov edx, edi |
| rep movsb |
| jmp .doset_relative.copy |
| .doset_relative.cur_dir: |
| mov edi, esi |
| .doset_relative.copy: |
| add edx, [esp+12] |
| mov byte [edi], '/' |
| inc edi |
| cmp edi, edx |
| jae .overflow |
| @@: |
| mov al, [ebx] |
| inc ebx |
| stosb |
| test al, al |
| jz .ret.ok |
| cmp edi, edx |
| jb @b |
| .overflow: |
| dec edi |
| jmp .fail |
| .set_absolute: |
| lea esi, [ebx+1] |
| call process_replace_file_name |
| mov edi, [esp+8] |
| mov edx, [esp+12] |
| add edx, edi |
| .set_copy: |
| lodsb |
| stosb |
| test al, al |
| jz .set_part2 |
| .set_copy_cont: |
| cmp edi, edx |
| jb .set_copy |
| jmp .overflow |
| .set_part2: |
| mov esi, ebp |
| xor ebp, ebp |
| test esi, esi |
| jz .ret.ok |
| mov byte [edi-1], '/' |
| jmp .set_copy_cont |
| Property changes: |
|---|
| Added: svn:keywords |
|---|
| +Rev |
|---|
| \ No newline at end of property |
|---|