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kolibrios/kernel/branches/kolibri-ahci/fs/iso9660.inc
Rustem Gimadutdinov (rgimad) 73864ff1d7 Create kolibri-ahci branch 
git-svn-id: svn://kolibrios.org@9019 a494cfbc-eb01-0410-851d-a64ba20cac60
2021-07-07 21:36:03 +00:00

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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2016. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License. ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
$Revision$
; CD external functions
; in:
; esi -> path string in UTF-8
; ebx -> parameter structure +4
; ecx = bytes to read
; edx -> buffer
; out:
; eax, ebx = return values for sysfunc 70
iglobal
align 4
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
endg
uglobal
align 4
cd_current_pointer_of_input dd 0
cd_current_pointer_of_input_2 dd 0
cd_mem_location dd 0
cd_counter_block dd 0
cd_status dd 0
endg
;-----------------------------------------------------------------------------
fs_NotImplemented:
movi eax, ERROR_UNSUPPORTED_FS
ret
;-----------------------------------------------------------------------------
reserve_cd:
cli
cmp [cd_status], 0
je reserve_ok2
sti
call change_task
jmp reserve_cd
;-----------------------------------------------------------------------------
reserve_ok2:
push eax
mov eax, [current_slot_idx]
shl eax, 5
mov eax, [eax+TASK_TABLE+TASKDATA.pid]
mov [cd_status], eax
pop eax
sti
ret
;-----------------------------------------------------------------------------
reserve_cd_channel:
pushad
mov eax, [cdpos]
dec eax
shr eax, 2
test eax, eax
jnz .1
cmp [ChannelNumber], 1
jne @f
mov ecx, ide_channel1_mutex
jmp .mutex_lock
;--------------------------------------
@@:
mov ecx, ide_channel2_mutex
jmp .mutex_lock
;--------------------------------------
.1:
dec eax
jnz .2
cmp [ChannelNumber], 1
jne @f
mov ecx, ide_channel3_mutex
jmp .mutex_lock
;--------------------------------------
@@:
mov ecx, ide_channel4_mutex
jmp .mutex_lock
;--------------------------------------
.2:
cmp [ChannelNumber], 1
jne @f
mov ecx, ide_channel5_mutex
jmp .mutex_lock
;--------------------------------------
@@:
mov ecx, ide_channel6_mutex
.mutex_lock:
call mutex_lock
popad
ret
;-----------------------------------------------------------------------------
free_cd_channel:
pushad
mov eax, [cdpos]
dec eax
shr eax, 2
test eax, eax
jnz .1
cmp [ChannelNumber], 1
jne @f
mov ecx, ide_channel1_mutex
jmp .mutex_unlock
;--------------------------------------
@@:
mov ecx, ide_channel2_mutex
jmp .mutex_unlock
;--------------------------------------
.1:
dec eax
jnz .2
cmp [ChannelNumber], 1
jne @f
mov ecx, ide_channel3_mutex
jmp .mutex_unlock
;--------------------------------------
@@:
mov ecx, ide_channel4_mutex
jmp .mutex_unlock
;--------------------------------------
.2:
cmp [ChannelNumber], 1
jne @f
mov ecx, ide_channel5_mutex
jmp .mutex_unlock
;--------------------------------------
@@:
mov ecx, ide_channel6_mutex
.mutex_unlock:
call mutex_unlock
popad
ret
;-----------------------------------------------------------------------------
fs_CdRead:
call cd_find_lfn
jc .notFound
mov edi, [cd_current_pointer_of_input]
test byte [edi+25], 10b ; do not allow read directories
jnz .noaccess
test ebx, ebx
jz .l1
cmp dword [ebx+4], 0
jz @f
xor ebx, ebx
movi eax, ERROR_END_OF_FILE
ret
.notFound:
cmp [DevErrorCode], 0
jne .noaccess
xor ebx, ebx
movi eax, ERROR_FILE_NOT_FOUND
ret
.noaccess_3:
pop eax edx ecx
.noaccess:
xor ebx, ebx
movi eax, ERROR_ACCESS_DENIED
ret
@@:
mov ebx, [ebx]
.l1:
push ecx edx 0
mov eax, [edi+10] ; real size of the file section
sub eax, ebx
jb .eof
cmp eax, ecx
jae @f
mov ecx, eax
pop eax
push ERROR_END_OF_FILE
@@:
mov eax, [edi+2]
mov [CDSectorAddress], eax
; now eax=cluster, ebx=position, ecx=count, edx=buffer for data
.new_sector:
test ecx, ecx
jz .done
sub ebx, 2048
jae .next
add ebx, 2048
jnz .incomplete_sector
cmp ecx, 2048
jb .incomplete_sector
; we may read and memmove complete sector
mov [CDDataBuf_pointer], edx
call ReadCDWRetr
cmp [DevErrorCode], 0
jne .noaccess_3
add edx, 2048
sub ecx, 2048
.next:
inc dword [CDSectorAddress]
jmp .new_sector
.eof:
pop eax
push ERROR_END_OF_FILE
.done:
mov ebx, edx
pop eax edx ecx
sub ebx, edx
ret
.incomplete_sector: ; we must read and memmove incomplete sector
mov [CDDataBuf_pointer], CDDataBuf
call ReadCDWRetr
cmp [DevErrorCode], 0
jne .noaccess_3
push ecx
add ecx, ebx
cmp ecx, 2048
jbe @f
mov ecx, 2048
@@:
sub ecx, ebx
push edi esi ecx
mov edi, edx
lea esi, [CDDataBuf + ebx]
cld
rep movsb
pop ecx esi edi
add edx, ecx
sub [esp], ecx
pop ecx
xor ebx, ebx
jmp .next
;-----------------------------------------------------------------------------
fs_CdReadFolder:
push edi
call cd_find_lfn
jnc .found
pop edi
cmp [DevErrorCode], 0
jne .noaccess_1
xor ebx, ebx
mov eax, ERROR_FILE_NOT_FOUND
ret
.found:
mov edi, [cd_current_pointer_of_input]
test byte [edi+25], 10b ; do not allow read directories
jnz .found_dir
pop edi
.noaccess_1:
xor ebx, ebx
mov eax, ERROR_ACCESS_DENIED
ret
.end_buffer:
pop edx eax
sub eax, 2048 ; directory is over?
ja .read_to_buffer
mov eax, [cd_counter_block]
mov [edx+8], eax
mov eax, [ebx]
sub [edx+4], eax
xor eax, eax
dec ecx
js @f
mov al, ERROR_END_OF_FILE
@@:
pop ecx edi
mov ebx, [edx+4]
ret
.found_dir:
mov eax, [edi+2] ; eax=cluster
mov [CDSectorAddress], eax
mov eax, [edi+10] ; directory size
push eax ecx
mov edi, edx
mov ecx, 32/4
xor eax, eax
rep stosd
pop ecx eax
mov byte [edx], 1 ; version
mov [cd_mem_location], edx
add [cd_mem_location], 32
mov [cd_counter_block], dword 0
dec dword [CDSectorAddress]
push ecx
.read_to_buffer:
inc dword [CDSectorAddress]
mov [CDDataBuf_pointer], CDDataBuf
call ReadCDWRetr ; read sector of directory
cmp [DevErrorCode], 0
jne .noaccess_1
mov [cd_current_pointer_of_input_2], CDDataBuf
push eax edx
.get_names_from_buffer:
call cd_get_name
jc .end_buffer
inc dword [cd_counter_block]
mov eax, [cd_counter_block]
cmp [ebx], eax
jae .get_names_from_buffer
test ecx, ecx
jz .get_names_from_buffer
mov edi, [cd_counter_block]
mov [edx+4], edi
dec ecx
mov esi, ebp
call cd_get_parameters_of_file
add edi, 40
mov ax, '.'
cmp dword[ebx+4], 2
jz .utf16
cmp dword[ebx+4], 3
jz .utf8
cmp [cd_counter_block], 2
jbe .parentDirectory
@@:
lodsw
xchg ah, al
call uni2ansi_char
stosb
call .checkForEnd
jc @b
@@:
mov [edi], byte 0
add [cd_mem_location], 304
jmp .get_names_from_buffer
.parentDirectory:
stosb
cmp [cd_counter_block], 2
jnz @b
stosb
jmp @b
.utf8:
add [cd_mem_location], 256
cmp [cd_counter_block], 2
jbe .parentDirectory
push ecx
mov ecx, 519
@@:
lodsw
xchg ah, al
call UTF16to8
js @f
call .checkForEnd
jc @b
@@:
pop ecx
mov [edi], byte 0
add [cd_mem_location], 304
jmp .get_names_from_buffer
.checkForEnd:
mov ax, [esi]
cmp ax, 3B00h ; ';'
jz @f
; check for files not ending with separator
movzx eax, byte [ebp-33]
add eax, ebp
sub eax, 34
cmp esi, eax
jz @f
; check the end of the directory
movzx eax, byte [ebp-1]
add eax, ebp
cmp esi, eax
@@:
ret
.utf16:
cmp [cd_counter_block], 2
jbe .utf16ParentDirectory
@@:
lodsw
xchg ah, al
stosw
call .checkForEnd
jc @b
@@:
mov [edi], word 0
add [cd_mem_location], 560
jmp .get_names_from_buffer
.utf16ParentDirectory:
stosw
cmp [cd_counter_block], 2
jnz @b
stosw
jmp @b
cd_get_parameters_of_file:
mov edi, [cd_mem_location]
cd_get_parameters_of_file_1:
; get file attributes
xor eax, eax
; file is not archived
inc eax
shl eax, 1
; is a directory?
test [ebp-8], byte 2
jz .file
inc eax
.file:
; not as a volume label in the FAT, in this form not available
; file is not a system
shl eax, 3
; file is hidden? (attribute of existence)
test [ebp-8], byte 1
jz .hidden
inc eax
.hidden:
shl eax, 1
; file is always read-only, as this CD
inc eax
mov [edi], eax
mov eax, [ebx+4]
mov [edi+4], eax
; get the time to file
; hour
movzx eax, byte [ebp-12]
shl eax, 8
; minute
mov al, [ebp-11]
shl eax, 8
; second
mov al, [ebp-10]
; file creation time
mov [edi+8], eax
; last access time
mov [edi+16], eax
; last write time
mov [edi+24], eax
; get date for file
; year
movzx eax, byte [ebp-15]
add eax, 1900
shl eax, 8
; month
mov al, [ebp-14]
shl eax, 8
; day
mov al, [ebp-13]
; file creation date
mov [edi+12], eax
; last access date
mov [edi+20], eax
; last write date
mov [edi+28], eax
; get the file size in bytes
xor eax, eax
mov [edi+32+4], eax
mov eax, [ebp-23]
mov [edi+32], eax
ret
;-----------------------------------------------------------------------------
fs_CdGetFileInfo:
call cd_find_lfn
movi eax, ERROR_FILE_NOT_FOUND
jc @f
mov edi, edx
mov eax, [ebx+4]
mov [edx+4], eax
cmp byte [esi], 0
jz .volume
mov ebp, [cd_current_pointer_of_input]
add ebp, 33
call cd_get_parameters_of_file_1
xor eax, eax
@@:
ret
.volume:
test eax, eax
jz .size
mov ecx, 16
mov esi, CDDataBuf+40
add edi, 40
cmp eax, 2
jz .utf16
cmp eax, 3
jz .utf8
@@:
lodsw
xchg al, ah
call uni2ansi_char
stosb
loop @b
jmp .size
.utf16:
lodsw
xchg al, ah
stosw
loop .utf16
jmp .size
.utf8:
mov ebx, ecx
shl ecx, 1
@@:
lodsw
xchg ah, al
call UTF16to8
dec ebx
jnz @b
.size:
mov eax, [CDDataBuf+80]
shl eax, 11
mov [edx+32], eax
xor eax, eax
mov [edx+36], eax
stosw
mov byte [edx], 8
ret
;-----------------------------------------------------------------------------
cd_find_lfn:
mov [cd_appl_data], 0
; in: esi -> path string in UTF-8
; out: [cd_current_pointer_of_input] -> direntry, CF=1 -> file not found
push eax esi
; Sector 16 - start set of volume descriptors
call WaitUnitReady
cmp [DevErrorCode], 0
jne .access_denied
call prevent_medium_removal
; testing of reading
mov [CDSectorAddress], dword 16
mov [CDDataBuf_pointer], CDDataBuf
call ReadCDWRetr;_1
cmp [DevErrorCode], 0
jne .access_denied
; calculation of the last session
call WaitUnitReady
cmp [DevErrorCode], 0
jne .access_denied
call Read_TOC
mov ah, [CDDataBuf+4+4]
mov al, [CDDataBuf+4+5]
shl eax, 16
mov ah, [CDDataBuf+4+6]
mov al, [CDDataBuf+4+7]
add eax, 15
mov [CDSectorAddress], eax
; mov [CDSectorAddress],dword 15
mov [CDDataBuf_pointer], CDDataBuf
;--------------------------------------
.start:
inc dword [CDSectorAddress]
call ReadCDWRetr;_1
cmp [DevErrorCode], 0
jne .access_denied
.start_check:
; checking for "lice"
cmp [CDDataBuf+1], dword 'CD00'
jne .access_denied
cmp [CDDataBuf+5], byte '1'
jne .access_denied
; sector is the terminator of set of descriptors volumes?
cmp [CDDataBuf], byte 0xff
je .access_denied
; sector is an additional and improved descriptor of volume?
cmp [CDDataBuf], byte 0x2
jne .start
; sector is an additional descriptor of volume?
cmp [CDDataBuf+6], byte 0x1
jne .start
; parameters of root directory
mov eax, [CDDataBuf+0x9c+2]; start of root directory
mov [CDSectorAddress], eax
mov eax, [CDDataBuf+0x9c+10]; size of root directory
cmp byte [esi], 0
jnz @f
mov [cd_current_pointer_of_input], CDDataBuf+0x9c
jmp .done
;--------------------------------------
@@:
; start the search
.mainloop:
dec dword [CDSectorAddress]
;--------------------------------------
.read_to_buffer:
inc dword [CDSectorAddress]
mov [CDDataBuf_pointer], CDDataBuf
call ReadCDWRetr ; read sector of directory
cmp [DevErrorCode], 0
jne .access_denied
call cd_find_name_in_buffer
jnc .found
sub eax, 2048
; directory is over?
cmp eax, 0
ja .read_to_buffer
; desired element of chain is not found
.access_denied:
pop esi eax
mov [cd_appl_data], 1
stc
ret
;--------------------------------------
; desired element of chain found
.found:
; the end of the file path
cmp byte [esi-1], 0
jz .done
mov eax, [cd_current_pointer_of_input]
push dword [eax+2]
pop dword [CDSectorAddress] ; beginning of the directory
mov eax, [eax+2+8] ; size of directory
jmp .mainloop
;--------------------------------------
; file pointer found
.done:
pop esi eax
mov [cd_appl_data], 1
clc
ret
;-----------------------------------------------------------------------------
cd_find_name_in_buffer:
mov [cd_current_pointer_of_input_2], CDDataBuf
;--------------------------------------
.start:
call cd_get_name
jc .not_found
call cd_compare_name
jc .start
;--------------------------------------
.found:
clc
ret
;--------------------------------------
.not_found:
stc
ret
;-----------------------------------------------------------------------------
cd_get_name:
push eax
mov ebp, [cd_current_pointer_of_input_2]
mov [cd_current_pointer_of_input], ebp
mov eax, [ebp]
test eax, eax ; entry's is over?
jz .next_sector
cmp ebp, CDDataBuf+2048 ; buffer is over?
jae .next_sector
movzx eax, byte [ebp]
add [cd_current_pointer_of_input_2], eax ; next entry of directory
add ebp, 33; pointer is set to the beginning of the name
pop eax
clc
ret
;--------------------------------------
.next_sector:
pop eax
stc
ret
;-----------------------------------------------------------------------------
cd_compare_name:
; in: esi -> UTF-8 name, ebp -> UTF-16BE name
; out: CF=0 -> names match, esi -> next component of name
; CF=1 -> esi is not changed
push edx edi eax esi
mov edi, ebp
.loop:
call utf8to16
call utf16toUpper
mov edx, eax
mov ax, [edi]
xchg al, ah
call utf16toUpper
cmp ax, dx
jne .name_not_coincide
add edi, 2
cmp [esi], byte '/' ; path separator is end of current element
je .done
cmp [esi], byte 0 ; path separator end of name
jne .loop
.done:
; check end of file
cmp [edi], word 3B00h; separator end of file ';'
je .done_1
; check for files not ending with separator
movzx eax, byte [ebp-33]
add eax, ebp
sub eax, 34
cmp edi, eax
je .done_1
; check the end of directory
movzx eax, byte [ebp-1]
add eax, ebp
cmp edi, eax
jne .name_not_coincide
.done_1:
pop eax eax edi edx
inc esi
ret
.name_not_coincide:
pop esi eax edi edx
stc
ret
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