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kolibrios/kernel/branches/kolibri-process/fs/iso9660.inc
Sergey Semyonov (Serge) 2518ed40a1 kolibri-process: 
1)update
2)create v86 process


git-svn-id: svn://kolibrios.org@4923 a494cfbc-eb01-0410-851d-a64ba20cac60
2014-05-12 19:41:55 +00:00

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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2011. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
$Revision: 4700 $
;-----------------------------------------------------------------------------
uglobal
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
endg
;-----------------------------------------------------------------------------
reserve_cd:
cli
cmp [cd_status], 0
je reserve_ok2
sti
call change_task
jmp reserve_cd
;-----------------------------------------------------------------------------
reserve_ok2:
push eax
mov eax, [CURRENT_TASK]
shl eax, 5
mov eax, [eax+CURRENT_TASK+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
;-----------------------------------------------------------------------------
uglobal
cd_status dd 0
endg
;-----------------------------------------------------------------------------
;
; fs_CdRead - LFN variant for reading CD disk
;
; esi points to filename /dir1/dir2/.../dirn/file,0
; ebx pointer to 64-bit number = first wanted byte, 0+
; may be ebx=0 - start from first byte
; ecx number of bytes to read, 0+
; edx mem location to return data
;
; ret ebx = bytes read or 0xffffffff file not found
; eax = 0 ok read or other = errormsg
;
;-----------------------------------------------------------------------------
fs_CdRead:
push edi
cmp byte [esi], 0
jnz @f
;--------------------------------------
.noaccess:
pop edi
;--------------------------------------
.noaccess_2:
or ebx, -1
mov eax, ERROR_ACCESS_DENIED
ret
;--------------------------------------
.noaccess_3:
pop eax edx ecx edi
jmp .noaccess_2
;--------------------------------------
@@:
call cd_find_lfn
jnc .found
pop edi
cmp [DevErrorCode], 0
jne .noaccess_2
or ebx, -1
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 .noaccess
test ebx, ebx
jz .l1
cmp dword [ebx+4], 0
jz @f
xor ebx, ebx
;--------------------------------------
.reteof:
mov eax, 6; end of file
pop edi
ret
;--------------------------------------
@@:
mov ebx, [ebx]
;--------------------------------------
.l1:
push ecx edx
push 0
mov eax, [edi+10] ; real size of the file section
sub eax, ebx
jb .eof
cmp eax, ecx
jae @f
mov ecx, eax
mov byte [esp], 6
;--------------------------------------
@@:
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 ; read sector of file
cmp [DevErrorCode], 0
jne .noaccess_3
add edx, 2048
sub ecx, 2048
;--------------------------------------
.next:
inc dword [CDSectorAddress]
jmp .new_sector
;--------------------------------------
.incomplete_sector:
; we must read and memmove incomplete sector
mov [CDDataBuf_pointer], CDDataBuf
call ReadCDWRetr ; read sector of file
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
;--------------------------------------
.done:
mov ebx, edx
pop eax edx ecx edi
sub ebx, edx
ret
;--------------------------------------
.eof:
mov ebx, edx
pop eax edx ecx
sub ebx, edx
jmp .reteof
;-----------------------------------------------------------------------------
;
; fs_CdReadFolder - LFN variant for reading CD disk folder
;
; esi points to filename /dir1/dir2/.../dirn/file,0
; ebx pointer to structure 32-bit number = first wanted block, 0+
; & flags (bitfields)
; flags: bit 0: 0=ANSI names, 1=UNICODE names
; ecx number of blocks to read, 0+
; edx mem location to return data
;
; ret ebx = blocks read or 0xffffffff folder not found
; eax = 0 ok read or other = errormsg
;
;-----------------------------------------------------------------------------
fs_CdReadFolder:
push edi
call cd_find_lfn
jnc .found
pop edi
cmp [DevErrorCode], 0
jne .noaccess_1
or ebx, -1
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:
or ebx, -1
mov eax, ERROR_ACCESS_DENIED
ret
;--------------------------------------
.found_dir:
mov eax, [edi+2] ; eax=cluster
mov [CDSectorAddress], eax
mov eax, [edi+10] ; directory size
;--------------------------------------
.doit:
; init header
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
;.mainloop:
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
call .get_names_from_buffer
sub eax, 2048
; directory is over?
ja .read_to_buffer
mov edi, [cd_counter_block]
mov [edx+8], edi
mov edi, [ebx]
sub [edx+4], edi
xor eax, eax
dec ecx
js @f
mov al, ERROR_END_OF_FILE
;--------------------------------------
@@:
pop ecx edi
mov ebx, [edx+4]
ret
;--------------------------------------
.get_names_from_buffer:
mov [cd_current_pointer_of_input_2], CDDataBuf
push eax esi edi edx
;--------------------------------------
.get_names_from_buffer_1:
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_1
test ecx, ecx
jz .get_names_from_buffer_1
mov edi, [cd_counter_block]
mov [edx+4], edi
dec ecx
mov esi, ebp
mov edi, [cd_mem_location]
add edi, 40
test dword [ebx+4], 1; 0=ANSI, 1=UNICODE
jnz .unicode
;--------------------------------------
.ansi:
cmp [cd_counter_block], 2
jbe .ansi_parent_directory
cld
lodsw
xchg ah, al
call uni2ansi_char
cld
stosb
; check end of file
mov ax, [esi]
cmp ax, word 3B00h ; separator end of file ';'
je .cd_get_parameters_of_file_1
; check for files not ending with separator
movzx eax, byte [ebp-33]
add eax, ebp
sub eax, 34
cmp esi, eax
je .cd_get_parameters_of_file_1
; check the end of the directory
movzx eax, byte [ebp-1]
add eax, ebp
cmp esi, eax
jb .ansi
;--------------------------------------
.cd_get_parameters_of_file_1:
mov [edi], byte 0
call cd_get_parameters_of_file
add [cd_mem_location], 304
jmp .get_names_from_buffer_1
;--------------------------------------
.ansi_parent_directory:
cmp [cd_counter_block], 2
je @f
mov [edi], byte '.'
inc edi
jmp .cd_get_parameters_of_file_1
;--------------------------------------
@@:
mov [edi], word '..'
add edi, 2
jmp .cd_get_parameters_of_file_1
;--------------------------------------
.unicode:
cmp [cd_counter_block], 2
jbe .unicode_parent_directory
cld
movsw
; check end of file
mov ax, [esi]
cmp ax, word 3B00h; separator end of file ';'
je .cd_get_parameters_of_file_2
; check for files not ending with separator
movzx eax, byte [ebp-33]
add eax, ebp
sub eax, 34
cmp esi, eax
je .cd_get_parameters_of_file_2
; check the end of the directory
movzx eax, byte [ebp-1]
add eax, ebp
cmp esi, eax
jb .unicode
;--------------------------------------
.cd_get_parameters_of_file_2:
mov [edi], word 0
call cd_get_parameters_of_file
add [cd_mem_location], 560
jmp .get_names_from_buffer_1
;--------------------------------------
.unicode_parent_directory:
cmp [cd_counter_block], 2
je @f
mov [edi], word 2E00h; '.'
add edi, 2
jmp .cd_get_parameters_of_file_2
;--------------------------------------
@@:
mov [edi], dword 2E002E00h; '..'
add edi, 4
jmp .cd_get_parameters_of_file_2
;--------------------------------------
.end_buffer:
pop edx edi esi eax
ret
;-----------------------------------------------------------------------------
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
; 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 data type of name
xor eax, eax
test dword [ebx+4], 1; 0=ANSI, 1=UNICODE
jnz .unicode_1
mov [edi+4], eax
jmp @f
;--------------------------------------
.unicode_1:
inc eax
mov [edi+4], 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 - LFN variant for CD
; get file/directory attributes structure
;
;-----------------------------------------------------------------------------
fs_CdGetFileInfo:
cmp byte [esi], 0
jnz @f
mov eax, 2
ret
;--------------------------------------
@@:
push edi
call cd_find_lfn
pushfd
cmp [DevErrorCode], 0
jz @f
popfd
pop edi
mov eax, 11
ret
;--------------------------------------
@@:
popfd
jnc @f
pop edi
mov eax, ERROR_FILE_NOT_FOUND
ret
;--------------------------------------
@@:
mov edi, edx
push ebp
mov ebp, [cd_current_pointer_of_input]
add ebp, 33
call cd_get_parameters_of_file_1
pop ebp
and dword [edi+4], 0
pop edi
xor eax, eax
ret
;-----------------------------------------------------------------------------
cd_find_lfn:
mov [cd_appl_data], 0
; in: esi+ebp -> name
; out: CF=1 - file not found
; else CF=0 and [cd_current_pointer_of_input] direntry
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
push ebp
call cd_find_name_in_buffer
pop ebp
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
.nested:
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:
test ebp, ebp
jz @f
mov esi, ebp
xor ebp, ebp
jmp .nested
;--------------------------------------
@@:
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:
; compares ASCIIZ-names, case-insensitive (cp866 encoding)
; in: esi->name, ebp->name
; out: if names match: ZF=1 and esi->next component of name
; else: ZF=0, esi is not changed
; destroys eax
push esi eax edi
mov edi, ebp
;--------------------------------------
.loop:
cld
lodsb
push eax
call char_todown
call ansi2uni_char
xchg ah, al
scasw
pop eax
je .coincides
call char_toupper
call ansi2uni_char
xchg ah, al
sub edi, 2
scasw
jne .name_not_coincide
;--------------------------------------
.coincides:
cmp [esi], byte '/' ; path separator is end of current element
je .done
cmp [esi], byte 0 ; path separator end of name
je .done
jmp .loop
;--------------------------------------
.name_not_coincide:
pop edi eax esi
stc
ret
;--------------------------------------
.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 edi eax
add esp, 4
inc esi
clc
ret
;-----------------------------------------------------------------------------
char_todown:
; convert character to uppercase, using cp866 encoding
; in: al=symbol
; out: al=converted symbol
cmp al, 'A'
jb .ret
cmp al, 'Z'
jbe .az
cmp al, 0x80 ; 'А'
jb .ret
cmp al, 0x90 ; 'Р'
jb .rus1
cmp al, 0x9F ; 'Я'
ja .ret
; 0x90-0x9F -> 0xE0-0xEF
add al, 0xE0-0x90
;--------------------------------------
.ret:
ret
;--------------------------------------
.rus1:
; 0x80-0x8F -> 0xA0-0xAF
.az:
add al, 0x20
ret
;-----------------------------------------------------------------------------
uni2ansi_char:
; convert UNICODE character in al to ANSI character in ax, using cp866 encoding
; in: ax=UNICODE character
; out: al=converted ANSI character
cmp ax, 0x80
jb .ascii
cmp ax, 0x401
jz .yo1
cmp ax, 0x451
jz .yo2
cmp ax, 0x410
jb .unk
cmp ax, 0x440
jb .rus1
cmp ax, 0x450
jb .rus2
;--------------------------------------
.unk:
mov al, '_'
jmp .doit
;--------------------------------------
.yo1:
mov al, 0xF0 ; 'Ё' in cp866
jmp .doit
;--------------------------------------
.yo2:
mov al, 0xF1 ; 'ё' in cp866
jmp .doit
;--------------------------------------
.rus1:
; 0x410-0x43F -> 0x80-0xAF
add al, 0x70
jmp .doit
;--------------------------------------
.rus2:
; 0x440-0x44F -> 0xE0-0xEF
add al, 0xA0
;--------------------------------------
.ascii:
.doit:
ret
;-----------------------------------------------------------------------------
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