Subversion Repositories Kolibri OS

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;;                                                              ;;

;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;;

;; Distributed under terms of the GNU General Public License    ;;

;;                                                              ;;

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

$Revision: 593 $

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

IDE_Channel_1		       db  0

IDE_Channel_2		       db  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:

    cmp   [ChannelNumber],1

    jne   .IDE_Channel_2

.IDE_Channel_1:

    cli

    cmp   [IDE_Channel_1],0

    je	  .reserve_ok_1

    sti

    call  change_task

    jmp   .IDE_Channel_1

.IDE_Channel_2:

    cli

    cmp   [IDE_Channel_2],0

    je	  .reserve_ok_2

    sti

    call  change_task

    jmp   .IDE_Channel_1

.reserve_ok_1:

    mov [IDE_Channel_1],1

    ret

.reserve_ok_2:

    mov [IDE_Channel_2],1

    ret

free_cd_channel:

    cmp   [ChannelNumber],1

    jne   .IDE_Channel_2

.IDE_Channel_1:

    mov [IDE_Channel_1],0

    ret

.IDE_Channel_2:

    mov [IDE_Channel_2],0

    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] ; �������� ������ �������� ������

	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	  ; ������ ������ �����

    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	  ; ������ ������ �����

    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]	; ������ �����������

.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	    ; ������ ������ ����������

	cmp	[DevErrorCode], 0

	jne	.noaccess_1

	call	.get_names_from_buffer

	sub	eax,2048

; ���������� �����������?

	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

;    jmp  .unicode

.ansi:

    cmp   [cd_counter_block],2

    jbe   .ansi_parent_directory

    cld

    lodsw

    xchg ah,al

    call uni2ansi_char

    cld

    stosb

; �������� ����� �����

    mov   ax,[esi]

    cmp   ax,word 3B00h ; ��������� ����� ����� ';'

    je	 .cd_get_parameters_of_file_1

; �������� ��� ������ �� ��������������� �����������

    movzx   eax,byte [ebp-33]

    add   eax,ebp

    sub   eax,34

    cmp   esi,eax

    je	 .cd_get_parameters_of_file_1

; �������� ����� �����

    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

; �������� ����� �����

    mov   ax,[esi]

    cmp   ax,word 3B00h ; ��������� ����� ����� ';'

    je	 .cd_get_parameters_of_file_2

; �������� ��� ������ �� ��������������� �����������

    movzx   eax,byte [ebp-33]

    add   eax,ebp

    sub   eax,34

    cmp   esi,eax

    je	 .cd_get_parameters_of_file_2

; �������� ����� �����

    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:

; �������� �������� �����

    xor   eax,eax

; ���� �� �������������

    inc   eax

    shl   eax,1

; ��� �������?

    test  [ebp-8],byte 2

    jz	  .file

    inc   eax

.file:

; ����� ���� �� ��� � FAT, � ���� ���� ����������

; ���� �� �������� ���������

    shl   eax,3

; ���� �������� �������? (������� �������������)

    test  [ebp-8],byte 1

    jz	  .hidden

    inc   eax

.hidden:

    shl   eax,1

; ���� ������ ������ ��� ������, ��� ��� ��� CD

    inc   eax

    mov   [edi],eax

; �������� ����� ��� �����

;���

    movzx eax,byte [ebp-12]

    shl   eax,8

;������

    mov   al,[ebp-11]

    shl   eax,8

;�������

    mov   al,[ebp-10]

;����� �������� �����

    mov   [edi+8],eax

;����� ���������� �������

    mov   [edi+16],eax

;����� ��������� ������

    mov   [edi+24],eax

; �������� ���� ��� �����

;���

    movzx eax,byte [ebp-15]

    add   eax,1900

    shl   eax,8

;�����

    mov   al,[ebp-14]

    shl   eax,8

;����

    mov   al,[ebp-13]

;���� �������� �����

    mov   [edi+12],eax

;����� ���������� �������

    mov   [edi+20],eax

;����� ��������� ������

    mov   [edi+28],eax

; �������� ��� ������ �����

    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

@@:

; �������� ������ ����� � ������

    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

; 16 ������ ������ ������ ������������ �����

	mov  [CDSectorAddress],dword 15

       mov  [CDDataBuf_pointer],CDDataBuf

       call  prevent_medium_removal

.start:

	inc  dword [CDSectorAddress]

       call  ReadCDWRetr    ;_1

       cmp   [DevErrorCode],0

       jne   .access_denied

; �������� �� ��������

	cmp  [CDDataBuf+1],dword 'CD00'

	jne  .access_denied

	cmp  [CDDataBuf+5],byte '1'

	jne  .access_denied

; ������ �������� ������������ ����� ������������ �����?

	cmp  [CDDataBuf],byte 0xff

	je  .access_denied

; ������ �������� �������������� � ���������� ������������ ����?

	cmp  [CDDataBuf],byte 0x2

	jne  .start

; ������ �������� �������������� ������������ ����?

	cmp  [CDDataBuf+6],byte 0x1

	jne  .start

; ��������� root �����������

	mov  eax,[CDDataBuf+0x9c+2] ; ������ root �����������

	mov  [CDSectorAddress],eax

	mov  eax,[CDDataBuf+0x9c+10] ; ������ root �����������

	cmp    byte [esi], 0

	jnz    @f

	mov   [cd_current_pointer_of_input],CDDataBuf+0x9c

	jmp   .done

@@:

; �������� �����

.mainloop:

	dec  dword [CDSectorAddress]

.read_to_buffer:

	inc  dword [CDSectorAddress]

	mov  [CDDataBuf_pointer],CDDataBuf

	call ReadCDWRetr	 ; ������ ������ ����������

	cmp   [DevErrorCode],0

	jne   .access_denied

	push	ebp

	call	cd_find_name_in_buffer

	pop	ebp

	jnc	.found

	sub  eax,2048

; ���������� �����������?

	cmp  eax,0

	ja   .read_to_buffer

; ��� �������� �������� �������

.access_denied:

	pop  esi eax

	mov   [cd_appl_data],1

	stc

	ret

; ������� ������� ������� ������

  .found:

; ����� ���� �����

	cmp    byte [esi-1], 0

	jz    .done

  .nested:

	mov    eax,[cd_current_pointer_of_input]

	push	dword [eax+2]

	pop	dword [CDSectorAddress]       ; ������ ����������

	mov    eax,[eax+2+8]  ; ������ ����������

	jmp    .mainloop

; ��������� ����� ������

   .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]

	cmp   eax,0   ; ����� �����������?

	je    .next_sector

	cmp   ebp,CDDataBuf+2048     ; ����� ����������?

	jae   .next_sector

	movzx eax, byte [ebp]

	add   [cd_current_pointer_of_input_2],eax ; ��������� ���� ��������

	add   ebp,33 ; ��������� ���������� �� ������ �����

	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 '/'  ; ����������� ����, ����� ����� �������� ��������

    je	 .done

    cmp   [esi],byte 0	; ����������� ����, ����� ����� �������� ��������

    je	 .done

    jmp   .loop

.name_not_coincide:

    pop    edi eax esi

    stc

    ret

.done:

; �������� ����� �����

    cmp   [edi],word 3B00h ; ��������� ����� ����� ';'

    je	 .done_1

; �������� ��� ������ �� ��������������� �����������

    movzx   eax,byte [ebp-33]

    add   eax,ebp

    sub   eax,34

    cmp   edi,eax

    je	 .done_1

; �������� ����� �����

    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, '�'

	jb	.ret

	cmp	al, '�'

	jb	.rus1

	cmp	al, '�'

	ja	.ret

; 0x90-0x9F -> 0xE0-0xEF

	add	al, '�'-'�'

.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, '�'

	jmp	.doit

.yo2:

	mov	al, '�'

	jmp	.doit

.rus1:

; 0x410-0x43F -> 0x80-0xAF

	add	al, 0x70

	jmp	.doit

.rus2:

; 0x440-0x44F -> 0xE0-0xEF

	add	al, 0xA0

.ascii:

.doit:

	ret