WebSVN – Kolibri OS – Diff – /kernel/trunk/fs/fs_lfn.inc


; 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
;*******************************************************

Rev 94	Rev 95
1	; System function 70 - files with long names (LFN)	1	; System function 70 - files with long names (LFN)
2	; diamond, 2006	2	; diamond, 2006
3		3
4	iglobal	4	iglobal
5	; in this table names must be in lowercase	5	; in this table names must be in lowercase
6	rootdirs:	6	rootdirs:
7	db 2,'rd'	7	db 2,'rd'
8	dd fs_OnRamdisk	8	dd fs_OnRamdisk
9	dd fs_NextRamdisk	9	dd fs_NextRamdisk
10	db 7,'ramdisk'	10	db 7,'ramdisk'
11	dd fs_OnRamdisk	11	dd fs_OnRamdisk
12	dd fs_NextRamdisk	12	dd fs_NextRamdisk
13	db 2,'fd'	13	db 2,'fd'
14	dd fs_OnFloppy	14	dd fs_OnFloppy
15	dd fs_NextFloppy	15	dd fs_NextFloppy
16	db 10,'floppydisk'	16	db 10,'floppydisk'
17	dd fs_OnFloppy	17	dd fs_OnFloppy
18	dd fs_NextFloppy	18	dd fs_NextFloppy
19	db 3,'hd0'	19	db 3,'hd0'
20	dd fs_OnHd0	20	dd fs_OnHd0
21	dd fs_NextHd0	21	dd fs_NextHd0
22	db 3,'hd1'	22	db 3,'hd1'
23	dd fs_OnHd1	23	dd fs_OnHd1
24	dd fs_NextHd1	24	dd fs_NextHd1
25	db 3,'hd2'	25	db 3,'hd2'
26	dd fs_OnHd2	26	dd fs_OnHd2
27	dd fs_NextHd2	27	dd fs_NextHd2
28	db 3,'hd3'	28	db 3,'hd3'
29	dd fs_OnHd3	29	dd fs_OnHd3
30	dd fs_NextHd3	30	dd fs_NextHd3
31	;**********************************************	31	;**********************************************
32	db 3,'cd0'	32	db 3,'cd0'
33	dd fs_OnCd0	33	dd fs_OnCd0
34	dd fs_NextCd	34	dd fs_NextCd
35	db 3,'cd1'	35	db 3,'cd1'
36	dd fs_OnCd1	36	dd fs_OnCd1
37	dd fs_NextCd	37	dd fs_NextCd
38	db 3,'cd2'	38	db 3,'cd2'
39	dd fs_OnCd2	39	dd fs_OnCd2
40	dd fs_NextCd	40	dd fs_NextCd
41	db 3,'cd3'	41	db 3,'cd3'
42	dd fs_OnCd3	42	dd fs_OnCd3
43	dd fs_NextCd	43	dd fs_NextCd
44	;***********************************************	44	;***********************************************
45	db 0	45	db 0
46		46
47		47
48	virtual_root_query:	48	virtual_root_query:
49	dd fs_HasRamdisk	49	dd fs_HasRamdisk
50	db 'rd',0	50	db 'rd',0
51	dd fs_HasFloppy	51	dd fs_HasFloppy
52	db 'fd',0	52	db 'fd',0
53	dd fs_HasHd0	53	dd fs_HasHd0
54	db 'hd0',0	54	db 'hd0',0
55	dd fs_HasHd1	55	dd fs_HasHd1
56	db 'hd1',0	56	db 'hd1',0
57	dd fs_HasHd2	57	dd fs_HasHd2
58	db 'hd2',0	58	db 'hd2',0
59	dd fs_HasHd3	59	dd fs_HasHd3
60	db 'hd3',0	60	db 'hd3',0
61	;**********************************************	61	;**********************************************
62	dd fs_HasCd0	62	dd fs_HasCd0
63	db 'cd0',0	63	db 'cd0',0
64	dd fs_HasCd1	64	dd fs_HasCd1
65	db 'cd1',0	65	db 'cd1',0
66	dd fs_HasCd2	66	dd fs_HasCd2
67	db 'cd2',0	67	db 'cd2',0
68	dd fs_HasCd3	68	dd fs_HasCd3
69	db 'cd3',0	69	db 'cd3',0
70	;**********************************************	70	;**********************************************
71	dd 0	71	dd 0
72	endg	72	endg
73		73
74	file_system_lfn:	74	file_system_lfn:
75	; in: eax->fileinfo block	75	; in: eax->fileinfo block
76	; operation codes:	76	; operation codes:
77	; 0 : read file	77	; 0 : read file
78	; 1 : read folder	78	; 1 : read folder
79	; 2 : create/rewrite file	79	; 2 : create/rewrite file
80	; 3 : write/append to file - not implemented yet	80	; 3 : write/append to file - not implemented yet
81	; 4 : set end of file - not implemented yet	81	; 4 : set end of file - not implemented yet
82	; 5 : get file/directory attributes structure	82	; 5 : get file/directory attributes structure
83	; 6 : set file/directory attributes structure	83	; 6 : set file/directory attributes structure
84	; 7 : start application	84	; 7 : start application
85	; 8 : delete file - not implemented yet	85	; 8 : delete file - not implemented yet
86	; 9 : create directory - not implemented yet	86	; 9 : create directory - not implemented yet
87	; 10: rename file/directory - not implemented yet	87	; 10: rename file/directory - not implemented yet
88		88
89	add eax, std_application_base_address	89	add eax, std_application_base_address
90	; parse file name	90	; parse file name
91	xchg ebx, eax	91	xchg ebx, eax
92	lea esi, [ebx+20]	92	lea esi, [ebx+20]
93	mov ebp, esi ; for 'start app' function full path must be known	93	mov ebp, esi ; for 'start app' function full path must be known
94	lodsb	94	lodsb
95	test al, al	95	test al, al
96	jnz @f	96	jnz @f
97	mov esi, [esi]	97	mov esi, [esi]
98	add esi, std_application_base_address	98	add esi, std_application_base_address
99	mov ebp, esi	99	mov ebp, esi
100	lodsb	100	lodsb
101	@@:	101	@@:
102	cmp al, '/'	102	cmp al, '/'
103	jz @f	103	jz @f
104	.notfound:	104	.notfound:
105	mov dword [esp+36], 5 ; file not found	105	mov dword [esp+36], 5 ; file not found
106	ret	106	ret
107	@@:	107	@@:
108	cmp byte [esi], 0	108	cmp byte [esi], 0
109	jz .rootdir	109	jz .rootdir
110	mov edi, rootdirs-8	110	mov edi, rootdirs-8
111	xor ecx, ecx	111	xor ecx, ecx
112	push esi	112	push esi
113	.scan1:	113	.scan1:
114	pop esi	114	pop esi
115	add edi, ecx	115	add edi, ecx
116	scasd	116	scasd
117	scasd	117	scasd
118	mov cl, byte [edi]	118	mov cl, byte [edi]
119	jecxz .notfound	119	jecxz .notfound
120	inc edi	120	inc edi
121	push esi	121	push esi
122	@@:	122	@@:
123	lodsb	123	lodsb
124	or al, 20h	124	or al, 20h
125	scasb	125	scasb
126	loopz @b	126	loopz @b
127	jnz .scan1	127	jnz .scan1
128	lodsb	128	lodsb
129	cmp al, '/'	129	cmp al, '/'
130	jz .found1	130	jz .found1
131	test al, al	131	test al, al
132	jnz .scan1	132	jnz .scan1
133	pop eax	133	pop eax
134	; directory /xxx	134	; directory /xxx
135	.maindir:	135	.maindir:
136	cmp dword [ebx], 1	136	cmp dword [ebx], 1
137	jnz .access_denied	137	jnz .access_denied
138	xor eax, eax	138	xor eax, eax
139	mov ebp, [ebx+12]	139	mov ebp, [ebx+12]
140	mov edx, [ebx+16]	140	mov edx, [ebx+16]
141	add edx, std_application_base_address	141	add edx, std_application_base_address
142	push dword [ebx+4] ; first block	142	push dword [ebx+4] ; first block
143	mov ebx, [ebx+8] ; flags	143	mov ebx, [ebx+8] ; flags
144	mov esi, [edi+4]	144	mov esi, [edi+4]
145	; ebx=flags, [esp]=first block, ebp=number of blocks, edx=return area, esi='Next' handler	145	; ebx=flags, [esp]=first block, ebp=number of blocks, edx=return area, esi='Next' handler
146	mov edi, edx	146	mov edi, edx
147	mov ecx, 32/4	147	mov ecx, 32/4
148	rep stosd	148	rep stosd
149	mov byte [edx], 1 ; version	149	mov byte [edx], 1 ; version
150	.maindir_loop:	150	.maindir_loop:
151	call esi	151	call esi
152	jc .maindir_done	152	jc .maindir_done
153	inc dword [edx+8]	153	inc dword [edx+8]
154	dec dword [esp]	154	dec dword [esp]
155	jns .maindir_loop	155	jns .maindir_loop
156	dec ebp	156	dec ebp
157	js .maindir_loop	157	js .maindir_loop
158	inc dword [edx+4]	158	inc dword [edx+4]
159	mov dword [edi], 0x10 ; attributes: folder	159	mov dword [edi], 0x10 ; attributes: folder
160	mov dword [edi+4], 1 ; name type: UNICODE	160	mov dword [edi+4], 1 ; name type: UNICODE
161	push eax	161	push eax
162	xor eax, eax	162	xor eax, eax
163	add edi, 8	163	add edi, 8
164	mov ecx, 40/4-2	164	mov ecx, 40/4-2
165	rep stosd	165	rep stosd
166	pop eax	166	pop eax
167	push eax edx	167	push eax edx
168	; convert number in eax to decimal UNICODE string	168	; convert number in eax to decimal UNICODE string
169	push edi	169	push edi
170	push -'0'	170	push -'0'
171	mov cl, 10	171	mov cl, 10
172	@@:	172	@@:
173	xor edx, edx	173	xor edx, edx
174	div ecx	174	div ecx
175	push edx	175	push edx
176	test eax, eax	176	test eax, eax
177	jnz @b	177	jnz @b
178	@@:	178	@@:
179	pop eax	179	pop eax
180	add al, '0'	180	add al, '0'
181	stosb	181	stosb
182	test bl, 1 ; UNICODE name?	182	test bl, 1 ; UNICODE name?
183	jz .ansi2	183	jz .ansi2
184	mov byte [edi], 0	184	mov byte [edi], 0
185	inc edi	185	inc edi
186	.ansi2:	186	.ansi2:
187	test al, al	187	test al, al
188	jnz @b	188	jnz @b
189	mov byte [edi-1], 0	189	mov byte [edi-1], 0
190	pop edi	190	pop edi
191	; UNICODE name length is 520 bytes, ANSI - 264	191	; UNICODE name length is 520 bytes, ANSI - 264
192	add edi, 520	192	add edi, 520
193	test bl, 1	193	test bl, 1
194	jnz @f	194	jnz @f
195	sub edi, 520-264	195	sub edi, 520-264
196	@@:	196	@@:
197	pop edx eax	197	pop edx eax
198	jmp .maindir_loop	198	jmp .maindir_loop
199	.maindir_done:	199	.maindir_done:
200	pop eax	200	pop eax
201	mov ebx, [edx+4]	201	mov ebx, [edx+4]
202	xor eax, eax	202	xor eax, eax
203	dec ebp	203	dec ebp
204	js @f	204	js @f
205	mov al, ERROR_END_OF_FILE	205	mov al, ERROR_END_OF_FILE
206	@@:	206	@@:
207	mov [esp+36], eax	207	mov [esp+36], eax
208	mov [esp+24], ebx	208	mov [esp+24], ebx
209	ret	209	ret
210	; directory /	210	; directory /
211	.rootdir:	211	.rootdir:
212	cmp dword [ebx], 1 ; read folder?	212	cmp dword [ebx], 1 ; read folder?
213	jz .readroot	213	jz .readroot
214	.access_denied:	214	.access_denied:
215	mov dword [esp+36], 10 ; access denied	215	mov dword [esp+36], 10 ; access denied
216	ret	216	ret
217		217
218	.readroot:	218	.readroot:
219	; virtual root folder - special handler	219	; virtual root folder - special handler
220	mov esi, virtual_root_query	220	mov esi, virtual_root_query
221	mov ebp, [ebx+12]	221	mov ebp, [ebx+12]
222	mov edx, [ebx+16]	222	mov edx, [ebx+16]
223	add edx, std_application_base_address	223	add edx, std_application_base_address
224	push dword [ebx+4] ; first block	224	push dword [ebx+4] ; first block
225	mov ebx, [ebx+8] ; flags	225	mov ebx, [ebx+8] ; flags
226	xor eax, eax	226	xor eax, eax
227	; eax=0, [esp]=first block, ebx=flags, ebp=number of blocks, edx=return area	227	; eax=0, [esp]=first block, ebx=flags, ebp=number of blocks, edx=return area
228	mov edi, edx	228	mov edi, edx
229	mov ecx, 32/4	229	mov ecx, 32/4
230	rep stosd	230	rep stosd
231	mov byte [edx], 1 ; version	231	mov byte [edx], 1 ; version
232	.readroot_loop:	232	.readroot_loop:
233	cmp dword [esi], eax	233	cmp dword [esi], eax
234	jz .readroot_done	234	jz .readroot_done
235	call dword [esi]	235	call dword [esi]
236	add esi, 4	236	add esi, 4
237	test eax, eax	237	test eax, eax
238	jnz @f	238	jnz @f
239	.readroot_next:	239	.readroot_next:
240	or ecx, -1	240	or ecx, -1
241	xchg esi, edi	241	xchg esi, edi
242	repnz scasb	242	repnz scasb
243	xchg esi, edi	243	xchg esi, edi
244	jmp .readroot_loop	244	jmp .readroot_loop
245	@@:	245	@@:
246	xor eax, eax	246	xor eax, eax
247	inc dword [edx+8]	247	inc dword [edx+8]
248	dec dword [esp]	248	dec dword [esp]
249	jns .readroot_next	249	jns .readroot_next
250	dec ebp	250	dec ebp
251	js .readroot_next	251	js .readroot_next
252	inc dword [edx+4]	252	inc dword [edx+4]
253	mov dword [edi], 0x10 ; attributes: folder	253	mov dword [edi], 0x10 ; attributes: folder
254	mov dword [edi+4], 1 ; name type: UNICODE	254	mov dword [edi+4], 1 ; name type: UNICODE
255	add edi, 8	255	add edi, 8
256	mov ecx, 40/4-2	256	mov ecx, 40/4-2
257	rep stosd	257	rep stosd
258	push edi	258	push edi
259	@@:	259	@@:
260	lodsb	260	lodsb
261	stosb	261	stosb
262	test bl, 1	262	test bl, 1
263	jz .ansi	263	jz .ansi
264	mov byte [edi], 0	264	mov byte [edi], 0
265	inc edi	265	inc edi
266	.ansi:	266	.ansi:
267	test eax, eax	267	test eax, eax
268	jnz @b	268	jnz @b
269	pop edi	269	pop edi
270	add edi, 520	270	add edi, 520
271	test bl, 1	271	test bl, 1
272	jnz .readroot_loop	272	jnz .readroot_loop
273	sub edi, 520-264	273	sub edi, 520-264
274	jmp .readroot_loop	274	jmp .readroot_loop
275	.readroot_done:	275	.readroot_done:
276	pop eax	276	pop eax
277	mov ebx, [edx+4]	277	mov ebx, [edx+4]
278	xor eax, eax	278	xor eax, eax
279	dec ebp	279	dec ebp
280	js @f	280	js @f
281	mov al, ERROR_END_OF_FILE	281	mov al, ERROR_END_OF_FILE
282	@@:	282	@@:
283	mov [esp+36], eax	283	mov [esp+36], eax
284	mov [esp+24], ebx	284	mov [esp+24], ebx
285	ret	285	ret
286		286
287	.found1:	287	.found1:
288	pop eax	288	pop eax
289	cmp byte [esi], 0	289	cmp byte [esi], 0
290	jz .maindir	290	jz .maindir
291	; read partition number	291	; read partition number
292	xor ecx, ecx	292	xor ecx, ecx
293	xor eax, eax	293	xor eax, eax
294	@@:	294	@@:
295	lodsb	295	lodsb
296	cmp al, '/'	296	cmp al, '/'
297	jz .done1	297	jz .done1
298	test al, al	298	test al, al
299	jz .done1	299	jz .done1
300	sub al, '0'	300	sub al, '0'
301	cmp al, 9	301	cmp al, 9
302	ja .notfound	302	ja .notfound
303	imul ecx, 10	303	imul ecx, 10
304	add ecx, eax	304	add ecx, eax
305	jmp @b	305	jmp @b
306	.done1:	306	.done1:
307	test ecx, ecx	307	test ecx, ecx
308	jz .notfound	308	jz .notfound
309	test al, al	309	test al, al
310	jnz @f	310	jnz @f
311	dec esi	311	dec esi
312	@@:	312	@@:
313	; now [edi] contains handler address, ecx - partition number,	313	; now [edi] contains handler address, ecx - partition number,
314	; esi points to ASCIIZ string - rest of name	314	; esi points to ASCIIZ string - rest of name
315	jmp dword [edi]	315	jmp dword [edi]
316		316
317	; handlers for devices	317	; handlers for devices
318	; in: ecx = 0 => query virtual directory /xxx	318	; in: ecx = 0 => query virtual directory /xxx
319	; in: ecx = partition number	319	; in: ecx = partition number
320	; esi -> relative (for device) name	320	; esi -> relative (for device) name
321	; ebx -> fileinfo	321	; ebx -> fileinfo
322	; out: [esp+36]=image of eax, [esp+24]=image of ebx	322	; out: [esp+36]=image of eax, [esp+24]=image of ebx
323		323
324	fs_OnRamdisk:	324	fs_OnRamdisk:
325	cmp ecx, 1	325	cmp ecx, 1
326	jnz file_system_lfn.notfound	326	jnz file_system_lfn.notfound
327	mov eax, [ebx]	327	mov eax, [ebx]
328	cmp eax, fs_NumRamdiskServices	328	cmp eax, fs_NumRamdiskServices
329	jae .not_impl	329	jae .not_impl
330	mov ecx, [ebx+12]	330	mov ecx, [ebx+12]
331	mov edx, [ebx+16]	331	mov edx, [ebx+16]
332	add edx, std_application_base_address	332	add edx, std_application_base_address
333	add ebx, 4	333	add ebx, 4
334	call dword [fs_RamdiskServices + eax*4]	334	call dword [fs_RamdiskServices + eax*4]
335	mov [esp+36], eax	335	mov [esp+36], eax
336	mov [esp+24], ebx	336	mov [esp+24], ebx
337	ret	337	ret
338	.not_impl:	338	.not_impl:
339	mov dword [esp+36], 2 ; not implemented	339	mov dword [esp+36], 2 ; not implemented
340	ret	340	ret
341		341
342	fs_NotImplemented:	342	fs_NotImplemented:
343	mov eax, 2	343	mov eax, 2
344	ret	344	ret
345		345
346	fs_RamdiskServices:	346	fs_RamdiskServices:
347	dd fs_RamdiskRead	347	dd fs_RamdiskRead
348	dd fs_RamdiskReadFolder	348	dd fs_RamdiskReadFolder
349	dd fs_RamdiskRewrite	349	dd fs_RamdiskRewrite
350	dd fs_NotImplemented	350	dd fs_NotImplemented
351	dd fs_NotImplemented	351	dd fs_NotImplemented
352	dd fs_RamdiskGetFileInfo	352	dd fs_RamdiskGetFileInfo
353	dd fs_RamdiskSetFileInfo	353	dd fs_RamdiskSetFileInfo
354	dd fs_RamdiskExecute	354	dd fs_RamdiskExecute
355	fs_NumRamdiskServices = ($ - fs_RamdiskServices)/4	355	fs_NumRamdiskServices = ($ - fs_RamdiskServices)/4
356		356
357	fs_OnFloppy:	357	fs_OnFloppy:
358	cmp ecx, 2	358	cmp ecx, 2
359	ja file_system_lfn.notfound	359	ja file_system_lfn.notfound
360	mov eax, [ebx]	360	mov eax, [ebx]
361	cmp eax, fs_NumFloppyServices	361	cmp eax, fs_NumFloppyServices
362	jae fs_OnRamdisk.not_impl	362	jae fs_OnRamdisk.not_impl
363	call reserve_flp	363	call reserve_flp
364	mov [flp_number], cl	364	mov [flp_number], cl
365	mov ecx, [ebx+12]	365	mov ecx, [ebx+12]
366	mov edx, [ebx+16]	366	mov edx, [ebx+16]
367	add edx, std_application_base_address	367	add edx, std_application_base_address
368	add ebx, 4	368	add ebx, 4
369	call dword [fs_FloppyServices + eax*4]	369	call dword [fs_FloppyServices + eax*4]
370	and [flp_status], 0	370	and [flp_status], 0
371	mov [esp+36], eax	371	mov [esp+36], eax
372	mov [esp+24], ebx	372	mov [esp+24], ebx
373	ret	373	ret
374		374
375	fs_FloppyServices:	375	fs_FloppyServices:
376	dd fs_FloppyRead	376	dd fs_FloppyRead
377	dd fs_FloppyReadFolder	377	dd fs_FloppyReadFolder
378	dd fs_FloppyRewrite	378	dd fs_FloppyRewrite
379	dd fs_NotImplemented	379	dd fs_NotImplemented
380	dd fs_NotImplemented	380	dd fs_NotImplemented
381	dd fs_FloppyGetFileInfo	381	dd fs_FloppyGetFileInfo
382	dd fs_FloppySetFileInfo	382	dd fs_FloppySetFileInfo
383	dd fs_FloppyExecute	383	dd fs_FloppyExecute
384	fs_NumFloppyServices = ($ - fs_FloppyServices)/4	384	fs_NumFloppyServices = ($ - fs_FloppyServices)/4
385		385
386	fs_OnHd0:	386	fs_OnHd0:
387	call reserve_hd1	387	call reserve_hd1
388	mov [hdbase], 0x1F0	388	mov [hdbase], 0x1F0
389	mov [hdid], 0	389	mov [hdid], 0
390	push 1	390	push 1
391	jmp fs_OnHd	391	jmp fs_OnHd
392	fs_OnHd1:	392	fs_OnHd1:
393	call reserve_hd1	393	call reserve_hd1
394	mov [hdbase], 0x1F0	394	mov [hdbase], 0x1F0
395	mov [hdid], 0x10	395	mov [hdid], 0x10
396	push 2	396	push 2
397	jmp fs_OnHd	397	jmp fs_OnHd
398	fs_OnHd2:	398	fs_OnHd2:
399	call reserve_hd1	399	call reserve_hd1
400	mov [hdbase], 0x170	400	mov [hdbase], 0x170
401	mov [hdid], 0	401	mov [hdid], 0
402	push 3	402	push 3
403	jmp fs_OnHd	403	jmp fs_OnHd
404	fs_OnHd3:	404	fs_OnHd3:
405	call reserve_hd1	405	call reserve_hd1
406	mov [hdbase], 0x170	406	mov [hdbase], 0x170
407	mov [hdid], 0x10	407	mov [hdid], 0x10
408	push 4	408	push 4
409	fs_OnHd:	409	fs_OnHd:
-		410	call reserve_hd_channel
410	pop eax	411	pop eax
411	mov [hdpos], eax	412	mov [hdpos], eax
412	cmp ecx, 0x100	413	cmp ecx, 0x100
413	jae .nf	414	jae .nf
414	cmp cl, [0x40001+eax]	415	cmp cl, [0x40001+eax]
415	jbe @f	416	jbe @f
416	.nf:	417	.nf:
-		418	call free_hd_channel
417	and [hd1_status], 0	419	and [hd1_status], 0
418	mov dword [esp+36], 5 ; not found	420	mov dword [esp+36], 5 ; not found
419	ret	421	ret
420	@@:	422	@@:
421	mov [fat32part], ecx	423	mov [fat32part], ecx
422	push ebx esi	424	push ebx esi
423	call choice_necessity_partition_1	425	call choice_necessity_partition_1
424	pop esi ebx	426	pop esi ebx
425	mov ecx, [ebx+12]	427	mov ecx, [ebx+12]
426	mov edx, [ebx+16]	428	mov edx, [ebx+16]
427	add edx, std_application_base_address	429	add edx, std_application_base_address
428	mov eax, [ebx]	430	mov eax, [ebx]
429	cmp eax, fs_NumHdServices	431	cmp eax, fs_NumHdServices
430	jae .not_impl	432	jae .not_impl
431	add ebx, 4	433	add ebx, 4
432	call dword [fs_HdServices + eax*4]	434	call dword [fs_HdServices + eax*4]
-		435	call free_hd_channel
433	and [hd1_status], 0	436	and [hd1_status], 0
434	mov [esp+36], eax	437	mov [esp+36], eax
435	mov [esp+24], ebx	438	mov [esp+24], ebx
436	ret	439	ret
437	.not_impl:	440	.not_impl:
-		441	call free_hd_channel
438	and [hd1_status], 0	442	and [hd1_status], 0
439	mov dword [esp+36], 2 ; not implemented	443	mov dword [esp+36], 2 ; not implemented
440	ret	444	ret
441		445
442	fs_HdServices:	446	fs_HdServices:
443	dd fs_HdRead	447	dd fs_HdRead
444	dd fs_HdReadFolder	448	dd fs_HdReadFolder
445	dd fs_HdRewrite	449	dd fs_HdRewrite
446	dd fs_NotImplemented	450	dd fs_NotImplemented
447	dd fs_NotImplemented	451	dd fs_NotImplemented
448	dd fs_HdGetFileInfo	452	dd fs_HdGetFileInfo
449	dd fs_HdSetFileInfo	453	dd fs_HdSetFileInfo
450	dd fs_HdExecute	454	dd fs_HdExecute
451	fs_NumHdServices = ($ - fs_HdServices)/4	455	fs_NumHdServices = ($ - fs_HdServices)/4
452		456
453	;*******************************************************	457	;*******************************************************
454	fs_OnCd0:	458	fs_OnCd0:
455	call reserve_cd	459	call reserve_cd
456	mov [ChannelNumber],1	460	mov [ChannelNumber],1
457	mov [DiskNumber],0	461	mov [DiskNumber],0
458	push 6	462	push 6
459	jmp fs_OnCd	463	jmp fs_OnCd
460	fs_OnCd1:	464	fs_OnCd1:
461	call reserve_cd	465	call reserve_cd
462	mov [ChannelNumber],1	466	mov [ChannelNumber],1
463	mov [DiskNumber],1	467	mov [DiskNumber],1
464	push 4	468	push 4
465	jmp fs_OnCd	469	jmp fs_OnCd
466	fs_OnCd2:	470	fs_OnCd2:
467	call reserve_cd	471	call reserve_cd
468	mov [ChannelNumber],2	472	mov [ChannelNumber],2
469	mov [DiskNumber],0	473	mov [DiskNumber],0
470	push 2	474	push 2
471	jmp fs_OnCd	475	jmp fs_OnCd
472	fs_OnCd3:	476	fs_OnCd3:
473	call reserve_cd	477	call reserve_cd
474	mov [ChannelNumber],2	478	mov [ChannelNumber],2
475	mov [DiskNumber],1	479	mov [DiskNumber],1
476	push 0	480	push 0
477	fs_OnCd:	481	fs_OnCd:
478		-
-		482	call reserve_cd_channel
479	pop eax	483	pop eax
480	mov [hdpos], eax	484	mov [hdpos], eax
481	cmp ecx, 0x100	485	cmp ecx, 0x100
482	jae .nf	486	jae .nf
483	push cx bx	487	push cx bx
484	mov cl,al	488	mov cl,al
485	mov bl,[0x40001]	489	mov bl,[0x40001]
486	shr bl,cl	490	shr bl,cl
487	test bl,2	491	test bl,2
488	pop bx cx	492	pop bx cx
489		493
490	jnz @f	494	jnz @f
491	.nf:	495	.nf:
-		496	call free_cd_channel
492	and [cd_status], 0	497	and [cd_status], 0
493	mov dword [esp+36], 5 ; not found	498	mov dword [esp+36], 5 ; not found
494	ret	499	ret

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(root)/kernel/trunk/fs/fs_lfn.inc – Rev 94 → 95