forked from KolibriOS/kolibrios
exFAT - support for file name hashes
git-svn-id: svn://kolibrios.org@9738 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Marat Zakiyanov
parent
fcc5dc0546
commit
c99afa0b60
@ -70,6 +70,9 @@ RAX_high dd ?
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RCX_high dd ?
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RDX_high dd ?
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RDI_high dd ?
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current_hash dd ?
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hash_flag dd ?
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need_hash dd ?
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volumeLabel rb 12
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; The next two areas (32+32) should be arranged sequentially.
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; Do not change their location!!!
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@ -365,7 +368,9 @@ exFAT_get_name:
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;--------------------------------------
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.file_directory_entry:
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; DEBUGF 1, "K : exFAT_get_name 0x85\n"
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movzx eax, byte [edi+1] ; Number of Secondary directory entries
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xor eax, eax
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mov [ebp+exFAT.hash_flag], eax ; dword 0
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mov al, byte [edi+1] ; Number of Secondary directory entries
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dec eax
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mov [ebp+exFAT.secondary_dir_entry], eax
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; DEBUGF 1, "K : exFAT_get_name 0x85 SDE: %x\n", eax
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@ -375,6 +380,20 @@ exFAT_get_name:
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;--------------------------------------
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.stream_extension_directory_entry:
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; DEBUGF 1, "K : exFAT_get_name 0xC0\n"
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; DEBUGF 1, "K : exFAT SEDE need_hash :%x\n", [ebp+exFAT.need_hash]
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mov eax, [ebp+exFAT.need_hash]
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test eax, eax
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jz .stream_extension_directory_entry_1 ; @f
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movzx eax, word [edi+4] ; hash of the file name
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; DEBUGF 1, "K : exFAT hash 1 :%x\n", eax
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; DEBUGF 1, "K : exFAT hash 2 :%x\n", [ebp+exFAT.current_hash]
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cmp eax, [ebp+exFAT.current_hash]
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je .stream_extension_directory_entry_1 ; @f
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xor eax, eax
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inc eax
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mov [ebp+exFAT.hash_flag], eax ; dword 1
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; DEBUGF 1, "K : exFAT hashes don't match! \n"
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.stream_extension_directory_entry_1:
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lea esi, [ebp+exFAT.str_ext_dir_entry]
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; DEBUGF 1, "K : exFAT.str_ext_dir_entry ESI: %x [ESI]: %x\n", esi, [esi]
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@@:
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@ -410,7 +429,11 @@ exFAT_get_name:
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; mov ebp,[esp+12+8+4+4+7*4+262*2+4+4]
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; DEBUGF 1, "K : exFAT_get_name.longname Input FS EBP:%x\n", ebp
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; pop ebp
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mov eax, [ebp+exFAT.hash_flag]
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test eax, eax
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jnz .no
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; DEBUGF 1, "K : exFAT_get_name.longname hash match! \n"
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push edi esi
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xchg esi, edi
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@ -686,7 +709,10 @@ exFAT_find_lfn:
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; esi -> next name in the path
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; edi -> direntry
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; CF=1 -> file not found, eax = error code
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mov [ebp+exFAT.secondary_dir_entry], dword 1
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xor eax, eax
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inc eax
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mov [ebp+exFAT.secondary_dir_entry], eax ; dword 1
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mov [ebp+exFAT.need_hash], eax ; dword 1
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lea eax, [esp+12]
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call dword [eax-4] ; exFAT_notroot_first
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jc .reterr
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@ -696,6 +722,70 @@ exFAT_find_lfn:
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mov [ebp+exFAT.LFN_reserve_place], eax
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mov [ebp+exFAT.path_in_UTF8], esi
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; DEBUGF 1, "K : exFAT_find_lfn Path: %s\n", esi
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; DEBUGF 1, "K : exFAT Path: %s\n", esi
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; DEBUGF 1, "K : exFAT Path1: %x %x %x\n", [esi], [esi+4], [esi+8]
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push esi edi
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; lea edi, [esp+8]
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mov edi, eax
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align 4
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@@:
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; in: esi -> UTF-8 char (increasing)
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; out: ax = UTF-16 char
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call utf8to16
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call utf16toUpper
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stosw
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test ax, ax
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jz @f
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cmp ax, word 0x002f ; "/"
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jne @b
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@@:
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; mov [edi-2], dword 0
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mov esi, [ebp+exFAT.LFN_reserve_place]
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; DEBUGF 1, "K : exFAT Path2: %x %x %x\n", [esi], [esi+4], [esi+8]
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push ebx ecx
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mov ecx, edi
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sub ecx, esi
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sub ecx, 2 ; correction for zero or "/"
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; exFAT_hash_calculate
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; in:
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; esi -> NameUTF16
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; ecx -> NameUTF16 length
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; out: ax = hash
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xor eax, eax
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xor ebx, ebx
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;--------------------------------------
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align 4
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.start:
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; DEBUGF 1, "Hash start EAX:%x ECX:%x\n", eax, ecx
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mov bx, ax
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; (Hash&1) ? 0x8000 : 0)
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and ax, 0x1
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jz .else
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mov ax, 0x8000
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jmp @f
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;--------------------------------------
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.else:
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xor ax, ax
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;--------------------------------------
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@@:
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; DEBUGF 1, "(Hash&1) EAX:%x\n", eax
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; (Hash>>1)
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shr bx, 1
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; DEBUGF 1, "(Hash>>1) EBX:%x\n", ebx
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add ax, bx
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; DEBUGF 1, "+ (Hash>>1)) EAX:%x\n", eax
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movzx bx, byte [esi]
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add ax, bx
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; DEBUGF 1, "+ (UInt16)Buffer[Index] EAX:%x\n", eax
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inc esi
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dec ecx
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jnz .start
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;--------------------------------------
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pop ecx ebx
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mov [ebp+exFAT.current_hash], eax
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; DEBUGF 1, "K : exFAT current hash :%x\n", eax
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pop edi esi
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.l1:
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; push esi
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; lea esi, [esp+4]
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@ -706,7 +796,7 @@ exFAT_find_lfn:
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; mov ebp,[esp+12+8+4+4+7*4+262*2+4]
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; DEBUGF 1, "K : exFAT_get_name Input FS EBP:%x\n", ebp
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; pop ebp
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; DEBUGF 1, "K : exFAT FL need_hash :%x\n", [ebp+exFAT.need_hash]
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call exFAT_get_name
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; mov [ebp+exFAT.LFN_reserve_place], esi
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; pop esi
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@ -718,10 +808,10 @@ exFAT_find_lfn:
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jc .no
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push eax
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; push eax
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xor eax, eax
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cmp [ebp+exFAT.secondary_dir_entry], eax
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pop eax
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; pop eax
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jnz .no
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push edi esi
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@ -808,6 +898,9 @@ exFAT_ReadFile:
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; out:
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; eax, ebx = return values for sysfunc 70
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call exFAT_lock
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xor eax, eax
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mov [ebp+exFAT.need_hash], eax ; dword 0
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mov [ebp+exFAT.hash_flag], eax ; dword 0
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call exFAT_hd_find_lfn
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jc .notFound
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; test byte [edi+11], 0x10 ; do not allow read directories
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@ -1320,6 +1413,8 @@ exFAT_ReadFolder:
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; eax, ebx = return values for sysfunc 70
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call exFAT_lock
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xor eax, eax
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mov [ebp+exFAT.need_hash], eax ; dword 0
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mov [ebp+exFAT.hash_flag], eax ; dword 0
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mov [ebp+exFAT.General_Sec_Flags], eax
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; DEBUGF 1, "K : exFAT_ReadFolder General_Sec_Flags 1 %x\n", eax
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mov eax, [ebp+exFAT.ROOT_CLUSTER]
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@ -1343,6 +1438,9 @@ exFAT_ReadFolder:
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; jmp .error
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; test byte [edi+11], 0x10 ; do not allow read files
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; jz .accessDenied
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xor eax, eax
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mov [ebp+exFAT.need_hash], eax ; dword 0
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mov [ebp+exFAT.hash_flag], eax ; dword 0
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lea eax, [ebp+exFAT.file_dir_entry]
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test byte [eax+4], 10000b ; do not allow read files
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jz .accessDenied
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@ -1464,6 +1562,7 @@ exFAT_ReadFolder:
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; DEBUGF 1, "K : exFAT_ReadFolder.l1 \n"
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; push esi
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; lea esi, [esp+20]
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; DEBUGF 1, "K : exFAT RD need_hash :%x\n", [ebp+exFAT.need_hash]
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call exFAT_get_name
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; pop esi
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jc .l2
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@ -1667,6 +1766,9 @@ exFAT_GetFileInfo:
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cmp byte [esi], 0
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jz .volume
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call exFAT_lock
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xor eax, eax
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mov [ebp+exFAT.need_hash], eax ; dword 0
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mov [ebp+exFAT.hash_flag], eax ; dword 0
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call exFAT_hd_find_lfn
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jc @f
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lea edi, [ebp+exFAT.file_dir_entry]
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