forked from KolibriOS/kolibrios
836 lines
19 KiB
PHP
836 lines
19 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; System service for filesystem call ;;
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;; (C) 2004 Ville Turjanmaa, License: GPL ;;
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;; 29.04.2006 Elimination of hangup after the ;;
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;; expiration hd_wait_timeout (for LBA) - Mario79 ;;
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;; 15.01.2005 get file size/attr/date, file_append (only for hd) - ATV ;;
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;; 23.11.2004 test if hd/partition is set - ATV ;;
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;; 18.11.2004 get_disk_info and more error codes - ATV ;;
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;; 08.11.2004 expand_pathz and rename (only for hd) - ATV ;;
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;; 20.10.2004 Makedir/Removedir (only for hd) - ATV ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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iglobal
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dir0: db 'HARDDISK '
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db 'RAMDISK '
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db 'FLOPPYDISK '
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db 0
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dir1: db 'FIRST '
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db 'SECOND '
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db 'THIRD '
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db 'FOURTH '
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db 0
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not_select_IDE db 0
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hd_address_table: dd 0x1f0,0x00,0x1f0,0x10
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dd 0x170,0x00,0x170,0x10
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endg
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file_system:
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; IN:
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;
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; eax = 0 ; read file /RamDisk/First 6
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; eax = 1 ; write file /RamDisk/First 33 /HardDisk/First 56
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; eax = 8 ; lba read
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; eax = 15 ; get_disk_info
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;
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; OUT:
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;
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; eax = 0 : read ok
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; eax = 1 : no hd base and/or partition defined
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; eax = 2 : function is unsupported for this FS
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; eax = 3 : unknown FS
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; eax = 4 : partition not defined at hd
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; eax = 5 : file not found
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; eax = 6 : end of file
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; eax = 7 : memory pointer not in application area
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; eax = 8 : disk full
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; eax = 9 : fat table corrupted
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; eax = 10 : access denied
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; eax = 11 : disk error
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;
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; ebx = size
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; \begin{diamond}[18.03.2006]
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; for subfunction 16 (start application) error codes must be negative
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; because positive values are valid PIDs
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; so possible return values are:
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; eax > 0 : process created, eax=PID
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; -0x10 <= eax < 0 : -eax is filesystem error code:
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; eax = -1 = 0xFFFFFFFF : no hd base and/or partition defined
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; eax = -3 = 0xFFFFFFFD : unknown FS
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; eax = -5 = 0xFFFFFFFB : file not found
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; eax = -6 = 0xFFFFFFFA : unexpected end of file (probably not executable file)
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; eax = -9 = 0xFFFFFFF7 : fat table corrupted
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; eax = -10 = 0xFFFFFFF6 : access denied
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; -0x20 <= eax < -0x10: eax is process creation error code:
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; eax = -0x20 = 0xFFFFFFE0 : too many processes
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; eax = -0x1F = 0xFFFFFFE1 : not Menuet/Kolibri executable
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; eax = -0x1E = 0xFFFFFFE2 : no memory
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; ebx is not changed
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; \end{diamond}[18.03.2006]
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; Extract parameters
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add eax, std_application_base_address ; abs start of info block
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cmp dword [eax+0],15 ; GET_DISK_INFO
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je fs_info
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cmp dword [CURRENT_TASK],1 ; no memory checks for kernel requests
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jz no_checks_for_kernel
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mov edx,eax
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cmp dword [eax+0],1
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jnz .usual_check
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mov ebx,[eax+12]
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add ebx,std_application_base_address
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mov ecx,[eax+8]
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call check_region
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test eax,eax
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jnz area_in_app_mem
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.error_output:
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mov esi,buffer_failed
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call sys_msg_board_str
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; mov eax,7
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mov dword [esp+36],7
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ret
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iglobal
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buffer_failed db 'K : Buffer check failed',13,10,0
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endg
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.usual_check:
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cmp dword [eax+0],0
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mov ecx,512
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jnz .small_size
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mov ecx,[eax+8]
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shl ecx,9
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.small_size:
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mov ebx,[eax+12]
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add ebx,std_application_base_address
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call check_region
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test eax,eax
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jz .error_output
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area_in_app_mem:
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mov eax,edx
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no_checks_for_kernel:
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fs_read:
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mov ebx,[eax+20] ; program wants root directory ?
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test bl,bl
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je fs_getroot
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test bh,bh
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jne fs_noroot
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fs_getroot:
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; \begin{diamond}[18.03.2006]
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; root - only read is allowed
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; other operations return "access denied", eax=10
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; (execute operation returns eax=-10)
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cmp dword [eax], 0
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jz .read_root
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mov dword [esp+36], 10
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ret
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.read_root:
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; \end{diamond}[18.03.2006]
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mov esi,dir0
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mov edi,[eax+12]
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add edi,std_application_base_address
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mov ecx,11
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push ecx
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; cld ; already is
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rep movsb
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mov al,0x10
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stosb
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add edi,32-11-1
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pop ecx
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rep movsb
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stosb
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and dword [esp+36],0 ; ok read
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mov dword [esp+24],32*2 ; size of root
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ret
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fs_info: ;start of code - Mihasik
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push eax
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cmp [eax+21],byte 'h'
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je fs_info_h
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cmp [eax+21],byte 'H'
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je fs_info_h
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cmp [eax+21],byte 'r'
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je fs_info_r
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cmp [eax+21],byte 'R'
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je fs_info_r
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mov eax,3 ;if unknown disk
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xor ebx,ebx
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xor ecx,ecx
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xor edx,edx
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jmp fs_info1
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fs_info_r:
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call ramdisk_free_space ;if ramdisk
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mov ecx,edi ;free space in ecx
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shr ecx,9 ;free clusters
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mov ebx,2847 ;total clusters
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mov edx,512 ;cluster size
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xor eax,eax ;always 0
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jmp fs_info1
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fs_info_h: ;if harddisk
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call get_hd_info
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fs_info1:
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pop edi
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mov [esp+36],eax
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mov [esp+24],ebx ; total clusters on disk
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mov [esp+32],ecx ; free clusters on disk
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mov [edi],edx ; cluster size in bytes
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ret ;end of code - Mihasik
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fs_noroot:
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push dword [eax+0] ; read/write/delete/.../makedir/rename/lba/run
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push dword [eax+4] ; 512 block number to read
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push dword [eax+8] ; bytes to write/append or 512 blocks to read
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mov ebx,[eax+12]
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add ebx,std_application_base_address
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push ebx ; abs start of return/save area
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lea esi,[eax+20] ; abs start of dir + filename
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mov edi,[eax+16]
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add edi,std_application_base_address ; abs start of work area
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call expand_pathz
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push edi ; dir start
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push ebx ; name of file start
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mov eax,[edi+1]
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cmp eax,'RD '
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je fs_yesramdisk
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cmp eax,'RAMD'
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jne fs_noramdisk
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fs_yesramdisk:
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cmp byte [edi+1+11],0
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je fs_give_dir1
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mov eax,[edi+1+12]
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cmp eax,'1 '
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je fs_yesramdisk_first
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cmp eax,'FIRS'
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jne fs_noramdisk
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fs_yesramdisk_first:
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cmp dword [esp+20],8 ; LBA read ramdisk
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jne fs_no_LBA_read_ramdisk
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mov eax,[esp+16] ; LBA block to read
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mov ecx,[esp+8] ; abs pointer to return area
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call LBA_read_ramdisk
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jmp file_system_return
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fs_no_LBA_read_ramdisk:
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cmp dword [esp+20],0 ; READ
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jne fs_noramdisk_read
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mov eax,[esp+4] ; fname
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add eax,2*12+1
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mov ebx,[esp+16] ; block start
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inc ebx
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mov ecx,[esp+12] ; block count
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mov edx,[esp+8] ; return
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mov esi,[esp+0]
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sub esi,eax
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add esi,12+1 ; file name length
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call fileread
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jmp file_system_return
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fs_noramdisk_read:
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cmp dword [esp+20],1 ; WRITE
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jne fs_noramdisk_write
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mov eax,[esp+4] ; fname
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add eax,2*12+1
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mov ebx,[esp+8] ; buffer
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mov ecx,[esp+12] ; count to write
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mov edx,0 ; create new
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call filesave
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; eax=0 ok - eax=1 not enough free space
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jmp file_system_return
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fs_noramdisk_write:
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fs_noramdisk:
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;********************************************************************
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mov eax,[edi+1]
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cmp eax,'FD '
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je fs_yesflpdisk
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cmp eax,'FLOP'
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jne fs_noflpdisk
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fs_yesflpdisk:
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call reserve_flp
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cmp byte [edi+1+11],0
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je fs_give_dir1
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mov eax,[edi+1+12]
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cmp eax,'1 '
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je fs_yesflpdisk_first
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cmp eax,'FIRS'
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je fs_yesflpdisk_first
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cmp eax,'2 '
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je fs_yesflpdisk_second
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cmp eax,'SECO'
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jne fs_noflpdisk
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jmp fs_yesflpdisk_second
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fs_yesflpdisk_first:
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mov [flp_number],1
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jmp fs_yesflpdisk_start
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fs_yesflpdisk_second:
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mov [flp_number],2
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fs_yesflpdisk_start:
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cmp dword [esp+20],0 ; READ
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jne fs_noflpdisk_read
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mov eax,[esp+4] ; fname
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add eax,2*12+1
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mov ebx,[esp+16] ; block start
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inc ebx
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mov ecx,[esp+12] ; block count
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mov edx,[esp+8] ; return
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mov esi,[esp+0]
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sub esi,eax
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add esi,12+1 ; file name length
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call floppy_fileread
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jmp file_system_return
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fs_noflpdisk_read:
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cmp dword [esp+20],1 ; WRITE
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jne fs_noflpdisk_write
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mov eax,[esp+4] ; fname
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add eax,2*12+1
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mov ebx,[esp+8] ; buffer
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mov ecx,[esp+12] ; count to write
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mov edx,0 ; create new
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call floppy_filesave
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; eax=0 ok - eax=1 not enough free space
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jmp file_system_return
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fs_noflpdisk_write:
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fs_noflpdisk:
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;*****************************************************************
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mov eax,[edi+1]
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cmp eax,'HD0 '
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je fs_yesharddisk_IDE0
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cmp eax,'HD1 '
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je fs_yesharddisk_IDE1
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cmp eax,'HD2 '
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je fs_yesharddisk_IDE2
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cmp eax,'HD3 '
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je fs_yesharddisk_IDE3
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jmp old_path_harddisk
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fs_yesharddisk_IDE0:
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call reserve_hd1
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mov [hdbase],0x1f0
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mov [hdid],0x0
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mov [hdpos],1
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jmp fs_yesharddisk_partition
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fs_yesharddisk_IDE1:
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call reserve_hd1
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mov [hdbase],0x1f0
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mov [hdid],0x10
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mov [hdpos],2
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jmp fs_yesharddisk_partition
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fs_yesharddisk_IDE2:
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call reserve_hd1
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mov [hdbase],0x170
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mov [hdid],0x0
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mov [hdpos],3
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jmp fs_yesharddisk_partition
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fs_yesharddisk_IDE3:
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call reserve_hd1
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mov [hdbase],0x170
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mov [hdid],0x10
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mov [hdpos],4
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fs_yesharddisk_partition:
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call reserve_hd_channel
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; call choice_necessity_partition
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; jmp fs_yesharddisk_all
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jmp fs_for_new_semantic
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choice_necessity_partition:
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mov eax,[edi+1+12]
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call StringToNumber
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mov [fat32part],eax
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choice_necessity_partition_1:
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mov ecx,[hdpos]
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xor eax,eax
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mov [0xfe10], eax ; entries in hd cache
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mov edx,0x40002
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search_partition_array:
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mov bl,[edx]
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movzx ebx,bl
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add eax,ebx
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inc edx
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loop search_partition_array
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sub eax,ebx
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add eax,[fat32part]
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dec eax
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xor edx,edx
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imul eax,100
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add eax,0x4000a
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mov [transfer_adress],eax
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call partition_data_transfer_1
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ret
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old_path_harddisk:
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mov eax,[edi+1]
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cmp eax,'HD '
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je fs_yesharddisk
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cmp eax,'HARD'
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jne fs_noharddisk
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fs_yesharddisk:
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cmp dword [esp+20],8 ; LBA read
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jne fs_no_LBA_read
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mov eax,[esp+16] ; LBA block to read
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lea ebx,[edi+1+12] ; pointer to FIRST/SECOND/THIRD/FOURTH
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mov ecx,[esp+8] ; abs pointer to return area
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call LBA_read
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jmp file_system_return
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fs_no_LBA_read:
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cmp byte [edi+1+11],0 ; directory read
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je fs_give_dir1
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call reserve_hd1
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fs_for_new_semantic:
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call choice_necessity_partition
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fs_yesharddisk_all:
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mov eax,1
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mov ebx, [esp+24+24]
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cmp [hdpos],0 ; is hd base set?
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jz hd_err_return
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cmp [fat32part],0 ; is partition set?
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jnz @f
|
||
hd_err_return:
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call free_hd_channel
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and [hd1_status], 0
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jmp file_system_return
|
||
@@:
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||
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cmp dword [esp+20],0 ; READ
|
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jne fs_noharddisk_read
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mov eax,[esp+0] ; /fname
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lea edi,[eax+12]
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||
mov byte [eax],0 ; path to asciiz
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inc eax ; filename start
|
||
|
||
mov ebx,[esp+12] ; count to read
|
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mov ecx,[esp+8] ; buffer
|
||
mov edx,[esp+4]
|
||
add edx,12*2 ; dir start
|
||
sub edi,edx ; path length
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||
mov esi,[esp+16] ; blocks to read
|
||
|
||
call file_read
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||
|
||
mov edi,[esp+0]
|
||
mov byte [edi],'/'
|
||
|
||
call free_hd_channel
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||
and [hd1_status], 0
|
||
jmp file_system_return
|
||
|
||
fs_noharddisk_read:
|
||
|
||
|
||
cmp dword [esp+20],1 ; WRITE
|
||
jne fs_noharddisk_write
|
||
|
||
mov eax,[esp+0] ; /fname
|
||
mov byte [eax],0 ; path to asciiz
|
||
inc eax ; filename start
|
||
|
||
mov ebx,[esp+12] ; count to write
|
||
mov ecx,[esp+8] ; buffer
|
||
mov edx,[esp+4]
|
||
add edx,12*2 ; path start
|
||
|
||
call file_write
|
||
|
||
mov edi,[esp+0]
|
||
mov byte [edi],'/'
|
||
|
||
; eax=0 ok - eax=1 not enough free space
|
||
|
||
call free_hd_channel
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||
and [hd1_status], 0
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||
jmp file_system_return
|
||
|
||
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||
fs_noharddisk_write:
|
||
|
||
|
||
call free_hd_channel
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||
and [hd1_status], 0
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||
|
||
fs_noharddisk:
|
||
; \begin{diamond}[18.03.2006]
|
||
mov eax, 5 ; file not found
|
||
; <EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD>, <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>?
|
||
mov ebx, [esp+24+24] ; do not change ebx in application
|
||
; \end{diamond}[18.03.2006]
|
||
|
||
file_system_return:
|
||
|
||
add esp,24
|
||
|
||
mov [esp+36],eax
|
||
mov [esp+24],ebx
|
||
ret
|
||
|
||
|
||
fs_give_dir1:
|
||
|
||
; \begin{diamond}[18.03.2006]
|
||
; /RD,/FD,/HD - only read is allowed
|
||
; other operations return "access denied", eax=10
|
||
; (execute operation returns eax=-10)
|
||
cmp dword [esp+20], 0
|
||
jz .read
|
||
add esp, 20
|
||
pop ecx
|
||
mov dword [esp+36], 10
|
||
ret
|
||
.read:
|
||
; \end{diamond}[18.03.2006]
|
||
mov al,0x10
|
||
mov ebx,1
|
||
mov edi,[esp+8]
|
||
mov esi,dir1
|
||
fs_d1_new:
|
||
mov ecx,11
|
||
; cld
|
||
rep movsb
|
||
stosb
|
||
add edi,32-11-1
|
||
dec ebx
|
||
jne fs_d1_new
|
||
|
||
add esp,24
|
||
|
||
and dword [esp+36],0 ; ok read
|
||
mov dword [esp+24],32*1 ; dir/data size
|
||
ret
|
||
|
||
|
||
|
||
LBA_read_ramdisk:
|
||
|
||
cmp [lba_read_enabled],1
|
||
je lbarrl1
|
||
|
||
xor ebx,ebx
|
||
mov eax,2
|
||
ret
|
||
|
||
lbarrl1:
|
||
|
||
cmp eax,18*2*80
|
||
jb lbarrl2
|
||
xor ebx,ebx
|
||
mov eax,3
|
||
ret
|
||
|
||
lbarrl2:
|
||
|
||
pushad
|
||
|
||
call restorefatchain
|
||
|
||
mov edi,ecx
|
||
mov esi,eax
|
||
|
||
shl esi,9
|
||
add esi,RAMDISK
|
||
mov ecx,512/4
|
||
; cld
|
||
rep movsd
|
||
|
||
popad
|
||
|
||
xor ebx,ebx
|
||
xor eax,eax
|
||
ret
|
||
|
||
LBA_read:
|
||
|
||
; IN:
|
||
;
|
||
; eax = LBA block to read
|
||
; ebx = pointer to FIRST/SECOND/THIRD/FOURTH
|
||
; ecx = abs pointer to return area
|
||
|
||
cmp [lba_read_enabled],1
|
||
je lbarl1
|
||
mov eax,2
|
||
ret
|
||
|
||
lbarl1:
|
||
|
||
call reserve_hd1
|
||
|
||
push eax
|
||
push ecx
|
||
|
||
mov edi,hd_address_table
|
||
mov esi,dir1
|
||
mov eax,[ebx]
|
||
mov edx,'1 '
|
||
mov ecx,4
|
||
blar0:
|
||
cmp eax,[esi]
|
||
je blar2
|
||
cmp eax,edx
|
||
je blar2
|
||
inc edx
|
||
add edi,8
|
||
add esi,11
|
||
dec ecx
|
||
jnz blar0
|
||
|
||
mov eax,1
|
||
mov ebx,1
|
||
jmp LBA_read_ret
|
||
|
||
blar2:
|
||
mov eax,[edi+0]
|
||
mov ebx,[edi+4]
|
||
|
||
mov [hdbase],eax
|
||
mov [hdid],ebx
|
||
|
||
call wait_for_hd_idle
|
||
cmp [hd_error],0
|
||
jne hd_lba_error
|
||
|
||
; eax = hd port
|
||
; ebx = set for primary (0x00) or slave (0x10)
|
||
|
||
cli
|
||
|
||
mov edx,eax
|
||
inc edx
|
||
xor eax,eax
|
||
out dx,al
|
||
inc edx
|
||
inc eax
|
||
out dx,al
|
||
inc edx
|
||
mov eax,[esp+4]
|
||
out dx,al
|
||
shr eax,8
|
||
inc edx
|
||
out dx,al
|
||
shr eax,8
|
||
inc edx
|
||
out dx,al
|
||
shr eax,8
|
||
inc edx
|
||
and al,1+2+4+8
|
||
add al,bl
|
||
add al,128+64+32
|
||
out dx,al
|
||
|
||
inc edx
|
||
mov al,20h
|
||
out dx,al
|
||
|
||
sti
|
||
|
||
call wait_for_sector_buffer
|
||
cmp [hd_error],0
|
||
jne hd_lba_error
|
||
|
||
cli
|
||
|
||
mov edi,[esp+0]
|
||
mov ecx,256
|
||
sub edx,7
|
||
cld
|
||
rep insw
|
||
|
||
sti
|
||
|
||
xor eax,eax
|
||
xor ebx,ebx
|
||
|
||
LBA_read_ret:
|
||
mov [hd_error],0
|
||
mov [hd1_status],0
|
||
add esp,2*4
|
||
|
||
ret
|
||
|
||
|
||
expand_pathz:
|
||
; IN:
|
||
; esi = asciiz path & file
|
||
; edi = buffer for path & file name
|
||
; OUT:
|
||
; edi = directory & file : / 11 + / 11 + / 11 - zero terminated
|
||
; ebx = /file name - zero terminated
|
||
; esi = pointer after source
|
||
|
||
push eax
|
||
push ecx
|
||
push edi ;[esp+0]
|
||
|
||
pathz_start:
|
||
mov byte [edi],'/'
|
||
inc edi
|
||
mov al,32
|
||
mov ecx,11
|
||
cld
|
||
rep stosb ; clear filename area
|
||
sub edi,11
|
||
mov ebx,edi ; start of dir/file name
|
||
|
||
pathz_new_char:
|
||
mov al,[esi]
|
||
inc esi
|
||
cmp al,0
|
||
je pathz_end
|
||
|
||
cmp al,'/'
|
||
jne pathz_not_path
|
||
cmp edi,ebx ; skip first '/'
|
||
jz pathz_new_char
|
||
lea edi,[ebx+11] ; start of next directory
|
||
jmp pathz_start
|
||
|
||
pathz_not_path:
|
||
cmp al,'.'
|
||
jne pathz_not_ext
|
||
lea edi,[ebx+8] ; start of extension
|
||
jmp pathz_new_char
|
||
|
||
pathz_not_ext:
|
||
cmp al,'a'
|
||
jb pathz_not_low
|
||
cmp al,'z'
|
||
ja pathz_not_low
|
||
sub al,0x20 ; char to uppercase
|
||
|
||
pathz_not_low:
|
||
mov [edi],al
|
||
inc edi
|
||
mov eax,[esp+0] ; start_of_dest_path
|
||
add eax,512 ; keep maximum path under 512 bytes
|
||
cmp edi,eax
|
||
jb pathz_new_char
|
||
|
||
pathz_end:
|
||
cmp ebx,edi ; if path end with '/'
|
||
jnz pathz_put_zero ; go back 1 level
|
||
sub ebx,12
|
||
|
||
pathz_put_zero:
|
||
mov byte [ebx+11],0
|
||
dec ebx ; include '/' char into file name
|
||
pop edi
|
||
pop ecx
|
||
pop eax
|
||
ret
|
||
|
||
;*******************************************
|
||
;* string to number
|
||
;* input eax - 4 byte string
|
||
;* output eax - number
|
||
;*******************************************
|
||
StringToNumber:
|
||
; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD>
|
||
; <EFBFBD><EFBFBD><EFBFBD><EFBFBD>:
|
||
; EDI - <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>. <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 0Dh
|
||
; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>:
|
||
; CF - <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>:
|
||
; 0 - <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD>;
|
||
; 1 - <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||
; <EFBFBD><EFBFBD><EFBFBD><EFBFBD> CF=0, <EFBFBD><EFBFBD> AX - <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>.
|
||
|
||
push bx
|
||
push cx
|
||
push dx
|
||
push edi
|
||
mov [partition_string],eax
|
||
mov edi,partition_string
|
||
xor cx,cx
|
||
i1:
|
||
mov al,[edi]
|
||
cmp al,32 ;13
|
||
je i_exit
|
||
; cmp al,'0'
|
||
; jb err
|
||
; cmp al,'9'
|
||
; ja err
|
||
sub al,48
|
||
shl cx,1
|
||
jc err
|
||
mov bx,cx
|
||
shl cx,1
|
||
jc err
|
||
shl cx,1
|
||
jc err
|
||
add cx,bx
|
||
jc err
|
||
cbw
|
||
add cx,ax
|
||
jc err
|
||
i3:
|
||
inc edi
|
||
jmp i1
|
||
i_exit:
|
||
mov ax,cx
|
||
clc
|
||
i4:
|
||
movzx eax,ax
|
||
pop edi
|
||
pop dx
|
||
pop cx
|
||
pop bx
|
||
ret
|
||
|
||
err:
|
||
stc
|
||
jmp i4
|
||
|
||
partition_string: dd 0
|
||
db 32
|