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Rev 131 Rev 133
Line 1872... Line 1872...
1872
@@:
1872
@@:
1873
        mov     ebx, [ebx]
1873
        mov     ebx, [ebx]
1874
.l1:
1874
.l1:
1875
; now edi points to direntry, ebx=start byte to write,
1875
; now edi points to direntry, ebx=start byte to write,
1876
; ecx=number of bytes to write, edx=data pointer
1876
; ecx=number of bytes to write, edx=data pointer
1877
        call    get_time_for_file
-
 
1878
        mov     [edi+22], ax            ; last write time
-
 
1879
        call    get_date_for_file
1877
        call    fat_update_datetime
1880
        mov     [edi+24], ax            ; last write date
-
 
1881
        mov     [edi+18], ax            ; last access date
-
 
Line 1882... Line 1878...
1882
 
1878
 
1883
; extend file if needed
1879
; extend file if needed
1884
        add     ecx, ebx
1880
        add     ecx, ebx
1885
        jc      .eof    ; FAT does not support files larger than 4GB
1881
        jc      .eof    ; FAT does not support files larger than 4GB
Line 1946... Line 1942...
1946
        xor     eax, eax
1942
        xor     eax, eax
1947
        jmp     ramdisk_extend_file.start_extend
1943
        jmp     ramdisk_extend_file.start_extend
Line 1948... Line 1944...
1948
 
1944
 
1949
; extends file on ramdisk to given size, new data area is filled by 0
1945
; extends file on ramdisk to given size, new data area is filled by 0
1950
; in: edi->direntry, ecx=new size
1946
; in: edi->direntry, ecx=new size
1951
; out: CF=0 => OK, eax destroyed
1947
; out: CF=0 => OK, eax=0
1952
;      CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL)
1948
;      CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL)
1953
ramdisk_extend_file:
1949
ramdisk_extend_file:
1954
        push    ecx
1950
        push    ecx
1955
; find the last cluster of file
1951
; find the last cluster of file
Line 2034... Line 2030...
2034
        add     dword [edi+28], 0x200
2030
        add     dword [edi+28], 0x200
2035
        jmp     .extend_loop
2031
        jmp     .extend_loop
2036
.extend_done:
2032
.extend_done:
2037
        mov     [edi+28], ecx
2033
        mov     [edi+28], ecx
2038
        pop     esi edx
2034
        pop     esi edx
2039
        clc
2035
        xor     eax, eax        ; CF=0
2040
        ret
2036
        ret
2041
.disk_full:
2037
.disk_full:
2042
        pop     edi ecx
2038
        pop     edi ecx
2043
        pop     esi edx
2039
        pop     esi edx
2044
        stc
2040
        stc
2045
        push    ERROR_DISK_FULL
2041
        push    ERROR_DISK_FULL
2046
        pop     eax
2042
        pop     eax
2047
        ret
2043
        ret
Line -... Line 2044...
-
 
2044
 
-
 
2045
fat_update_datetime:
-
 
2046
        call    get_time_for_file
-
 
2047
        mov     [edi+22], ax            ; last write time
-
 
2048
        call    get_date_for_file
-
 
2049
        mov     [edi+24], ax            ; last write date
-
 
2050
        mov     [edi+18], ax            ; last access date
-
 
2051
        ret
-
 
2052
 
-
 
2053
;----------------------------------------------------------------
-
 
2054
;
-
 
2055
;  fs_RamdiskSetFileEnd - set end of file on ramdisk
-
 
2056
;
-
 
2057
;  esi  points to filename
-
 
2058
;  ebx  points to 64-bit number = new file size
-
 
2059
;  ecx  ignored (reserved)
-
 
2060
;  edx  ignored (reserved)
-
 
2061
;
-
 
2062
;  ret eax = 0 ok or other = errormsg
-
 
2063
;
-
 
2064
;--------------------------------------------------------------
-
 
2065
fs_RamdiskSetFileEnd:
-
 
2066
        cmp     byte [esi], 0
-
 
2067
        jnz     @f
-
 
2068
.access_denied:
-
 
2069
        push    ERROR_ACCESS_DENIED
-
 
2070
        jmp     .ret
-
 
2071
@@:
-
 
2072
        push    edi
-
 
2073
        call    rd_find_lfn
-
 
2074
        jnc     @f
-
 
2075
        pop     edi
-
 
2076
        push    ERROR_FILE_NOT_FOUND
-
 
2077
.ret:
-
 
2078
        pop     eax
-
 
2079
        ret
-
 
2080
@@:
-
 
2081
; must not be directory
-
 
2082
        test    byte [edi+11], 10h
-
 
2083
        jz      @f
-
 
2084
        pop     edi
-
 
2085
        jmp     .access_denied
-
 
2086
@@:
-
 
2087
; file size must not exceed 4Gb
-
 
2088
        cmp     dword [ebx+4], 0
-
 
2089
        jz      @f
-
 
2090
        pop     edi
-
 
2091
        push    ERROR_END_OF_FILE
-
 
2092
        jmp     .ret
-
 
2093
@@:
-
 
2094
; set file modification date/time to current
-
 
2095
        call    fat_update_datetime
-
 
2096
        mov     eax, [ebx]
-
 
2097
        cmp     eax, [edi+28]
-
 
2098
        jb      .truncate
-
 
2099
        ja      .expand
-
 
2100
        pop     edi
-
 
2101
        xor     eax, eax
-
 
2102
        ret
-
 
2103
.expand:
-
 
2104
        push    ecx
-
 
2105
        mov     ecx, eax
-
 
2106
        call    ramdisk_extend_file
-
 
2107
        pop     ecx
-
 
2108
        pop     edi
-
 
2109
        ret
-
 
2110
.truncate:
-
 
2111
        mov     [edi+28], eax
-
 
2112
        push    ecx
-
 
2113
        movzx   ecx, word [edi+26]
-
 
2114
        test    eax, eax
-
 
2115
        jz      .zero_size
-
 
2116
; find new last sector
-
 
2117
@@:
-
 
2118
        sub     eax, 0x200
-
 
2119
        jbe     @f
-
 
2120
        movzx   ecx, word [0x280000+ecx*2]
-
 
2121
        jmp     @b
-
 
2122
@@:
-
 
2123
; zero data at the end of last sector
-
 
2124
        push    ecx
-
 
2125
        mov     edi, ecx
-
 
2126
        shl     edi, 9
-
 
2127
        lea     edi, [edi+0x100000+31*512+eax+0x200]
-
 
2128
        mov     ecx, eax
-
 
2129
        neg     ecx
-
 
2130
        xor     eax, eax
-
 
2131
        rep     stosb
-
 
2132
        pop     ecx
-
 
2133
; terminate FAT chain
-
 
2134
        lea     ecx, [0x280000+ecx+ecx]
-
 
2135
        push    dword [ecx]
-
 
2136
        mov     word [ecx], 0xFFF
-
 
2137
        pop     ecx
-
 
2138
        and     ecx, 0xFFF
-
 
2139
        jmp     .delete
-
 
2140
.zero_size:
-
 
2141
        and     word [edi+26], 0
-
 
2142
.delete:
-
 
2143
; delete FAT chain starting with ecx
-
 
2144
; mark all clusters as free
-
 
2145
        cmp     ecx, 0xFF8
-
 
2146
        jae     .deleted
-
 
2147
        lea     ecx, [0x280000+ecx+ecx]
-
 
2148
        push    dword [ecx]
-
 
2149
        and     word [ecx], 0
-
 
2150
        pop     ecx
-
 
2151
        and     ecx, 0xFFF
-
 
2152
        jmp     .delete
-
 
2153
.deleted:
-
 
2154
        pop     ecx
-
 
2155
        pop     edi
-
 
2156
        xor     eax, eax
-
 
2157
        ret
2048
 
2158
 
2049
fs_RamdiskGetFileInfo:
2159
fs_RamdiskGetFileInfo:
2050
        cmp     byte [esi], 0
2160
        cmp     byte [esi], 0
2051
        jnz     @f
2161
        jnz     @f
2052
        mov     eax, 2  ; unsupported
2162
        mov     eax, 2  ; unsupported