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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