| 1874,11 → 1874,7 |
|---|
| .l1: |
| ; now edi points to direntry, ebx=start byte to write, |
| ; ecx=number of bytes to write, edx=data pointer |
| call get_time_for_file |
| mov [edi+22], ax ; last write time |
| call get_date_for_file |
| mov [edi+24], ax ; last write date |
| mov [edi+18], ax ; last access date |
| call fat_update_datetime |
| |
| ; extend file if needed |
| add ecx, ebx |
| 1948,7 → 1944,7 |
|---|
| |
| ; extends file on ramdisk to given size, new data area is filled by 0 |
| ; in: edi->direntry, ecx=new size |
| ; out: CF=0 => OK, eax destroyed |
| ; out: CF=0 => OK, eax=0 |
| ; CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL) |
| ramdisk_extend_file: |
| push ecx |
| 2036,7 → 2032,7 |
|---|
| .extend_done: |
| mov [edi+28], ecx |
| pop esi edx |
| clc |
| xor eax, eax ; CF=0 |
| ret |
| .disk_full: |
| pop edi ecx |
| 2046,6 → 2042,120 |
|---|
| pop eax |
| ret |
| |
| fat_update_datetime: |
| call get_time_for_file |
| mov [edi+22], ax ; last write time |
| call get_date_for_file |
| mov [edi+24], ax ; last write date |
| mov [edi+18], ax ; last access date |
| ret |
| |
| ;---------------------------------------------------------------- |
| ; |
| ; fs_RamdiskSetFileEnd - set end of file on ramdisk |
| ; |
| ; esi points to filename |
| ; ebx points to 64-bit number = new file size |
| ; ecx ignored (reserved) |
| ; edx ignored (reserved) |
| ; |
| ; ret eax = 0 ok or other = errormsg |
| ; |
| ;-------------------------------------------------------------- |
| fs_RamdiskSetFileEnd: |
| cmp byte [esi], 0 |
| jnz @f |
| .access_denied: |
| push ERROR_ACCESS_DENIED |
| jmp .ret |
| @@: |
| push edi |
| call rd_find_lfn |
| jnc @f |
| pop edi |
| push ERROR_FILE_NOT_FOUND |
| .ret: |
| pop eax |
| ret |
| @@: |
| ; must not be directory |
| test byte [edi+11], 10h |
| jz @f |
| pop edi |
| jmp .access_denied |
| @@: |
| ; file size must not exceed 4Gb |
| cmp dword [ebx+4], 0 |
| jz @f |
| pop edi |
| push ERROR_END_OF_FILE |
| jmp .ret |
| @@: |
| ; set file modification date/time to current |
| call fat_update_datetime |
| mov eax, [ebx] |
| cmp eax, [edi+28] |
| jb .truncate |
| ja .expand |
| pop edi |
| xor eax, eax |
| ret |
| .expand: |
| push ecx |
| mov ecx, eax |
| call ramdisk_extend_file |
| pop ecx |
| pop edi |
| ret |
| .truncate: |
| mov [edi+28], eax |
| push ecx |
| movzx ecx, word [edi+26] |
| test eax, eax |
| jz .zero_size |
| ; find new last sector |
| @@: |
| sub eax, 0x200 |
| jbe @f |
| movzx ecx, word [0x280000+ecx*2] |
| jmp @b |
| @@: |
| ; zero data at the end of last sector |
| push ecx |
| mov edi, ecx |
| shl edi, 9 |
| lea edi, [edi+0x100000+31*512+eax+0x200] |
| mov ecx, eax |
| neg ecx |
| xor eax, eax |
| rep stosb |
| pop ecx |
| ; terminate FAT chain |
| lea ecx, [0x280000+ecx+ecx] |
| push dword [ecx] |
| mov word [ecx], 0xFFF |
| pop ecx |
| and ecx, 0xFFF |
| jmp .delete |
| .zero_size: |
| and word [edi+26], 0 |
| .delete: |
| ; delete FAT chain starting with ecx |
| ; mark all clusters as free |
| cmp ecx, 0xFF8 |
| jae .deleted |
| lea ecx, [0x280000+ecx+ecx] |
| push dword [ecx] |
| and word [ecx], 0 |
| pop ecx |
| and ecx, 0xFFF |
| jmp .delete |
| .deleted: |
| pop ecx |
| pop edi |
| xor eax, eax |
| ret |
| |
| fs_RamdiskGetFileInfo: |
| cmp byte [esi], 0 |
| jnz @f |