| 918,6 → 918,12 |
|---|
| stc |
| ret |
| |
| uglobal |
| ; this is for delete support |
| rd_prev_sector dd ? |
| rd_prev_prev_sector dd ? |
| endg |
| |
| ramdisk_notroot_next: |
| add edi, 0x20 |
| test edi, 0x1FF |
| 926,6 → 932,9 |
|---|
| ramdisk_notroot_next_sector: |
| push ecx |
| mov ecx, [eax] |
| push [rd_prev_sector] |
| pop [rd_prev_prev_sector] |
| mov [rd_prev_sector], ecx |
| mov ecx, [ecx*2+0x280000] |
| and ecx, 0xFFF |
| cmp ecx, 2849 |
| 2289,4 → 2298,107 |
|---|
| mov eax, 6 |
| ret |
| |
| ;---------------------------------------------------------------- |
| ; |
| ; fs_RamdiskDelete - delete file or empty folder from ramdisk |
| ; |
| ; esi points to filename |
| ; |
| ; ret eax = 0 ok or other = errormsg |
| ; |
| ;-------------------------------------------------------------- |
| fs_RamdiskDelete: |
| cmp byte [esi], 0 |
| jnz @f |
| ; cannot delete root! |
| .access_denied: |
| push ERROR_ACCESS_DENIED |
| .pop_ret: |
| pop eax |
| ret |
| @@: |
| and [rd_prev_sector], 0 |
| and [rd_prev_prev_sector], 0 |
| push edi |
| call rd_find_lfn |
| jnc .found |
| pop edi |
| push ERROR_FILE_NOT_FOUND |
| jmp .pop_ret |
| .found: |
| cmp dword [edi], '. ' |
| jz .access_denied2 |
| cmp dword [edi], '.. ' |
| jz .access_denied2 |
| test byte [edi+11], 10h |
| jz .dodel |
| ; we can delete only empty folders! |
| movzx eax, word [edi+26] |
| push ebx |
| mov ebx, eax |
| shl ebx, 9 |
| add ebx, RAMDISK + 31*0x200 + 2*0x20 |
| .checkempty: |
| cmp byte [ebx], 0 |
| jz .empty |
| cmp byte [ebx], 0xE5 |
| jnz .notempty |
| add ebx, 0x20 |
| test ebx, 0x1FF |
| jnz .checkempty |
| movzx eax, word [RAMDISK_FAT + eax*2] |
| test eax, eax |
| jz .empty |
| mov ebx, eax |
| shl ebx, 9 |
| add ebx, RAMDISK + 31*0x200 |
| jmp .checkempty |
| .notempty: |
| pop ebx |
| .access_denied2: |
| pop edi |
| jmp .access_denied |
| .empty: |
| pop ebx |
| .dodel: |
| movzx eax, word [edi+26] |
| ; delete folder entry |
| mov byte [edi], 0xE5 |
| ; delete LFN (if present) |
| .lfndel: |
| test edi, 0x1FF |
| jnz @f |
| cmp [rd_prev_sector], 0 |
| jz @f |
| cmp [rd_prev_sector], -1 |
| jz .lfndone |
| mov edi, [rd_prev_sector] |
| push [rd_prev_prev_sector] |
| pop [rd_prev_sector] |
| or [rd_prev_prev_sector], -1 |
| shl edi, 9 |
| add edi, RAMDISK + 31*0x200 + 0x200 |
| @@: |
| sub edi, 0x20 |
| cmp byte [edi], 0xE5 |
| jz .lfndone |
| cmp byte [edi+11], 0xF |
| jnz .lfndone |
| mov byte [edi], 0xE5 |
| jmp .lfndel |
| .lfndone: |
| ; delete FAT chain |
| test eax, eax |
| jz .done |
| lea eax, [RAMDISK_FAT + eax*2] |
| push dword [eax] |
| and word [eax], 0 |
| pop eax |
| and eax, 0xFFF |
| jmp .lfndone |
| .done: |
| pop edi |
| xor eax, eax |
| ret |
| |
| ; \end{diamond} |