Rev 1504 | Rev 2455 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
2288 | clevermous | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
||
3 | ;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;; |
||
4 | ;; Distributed under terms of the GNU General Public License ;; |
||
5 | ;; ;; |
||
6 | ;; RAMDISK functions ;; |
||
7 | ;; (C) 2004 Ville Turjanmaa, License: GPL ;; |
||
8 | ;; Addings by M.Lisovin ;; |
||
9 | ;; LFN support by diamond ;; |
||
10 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
||
11 | |||
12 | $Revision: 2288 $ |
||
13 | |||
14 | |||
15 | ; calculate fat chain |
||
16 | |||
17 | calculatefatchain: |
||
18 | |||
19 | pushad |
||
20 | |||
21 | mov esi, RAMDISK+512 |
||
22 | mov edi, RAMDISK_FAT |
||
23 | |||
24 | fcnew: |
||
25 | mov eax, dword [esi] |
||
26 | mov ebx, dword [esi+4] |
||
27 | mov ecx, dword [esi+8] |
||
28 | mov edx, ecx |
||
29 | shr edx, 4;8 ok |
||
30 | shr dx, 4;7 ok |
||
31 | xor ch, ch |
||
32 | shld ecx, ebx, 20;6 ok |
||
33 | shr cx, 4;5 ok |
||
34 | shld ebx, eax, 12 |
||
35 | and ebx, 0x0fffffff;4 ok |
||
36 | shr bx, 4;3 ok |
||
37 | shl eax, 4 |
||
38 | and eax, 0x0fffffff;2 ok |
||
39 | shr ax, 4;1 ok |
||
40 | mov dword [edi], eax |
||
41 | mov dword [edi+4], ebx |
||
42 | mov dword [edi+8], ecx |
||
43 | mov dword [edi+12], edx |
||
44 | add edi, 16 |
||
45 | add esi, 12 |
||
46 | |||
47 | cmp edi, RAMDISK_FAT+2856*2;2849 clusters |
||
48 | jnz fcnew |
||
49 | |||
50 | popad |
||
51 | ret |
||
52 | |||
53 | |||
54 | restorefatchain: ; restore fat chain |
||
55 | |||
56 | pushad |
||
57 | |||
58 | mov esi, RAMDISK_FAT |
||
59 | mov edi, RAMDISK+512 |
||
60 | |||
61 | fcnew2: |
||
62 | mov eax, dword [esi] |
||
63 | mov ebx, dword [esi+4] |
||
64 | shl ax, 4 |
||
65 | shl eax, 4 |
||
66 | shl bx, 4 |
||
67 | shr ebx, 4 |
||
68 | shrd eax, ebx, 8 |
||
69 | shr ebx, 8 |
||
70 | mov dword [edi], eax |
||
71 | mov word [edi+4], bx |
||
72 | add edi, 6 |
||
73 | add esi, 8 |
||
74 | |||
75 | cmp edi, RAMDISK+512+4278;4274 bytes - all used FAT |
||
76 | jb fcnew2 |
||
77 | |||
78 | mov esi, RAMDISK+512 ; duplicate fat chain |
||
79 | mov edi, RAMDISK+512+0x1200 |
||
80 | mov ecx, 1069;4274/4 |
||
81 | cld |
||
82 | rep movsd |
||
83 | |||
84 | popad |
||
85 | ret |
||
86 | |||
87 | |||
88 | ramdisk_free_space: |
||
89 | ;--------------------------------------------- |
||
90 | ; |
||
91 | ; returns free space in edi |
||
92 | ; rewr.by Mihasik |
||
93 | ;--------------------------------------------- |
||
94 | |||
95 | push eax ebx ecx |
||
96 | |||
97 | mov edi, RAMDISK_FAT;start of FAT |
||
98 | xor ax, ax;Free cluster=0x0000 in FAT |
||
99 | xor ebx, ebx;counter |
||
100 | mov ecx, 2849;2849 clusters |
||
101 | cld |
||
102 | rdfs1: |
||
103 | repne scasw |
||
104 | jnz rdfs2 ;if last cluster not 0 |
||
105 | inc ebx |
||
106 | test ecx, ecx |
||
107 | jnz rdfs1 |
||
108 | rdfs2: |
||
109 | shl ebx, 9;free clusters*512 |
||
110 | mov edi, ebx |
||
111 | |||
112 | pop ecx ebx eax |
||
113 | ret |
||
114 | |||
115 | |||
116 | expand_filename: |
||
117 | ;--------------------------------------------- |
||
118 | ; |
||
119 | ; exapand filename with '.' to 11 character |
||
120 | ; eax - pointer to filename |
||
121 | ;--------------------------------------------- |
||
122 | |||
123 | push esi edi ebx |
||
124 | |||
125 | mov edi, esp ; check for '.' in the name |
||
126 | add edi, 12+8 |
||
127 | |||
128 | mov esi, eax |
||
129 | |||
130 | mov eax, edi |
||
131 | mov [eax+0], dword ' ' |
||
132 | mov [eax+4], dword ' ' |
||
133 | mov [eax+8], dword ' ' |
||
134 | |||
135 | flr1: |
||
136 | |||
137 | cmp [esi], byte '.' |
||
138 | jne flr2 |
||
139 | mov edi, eax |
||
140 | add edi, 7 |
||
141 | jmp flr3 |
||
142 | |||
143 | flr2: |
||
144 | |||
145 | mov bl, [esi] |
||
146 | mov [edi], bl |
||
147 | |||
148 | flr3: |
||
149 | |||
150 | inc esi |
||
151 | inc edi |
||
152 | |||
153 | mov ebx, eax |
||
154 | add ebx, 11 |
||
155 | |||
156 | cmp edi, ebx |
||
157 | jbe flr1 |
||
158 | |||
159 | pop ebx edi esi |
||
160 | ret |
||
161 | |||
162 | fileread: |
||
163 | ;---------------------------------------------------------------- |
||
164 | ; |
||
165 | ; fileread - sys floppy |
||
166 | ; |
||
167 | ; eax points to filename 11 chars |
||
168 | ; ebx first wanted block ; 1+ ; if 0 then set to 1 |
||
169 | ; ecx number of blocks to read ; 1+ ; if 0 then set to 1 |
||
170 | ; edx mem location to return data |
||
171 | ; esi length of filename 12*X 0=root |
||
172 | ; |
||
173 | ; ret ebx = size or 0xffffffff file not found |
||
174 | ; eax = 0 ok read or other = errormsg |
||
175 | ; |
||
176 | ;-------------------------------------------------------------- |
||
177 | test ebx, ebx;if ebx=0 - set to 1 |
||
178 | jnz frfl5 |
||
179 | inc ebx |
||
180 | frfl5: |
||
181 | test ecx, ecx;if ecx=0 - set to 1 |
||
182 | jnz frfl6 |
||
183 | inc ecx |
||
184 | frfl6: |
||
185 | test esi, esi ; return ramdisk root |
||
186 | jnz fr_noroot ;if not root |
||
187 | cmp ebx, 14 ;14 clusters=root dir |
||
188 | ja oorr |
||
189 | cmp ecx, 14 |
||
190 | ja oorr |
||
191 | jmp fr_do |
||
192 | oorr: |
||
193 | mov eax, 5 ;out of root range (fnf) |
||
194 | xor ebx, ebx |
||
195 | dec ebx ;0xffffffff |
||
196 | ret |
||
197 | |||
198 | fr_do: ;reading rootdir |
||
199 | mov edi, edx |
||
200 | dec ebx |
||
201 | push edx |
||
202 | mov edx, ecx |
||
203 | add edx, ebx |
||
204 | cmp edx, 15 ;ebx+ecx=14+1 |
||
205 | pushf |
||
206 | jbe fr_do1 |
||
207 | sub edx, 14 |
||
208 | sub ecx, edx |
||
209 | fr_do1: |
||
210 | shl ebx, 9 |
||
211 | mov esi, RAMDISK+512*19 |
||
212 | add esi, ebx |
||
213 | shl ecx, 7 |
||
214 | cld |
||
215 | rep movsd |
||
216 | popf |
||
217 | pop edx |
||
218 | jae fr_do2 |
||
219 | xor eax, eax; ok read |
||
220 | xor ebx, ebx |
||
221 | ret |
||
222 | fr_do2: ;if last cluster |
||
223 | mov eax, 6;end of file |
||
224 | xor ebx, ebx |
||
225 | ret |
||
226 | |||
227 | fr_noroot: |
||
228 | |||
229 | sub esp, 32 |
||
230 | call expand_filename |
||
231 | |||
232 | dec ebx |
||
233 | |||
234 | push eax |
||
235 | |||
236 | push eax ebx ecx edx esi edi |
||
237 | call rd_findfile |
||
238 | je fifound |
||
239 | add esp, 32+28 ;if file not found |
||
240 | ret |
||
241 | |||
242 | fifound: |
||
243 | |||
244 | mov ebx, [edi-11+28] ;file size |
||
245 | mov [esp+20], ebx |
||
246 | mov [esp+24], ebx |
||
247 | add edi, 0xf |
||
248 | movzx eax, word [edi] |
||
249 | mov edi, eax ;edi=cluster |
||
250 | |||
251 | frnew: |
||
252 | |||
253 | add eax, 31 ;bootsector+2*fat+filenames |
||
254 | shl eax, 9 ;*512 |
||
255 | add eax, RAMDISK ;image base |
||
256 | mov ebx, [esp+8] |
||
257 | mov ecx, 512 ;[esp+4] |
||
258 | |||
259 | cmp [esp+16], dword 0 ; wanted cluster ? |
||
260 | jne frfl7 |
||
261 | call memmove |
||
262 | add [esp+8], dword 512 |
||
263 | dec dword [esp+12] ; last wanted cluster ? |
||
264 | je frnoread |
||
265 | jmp frfl8 |
||
266 | frfl7: |
||
267 | dec dword [esp+16] |
||
268 | frfl8: |
||
269 | movzx eax, word [edi*2+RAMDISK_FAT] ; find next cluster from FAT |
||
270 | mov edi, eax |
||
271 | cmp edi, 4095 ;eof - cluster |
||
272 | jz frnoread2 |
||
273 | |||
274 | cmp [esp+24], dword 512 ;eof - size |
||
275 | jb frnoread |
||
276 | sub [esp+24], dword 512 |
||
277 | |||
278 | jmp frnew |
||
279 | |||
280 | frnoread2: |
||
281 | |||
282 | cmp [esp+16], dword 0 ; eof without read ? |
||
283 | je frnoread |
||
284 | |||
285 | pop edi esi edx ecx |
||
286 | add esp, 4 |
||
287 | pop ebx ; ebx <- eax : size of file |
||
288 | add esp, 36 |
||
289 | mov eax, 6 ; end of file |
||
290 | ret |
||
291 | |||
292 | frnoread: |
||
293 | |||
294 | pop edi esi edx ecx |
||
295 | add esp, 4 |
||
296 | pop ebx ; ebx <- eax : size of file |
||
297 | add esp, 36 |
||
298 | xor eax, eax;read ok |
||
299 | ret |
||
300 | |||
301 | |||
302 | |||
303 | rd_findfile: |
||
304 | ;by Mihasik |
||
305 | ;IN: eax - pointer to filename OUT: filestring+11 in edi or notZero in flags and fnf in eax,ebx |
||
306 | |||
307 | mov edi, RAMDISK+512*18+512;Point at directory |
||
308 | cld |
||
309 | rd_newsearch: |
||
310 | mov esi, eax |
||
311 | mov ecx, 11 |
||
312 | rep cmpsb |
||
313 | je rd_ff |
||
314 | add cl, 21 |
||
315 | add edi, ecx |
||
316 | cmp edi, RAMDISK+512*33 |
||
317 | jb rd_newsearch |
||
318 | mov eax, 5 ;if file not found - eax=5 |
||
319 | xor ebx, ebx |
||
320 | dec ebx ;ebx=0xffffffff and zf=0 |
||
321 | rd_ff: |
||
322 | ret |
||
323 | |||
324 | ; \begin{diamond} |
||
325 | |||
326 | uni2ansi_str: |
||
327 | ; convert UNICODE zero-terminated string to ASCII-string (codepage 866) |
||
328 | ; in: esi->source, edi->buffer (may be esi=edi) |
||
329 | ; destroys: eax,esi,edi |
||
330 | lodsw |
||
331 | test ax, ax |
||
332 | jz .done |
||
333 | cmp ax, 0x80 |
||
334 | jb .ascii |
||
335 | cmp ax, 0x401 |
||
336 | jz .yo1 |
||
337 | cmp ax, 0x451 |
||
338 | jz .yo2 |
||
339 | cmp ax, 0x410 |
||
340 | jb .unk |
||
341 | cmp ax, 0x440 |
||
342 | jb .rus1 |
||
343 | cmp ax, 0x450 |
||
344 | jb .rus2 |
||
345 | .unk: |
||
346 | mov al, '_' |
||
347 | jmp .doit |
||
348 | .yo1: |
||
349 | mov al, 'ð' |
||
350 | jmp .doit |
||
351 | .yo2: |
||
352 | mov al, 'ñ' |
||
353 | jmp .doit |
||
354 | .rus1: |
||
355 | ; 0x410-0x43F -> 0x80-0xAF |
||
356 | add al, 0x70 |
||
357 | jmp .doit |
||
358 | .rus2: |
||
359 | ; 0x440-0x44F -> 0xE0-0xEF |
||
360 | add al, 0xA0 |
||
361 | .ascii: |
||
362 | .doit: |
||
363 | stosb |
||
364 | jmp uni2ansi_str |
||
365 | .done: |
||
366 | mov byte [edi], 0 |
||
367 | ret |
||
368 | |||
369 | ansi2uni_char: |
||
370 | ; convert ANSI character in al to UNICODE character in ax, using cp866 encoding |
||
371 | mov ah, 0 |
||
372 | ; 0x00-0x7F - trivial map |
||
373 | cmp al, 0x80 |
||
374 | jb .ret |
||
375 | ; 0x80-0xAF -> 0x410-0x43F |
||
376 | cmp al, 0xB0 |
||
377 | jae @f |
||
378 | add ax, 0x410-0x80 |
||
379 | .ret: |
||
380 | ret |
||
381 | @@: |
||
382 | ; 0xE0-0xEF -> 0x440-0x44F |
||
383 | cmp al, 0xE0 |
||
384 | jb .unk |
||
385 | cmp al, 0xF0 |
||
386 | jae @f |
||
387 | add ax, 0x440-0xE0 |
||
388 | ret |
||
389 | ; 0xF0 -> 0x401 |
||
390 | ; 0xF1 -> 0x451 |
||
391 | @@: |
||
392 | cmp al, 'ð' |
||
393 | jz .yo1 |
||
394 | cmp al, 'ñ' |
||
395 | jz .yo2 |
||
396 | .unk: |
||
397 | mov al, '_' ; ah=0 |
||
398 | ret |
||
399 | .yo1: |
||
400 | mov ax, 0x401 |
||
401 | ret |
||
402 | .yo2: |
||
403 | mov ax, 0x451 |
||
404 | ret |
||
405 | |||
406 | char_toupper: |
||
407 | ; convert character to uppercase, using cp866 encoding |
||
408 | ; in: al=symbol |
||
409 | ; out: al=converted symbol |
||
410 | cmp al, 'a' |
||
411 | jb .ret |
||
412 | cmp al, 'z' |
||
413 | jbe .az |
||
414 | cmp al, 'ñ' |
||
415 | jz .yo1 |
||
416 | cmp al, ' ' |
||
417 | jb .ret |
||
418 | cmp al, 'à' |
||
419 | jb .rus1 |
||
420 | cmp al, 'ï' |
||
421 | ja .ret |
||
422 | ; 0xE0-0xEF -> 0x90-0x9F |
||
423 | sub al, 'à'-'' |
||
424 | .ret: |
||
425 | ret |
||
426 | .rus1: |
||
427 | ; 0xA0-0xAF -> 0x80-0x8F |
||
428 | .az: |
||
429 | and al, not 0x20 |
||
430 | ret |
||
431 | .yo1: |
||
432 | ; 0xF1 -> 0xF0 |
||
433 | dec ax |
||
434 | ret |
||
435 | |||
436 | fat_get_name: |
||
437 | ; in: edi->FAT entry |
||
438 | ; out: CF=1 - no valid entry |
||
439 | ; else CF=0 and ebp->ASCIIZ-name |
||
440 | ; (maximum length of filename is 255 (wide) symbols without trailing 0, |
||
441 | ; but implementation requires buffer 261 words) |
||
442 | ; destroys eax |
||
443 | cmp byte [edi], 0 |
||
444 | jz .no |
||
445 | cmp byte [edi], 0xE5 |
||
446 | jnz @f |
||
447 | .no: |
||
448 | stc |
||
449 | ret |
||
450 | @@: |
||
451 | cmp byte [edi+11], 0xF |
||
452 | jz .longname |
||
453 | test byte [edi+11], 8 |
||
454 | jnz .no |
||
455 | push ecx |
||
456 | push edi ebp |
||
457 | test byte [ebp-4], 1 |
||
458 | jnz .unicode_short |
||
459 | |||
460 | mov eax, [edi] |
||
461 | mov ecx, [edi+4] |
||
462 | mov [ebp], eax |
||
463 | mov [ebp+4], ecx |
||
464 | |||
465 | mov ecx, 8 |
||
466 | @@: |
||
467 | cmp byte [ebp+ecx-1], ' ' |
||
468 | loope @b |
||
469 | |||
470 | mov eax, [edi+8] |
||
471 | cmp al, ' ' |
||
472 | je .done |
||
473 | shl eax, 8 |
||
474 | mov al, '.' |
||
475 | |||
476 | lea ebp, [ebp+ecx+1] |
||
477 | mov [ebp], eax |
||
478 | mov ecx, 3 |
||
479 | @@: |
||
480 | rol eax, 8 |
||
481 | cmp al, ' ' |
||
482 | jne .done |
||
483 | loop @b |
||
484 | dec ebp |
||
485 | .done: |
||
486 | and byte [ebp+ecx+1], 0 ; CF=0 |
||
487 | pop ebp edi ecx |
||
488 | ret |
||
489 | .unicode_short: |
||
490 | mov ecx, 8 |
||
491 | push ecx |
||
492 | @@: |
||
493 | mov al, [edi] |
||
494 | inc edi |
||
495 | call ansi2uni_char |
||
496 | mov [ebp], ax |
||
497 | inc ebp |
||
498 | inc ebp |
||
499 | loop @b |
||
500 | pop ecx |
||
501 | @@: |
||
502 | cmp word [ebp-2], ' ' |
||
503 | jnz @f |
||
504 | dec ebp |
||
505 | dec ebp |
||
506 | loop @b |
||
507 | @@: |
||
508 | mov word [ebp], '.' |
||
509 | inc ebp |
||
510 | inc ebp |
||
511 | mov ecx, 3 |
||
512 | push ecx |
||
513 | @@: |
||
514 | mov al, [edi] |
||
515 | inc edi |
||
516 | call ansi2uni_char |
||
517 | mov [ebp], ax |
||
518 | inc ebp |
||
519 | inc ebp |
||
520 | loop @b |
||
521 | pop ecx |
||
522 | @@: |
||
523 | cmp word [ebp-2], ' ' |
||
524 | jnz @f |
||
525 | dec ebp |
||
526 | dec ebp |
||
527 | loop @b |
||
528 | dec ebp |
||
529 | dec ebp |
||
530 | @@: |
||
531 | and word [ebp], 0 ; CF=0 |
||
532 | pop ebp edi ecx |
||
533 | ret |
||
534 | .longname: |
||
535 | ; LFN |
||
536 | mov al, byte [edi] |
||
537 | and eax, 0x3F |
||
538 | dec eax |
||
539 | cmp al, 20 |
||
540 | jae .no ; ignore invalid entries |
||
541 | mov word [ebp+260*2], 0 ; force null-terminating for orphans |
||
542 | imul eax, 13*2 |
||
543 | add ebp, eax |
||
544 | test byte [edi], 0x40 |
||
545 | jz @f |
||
546 | mov word [ebp+13*2], 0 |
||
547 | @@: |
||
548 | push eax |
||
549 | ; now copy name from edi to ebp ... |
||
550 | mov eax, [edi+1] |
||
551 | mov [ebp], eax ; symbols 1,2 |
||
552 | mov eax, [edi+5] |
||
553 | mov [ebp+4], eax ; 3,4 |
||
554 | mov eax, [edi+9] |
||
555 | mov [ebp+8], ax ; 5 |
||
556 | mov eax, [edi+14] |
||
557 | mov [ebp+10], eax ; 6,7 |
||
558 | mov eax, [edi+18] |
||
559 | mov [ebp+14], eax ; 8,9 |
||
560 | mov eax, [edi+22] |
||
561 | mov [ebp+18], eax ; 10,11 |
||
562 | mov eax, [edi+28] |
||
563 | mov [ebp+22], eax ; 12,13 |
||
564 | ; ... done |
||
565 | pop eax |
||
566 | sub ebp, eax |
||
567 | test eax, eax |
||
568 | jz @f |
||
569 | ; if this is not first entry, more processing required |
||
570 | stc |
||
571 | ret |
||
572 | @@: |
||
573 | ; if this is first entry: |
||
574 | test byte [ebp-4], 1 |
||
575 | jnz .ret |
||
576 | ; buffer at ebp contains UNICODE name, convert it to ANSI |
||
577 | push esi edi |
||
578 | mov esi, ebp |
||
579 | mov edi, ebp |
||
580 | call uni2ansi_str |
||
581 | pop edi esi |
||
582 | .ret: |
||
583 | clc |
||
584 | ret |
||
585 | |||
586 | fat_compare_name: |
||
587 | ; compares ASCIIZ-names, case-insensitive (cp866 encoding) |
||
588 | ; in: esi->name, ebp->name |
||
589 | ; out: if names match: ZF=1 and esi->next component of name |
||
590 | ; else: ZF=0, esi is not changed |
||
591 | ; destroys eax |
||
592 | push ebp esi |
||
593 | .loop: |
||
594 | mov al, [ebp] |
||
595 | inc ebp |
||
596 | call char_toupper |
||
597 | push eax |
||
598 | lodsb |
||
599 | call char_toupper |
||
600 | cmp al, [esp] |
||
601 | jnz .done |
||
602 | pop eax |
||
603 | test al, al |
||
604 | jnz .loop |
||
605 | dec esi |
||
606 | pop eax |
||
607 | pop ebp |
||
608 | xor eax, eax ; set ZF flag |
||
609 | ret |
||
610 | .done: |
||
611 | cmp al, '/' |
||
612 | jnz @f |
||
613 | cmp byte [esp], 0 |
||
614 | jnz @f |
||
615 | mov [esp+4], esi |
||
616 | @@: |
||
617 | pop eax |
||
618 | pop esi ebp |
||
619 | ret |
||
620 | |||
621 | fat_time_to_bdfe: |
||
622 | ; in: eax=FAT time |
||
623 | ; out: eax=BDFE time |
||
624 | push ecx edx |
||
625 | mov ecx, eax |
||
626 | mov edx, eax |
||
627 | shr eax, 11 |
||
628 | shl eax, 16 ; hours |
||
629 | and edx, 0x1F |
||
630 | add edx, edx |
||
631 | mov al, dl ; seconds |
||
632 | shr ecx, 5 |
||
633 | and ecx, 0x3F |
||
634 | mov ah, cl ; minutes |
||
635 | pop edx ecx |
||
636 | ret |
||
637 | |||
638 | fat_date_to_bdfe: |
||
639 | push ecx edx |
||
640 | mov ecx, eax |
||
641 | mov edx, eax |
||
642 | shr eax, 9 |
||
643 | add ax, 1980 |
||
644 | shl eax, 16 ; year |
||
645 | and edx, 0x1F |
||
646 | mov al, dl ; day |
||
647 | shr ecx, 5 |
||
648 | and ecx, 0xF |
||
649 | mov ah, cl ; month |
||
650 | pop edx ecx |
||
651 | ret |
||
652 | |||
653 | bdfe_to_fat_time: |
||
654 | push edx |
||
655 | mov edx, eax |
||
656 | shr eax, 16 |
||
657 | and dh, 0x3F |
||
658 | shl eax, 6 |
||
659 | or al, dh |
||
660 | shr dl, 1 |
||
661 | and dl, 0x1F |
||
662 | shl eax, 5 |
||
663 | or al, dl |
||
664 | pop edx |
||
665 | ret |
||
666 | |||
667 | bdfe_to_fat_date: |
||
668 | push edx |
||
669 | mov edx, eax |
||
670 | shr eax, 16 |
||
671 | sub ax, 1980 |
||
672 | and dh, 0xF |
||
673 | shl eax, 4 |
||
674 | or al, dh |
||
675 | and dl, 0x1F |
||
676 | shl eax, 5 |
||
677 | or al, dl |
||
678 | pop edx |
||
679 | ret |
||
680 | |||
681 | fat_entry_to_bdfe: |
||
682 | ; convert FAT entry at edi to BDFE (block of data of folder entry) at esi, advance esi |
||
683 | ; destroys eax |
||
684 | mov eax, [ebp-4] |
||
685 | mov [esi+4], eax ; ASCII/UNICODE name |
||
686 | fat_entry_to_bdfe2: |
||
687 | movzx eax, byte [edi+11] |
||
688 | mov [esi], eax ; attributes |
||
689 | movzx eax, word [edi+14] |
||
690 | call fat_time_to_bdfe |
||
691 | mov [esi+8], eax ; creation time |
||
692 | movzx eax, word [edi+16] |
||
693 | call fat_date_to_bdfe |
||
694 | mov [esi+12], eax ; creation date |
||
695 | and dword [esi+16], 0 ; last access time is not supported on FAT |
||
696 | movzx eax, word [edi+18] |
||
697 | call fat_date_to_bdfe |
||
698 | mov [esi+20], eax ; last access date |
||
699 | movzx eax, word [edi+22] |
||
700 | call fat_time_to_bdfe |
||
701 | mov [esi+24], eax ; last write time |
||
702 | movzx eax, word [edi+24] |
||
703 | call fat_date_to_bdfe |
||
704 | mov [esi+28], eax ; last write date |
||
705 | mov eax, [edi+28] |
||
706 | mov [esi+32], eax ; file size (low dword) |
||
707 | xor eax, eax |
||
708 | mov [esi+36], eax ; file size (high dword) |
||
709 | test ebp, ebp |
||
710 | jz .ret |
||
711 | push ecx edi |
||
712 | lea edi, [esi+40] |
||
713 | mov esi, ebp |
||
714 | test byte [esi-4], 1 |
||
715 | jz .ansi |
||
716 | mov ecx, 260/2 |
||
717 | rep movsd |
||
718 | mov [edi-2], ax |
||
719 | @@: |
||
720 | mov esi, edi |
||
721 | pop edi ecx |
||
722 | .ret: |
||
723 | ret |
||
724 | .ansi: |
||
725 | mov ecx, 264/4 |
||
726 | rep movsd |
||
727 | mov [edi-1], al |
||
728 | jmp @b |
||
729 | |||
730 | bdfe_to_fat_entry: |
||
731 | ; convert BDFE at edx to FAT entry at edi |
||
732 | ; destroys eax |
||
733 | ; attributes byte |
||
734 | test byte [edi+11], 8 ; volume label? |
||
735 | jnz @f |
||
736 | mov al, [edx] |
||
737 | and al, 0x27 |
||
738 | and byte [edi+11], 0x10 |
||
739 | or byte [edi+11], al |
||
740 | @@: |
||
741 | mov eax, [edx+8] |
||
742 | call bdfe_to_fat_time |
||
743 | mov [edi+14], ax ; creation time |
||
744 | mov eax, [edx+12] |
||
745 | call bdfe_to_fat_date |
||
746 | mov [edi+16], ax ; creation date |
||
747 | mov eax, [edx+20] |
||
748 | call bdfe_to_fat_date |
||
749 | mov [edi+18], ax ; last access date |
||
750 | mov eax, [edx+24] |
||
751 | call bdfe_to_fat_time |
||
752 | mov [edi+22], ax ; last write time |
||
753 | mov eax, [edx+28] |
||
754 | call bdfe_to_fat_date |
||
755 | mov [edi+24], ax ; last write date |
||
756 | ret |
||
757 | |||
758 | ramdisk_root_first: |
||
759 | mov edi, RAMDISK+512*19 |
||
760 | clc |
||
761 | ret |
||
762 | ramdisk_root_next: |
||
763 | add edi, 0x20 |
||
764 | cmp edi, RAMDISK+512*33 |
||
765 | cmc |
||
766 | ret |
||
767 | |||
768 | ramdisk_root_extend_dir: |
||
769 | stc |
||
770 | ret |
||
771 | |||
772 | uglobal |
||
773 | ; this is for delete support |
||
774 | rd_prev_sector dd ? |
||
775 | rd_prev_prev_sector dd ? |
||
776 | endg |
||
777 | |||
778 | ramdisk_notroot_next: |
||
779 | add edi, 0x20 |
||
780 | test edi, 0x1FF |
||
781 | jz ramdisk_notroot_next_sector |
||
782 | ret ; CF=0 |
||
783 | ramdisk_notroot_next_sector: |
||
784 | push ecx |
||
785 | mov ecx, [eax] |
||
786 | push [rd_prev_sector] |
||
787 | pop [rd_prev_prev_sector] |
||
788 | mov [rd_prev_sector], ecx |
||
789 | mov ecx, [ecx*2+RAMDISK_FAT] |
||
790 | and ecx, 0xFFF |
||
791 | cmp ecx, 2849 |
||
792 | jae ramdisk_notroot_first.err2 |
||
793 | mov [eax], ecx |
||
794 | pop ecx |
||
795 | ramdisk_notroot_first: |
||
796 | mov eax, [eax] |
||
797 | cmp eax, 2 |
||
798 | jb .err |
||
799 | cmp eax, 2849 |
||
800 | jae .err |
||
801 | shl eax, 9 |
||
802 | lea edi, [eax+(31 shl 9)+RAMDISK] |
||
803 | clc |
||
804 | ret |
||
805 | .err2: |
||
806 | pop ecx |
||
807 | .err: |
||
808 | stc |
||
809 | ret |
||
810 | ramdisk_notroot_next_write: |
||
811 | test edi, 0x1FF |
||
812 | jz ramdisk_notroot_next_sector |
||
813 | ramdisk_root_next_write: |
||
814 | ret |
||
815 | |||
816 | ramdisk_notroot_extend_dir: |
||
817 | pusha |
||
818 | xor eax, eax |
||
819 | mov edi, RAMDISK_FAT |
||
820 | mov ecx, 2849 |
||
821 | repnz scasw |
||
822 | jnz .notfound |
||
823 | mov word [edi-2], 0xFFF |
||
824 | sub edi, RAMDISK_FAT |
||
825 | shr edi, 1 |
||
826 | dec edi |
||
827 | mov eax, [esp+28] |
||
828 | mov ecx, [eax] |
||
829 | mov [RAMDISK_FAT+ecx*2], di |
||
830 | mov [eax], edi |
||
831 | shl edi, 9 |
||
832 | add edi, (31 shl 9)+RAMDISK |
||
833 | mov [esp], edi |
||
834 | xor eax, eax |
||
835 | mov ecx, 128 |
||
836 | rep stosd |
||
837 | popa |
||
838 | clc |
||
839 | ret |
||
840 | .notfound: |
||
841 | popa |
||
842 | stc |
||
843 | ret |
||
844 | |||
845 | rd_find_lfn: |
||
846 | ; in: esi+ebp -> name |
||
847 | ; out: CF=1 - file not found |
||
848 | ; else CF=0 and edi->direntry |
||
849 | push esi edi |
||
850 | push 0 |
||
851 | push ramdisk_root_first |
||
852 | push ramdisk_root_next |
||
853 | .loop: |
||
854 | call fat_find_lfn |
||
855 | jc .notfound |
||
856 | cmp byte [esi], 0 |
||
857 | jz .found |
||
858 | .continue: |
||
859 | test byte [edi+11], 10h |
||
860 | jz .notfound |
||
861 | movzx eax, word [edi+26] |
||
862 | mov [esp+8], eax |
||
863 | mov dword [esp+4], ramdisk_notroot_first |
||
864 | mov dword [esp], ramdisk_notroot_next |
||
865 | test eax, eax |
||
866 | jnz .loop |
||
867 | mov dword [esp+4], ramdisk_root_first |
||
868 | mov dword [esp], ramdisk_notroot_next |
||
869 | jmp .loop |
||
870 | .notfound: |
||
871 | add esp, 12 |
||
872 | pop edi esi |
||
873 | stc |
||
874 | ret |
||
875 | .found: |
||
876 | test ebp, ebp |
||
877 | jz @f |
||
878 | mov esi, ebp |
||
879 | xor ebp, ebp |
||
880 | jmp .continue |
||
881 | @@: |
||
882 | mov eax, [esp+8] |
||
883 | add esp, 16 ; CF=0 |
||
884 | pop esi |
||
885 | ret |
||
886 | |||
887 | ;---------------------------------------------------------------- |
||
888 | ; |
||
889 | ; fs_RamdiskRead - LFN variant for reading sys floppy |
||
890 | ; |
||
891 | ; esi points to filename |
||
892 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
893 | ; may be ebx=0 - start from first byte |
||
894 | ; ecx number of bytes to read, 0+ |
||
895 | ; edx mem location to return data |
||
896 | ; |
||
897 | ; ret ebx = bytes read or 0xffffffff file not found |
||
898 | ; eax = 0 ok read or other = errormsg |
||
899 | ; |
||
900 | ;-------------------------------------------------------------- |
||
901 | fs_RamdiskRead: |
||
902 | cmp byte [esi], 0 |
||
903 | jnz @f |
||
904 | or ebx, -1 |
||
905 | mov eax, 10 ; access denied |
||
906 | ret |
||
907 | @@: |
||
908 | push edi |
||
909 | call rd_find_lfn |
||
910 | jnc .found |
||
911 | pop edi |
||
912 | or ebx, -1 |
||
913 | mov eax, 5 ; file not found |
||
914 | ret |
||
915 | .found: |
||
916 | test ebx, ebx |
||
917 | jz .l1 |
||
918 | cmp dword [ebx+4], 0 |
||
919 | jz @f |
||
920 | xor ebx, ebx |
||
921 | .reteof: |
||
922 | mov eax, 6 ; EOF |
||
923 | pop edi |
||
924 | ret |
||
925 | @@: |
||
926 | mov ebx, [ebx] |
||
927 | .l1: |
||
928 | push ecx edx |
||
929 | push 0 |
||
930 | mov eax, [edi+28] |
||
931 | sub eax, ebx |
||
932 | jb .eof |
||
933 | cmp eax, ecx |
||
934 | jae @f |
||
935 | mov ecx, eax |
||
936 | mov byte [esp], 6 ; EOF |
||
937 | @@: |
||
938 | movzx edi, word [edi+26] ; cluster |
||
939 | .new: |
||
940 | jecxz .done |
||
941 | test edi, edi |
||
942 | jz .eof |
||
943 | cmp edi, 0xFF8 |
||
944 | jae .eof |
||
945 | lea eax, [edi+31] ; bootsector+2*fat+filenames |
||
946 | shl eax, 9 ; *512 |
||
947 | add eax, RAMDISK ; image base |
||
948 | ; now eax points to data of cluster |
||
949 | sub ebx, 512 |
||
950 | jae .skip |
||
951 | lea eax, [eax+ebx+512] |
||
952 | neg ebx |
||
953 | push ecx |
||
954 | cmp ecx, ebx |
||
955 | jbe @f |
||
956 | mov ecx, ebx |
||
957 | @@: |
||
958 | mov ebx, edx |
||
959 | call memmove |
||
960 | add edx, ecx |
||
961 | sub [esp], ecx |
||
962 | pop ecx |
||
963 | xor ebx, ebx |
||
964 | .skip: |
||
965 | movzx edi, word [edi*2+RAMDISK_FAT] ; find next cluster from FAT |
||
966 | jmp .new |
||
967 | .eof: |
||
968 | mov ebx, edx |
||
969 | pop eax edx ecx |
||
970 | sub ebx, edx |
||
971 | jmp .reteof |
||
972 | .done: |
||
973 | mov ebx, edx |
||
974 | pop eax edx ecx edi |
||
975 | sub ebx, edx |
||
976 | ret |
||
977 | |||
978 | ;---------------------------------------------------------------- |
||
979 | ; |
||
980 | ; fs_RamdiskReadFolder - LFN variant for reading sys floppy folder |
||
981 | ; |
||
982 | ; esi points to filename; only root is folder on ramdisk |
||
983 | ; ebx pointer to structure 32-bit number = first wanted block |
||
984 | ; & flags (bitfields) |
||
985 | ; flags: bit 0: 0=ANSI names, 1=UNICODE names |
||
986 | ; ecx number of blocks to read, 0+ |
||
987 | ; edx mem location to return data |
||
988 | ; |
||
989 | ; ret ebx = size or 0xffffffff file not found |
||
990 | ; eax = 0 ok read or other = errormsg |
||
991 | ; |
||
992 | ;-------------------------------------------------------------- |
||
993 | fs_RamdiskReadFolder: |
||
994 | push edi |
||
995 | cmp byte [esi], 0 |
||
996 | jz .root |
||
997 | call rd_find_lfn |
||
998 | jnc .found |
||
999 | pop edi |
||
1000 | or ebx, -1 |
||
1001 | mov eax, ERROR_FILE_NOT_FOUND |
||
1002 | ret |
||
1003 | .found: |
||
1004 | test byte [edi+11], 0x10 |
||
1005 | jnz .found_dir |
||
1006 | pop edi |
||
1007 | or ebx, -1 |
||
1008 | mov eax, ERROR_ACCESS_DENIED |
||
1009 | ret |
||
1010 | .found_dir: |
||
1011 | movzx eax, word [edi+26] |
||
1012 | add eax, 31 |
||
1013 | push 0 |
||
1014 | jmp .doit |
||
1015 | .root: |
||
1016 | mov eax, 19 |
||
1017 | push 14 |
||
1018 | .doit: |
||
1019 | push esi ecx ebp |
||
1020 | sub esp, 262*2 ; reserve space for LFN |
||
1021 | mov ebp, esp |
||
1022 | push dword [ebx+4] ; for fat_get_name: read ANSI/UNICODE names |
||
1023 | mov ebx, [ebx] |
||
1024 | ; init header |
||
1025 | push eax ecx |
||
1026 | mov edi, edx |
||
1027 | mov ecx, 32/4 |
||
1028 | xor eax, eax |
||
1029 | rep stosd |
||
1030 | mov byte [edx], 1 ; version |
||
1031 | pop ecx eax |
||
1032 | mov esi, edi ; esi points to block of data of folder entry (BDFE) |
||
1033 | .main_loop: |
||
1034 | mov edi, eax |
||
1035 | shl edi, 9 |
||
1036 | add edi, RAMDISK |
||
1037 | push eax |
||
1038 | .l1: |
||
1039 | call fat_get_name |
||
1040 | jc .l2 |
||
1041 | cmp byte [edi+11], 0xF |
||
1042 | jnz .do_bdfe |
||
1043 | add edi, 0x20 |
||
1044 | test edi, 0x1FF |
||
1045 | jnz .do_bdfe |
||
1046 | pop eax |
||
1047 | inc eax |
||
1048 | dec byte [esp+262*2+16] |
||
1049 | jz .done |
||
1050 | jns @f |
||
1051 | ; read next sector from FAT |
||
1052 | mov eax, [(eax-31-1)*2+RAMDISK_FAT] |
||
1053 | and eax, 0xFFF |
||
1054 | cmp eax, 0xFF8 |
||
1055 | jae .done |
||
1056 | add eax, 31 |
||
1057 | mov byte [esp+262*2+16], 0 |
||
1058 | @@: |
||
1059 | mov edi, eax |
||
1060 | shl edi, 9 |
||
1061 | add edi, RAMDISK |
||
1062 | push eax |
||
1063 | .do_bdfe: |
||
1064 | inc dword [edx+8] ; new file found |
||
1065 | dec ebx |
||
1066 | jns .l2 |
||
1067 | dec ecx |
||
1068 | js .l2 |
||
1069 | inc dword [edx+4] ; new file block copied |
||
1070 | call fat_entry_to_bdfe |
||
1071 | .l2: |
||
1072 | add edi, 0x20 |
||
1073 | test edi, 0x1FF |
||
1074 | jnz .l1 |
||
1075 | pop eax |
||
1076 | inc eax |
||
1077 | dec byte [esp+262*2+16] |
||
1078 | jz .done |
||
1079 | jns @f |
||
1080 | ; read next sector from FAT |
||
1081 | mov eax, [(eax-31-1)*2+RAMDISK_FAT] |
||
1082 | and eax, 0xFFF |
||
1083 | cmp eax, 0xFF8 |
||
1084 | jae .done |
||
1085 | add eax, 31 |
||
1086 | mov byte [esp+262*2+16], 0 |
||
1087 | @@: |
||
1088 | jmp .main_loop |
||
1089 | .done: |
||
1090 | add esp, 262*2+4 |
||
1091 | pop ebp |
||
1092 | mov ebx, [edx+4] |
||
1093 | xor eax, eax |
||
1094 | dec ecx |
||
1095 | js @f |
||
1096 | mov al, ERROR_END_OF_FILE |
||
1097 | @@: |
||
1098 | pop ecx esi edi edi |
||
1099 | ret |
||
1100 | |||
1101 | iglobal |
||
1102 | label fat_legal_chars byte |
||
1103 | ; 0 = not allowed |
||
1104 | ; 1 = allowed only in long names |
||
1105 | ; 3 = allowed |
||
1106 | times 32 db 0 |
||
1107 | ; ! " # $ % & ' ( ) * + , - . / |
||
1108 | db 1,3,0,3,3,3,3,3,3,3,0,1,1,3,3,0 |
||
1109 | ; 0 1 2 3 4 5 6 7 8 9 : ; < = > ? |
||
1110 | db 3,3,3,3,3,3,3,3,3,3,0,1,0,1,0,0 |
||
1111 | ; @ A B C D E F G H I J K L M N O |
||
1112 | db 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 |
||
1113 | ; P Q R S T U V W X Y Z [ \ ] ^ _ |
||
1114 | db 3,3,3,3,3,3,3,3,3,3,3,1,0,1,3,3 |
||
1115 | ; ` a b c d e f g h i j k l m n o |
||
1116 | db 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 |
||
1117 | ; p q r s t u v w x y z { | } ~ |
||
1118 | db 3,3,3,3,3,3,3,3,3,3,3,3,0,3,3,0 |
||
1119 | endg |
||
1120 | |||
1121 | fat_name_is_legal: |
||
1122 | ; in: esi->(long) name |
||
1123 | ; out: CF set <=> legal |
||
1124 | ; destroys eax |
||
1125 | push esi |
||
1126 | xor eax, eax |
||
1127 | @@: |
||
1128 | lodsb |
||
1129 | test al, al |
||
1130 | jz .done |
||
1131 | cmp al, 80h |
||
1132 | jae .big |
||
1133 | test [fat_legal_chars+eax], 1 |
||
1134 | jnz @b |
||
1135 | .err: |
||
1136 | pop esi |
||
1137 | clc |
||
1138 | ret |
||
1139 | .big: |
||
1140 | ; 0x80-0xAF, 0xE0-0xEF |
||
1141 | cmp al, 0xB0 |
||
1142 | jb @b |
||
1143 | cmp al, 0xE0 |
||
1144 | jb .err |
||
1145 | cmp al, 0xF0 |
||
1146 | jb @b |
||
1147 | jmp .err |
||
1148 | .done: |
||
1149 | sub esi, [esp] |
||
1150 | cmp esi, 257 |
||
1151 | pop esi |
||
1152 | ret |
||
1153 | |||
1154 | fat_next_short_name: |
||
1155 | ; in: edi->8+3 name |
||
1156 | ; out: name corrected |
||
1157 | ; CF=1 <=> error |
||
1158 | pushad |
||
1159 | mov ecx, 8 |
||
1160 | mov al, '~' |
||
1161 | std |
||
1162 | push edi |
||
1163 | add edi, 7 |
||
1164 | repnz scasb |
||
1165 | pop edi |
||
1166 | cld |
||
1167 | jz .tilde |
||
1168 | ; tilde is not found, insert "~1" at end |
||
1169 | add edi, 6 |
||
1170 | cmp word [edi], ' ' |
||
1171 | jnz .insert_tilde |
||
1172 | @@: |
||
1173 | dec edi |
||
1174 | cmp byte [edi], ' ' |
||
1175 | jz @b |
||
1176 | inc edi |
||
1177 | .insert_tilde: |
||
1178 | mov word [edi], '~1' |
||
1179 | popad |
||
1180 | clc |
||
1181 | ret |
||
1182 | .tilde: |
||
1183 | push edi |
||
1184 | add edi, 7 |
||
1185 | xor ecx, ecx |
||
1186 | @@: |
||
1187 | ; after tilde may be only digits and trailing spaces |
||
1188 | cmp byte [edi], '~' |
||
1189 | jz .break |
||
1190 | cmp byte [edi], ' ' |
||
1191 | jz .space |
||
1192 | cmp byte [edi], '9' |
||
1193 | jnz .found |
||
1194 | dec edi |
||
1195 | jmp @b |
||
1196 | .space: |
||
1197 | dec edi |
||
1198 | inc ecx |
||
1199 | jmp @b |
||
1200 | .found: |
||
1201 | inc byte [edi] |
||
1202 | add dword [esp], 8 |
||
1203 | jmp .zerorest |
||
1204 | .break: |
||
1205 | jecxz .noplace |
||
1206 | inc edi |
||
1207 | mov al, '1' |
||
1208 | @@: |
||
1209 | xchg al, [edi] |
||
1210 | inc edi |
||
1211 | cmp al, ' ' |
||
1212 | mov al, '0' |
||
1213 | jnz @b |
||
1214 | .succ: |
||
1215 | pop edi |
||
1216 | popad |
||
1217 | clc |
||
1218 | ret |
||
1219 | .noplace: |
||
1220 | dec edi |
||
1221 | cmp edi, [esp] |
||
1222 | jz .err |
||
1223 | add dword [esp], 8 |
||
1224 | mov word [edi], '~1' |
||
1225 | inc edi |
||
1226 | inc edi |
||
1227 | @@: |
||
1228 | mov byte [edi], '0' |
||
1229 | .zerorest: |
||
1230 | inc edi |
||
1231 | cmp edi, [esp] |
||
1232 | jb @b |
||
1233 | pop edi |
||
1234 | popad |
||
1235 | ;clc ; automatically |
||
1236 | ret |
||
1237 | .err: |
||
1238 | pop edi |
||
1239 | popad |
||
1240 | stc |
||
1241 | ret |
||
1242 | |||
1243 | fat_gen_short_name: |
||
1244 | ; in: esi->long name |
||
1245 | ; edi->buffer (8+3=11 chars) |
||
1246 | ; out: buffer filled |
||
1247 | pushad |
||
1248 | mov eax, ' ' |
||
1249 | push edi |
||
1250 | stosd |
||
1251 | stosd |
||
1252 | stosd |
||
1253 | pop edi |
||
1254 | xor eax, eax |
||
1255 | push 8 |
||
1256 | pop ebx |
||
1257 | lea ecx, [edi+8] |
||
1258 | .loop: |
||
1259 | lodsb |
||
1260 | test al, al |
||
1261 | jz .done |
||
1262 | call char_toupper |
||
1263 | cmp al, ' ' |
||
1264 | jz .space |
||
1265 | cmp al, 80h |
||
1266 | ja .big |
||
1267 | test [fat_legal_chars+eax], 2 |
||
1268 | jnz .symbol |
||
1269 | .inv_symbol: |
||
1270 | mov al, '_' |
||
1271 | or bh, 1 |
||
1272 | .symbol: |
||
1273 | cmp al, '.' |
||
1274 | jz .dot |
||
1275 | .normal_symbol: |
||
1276 | dec bl |
||
1277 | jns .store |
||
1278 | mov bl, 0 |
||
1279 | .space: |
||
1280 | or bh, 1 |
||
1281 | jmp .loop |
||
1282 | .store: |
||
1283 | stosb |
||
1284 | jmp .loop |
||
1285 | .big: |
||
1286 | cmp al, 0xB0 |
||
1287 | jb .normal_symbol |
||
1288 | cmp al, 0xE0 |
||
1289 | jb .inv_symbol |
||
1290 | cmp al, 0xF0 |
||
1291 | jb .normal_symbol |
||
1292 | jmp .inv_symbol |
||
1293 | .dot: |
||
1294 | test bh, 2 |
||
1295 | jz .firstdot |
||
1296 | pop ebx |
||
1297 | add ebx, edi |
||
1298 | sub ebx, ecx |
||
1299 | push ebx |
||
1300 | cmp ebx, ecx |
||
1301 | jb @f |
||
1302 | pop ebx |
||
1303 | push ecx |
||
1304 | @@: |
||
1305 | cmp edi, ecx |
||
1306 | jbe .skip |
||
1307 | @@: |
||
1308 | dec edi |
||
1309 | mov al, [edi] |
||
1310 | dec ebx |
||
1311 | mov [ebx], al |
||
1312 | mov byte [edi], ' ' |
||
1313 | cmp edi, ecx |
||
1314 | ja @b |
||
1315 | .skip: |
||
1316 | mov bh, 3 |
||
1317 | jmp @f |
||
1318 | .firstdot: |
||
1319 | cmp bl, 8 |
||
1320 | jz .space |
||
1321 | push edi |
||
1322 | or bh, 2 |
||
1323 | @@: |
||
1324 | mov edi, ecx |
||
1325 | mov bl, 3 |
||
1326 | jmp .loop |
||
1327 | .done: |
||
1328 | test bh, 2 |
||
1329 | jz @f |
||
1330 | pop edi |
||
1331 | @@: |
||
1332 | lea edi, [ecx-8] |
||
1333 | test bh, 1 |
||
1334 | jz @f |
||
1335 | call fat_next_short_name |
||
1336 | @@: |
||
1337 | popad |
||
1338 | ret |
||
1339 | |||
1340 | ;---------------------------------------------------------------- |
||
1341 | ; |
||
1342 | ; fs_RamdiskRewrite - LFN variant for writing ramdisk |
||
1343 | ; fs_RamdiskCreateFolder - create folder on ramdisk |
||
1344 | ; |
||
1345 | ; esi points to file/folder name |
||
1346 | ; ebx ignored (reserved) |
||
1347 | ; ecx number of bytes to write, 0+ (ignored for folders) |
||
1348 | ; edx mem location to data (ignored for folders) |
||
1349 | ; |
||
1350 | ; ret ebx = number of written bytes |
||
1351 | ; eax = 0 ok read or other = errormsg |
||
1352 | ; |
||
1353 | ;-------------------------------------------------------------- |
||
1354 | @@: |
||
1355 | mov eax, ERROR_ACCESS_DENIED |
||
1356 | xor ebx, ebx |
||
1357 | ret |
||
1358 | |||
1359 | fs_RamdiskCreateFolder: |
||
1360 | mov al, 1 ; create folder |
||
1361 | jmp fs_RamdiskRewrite.common |
||
1362 | |||
1363 | fs_RamdiskRewrite: |
||
1364 | xor eax, eax ; create file |
||
1365 | .common: |
||
1366 | cmp byte [esi], 0 |
||
1367 | jz @b |
||
1368 | pushad |
||
1369 | xor edi, edi |
||
1370 | push esi |
||
1371 | test ebp, ebp |
||
1372 | jz @f |
||
1373 | mov esi, ebp |
||
1374 | @@: |
||
1375 | lodsb |
||
1376 | test al, al |
||
1377 | jz @f |
||
1378 | cmp al, '/' |
||
1379 | jnz @b |
||
1380 | lea edi, [esi-1] |
||
1381 | jmp @b |
||
1382 | @@: |
||
1383 | pop esi |
||
1384 | test edi, edi |
||
1385 | jnz .noroot |
||
1386 | test ebp, ebp |
||
1387 | jnz .hasebp |
||
1388 | push ramdisk_root_extend_dir |
||
1389 | push ramdisk_root_next_write |
||
1390 | push edi |
||
1391 | push ramdisk_root_first |
||
1392 | push ramdisk_root_next |
||
1393 | jmp .common1 |
||
1394 | .hasebp: |
||
1395 | mov eax, ERROR_ACCESS_DENIED |
||
1396 | cmp byte [ebp], 0 |
||
1397 | jz .ret1 |
||
1398 | push ebp |
||
1399 | xor ebp, ebp |
||
1400 | call rd_find_lfn |
||
1401 | pop esi |
||
1402 | jc .notfound0 |
||
1403 | jmp .common0 |
||
1404 | .noroot: |
||
1405 | mov eax, ERROR_ACCESS_DENIED |
||
1406 | cmp byte [edi+1], 0 |
||
1407 | jz .ret1 |
||
1408 | ; check existence |
||
1409 | mov byte [edi], 0 |
||
1410 | push edi |
||
1411 | call rd_find_lfn |
||
1412 | pop esi |
||
1413 | mov byte [esi], '/' |
||
1414 | jnc @f |
||
1415 | .notfound0: |
||
1416 | mov eax, ERROR_FILE_NOT_FOUND |
||
1417 | .ret1: |
||
1418 | mov [esp+28], eax |
||
1419 | popad |
||
1420 | xor ebx, ebx |
||
1421 | ret |
||
1422 | @@: |
||
1423 | inc esi |
||
1424 | .common0: |
||
1425 | test byte [edi+11], 0x10 ; must be directory |
||
1426 | mov eax, ERROR_ACCESS_DENIED |
||
1427 | jz .ret1 |
||
1428 | movzx ebp, word [edi+26] ; ebp=cluster |
||
1429 | mov eax, ERROR_FAT_TABLE |
||
1430 | cmp ebp, 2 |
||
1431 | jb .ret1 |
||
1432 | cmp ebp, 2849 |
||
1433 | jae .ret1 |
||
1434 | push ramdisk_notroot_extend_dir |
||
1435 | push ramdisk_notroot_next_write |
||
1436 | push ebp |
||
1437 | push ramdisk_notroot_first |
||
1438 | push ramdisk_notroot_next |
||
1439 | .common1: |
||
1440 | call fat_find_lfn |
||
1441 | jc .notfound |
||
1442 | ; found |
||
1443 | test byte [edi+11], 10h |
||
1444 | jz .exists_file |
||
1445 | ; found directory; if we are creating directory, return OK, |
||
1446 | ; if we are creating file, say "access denied" |
||
1447 | add esp, 20 |
||
1448 | popad |
||
1449 | test al, al |
||
1450 | mov eax, ERROR_ACCESS_DENIED |
||
1451 | jz @f |
||
1452 | mov al, 0 |
||
1453 | @@: |
||
1454 | xor ebx, ebx |
||
1455 | ret |
||
1456 | .exists_file: |
||
1457 | ; found file; if we are creating directory, return "access denied", |
||
1458 | ; if we are creating file, delete existing file and continue |
||
1459 | cmp byte [esp+20+28], 0 |
||
1460 | jz @f |
||
1461 | add esp, 20 |
||
1462 | popad |
||
1463 | mov eax, ERROR_ACCESS_DENIED |
||
1464 | xor ebx, ebx |
||
1465 | ret |
||
1466 | @@: |
||
1467 | ; delete FAT chain |
||
1468 | push edi |
||
1469 | xor eax, eax |
||
1470 | mov dword [edi+28], eax ; zero size |
||
1471 | xchg ax, word [edi+26] ; start cluster |
||
1472 | test eax, eax |
||
1473 | jz .done1 |
||
1474 | @@: |
||
1475 | cmp eax, 0xFF8 |
||
1476 | jae .done1 |
||
1477 | lea edi, [RAMDISK_FAT + eax*2] ; position in FAT |
||
1478 | xor eax, eax |
||
1479 | xchg ax, [edi] |
||
1480 | jmp @b |
||
1481 | .done1: |
||
1482 | pop edi |
||
1483 | call get_time_for_file |
||
1484 | mov [edi+22], ax |
||
1485 | call get_date_for_file |
||
1486 | mov [edi+24], ax |
||
1487 | mov [edi+18], ax |
||
1488 | or byte [edi+11], 20h ; set 'archive' attribute |
||
1489 | jmp .doit |
||
1490 | .notfound: |
||
1491 | ; file is not found; generate short name |
||
1492 | call fat_name_is_legal |
||
1493 | jc @f |
||
1494 | add esp, 20 |
||
1495 | popad |
||
1496 | mov eax, ERROR_FILE_NOT_FOUND |
||
1497 | xor ebx, ebx |
||
1498 | ret |
||
1499 | @@: |
||
1500 | sub esp, 12 |
||
1501 | mov edi, esp |
||
1502 | call fat_gen_short_name |
||
1503 | .test_short_name_loop: |
||
1504 | push esi edi ecx |
||
1505 | mov esi, edi |
||
1506 | lea eax, [esp+12+12+8] |
||
1507 | mov [eax], ebp |
||
1508 | call dword [eax-4] |
||
1509 | jc .found |
||
1510 | .test_short_name_entry: |
||
1511 | cmp byte [edi+11], 0xF |
||
1512 | jz .test_short_name_cont |
||
1513 | mov ecx, 11 |
||
1514 | push esi edi |
||
1515 | repz cmpsb |
||
1516 | pop edi esi |
||
1517 | jz .short_name_found |
||
1518 | .test_short_name_cont: |
||
1519 | lea eax, [esp+12+12+8] |
||
1520 | call dword [eax-8] |
||
1521 | jnc .test_short_name_entry |
||
1522 | jmp .found |
||
1523 | .short_name_found: |
||
1524 | pop ecx edi esi |
||
1525 | call fat_next_short_name |
||
1526 | jnc .test_short_name_loop |
||
1527 | .disk_full: |
||
1528 | add esp, 12+20 |
||
1529 | popad |
||
1530 | mov eax, ERROR_DISK_FULL |
||
1531 | xor ebx, ebx |
||
1532 | ret |
||
1533 | .found: |
||
1534 | pop ecx edi esi |
||
1535 | ; now find space in directory |
||
1536 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
||
1537 | mov al, '~' |
||
1538 | push ecx edi |
||
1539 | mov ecx, 8 |
||
1540 | repnz scasb |
||
1541 | push 1 |
||
1542 | pop eax ; 1 entry |
||
1543 | jnz .notilde |
||
1544 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
||
1545 | xor eax, eax |
||
1546 | @@: |
||
1547 | cmp byte [esi], 0 |
||
1548 | jz @f |
||
1549 | inc esi |
||
1550 | inc eax |
||
1551 | jmp @b |
||
1552 | @@: |
||
1553 | sub esi, eax |
||
1554 | add eax, 12+13 |
||
1555 | mov ecx, 13 |
||
1556 | push edx |
||
1557 | cdq |
||
1558 | div ecx |
||
1559 | pop edx |
||
1560 | .notilde: |
||
1561 | push -1 |
||
1562 | push -1 |
||
1563 | ; find |
||
1564 | xor ecx, ecx |
||
1565 | push eax |
||
1566 | lea eax, [esp+12+8+12+8] |
||
1567 | mov [eax], ebp |
||
1568 | call dword [eax-4] |
||
1569 | pop eax |
||
1570 | .scan_dir: |
||
1571 | cmp byte [edi], 0 |
||
1572 | jz .free |
||
1573 | cmp byte [edi], 0xE5 |
||
1574 | jz .free |
||
1575 | xor ecx, ecx |
||
1576 | .scan_cont: |
||
1577 | push eax |
||
1578 | lea eax, [esp+12+8+12+8] |
||
1579 | call dword [eax-8] |
||
1580 | pop eax |
||
1581 | jnc .scan_dir |
||
1582 | push eax |
||
1583 | lea eax, [esp+12+8+12+8] |
||
1584 | call dword [eax+8] ; extend directory |
||
1585 | pop eax |
||
1586 | jnc .scan_dir |
||
1587 | add esp, 8+8+12+20 |
||
1588 | popad |
||
1589 | mov eax, ERROR_DISK_FULL |
||
1590 | xor ebx, ebx |
||
1591 | ret |
||
1592 | .free: |
||
1593 | test ecx, ecx |
||
1594 | jnz @f |
||
1595 | mov [esp], edi |
||
1596 | mov ecx, [esp+8+8+12+8] |
||
1597 | mov [esp+4], ecx |
||
1598 | xor ecx, ecx |
||
1599 | @@: |
||
1600 | inc ecx |
||
1601 | cmp ecx, eax |
||
1602 | jb .scan_cont |
||
1603 | ; found! |
||
1604 | ; calculate name checksum |
||
1605 | push esi ecx |
||
1606 | mov esi, [esp+8+8] |
||
1607 | mov ecx, 11 |
||
1608 | xor eax, eax |
||
1609 | @@: |
||
1610 | ror al, 1 |
||
1611 | add al, [esi] |
||
1612 | inc esi |
||
1613 | loop @b |
||
1614 | pop ecx esi |
||
1615 | pop edi |
||
1616 | pop dword [esp+8+12+8] |
||
1617 | ; edi points to last entry in free chunk |
||
1618 | dec ecx |
||
1619 | jz .nolfn |
||
1620 | push esi |
||
1621 | push eax |
||
1622 | mov al, 40h |
||
1623 | .writelfn: |
||
1624 | or al, cl |
||
1625 | mov esi, [esp+4] |
||
1626 | push ecx |
||
1627 | dec ecx |
||
1628 | imul ecx, 13 |
||
1629 | add esi, ecx |
||
1630 | stosb |
||
1631 | mov cl, 5 |
||
1632 | call .read_symbols |
||
1633 | mov ax, 0xF |
||
1634 | stosw |
||
1635 | mov al, [esp+4] |
||
1636 | stosb |
||
1637 | mov cl, 6 |
||
1638 | call .read_symbols |
||
1639 | xor eax, eax |
||
1640 | stosw |
||
1641 | mov cl, 2 |
||
1642 | call .read_symbols |
||
1643 | pop ecx |
||
1644 | lea eax, [esp+8+8+12+8] |
||
1645 | call dword [eax+4] ; next write |
||
1646 | xor eax, eax |
||
1647 | loop .writelfn |
||
1648 | pop eax |
||
1649 | pop esi |
||
1650 | .nolfn: |
||
1651 | xchg esi, [esp] |
||
1652 | mov ecx, 11 |
||
1653 | rep movsb |
||
1654 | mov word [edi], 20h ; attributes |
||
1655 | sub edi, 11 |
||
1656 | pop esi ecx |
||
1657 | add esp, 12 |
||
1658 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
||
1659 | call get_time_for_file |
||
1660 | mov [edi+14], ax ; creation time |
||
1661 | mov [edi+22], ax ; last write time |
||
1662 | call get_date_for_file |
||
1663 | mov [edi+16], ax ; creation date |
||
1664 | mov [edi+24], ax ; last write date |
||
1665 | mov [edi+18], ax ; last access date |
||
1666 | and word [edi+20], 0 ; high word of cluster |
||
1667 | and word [edi+26], 0 ; low word of cluster - to be filled |
||
1668 | and dword [edi+28], 0 ; file size - to be filled |
||
1669 | cmp byte [esp+20+28], 0 |
||
1670 | jz .doit |
||
1671 | ; create directory |
||
1672 | mov byte [edi+11], 10h ; attributes: folder |
||
1673 | mov ecx, 32*2 |
||
1674 | mov edx, edi |
||
1675 | .doit: |
||
1676 | push edx |
||
1677 | push ecx |
||
1678 | push edi |
||
1679 | add edi, 26 ; edi points to low word of cluster |
||
1680 | push edi |
||
1681 | jecxz .done |
||
1682 | mov ecx, 2849 |
||
1683 | mov edi, RAMDISK_FAT |
||
1684 | .write_loop: |
||
1685 | ; allocate new cluster |
||
1686 | xor eax, eax |
||
1687 | repnz scasw |
||
1688 | jnz .disk_full2 |
||
1689 | dec edi |
||
1690 | dec edi |
||
1691 | |||
1692 | ; lea eax, [edi-(RAMDISK_FAT)] |
||
1693 | |||
1694 | mov eax, edi |
||
1695 | sub eax, RAMDISK_FAT |
||
1696 | |||
1697 | shr eax, 1 ; eax = cluster |
||
1698 | mov word [edi], 0xFFF ; mark as last cluster |
||
1699 | xchg edi, [esp] |
||
1700 | stosw |
||
1701 | pop edi |
||
1702 | push edi |
||
1703 | inc ecx |
||
1704 | ; write data |
||
1705 | cmp byte [esp+16+20+28], 0 |
||
1706 | jnz .writedir |
||
1707 | shl eax, 9 |
||
1708 | add eax, RAMDISK+31*512 |
||
1709 | .writefile: |
||
1710 | mov ebx, edx |
||
1711 | xchg eax, ebx |
||
1712 | push ecx |
||
1713 | mov ecx, 512 |
||
1714 | cmp dword [esp+12], ecx |
||
1715 | jae @f |
||
1716 | mov ecx, [esp+12] |
||
1717 | @@: |
||
1718 | call memmove |
||
1719 | add edx, ecx |
||
1720 | sub [esp+12], ecx |
||
1721 | pop ecx |
||
1722 | jnz .write_loop |
||
1723 | .done: |
||
1724 | mov ebx, edx |
||
1725 | pop edi edi ecx edx |
||
1726 | sub ebx, edx |
||
1727 | mov [edi+28], ebx |
||
1728 | add esp, 20 |
||
1729 | mov [esp+16], ebx |
||
1730 | popad |
||
1731 | xor eax, eax |
||
1732 | ret |
||
1733 | .disk_full2: |
||
1734 | mov ebx, edx |
||
1735 | pop edi edi ecx edx |
||
1736 | sub ebx, edx |
||
1737 | mov [edi+28], ebx |
||
1738 | add esp, 20 |
||
1739 | mov [esp+16], ebx |
||
1740 | popad |
||
1741 | push ERROR_DISK_FULL |
||
1742 | pop eax |
||
1743 | ret |
||
1744 | .writedir: |
||
1745 | mov edi, eax |
||
1746 | shl edi, 9 |
||
1747 | add edi, RAMDISK+31*512 |
||
1748 | mov esi, edx |
||
1749 | mov ecx, 32/4 |
||
1750 | push ecx |
||
1751 | rep movsd |
||
1752 | mov dword [edi-32], '. ' |
||
1753 | mov dword [edi-32+4], ' ' |
||
1754 | mov dword [edi-32+8], ' ' |
||
1755 | mov byte [edi-32+11], 10h |
||
1756 | mov word [edi-32+26], ax |
||
1757 | mov esi, edx |
||
1758 | pop ecx |
||
1759 | rep movsd |
||
1760 | mov dword [edi-32], '.. ' |
||
1761 | mov dword [edi-32+4], ' ' |
||
1762 | mov dword [edi-32+8], ' ' |
||
1763 | mov byte [edi-32+11], 10h |
||
1764 | mov eax, [esp+16+8] |
||
1765 | mov word [edi-32+26], ax |
||
1766 | xor eax, eax |
||
1767 | mov ecx, (512-32*2)/4 |
||
1768 | rep stosd |
||
1769 | pop edi edi ecx edx |
||
1770 | add esp, 20 |
||
1771 | popad |
||
1772 | xor eax, eax |
||
1773 | xor ebx, ebx |
||
1774 | ret |
||
1775 | |||
1776 | .read_symbol: |
||
1777 | or ax, -1 |
||
1778 | test esi, esi |
||
1779 | jz .retFFFF |
||
1780 | lodsb |
||
1781 | test al, al |
||
1782 | jnz ansi2uni_char |
||
1783 | xor eax, eax |
||
1784 | xor esi, esi |
||
1785 | .retFFFF: |
||
1786 | ret |
||
1787 | |||
1788 | .read_symbols: |
||
1789 | call .read_symbol |
||
1790 | stosw |
||
1791 | loop .read_symbols |
||
1792 | ret |
||
1793 | |||
1794 | ;---------------------------------------------------------------- |
||
1795 | ; |
||
1796 | ; fs_RamdiskWrite - LFN variant for writing to sys floppy |
||
1797 | ; |
||
1798 | ; esi points to filename |
||
1799 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
1800 | ; may be ebx=0 - start from first byte |
||
1801 | ; ecx number of bytes to write, 0+ |
||
1802 | ; edx mem location to data |
||
1803 | ; |
||
1804 | ; ret ebx = bytes written (maybe 0) |
||
1805 | ; eax = 0 ok write or other = errormsg |
||
1806 | ; |
||
1807 | ;-------------------------------------------------------------- |
||
1808 | @@: |
||
1809 | push ERROR_ACCESS_DENIED |
||
1810 | fs_RamdiskWrite.ret0: |
||
1811 | pop eax |
||
1812 | xor ebx, ebx |
||
1813 | ret |
||
1814 | |||
1815 | fs_RamdiskWrite: |
||
1816 | cmp byte [esi], 0 |
||
1817 | jz @b |
||
1818 | pushad |
||
1819 | call rd_find_lfn |
||
1820 | jnc .found |
||
1821 | popad |
||
1822 | push ERROR_FILE_NOT_FOUND |
||
1823 | jmp .ret0 |
||
1824 | .found: |
||
1825 | ; must not be directory |
||
1826 | test byte [edi+11], 10h |
||
1827 | jz @f |
||
1828 | popad |
||
1829 | push ERROR_ACCESS_DENIED |
||
1830 | jmp .ret0 |
||
1831 | @@: |
||
1832 | ; FAT does not support files larger than 4GB |
||
1833 | test ebx, ebx |
||
1834 | jz .l1 |
||
1835 | cmp dword [ebx+4], 0 |
||
1836 | jz @f |
||
1837 | .eof: |
||
1838 | popad |
||
1839 | push ERROR_END_OF_FILE |
||
1840 | jmp .ret0 |
||
1841 | @@: |
||
1842 | mov ebx, [ebx] |
||
1843 | .l1: |
||
1844 | ; now edi points to direntry, ebx=start byte to write, |
||
1845 | ; ecx=number of bytes to write, edx=data pointer |
||
1846 | call fat_update_datetime |
||
1847 | |||
1848 | ; extend file if needed |
||
1849 | add ecx, ebx |
||
1850 | jc .eof ; FAT does not support files larger than 4GB |
||
1851 | push 0 ; return value=0 |
||
1852 | cmp ecx, [edi+28] |
||
1853 | jbe .length_ok |
||
1854 | cmp ecx, ebx |
||
1855 | jz .length_ok |
||
1856 | call ramdisk_extend_file |
||
1857 | jnc .length_ok |
||
1858 | ; ramdisk_extend_file can return two error codes: FAT table error or disk full. |
||
1859 | ; First case is fatal error, in second case we may write some data |
||
1860 | mov [esp], eax |
||
1861 | cmp al, ERROR_DISK_FULL |
||
1862 | jz .disk_full |
||
1863 | pop eax |
||
1864 | mov [esp+28], eax |
||
1865 | popad |
||
1866 | xor ebx, ebx |
||
1867 | ret |
||
1868 | .disk_full: |
||
1869 | ; correct number of bytes to write |
||
1870 | mov ecx, [edi+28] |
||
1871 | cmp ecx, ebx |
||
1872 | ja .length_ok |
||
1873 | .ret: |
||
1874 | pop eax |
||
1875 | mov [esp+28], eax ; eax=return value |
||
1876 | sub edx, [esp+20] |
||
1877 | mov [esp+16], edx ; ebx=number of written bytes |
||
1878 | popad |
||
1879 | ret |
||
1880 | .length_ok: |
||
1881 | ; now ebx=start pos, ecx=end pos, both lie inside file |
||
1882 | sub ecx, ebx |
||
1883 | jz .ret |
||
1884 | movzx edi, word [edi+26] ; starting cluster |
||
1885 | .write_loop: |
||
1886 | sub ebx, 0x200 |
||
1887 | jae .next_cluster |
||
1888 | push ecx |
||
1889 | neg ebx |
||
1890 | cmp ecx, ebx |
||
1891 | jbe @f |
||
1892 | mov ecx, ebx |
||
1893 | @@: |
||
1894 | mov eax, edi |
||
1895 | shl eax, 9 |
||
1896 | add eax, RAMDISK+31*512+0x200 |
||
1897 | sub eax, ebx |
||
1898 | mov ebx, eax |
||
1899 | mov eax, edx |
||
1900 | call memmove |
||
1901 | xor ebx, ebx |
||
1902 | add edx, ecx |
||
1903 | sub [esp], ecx |
||
1904 | pop ecx |
||
1905 | jz .ret |
||
1906 | .next_cluster: |
||
1907 | movzx edi, word [edi*2+RAMDISK_FAT] |
||
1908 | jmp .write_loop |
||
1909 | |||
1910 | ramdisk_extend_file.zero_size: |
||
1911 | xor eax, eax |
||
1912 | jmp ramdisk_extend_file.start_extend |
||
1913 | |||
1914 | ; extends file on ramdisk to given size, new data area is filled by 0 |
||
1915 | ; in: edi->direntry, ecx=new size |
||
1916 | ; out: CF=0 => OK, eax=0 |
||
1917 | ; CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL) |
||
1918 | ramdisk_extend_file: |
||
1919 | push ecx |
||
1920 | ; find the last cluster of file |
||
1921 | movzx eax, word [edi+26] ; first cluster |
||
1922 | mov ecx, [edi+28] |
||
1923 | jecxz .zero_size |
||
1924 | @@: |
||
1925 | sub ecx, 0x200 |
||
1926 | jbe @f |
||
1927 | mov eax, [eax*2+RAMDISK_FAT] |
||
1928 | and eax, 0xFFF |
||
1929 | jz .fat_err |
||
1930 | cmp eax, 0xFF8 |
||
1931 | jb @b |
||
1932 | .fat_err: |
||
1933 | pop ecx |
||
1934 | push ERROR_FAT_TABLE |
||
1935 | pop eax |
||
1936 | stc |
||
1937 | ret |
||
1938 | @@: |
||
1939 | push eax |
||
1940 | mov eax, [eax*2+RAMDISK_FAT] |
||
1941 | and eax, 0xFFF |
||
1942 | cmp eax, 0xFF8 |
||
1943 | pop eax |
||
1944 | jb .fat_err |
||
1945 | ; set length to full number of sectors and make sure that last sector is zero-padded |
||
1946 | sub [edi+28], ecx |
||
1947 | push eax edi |
||
1948 | mov edi, eax |
||
1949 | shl edi, 9 |
||
1950 | lea edi, [edi+RAMDISK+31*512+0x200+ecx] |
||
1951 | neg ecx |
||
1952 | xor eax, eax |
||
1953 | rep stosb |
||
1954 | pop edi eax |
||
1955 | .start_extend: |
||
1956 | pop ecx |
||
1957 | ; now do extend |
||
1958 | push edx esi |
||
1959 | mov esi, RAMDISK_FAT+2*2 ; start scan from cluster 2 |
||
1960 | mov edx, 2847 ; number of clusters to scan |
||
1961 | .extend_loop: |
||
1962 | cmp [edi+28], ecx |
||
1963 | jae .extend_done |
||
1964 | ; add new sector |
||
1965 | push ecx |
||
1966 | mov ecx, edx |
||
1967 | push edi |
||
1968 | mov edi, esi |
||
1969 | jecxz .disk_full |
||
1970 | push eax |
||
1971 | xor eax, eax |
||
1972 | repnz scasw |
||
1973 | pop eax |
||
1974 | jnz .disk_full |
||
1975 | mov word [edi-2], 0xFFF |
||
1976 | mov esi, edi |
||
1977 | mov edx, ecx |
||
1978 | sub edi, RAMDISK_FAT |
||
1979 | shr edi, 1 |
||
1980 | dec edi ; now edi=new cluster |
||
1981 | test eax, eax |
||
1982 | jz .first_cluster |
||
1983 | mov [RAMDISK_FAT+eax*2], di |
||
1984 | jmp @f |
||
1985 | .first_cluster: |
||
1986 | pop eax ; eax->direntry |
||
1987 | push eax |
||
1988 | mov [eax+26], di |
||
1989 | @@: |
||
1990 | push edi |
||
1991 | shl edi, 9 |
||
1992 | add edi, RAMDISK+31*512 |
||
1993 | xor eax, eax |
||
1994 | mov ecx, 512/4 |
||
1995 | rep stosd |
||
1996 | pop eax ; eax=new cluster |
||
1997 | pop edi ; edi->direntry |
||
1998 | pop ecx ; ecx=required size |
||
1999 | add dword [edi+28], 0x200 |
||
2000 | jmp .extend_loop |
||
2001 | .extend_done: |
||
2002 | mov [edi+28], ecx |
||
2003 | pop esi edx |
||
2004 | xor eax, eax ; CF=0 |
||
2005 | ret |
||
2006 | .disk_full: |
||
2007 | pop edi ecx |
||
2008 | pop esi edx |
||
2009 | stc |
||
2010 | push ERROR_DISK_FULL |
||
2011 | pop eax |
||
2012 | ret |
||
2013 | |||
2014 | fat_update_datetime: |
||
2015 | call get_time_for_file |
||
2016 | mov [edi+22], ax ; last write time |
||
2017 | call get_date_for_file |
||
2018 | mov [edi+24], ax ; last write date |
||
2019 | mov [edi+18], ax ; last access date |
||
2020 | ret |
||
2021 | |||
2022 | ;---------------------------------------------------------------- |
||
2023 | ; |
||
2024 | ; fs_RamdiskSetFileEnd - set end of file on ramdisk |
||
2025 | ; |
||
2026 | ; esi points to filename |
||
2027 | ; ebx points to 64-bit number = new file size |
||
2028 | ; ecx ignored (reserved) |
||
2029 | ; edx ignored (reserved) |
||
2030 | ; |
||
2031 | ; ret eax = 0 ok or other = errormsg |
||
2032 | ; |
||
2033 | ;-------------------------------------------------------------- |
||
2034 | fs_RamdiskSetFileEnd: |
||
2035 | cmp byte [esi], 0 |
||
2036 | jnz @f |
||
2037 | .access_denied: |
||
2038 | push ERROR_ACCESS_DENIED |
||
2039 | jmp .ret |
||
2040 | @@: |
||
2041 | push edi |
||
2042 | call rd_find_lfn |
||
2043 | jnc @f |
||
2044 | pop edi |
||
2045 | push ERROR_FILE_NOT_FOUND |
||
2046 | .ret: |
||
2047 | pop eax |
||
2048 | ret |
||
2049 | @@: |
||
2050 | ; must not be directory |
||
2051 | test byte [edi+11], 10h |
||
2052 | jz @f |
||
2053 | pop edi |
||
2054 | jmp .access_denied |
||
2055 | @@: |
||
2056 | ; file size must not exceed 4Gb |
||
2057 | cmp dword [ebx+4], 0 |
||
2058 | jz @f |
||
2059 | pop edi |
||
2060 | push ERROR_END_OF_FILE |
||
2061 | jmp .ret |
||
2062 | @@: |
||
2063 | ; set file modification date/time to current |
||
2064 | call fat_update_datetime |
||
2065 | mov eax, [ebx] |
||
2066 | cmp eax, [edi+28] |
||
2067 | jb .truncate |
||
2068 | ja .expand |
||
2069 | pop edi |
||
2070 | xor eax, eax |
||
2071 | ret |
||
2072 | .expand: |
||
2073 | push ecx |
||
2074 | mov ecx, eax |
||
2075 | call ramdisk_extend_file |
||
2076 | pop ecx |
||
2077 | pop edi |
||
2078 | ret |
||
2079 | .truncate: |
||
2080 | mov [edi+28], eax |
||
2081 | push ecx |
||
2082 | movzx ecx, word [edi+26] |
||
2083 | test eax, eax |
||
2084 | jz .zero_size |
||
2085 | ; find new last sector |
||
2086 | @@: |
||
2087 | sub eax, 0x200 |
||
2088 | jbe @f |
||
2089 | movzx ecx, word [RAMDISK_FAT+ecx*2] |
||
2090 | jmp @b |
||
2091 | @@: |
||
2092 | ; zero data at the end of last sector |
||
2093 | push ecx |
||
2094 | mov edi, ecx |
||
2095 | shl edi, 9 |
||
2096 | lea edi, [edi+RAMDISK+31*512+eax+0x200] |
||
2097 | mov ecx, eax |
||
2098 | neg ecx |
||
2099 | xor eax, eax |
||
2100 | rep stosb |
||
2101 | pop ecx |
||
2102 | ; terminate FAT chain |
||
2103 | lea ecx, [RAMDISK_FAT+ecx+ecx] |
||
2104 | push dword [ecx] |
||
2105 | mov word [ecx], 0xFFF |
||
2106 | pop ecx |
||
2107 | and ecx, 0xFFF |
||
2108 | jmp .delete |
||
2109 | .zero_size: |
||
2110 | and word [edi+26], 0 |
||
2111 | .delete: |
||
2112 | ; delete FAT chain starting with ecx |
||
2113 | ; mark all clusters as free |
||
2114 | cmp ecx, 0xFF8 |
||
2115 | jae .deleted |
||
2116 | lea ecx, [RAMDISK_FAT+ecx+ecx] |
||
2117 | push dword [ecx] |
||
2118 | and word [ecx], 0 |
||
2119 | pop ecx |
||
2120 | and ecx, 0xFFF |
||
2121 | jmp .delete |
||
2122 | .deleted: |
||
2123 | pop ecx |
||
2124 | pop edi |
||
2125 | xor eax, eax |
||
2126 | ret |
||
2127 | |||
2128 | fs_RamdiskGetFileInfo: |
||
2129 | cmp byte [esi], 0 |
||
2130 | jnz @f |
||
2131 | mov eax, 2 ; unsupported |
||
2132 | ret |
||
2133 | @@: |
||
2134 | push edi |
||
2135 | call rd_find_lfn |
||
2136 | fs_GetFileInfo_finish: |
||
2137 | jnc @f |
||
2138 | pop edi |
||
2139 | mov eax, ERROR_FILE_NOT_FOUND |
||
2140 | ret |
||
2141 | @@: |
||
2142 | push esi ebp |
||
2143 | xor ebp, ebp |
||
2144 | mov esi, edx |
||
2145 | and dword [esi+4], 0 |
||
2146 | call fat_entry_to_bdfe2 |
||
2147 | pop ebp esi |
||
2148 | pop edi |
||
2149 | xor eax, eax |
||
2150 | ret |
||
2151 | |||
2152 | fs_RamdiskSetFileInfo: |
||
2153 | cmp byte [esi], 0 |
||
2154 | jnz @f |
||
2155 | mov eax, 2 ; unsupported |
||
2156 | ret |
||
2157 | @@: |
||
2158 | push edi |
||
2159 | call rd_find_lfn |
||
2160 | jnc @f |
||
2161 | pop edi |
||
2162 | mov eax, ERROR_FILE_NOT_FOUND |
||
2163 | ret |
||
2164 | @@: |
||
2165 | call bdfe_to_fat_entry |
||
2166 | pop edi |
||
2167 | xor eax, eax |
||
2168 | ret |
||
2169 | |||
2170 | ;---------------------------------------------------------------- |
||
2171 | ; |
||
2172 | ; fs_RamdiskDelete - delete file or empty folder from ramdisk |
||
2173 | ; |
||
2174 | ; esi points to filename |
||
2175 | ; |
||
2176 | ; ret eax = 0 ok or other = errormsg |
||
2177 | ; |
||
2178 | ;-------------------------------------------------------------- |
||
2179 | fs_RamdiskDelete: |
||
2180 | cmp byte [esi], 0 |
||
2181 | jnz @f |
||
2182 | ; cannot delete root! |
||
2183 | .access_denied: |
||
2184 | push ERROR_ACCESS_DENIED |
||
2185 | .pop_ret: |
||
2186 | pop eax |
||
2187 | ret |
||
2188 | @@: |
||
2189 | and [rd_prev_sector], 0 |
||
2190 | and [rd_prev_prev_sector], 0 |
||
2191 | push edi |
||
2192 | call rd_find_lfn |
||
2193 | jnc .found |
||
2194 | pop edi |
||
2195 | push ERROR_FILE_NOT_FOUND |
||
2196 | jmp .pop_ret |
||
2197 | .found: |
||
2198 | cmp dword [edi], '. ' |
||
2199 | jz .access_denied2 |
||
2200 | cmp dword [edi], '.. ' |
||
2201 | jz .access_denied2 |
||
2202 | test byte [edi+11], 10h |
||
2203 | jz .dodel |
||
2204 | ; we can delete only empty folders! |
||
2205 | movzx eax, word [edi+26] |
||
2206 | push ebx |
||
2207 | mov ebx, eax |
||
2208 | shl ebx, 9 |
||
2209 | add ebx, RAMDISK + 31*0x200 + 2*0x20 |
||
2210 | .checkempty: |
||
2211 | cmp byte [ebx], 0 |
||
2212 | jz .empty |
||
2213 | cmp byte [ebx], 0xE5 |
||
2214 | jnz .notempty |
||
2215 | add ebx, 0x20 |
||
2216 | test ebx, 0x1FF |
||
2217 | jnz .checkempty |
||
2218 | movzx eax, word [RAMDISK_FAT + eax*2] |
||
2219 | test eax, eax |
||
2220 | jz .empty |
||
2221 | mov ebx, eax |
||
2222 | shl ebx, 9 |
||
2223 | add ebx, RAMDISK + 31*0x200 |
||
2224 | jmp .checkempty |
||
2225 | .notempty: |
||
2226 | pop ebx |
||
2227 | .access_denied2: |
||
2228 | pop edi |
||
2229 | jmp .access_denied |
||
2230 | .empty: |
||
2231 | pop ebx |
||
2232 | .dodel: |
||
2233 | movzx eax, word [edi+26] |
||
2234 | ; delete folder entry |
||
2235 | mov byte [edi], 0xE5 |
||
2236 | ; delete LFN (if present) |
||
2237 | .lfndel: |
||
2238 | test edi, 0x1FF |
||
2239 | jnz @f |
||
2240 | cmp [rd_prev_sector], 0 |
||
2241 | jz @f |
||
2242 | cmp [rd_prev_sector], -1 |
||
2243 | jz .lfndone |
||
2244 | mov edi, [rd_prev_sector] |
||
2245 | push [rd_prev_prev_sector] |
||
2246 | pop [rd_prev_sector] |
||
2247 | or [rd_prev_prev_sector], -1 |
||
2248 | shl edi, 9 |
||
2249 | add edi, RAMDISK + 31*0x200 + 0x200 |
||
2250 | @@: |
||
2251 | sub edi, 0x20 |
||
2252 | cmp byte [edi], 0xE5 |
||
2253 | jz .lfndone |
||
2254 | cmp byte [edi+11], 0xF |
||
2255 | jnz .lfndone |
||
2256 | mov byte [edi], 0xE5 |
||
2257 | jmp .lfndel |
||
2258 | .lfndone: |
||
2259 | ; delete FAT chain |
||
2260 | test eax, eax |
||
2261 | jz .done |
||
2262 | lea eax, [RAMDISK_FAT + eax*2] |
||
2263 | push dword [eax] |
||
2264 | and word [eax], 0 |
||
2265 | pop eax |
||
2266 | and eax, 0xFFF |
||
2267 | jmp .lfndone |
||
2268 | .done: |
||
2269 | pop edi |
||
2270 | xor eax, eax |
||
2271 | ret |
||
2272 | |||
2273 | ; \end{diamond}=>=>=>=>>->-> |