Rev 78 | Rev 86 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
1 | ha | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
||
3 | ;; RAMDISK functions ;; |
||
4 | ;; (C) 2004 Ville Turjanmaa, License: GPL ;; |
||
5 | ;; Addings by M.Lisovin ;; |
||
83 | diamond | 6 | ;; LFN support by diamond ;; |
1 | ha | 7 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
8 | |||
5 | halyavin | 9 | ; calculate fat chain |
1 | ha | 10 | |
5 | halyavin | 11 | calculatefatchain: |
12 | |||
13 | pushad |
||
14 | |||
15 | mov esi,0x100000+512 |
||
16 | mov edi,0x280000 |
||
17 | |||
18 | fcnew: |
||
19 | mov eax,dword [esi] |
||
20 | mov ebx,dword [esi+4] |
||
21 | mov ecx,dword [esi+8] |
||
22 | mov edx,ecx |
||
23 | shr edx,4 ;8 ok |
||
24 | shr dx,4 ;7 ok |
||
25 | xor ch,ch |
||
26 | shld ecx,ebx,20 ;6 ok |
||
27 | shr cx,4 ;5 ok |
||
28 | shld ebx,eax,12 |
||
29 | and ebx,0x0fffffff ;4 ok |
||
30 | shr bx,4 ;3 ok |
||
31 | shl eax,4 |
||
32 | and eax,0x0fffffff ;2 ok |
||
33 | shr ax,4 ;1 ok |
||
78 | diamond | 34 | mov dword [edi],eax |
35 | mov dword [edi+4],ebx |
||
36 | mov dword [edi+8],ecx |
||
37 | mov dword [edi+12],edx |
||
38 | add edi,16 |
||
5 | halyavin | 39 | add esi,12 |
40 | |||
41 | cmp edi,0x280000+2856*2 ;2849 clusters |
||
42 | jnz fcnew |
||
43 | |||
44 | popad |
||
45 | ret |
||
46 | |||
47 | |||
48 | restorefatchain: ; restore fat chain |
||
49 | |||
50 | pushad |
||
51 | |||
52 | mov esi,0x280000 |
||
53 | mov edi,0x100000+512 |
||
54 | |||
55 | fcnew2: |
||
56 | mov eax,dword [esi] |
||
57 | mov ebx,dword [esi+4] |
||
58 | shl ax,4 |
||
59 | shl eax,4 |
||
60 | shl bx,4 |
||
61 | shr ebx,4 |
||
62 | shrd eax,ebx,8 |
||
63 | shr ebx,8 |
||
78 | diamond | 64 | mov dword [edi],eax |
65 | mov word [edi+4],bx |
||
66 | add edi,6 |
||
5 | halyavin | 67 | add esi,8 |
68 | |||
69 | cmp edi,0x100000+512+4278 ;4274 bytes - all used FAT |
||
70 | jb fcnew2 |
||
71 | |||
72 | mov esi,0x100000+512 ; duplicate fat chain |
||
73 | mov edi,0x100000+512+0x1200 |
||
74 | mov ecx,1069 ;4274/4 |
||
75 | cld |
||
76 | rep movsd |
||
77 | |||
78 | popad |
||
79 | ret |
||
80 | |||
81 | |||
1 | ha | 82 | ramdisk_free_space: |
83 | ;--------------------------------------------- |
||
84 | ; |
||
85 | ; returns free space in edi |
||
86 | ; rewr.by Mihasik |
||
87 | ;--------------------------------------------- |
||
88 | |||
89 | push eax ebx ecx |
||
90 | |||
91 | mov edi,0x280000 ;start of FAT |
||
92 | xor ax,ax ;Free cluster=0x0000 in FAT |
||
93 | xor ebx,ebx ;counter |
||
5 | halyavin | 94 | mov ecx,2849 ;2849 clusters |
1 | ha | 95 | cld |
96 | rdfs1: |
||
97 | repne scasw |
||
98 | jnz rdfs2 ;if last cluster not 0 |
||
99 | inc ebx |
||
78 | diamond | 100 | test ecx, ecx |
101 | jnz rdfs1 |
||
1 | ha | 102 | rdfs2: |
103 | shl ebx,9 ;free clusters*512 |
||
104 | mov edi,ebx |
||
105 | |||
106 | pop ecx ebx eax |
||
107 | ret |
||
108 | |||
109 | |||
110 | expand_filename: |
||
111 | ;--------------------------------------------- |
||
112 | ; |
||
113 | ; exapand filename with '.' to 11 character |
||
114 | ; eax - pointer to filename |
||
115 | ;--------------------------------------------- |
||
116 | |||
117 | push esi edi ebx |
||
118 | |||
119 | mov edi,esp ; check for '.' in the name |
||
120 | add edi,12+8 |
||
121 | |||
122 | mov esi,eax |
||
123 | |||
124 | mov eax,edi |
||
125 | mov [eax+0],dword ' ' |
||
126 | mov [eax+4],dword ' ' |
||
127 | mov [eax+8],dword ' ' |
||
128 | |||
129 | flr1: |
||
130 | |||
131 | cmp [esi],byte '.' |
||
132 | jne flr2 |
||
133 | mov edi,eax |
||
134 | add edi,7 |
||
135 | jmp flr3 |
||
136 | |||
137 | flr2: |
||
138 | |||
139 | mov bl,[esi] |
||
140 | mov [edi],bl |
||
141 | |||
142 | flr3: |
||
143 | |||
144 | inc esi |
||
145 | inc edi |
||
146 | |||
147 | mov ebx,eax |
||
148 | add ebx,11 |
||
149 | |||
150 | cmp edi,ebx |
||
151 | jbe flr1 |
||
152 | |||
153 | pop ebx edi esi |
||
154 | ret |
||
155 | |||
156 | fileread: |
||
157 | ;---------------------------------------------------------------- |
||
158 | ; |
||
159 | ; fileread - sys floppy |
||
160 | ; |
||
161 | ; eax points to filename 11 chars |
||
162 | ; ebx first wanted block ; 1+ ; if 0 then set to 1 |
||
163 | ; ecx number of blocks to read ; 1+ ; if 0 then set to 1 |
||
164 | ; edx mem location to return data |
||
165 | ; esi length of filename 12*X 0=root |
||
166 | ; |
||
167 | ; ret ebx = size or 0xffffffff file not found |
||
168 | ; eax = 0 ok read or other = errormsg |
||
169 | ; |
||
170 | ;-------------------------------------------------------------- |
||
171 | test ebx,ebx ;if ebx=0 - set to 1 |
||
172 | jnz frfl5 |
||
173 | inc ebx |
||
174 | frfl5: |
||
175 | test ecx,ecx ;if ecx=0 - set to 1 |
||
176 | jnz frfl6 |
||
177 | inc ecx |
||
178 | frfl6: |
||
179 | test esi,esi ; return ramdisk root |
||
180 | jnz fr_noroot ;if not root |
||
181 | cmp ebx,14 ;14 clusters=root dir |
||
182 | ja oorr |
||
183 | cmp ecx,14 |
||
184 | ja oorr |
||
185 | jmp fr_do |
||
186 | oorr: |
||
187 | mov eax,5 ;out of root range (fnf) |
||
188 | xor ebx,ebx |
||
189 | dec ebx ;0xffffffff |
||
190 | ret |
||
191 | |||
192 | fr_do: ;reading rootdir |
||
193 | mov edi,edx |
||
194 | dec ebx |
||
195 | push edx |
||
196 | mov edx,ecx |
||
197 | add edx,ebx |
||
5 | halyavin | 198 | cmp edx,15 ;ebx+ecx=14+1 |
1 | ha | 199 | pushf |
200 | jbe fr_do1 |
||
201 | sub edx,14 |
||
202 | sub ecx,edx |
||
203 | fr_do1: |
||
204 | shl ebx,9 |
||
205 | mov esi,0x100000+512*19 |
||
206 | add esi,ebx |
||
207 | shl ecx,7 |
||
208 | cld |
||
209 | rep movsd |
||
210 | popf |
||
211 | pop edx |
||
5 | halyavin | 212 | jae fr_do2 |
1 | ha | 213 | xor eax,eax ; ok read |
214 | xor ebx,ebx |
||
215 | ret |
||
216 | fr_do2: ;if last cluster |
||
217 | mov eax,6 ;end of file |
||
218 | xor ebx,ebx |
||
219 | ret |
||
220 | |||
221 | fr_noroot: |
||
222 | |||
223 | sub esp,32 |
||
224 | call expand_filename |
||
225 | |||
226 | dec ebx |
||
227 | |||
228 | push eax |
||
229 | |||
230 | push eax ebx ecx edx esi edi |
||
231 | call rd_findfile |
||
232 | je fifound |
||
233 | add esp,32+28 ;if file not found |
||
234 | ret |
||
235 | |||
236 | fifound: |
||
237 | |||
238 | mov ebx,[edi-11+28] ;file size |
||
239 | mov [esp+20],ebx |
||
240 | mov [esp+24],ebx |
||
241 | add edi,0xf |
||
242 | movzx eax,word [edi] |
||
243 | mov edi,eax ;edi=cluster |
||
244 | |||
245 | frnew: |
||
246 | |||
247 | add eax,31 ;bootsector+2*fat+filenames |
||
248 | shl eax,9 ;*512 |
||
249 | add eax,0x100000 ;image base |
||
250 | mov ebx,[esp+8] |
||
251 | mov ecx,512 ;[esp+4] |
||
252 | |||
253 | cmp [esp+16],dword 0 ; wanted cluster ? |
||
254 | jne frfl7 |
||
255 | call memmove |
||
256 | add [esp+8],dword 512 |
||
257 | dec dword [esp+12] ; last wanted cluster ? |
||
258 | je frnoread |
||
259 | jmp frfl8 |
||
260 | frfl7: |
||
261 | dec dword [esp+16] |
||
262 | frfl8: |
||
71 | diamond | 263 | movzx eax,word [edi*2+0x280000] ; find next cluster from FAT |
1 | ha | 264 | mov edi,eax |
265 | cmp edi,4095 ;eof - cluster |
||
266 | jz frnoread2 |
||
267 | |||
268 | cmp [esp+24],dword 512 ;eof - size |
||
269 | jb frnoread |
||
270 | sub [esp+24],dword 512 |
||
271 | |||
272 | jmp frnew |
||
273 | |||
274 | frnoread2: |
||
275 | |||
276 | cmp [esp+16],dword 0 ; eof without read ? |
||
277 | je frnoread |
||
278 | |||
279 | pop edi esi edx ecx |
||
280 | add esp,4 |
||
281 | pop ebx ; ebx <- eax : size of file |
||
282 | add esp,36 |
||
283 | mov eax,6 ; end of file |
||
284 | ret |
||
285 | |||
286 | frnoread: |
||
287 | |||
288 | pop edi esi edx ecx |
||
289 | add esp,4 |
||
290 | pop ebx ; ebx <- eax : size of file |
||
291 | add esp,36 |
||
292 | xor eax,eax ;read ok |
||
293 | ret |
||
294 | |||
295 | filedelete: |
||
296 | ;-------------------------------------------- |
||
297 | ; |
||
298 | ; filedelete - sys floppy |
||
299 | ; in: |
||
300 | ; eax - pointer to filename 11 chars |
||
301 | ; |
||
302 | ; out: |
||
303 | ; eax - 0 = successful, 5 = file not found |
||
304 | ; |
||
305 | ;-------------------------------------------- |
||
306 | |||
307 | sub esp,32 |
||
308 | call expand_filename |
||
309 | |||
310 | push eax ebx ecx edx esi edi |
||
311 | |||
312 | call rd_findfile |
||
313 | je fifoundd |
||
314 | pop edi esi edx ecx ebx eax ;file not found |
||
315 | add esp,32 |
||
316 | mov eax,5 |
||
317 | ret |
||
318 | |||
319 | fifoundd: |
||
320 | |||
321 | mov [edi-11],byte 0xE5 ;mark filename deleted |
||
322 | add edi,0xf |
||
323 | movzx eax,word [edi] |
||
324 | mov edi,eax ;edi = cluster |
||
325 | |||
326 | frnewd: |
||
327 | |||
328 | shl edi,1 ;find next cluster from FAT |
||
329 | add edi,0x280000 |
||
330 | movzx eax,word [edi] |
||
331 | mov [edi],word 0x0 ;clear fat chain cluster |
||
332 | mov edi,eax |
||
333 | cmp edi,dword 0xff8 ;last cluster ? |
||
334 | jb frnewd |
||
335 | |||
336 | pop edi esi edx ecx ebx eax |
||
337 | add esp,32 |
||
338 | xor eax,eax ; file found |
||
339 | ret |
||
340 | |||
341 | |||
342 | |||
343 | filesave: |
||
344 | ;---------------------------------------------------------- |
||
345 | ; |
||
346 | ; filesave - sys floppy |
||
347 | ; |
||
348 | ; eax points to filename 11 chars |
||
349 | ; |
||
350 | ; eax ; pointer to file name |
||
351 | ; ebx ; buffer |
||
352 | ; ecx ; count to write in bytes |
||
353 | ; edx ; 0 create new , 1 append |
||
354 | ; |
||
355 | ;----------------------------------------------------------- |
||
356 | |||
357 | sub esp,32 |
||
358 | call expand_filename |
||
359 | test edx,edx |
||
360 | jnz fsdel |
||
361 | pusha |
||
362 | call filedelete |
||
363 | popa |
||
364 | |||
365 | fsdel: |
||
366 | |||
367 | call ramdisk_free_space |
||
368 | cmp ecx,edi |
||
369 | jbe rd_do_save |
||
370 | add esp,32 |
||
371 | mov eax,8 ;disk full |
||
372 | ret |
||
373 | |||
374 | rd_do_save: |
||
375 | |||
376 | push eax ebx ecx edx esi edi |
||
377 | |||
378 | mov edi,0x100000+512*18+512 ;Point at directory |
||
379 | mov edx,224 +1 |
||
380 | ; find an empty spot for filename in the root dir |
||
381 | l20ds: |
||
382 | dec edx |
||
383 | jz frnoreadds |
||
384 | l21ds: |
||
385 | cmp [edi],byte 0xE5 |
||
386 | jz fifoundds |
||
387 | cmp [edi],byte 0x0 |
||
388 | jz fifoundds |
||
389 | add edi,32 ; Advance to next entry |
||
390 | jmp l20ds |
||
391 | fifoundds: |
||
392 | |||
393 | push edi ; move the filename to root dir |
||
394 | mov esi,[esp+4+20] |
||
395 | mov ecx,11 |
||
396 | cld |
||
397 | rep movsb |
||
398 | pop edi |
||
399 | mov edx,edi |
||
400 | add edx,11+0xf ; edx <- cluster save position |
||
401 | mov ebx,[esp+12] ; save file size |
||
402 | mov [edi+28],ebx |
||
403 | mov [edi+11],byte 0x20 ; attribute |
||
404 | ; Ivan Poddubny 11/12/2003: |
||
405 | call get_date_for_file ; from FAT32.INC |
||
406 | mov [edi+24],ax ; date |
||
407 | call get_time_for_file ; from FAT32.INC |
||
408 | mov [edi+22],ax ; time |
||
409 | ; End |
||
410 | mov edi,0x280000 ;pointer to first cluster |
||
411 | mov ecx,2849 |
||
412 | cld |
||
413 | frnewds: |
||
414 | xor ax,ax |
||
415 | repne scasw |
||
416 | mov ebx,2848 |
||
417 | sub ebx,ecx |
||
418 | mov [edx],bx ; save next cluster pos. to prev cl. |
||
419 | mov edx,edi ; next save pos abs mem add |
||
420 | dec edx |
||
421 | dec edx |
||
422 | call fdc_filesave |
||
423 | pusha ; move save to floppy cluster |
||
424 | add ebx,31 |
||
425 | shl ebx,9 |
||
426 | add ebx,0x100000 |
||
427 | mov eax,[esp+32+16] |
||
428 | mov ecx,512 |
||
429 | call memmove |
||
430 | popa |
||
431 | |||
432 | mov eax,[esp+12] |
||
433 | cmp eax,512 |
||
48 | halyavin | 434 | jbe flnsa |
1 | ha | 435 | sub eax,512 |
436 | mov [esp+12],eax |
||
78 | diamond | 437 | add dword [esp+16], 512 |
1 | ha | 438 | jmp frnewds |
439 | |||
440 | flnsa: |
||
78 | diamond | 441 | mov [edi-2],word 4095 ; mark end of file - last cluster |
1 | ha | 442 | |
443 | frnoreadds: |
||
444 | |||
445 | pop edi esi edx ecx ebx eax |
||
446 | add esp,32 |
||
447 | |||
19 | mario79 | 448 | ; pusha |
449 | ; cli |
||
450 | ; call fdc_commitfile |
||
451 | ; sti |
||
452 | ; popa |
||
1 | ha | 453 | |
454 | xor eax,eax ;ok write |
||
455 | ret |
||
456 | |||
457 | rd_findfile: |
||
458 | ;by Mihasik |
||
459 | ;IN: eax - pointer to filename OUT: filestring+11 in edi or notZero in flags and fnf in eax,ebx |
||
460 | |||
461 | mov edi,0x100000+512*18+512 ;Point at directory |
||
462 | cld |
||
463 | rd_newsearch: |
||
464 | mov esi,eax |
||
465 | mov ecx,11 |
||
466 | rep cmpsb |
||
467 | je rd_ff |
||
468 | add cl,21 |
||
469 | add edi,ecx |
||
470 | cmp edi,0x100000+512*33 |
||
471 | jb rd_newsearch |
||
472 | mov eax,5 ;if file not found - eax=5 |
||
473 | xor ebx,ebx |
||
474 | dec ebx ;ebx=0xffffffff and zf=0 |
||
475 | rd_ff: |
||
476 | ret |
||
477 | |||
478 | rd_getfileinfo: |
||
479 | ;get date, time, size or attributes of file |
||
480 | ;IN: eax - pointer to file, ebx - type of function: 12-get filesize, 13-get fileattr, 14-get filedate |
||
481 | ;ecx - filelengh 0=root |
||
482 | ;OUT: eax=0 - Ok or 5 - file not found ebx - date/time, size or attributes |
||
483 | test ecx,ecx |
||
484 | jnz no_getfinfo_root |
||
485 | mov eax,5 ;if root - fnf |
||
486 | xor ebx,ebx |
||
487 | dec ebx |
||
488 | ret |
||
489 | no_getfinfo_root: ;if not root |
||
490 | sub esp,32 |
||
491 | call expand_filename |
||
492 | call rd_findfile |
||
493 | je fifoundi |
||
494 | add esp,32 ;if file not found |
||
495 | ret |
||
496 | fifoundi: |
||
497 | cmp ebx,13 |
||
498 | jne no_rd_attr |
||
499 | movzx ebx,byte [edi] ;get attributes |
||
500 | jmp rd_getfileinfo_end |
||
501 | no_rd_attr: |
||
502 | cmp ebx,14 |
||
503 | jne no_rd_date |
||
504 | mov ebx,dword [edi+11] ;get date/time |
||
505 | jmp rd_getfileinfo_end |
||
506 | no_rd_date: |
||
507 | mov ebx,dword [edi+17] ;get size |
||
508 | rd_getfileinfo_end: |
||
509 | xor eax,eax |
||
510 | add esp,32 |
||
71 | diamond | 511 | ret |
512 | |||
513 | ; \begin{diamond} |
||
514 | |||
515 | uni2ansi_str: |
||
516 | ; convert UNICODE zero-terminated string to ASCII-string (codepage 866) |
||
517 | ; in: esi->source, edi->buffer (may be esi=edi) |
||
518 | ; destroys: eax,esi,edi |
||
83 | diamond | 519 | lodsw |
520 | test ax, ax |
||
521 | jz .done |
||
522 | cmp ax, 0x80 |
||
523 | jb .ascii |
||
524 | cmp ax, 0x401 |
||
525 | jz .yo1 |
||
526 | cmp ax, 0x451 |
||
527 | jz .yo2 |
||
528 | cmp ax, 0x410 |
||
529 | jb .unk |
||
530 | cmp ax, 0x440 |
||
531 | jb .rus1 |
||
532 | cmp ax, 0x450 |
||
533 | jb .rus2 |
||
71 | diamond | 534 | .unk: |
83 | diamond | 535 | mov al, '_' |
536 | jmp .doit |
||
71 | diamond | 537 | .yo1: |
83 | diamond | 538 | mov al, 'ð' |
539 | jmp .doit |
||
71 | diamond | 540 | .yo2: |
83 | diamond | 541 | mov al, 'ñ' |
542 | jmp .doit |
||
71 | diamond | 543 | .rus1: |
544 | ; 0x410-0x43F -> 0x80-0xAF |
||
83 | diamond | 545 | add al, 0x70 |
546 | jmp .doit |
||
71 | diamond | 547 | .rus2: |
75 | diamond | 548 | ; 0x440-0x44F -> 0xE0-0xEF |
83 | diamond | 549 | add al, 0xA0 |
71 | diamond | 550 | .ascii: |
551 | .doit: |
||
83 | diamond | 552 | stosb |
553 | jmp uni2ansi_str |
||
71 | diamond | 554 | .done: |
83 | diamond | 555 | mov byte [edi], 0 |
556 | ret |
||
71 | diamond | 557 | |
75 | diamond | 558 | ansi2uni_char: |
559 | ; convert ANSI character in al to UNICODE character in ax, using cp866 encoding |
||
560 | mov ah, 0 |
||
561 | ; 0x00-0x7F - trivial map |
||
562 | cmp al, 0x80 |
||
563 | jb .ret |
||
564 | ; 0x80-0xAF -> 0x410-0x43F |
||
565 | cmp al, 0xB0 |
||
566 | jae @f |
||
567 | add ax, 0x410-0x80 |
||
568 | .ret: |
||
569 | ret |
||
570 | @@: |
||
571 | ; 0xE0-0xEF -> 0x440-0x44F |
||
572 | cmp al, 0xE0 |
||
573 | jb .unk |
||
574 | cmp al, 0xF0 |
||
575 | jae @f |
||
576 | add ax, 0x440-0xE0 |
||
577 | ret |
||
578 | ; 0xF0 -> 0x401 |
||
579 | ; 0xF1 -> 0x451 |
||
580 | @@: |
||
581 | cmp al, 'ð' |
||
582 | jz .yo1 |
||
583 | cmp al, 'ñ' |
||
584 | jz .yo2 |
||
585 | .unk: |
||
586 | mov al, '_' ; ah=0 |
||
587 | ret |
||
588 | .yo1: |
||
589 | mov ax, 0x401 |
||
590 | ret |
||
591 | .yo2: |
||
592 | mov ax, 0x451 |
||
593 | ret |
||
594 | |||
71 | diamond | 595 | char_toupper: |
596 | ; convert character to uppercase, using cp866 encoding |
||
597 | ; in: al=symbol |
||
598 | ; out: al=converted symbol |
||
83 | diamond | 599 | cmp al, 'a' |
600 | jb .ret |
||
601 | cmp al, 'z' |
||
602 | jbe .az |
||
603 | cmp al, ' ' |
||
604 | jb .ret |
||
605 | cmp al, 'à' |
||
606 | jb .rus1 |
||
607 | cmp al, 'ï' |
||
608 | ja .ret |
||
71 | diamond | 609 | ; 0xE0-0xEF -> 0x90-0x9F |
83 | diamond | 610 | sub al, 'à'-'' |
71 | diamond | 611 | .ret: |
83 | diamond | 612 | ret |
71 | diamond | 613 | .rus1: |
614 | ; 0xA0-0xAF -> 0x80-0x8F |
||
615 | .az: |
||
83 | diamond | 616 | and al, not 0x20 |
617 | ret |
||
71 | diamond | 618 | |
619 | fat_get_name: |
||
620 | ; in: edi->FAT entry |
||
621 | ; out: CF=1 - no valid entry |
||
622 | ; else CF=0 and ebp->ASCIIZ-name |
||
623 | ; (maximum length of filename is 255 (wide) symbols without trailing 0, |
||
624 | ; but implementation requires buffer 261 words) |
||
625 | ; destroys eax |
||
83 | diamond | 626 | cmp byte [edi], 0 |
627 | jz .no |
||
628 | cmp byte [edi], 0xE5 |
||
629 | jnz @f |
||
71 | diamond | 630 | .no: |
83 | diamond | 631 | stc |
632 | ret |
||
71 | diamond | 633 | @@: |
83 | diamond | 634 | cmp byte [edi+11], 0xF |
635 | jz .longname |
||
636 | push ecx |
||
637 | mov ecx, 8 |
||
638 | push edi ebp ecx |
||
78 | diamond | 639 | test byte [ebp-4], 1 |
75 | diamond | 640 | jnz .unicode_short |
71 | diamond | 641 | @@: |
83 | diamond | 642 | mov al, [edi] |
643 | inc edi |
||
644 | mov [ebp], al |
||
645 | inc ebp |
||
646 | loop @b |
||
647 | pop ecx |
||
71 | diamond | 648 | @@: |
83 | diamond | 649 | cmp byte [ebp-1], ' ' |
650 | jnz @f |
||
651 | dec ebp |
||
652 | loop @b |
||
71 | diamond | 653 | @@: |
83 | diamond | 654 | mov byte [ebp], '.' |
655 | inc ebp |
||
656 | mov ecx, 3 |
||
657 | push ecx |
||
71 | diamond | 658 | @@: |
83 | diamond | 659 | mov al, [edi] |
660 | inc edi |
||
661 | mov [ebp], al |
||
662 | inc ebp |
||
663 | loop @b |
||
664 | pop ecx |
||
71 | diamond | 665 | @@: |
83 | diamond | 666 | cmp byte [ebp-1], ' ' |
667 | jnz @f |
||
668 | dec ebp |
||
669 | loop @b |
||
670 | dec ebp |
||
71 | diamond | 671 | @@: |
83 | diamond | 672 | and byte [ebp], 0 ; CF=0 |
673 | pop ebp edi ecx |
||
674 | ret |
||
75 | diamond | 675 | .unicode_short: |
676 | @@: |
||
677 | mov al, [edi] |
||
678 | inc edi |
||
679 | call ansi2uni_char |
||
680 | mov [ebp], ax |
||
681 | inc ebp |
||
682 | inc ebp |
||
683 | loop @b |
||
684 | pop ecx |
||
685 | @@: |
||
83 | diamond | 686 | cmp word [ebp-2], ' ' |
687 | jnz @f |
||
688 | dec ebp |
||
689 | dec ebp |
||
690 | loop @b |
||
75 | diamond | 691 | @@: |
83 | diamond | 692 | mov word [ebp], '.' |
693 | inc ebp |
||
694 | inc ebp |
||
695 | mov ecx, 3 |
||
696 | push ecx |
||
75 | diamond | 697 | @@: |
83 | diamond | 698 | mov al, [edi] |
699 | inc edi |
||
700 | call ansi2uni_char |
||
701 | mov [ebp], ax |
||
75 | diamond | 702 | inc ebp |
703 | inc ebp |
||
704 | loop @b |
||
705 | pop ecx |
||
706 | @@: |
||
83 | diamond | 707 | cmp word [ebp-2], ' ' |
708 | jnz @f |
||
709 | dec ebp |
||
710 | dec ebp |
||
711 | loop @b |
||
712 | dec ebp |
||
713 | dec ebp |
||
75 | diamond | 714 | @@: |
83 | diamond | 715 | and word [ebp], 0 ; CF=0 |
716 | pop ebp edi ecx |
||
717 | ret |
||
71 | diamond | 718 | .longname: |
719 | ; LFN |
||
83 | diamond | 720 | mov al, byte [edi] |
721 | and eax, 0x3F |
||
722 | dec eax |
||
723 | cmp al, 20 |
||
724 | jae .no ; ignore invalid entries |
||
725 | mov word [ebp+260*2], 0 ; force null-terminating for orphans |
||
726 | imul eax, 13*2 |
||
727 | add ebp, eax |
||
728 | test byte [edi], 0x40 |
||
729 | jz @f |
||
730 | mov word [ebp+13*2], 0 |
||
71 | diamond | 731 | @@: |
83 | diamond | 732 | push eax |
71 | diamond | 733 | ; now copy name from edi to ebp ... |
83 | diamond | 734 | mov eax, [edi+1] |
735 | mov [ebp], eax ; symbols 1,2 |
||
736 | mov eax, [edi+5] |
||
737 | mov [ebp+4], eax ; 3,4 |
||
738 | mov eax, [edi+9] |
||
739 | mov [ebp+8], ax ; 5 |
||
740 | mov eax, [edi+14] |
||
741 | mov [ebp+10], eax ; 6,7 |
||
742 | mov eax, [edi+18] |
||
743 | mov [ebp+14], eax ; 8,9 |
||
744 | mov eax, [edi+22] |
||
745 | mov [ebp+18], eax ; 10,11 |
||
746 | mov eax, [edi+28] |
||
747 | mov [ebp+22], eax ; 12,13 |
||
71 | diamond | 748 | ; ... done |
83 | diamond | 749 | pop eax |
750 | sub ebp, eax |
||
751 | test eax, eax |
||
752 | jz @f |
||
71 | diamond | 753 | ; if this is not first entry, more processing required |
83 | diamond | 754 | stc |
755 | ret |
||
71 | diamond | 756 | @@: |
757 | ; if this is first entry: |
||
78 | diamond | 758 | test byte [ebp-4], 1 |
75 | diamond | 759 | jnz .ret |
71 | diamond | 760 | ; buffer at ebp contains UNICODE name, convert it to ANSI |
83 | diamond | 761 | push esi edi |
762 | mov esi, ebp |
||
763 | mov edi, ebp |
||
764 | call uni2ansi_str |
||
765 | pop edi esi |
||
75 | diamond | 766 | .ret: |
83 | diamond | 767 | clc |
768 | ret |
||
71 | diamond | 769 | |
770 | fat_compare_name: |
||
771 | ; compares ASCIIZ-names, case-insensitive (cp866 encoding) |
||
772 | ; in: esi->name, ebp->name |
||
773 | ; out: if names match: ZF=1 and esi->next component of name |
||
774 | ; else: ZF=0, esi is not changed |
||
775 | ; destroys eax |
||
83 | diamond | 776 | push ebp esi |
71 | diamond | 777 | .loop: |
83 | diamond | 778 | mov al, [ebp] |
779 | inc ebp |
||
780 | call char_toupper |
||
781 | push eax |
||
782 | lodsb |
||
783 | call char_toupper |
||
784 | cmp al, [esp] |
||
785 | jnz .done |
||
786 | pop eax |
||
787 | test al, al |
||
788 | jnz .loop |
||
789 | dec esi |
||
790 | pop eax |
||
791 | pop ebp |
||
792 | xor eax, eax ; set ZF flag |
||
793 | ret |
||
71 | diamond | 794 | .done: |
83 | diamond | 795 | cmp al, '/' |
796 | jnz @f |
||
797 | cmp byte [esp], 0 |
||
798 | jnz @f |
||
799 | mov [esp+4], esi |
||
71 | diamond | 800 | @@: |
83 | diamond | 801 | pop eax |
802 | pop esi ebp |
||
803 | ret |
||
71 | diamond | 804 | |
75 | diamond | 805 | fat_time_to_bdfe: |
806 | ; in: eax=FAT time |
||
807 | ; out: eax=BDFE time |
||
83 | diamond | 808 | push ecx edx |
809 | mov ecx, eax |
||
810 | mov edx, eax |
||
811 | shr eax, 11 |
||
812 | shl eax, 16 ; hours |
||
813 | and edx, 0x1F |
||
814 | add edx, edx |
||
815 | mov al, dl ; seconds |
||
816 | shr ecx, 5 |
||
817 | and ecx, 0x3F |
||
818 | mov ah, cl ; minutes |
||
819 | pop edx ecx |
||
820 | ret |
||
75 | diamond | 821 | |
822 | fat_date_to_bdfe: |
||
83 | diamond | 823 | push ecx edx |
824 | mov ecx, eax |
||
825 | mov edx, eax |
||
826 | shr eax, 9 |
||
827 | add ax, 1980 |
||
828 | shl eax, 16 ; year |
||
829 | and edx, 0x1F |
||
830 | mov al, dl ; day |
||
831 | shr ecx, 5 |
||
832 | and ecx, 0xF |
||
833 | mov ah, cl ; month |
||
834 | pop edx ecx |
||
835 | ret |
||
75 | diamond | 836 | |
837 | fat_entry_to_bdfe: |
||
838 | ; convert FAT entry at edi to BDFE (block of data of folder entry) at esi, advance esi |
||
839 | ; destroys eax |
||
840 | movzx eax, byte [edi+11] |
||
841 | mov [esi], eax ; attributes |
||
842 | mov eax, [ebp-4] |
||
843 | mov [esi+4], eax ; ASCII/UNICODE name |
||
844 | movzx eax, word [edi+14] |
||
845 | call fat_time_to_bdfe |
||
846 | mov [esi+8], eax ; creation time |
||
847 | movzx eax, word [edi+16] |
||
848 | call fat_date_to_bdfe |
||
849 | mov [esi+12], eax ; creation date |
||
850 | and dword [esi+16], 0 ; last access time is not supported on FAT |
||
851 | movzx eax, word [edi+18] |
||
852 | call fat_date_to_bdfe |
||
853 | mov [esi+20], eax ; last access date |
||
854 | movzx eax, word [edi+22] |
||
855 | call fat_time_to_bdfe |
||
856 | mov [esi+24], eax ; last write time |
||
857 | movzx eax, word [edi+24] |
||
858 | call fat_date_to_bdfe |
||
859 | mov [esi+28], eax ; last write date |
||
860 | mov eax, [edi+28] |
||
861 | mov [esi+32], eax ; file size (low dword) |
||
862 | xor eax, eax |
||
863 | mov [esi+36], eax ; file size (high dword) |
||
864 | push ecx edi |
||
865 | lea edi, [esi+40] |
||
866 | mov esi, ebp |
||
78 | diamond | 867 | test byte [esi-4], 1 |
868 | jz .ansi |
||
869 | mov ecx, 260/2 |
||
75 | diamond | 870 | rep movsd |
78 | diamond | 871 | mov [edi-2], ax |
872 | @@: |
||
75 | diamond | 873 | mov esi, edi |
874 | pop edi ecx |
||
875 | ret |
||
78 | diamond | 876 | .ansi: |
877 | mov ecx, 264/4 |
||
878 | rep movsd |
||
879 | mov [edi-1], al |
||
880 | jmp @b |
||
75 | diamond | 881 | |
71 | diamond | 882 | rd_find_lfn: |
883 | ; in: esi->name |
||
884 | ; out: CF=1 - file not found |
||
885 | ; else CF=0 and edi->direntry |
||
78 | diamond | 886 | push esi ebp edi |
887 | sub esp, 262*2 ; allocate space for LFN |
||
888 | mov ebp, esp ; ebp points to buffer |
||
889 | push 0 ; for fat_get_name: read ASCII name |
||
890 | mov edi, 0x100000+512*19 ; to root dir |
||
71 | diamond | 891 | .l1: |
78 | diamond | 892 | call fat_get_name |
893 | jc .l2 |
||
894 | call fat_compare_name |
||
895 | jz .found |
||
71 | diamond | 896 | .l2: |
78 | diamond | 897 | add edi, 0x20 |
898 | cmp edi, 0x100000+512*33 |
||
899 | jb .l1 |
||
71 | diamond | 900 | .notfound: |
78 | diamond | 901 | add esp, 262*2+4 |
902 | pop edi ebp esi |
||
903 | stc |
||
904 | ret |
||
71 | diamond | 905 | .found: |
906 | ; found |
||
907 | ; if this is LFN entry, advance to true entry |
||
78 | diamond | 908 | cmp byte [edi+11], 0xF |
909 | jnz @f |
||
910 | add edi, 0x20 |
||
71 | diamond | 911 | @@: |
912 | ; folders are not supported |
||
78 | diamond | 913 | cmp byte [esi], 0 |
914 | jnz .notfound |
||
915 | add esp, 262*2+4+4 ; CF=0 |
||
916 | pop ebp esi |
||
917 | ret |
||
71 | diamond | 918 | |
919 | ;---------------------------------------------------------------- |
||
920 | ; |
||
921 | ; fs_RamdiskRead - LFN variant for reading sys floppy |
||
922 | ; |
||
923 | ; esi points to filename |
||
924 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
925 | ; may be ebx=0 - start from first byte |
||
926 | ; ecx number of bytes to read, 0+ |
||
927 | ; edx mem location to return data |
||
928 | ; |
||
77 | diamond | 929 | ; ret ebx = bytes read or 0xffffffff file not found |
71 | diamond | 930 | ; eax = 0 ok read or other = errormsg |
931 | ; |
||
932 | ;-------------------------------------------------------------- |
||
933 | fs_RamdiskRead: |
||
75 | diamond | 934 | cmp byte [esi], 0 |
935 | jnz @f |
||
936 | or ebx, -1 |
||
937 | mov eax, 10 ; access denied |
||
938 | ret |
||
71 | diamond | 939 | @@: |
75 | diamond | 940 | push edi |
941 | call rd_find_lfn |
||
942 | jnc .found |
||
943 | pop edi |
||
944 | or ebx, -1 |
||
945 | mov eax, 5 ; file not found |
||
946 | ret |
||
71 | diamond | 947 | .found: |
75 | diamond | 948 | test ebx, ebx |
949 | jz .l1 |
||
950 | cmp dword [ebx+4], 0 |
||
951 | jz @f |
||
77 | diamond | 952 | xor ebx, ebx |
71 | diamond | 953 | .reteof: |
75 | diamond | 954 | mov eax, 6 ; EOF |
955 | pop edi |
||
956 | ret |
||
71 | diamond | 957 | @@: |
75 | diamond | 958 | mov ebx, [ebx] |
71 | diamond | 959 | .l1: |
77 | diamond | 960 | push ecx edx |
961 | push 0 |
||
962 | mov eax, [edi+28] |
||
963 | sub eax, ebx |
||
964 | jb .eof |
||
965 | cmp eax, ecx |
||
966 | jae @f |
||
967 | mov ecx, eax |
||
968 | mov byte [esp], 6 ; EOF |
||
969 | @@: |
||
75 | diamond | 970 | movzx edi, word [edi+26] ; cluster |
71 | diamond | 971 | .new: |
75 | diamond | 972 | jecxz .done |
973 | test edi, edi |
||
974 | jz .eof |
||
975 | cmp edi, 0xFF8 |
||
976 | jae .eof |
||
977 | lea eax, [edi+31] ; bootsector+2*fat+filenames |
||
978 | shl eax, 9 ; *512 |
||
979 | add eax, 0x100000 ; image base |
||
71 | diamond | 980 | ; now eax points to data of cluster |
75 | diamond | 981 | sub ebx, 512 |
982 | jae .skip |
||
983 | lea eax, [eax+ebx+512] |
||
984 | neg ebx |
||
985 | push ecx |
||
986 | cmp ecx, ebx |
||
987 | jbe @f |
||
988 | mov ecx, ebx |
||
71 | diamond | 989 | @@: |
75 | diamond | 990 | mov ebx, edx |
991 | call memmove |
||
992 | add edx, ecx |
||
993 | sub [esp], ecx |
||
994 | pop ecx |
||
995 | xor ebx, ebx |
||
71 | diamond | 996 | .skip: |
75 | diamond | 997 | movzx edi, word [edi*2+0x280000] ; find next cluster from FAT |
998 | jmp .new |
||
71 | diamond | 999 | .eof: |
77 | diamond | 1000 | mov ebx, edx |
1001 | pop eax edx ecx |
||
1002 | sub ebx, edx |
||
75 | diamond | 1003 | jmp .reteof |
71 | diamond | 1004 | .done: |
77 | diamond | 1005 | mov ebx, edx |
1006 | pop eax edx ecx edi |
||
1007 | sub ebx, edx |
||
75 | diamond | 1008 | ret |
71 | diamond | 1009 | |
75 | diamond | 1010 | ;---------------------------------------------------------------- |
1011 | ; |
||
1012 | ; fs_RamdiskReadFolder - LFN variant for reading sys floppy folder |
||
1013 | ; |
||
1014 | ; esi points to filename; only root is folder on ramdisk |
||
78 | diamond | 1015 | ; ebx pointer to structure 32-bit number = first wanted block |
1016 | ; & flags (bitfields) |
||
1017 | ; flags: bit 0: 0=ANSI names, 1=UNICODE names |
||
75 | diamond | 1018 | ; ecx number of blocks to read, 0+ |
1019 | ; edx mem location to return data |
||
1020 | ; |
||
1021 | ; ret ebx = size or 0xffffffff file not found |
||
1022 | ; eax = 0 ok read or other = errormsg |
||
1023 | ; |
||
1024 | ;-------------------------------------------------------------- |
||
1025 | fs_RamdiskReadFolder: |
||
1026 | cmp byte [esi], 0 |
||
1027 | jz @f |
||
1028 | ; ramdisk doesn't support folders |
||
1029 | mov eax, ERROR_ACCESS_DENIED |
||
1030 | or ebx, -1 |
||
1031 | ret |
||
1032 | @@: |
||
1033 | push esi edi ecx |
||
1034 | ; init header |
||
1035 | push ecx |
||
1036 | mov edi, edx |
||
1037 | mov ecx, 32/4 |
||
1038 | xor eax, eax |
||
1039 | rep stosd |
||
1040 | mov byte [edx], 1 ; version |
||
1041 | pop ecx |
||
1042 | push ebp |
||
1043 | sub esp, 262*2 ; allocate space for LFN |
||
1044 | mov ebp, esp |
||
78 | diamond | 1045 | push dword [ebx+4] ; for fat_get_name: read ANSI/UNICODE name |
1046 | mov ebx, [ebx] |
||
75 | diamond | 1047 | ; read root |
1048 | mov esi, edi ; esi points to block of data of folder entry (BDFE) |
||
1049 | mov edi, 0x100000+512*19 |
||
1050 | .l1: |
||
1051 | call fat_get_name |
||
1052 | jc .l2 |
||
1053 | cmp byte [edi+11], 0xF |
||
1054 | jnz @f |
||
1055 | add edi, 0x20 |
||
1056 | @@: |
||
1057 | inc dword [edx+8] ; new file found |
||
1058 | dec ebx |
||
1059 | jns .l2 |
||
1060 | dec ecx |
||
1061 | js .l2 |
||
1062 | inc dword [edx+4] ; new file block copied |
||
1063 | call fat_entry_to_bdfe |
||
1064 | .l2: |
||
1065 | add edi, 0x20 |
||
1066 | cmp edi, 0x100000+512*33 |
||
1067 | jb .l1 |
||
1068 | add esp, 262*2+4 |
||
1069 | pop ebp |
||
77 | diamond | 1070 | mov ebx, [edx+4] |
75 | diamond | 1071 | xor eax, eax |
1072 | dec ecx |
||
1073 | js @f |
||
1074 | mov al, ERROR_END_OF_FILE |
||
1075 | @@: |
||
1076 | pop ecx edi esi |
||
1077 | ret |
||
1078 | |||
83 | diamond | 1079 | iglobal |
1080 | label fat_legal_chars byte |
||
1081 | ; 0 = not allowed |
||
1082 | ; 1 = allowed only in long names |
||
1083 | ; 3 = allowed |
||
1084 | times 32 db 0 |
||
1085 | ; ! " # $ % & ' ( ) * + , - . / |
||
1086 | db 1,3,0,3,3,3,3,3,3,3,0,1,1,3,3,0 |
||
1087 | ; 0 1 2 3 4 5 6 7 8 9 : ; < = > ? |
||
1088 | db 3,3,3,3,3,3,3,3,3,3,0,1,0,1,0,0 |
||
1089 | ; @ A B C D E F G H I J K L M N O |
||
1090 | db 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 |
||
1091 | ; P Q R S T U V W X Y Z [ \ ] ^ _ |
||
1092 | db 3,3,3,3,3,3,3,3,3,3,3,1,0,1,3,3 |
||
1093 | ; ` a b c d e f g h i j k l m n o |
||
1094 | db 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 |
||
1095 | ; p q r s t u v w x y z { | } ~ |
||
1096 | db 3,3,3,3,3,3,3,3,3,3,3,3,0,3,3,0 |
||
1097 | endg |
||
1098 | |||
1099 | fat_name_is_legal: |
||
1100 | ; in: esi->(long) name |
||
1101 | ; out: CF set <=> legal |
||
1102 | ; destroys eax |
||
1103 | push esi |
||
1104 | xor eax, eax |
||
1105 | @@: |
||
1106 | lodsb |
||
1107 | test al, al |
||
1108 | jz .done |
||
1109 | cmp al, 80h |
||
1110 | jae .big |
||
1111 | test [fat_legal_chars+eax], 1 |
||
1112 | jnz @b |
||
1113 | .err: |
||
1114 | pop esi |
||
1115 | clc |
||
1116 | ret |
||
1117 | .big: |
||
1118 | ; 0x80-0xAF, 0xE0-0xEF |
||
1119 | cmp al, 0xB0 |
||
1120 | jb @b |
||
1121 | cmp al, 0xE0 |
||
1122 | jb .err |
||
1123 | cmp al, 0xF0 |
||
1124 | jb @b |
||
1125 | jmp .err |
||
1126 | .done: |
||
1127 | sub esi, [esp] |
||
1128 | cmp esi, 257 |
||
1129 | pop esi |
||
1130 | ret |
||
1131 | |||
1132 | fat_next_short_name: |
||
1133 | ; in: edi->8+3 name |
||
1134 | ; out: name corrected |
||
1135 | ; CF=1 <=> error |
||
1136 | pushad |
||
1137 | mov ecx, 8 |
||
1138 | mov al, '~' |
||
1139 | std |
||
1140 | push edi |
||
1141 | add edi, 7 |
||
1142 | repnz scasb |
||
1143 | pop edi |
||
1144 | cld |
||
1145 | jz .tilde |
||
1146 | ; tilde is not found, insert "~1" at end |
||
1147 | add edi, 6 |
||
1148 | cmp word [edi], ' ' |
||
1149 | jnz .insert_tilde |
||
1150 | @@: dec edi |
||
1151 | cmp byte [edi], ' ' |
||
1152 | jz @b |
||
1153 | inc edi |
||
1154 | .insert_tilde: |
||
1155 | mov word [edi], '~1' |
||
1156 | popad |
||
1157 | ; clc ; CF already cleared |
||
1158 | ret |
||
1159 | .tilde: |
||
1160 | push edi |
||
1161 | add edi, 7 |
||
1162 | xor ecx, ecx |
||
1163 | @@: |
||
1164 | ; after tilde may be only digits and trailing spaces |
||
1165 | cmp byte [edi], '~' |
||
1166 | jz .break |
||
1167 | cmp byte [edi], ' ' |
||
1168 | jz .space |
||
1169 | cmp byte [edi], '9' |
||
1170 | jnz .found |
||
1171 | dec edi |
||
1172 | jmp @b |
||
1173 | .space: |
||
1174 | dec edi |
||
1175 | inc ecx |
||
1176 | jmp @b |
||
1177 | .found: |
||
1178 | inc byte [edi] |
||
1179 | .succ: |
||
1180 | pop edi |
||
1181 | popad |
||
1182 | clc |
||
1183 | ret |
||
1184 | .break: |
||
1185 | jecxz .noplace |
||
1186 | inc edi |
||
1187 | mov al, '1' |
||
1188 | @@: |
||
1189 | xchg al, [edi] |
||
1190 | inc edi |
||
1191 | cmp al, ' ' |
||
1192 | mov al, '0' |
||
1193 | jnz @b |
||
1194 | jmp .succ |
||
1195 | .noplace: |
||
1196 | dec edi |
||
1197 | cmp edi, [esp] |
||
1198 | jz .err |
||
1199 | add dword [esp], 8 |
||
1200 | mov word [edi], '~1' |
||
1201 | inc edi |
||
1202 | inc edi |
||
1203 | @@: |
||
1204 | mov byte [edi], '0' |
||
1205 | inc edi |
||
1206 | cmp edi, [esp] |
||
1207 | jb @b |
||
1208 | pop edi |
||
1209 | popad |
||
1210 | ;clc ; automatically |
||
1211 | ret |
||
1212 | .err: |
||
1213 | pop edi |
||
1214 | popad |
||
1215 | stc |
||
1216 | ret |
||
1217 | |||
1218 | fat_gen_short_name: |
||
1219 | ; in: esi->long name |
||
1220 | ; edi->buffer (8+3=11 chars) |
||
1221 | ; out: buffer filled |
||
1222 | pushad |
||
1223 | mov eax, ' ' |
||
1224 | push edi |
||
1225 | stosd |
||
1226 | stosd |
||
1227 | stosd |
||
1228 | pop edi |
||
1229 | xor eax, eax |
||
1230 | push 8 |
||
1231 | pop ebx |
||
1232 | lea ecx, [edi+8] |
||
1233 | .loop: |
||
1234 | lodsb |
||
1235 | test al, al |
||
1236 | jz .done |
||
1237 | call char_toupper |
||
1238 | cmp al, ' ' |
||
1239 | jz .space |
||
1240 | cmp al, 80h |
||
1241 | ja .big |
||
1242 | test [fat_legal_chars+eax], 2 |
||
1243 | jnz .symbol |
||
1244 | .inv_symbol: |
||
1245 | mov al, '_' |
||
1246 | or bh, 1 |
||
1247 | .symbol: |
||
1248 | cmp al, '.' |
||
1249 | jz .dot |
||
1250 | .normal_symbol: |
||
1251 | dec bl |
||
1252 | jns .store |
||
1253 | mov bl, 0 |
||
1254 | .space: |
||
1255 | or bh, 1 |
||
1256 | jmp .loop |
||
1257 | .store: |
||
1258 | stosb |
||
1259 | jmp .loop |
||
1260 | .big: |
||
1261 | cmp al, 0xB0 |
||
1262 | jb .normal_symbol |
||
1263 | cmp al, 0xE0 |
||
1264 | jb .inv_symbol |
||
1265 | cmp al, 0xF0 |
||
1266 | jb .normal_symbol |
||
1267 | jmp .inv_symbol |
||
1268 | .dot: |
||
1269 | test bh, 2 |
||
1270 | jz .firstdot |
||
1271 | pop ebx |
||
1272 | add ebx, edi |
||
1273 | sub ebx, ecx |
||
1274 | push ebx |
||
1275 | cmp edi, ecx |
||
1276 | jbe .skip |
||
1277 | @@: |
||
1278 | dec edi |
||
1279 | mov al, ' ' |
||
1280 | xchg al, [edi] |
||
1281 | dec ebx |
||
1282 | mov [ebx], al |
||
1283 | cmp edi, ecx |
||
1284 | ja @b |
||
1285 | .skip: |
||
1286 | mov bh, 3 |
||
1287 | jmp @f |
||
1288 | .firstdot: |
||
1289 | cmp bl, 8 |
||
1290 | jz .space |
||
1291 | push edi |
||
1292 | or bh, 2 |
||
1293 | @@: |
||
1294 | mov edi, ecx |
||
1295 | mov bl, 3 |
||
1296 | jmp .loop |
||
1297 | .done: |
||
1298 | test bh, 2 |
||
1299 | jz @f |
||
1300 | pop edi |
||
1301 | @@: |
||
1302 | lea edi, [ecx-8] |
||
1303 | test bh, 1 |
||
1304 | jz @f |
||
1305 | call fat_next_short_name |
||
1306 | @@: |
||
1307 | popad |
||
1308 | ret |
||
1309 | |||
1310 | ;---------------------------------------------------------------- |
||
1311 | ; |
||
1312 | ; fs_RamdiskRewrite - LFN variant for writing sys floppy |
||
1313 | ; |
||
1314 | ; esi points to filename |
||
1315 | ; ebx ignored (reserved) |
||
1316 | ; ecx number of bytes to write, 0+ |
||
1317 | ; edx mem location to data |
||
1318 | ; |
||
1319 | ; ret ebx = number of written bytes |
||
1320 | ; eax = 0 ok read or other = errormsg |
||
1321 | ; |
||
1322 | ;-------------------------------------------------------------- |
||
1323 | @@: |
||
1324 | mov eax, ERROR_ACCESS_DENIED |
||
1325 | xor ebx, ebx |
||
1326 | ret |
||
1327 | |||
1328 | fs_RamdiskRewrite: |
||
1329 | cmp byte [esi], 0 |
||
1330 | jz @b |
||
1331 | ; ramdisk doesn't support folders |
||
1332 | push esi |
||
1333 | @@: |
||
1334 | lodsb |
||
1335 | test al, al |
||
1336 | jz @f |
||
1337 | cmp al, '/' |
||
1338 | jnz @b |
||
1339 | pop esi |
||
1340 | .err5: |
||
1341 | mov eax, 5 ; file not found |
||
1342 | xor ebx, ebx |
||
1343 | ret |
||
1344 | @@: |
||
1345 | pop esi |
||
1346 | ; check existence |
||
1347 | push edi |
||
1348 | call rd_find_lfn |
||
1349 | jc .notfound |
||
1350 | ; found, delete FAT chain |
||
1351 | push edi |
||
1352 | xor eax, eax |
||
1353 | mov dword [edi+28], eax ; zero size |
||
1354 | xchg ax, word [edi+26] ; start cluster |
||
1355 | test eax, eax |
||
1356 | jz .done1 |
||
1357 | @@: |
||
1358 | cmp eax, 0xFF8 |
||
1359 | jae .done1 |
||
1360 | lea edi, [0x280000 + eax*2] ; position in FAT |
||
1361 | xor eax, eax |
||
1362 | xchg ax, [edi] |
||
1363 | jmp @b |
||
1364 | .done1: |
||
1365 | pop edi |
||
1366 | call get_time_for_file |
||
1367 | mov [edi+22], ax |
||
1368 | call get_date_for_file |
||
1369 | mov [edi+24], ax |
||
1370 | mov [edi+18], ax |
||
1371 | or byte [edi+11], 20h ; set 'archive' attribute |
||
1372 | jmp .doit |
||
1373 | .notfound: |
||
1374 | ; file is not found; generate short name |
||
1375 | call fat_name_is_legal |
||
1376 | jc @f |
||
1377 | pop edi |
||
1378 | jmp .err5 |
||
1379 | @@: |
||
1380 | sub esp, 12 |
||
1381 | mov edi, esp |
||
1382 | call fat_gen_short_name |
||
1383 | .test_short_name_loop: |
||
1384 | push esi ecx |
||
1385 | mov esi, 0x100000+512*19 |
||
1386 | .test_short_name_entry: |
||
1387 | cmp byte [esi+11], 0xF |
||
1388 | jz .test_short_name_cont |
||
1389 | mov ecx, 11 |
||
1390 | push esi edi |
||
1391 | repz cmpsb |
||
1392 | pop edi esi |
||
1393 | jz .short_name_found |
||
1394 | .test_short_name_cont: |
||
1395 | add esi, 20h |
||
1396 | cmp esi, 0x100000+512*33 |
||
1397 | jb .test_short_name_entry |
||
1398 | pop ecx esi |
||
1399 | jmp .found |
||
1400 | .short_name_found: |
||
1401 | call fat_next_short_name |
||
1402 | pop ecx esi |
||
1403 | jnc .test_short_name_loop |
||
1404 | .disk_full: |
||
1405 | add esp, 12 |
||
1406 | pop edi |
||
1407 | mov eax, ERROR_DISK_FULL |
||
1408 | xor ebx, ebx |
||
1409 | ret |
||
1410 | .found: |
||
1411 | ; now find space in directory |
||
1412 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
||
1413 | mov al, '~' |
||
1414 | push ecx edi |
||
1415 | mov ecx, 8 |
||
1416 | repnz scasb |
||
1417 | push 1 |
||
1418 | pop eax ; 1 entry |
||
1419 | jnz .notilde |
||
1420 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
||
1421 | xor eax, eax |
||
1422 | @@: |
||
1423 | cmp byte [esi], 0 |
||
1424 | jz @f |
||
1425 | inc esi |
||
1426 | inc eax |
||
1427 | jmp @b |
||
1428 | @@: |
||
1429 | sub esi, eax |
||
1430 | add eax, 12+13 |
||
1431 | mov ecx, 13 |
||
1432 | push edx |
||
1433 | cdq |
||
1434 | div ecx |
||
1435 | pop edx |
||
1436 | .notilde: |
||
1437 | ; find |
||
1438 | xor ecx, ecx |
||
1439 | mov edi, 0x100000+512*19 |
||
1440 | .scan_dir: |
||
1441 | cmp byte [edi], 0 |
||
1442 | jz .free |
||
1443 | cmp byte [edi], 0xE5 |
||
1444 | jz .free |
||
1445 | xor ecx, ecx |
||
1446 | .scan_cont: |
||
1447 | add edi, 0x20 |
||
1448 | cmp edi, 0x100000+512*33 |
||
1449 | jb .scan_dir |
||
1450 | pop edi ecx |
||
1451 | jmp .disk_full |
||
1452 | .free: |
||
1453 | inc ecx |
||
1454 | cmp ecx, eax |
||
1455 | jb .scan_cont |
||
1456 | ; found! |
||
1457 | ; calculate name checksum |
||
1458 | push esi ecx |
||
1459 | mov esi, [esp+8] |
||
1460 | mov ecx, 11 |
||
1461 | xor eax, eax |
||
1462 | @@: |
||
1463 | ror al, 1 |
||
1464 | add al, [esi] |
||
1465 | inc esi |
||
1466 | loop @b |
||
1467 | pop ecx esi |
||
1468 | ; edi points to last entry in free chunk |
||
1469 | dec ecx |
||
1470 | jz .nolfn |
||
1471 | push esi |
||
1472 | push edi |
||
1473 | .writelfn: |
||
1474 | sub edi, 20h |
||
1475 | push ecx eax |
||
1476 | mov eax, [esp+8] |
||
1477 | sub eax, edi |
||
1478 | shr eax, 5 |
||
1479 | cmp ecx, 1 |
||
1480 | jnz @f |
||
1481 | or al, 40h |
||
1482 | @@: |
||
1483 | stosb |
||
1484 | mov cl, 5 |
||
1485 | call .read_symbols |
||
1486 | mov ax, 0xF |
||
1487 | stosw |
||
1488 | pop eax |
||
1489 | stosb |
||
1490 | push eax |
||
1491 | mov cl, 6 |
||
1492 | call .read_symbols |
||
1493 | xor eax, eax |
||
1494 | stosw |
||
1495 | mov cl, 2 |
||
1496 | call .read_symbols |
||
1497 | pop eax ecx |
||
1498 | sub edi, 0x20 |
||
1499 | loop .writelfn |
||
1500 | pop edi |
||
1501 | pop esi |
||
1502 | .nolfn: |
||
1503 | xchg esi, [esp] |
||
1504 | mov ecx, 11 |
||
1505 | rep movsb |
||
1506 | mov word [edi], 20h ; attributes |
||
1507 | sub edi, 11 |
||
1508 | pop esi ecx |
||
1509 | add esp, 12 |
||
1510 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
||
1511 | call get_time_for_file |
||
1512 | mov [edi+14], ax ; creation time |
||
1513 | mov [edi+22], ax ; last write time |
||
1514 | call get_date_for_file |
||
1515 | mov [edi+16], ax ; creation date |
||
1516 | mov [edi+24], ax ; last write date |
||
1517 | mov [edi+18], ax ; last access date |
||
1518 | and word [edi+20], 0 ; high word of cluster |
||
1519 | and word [edi+26], 0 ; low word of cluster - to be filled |
||
1520 | and dword [edi+28], 0 ; file size - to be filled |
||
1521 | .doit: |
||
1522 | push ecx edx |
||
1523 | push ecx |
||
1524 | push edi |
||
1525 | add edi, 26 ; edi points to low word of cluster |
||
1526 | push edi |
||
1527 | jecxz .done |
||
1528 | mov ecx, 2849 |
||
1529 | mov edi, 0x280000 |
||
1530 | .write_loop: |
||
1531 | ; allocate new cluster |
||
1532 | xor eax, eax |
||
1533 | repnz scasw |
||
1534 | jnz .disk_full2 |
||
1535 | dec edi |
||
1536 | dec edi |
||
1537 | lea eax, [edi-0x280000] |
||
1538 | shr eax, 1 ; eax = cluster |
||
1539 | mov word [edi], 0xFFF ; mark as last cluster |
||
1540 | xchg edi, [esp] |
||
1541 | stosw |
||
1542 | pop edi |
||
1543 | push edi |
||
1544 | inc ecx |
||
1545 | ; write data |
||
1546 | shl eax, 9 |
||
1547 | add eax, 0x100000+31*512 |
||
1548 | mov ebx, edx |
||
1549 | xchg eax, ebx |
||
1550 | push ecx |
||
1551 | mov ecx, 512 |
||
1552 | cmp dword [esp+12], ecx |
||
1553 | jae @f |
||
1554 | mov ecx, [esp+12] |
||
1555 | @@: |
||
1556 | call memmove |
||
1557 | add edx, ecx |
||
1558 | sub [esp+12], ecx |
||
1559 | pop ecx |
||
1560 | jnz .write_loop |
||
1561 | .done: |
||
1562 | mov ebx, edx |
||
1563 | pop edi edi ecx edx ecx |
||
1564 | sub ebx, edx |
||
1565 | mov [edi+28], ebx |
||
1566 | pop edi |
||
1567 | xor eax, eax |
||
1568 | ret |
||
1569 | .disk_full2: |
||
1570 | mov ebx, edx |
||
1571 | pop edi edi ecx edx ecx |
||
1572 | sub ebx, edx |
||
1573 | mov [edi+28], ebx |
||
1574 | pop edi |
||
1575 | push ERROR_DISK_FULL |
||
1576 | pop eax |
||
1577 | ret |
||
1578 | |||
1579 | .read_symbol: |
||
1580 | or ax, -1 |
||
1581 | test esi, esi |
||
1582 | jz .retFFFF |
||
1583 | lodsb |
||
1584 | test al, al |
||
1585 | jnz ansi2uni_char |
||
1586 | xor eax, eax |
||
1587 | xor esi, esi |
||
1588 | .retFFFF: |
||
1589 | ret |
||
1590 | |||
1591 | .read_symbols: |
||
1592 | call .read_symbol |
||
1593 | stosw |
||
1594 | loop .read_symbols |
||
1595 | ret |
||
1596 | |||
78 | diamond | 1597 | ; \end{diamond}=>=>=>=>>->->-> |