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