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Rev | Author | Line No. | Line |
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1 | ha | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; RAMDISK functions ;; |
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4 | ;; (C) 2004 Ville Turjanmaa, License: GPL ;; |
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5 | ;; Addings by M.Lisovin ;; |
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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 |
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14 | |||
15 | mov esi,0x100000+512 |
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16 | mov edi,0x280000 |
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17 | |||
18 | fcnew: |
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19 | mov eax,dword [esi] |
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20 | mov ebx,dword [esi+4] |
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21 | mov ecx,dword [esi+8] |
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22 | mov edx,ecx |
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23 | shr edx,4 ;8 ok |
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24 | shr dx,4 ;7 ok |
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25 | xor ch,ch |
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26 | shld ecx,ebx,20 ;6 ok |
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27 | shr cx,4 ;5 ok |
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28 | shld ebx,eax,12 |
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29 | and ebx,0x0fffffff ;4 ok |
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30 | shr bx,4 ;3 ok |
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31 | shl eax,4 |
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32 | and eax,0x0fffffff ;2 ok |
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33 | shr ax,4 ;1 ok |
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78 | diamond | 34 | mov dword [edi],eax |
35 | mov dword [edi+4],ebx |
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36 | mov dword [edi+8],ecx |
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37 | mov dword [edi+12],edx |
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38 | add edi,16 |
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5 | halyavin | 39 | add esi,12 |
40 | |||
41 | cmp edi,0x280000+2856*2 ;2849 clusters |
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42 | jnz fcnew |
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43 | |||
44 | popad |
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45 | ret |
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46 | |||
47 | |||
48 | restorefatchain: ; restore fat chain |
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49 | |||
50 | pushad |
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51 | |||
52 | mov esi,0x280000 |
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53 | mov edi,0x100000+512 |
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54 | |||
55 | fcnew2: |
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56 | mov eax,dword [esi] |
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57 | mov ebx,dword [esi+4] |
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58 | shl ax,4 |
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59 | shl eax,4 |
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60 | shl bx,4 |
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61 | shr ebx,4 |
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62 | shrd eax,ebx,8 |
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63 | shr ebx,8 |
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78 | diamond | 64 | mov dword [edi],eax |
65 | mov word [edi+4],bx |
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66 | add edi,6 |
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5 | halyavin | 67 | add esi,8 |
68 | |||
69 | cmp edi,0x100000+512+4278 ;4274 bytes - all used FAT |
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70 | jb fcnew2 |
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71 | |||
72 | mov esi,0x100000+512 ; duplicate fat chain |
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73 | mov edi,0x100000+512+0x1200 |
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74 | mov ecx,1069 ;4274/4 |
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75 | cld |
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76 | rep movsd |
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77 | |||
78 | popad |
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79 | ret |
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80 | |||
81 | |||
1 | ha | 82 | ramdisk_free_space: |
83 | ;--------------------------------------------- |
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84 | ; |
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85 | ; returns free space in edi |
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86 | ; rewr.by Mihasik |
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87 | ;--------------------------------------------- |
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88 | |||
89 | push eax ebx ecx |
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90 | |||
91 | mov edi,0x280000 ;start of FAT |
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92 | xor ax,ax ;Free cluster=0x0000 in FAT |
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93 | xor ebx,ebx ;counter |
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5 | halyavin | 94 | mov ecx,2849 ;2849 clusters |
1 | ha | 95 | cld |
96 | rdfs1: |
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97 | repne scasw |
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98 | jnz rdfs2 ;if last cluster not 0 |
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99 | inc ebx |
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78 | diamond | 100 | test ecx, ecx |
101 | jnz rdfs1 |
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1 | ha | 102 | rdfs2: |
103 | shl ebx,9 ;free clusters*512 |
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104 | mov edi,ebx |
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105 | |||
106 | pop ecx ebx eax |
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107 | ret |
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108 | |||
109 | |||
110 | expand_filename: |
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111 | ;--------------------------------------------- |
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112 | ; |
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113 | ; exapand filename with '.' to 11 character |
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114 | ; eax - pointer to filename |
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115 | ;--------------------------------------------- |
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116 | |||
117 | push esi edi ebx |
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118 | |||
119 | mov edi,esp ; check for '.' in the name |
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120 | add edi,12+8 |
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121 | |||
122 | mov esi,eax |
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123 | |||
124 | mov eax,edi |
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125 | mov [eax+0],dword ' ' |
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126 | mov [eax+4],dword ' ' |
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127 | mov [eax+8],dword ' ' |
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128 | |||
129 | flr1: |
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130 | |||
131 | cmp [esi],byte '.' |
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132 | jne flr2 |
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133 | mov edi,eax |
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134 | add edi,7 |
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135 | jmp flr3 |
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136 | |||
137 | flr2: |
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138 | |||
139 | mov bl,[esi] |
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140 | mov [edi],bl |
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141 | |||
142 | flr3: |
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143 | |||
144 | inc esi |
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145 | inc edi |
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146 | |||
147 | mov ebx,eax |
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148 | add ebx,11 |
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149 | |||
150 | cmp edi,ebx |
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151 | jbe flr1 |
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152 | |||
153 | pop ebx edi esi |
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154 | ret |
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155 | |||
156 | fileread: |
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157 | ;---------------------------------------------------------------- |
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158 | ; |
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159 | ; fileread - sys floppy |
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160 | ; |
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161 | ; eax points to filename 11 chars |
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162 | ; ebx first wanted block ; 1+ ; if 0 then set to 1 |
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163 | ; ecx number of blocks to read ; 1+ ; if 0 then set to 1 |
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164 | ; edx mem location to return data |
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165 | ; esi length of filename 12*X 0=root |
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166 | ; |
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167 | ; ret ebx = size or 0xffffffff file not found |
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168 | ; eax = 0 ok read or other = errormsg |
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169 | ; |
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170 | ;-------------------------------------------------------------- |
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171 | test ebx,ebx ;if ebx=0 - set to 1 |
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172 | jnz frfl5 |
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173 | inc ebx |
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174 | frfl5: |
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175 | test ecx,ecx ;if ecx=0 - set to 1 |
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176 | jnz frfl6 |
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177 | inc ecx |
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178 | frfl6: |
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179 | test esi,esi ; return ramdisk root |
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180 | jnz fr_noroot ;if not root |
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181 | cmp ebx,14 ;14 clusters=root dir |
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182 | ja oorr |
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183 | cmp ecx,14 |
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184 | ja oorr |
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185 | jmp fr_do |
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186 | oorr: |
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187 | mov eax,5 ;out of root range (fnf) |
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188 | xor ebx,ebx |
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189 | dec ebx ;0xffffffff |
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190 | ret |
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191 | |||
192 | fr_do: ;reading rootdir |
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193 | mov edi,edx |
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194 | dec ebx |
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195 | push edx |
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196 | mov edx,ecx |
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197 | add edx,ebx |
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5 | halyavin | 198 | cmp edx,15 ;ebx+ecx=14+1 |
1 | ha | 199 | pushf |
200 | jbe fr_do1 |
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201 | sub edx,14 |
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202 | sub ecx,edx |
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203 | fr_do1: |
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204 | shl ebx,9 |
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205 | mov esi,0x100000+512*19 |
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206 | add esi,ebx |
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207 | shl ecx,7 |
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208 | cld |
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209 | rep movsd |
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210 | popf |
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211 | pop edx |
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5 | halyavin | 212 | jae fr_do2 |
1 | ha | 213 | xor eax,eax ; ok read |
214 | xor ebx,ebx |
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215 | ret |
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216 | fr_do2: ;if last cluster |
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217 | mov eax,6 ;end of file |
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218 | xor ebx,ebx |
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219 | ret |
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220 | |||
221 | fr_noroot: |
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222 | |||
223 | sub esp,32 |
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224 | call expand_filename |
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225 | |||
226 | dec ebx |
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227 | |||
228 | push eax |
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229 | |||
230 | push eax ebx ecx edx esi edi |
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231 | call rd_findfile |
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232 | je fifound |
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233 | add esp,32+28 ;if file not found |
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234 | ret |
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235 | |||
236 | fifound: |
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237 | |||
238 | mov ebx,[edi-11+28] ;file size |
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239 | mov [esp+20],ebx |
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240 | mov [esp+24],ebx |
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241 | add edi,0xf |
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242 | movzx eax,word [edi] |
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243 | mov edi,eax ;edi=cluster |
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244 | |||
245 | frnew: |
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246 | |||
247 | add eax,31 ;bootsector+2*fat+filenames |
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248 | shl eax,9 ;*512 |
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249 | add eax,0x100000 ;image base |
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250 | mov ebx,[esp+8] |
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251 | mov ecx,512 ;[esp+4] |
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252 | |||
253 | cmp [esp+16],dword 0 ; wanted cluster ? |
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254 | jne frfl7 |
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255 | call memmove |
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256 | add [esp+8],dword 512 |
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257 | dec dword [esp+12] ; last wanted cluster ? |
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258 | je frnoread |
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259 | jmp frfl8 |
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260 | frfl7: |
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261 | dec dword [esp+16] |
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262 | frfl8: |
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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 |
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266 | jz frnoread2 |
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267 | |||
268 | cmp [esp+24],dword 512 ;eof - size |
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269 | jb frnoread |
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270 | sub [esp+24],dword 512 |
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271 | |||
272 | jmp frnew |
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273 | |||
274 | frnoread2: |
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275 | |||
276 | cmp [esp+16],dword 0 ; eof without read ? |
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277 | je frnoread |
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278 | |||
279 | pop edi esi edx ecx |
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280 | add esp,4 |
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281 | pop ebx ; ebx <- eax : size of file |
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282 | add esp,36 |
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283 | mov eax,6 ; end of file |
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284 | ret |
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285 | |||
286 | frnoread: |
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287 | |||
288 | pop edi esi edx ecx |
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289 | add esp,4 |
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290 | pop ebx ; ebx <- eax : size of file |
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291 | add esp,36 |
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292 | xor eax,eax ;read ok |
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293 | ret |
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294 | |||
295 | filedelete: |
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296 | ;-------------------------------------------- |
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297 | ; |
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298 | ; filedelete - sys floppy |
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299 | ; in: |
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300 | ; eax - pointer to filename 11 chars |
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301 | ; |
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302 | ; out: |
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303 | ; eax - 0 = successful, 5 = file not found |
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304 | ; |
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305 | ;-------------------------------------------- |
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306 | |||
307 | sub esp,32 |
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308 | call expand_filename |
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309 | |||
310 | push eax ebx ecx edx esi edi |
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311 | |||
312 | call rd_findfile |
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313 | je fifoundd |
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314 | pop edi esi edx ecx ebx eax ;file not found |
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315 | add esp,32 |
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316 | mov eax,5 |
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317 | ret |
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318 | |||
319 | fifoundd: |
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320 | |||
321 | mov [edi-11],byte 0xE5 ;mark filename deleted |
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322 | add edi,0xf |
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323 | movzx eax,word [edi] |
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324 | mov edi,eax ;edi = cluster |
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325 | |||
326 | frnewd: |
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327 | |||
328 | shl edi,1 ;find next cluster from FAT |
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329 | add edi,0x280000 |
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330 | movzx eax,word [edi] |
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331 | mov [edi],word 0x0 ;clear fat chain cluster |
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332 | mov edi,eax |
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333 | cmp edi,dword 0xff8 ;last cluster ? |
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334 | jb frnewd |
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335 | |||
336 | pop edi esi edx ecx ebx eax |
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337 | add esp,32 |
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338 | xor eax,eax ; file found |
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339 | ret |
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340 | |||
341 | |||
342 | |||
343 | filesave: |
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344 | ;---------------------------------------------------------- |
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345 | ; |
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346 | ; filesave - sys floppy |
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347 | ; |
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348 | ; eax points to filename 11 chars |
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349 | ; |
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350 | ; eax ; pointer to file name |
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351 | ; ebx ; buffer |
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352 | ; ecx ; count to write in bytes |
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353 | ; edx ; 0 create new , 1 append |
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354 | ; |
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355 | ;----------------------------------------------------------- |
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356 | |||
357 | sub esp,32 |
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358 | call expand_filename |
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359 | test edx,edx |
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360 | jnz fsdel |
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361 | pusha |
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362 | call filedelete |
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363 | popa |
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364 | |||
365 | fsdel: |
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366 | |||
367 | call ramdisk_free_space |
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368 | cmp ecx,edi |
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369 | jbe rd_do_save |
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370 | add esp,32 |
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371 | mov eax,8 ;disk full |
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372 | ret |
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373 | |||
374 | rd_do_save: |
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375 | |||
376 | push eax ebx ecx edx esi edi |
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377 | |||
378 | mov edi,0x100000+512*18+512 ;Point at directory |
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379 | mov edx,224 +1 |
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380 | ; find an empty spot for filename in the root dir |
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381 | l20ds: |
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382 | dec edx |
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383 | jz frnoreadds |
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384 | l21ds: |
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385 | cmp [edi],byte 0xE5 |
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386 | jz fifoundds |
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387 | cmp [edi],byte 0x0 |
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388 | jz fifoundds |
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389 | add edi,32 ; Advance to next entry |
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390 | jmp l20ds |
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391 | fifoundds: |
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392 | |||
393 | push edi ; move the filename to root dir |
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394 | mov esi,[esp+4+20] |
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395 | mov ecx,11 |
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396 | cld |
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397 | rep movsb |
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398 | pop edi |
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399 | mov edx,edi |
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400 | add edx,11+0xf ; edx <- cluster save position |
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401 | mov ebx,[esp+12] ; save file size |
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402 | mov [edi+28],ebx |
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403 | mov [edi+11],byte 0x20 ; attribute |
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404 | ; Ivan Poddubny 11/12/2003: |
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405 | call get_date_for_file ; from FAT32.INC |
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406 | mov [edi+24],ax ; date |
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407 | call get_time_for_file ; from FAT32.INC |
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408 | mov [edi+22],ax ; time |
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409 | ; End |
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410 | mov edi,0x280000 ;pointer to first cluster |
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411 | mov ecx,2849 |
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412 | cld |
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413 | frnewds: |
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414 | xor ax,ax |
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415 | repne scasw |
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416 | mov ebx,2848 |
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417 | sub ebx,ecx |
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418 | mov [edx],bx ; save next cluster pos. to prev cl. |
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419 | mov edx,edi ; next save pos abs mem add |
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420 | dec edx |
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421 | dec edx |
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422 | call fdc_filesave |
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423 | pusha ; move save to floppy cluster |
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424 | add ebx,31 |
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425 | shl ebx,9 |
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426 | add ebx,0x100000 |
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427 | mov eax,[esp+32+16] |
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428 | mov ecx,512 |
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429 | call memmove |
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430 | popa |
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431 | |||
432 | mov eax,[esp+12] |
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433 | cmp eax,512 |
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48 | halyavin | 434 | jbe flnsa |
1 | ha | 435 | sub eax,512 |
436 | mov [esp+12],eax |
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78 | diamond | 437 | add dword [esp+16], 512 |
1 | ha | 438 | jmp frnewds |
439 | |||
440 | flnsa: |
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78 | diamond | 441 | mov [edi-2],word 4095 ; mark end of file - last cluster |
1 | ha | 442 | |
443 | frnoreadds: |
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444 | |||
445 | pop edi esi edx ecx ebx eax |
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446 | add esp,32 |
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447 | |||
19 | mario79 | 448 | ; pusha |
449 | ; cli |
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450 | ; call fdc_commitfile |
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451 | ; sti |
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452 | ; popa |
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1 | ha | 453 | |
454 | xor eax,eax ;ok write |
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455 | ret |
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456 | |||
457 | rd_findfile: |
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458 | ;by Mihasik |
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459 | ;IN: eax - pointer to filename OUT: filestring+11 in edi or notZero in flags and fnf in eax,ebx |
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460 | |||
461 | mov edi,0x100000+512*18+512 ;Point at directory |
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462 | cld |
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463 | rd_newsearch: |
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464 | mov esi,eax |
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465 | mov ecx,11 |
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466 | rep cmpsb |
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467 | je rd_ff |
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468 | add cl,21 |
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469 | add edi,ecx |
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470 | cmp edi,0x100000+512*33 |
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471 | jb rd_newsearch |
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472 | mov eax,5 ;if file not found - eax=5 |
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473 | xor ebx,ebx |
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474 | dec ebx ;ebx=0xffffffff and zf=0 |
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475 | rd_ff: |
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476 | ret |
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477 | |||
478 | rd_getfileinfo: |
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479 | ;get date, time, size or attributes of file |
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480 | ;IN: eax - pointer to file, ebx - type of function: 12-get filesize, 13-get fileattr, 14-get filedate |
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481 | ;ecx - filelengh 0=root |
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482 | ;OUT: eax=0 - Ok or 5 - file not found ebx - date/time, size or attributes |
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483 | test ecx,ecx |
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484 | jnz no_getfinfo_root |
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485 | mov eax,5 ;if root - fnf |
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486 | xor ebx,ebx |
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487 | dec ebx |
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488 | ret |
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489 | no_getfinfo_root: ;if not root |
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490 | sub esp,32 |
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491 | call expand_filename |
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492 | call rd_findfile |
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493 | je fifoundi |
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494 | add esp,32 ;if file not found |
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495 | ret |
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496 | fifoundi: |
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497 | cmp ebx,13 |
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498 | jne no_rd_attr |
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499 | movzx ebx,byte [edi] ;get attributes |
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500 | jmp rd_getfileinfo_end |
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501 | no_rd_attr: |
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502 | cmp ebx,14 |
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503 | jne no_rd_date |
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504 | mov ebx,dword [edi+11] ;get date/time |
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505 | jmp rd_getfileinfo_end |
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506 | no_rd_date: |
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507 | mov ebx,dword [edi+17] ;get size |
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508 | rd_getfileinfo_end: |
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509 | xor eax,eax |
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510 | add esp,32 |
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71 | diamond | 511 | ret |
512 | |||
513 | ; \begin{diamond} |
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514 | |||
515 | uni2ansi_str: |
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516 | ; convert UNICODE zero-terminated string to ASCII-string (codepage 866) |
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517 | ; in: esi->source, edi->buffer (may be esi=edi) |
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518 | ; destroys: eax,esi,edi |
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83 | diamond | 519 | lodsw |
520 | test ax, ax |
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521 | jz .done |
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522 | cmp ax, 0x80 |
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523 | jb .ascii |
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524 | cmp ax, 0x401 |
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525 | jz .yo1 |
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526 | cmp ax, 0x451 |
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527 | jz .yo2 |
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528 | cmp ax, 0x410 |
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529 | jb .unk |
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530 | cmp ax, 0x440 |
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531 | jb .rus1 |
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532 | cmp ax, 0x450 |
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533 | jb .rus2 |
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71 | diamond | 534 | .unk: |
83 | diamond | 535 | mov al, '_' |
536 | jmp .doit |
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71 | diamond | 537 | .yo1: |
83 | diamond | 538 | mov al, 'ð' |
539 | jmp .doit |
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71 | diamond | 540 | .yo2: |
83 | diamond | 541 | mov al, 'ñ' |
542 | jmp .doit |
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71 | diamond | 543 | .rus1: |
544 | ; 0x410-0x43F -> 0x80-0xAF |
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83 | diamond | 545 | add al, 0x70 |
546 | jmp .doit |
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71 | diamond | 547 | .rus2: |
75 | diamond | 548 | ; 0x440-0x44F -> 0xE0-0xEF |
83 | diamond | 549 | add al, 0xA0 |
71 | diamond | 550 | .ascii: |
551 | .doit: |
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83 | diamond | 552 | stosb |
553 | jmp uni2ansi_str |
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71 | diamond | 554 | .done: |
83 | diamond | 555 | mov byte [edi], 0 |
556 | ret |
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71 | diamond | 557 | |
75 | diamond | 558 | ansi2uni_char: |
559 | ; convert ANSI character in al to UNICODE character in ax, using cp866 encoding |
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560 | mov ah, 0 |
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561 | ; 0x00-0x7F - trivial map |
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562 | cmp al, 0x80 |
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563 | jb .ret |
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564 | ; 0x80-0xAF -> 0x410-0x43F |
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565 | cmp al, 0xB0 |
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566 | jae @f |
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567 | add ax, 0x410-0x80 |
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568 | .ret: |
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569 | ret |
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570 | @@: |
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571 | ; 0xE0-0xEF -> 0x440-0x44F |
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572 | cmp al, 0xE0 |
||
573 | jb .unk |
||
574 | cmp al, 0xF0 |
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575 | jae @f |
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576 | add ax, 0x440-0xE0 |
||
577 | ret |
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578 | ; 0xF0 -> 0x401 |
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579 | ; 0xF1 -> 0x451 |
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580 | @@: |
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581 | cmp al, 'ð' |
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582 | jz .yo1 |
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583 | cmp al, 'ñ' |
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584 | jz .yo2 |
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585 | .unk: |
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586 | mov al, '_' ; ah=0 |
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587 | ret |
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588 | .yo1: |
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589 | mov ax, 0x401 |
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590 | ret |
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591 | .yo2: |
||
592 | mov ax, 0x451 |
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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 | |
86 | diamond | 837 | bdfe_to_fat_time: |
838 | push edx |
||
839 | mov edx, eax |
||
840 | shr eax, 16 |
||
841 | and dh, 0x3F |
||
842 | shl eax, 6 |
||
843 | or al, dh |
||
844 | shr dl, 1 |
||
845 | and dl, 0x1F |
||
846 | shl eax, 5 |
||
847 | or al, dl |
||
848 | pop edx |
||
849 | ret |
||
850 | |||
851 | bdfe_to_fat_date: |
||
852 | push edx |
||
853 | mov edx, eax |
||
854 | shr eax, 16 |
||
855 | sub ax, 1980 |
||
856 | and dh, 0xF |
||
857 | shl eax, 4 |
||
858 | or al, dh |
||
859 | and dl, 0x1F |
||
860 | shl eax, 5 |
||
861 | or al, dl |
||
862 | pop edx |
||
863 | ret |
||
864 | |||
75 | diamond | 865 | fat_entry_to_bdfe: |
866 | ; convert FAT entry at edi to BDFE (block of data of folder entry) at esi, advance esi |
||
867 | ; destroys eax |
||
86 | diamond | 868 | mov eax, [ebp-4] |
869 | mov [esi+4], eax ; ASCII/UNICODE name |
||
870 | fat_entry_to_bdfe2: |
||
75 | diamond | 871 | movzx eax, byte [edi+11] |
872 | mov [esi], eax ; attributes |
||
873 | movzx eax, word [edi+14] |
||
874 | call fat_time_to_bdfe |
||
875 | mov [esi+8], eax ; creation time |
||
876 | movzx eax, word [edi+16] |
||
877 | call fat_date_to_bdfe |
||
878 | mov [esi+12], eax ; creation date |
||
879 | and dword [esi+16], 0 ; last access time is not supported on FAT |
||
880 | movzx eax, word [edi+18] |
||
881 | call fat_date_to_bdfe |
||
882 | mov [esi+20], eax ; last access date |
||
883 | movzx eax, word [edi+22] |
||
884 | call fat_time_to_bdfe |
||
885 | mov [esi+24], eax ; last write time |
||
886 | movzx eax, word [edi+24] |
||
887 | call fat_date_to_bdfe |
||
888 | mov [esi+28], eax ; last write date |
||
889 | mov eax, [edi+28] |
||
890 | mov [esi+32], eax ; file size (low dword) |
||
891 | xor eax, eax |
||
892 | mov [esi+36], eax ; file size (high dword) |
||
86 | diamond | 893 | test ebp, ebp |
894 | jz .ret |
||
75 | diamond | 895 | push ecx edi |
896 | lea edi, [esi+40] |
||
897 | mov esi, ebp |
||
78 | diamond | 898 | test byte [esi-4], 1 |
899 | jz .ansi |
||
900 | mov ecx, 260/2 |
||
75 | diamond | 901 | rep movsd |
78 | diamond | 902 | mov [edi-2], ax |
903 | @@: |
||
75 | diamond | 904 | mov esi, edi |
905 | pop edi ecx |
||
86 | diamond | 906 | .ret: |
75 | diamond | 907 | ret |
78 | diamond | 908 | .ansi: |
909 | mov ecx, 264/4 |
||
910 | rep movsd |
||
911 | mov [edi-1], al |
||
912 | jmp @b |
||
75 | diamond | 913 | |
86 | diamond | 914 | bdfe_to_fat_entry: |
915 | ; convert BDFE at edx to FAT entry at edi |
||
916 | ; destroys eax |
||
917 | ; attributes byte |
||
918 | test byte [edi+11], 8 ; volume label? |
||
919 | jnz @f |
||
920 | mov al, [edx] |
||
921 | and al, 0x27 |
||
922 | and byte [edi+11], 0x10 |
||
923 | or byte [edi+11], al |
||
924 | @@: |
||
925 | mov eax, [edx+8] |
||
926 | call bdfe_to_fat_time |
||
927 | mov [edi+14], ax ; creation time |
||
928 | mov eax, [edx+12] |
||
929 | call bdfe_to_fat_date |
||
930 | mov [edi+16], ax ; creation date |
||
931 | mov eax, [edx+20] |
||
932 | call bdfe_to_fat_date |
||
933 | mov [edi+18], ax ; last access date |
||
934 | mov eax, [edx+24] |
||
935 | call bdfe_to_fat_time |
||
936 | mov [edi+22], ax ; last write time |
||
937 | mov eax, [edx+28] |
||
938 | call bdfe_to_fat_date |
||
939 | mov [edi+24], ax ; last write date |
||
940 | ret |
||
941 | |||
942 | ramdisk_root_first: |
||
943 | mov edi, 0x100000+512*19 |
||
944 | clc |
||
945 | ret |
||
946 | ramdisk_root_next: |
||
947 | add edi, 0x20 |
||
948 | cmp edi, 0x100000+512*33 |
||
949 | cmc |
||
950 | ret |
||
951 | |||
71 | diamond | 952 | rd_find_lfn: |
953 | ; in: esi->name |
||
954 | ; out: CF=1 - file not found |
||
955 | ; else CF=0 and edi->direntry |
||
86 | diamond | 956 | push esi edi |
957 | push ramdisk_root_first |
||
958 | push ramdisk_root_next |
||
959 | call fat_find_lfn |
||
960 | jc .notfound |
||
961 | cmp byte [esi], 0 |
||
962 | jnz .notfound |
||
963 | add esp, 12 |
||
964 | pop esi |
||
965 | ret ; CF=0 |
||
71 | diamond | 966 | .notfound: |
86 | diamond | 967 | add esp, 8 |
968 | pop edi esi |
||
78 | diamond | 969 | stc |
970 | ret |
||
71 | diamond | 971 | |
972 | ;---------------------------------------------------------------- |
||
973 | ; |
||
974 | ; fs_RamdiskRead - LFN variant for reading sys floppy |
||
975 | ; |
||
976 | ; esi points to filename |
||
977 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
978 | ; may be ebx=0 - start from first byte |
||
979 | ; ecx number of bytes to read, 0+ |
||
980 | ; edx mem location to return data |
||
981 | ; |
||
77 | diamond | 982 | ; ret ebx = bytes read or 0xffffffff file not found |
71 | diamond | 983 | ; eax = 0 ok read or other = errormsg |
984 | ; |
||
985 | ;-------------------------------------------------------------- |
||
986 | fs_RamdiskRead: |
||
75 | diamond | 987 | cmp byte [esi], 0 |
988 | jnz @f |
||
989 | or ebx, -1 |
||
990 | mov eax, 10 ; access denied |
||
991 | ret |
||
71 | diamond | 992 | @@: |
75 | diamond | 993 | push edi |
994 | call rd_find_lfn |
||
995 | jnc .found |
||
996 | pop edi |
||
997 | or ebx, -1 |
||
998 | mov eax, 5 ; file not found |
||
999 | ret |
||
71 | diamond | 1000 | .found: |
75 | diamond | 1001 | test ebx, ebx |
1002 | jz .l1 |
||
1003 | cmp dword [ebx+4], 0 |
||
1004 | jz @f |
||
77 | diamond | 1005 | xor ebx, ebx |
71 | diamond | 1006 | .reteof: |
75 | diamond | 1007 | mov eax, 6 ; EOF |
1008 | pop edi |
||
1009 | ret |
||
71 | diamond | 1010 | @@: |
75 | diamond | 1011 | mov ebx, [ebx] |
71 | diamond | 1012 | .l1: |
77 | diamond | 1013 | push ecx edx |
1014 | push 0 |
||
1015 | mov eax, [edi+28] |
||
1016 | sub eax, ebx |
||
1017 | jb .eof |
||
1018 | cmp eax, ecx |
||
1019 | jae @f |
||
1020 | mov ecx, eax |
||
1021 | mov byte [esp], 6 ; EOF |
||
1022 | @@: |
||
75 | diamond | 1023 | movzx edi, word [edi+26] ; cluster |
71 | diamond | 1024 | .new: |
75 | diamond | 1025 | jecxz .done |
1026 | test edi, edi |
||
1027 | jz .eof |
||
1028 | cmp edi, 0xFF8 |
||
1029 | jae .eof |
||
1030 | lea eax, [edi+31] ; bootsector+2*fat+filenames |
||
1031 | shl eax, 9 ; *512 |
||
1032 | add eax, 0x100000 ; image base |
||
71 | diamond | 1033 | ; now eax points to data of cluster |
75 | diamond | 1034 | sub ebx, 512 |
1035 | jae .skip |
||
1036 | lea eax, [eax+ebx+512] |
||
1037 | neg ebx |
||
1038 | push ecx |
||
1039 | cmp ecx, ebx |
||
1040 | jbe @f |
||
1041 | mov ecx, ebx |
||
71 | diamond | 1042 | @@: |
75 | diamond | 1043 | mov ebx, edx |
1044 | call memmove |
||
1045 | add edx, ecx |
||
1046 | sub [esp], ecx |
||
1047 | pop ecx |
||
1048 | xor ebx, ebx |
||
71 | diamond | 1049 | .skip: |
75 | diamond | 1050 | movzx edi, word [edi*2+0x280000] ; find next cluster from FAT |
1051 | jmp .new |
||
71 | diamond | 1052 | .eof: |
77 | diamond | 1053 | mov ebx, edx |
1054 | pop eax edx ecx |
||
1055 | sub ebx, edx |
||
75 | diamond | 1056 | jmp .reteof |
71 | diamond | 1057 | .done: |
77 | diamond | 1058 | mov ebx, edx |
1059 | pop eax edx ecx edi |
||
1060 | sub ebx, edx |
||
75 | diamond | 1061 | ret |
71 | diamond | 1062 | |
75 | diamond | 1063 | ;---------------------------------------------------------------- |
1064 | ; |
||
1065 | ; fs_RamdiskReadFolder - LFN variant for reading sys floppy folder |
||
1066 | ; |
||
1067 | ; esi points to filename; only root is folder on ramdisk |
||
78 | diamond | 1068 | ; ebx pointer to structure 32-bit number = first wanted block |
1069 | ; & flags (bitfields) |
||
1070 | ; flags: bit 0: 0=ANSI names, 1=UNICODE names |
||
75 | diamond | 1071 | ; ecx number of blocks to read, 0+ |
1072 | ; edx mem location to return data |
||
1073 | ; |
||
1074 | ; ret ebx = size or 0xffffffff file not found |
||
1075 | ; eax = 0 ok read or other = errormsg |
||
1076 | ; |
||
1077 | ;-------------------------------------------------------------- |
||
1078 | fs_RamdiskReadFolder: |
||
1079 | cmp byte [esi], 0 |
||
1080 | jz @f |
||
1081 | ; ramdisk doesn't support folders |
||
1082 | mov eax, ERROR_ACCESS_DENIED |
||
1083 | or ebx, -1 |
||
1084 | ret |
||
1085 | @@: |
||
1086 | push esi edi ecx |
||
1087 | ; init header |
||
1088 | push ecx |
||
1089 | mov edi, edx |
||
1090 | mov ecx, 32/4 |
||
1091 | xor eax, eax |
||
1092 | rep stosd |
||
1093 | mov byte [edx], 1 ; version |
||
1094 | pop ecx |
||
1095 | push ebp |
||
1096 | sub esp, 262*2 ; allocate space for LFN |
||
1097 | mov ebp, esp |
||
78 | diamond | 1098 | push dword [ebx+4] ; for fat_get_name: read ANSI/UNICODE name |
1099 | mov ebx, [ebx] |
||
75 | diamond | 1100 | ; read root |
1101 | mov esi, edi ; esi points to block of data of folder entry (BDFE) |
||
1102 | mov edi, 0x100000+512*19 |
||
1103 | .l1: |
||
1104 | call fat_get_name |
||
1105 | jc .l2 |
||
1106 | cmp byte [edi+11], 0xF |
||
1107 | jnz @f |
||
1108 | add edi, 0x20 |
||
1109 | @@: |
||
1110 | inc dword [edx+8] ; new file found |
||
1111 | dec ebx |
||
1112 | jns .l2 |
||
1113 | dec ecx |
||
1114 | js .l2 |
||
1115 | inc dword [edx+4] ; new file block copied |
||
1116 | call fat_entry_to_bdfe |
||
1117 | .l2: |
||
1118 | add edi, 0x20 |
||
1119 | cmp edi, 0x100000+512*33 |
||
1120 | jb .l1 |
||
1121 | add esp, 262*2+4 |
||
1122 | pop ebp |
||
77 | diamond | 1123 | mov ebx, [edx+4] |
75 | diamond | 1124 | xor eax, eax |
1125 | dec ecx |
||
1126 | js @f |
||
1127 | mov al, ERROR_END_OF_FILE |
||
1128 | @@: |
||
1129 | pop ecx edi esi |
||
1130 | ret |
||
1131 | |||
83 | diamond | 1132 | iglobal |
1133 | label fat_legal_chars byte |
||
1134 | ; 0 = not allowed |
||
1135 | ; 1 = allowed only in long names |
||
1136 | ; 3 = allowed |
||
1137 | times 32 db 0 |
||
1138 | ; ! " # $ % & ' ( ) * + , - . / |
||
1139 | db 1,3,0,3,3,3,3,3,3,3,0,1,1,3,3,0 |
||
1140 | ; 0 1 2 3 4 5 6 7 8 9 : ; < = > ? |
||
1141 | db 3,3,3,3,3,3,3,3,3,3,0,1,0,1,0,0 |
||
1142 | ; @ A B C D E F G H I J K L M N O |
||
1143 | db 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 |
||
1144 | ; P Q R S T U V W X Y Z [ \ ] ^ _ |
||
1145 | db 3,3,3,3,3,3,3,3,3,3,3,1,0,1,3,3 |
||
1146 | ; ` a b c d e f g h i j k l m n o |
||
1147 | db 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 |
||
1148 | ; p q r s t u v w x y z { | } ~ |
||
1149 | db 3,3,3,3,3,3,3,3,3,3,3,3,0,3,3,0 |
||
1150 | endg |
||
1151 | |||
1152 | fat_name_is_legal: |
||
1153 | ; in: esi->(long) name |
||
1154 | ; out: CF set <=> legal |
||
1155 | ; destroys eax |
||
1156 | push esi |
||
1157 | xor eax, eax |
||
1158 | @@: |
||
1159 | lodsb |
||
1160 | test al, al |
||
1161 | jz .done |
||
1162 | cmp al, 80h |
||
1163 | jae .big |
||
1164 | test [fat_legal_chars+eax], 1 |
||
1165 | jnz @b |
||
1166 | .err: |
||
1167 | pop esi |
||
1168 | clc |
||
1169 | ret |
||
1170 | .big: |
||
1171 | ; 0x80-0xAF, 0xE0-0xEF |
||
1172 | cmp al, 0xB0 |
||
1173 | jb @b |
||
1174 | cmp al, 0xE0 |
||
1175 | jb .err |
||
1176 | cmp al, 0xF0 |
||
1177 | jb @b |
||
1178 | jmp .err |
||
1179 | .done: |
||
1180 | sub esi, [esp] |
||
1181 | cmp esi, 257 |
||
1182 | pop esi |
||
1183 | ret |
||
1184 | |||
1185 | fat_next_short_name: |
||
1186 | ; in: edi->8+3 name |
||
1187 | ; out: name corrected |
||
1188 | ; CF=1 <=> error |
||
1189 | pushad |
||
1190 | mov ecx, 8 |
||
1191 | mov al, '~' |
||
1192 | std |
||
1193 | push edi |
||
1194 | add edi, 7 |
||
1195 | repnz scasb |
||
1196 | pop edi |
||
1197 | cld |
||
1198 | jz .tilde |
||
1199 | ; tilde is not found, insert "~1" at end |
||
1200 | add edi, 6 |
||
1201 | cmp word [edi], ' ' |
||
1202 | jnz .insert_tilde |
||
1203 | @@: dec edi |
||
1204 | cmp byte [edi], ' ' |
||
1205 | jz @b |
||
1206 | inc edi |
||
1207 | .insert_tilde: |
||
1208 | mov word [edi], '~1' |
||
1209 | popad |
||
1210 | ; clc ; CF already cleared |
||
1211 | ret |
||
1212 | .tilde: |
||
1213 | push edi |
||
1214 | add edi, 7 |
||
1215 | xor ecx, ecx |
||
1216 | @@: |
||
1217 | ; after tilde may be only digits and trailing spaces |
||
1218 | cmp byte [edi], '~' |
||
1219 | jz .break |
||
1220 | cmp byte [edi], ' ' |
||
1221 | jz .space |
||
1222 | cmp byte [edi], '9' |
||
1223 | jnz .found |
||
1224 | dec edi |
||
1225 | jmp @b |
||
1226 | .space: |
||
1227 | dec edi |
||
1228 | inc ecx |
||
1229 | jmp @b |
||
1230 | .found: |
||
1231 | inc byte [edi] |
||
1232 | .succ: |
||
1233 | pop edi |
||
1234 | popad |
||
1235 | clc |
||
1236 | ret |
||
1237 | .break: |
||
1238 | jecxz .noplace |
||
1239 | inc edi |
||
1240 | mov al, '1' |
||
1241 | @@: |
||
1242 | xchg al, [edi] |
||
1243 | inc edi |
||
1244 | cmp al, ' ' |
||
1245 | mov al, '0' |
||
1246 | jnz @b |
||
1247 | jmp .succ |
||
1248 | .noplace: |
||
1249 | dec edi |
||
1250 | cmp edi, [esp] |
||
1251 | jz .err |
||
1252 | add dword [esp], 8 |
||
1253 | mov word [edi], '~1' |
||
1254 | inc edi |
||
1255 | inc edi |
||
1256 | @@: |
||
1257 | mov byte [edi], '0' |
||
1258 | inc edi |
||
1259 | cmp edi, [esp] |
||
1260 | jb @b |
||
1261 | pop edi |
||
1262 | popad |
||
1263 | ;clc ; automatically |
||
1264 | ret |
||
1265 | .err: |
||
1266 | pop edi |
||
1267 | popad |
||
1268 | stc |
||
1269 | ret |
||
1270 | |||
1271 | fat_gen_short_name: |
||
1272 | ; in: esi->long name |
||
1273 | ; edi->buffer (8+3=11 chars) |
||
1274 | ; out: buffer filled |
||
1275 | pushad |
||
1276 | mov eax, ' ' |
||
1277 | push edi |
||
1278 | stosd |
||
1279 | stosd |
||
1280 | stosd |
||
1281 | pop edi |
||
1282 | xor eax, eax |
||
1283 | push 8 |
||
1284 | pop ebx |
||
1285 | lea ecx, [edi+8] |
||
1286 | .loop: |
||
1287 | lodsb |
||
1288 | test al, al |
||
1289 | jz .done |
||
1290 | call char_toupper |
||
1291 | cmp al, ' ' |
||
1292 | jz .space |
||
1293 | cmp al, 80h |
||
1294 | ja .big |
||
1295 | test [fat_legal_chars+eax], 2 |
||
1296 | jnz .symbol |
||
1297 | .inv_symbol: |
||
1298 | mov al, '_' |
||
1299 | or bh, 1 |
||
1300 | .symbol: |
||
1301 | cmp al, '.' |
||
1302 | jz .dot |
||
1303 | .normal_symbol: |
||
1304 | dec bl |
||
1305 | jns .store |
||
1306 | mov bl, 0 |
||
1307 | .space: |
||
1308 | or bh, 1 |
||
1309 | jmp .loop |
||
1310 | .store: |
||
1311 | stosb |
||
1312 | jmp .loop |
||
1313 | .big: |
||
1314 | cmp al, 0xB0 |
||
1315 | jb .normal_symbol |
||
1316 | cmp al, 0xE0 |
||
1317 | jb .inv_symbol |
||
1318 | cmp al, 0xF0 |
||
1319 | jb .normal_symbol |
||
1320 | jmp .inv_symbol |
||
1321 | .dot: |
||
1322 | test bh, 2 |
||
1323 | jz .firstdot |
||
1324 | pop ebx |
||
1325 | add ebx, edi |
||
1326 | sub ebx, ecx |
||
1327 | push ebx |
||
1328 | cmp edi, ecx |
||
1329 | jbe .skip |
||
1330 | @@: |
||
1331 | dec edi |
||
1332 | mov al, ' ' |
||
1333 | xchg al, [edi] |
||
1334 | dec ebx |
||
1335 | mov [ebx], al |
||
1336 | cmp edi, ecx |
||
1337 | ja @b |
||
1338 | .skip: |
||
1339 | mov bh, 3 |
||
1340 | jmp @f |
||
1341 | .firstdot: |
||
1342 | cmp bl, 8 |
||
1343 | jz .space |
||
1344 | push edi |
||
1345 | or bh, 2 |
||
1346 | @@: |
||
1347 | mov edi, ecx |
||
1348 | mov bl, 3 |
||
1349 | jmp .loop |
||
1350 | .done: |
||
1351 | test bh, 2 |
||
1352 | jz @f |
||
1353 | pop edi |
||
1354 | @@: |
||
1355 | lea edi, [ecx-8] |
||
1356 | test bh, 1 |
||
1357 | jz @f |
||
1358 | call fat_next_short_name |
||
1359 | @@: |
||
1360 | popad |
||
1361 | ret |
||
1362 | |||
1363 | ;---------------------------------------------------------------- |
||
1364 | ; |
||
1365 | ; fs_RamdiskRewrite - LFN variant for writing sys floppy |
||
1366 | ; |
||
1367 | ; esi points to filename |
||
1368 | ; ebx ignored (reserved) |
||
1369 | ; ecx number of bytes to write, 0+ |
||
1370 | ; edx mem location to data |
||
1371 | ; |
||
1372 | ; ret ebx = number of written bytes |
||
1373 | ; eax = 0 ok read or other = errormsg |
||
1374 | ; |
||
1375 | ;-------------------------------------------------------------- |
||
1376 | @@: |
||
1377 | mov eax, ERROR_ACCESS_DENIED |
||
1378 | xor ebx, ebx |
||
1379 | ret |
||
1380 | |||
1381 | fs_RamdiskRewrite: |
||
1382 | cmp byte [esi], 0 |
||
1383 | jz @b |
||
1384 | ; ramdisk doesn't support folders |
||
1385 | push esi |
||
1386 | @@: |
||
1387 | lodsb |
||
1388 | test al, al |
||
1389 | jz @f |
||
1390 | cmp al, '/' |
||
1391 | jnz @b |
||
1392 | pop esi |
||
1393 | .err5: |
||
1394 | mov eax, 5 ; file not found |
||
1395 | xor ebx, ebx |
||
1396 | ret |
||
1397 | @@: |
||
1398 | pop esi |
||
1399 | ; check existence |
||
1400 | push edi |
||
1401 | call rd_find_lfn |
||
1402 | jc .notfound |
||
1403 | ; found, delete FAT chain |
||
1404 | push edi |
||
1405 | xor eax, eax |
||
1406 | mov dword [edi+28], eax ; zero size |
||
1407 | xchg ax, word [edi+26] ; start cluster |
||
1408 | test eax, eax |
||
1409 | jz .done1 |
||
1410 | @@: |
||
1411 | cmp eax, 0xFF8 |
||
1412 | jae .done1 |
||
1413 | lea edi, [0x280000 + eax*2] ; position in FAT |
||
1414 | xor eax, eax |
||
1415 | xchg ax, [edi] |
||
1416 | jmp @b |
||
1417 | .done1: |
||
1418 | pop edi |
||
1419 | call get_time_for_file |
||
1420 | mov [edi+22], ax |
||
1421 | call get_date_for_file |
||
1422 | mov [edi+24], ax |
||
1423 | mov [edi+18], ax |
||
1424 | or byte [edi+11], 20h ; set 'archive' attribute |
||
1425 | jmp .doit |
||
1426 | .notfound: |
||
1427 | ; file is not found; generate short name |
||
1428 | call fat_name_is_legal |
||
1429 | jc @f |
||
1430 | pop edi |
||
1431 | jmp .err5 |
||
1432 | @@: |
||
1433 | sub esp, 12 |
||
1434 | mov edi, esp |
||
1435 | call fat_gen_short_name |
||
1436 | .test_short_name_loop: |
||
1437 | push esi ecx |
||
1438 | mov esi, 0x100000+512*19 |
||
1439 | .test_short_name_entry: |
||
1440 | cmp byte [esi+11], 0xF |
||
1441 | jz .test_short_name_cont |
||
1442 | mov ecx, 11 |
||
1443 | push esi edi |
||
1444 | repz cmpsb |
||
1445 | pop edi esi |
||
1446 | jz .short_name_found |
||
1447 | .test_short_name_cont: |
||
1448 | add esi, 20h |
||
1449 | cmp esi, 0x100000+512*33 |
||
1450 | jb .test_short_name_entry |
||
1451 | pop ecx esi |
||
1452 | jmp .found |
||
1453 | .short_name_found: |
||
1454 | call fat_next_short_name |
||
1455 | pop ecx esi |
||
1456 | jnc .test_short_name_loop |
||
1457 | .disk_full: |
||
1458 | add esp, 12 |
||
1459 | pop edi |
||
1460 | mov eax, ERROR_DISK_FULL |
||
1461 | xor ebx, ebx |
||
1462 | ret |
||
1463 | .found: |
||
1464 | ; now find space in directory |
||
1465 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
||
1466 | mov al, '~' |
||
1467 | push ecx edi |
||
1468 | mov ecx, 8 |
||
1469 | repnz scasb |
||
1470 | push 1 |
||
1471 | pop eax ; 1 entry |
||
1472 | jnz .notilde |
||
1473 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
||
1474 | xor eax, eax |
||
1475 | @@: |
||
1476 | cmp byte [esi], 0 |
||
1477 | jz @f |
||
1478 | inc esi |
||
1479 | inc eax |
||
1480 | jmp @b |
||
1481 | @@: |
||
1482 | sub esi, eax |
||
1483 | add eax, 12+13 |
||
1484 | mov ecx, 13 |
||
1485 | push edx |
||
1486 | cdq |
||
1487 | div ecx |
||
1488 | pop edx |
||
1489 | .notilde: |
||
1490 | ; find |
||
1491 | xor ecx, ecx |
||
1492 | mov edi, 0x100000+512*19 |
||
1493 | .scan_dir: |
||
1494 | cmp byte [edi], 0 |
||
1495 | jz .free |
||
1496 | cmp byte [edi], 0xE5 |
||
1497 | jz .free |
||
1498 | xor ecx, ecx |
||
1499 | .scan_cont: |
||
1500 | add edi, 0x20 |
||
1501 | cmp edi, 0x100000+512*33 |
||
1502 | jb .scan_dir |
||
1503 | pop edi ecx |
||
1504 | jmp .disk_full |
||
1505 | .free: |
||
1506 | inc ecx |
||
1507 | cmp ecx, eax |
||
1508 | jb .scan_cont |
||
1509 | ; found! |
||
1510 | ; calculate name checksum |
||
1511 | push esi ecx |
||
1512 | mov esi, [esp+8] |
||
1513 | mov ecx, 11 |
||
1514 | xor eax, eax |
||
1515 | @@: |
||
1516 | ror al, 1 |
||
1517 | add al, [esi] |
||
1518 | inc esi |
||
1519 | loop @b |
||
1520 | pop ecx esi |
||
1521 | ; edi points to last entry in free chunk |
||
1522 | dec ecx |
||
1523 | jz .nolfn |
||
1524 | push esi |
||
1525 | push edi |
||
1526 | .writelfn: |
||
1527 | sub edi, 20h |
||
1528 | push ecx eax |
||
1529 | mov eax, [esp+8] |
||
1530 | sub eax, edi |
||
1531 | shr eax, 5 |
||
1532 | cmp ecx, 1 |
||
1533 | jnz @f |
||
1534 | or al, 40h |
||
1535 | @@: |
||
1536 | stosb |
||
1537 | mov cl, 5 |
||
1538 | call .read_symbols |
||
1539 | mov ax, 0xF |
||
1540 | stosw |
||
1541 | pop eax |
||
1542 | stosb |
||
1543 | push eax |
||
1544 | mov cl, 6 |
||
1545 | call .read_symbols |
||
1546 | xor eax, eax |
||
1547 | stosw |
||
1548 | mov cl, 2 |
||
1549 | call .read_symbols |
||
1550 | pop eax ecx |
||
1551 | sub edi, 0x20 |
||
1552 | loop .writelfn |
||
1553 | pop edi |
||
1554 | pop esi |
||
1555 | .nolfn: |
||
1556 | xchg esi, [esp] |
||
1557 | mov ecx, 11 |
||
1558 | rep movsb |
||
1559 | mov word [edi], 20h ; attributes |
||
1560 | sub edi, 11 |
||
1561 | pop esi ecx |
||
1562 | add esp, 12 |
||
1563 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
||
1564 | call get_time_for_file |
||
1565 | mov [edi+14], ax ; creation time |
||
1566 | mov [edi+22], ax ; last write time |
||
1567 | call get_date_for_file |
||
1568 | mov [edi+16], ax ; creation date |
||
1569 | mov [edi+24], ax ; last write date |
||
1570 | mov [edi+18], ax ; last access date |
||
1571 | and word [edi+20], 0 ; high word of cluster |
||
1572 | and word [edi+26], 0 ; low word of cluster - to be filled |
||
1573 | and dword [edi+28], 0 ; file size - to be filled |
||
1574 | .doit: |
||
1575 | push ecx edx |
||
1576 | push ecx |
||
1577 | push edi |
||
1578 | add edi, 26 ; edi points to low word of cluster |
||
1579 | push edi |
||
1580 | jecxz .done |
||
1581 | mov ecx, 2849 |
||
1582 | mov edi, 0x280000 |
||
1583 | .write_loop: |
||
1584 | ; allocate new cluster |
||
1585 | xor eax, eax |
||
1586 | repnz scasw |
||
1587 | jnz .disk_full2 |
||
1588 | dec edi |
||
1589 | dec edi |
||
1590 | lea eax, [edi-0x280000] |
||
1591 | shr eax, 1 ; eax = cluster |
||
1592 | mov word [edi], 0xFFF ; mark as last cluster |
||
1593 | xchg edi, [esp] |
||
1594 | stosw |
||
1595 | pop edi |
||
1596 | push edi |
||
1597 | inc ecx |
||
1598 | ; write data |
||
1599 | shl eax, 9 |
||
1600 | add eax, 0x100000+31*512 |
||
1601 | mov ebx, edx |
||
1602 | xchg eax, ebx |
||
1603 | push ecx |
||
1604 | mov ecx, 512 |
||
1605 | cmp dword [esp+12], ecx |
||
1606 | jae @f |
||
1607 | mov ecx, [esp+12] |
||
1608 | @@: |
||
1609 | call memmove |
||
1610 | add edx, ecx |
||
1611 | sub [esp+12], ecx |
||
1612 | pop ecx |
||
1613 | jnz .write_loop |
||
1614 | .done: |
||
1615 | mov ebx, edx |
||
1616 | pop edi edi ecx edx ecx |
||
1617 | sub ebx, edx |
||
1618 | mov [edi+28], ebx |
||
1619 | pop edi |
||
1620 | xor eax, eax |
||
1621 | ret |
||
1622 | .disk_full2: |
||
1623 | mov ebx, edx |
||
1624 | pop edi edi ecx edx ecx |
||
1625 | sub ebx, edx |
||
1626 | mov [edi+28], ebx |
||
1627 | pop edi |
||
1628 | push ERROR_DISK_FULL |
||
1629 | pop eax |
||
1630 | ret |
||
1631 | |||
1632 | .read_symbol: |
||
1633 | or ax, -1 |
||
1634 | test esi, esi |
||
1635 | jz .retFFFF |
||
1636 | lodsb |
||
1637 | test al, al |
||
1638 | jnz ansi2uni_char |
||
1639 | xor eax, eax |
||
1640 | xor esi, esi |
||
1641 | .retFFFF: |
||
1642 | ret |
||
1643 | |||
1644 | .read_symbols: |
||
1645 | call .read_symbol |
||
1646 | stosw |
||
1647 | loop .read_symbols |
||
1648 | ret |
||
1649 | |||
86 | diamond | 1650 | fs_RamdiskGetFileInfo: |
1651 | cmp byte [esi], 0 |
||
1652 | jnz @f |
||
1653 | mov eax, 2 ; unsupported |
||
1654 | ret |
||
1655 | @@: |
||
1656 | push edi |
||
1657 | call rd_find_lfn |
||
1658 | fs_GetFileInfo_finish: |
||
1659 | jnc @f |
||
1660 | pop edi |
||
1661 | mov eax, ERROR_FILE_NOT_FOUND |
||
1662 | ret |
||
1663 | @@: |
||
1664 | push esi ebp |
||
1665 | xor ebp, ebp |
||
1666 | mov esi, edx |
||
1667 | and dword [esi+4], 0 |
||
1668 | call fat_entry_to_bdfe2 |
||
1669 | pop ebp esi |
||
1670 | pop edi |
||
1671 | xor eax, eax |
||
1672 | ret |
||
1673 | |||
1674 | fs_RamdiskSetFileInfo: |
||
1675 | cmp byte [esi], 0 |
||
1676 | jnz @f |
||
1677 | mov eax, 2 ; unsupported |
||
1678 | ret |
||
1679 | @@: |
||
1680 | push edi |
||
1681 | call rd_find_lfn |
||
1682 | jnc @f |
||
1683 | pop edi |
||
1684 | mov eax, ERROR_FILE_NOT_FOUND |
||
1685 | ret |
||
1686 | @@: |
||
1687 | call bdfe_to_fat_entry |
||
1688 | pop edi |
||
1689 | xor eax, eax |
||
1690 | ret |
||
1691 | |||
78 | diamond | 1692 | ; \end{diamond}=>=>=>=>>->->-> |