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Rev | Author | Line No. | Line |
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5578 | Pathoswith | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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6468 | pathoswith | 3 | ;; Copyright (C) KolibriOS team 2004-2016. All rights reserved. ;; |
4 | ;; Distributed under terms of the GNU General Public License. ;; |
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5578 | Pathoswith | 5 | ;; ;; |
6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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2288 | clevermous | 7 | |
8 | $Revision: 6867 $ |
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9 | |||
6468 | pathoswith | 10 | ; FAT external functions |
11 | ; in: |
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12 | ; ebx -> parameter structure of sysfunc 70 |
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13 | ; ebp -> FAT structure |
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6471 | pathoswith | 14 | ; esi -> path string in UTF-8 |
6468 | pathoswith | 15 | ; out: |
16 | ; eax, ebx = return values for sysfunc 70 |
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17 | iglobal |
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18 | align 4 |
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19 | fat_user_functions: |
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20 | dd fat_free |
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21 | dd (fat_user_functions_end - fat_user_functions - 4) / 4 |
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22 | dd fat_Read |
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23 | dd fat_ReadFolder |
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24 | dd fat_CreateFile |
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25 | dd fat_Write |
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26 | dd fat_SetFileEnd |
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27 | dd fat_GetFileInfo |
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28 | dd fat_SetFileInfo |
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29 | dd 0 |
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30 | dd fat_Delete |
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31 | dd fat_CreateFolder |
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32 | fat_user_functions_end: |
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33 | endg |
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34 | |||
2288 | clevermous | 35 | cache_max equ 1919 ; max. is 1919*512+0x610000=0x6ffe00 |
36 | |||
37 | PUSHAD_EAX equ [esp+28] |
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38 | PUSHAD_ECX equ [esp+24] |
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39 | PUSHAD_EDX equ [esp+20] |
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40 | PUSHAD_EBX equ [esp+16] |
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41 | PUSHAD_EBP equ [esp+8] |
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42 | PUSHAD_ESI equ [esp+4] |
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43 | PUSHAD_EDI equ [esp+0] |
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44 | |||
2643 | clevermous | 45 | ; Internal data for every FAT partition. |
3742 | clevermous | 46 | struct FAT PARTITION |
6468 | pathoswith | 47 | fs_type db ? |
48 | fat_change db ? ; 1=fat has changed |
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49 | rb 2 |
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50 | Lock MUTEX ; currently operations with one partition |
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5578 | Pathoswith | 51 | ; can not be executed in parallel since the legacy code is not ready |
6468 | pathoswith | 52 | SECTORS_PER_FAT dd ? |
53 | NUMBER_OF_FATS dd ? |
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54 | SECTORS_PER_CLUSTER dd ? |
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55 | BYTES_PER_SECTOR dd ? ; Note: if BPS <> 512 need lots of changes |
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56 | ROOT_CLUSTER dd ? ; first rootdir cluster |
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57 | FAT_START dd ? ; start of fat table |
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58 | ROOT_START dd ? ; start of rootdir (only fat16) |
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59 | ROOT_SECTORS dd ? ; count of rootdir sectors (only fat16) |
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60 | DATA_START dd ? ; start of data area (=first cluster 2) |
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61 | LAST_CLUSTER dd ? ; last availabe cluster |
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62 | ADR_FSINFO dd ? ; used only by fat32 |
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63 | fatRESERVED dd ? |
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64 | fatBAD dd ? |
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65 | fatEND dd ? |
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66 | fatMASK dd ? |
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67 | fatStartScan dd ? |
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68 | cluster_tmp dd ? ; used by analyze_directory and analyze_directory_to_write |
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69 | longname_sec1 dd ? ; used by analyze_directory to save 2 previous |
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70 | longname_sec2 dd ? ; directory sectors for delete long filename |
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71 | fat_in_cache dd ? |
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4273 | clevermous | 72 | ; For FAT16/FAT32, this points to 512-byte buffer for the current sector of FAT. |
73 | ; For FAT12, the entire FAT structure is read |
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74 | ; and unpacked from 12bit per cluster to word per cluster. |
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75 | ; Note: work with unpacked copy of FAT12 means |
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76 | ; additional memory and additional code for packing/unpacking. |
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77 | ; I'm not sure that the economy justifies the cost, but anyway, |
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78 | ; there is how work was done before my edits, and I'm just keeping the principle. |
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6468 | pathoswith | 79 | fat_cache_ptr dd ? |
80 | fat12_unpacked_ptr dd ? |
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81 | buffer rb 512 |
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82 | fsinfo_buffer rb 512 |
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2643 | clevermous | 83 | ends |
84 | |||
2288 | clevermous | 85 | uglobal |
86 | align 4 |
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6468 | pathoswith | 87 | partition_count dd ? ; partitions found by set_FAT32_variables |
88 | hd_error dd ? |
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89 | hd_setup dd ? |
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90 | hd_wait_timeout dd ? |
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91 | cache_search_start dd ? ; used by find_empty_slot |
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5578 | Pathoswith | 92 | Sector512: ; label for dev_hdcd.inc |
93 | buffer: |
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94 | rb 512 |
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2288 | clevermous | 95 | endg |
96 | |||
2643 | clevermous | 97 | ; these labels are located before the main function to make |
98 | ; most of jumps to these be short |
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99 | fat_create_partition.free_return0: |
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100 | mov eax, ebp |
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101 | call free |
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102 | pop ebp |
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103 | fat_create_partition.return0: |
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104 | xor eax, eax |
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105 | ret |
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6867 | pathoswith | 106 | |
2643 | clevermous | 107 | fat_create_partition: |
5089 | clevermous | 108 | cmp dword [esi+DISK.MediaInfo.SectorSize], 512 |
109 | jnz .return0 |
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2643 | clevermous | 110 | ; bootsector must have been successfully read |
3742 | clevermous | 111 | cmp dword [esp+4], 0 |
2643 | clevermous | 112 | jnz .return0 |
113 | ; bootsector signature must be correct |
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114 | cmp word [ebx+0x1fe], 0xaa55 |
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115 | jnz .return0 |
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116 | ; sectors per cluster must be nonzero |
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117 | cmp byte [ebx+0xd], 0 |
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118 | jz .return0 |
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119 | ; bytes per sector must be 0x200 |
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120 | cmp word [ebx+0xb], 0x200 |
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121 | jnz .return0 |
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122 | ; number of fats must be nonzero |
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123 | cmp byte [ebx+0x10], 0 |
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124 | jz .return0 |
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125 | ; The only reason to be invalid partition now is FAT12. Since the test for |
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126 | ; FAT size requires knowledge of some calculated values, which are also used |
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127 | ; in the normal operation, let's hope for the best and allocate data now; if |
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128 | ; it will prove wrong, just deallocate it. |
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3598 | clevermous | 129 | movi eax, sizeof.FAT |
2643 | clevermous | 130 | call malloc |
131 | test eax, eax |
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132 | jz .return0 |
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3742 | clevermous | 133 | mov ecx, dword [ebp+PARTITION.FirstSector] |
134 | mov dword [eax+FAT.FirstSector], ecx |
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135 | mov ecx, dword [ebp+PARTITION.FirstSector+4] |
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136 | mov dword [eax+FAT.FirstSector+4], ecx |
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137 | mov ecx, dword [ebp+PARTITION.Length] |
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138 | mov dword [eax+FAT.Length], ecx |
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139 | mov ecx, dword [ebp+PARTITION.Length+4] |
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140 | mov dword [eax+FAT.Length+4], ecx |
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141 | mov ecx, [ebp+PARTITION.Disk] |
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142 | mov [eax+FAT.Disk], ecx |
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143 | mov [eax+FAT.FSUserFunctions], fat_user_functions |
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2643 | clevermous | 144 | or [eax+FAT.fat_in_cache], -1 |
145 | mov [eax+FAT.fat_change], 0 |
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146 | push ebp |
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147 | mov ebp, eax |
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148 | lea ecx, [ebp+FAT.Lock] |
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149 | call mutex_init |
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150 | movzx eax, word [ebx+0xe] ; sectors reserved |
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151 | mov [ebp+FAT.FAT_START], eax |
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152 | movzx eax, byte [ebx+0xd] ; sectors per cluster |
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153 | mov [ebp+FAT.SECTORS_PER_CLUSTER], eax |
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154 | movzx ecx, word [ebx+0xb] ; bytes per sector |
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155 | mov [ebp+FAT.BYTES_PER_SECTOR], ecx |
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156 | movzx eax, word [ebx+0x11] ; count of rootdir entries (=0 fat32) |
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157 | shl eax, 5 ; mul 32 |
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158 | dec ecx |
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159 | add eax, ecx ; round up if not equal count |
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160 | inc ecx ; bytes per sector |
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161 | xor edx, edx |
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162 | div ecx |
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163 | mov [ebp+FAT.ROOT_SECTORS], eax ; count of rootdir sectors |
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164 | movzx eax, word [ebx+0x16] ; sectors per fat <65536 |
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165 | test eax, eax |
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166 | jnz @f |
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167 | mov eax, [ebx+0x24] ; sectors per fat |
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2288 | clevermous | 168 | @@: |
2643 | clevermous | 169 | mov [ebp+FAT.SECTORS_PER_FAT], eax |
170 | movzx eax, byte [ebx+0x10] ; number of fats |
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171 | mov [ebp+FAT.NUMBER_OF_FATS], eax |
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4273 | clevermous | 172 | mul [ebp+FAT.SECTORS_PER_FAT] |
173 | test edx, edx |
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174 | jnz .free_return0 |
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2643 | clevermous | 175 | add eax, [ebp+FAT.FAT_START] |
4273 | clevermous | 176 | jc .free_return0 |
2643 | clevermous | 177 | mov [ebp+FAT.ROOT_START], eax ; rootdir = fat_start + fat_size * fat_count |
178 | add eax, [ebp+FAT.ROOT_SECTORS] ; rootdir sectors should be 0 on fat32 |
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4273 | clevermous | 179 | jc .free_return0 |
2643 | clevermous | 180 | mov [ebp+FAT.DATA_START], eax ; data area = rootdir + rootdir_size |
181 | movzx eax, word [ebx+0x13] ; total sector count <65536 |
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182 | test eax, eax |
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183 | jnz @f |
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184 | mov eax, [ebx+0x20] ; total sector count |
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185 | @@: |
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4273 | clevermous | 186 | cmp dword [ebp+FAT.Length+4], 0 |
187 | jnz @f |
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188 | cmp eax, dword [ebp+FAT.Length] |
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189 | ja .free_return0 |
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190 | @@: |
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3742 | clevermous | 191 | mov dword [ebp+FAT.Length], eax |
192 | and dword [ebp+FAT.Length+4], 0 |
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2643 | clevermous | 193 | sub eax, [ebp+FAT.DATA_START] ; eax = count of data sectors |
4273 | clevermous | 194 | jc .free_return0 |
2643 | clevermous | 195 | xor edx, edx |
196 | div [ebp+FAT.SECTORS_PER_CLUSTER] |
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197 | inc eax |
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198 | mov [ebp+FAT.LAST_CLUSTER], eax |
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199 | dec eax ; cluster count |
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4273 | clevermous | 200 | jz .free_return0 |
2643 | clevermous | 201 | mov [ebp+FAT.fatStartScan], 2 |
6867 | pathoswith | 202 | ; limits by Microsoft Hardware White Paper v1.03 |
203 | cmp eax, 0xff5 |
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4273 | clevermous | 204 | jb .fat12 |
6867 | pathoswith | 205 | cmp eax, 0xfff5 |
2643 | clevermous | 206 | jb .fat16 |
207 | .fat32: |
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208 | mov eax, [ebx+0x2c] ; rootdir cluster |
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209 | mov [ebp+FAT.ROOT_CLUSTER], eax |
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210 | movzx eax, word [ebx+0x30] |
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211 | mov [ebp+FAT.ADR_FSINFO], eax |
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212 | push ebx |
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213 | add ebx, 512 |
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214 | call fs_read32_sys |
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215 | test eax, eax |
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216 | jnz @f |
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217 | mov eax, [ebx+0x1ec] |
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218 | cmp eax, -1 |
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2288 | clevermous | 219 | jz @f |
2643 | clevermous | 220 | mov [ebp+FAT.fatStartScan], eax |
2288 | clevermous | 221 | @@: |
2643 | clevermous | 222 | pop ebx |
223 | mov [ebp+FAT.fatRESERVED], 0x0FFFFFF6 |
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224 | mov [ebp+FAT.fatBAD], 0x0FFFFFF7 |
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225 | mov [ebp+FAT.fatEND], 0x0FFFFFF8 |
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226 | mov [ebp+FAT.fatMASK], 0x0FFFFFFF |
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227 | mov al, 32 |
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4273 | clevermous | 228 | .fat_not_12_finalize: |
2643 | clevermous | 229 | mov [ebp+FAT.fs_type], al |
4273 | clevermous | 230 | ; For FAT16 and FAT32, allocate 512 bytes for FAT cache. |
231 | mov eax, 512 |
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232 | call malloc |
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233 | test eax, eax |
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234 | jz .free_return0 |
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235 | mov [ebp+FAT.fat_cache_ptr], eax |
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2643 | clevermous | 236 | mov eax, ebp |
237 | pop ebp |
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2288 | clevermous | 238 | ret |
6867 | pathoswith | 239 | |
2643 | clevermous | 240 | .fat16: |
241 | and [ebp+FAT.ROOT_CLUSTER], 0 |
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242 | mov [ebp+FAT.fatRESERVED], 0x0000FFF6 |
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243 | mov [ebp+FAT.fatBAD], 0x0000FFF7 |
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244 | mov [ebp+FAT.fatEND], 0x0000FFF8 |
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245 | mov [ebp+FAT.fatMASK], 0x0000FFFF |
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246 | mov al, 16 |
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4273 | clevermous | 247 | jmp .fat_not_12_finalize |
6867 | pathoswith | 248 | |
4273 | clevermous | 249 | .fat12: |
250 | and [ebp+FAT.ROOT_CLUSTER], 0 |
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251 | mov [ebp+FAT.fatRESERVED], 0xFF6 |
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252 | mov [ebp+FAT.fatBAD], 0xFF7 |
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253 | mov [ebp+FAT.fatEND], 0xFFF |
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254 | mov [ebp+FAT.fatMASK], 0xFFF |
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255 | mov al, 12 |
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2643 | clevermous | 256 | mov [ebp+FAT.fs_type], al |
4273 | clevermous | 257 | ; For FAT12, allocate&read data for entire table: |
258 | ; calculate A = ALIGN_UP(NUM_CLUSTERS, 8), |
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259 | ; allocate ALIGN_UP(A*3/2, 512) bytes for FAT table plus A*2 bytes for unpacked data. |
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260 | mov eax, [ebp+FAT.LAST_CLUSTER] |
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261 | and eax, not 7 |
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262 | add eax, 8 |
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263 | mov edx, eax |
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264 | lea eax, [eax*3] |
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265 | add eax, 512*2-1 |
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266 | shr eax, 10 |
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267 | shl eax, 9 |
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268 | lea eax, [eax+edx*2] |
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269 | call malloc |
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270 | test eax, eax |
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271 | jz .free_return0 |
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272 | ; Read ALIGN_UP(NUM_CLUSTERS*3/2, 512) bytes. |
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273 | push ebx |
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274 | mov [ebp+FAT.fat_cache_ptr], eax |
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275 | mov edx, [ebp+FAT.LAST_CLUSTER] |
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276 | lea edx, [(edx+1)*3 + 512*2-1] |
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277 | shr edx, 10 |
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278 | xchg eax, ebx |
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279 | xor eax, eax |
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280 | .read_fat: |
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281 | push eax |
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282 | add eax, [ebp+FAT.FAT_START] |
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283 | call fs_read32_sys |
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284 | test eax, eax |
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285 | pop eax |
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286 | jz @f |
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287 | mov eax, [ebp+FAT.fat_cache_ptr] |
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288 | call free |
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289 | pop ebx |
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290 | jmp .free_return0 |
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6867 | pathoswith | 291 | |
4273 | clevermous | 292 | @@: |
293 | add ebx, 512 |
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294 | inc eax |
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295 | cmp eax, edx |
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296 | jb .read_fat |
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297 | mov [ebp+FAT.fat12_unpacked_ptr], ebx |
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298 | pushad |
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299 | mov esi, [ebp+FAT.fat_cache_ptr] |
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300 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
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301 | mov edx, [ebp+FAT.LAST_CLUSTER] |
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302 | and edx, not 7 |
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303 | lea edx, [edi+(edx+8)*2] |
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304 | push edx |
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6867 | pathoswith | 305 | @@: |
4273 | clevermous | 306 | mov eax, dword [esi] |
307 | mov ebx, dword [esi+4] |
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308 | mov ecx, dword [esi+8] |
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309 | mov edx, ecx |
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6867 | pathoswith | 310 | shr edx, 4 |
311 | shr dx, 4 |
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4273 | clevermous | 312 | xor ch, ch |
6867 | pathoswith | 313 | shld ecx, ebx, 20 |
314 | shr cx, 4 |
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4273 | clevermous | 315 | shld ebx, eax, 12 |
6867 | pathoswith | 316 | and ebx, 0x0fffffff |
317 | shr bx, 4 |
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4273 | clevermous | 318 | shl eax, 4 |
6867 | pathoswith | 319 | and eax, 0x0fffffff |
320 | shr ax, 4 |
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4273 | clevermous | 321 | mov dword [edi], eax |
322 | mov dword [edi+4], ebx |
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323 | mov dword [edi+8], ecx |
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324 | mov dword [edi+12], edx |
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325 | add edi, 16 |
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326 | add esi, 12 |
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327 | cmp edi, [esp] |
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6867 | pathoswith | 328 | jnz @b |
4273 | clevermous | 329 | pop eax |
330 | popad |
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6867 | pathoswith | 331 | mov eax, ebp |
332 | pop ebx ebp |
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4273 | clevermous | 333 | ret |
334 | |||
6867 | pathoswith | 335 | fat_free: |
4273 | clevermous | 336 | push eax |
6867 | pathoswith | 337 | mov eax, [eax+FAT.fat_cache_ptr] |
338 | call free |
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4273 | clevermous | 339 | pop eax |
6867 | pathoswith | 340 | jmp free |
4273 | clevermous | 341 | |
342 | iglobal |
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343 | label fat_legal_chars byte |
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344 | ; 0 = not allowed |
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345 | ; 1 = allowed only in long names |
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346 | ; 3 = allowed |
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347 | times 32 db 0 |
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348 | ; ! " # $ % & ' ( ) * + , - . / |
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349 | db 1,3,0,3,3,3,3,3,3,3,0,1,1,3,3,0 |
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350 | ; 0 1 2 3 4 5 6 7 8 9 : ; < = > ? |
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351 | db 3,3,3,3,3,3,3,3,3,3,0,1,0,1,0,0 |
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352 | ; @ A B C D E F G H I J K L M N O |
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353 | db 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 |
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354 | ; P Q R S T U V W X Y Z [ \ ] ^ _ |
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355 | db 3,3,3,3,3,3,3,3,3,3,3,1,0,1,3,3 |
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356 | ; ` a b c d e f g h i j k l m n o |
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357 | db 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 |
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358 | ; p q r s t u v w x y z { | } ~ |
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359 | db 3,3,3,3,3,3,3,3,3,3,3,3,0,3,3,0 |
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360 | endg |
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361 | |||
362 | fat_name_is_legal: |
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6471 | pathoswith | 363 | ; in: esi -> UTF-8 name |
364 | ; out: CF=1 -> legal |
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4273 | clevermous | 365 | push esi |
366 | xor eax, eax |
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367 | @@: |
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368 | lodsb |
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369 | test al, al |
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6471 | pathoswith | 370 | js @b |
4273 | clevermous | 371 | test [fat_legal_chars+eax], 1 |
372 | jnz @b |
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6471 | pathoswith | 373 | test al, al |
374 | jnz @f |
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375 | stc |
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376 | @@: |
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4273 | clevermous | 377 | pop esi |
378 | ret |
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379 | |||
380 | fat_next_short_name: |
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381 | ; in: edi->8+3 name |
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6867 | pathoswith | 382 | ; out: name corrected, CF=1 -> error |
4273 | clevermous | 383 | pushad |
384 | mov ecx, 8 |
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385 | mov al, '~' |
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386 | std |
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387 | push edi |
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388 | add edi, 7 |
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389 | repnz scasb |
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390 | pop edi |
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391 | cld |
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392 | jz .tilde |
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393 | ; tilde is not found, insert "~1" at end |
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394 | add edi, 6 |
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395 | cmp word [edi], ' ' |
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396 | jnz .insert_tilde |
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397 | @@: |
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398 | dec edi |
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399 | cmp byte [edi], ' ' |
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400 | jz @b |
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401 | inc edi |
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402 | .insert_tilde: |
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403 | mov word [edi], '~1' |
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404 | popad |
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405 | clc |
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406 | ret |
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6867 | pathoswith | 407 | |
4273 | clevermous | 408 | .tilde: |
409 | push edi |
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410 | add edi, 7 |
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411 | xor ecx, ecx |
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6867 | pathoswith | 412 | @@: ; after tilde may be only digits and trailing spaces |
4273 | clevermous | 413 | cmp byte [edi], '~' |
414 | jz .break |
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415 | cmp byte [edi], ' ' |
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416 | jz .space |
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417 | cmp byte [edi], '9' |
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418 | jnz .found |
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419 | dec edi |
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420 | jmp @b |
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6867 | pathoswith | 421 | |
4273 | clevermous | 422 | .space: |
423 | dec edi |
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424 | inc ecx |
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425 | jmp @b |
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6867 | pathoswith | 426 | |
4273 | clevermous | 427 | .found: |
428 | inc byte [edi] |
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429 | add dword [esp], 8 |
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430 | jmp .zerorest |
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6867 | pathoswith | 431 | |
4273 | clevermous | 432 | .break: |
433 | jecxz .noplace |
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434 | inc edi |
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435 | mov al, '1' |
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436 | @@: |
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437 | xchg al, [edi] |
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438 | inc edi |
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439 | cmp al, ' ' |
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440 | mov al, '0' |
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441 | jnz @b |
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442 | .succ: |
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443 | pop edi |
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444 | popad |
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445 | clc |
||
446 | ret |
||
6867 | pathoswith | 447 | |
4273 | clevermous | 448 | .noplace: |
449 | dec edi |
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450 | cmp edi, [esp] |
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451 | jz .err |
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452 | add dword [esp], 8 |
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453 | mov word [edi], '~1' |
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454 | inc edi |
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455 | inc edi |
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456 | @@: |
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457 | mov byte [edi], '0' |
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458 | .zerorest: |
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459 | inc edi |
||
460 | cmp edi, [esp] |
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461 | jb @b |
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462 | pop edi |
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463 | popad |
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464 | ret |
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6867 | pathoswith | 465 | |
4273 | clevermous | 466 | .err: |
467 | pop edi |
||
468 | popad |
||
469 | stc |
||
470 | ret |
||
471 | |||
472 | fat_gen_short_name: |
||
6471 | pathoswith | 473 | ; in: |
474 | ; esi -> UTF-8 name |
||
475 | ; edi -> buffer (8+3=11 chars) |
||
4273 | clevermous | 476 | pushad |
477 | mov eax, ' ' |
||
478 | push edi |
||
479 | stosd |
||
480 | stosd |
||
481 | stosd |
||
482 | pop edi |
||
483 | xor eax, eax |
||
484 | movi ebx, 8 |
||
485 | lea ecx, [edi+8] |
||
486 | .loop: |
||
487 | lodsb |
||
488 | test al, al |
||
6471 | pathoswith | 489 | js .space |
4273 | clevermous | 490 | jz .done |
6471 | pathoswith | 491 | test [fat_legal_chars+eax], 2 |
4273 | clevermous | 492 | jz .space |
493 | cmp al, '.' |
||
494 | jz .dot |
||
495 | dec bl |
||
496 | jns .store |
||
6471 | pathoswith | 497 | inc bl |
4273 | clevermous | 498 | .space: |
499 | or bh, 1 |
||
500 | jmp .loop |
||
6471 | pathoswith | 501 | |
4273 | clevermous | 502 | .store: |
6471 | pathoswith | 503 | call cp866toUpper |
4273 | clevermous | 504 | stosb |
505 | jmp .loop |
||
6471 | pathoswith | 506 | |
4273 | clevermous | 507 | .dot: |
508 | test bh, 2 |
||
509 | jz .firstdot |
||
510 | pop ebx |
||
511 | add ebx, edi |
||
512 | sub ebx, ecx |
||
513 | push ebx |
||
514 | cmp ebx, ecx |
||
515 | jb @f |
||
516 | pop ebx |
||
517 | push ecx |
||
518 | @@: |
||
519 | cmp edi, ecx |
||
520 | jbe .skip |
||
521 | @@: |
||
522 | dec edi |
||
523 | mov al, [edi] |
||
524 | dec ebx |
||
525 | mov [ebx], al |
||
526 | mov byte [edi], ' ' |
||
527 | cmp edi, ecx |
||
528 | ja @b |
||
529 | .skip: |
||
530 | mov bh, 3 |
||
531 | jmp @f |
||
6867 | pathoswith | 532 | |
4273 | clevermous | 533 | .firstdot: |
534 | cmp bl, 8 |
||
535 | jz .space |
||
536 | push edi |
||
537 | or bh, 2 |
||
538 | @@: |
||
539 | mov edi, ecx |
||
540 | mov bl, 3 |
||
541 | jmp .loop |
||
6867 | pathoswith | 542 | |
4273 | clevermous | 543 | .done: |
544 | test bh, 2 |
||
545 | jz @f |
||
546 | pop edi |
||
547 | @@: |
||
548 | lea edi, [ecx-8] |
||
549 | test bh, 1 |
||
550 | jz @f |
||
551 | call fat_next_short_name |
||
552 | @@: |
||
553 | popad |
||
554 | ret |
||
555 | |||
2288 | clevermous | 556 | set_FAT: |
6867 | pathoswith | 557 | ; in: eax = cluster, edx = value to save |
558 | ; out: edx = old value, CF=1 -> error |
||
2288 | clevermous | 559 | push eax ebx esi |
560 | cmp eax, 2 |
||
6867 | pathoswith | 561 | jc .ret |
562 | cmp [ebp+FAT.LAST_CLUSTER], eax |
||
563 | jc .ret |
||
4273 | clevermous | 564 | cmp [ebp+FAT.fs_type], 12 |
6867 | pathoswith | 565 | je .FAT12 |
2643 | clevermous | 566 | cmp [ebp+FAT.fs_type], 16 |
6867 | pathoswith | 567 | je @f |
2288 | clevermous | 568 | add eax, eax |
6867 | pathoswith | 569 | @@: |
2288 | clevermous | 570 | add eax, eax |
571 | mov esi, 511 |
||
6867 | pathoswith | 572 | and esi, eax |
573 | shr eax, 9 |
||
2643 | clevermous | 574 | add eax, [ebp+FAT.FAT_START] |
4273 | clevermous | 575 | mov ebx, [ebp+FAT.fat_cache_ptr] |
6867 | pathoswith | 576 | cmp eax, [ebp+FAT.fat_in_cache] |
577 | je .inCache |
||
578 | cmp [ebp+FAT.fat_change], 0 |
||
579 | je @f |
||
580 | call write_fat_sector |
||
581 | jc .ret |
||
582 | @@: |
||
583 | mov [ebp+FAT.fat_in_cache], eax |
||
2643 | clevermous | 584 | call fs_read32_sys |
585 | test eax, eax |
||
6867 | pathoswith | 586 | jne .error |
587 | .inCache: |
||
2643 | clevermous | 588 | cmp [ebp+FAT.fs_type], 16 |
6867 | pathoswith | 589 | jne .test32 |
2288 | clevermous | 590 | xchg [ebx+esi], dx ; save new value and get old value |
6867 | pathoswith | 591 | jmp .write |
2288 | clevermous | 592 | |
6867 | pathoswith | 593 | .test32: |
2643 | clevermous | 594 | mov eax, [ebp+FAT.fatMASK] |
2288 | clevermous | 595 | and edx, eax |
596 | xor eax, -1 ; mask for high bits |
||
597 | and eax, [ebx+esi] ; get high 4 bits |
||
598 | or eax, edx |
||
599 | mov edx, [ebx+esi] ; get old value |
||
600 | mov [ebx+esi], eax ; save new value |
||
6867 | pathoswith | 601 | .write: |
602 | mov [ebp+FAT.fat_change], 1 |
||
2643 | clevermous | 603 | and edx, [ebp+FAT.fatMASK] |
6867 | pathoswith | 604 | .ret: |
2288 | clevermous | 605 | pop esi ebx eax |
606 | ret |
||
6867 | pathoswith | 607 | |
608 | .error: |
||
2643 | clevermous | 609 | stc |
6867 | pathoswith | 610 | jmp .ret |
2288 | clevermous | 611 | |
6867 | pathoswith | 612 | .FAT12: |
4273 | clevermous | 613 | test edx, 0xF000 |
6867 | pathoswith | 614 | jnz .error |
4273 | clevermous | 615 | mov ebx, [ebp+FAT.fat12_unpacked_ptr] |
616 | xchg [ebx+eax*2], dx |
||
617 | mov [ebp+FAT.fat_change], 1 |
||
6867 | pathoswith | 618 | jmp .ret |
2288 | clevermous | 619 | |
620 | get_FAT: |
||
6867 | pathoswith | 621 | ; in: eax = cluster |
622 | ; out: eax = next cluster, CF=1 -> error |
||
2288 | clevermous | 623 | push ebx esi |
4273 | clevermous | 624 | cmp [ebp+FAT.fs_type], 12 |
6867 | pathoswith | 625 | je .FAT12 |
2643 | clevermous | 626 | cmp [ebp+FAT.fs_type], 16 |
6867 | pathoswith | 627 | je @f |
2288 | clevermous | 628 | add eax, eax |
6867 | pathoswith | 629 | @@: |
2288 | clevermous | 630 | add eax, eax |
631 | mov esi, 511 |
||
6867 | pathoswith | 632 | and esi, eax |
633 | shr eax, 9 |
||
2643 | clevermous | 634 | add eax, [ebp+FAT.FAT_START] |
4273 | clevermous | 635 | mov ebx, [ebp+FAT.fat_cache_ptr] |
6867 | pathoswith | 636 | cmp eax, [ebp+FAT.fat_in_cache] |
637 | je .inCache |
||
638 | cmp [ebp+FAT.fat_change], 0 |
||
639 | je @f |
||
640 | call write_fat_sector |
||
641 | jc .ret |
||
642 | @@: |
||
2643 | clevermous | 643 | mov [ebp+FAT.fat_in_cache], eax |
644 | call fs_read32_sys |
||
645 | test eax, eax |
||
6867 | pathoswith | 646 | jnz .error |
647 | .inCache: |
||
2288 | clevermous | 648 | mov eax, [ebx+esi] |
2643 | clevermous | 649 | and eax, [ebp+FAT.fatMASK] |
6867 | pathoswith | 650 | .ret: |
2288 | clevermous | 651 | pop esi ebx |
652 | ret |
||
6867 | pathoswith | 653 | |
654 | .error: |
||
2643 | clevermous | 655 | stc |
6867 | pathoswith | 656 | jmp .ret |
2288 | clevermous | 657 | |
6867 | pathoswith | 658 | .FAT12: |
4273 | clevermous | 659 | mov ebx, [ebp+FAT.fat12_unpacked_ptr] |
660 | movzx eax, word [ebx+eax*2] |
||
6867 | pathoswith | 661 | jmp .ret |
2288 | clevermous | 662 | |
663 | get_free_FAT: |
||
6867 | pathoswith | 664 | ; out: eax = number of first free cluster, CF=1 -> disk full |
2288 | clevermous | 665 | push ecx |
6867 | pathoswith | 666 | mov ecx, [ebp+FAT.LAST_CLUSTER] |
2643 | clevermous | 667 | mov eax, [ebp+FAT.fatStartScan] |
4273 | clevermous | 668 | cmp [ebp+FAT.fs_type], 12 |
669 | jz get_free_FAT12 |
||
670 | dec ecx |
||
2288 | clevermous | 671 | cmp eax, 2 |
6867 | pathoswith | 672 | jb .reset |
673 | .test: |
||
674 | cmp eax, [ebp+FAT.LAST_CLUSTER] |
||
675 | jbe .inRange |
||
676 | .reset: |
||
2288 | clevermous | 677 | mov eax, 2 |
6867 | pathoswith | 678 | .inRange: |
2288 | clevermous | 679 | push eax |
6867 | pathoswith | 680 | call get_FAT |
681 | jc @f |
||
682 | test eax, eax |
||
2288 | clevermous | 683 | pop eax |
6867 | pathoswith | 684 | je .found |
685 | inc eax |
||
686 | dec ecx |
||
687 | jnz .test |
||
688 | .notFound: |
||
689 | pop ecx |
||
2288 | clevermous | 690 | stc |
691 | ret |
||
692 | |||
6867 | pathoswith | 693 | @@: |
2643 | clevermous | 694 | pop eax |
6867 | pathoswith | 695 | jmp .notFound |
2643 | clevermous | 696 | |
6867 | pathoswith | 697 | .found: |
2288 | clevermous | 698 | lea ecx, [eax+1] |
2643 | clevermous | 699 | mov [ebp+FAT.fatStartScan], ecx |
2288 | clevermous | 700 | pop ecx |
701 | clc |
||
702 | ret |
||
703 | |||
4273 | clevermous | 704 | get_free_FAT12: |
705 | push edx edi |
||
706 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
||
707 | cmp eax, 2 |
||
708 | jb .reset |
||
709 | cmp eax, ecx |
||
710 | jbe @f |
||
711 | .reset: |
||
712 | mov eax, 2 |
||
713 | @@: |
||
714 | mov edx, eax |
||
715 | lea edi, [edi+eax*2] |
||
716 | sub ecx, eax |
||
717 | inc ecx |
||
718 | xor eax, eax |
||
719 | repnz scasw |
||
720 | jz .found |
||
721 | cmp edx, 2 |
||
722 | jz .notfound |
||
723 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
||
724 | lea ecx, [edx-2] |
||
725 | repnz scasw |
||
726 | jnz .notfound |
||
727 | .found: |
||
728 | sub edi, [ebp+FAT.fat12_unpacked_ptr] |
||
729 | shr edi, 1 |
||
730 | mov [ebp+FAT.fatStartScan], edi |
||
731 | lea eax, [edi-1] |
||
6867 | pathoswith | 732 | @@: |
4273 | clevermous | 733 | pop edi edx ecx |
734 | ret |
||
6867 | pathoswith | 735 | |
4273 | clevermous | 736 | .notfound: |
737 | stc |
||
6867 | pathoswith | 738 | jmp @b |
2288 | clevermous | 739 | |
740 | write_fat_sector: |
||
741 | push eax ebx ecx |
||
2643 | clevermous | 742 | mov [ebp+FAT.fat_change], 0 |
743 | mov eax, [ebp+FAT.fat_in_cache] |
||
2288 | clevermous | 744 | cmp eax, -1 |
6867 | pathoswith | 745 | jz @f |
4273 | clevermous | 746 | mov ebx, [ebp+FAT.fat_cache_ptr] |
2643 | clevermous | 747 | mov ecx, [ebp+FAT.NUMBER_OF_FATS] |
6867 | pathoswith | 748 | .write_next_fat: |
2643 | clevermous | 749 | push eax |
750 | call fs_write32_sys |
||
751 | test eax, eax |
||
752 | pop eax |
||
6867 | pathoswith | 753 | jnz @f |
2643 | clevermous | 754 | add eax, [ebp+FAT.SECTORS_PER_FAT] |
2288 | clevermous | 755 | dec ecx |
6867 | pathoswith | 756 | jnz .write_next_fat |
757 | @@: |
||
2288 | clevermous | 758 | pop ecx ebx eax |
759 | ret |
||
760 | |||
761 | get_date_for_file: |
||
6867 | pathoswith | 762 | ; out in ax: |
763 | ; bits 0-4 = day |
||
764 | ; bits 5-8 = month |
||
765 | ; bits 9-15 = count of years from 1980 |
||
766 | mov al, 7 |
||
767 | call fsReadCMOS |
||
2288 | clevermous | 768 | ror eax, 5 |
6867 | pathoswith | 769 | mov al, 8 |
770 | call fsReadCMOS |
||
2288 | clevermous | 771 | ror eax, 4 |
6867 | pathoswith | 772 | mov al, 9 |
773 | call fsReadCMOS |
||
774 | add ax, 20 |
||
775 | rol eax, 9 |
||
2288 | clevermous | 776 | ret |
777 | |||
778 | get_time_for_file: |
||
6867 | pathoswith | 779 | ; out in ax: |
780 | ; bits 0-4 = second (the low bit is lost) |
||
781 | ; bits 5-10 = minute |
||
782 | ; bits 11-15 = hour |
||
783 | mov al, 0 |
||
784 | call fsReadCMOS |
||
2288 | clevermous | 785 | ror eax, 6 |
6867 | pathoswith | 786 | mov al, 2 |
787 | call fsReadCMOS |
||
2288 | clevermous | 788 | ror eax, 6 |
6867 | pathoswith | 789 | mov al, 4 |
790 | call fsReadCMOS |
||
2288 | clevermous | 791 | rol eax, 11 |
792 | ret |
||
793 | |||
794 | add_disk_free_space: |
||
6867 | pathoswith | 795 | ; in: ecx = cluster count (signed) |
796 | test ecx, ecx |
||
797 | je .ret |
||
798 | cmp [ebp+FAT.fs_type], 32 |
||
799 | jne .ret |
||
2288 | clevermous | 800 | push eax ebx |
2643 | clevermous | 801 | mov eax, [ebp+FAT.ADR_FSINFO] |
802 | lea ebx, [ebp+FAT.fsinfo_buffer] |
||
803 | call fs_read32_sys |
||
804 | test eax, eax |
||
6867 | pathoswith | 805 | jnz @f |
806 | cmp dword [ebx+0x1fc], 0xaa550000 ; check sector id |
||
807 | jne @f |
||
2288 | clevermous | 808 | add [ebx+0x1e8], ecx |
2643 | clevermous | 809 | push [ebp+FAT.fatStartScan] |
2288 | clevermous | 810 | pop dword [ebx+0x1ec] |
2643 | clevermous | 811 | mov eax, [ebp+FAT.ADR_FSINFO] |
812 | call fs_write32_sys |
||
6867 | pathoswith | 813 | @@: |
2288 | clevermous | 814 | pop ebx eax |
6867 | pathoswith | 815 | .ret: |
2288 | clevermous | 816 | ret |
817 | |||
818 | clear_cluster_chain: |
||
6867 | pathoswith | 819 | ; in: eax = first cluster |
2288 | clevermous | 820 | push eax ecx edx |
821 | xor ecx, ecx ; cluster count |
||
6867 | pathoswith | 822 | @@: |
823 | cmp eax, [ebp+FAT.LAST_CLUSTER] |
||
824 | ja @f |
||
825 | cmp eax, 2 |
||
826 | jb @f |
||
827 | cmp eax, [ebp+FAT.ROOT_CLUSTER] |
||
828 | jz @f |
||
2288 | clevermous | 829 | xor edx, edx |
6867 | pathoswith | 830 | call set_FAT |
831 | jc .ret |
||
832 | inc ecx |
||
833 | mov eax, edx |
||
834 | jmp @b |
||
2288 | clevermous | 835 | |
6867 | pathoswith | 836 | @@: |
837 | call add_disk_free_space |
||
2643 | clevermous | 838 | clc |
6867 | pathoswith | 839 | .ret: |
2288 | clevermous | 840 | pop edx ecx eax |
841 | ret |
||
842 | |||
843 | update_disk: |
||
6867 | pathoswith | 844 | cmp [ebp+FAT.fat_change], 0 |
845 | jz .noChange |
||
4273 | clevermous | 846 | cmp [ebp+FAT.fs_type], 12 |
847 | jz .fat12 |
||
2288 | clevermous | 848 | call write_fat_sector |
6867 | pathoswith | 849 | jc .ret |
850 | .noChange: |
||
2643 | clevermous | 851 | mov esi, [ebp+PARTITION.Disk] |
852 | call disk_sync |
||
6867 | pathoswith | 853 | .ret: |
2288 | clevermous | 854 | ret |
855 | |||
6867 | pathoswith | 856 | .fat12: |
857 | mov esi, [ebp+FAT.fat12_unpacked_ptr] |
||
858 | mov edi, [ebp+FAT.fat_cache_ptr] |
||
859 | mov edx, [ebp+FAT.LAST_CLUSTER] |
||
860 | and edx, not 7 |
||
861 | lea edx, [esi+(edx+8)*2] |
||
862 | @@: |
||
863 | mov eax, dword [esi] |
||
864 | mov ebx, dword [esi+4] |
||
865 | shl ax, 4 |
||
866 | shl eax, 4 |
||
867 | shl bx, 4 |
||
868 | shr ebx, 4 |
||
869 | shrd eax, ebx, 8 |
||
870 | shr ebx, 8 |
||
871 | mov dword [edi], eax |
||
872 | mov word [edi+4], bx |
||
873 | add edi, 6 |
||
874 | add esi, 8 |
||
875 | cmp esi, edx |
||
876 | jb @b |
||
877 | mov esi, [ebp+FAT.NUMBER_OF_FATS] |
||
878 | mov edx, [ebp+FAT.LAST_CLUSTER] |
||
879 | lea edx, [(edx+1)*3 + 512*2-1] |
||
880 | shr edx, 10 |
||
881 | push [ebp+FAT.FAT_START] |
||
882 | .write_fats: |
||
883 | xor eax, eax |
||
884 | mov ebx, [ebp+FAT.fat_cache_ptr] |
||
885 | .loop1: |
||
886 | push eax |
||
887 | add eax, [esp+4] |
||
888 | call fs_write32_sys |
||
889 | test eax, eax |
||
890 | pop eax |
||
891 | jnz @f |
||
892 | add ebx, 512 |
||
893 | inc eax |
||
894 | cmp eax, edx |
||
895 | jb .loop1 |
||
896 | pop eax |
||
897 | add eax, [ebp+FAT.SECTORS_PER_FAT] |
||
898 | push eax |
||
899 | dec esi |
||
900 | jnz .write_fats |
||
901 | @@: |
||
902 | pop eax |
||
903 | mov [ebp+FAT.fat_change], 0 |
||
904 | jmp .noChange |
||
905 | |||
2643 | clevermous | 906 | fat_lock: |
907 | lea ecx, [ebp+FAT.Lock] |
||
908 | jmp mutex_lock |
||
6867 | pathoswith | 909 | |
2643 | clevermous | 910 | fat_unlock: |
911 | lea ecx, [ebp+FAT.Lock] |
||
912 | jmp mutex_unlock |
||
2288 | clevermous | 913 | |
4273 | clevermous | 914 | fat_get_name: |
6471 | pathoswith | 915 | ; in: edi -> FAT entry |
916 | ; out: ebp -> UTF-16 name, CF=1 -> no valid entry |
||
4273 | clevermous | 917 | cmp byte [edi], 0 |
918 | jz .no |
||
919 | cmp byte [edi], 0xE5 |
||
6471 | pathoswith | 920 | jz .no |
4273 | clevermous | 921 | cmp byte [edi+11], 0xF |
922 | jz .longname |
||
923 | test byte [edi+11], 8 |
||
924 | jnz .no |
||
6471 | pathoswith | 925 | push ecx esi edi |
926 | mov esi, edi |
||
927 | mov edi, ebp |
||
4273 | clevermous | 928 | mov ecx, 8 |
929 | @@: |
||
6471 | pathoswith | 930 | lodsb |
4273 | clevermous | 931 | call ansi2uni_char |
6471 | pathoswith | 932 | stosw |
4273 | clevermous | 933 | loop @b |
6471 | pathoswith | 934 | mov cl, 8 |
4273 | clevermous | 935 | @@: |
6471 | pathoswith | 936 | cmp word [edi-2], ' ' |
4273 | clevermous | 937 | jnz @f |
6471 | pathoswith | 938 | sub edi, 2 |
4273 | clevermous | 939 | loop @b |
940 | @@: |
||
6471 | pathoswith | 941 | mov word [edi], '.' |
942 | add edi, 2 |
||
943 | mov cl, 3 |
||
4273 | clevermous | 944 | @@: |
6471 | pathoswith | 945 | lodsb |
4273 | clevermous | 946 | call ansi2uni_char |
6471 | pathoswith | 947 | stosw |
4273 | clevermous | 948 | loop @b |
6471 | pathoswith | 949 | mov cl, 3 |
4273 | clevermous | 950 | @@: |
6471 | pathoswith | 951 | cmp word [edi-2], ' ' |
4273 | clevermous | 952 | jnz @f |
6471 | pathoswith | 953 | sub edi, 2 |
4273 | clevermous | 954 | loop @b |
6471 | pathoswith | 955 | sub edi, 2 |
4273 | clevermous | 956 | @@: |
6471 | pathoswith | 957 | and word [edi], 0 ; CF=0 |
958 | pop edi esi ecx |
||
4273 | clevermous | 959 | ret |
6471 | pathoswith | 960 | |
961 | .no: |
||
962 | stc |
||
963 | ret |
||
964 | |||
4273 | clevermous | 965 | .longname: |
966 | mov al, byte [edi] |
||
967 | and eax, 0x3F |
||
968 | dec eax |
||
969 | cmp al, 20 |
||
970 | jae .no ; ignore invalid entries |
||
971 | mov word [ebp+260*2], 0 ; force null-terminating for orphans |
||
972 | imul eax, 13*2 |
||
973 | test byte [edi], 0x40 |
||
974 | jz @f |
||
6471 | pathoswith | 975 | mov word [ebp+eax+13*2], 0 |
976 | @@: ; copy name (13 chars in UTF-16) |
||
4273 | clevermous | 977 | push esi edi |
6471 | pathoswith | 978 | lea esi, [edi+1] |
979 | lea edi, [ebp+eax] |
||
980 | movsd |
||
981 | movsd |
||
982 | movsd |
||
983 | inc esi |
||
984 | sub edi, 2 |
||
985 | movsd |
||
986 | movsd |
||
987 | movsd |
||
988 | add esi, 2 |
||
989 | movsd |
||
4273 | clevermous | 990 | pop edi esi |
6471 | pathoswith | 991 | test eax, eax |
992 | jnz .no ; if this is not first entry, more processing required |
||
4273 | clevermous | 993 | ret |
994 | |||
995 | fat_compare_name: |
||
6471 | pathoswith | 996 | ; in: esi -> name in UTF-8, ebp -> name in UTF-16 |
997 | ; out: |
||
998 | ; ZF=1 -> names match, esi -> next component of name |
||
999 | ; ZF=0 -> esi is not changed |
||
4273 | clevermous | 1000 | push ebp esi |
6471 | pathoswith | 1001 | @@: |
1002 | call utf8to16 |
||
1003 | call utf16toUpper |
||
1004 | mov edx, eax |
||
1005 | mov ax, [ebp] |
||
1006 | call utf16toUpper |
||
1007 | cmp ax, dx |
||
4273 | clevermous | 1008 | jnz .done |
6471 | pathoswith | 1009 | add ebp, 2 |
1010 | test ax, ax |
||
1011 | jnz @b |
||
4273 | clevermous | 1012 | dec esi |
6471 | pathoswith | 1013 | pop eax ebp |
1014 | xor eax, eax ; set ZF |
||
4273 | clevermous | 1015 | ret |
6471 | pathoswith | 1016 | |
4273 | clevermous | 1017 | .done: |
6471 | pathoswith | 1018 | cmp dx, '/' |
4273 | clevermous | 1019 | jnz @f |
6471 | pathoswith | 1020 | test ax, ax |
4273 | clevermous | 1021 | jnz @f |
6471 | pathoswith | 1022 | mov [esp], esi |
4273 | clevermous | 1023 | @@: |
1024 | pop esi ebp |
||
1025 | ret |
||
1026 | |||
1027 | fat_find_lfn: |
||
6471 | pathoswith | 1028 | ; in: esi -> name in UTF-8 |
4273 | clevermous | 1029 | ; [esp+4] = next |
1030 | ; [esp+8] = first |
||
1031 | ; [esp+C]... - possibly parameters for first and next |
||
1032 | ; out: CF=1 - file not found, eax=error code |
||
1033 | ; else CF=0, esi->next name component, edi->direntry |
||
1034 | pusha |
||
1035 | lea eax, [esp+0Ch+20h] |
||
1036 | call dword [eax-4] |
||
1037 | jc .reterr |
||
1038 | sub esp, 262*2 ; reserve place for LFN |
||
1039 | .l1: |
||
6471 | pathoswith | 1040 | lea ebp, [esp] |
4273 | clevermous | 1041 | call fat_get_name |
1042 | jc .l2 |
||
1043 | call fat_compare_name |
||
1044 | jz .found |
||
1045 | .l2: |
||
6471 | pathoswith | 1046 | mov ebp, [esp+8+262*2] |
1047 | lea eax, [esp+0Ch+20h+262*2] |
||
4273 | clevermous | 1048 | call dword [eax-8] |
1049 | jnc .l1 |
||
6471 | pathoswith | 1050 | add esp, 262*2 |
4273 | clevermous | 1051 | .reterr: |
1052 | mov [esp+28], eax |
||
1053 | stc |
||
1054 | popa |
||
1055 | ret |
||
6471 | pathoswith | 1056 | |
4273 | clevermous | 1057 | .found: |
6471 | pathoswith | 1058 | add esp, 262*2 |
4273 | clevermous | 1059 | mov ebp, [esp+8] |
1060 | ; if this is LFN entry, advance to true entry |
||
1061 | cmp byte [edi+11], 0xF |
||
1062 | jnz @f |
||
1063 | lea eax, [esp+0Ch+20h] |
||
1064 | call dword [eax-8] |
||
1065 | jc .reterr |
||
1066 | @@: |
||
6471 | pathoswith | 1067 | add esp, 8 ; CF=0 |
4273 | clevermous | 1068 | push esi |
1069 | push edi |
||
1070 | popa |
||
1071 | ret |
||
1072 | |||
1073 | fat_time_to_bdfe: |
||
1074 | ; in: eax=FAT time |
||
1075 | ; out: eax=BDFE time |
||
1076 | push ecx edx |
||
1077 | mov ecx, eax |
||
1078 | mov edx, eax |
||
1079 | shr eax, 11 |
||
1080 | shl eax, 16 ; hours |
||
1081 | and edx, 0x1F |
||
1082 | add edx, edx |
||
1083 | mov al, dl ; seconds |
||
1084 | shr ecx, 5 |
||
1085 | and ecx, 0x3F |
||
1086 | mov ah, cl ; minutes |
||
1087 | pop edx ecx |
||
1088 | ret |
||
1089 | |||
1090 | fat_date_to_bdfe: |
||
1091 | push ecx edx |
||
1092 | mov ecx, eax |
||
1093 | mov edx, eax |
||
1094 | shr eax, 9 |
||
1095 | add ax, 1980 |
||
1096 | shl eax, 16 ; year |
||
1097 | and edx, 0x1F |
||
1098 | mov al, dl ; day |
||
1099 | shr ecx, 5 |
||
1100 | and ecx, 0xF |
||
1101 | mov ah, cl ; month |
||
1102 | pop edx ecx |
||
1103 | ret |
||
1104 | |||
1105 | bdfe_to_fat_time: |
||
1106 | push edx |
||
1107 | mov edx, eax |
||
1108 | shr eax, 16 |
||
1109 | and dh, 0x3F |
||
1110 | shl eax, 6 |
||
1111 | or al, dh |
||
1112 | shr dl, 1 |
||
1113 | and dl, 0x1F |
||
1114 | shl eax, 5 |
||
1115 | or al, dl |
||
1116 | pop edx |
||
1117 | ret |
||
1118 | |||
1119 | bdfe_to_fat_date: |
||
1120 | push edx |
||
1121 | mov edx, eax |
||
1122 | shr eax, 16 |
||
1123 | sub ax, 1980 |
||
1124 | and dh, 0xF |
||
1125 | shl eax, 4 |
||
1126 | or al, dh |
||
1127 | and dl, 0x1F |
||
1128 | shl eax, 5 |
||
1129 | or al, dl |
||
1130 | pop edx |
||
1131 | ret |
||
1132 | |||
1133 | fat_entry_to_bdfe: |
||
1134 | ; convert FAT entry at edi to BDFE (block of data of folder entry) at esi, advance esi |
||
1135 | mov eax, [ebp-4] |
||
6471 | pathoswith | 1136 | mov [esi+4], eax ; cp866/UNICODE name |
4273 | clevermous | 1137 | fat_entry_to_bdfe2: |
1138 | movzx eax, byte [edi+11] |
||
1139 | mov [esi], eax ; attributes |
||
1140 | movzx eax, word [edi+14] |
||
1141 | call fat_time_to_bdfe |
||
1142 | mov [esi+8], eax ; creation time |
||
1143 | movzx eax, word [edi+16] |
||
1144 | call fat_date_to_bdfe |
||
1145 | mov [esi+12], eax ; creation date |
||
1146 | and dword [esi+16], 0 ; last access time is not supported on FAT |
||
1147 | movzx eax, word [edi+18] |
||
1148 | call fat_date_to_bdfe |
||
1149 | mov [esi+20], eax ; last access date |
||
1150 | movzx eax, word [edi+22] |
||
1151 | call fat_time_to_bdfe |
||
1152 | mov [esi+24], eax ; last write time |
||
1153 | movzx eax, word [edi+24] |
||
1154 | call fat_date_to_bdfe |
||
1155 | mov [esi+28], eax ; last write date |
||
1156 | mov eax, [edi+28] |
||
1157 | mov [esi+32], eax ; file size (low dword) |
||
1158 | xor eax, eax |
||
1159 | mov [esi+36], eax ; file size (high dword) |
||
1160 | test ebp, ebp |
||
1161 | jz .ret |
||
6576 | pathoswith | 1162 | add esi, 40 |
1163 | push edi esi |
||
1164 | mov edi, esi |
||
4273 | clevermous | 1165 | mov esi, ebp |
6798 | pathoswith | 1166 | cmp byte [ebp-4], 2 |
1167 | jz .utf16 |
||
1168 | cmp byte [ebp-4], 3 |
||
1169 | jz .utf8 |
||
1170 | @@: |
||
6576 | pathoswith | 1171 | lodsw |
6798 | pathoswith | 1172 | call uni2ansi_char |
1173 | stosb |
||
1174 | test al, al |
||
1175 | jnz @b |
||
6576 | pathoswith | 1176 | pop esi edi |
6798 | pathoswith | 1177 | add esi, 264 |
4273 | clevermous | 1178 | .ret: |
1179 | ret |
||
6471 | pathoswith | 1180 | |
6798 | pathoswith | 1181 | .utf8: |
1182 | push ecx |
||
1183 | mov ecx, 519 |
||
1184 | call UTF16to8_string |
||
1185 | pop ecx |
||
1186 | jmp @f |
||
1187 | |||
1188 | .utf16: |
||
6471 | pathoswith | 1189 | lodsw |
6798 | pathoswith | 1190 | stosw |
1191 | test eax, eax |
||
1192 | jnz .utf16 |
||
1193 | @@: |
||
6576 | pathoswith | 1194 | pop esi edi |
6798 | pathoswith | 1195 | add esi, 520 |
6576 | pathoswith | 1196 | ret |
4273 | clevermous | 1197 | |
1198 | bdfe_to_fat_entry: |
||
1199 | ; convert BDFE at edx to FAT entry at edi |
||
1200 | ; destroys eax |
||
1201 | ; attributes byte |
||
1202 | test byte [edi+11], 8 ; volume label? |
||
1203 | jnz @f |
||
1204 | mov al, [edx] |
||
1205 | and al, 0x27 |
||
1206 | and byte [edi+11], 0x10 |
||
1207 | or byte [edi+11], al |
||
1208 | @@: |
||
1209 | mov eax, [edx+8] |
||
1210 | call bdfe_to_fat_time |
||
1211 | mov [edi+14], ax ; creation time |
||
1212 | mov eax, [edx+12] |
||
1213 | call bdfe_to_fat_date |
||
1214 | mov [edi+16], ax ; creation date |
||
1215 | mov eax, [edx+20] |
||
1216 | call bdfe_to_fat_date |
||
1217 | mov [edi+18], ax ; last access date |
||
1218 | mov eax, [edx+24] |
||
1219 | call bdfe_to_fat_time |
||
1220 | mov [edi+22], ax ; last write time |
||
1221 | mov eax, [edx+28] |
||
1222 | call bdfe_to_fat_date |
||
1223 | mov [edi+24], ax ; last write date |
||
1224 | ret |
||
1225 | |||
2288 | clevermous | 1226 | hd_find_lfn: |
6471 | pathoswith | 1227 | ; in: esi -> path string in UTF-8 |
2643 | clevermous | 1228 | ; out: CF=1 - file not found, eax=error code |
2288 | clevermous | 1229 | ; else CF=0 and edi->direntry, eax=sector |
1230 | push esi edi |
||
1231 | push 0 |
||
1232 | push 0 |
||
4273 | clevermous | 1233 | push fat1x_root_first |
1234 | push fat1x_root_next |
||
2643 | clevermous | 1235 | mov eax, [ebp+FAT.ROOT_CLUSTER] |
1236 | cmp [ebp+FAT.fs_type], 32 |
||
2288 | clevermous | 1237 | jz .fat32 |
1238 | .loop: |
||
4273 | clevermous | 1239 | and [ebp+FAT.longname_sec1], 0 |
1240 | and [ebp+FAT.longname_sec2], 0 |
||
2288 | clevermous | 1241 | call fat_find_lfn |
1242 | jc .notfound |
||
1243 | cmp byte [esi], 0 |
||
1244 | jz .found |
||
1245 | test byte [edi+11], 10h |
||
1246 | jz .notfound |
||
1247 | and dword [esp+12], 0 |
||
1248 | mov eax, [edi+20-2] |
||
1249 | mov ax, [edi+26] ; cluster |
||
1250 | .fat32: |
||
1251 | mov [esp+8], eax |
||
1252 | mov dword [esp+4], fat_notroot_first |
||
1253 | mov dword [esp], fat_notroot_next |
||
1254 | jmp .loop |
||
6468 | pathoswith | 1255 | |
2288 | clevermous | 1256 | .notfound: |
1257 | add esp, 16 |
||
1258 | pop edi esi |
||
1259 | stc |
||
6468 | pathoswith | 1260 | ret |
1261 | |||
2288 | clevermous | 1262 | .found: |
1263 | lea eax, [esp+8] |
||
1264 | cmp dword [eax], 0 |
||
1265 | jz .root |
||
1266 | call fat_get_sector |
||
1267 | jmp .cmn |
||
6468 | pathoswith | 1268 | |
2288 | clevermous | 1269 | .root: |
1270 | mov eax, [eax+4] |
||
2643 | clevermous | 1271 | add eax, [ebp+FAT.ROOT_START] |
2288 | clevermous | 1272 | .cmn: |
1273 | add esp, 20 ; CF=0 |
||
1274 | pop esi |
||
6468 | pathoswith | 1275 | ret |
2288 | clevermous | 1276 | |
1277 | ;---------------------------------------------------------------- |
||
2643 | clevermous | 1278 | fat_Read: |
1279 | call fat_lock |
||
6468 | pathoswith | 1280 | call hd_find_lfn |
6845 | pathoswith | 1281 | jc .notFound |
5578 | Pathoswith | 1282 | test byte [edi+11], 0x10 ; do not allow read directories |
2288 | clevermous | 1283 | jnz .noaccess |
2643 | clevermous | 1284 | cmp dword [ebx+8], 0 |
6845 | pathoswith | 1285 | jnz .endOfFile |
5578 | Pathoswith | 1286 | mov edx, [ebx+4] ; file offset |
2643 | clevermous | 1287 | mov ecx, [ebx+12] ; size |
5578 | Pathoswith | 1288 | mov ebx, [ebx+16] ; buffer |
1289 | push ebx |
||
2288 | clevermous | 1290 | push 0 |
6037 | pathoswith | 1291 | test ecx, ecx |
1292 | jz .done |
||
2288 | clevermous | 1293 | mov eax, [edi+28] |
5578 | Pathoswith | 1294 | sub eax, edx |
1295 | jb .fileEnd |
||
2288 | clevermous | 1296 | cmp eax, ecx |
1297 | jae @f |
||
1298 | mov ecx, eax |
||
1299 | mov byte [esp], 6 |
||
1300 | @@: |
||
1301 | mov eax, [edi+20-2] |
||
1302 | mov ax, [edi+26] |
||
5578 | Pathoswith | 1303 | ; now eax=cluster, ebx=buffer for data, ecx=count, edx=position |
1304 | mov edi, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
1305 | shl edi, 9 |
||
1306 | @@: |
||
2643 | clevermous | 1307 | cmp eax, 2 |
5578 | Pathoswith | 1308 | jb .fileEnd |
2643 | clevermous | 1309 | cmp eax, [ebp+FAT.fatRESERVED] |
5578 | Pathoswith | 1310 | jae .fileEnd |
1311 | sub edx, edi |
||
1312 | jc @f |
||
1313 | call get_FAT |
||
1314 | jc .noaccess2 |
||
1315 | jmp @b |
||
6845 | pathoswith | 1316 | |
1317 | .notFound: |
||
1318 | push eax |
||
1319 | jmp .ret |
||
1320 | |||
1321 | .noaccess: |
||
1322 | push ERROR_ACCESS_DENIED |
||
1323 | jmp .ret |
||
1324 | |||
1325 | .endOfFile: |
||
1326 | push ERROR_END_OF_FILE |
||
1327 | .ret: |
||
1328 | call fat_unlock |
||
6867 | pathoswith | 1329 | pop eax |
6845 | pathoswith | 1330 | xor ebx, ebx |
1331 | ret |
||
1332 | |||
5578 | Pathoswith | 1333 | @@: |
1334 | mov esi, eax |
||
2288 | clevermous | 1335 | dec eax |
1336 | dec eax |
||
5578 | Pathoswith | 1337 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2643 | clevermous | 1338 | add eax, [ebp+FAT.DATA_START] |
5578 | Pathoswith | 1339 | add edx, edi |
1340 | jz .alignedCluster |
||
1341 | mov edi, edx |
||
1342 | shr edi, 9 |
||
1343 | add eax, edi |
||
1344 | and edx, 511 |
||
5840 | pathoswith | 1345 | cmp ecx, 512 |
1346 | jc .sectorPiece |
||
1347 | test edx, edx |
||
5578 | Pathoswith | 1348 | jz .alignedSector |
1349 | .sectorPiece: |
||
2643 | clevermous | 1350 | push eax ebx |
1351 | lea ebx, [ebp+FAT.buffer] |
||
1352 | call fs_read32_app |
||
1353 | test eax, eax |
||
2288 | clevermous | 1354 | mov eax, ebx |
1355 | pop ebx |
||
5578 | Pathoswith | 1356 | jne .noaccess3 |
1357 | add eax, edx |
||
2288 | clevermous | 1358 | push ecx |
5578 | Pathoswith | 1359 | add ecx, edx |
2288 | clevermous | 1360 | cmp ecx, 512 |
1361 | jbe @f |
||
1362 | mov ecx, 512 |
||
1363 | @@: |
||
5578 | Pathoswith | 1364 | sub ecx, edx |
2288 | clevermous | 1365 | call memmove |
1366 | sub [esp], ecx |
||
5578 | Pathoswith | 1367 | add ebx, ecx |
1368 | pop ecx eax |
||
1369 | xor edx, edx |
||
1370 | inc edi |
||
2288 | clevermous | 1371 | inc eax |
5578 | Pathoswith | 1372 | test ecx, ecx |
1373 | jz .done |
||
1374 | .alignedSector: |
||
1375 | shl edi, 9 |
||
1376 | add ecx, edi |
||
1377 | mov edi, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
1378 | shl edi, 9 |
||
1379 | .alignedCluster: |
||
1380 | cmp ecx, 512 |
||
1381 | jc .sectorPiece |
||
1382 | mov edx, eax |
||
1383 | mov eax, esi |
||
1384 | @@: |
||
1385 | sub ecx, edi |
||
1386 | jbe .readEnd |
||
2288 | clevermous | 1387 | call get_FAT |
5578 | Pathoswith | 1388 | jc .noaccess4 |
1389 | cmp eax, 2 |
||
1390 | jb .fileEnd2 |
||
1391 | cmp eax, [ebp+FAT.fatRESERVED] |
||
1392 | jae .fileEnd2 |
||
1393 | inc esi |
||
1394 | cmp eax, esi |
||
1395 | jz @b |
||
1396 | .fragmentEnd: |
||
1397 | xchg eax, esi |
||
1398 | dec eax |
||
1399 | dec eax |
||
1400 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
1401 | add eax, [ebp+FAT.DATA_START] |
||
1402 | push ecx |
||
1403 | mov ecx, eax |
||
5840 | pathoswith | 1404 | mov eax, esi |
1405 | dec eax |
||
1406 | dec eax |
||
1407 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
1408 | add eax, [ebp+FAT.DATA_START] |
||
1409 | push eax |
||
1410 | .readFragment: |
||
1411 | sub ecx, edx |
||
5578 | Pathoswith | 1412 | mov eax, edx |
1413 | xor edx, edx |
||
1414 | call fs_read64_app |
||
1415 | shl ecx, 9 |
||
1416 | add ebx, ecx |
||
1417 | test eax, eax |
||
2288 | clevermous | 1418 | pop eax |
5578 | Pathoswith | 1419 | jnz .noaccess3 |
1420 | pop ecx |
||
1421 | xor edx, edx |
||
6036 | pathoswith | 1422 | jecxz .done |
5578 | Pathoswith | 1423 | jmp .alignedCluster |
6845 | pathoswith | 1424 | |
5578 | Pathoswith | 1425 | .readEnd: |
1426 | add ecx, edi |
||
1427 | mov edi, ecx |
||
1428 | and ecx, 511 |
||
1429 | shr edi, 9 |
||
1430 | dec eax |
||
1431 | dec eax |
||
1432 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
1433 | add eax, [ebp+FAT.DATA_START] |
||
1434 | add eax, edi |
||
5840 | pathoswith | 1435 | push ecx |
1436 | push eax |
||
1437 | mov ecx, eax |
||
5578 | Pathoswith | 1438 | jmp .readFragment |
6845 | pathoswith | 1439 | |
5578 | Pathoswith | 1440 | .noaccess3: |
2288 | clevermous | 1441 | pop eax |
5578 | Pathoswith | 1442 | .noaccess2: |
1443 | mov byte [esp], ERROR_DEVICE |
||
2288 | clevermous | 1444 | .done: |
2643 | clevermous | 1445 | call fat_unlock |
6867 | pathoswith | 1446 | pop eax edx |
2288 | clevermous | 1447 | sub ebx, edx |
1448 | ret |
||
6845 | pathoswith | 1449 | |
5578 | Pathoswith | 1450 | .fileEnd: |
1451 | mov byte [esp], ERROR_END_OF_FILE |
||
1452 | jmp .done |
||
6845 | pathoswith | 1453 | |
5578 | Pathoswith | 1454 | .noaccess4: |
1455 | mov byte [esp], ERROR_DEVICE |
||
1456 | jmp @f |
||
6845 | pathoswith | 1457 | |
5578 | Pathoswith | 1458 | .fileEnd2: |
1459 | mov byte [esp], ERROR_END_OF_FILE |
||
1460 | @@: |
||
1461 | inc esi |
||
1462 | xor ecx, ecx |
||
1463 | jmp .fragmentEnd |
||
2288 | clevermous | 1464 | |
1465 | ;---------------------------------------------------------------- |
||
2643 | clevermous | 1466 | fat_ReadFolder: |
1467 | call fat_lock |
||
1468 | mov eax, [ebp+FAT.ROOT_CLUSTER] |
||
2288 | clevermous | 1469 | cmp byte [esi], 0 |
1470 | jz .doit |
||
6468 | pathoswith | 1471 | call hd_find_lfn |
6867 | pathoswith | 1472 | jc .error |
2288 | clevermous | 1473 | test byte [edi+11], 0x10 ; do not allow read files |
6867 | pathoswith | 1474 | jz .accessDenied |
2288 | clevermous | 1475 | mov eax, [edi+20-2] |
1476 | mov ax, [edi+26] ; eax=cluster |
||
1477 | .doit: |
||
2643 | clevermous | 1478 | push esi |
2288 | clevermous | 1479 | sub esp, 262*2 ; reserve space for LFN |
6471 | pathoswith | 1480 | push dword [ebx+8] ; cp866/UNICODE name |
2643 | clevermous | 1481 | mov edx, [ebx+16] ; pointer to buffer |
2288 | clevermous | 1482 | ; init header |
2643 | clevermous | 1483 | push eax |
2288 | clevermous | 1484 | mov edi, edx |
1485 | mov ecx, 32/4 |
||
1486 | xor eax, eax |
||
1487 | rep stosd |
||
2643 | clevermous | 1488 | pop eax |
2288 | clevermous | 1489 | mov byte [edx], 1 ; version |
1490 | mov esi, edi ; esi points to BDFE |
||
2643 | clevermous | 1491 | mov ecx, [ebx+12] ; number of blocks to read |
1492 | mov ebx, [ebx+4] ; index of the first block |
||
2288 | clevermous | 1493 | .new_cluster: |
2643 | clevermous | 1494 | mov [ebp+FAT.cluster_tmp], eax |
2288 | clevermous | 1495 | test eax, eax |
1496 | jnz @f |
||
2643 | clevermous | 1497 | cmp [ebp+FAT.fs_type], 32 |
2288 | clevermous | 1498 | jz .notfound |
2643 | clevermous | 1499 | mov eax, [ebp+FAT.ROOT_START] |
1500 | push [ebp+FAT.ROOT_SECTORS] |
||
2288 | clevermous | 1501 | push ebx |
1502 | jmp .new_sector |
||
6867 | pathoswith | 1503 | |
2288 | clevermous | 1504 | @@: |
1505 | dec eax |
||
1506 | dec eax |
||
2643 | clevermous | 1507 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
1508 | push [ebp+FAT.SECTORS_PER_CLUSTER] |
||
1509 | add eax, [ebp+FAT.DATA_START] |
||
2288 | clevermous | 1510 | push ebx |
1511 | .new_sector: |
||
2643 | clevermous | 1512 | lea ebx, [ebp+FAT.buffer] |
2288 | clevermous | 1513 | mov edi, ebx |
2643 | clevermous | 1514 | push eax |
1515 | call fs_read32_sys |
||
1516 | test eax, eax |
||
1517 | pop eax |
||
2288 | clevermous | 1518 | jnz .notfound2 |
1519 | add ebx, 512 |
||
1520 | push eax |
||
1521 | .l1: |
||
2643 | clevermous | 1522 | push ebp |
1523 | lea ebp, [esp+20] |
||
2288 | clevermous | 1524 | call fat_get_name |
2643 | clevermous | 1525 | pop ebp |
2288 | clevermous | 1526 | jc .l2 |
1527 | cmp byte [edi+11], 0xF |
||
1528 | jnz .do_bdfe |
||
1529 | add edi, 0x20 |
||
1530 | cmp edi, ebx |
||
1531 | jb .do_bdfe |
||
1532 | pop eax |
||
1533 | inc eax |
||
1534 | dec dword [esp+4] |
||
1535 | jnz @f |
||
2643 | clevermous | 1536 | mov eax, [ebp+FAT.cluster_tmp] |
2288 | clevermous | 1537 | test eax, eax |
1538 | jz .done |
||
1539 | call get_FAT |
||
2643 | clevermous | 1540 | jc .notfound2 |
2288 | clevermous | 1541 | cmp eax, 2 |
1542 | jb .done |
||
2643 | clevermous | 1543 | cmp eax, [ebp+FAT.fatRESERVED] |
2288 | clevermous | 1544 | jae .done |
1545 | push eax |
||
2643 | clevermous | 1546 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 1547 | mov [esp+8], eax |
1548 | pop eax |
||
2643 | clevermous | 1549 | mov [ebp+FAT.cluster_tmp], eax |
2288 | clevermous | 1550 | dec eax |
1551 | dec eax |
||
2643 | clevermous | 1552 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
1553 | add eax, [ebp+FAT.DATA_START] |
||
2288 | clevermous | 1554 | @@: |
2643 | clevermous | 1555 | lea ebx, [ebp+FAT.buffer] |
2288 | clevermous | 1556 | mov edi, ebx |
2643 | clevermous | 1557 | push eax |
1558 | call fs_read32_sys |
||
1559 | test eax, eax |
||
1560 | pop eax |
||
2288 | clevermous | 1561 | jnz .notfound2 |
1562 | add ebx, 512 |
||
1563 | push eax |
||
1564 | .do_bdfe: |
||
1565 | inc dword [edx+8] ; new file found |
||
1566 | dec dword [esp+4] |
||
1567 | jns .l2 |
||
1568 | dec ecx |
||
1569 | js .l2 |
||
1570 | inc dword [edx+4] ; new file block copied |
||
2643 | clevermous | 1571 | push ebp |
1572 | lea ebp, [esp+20] |
||
2288 | clevermous | 1573 | call fat_entry_to_bdfe |
2643 | clevermous | 1574 | pop ebp |
2288 | clevermous | 1575 | .l2: |
1576 | add edi, 0x20 |
||
1577 | cmp edi, ebx |
||
1578 | jb .l1 |
||
1579 | pop eax |
||
1580 | inc eax |
||
1581 | dec dword [esp+4] |
||
1582 | jnz .new_sector |
||
2643 | clevermous | 1583 | mov eax, [ebp+FAT.cluster_tmp] |
2288 | clevermous | 1584 | test eax, eax |
1585 | jz .done |
||
1586 | call get_FAT |
||
2643 | clevermous | 1587 | jc .notfound2 |
2288 | clevermous | 1588 | cmp eax, 2 |
1589 | jb .done |
||
2643 | clevermous | 1590 | cmp eax, [ebp+FAT.fatRESERVED] |
2288 | clevermous | 1591 | jae .done |
1592 | push eax |
||
2643 | clevermous | 1593 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 1594 | mov [esp+8], eax |
1595 | pop eax |
||
1596 | pop ebx |
||
1597 | add esp, 4 |
||
1598 | jmp .new_cluster |
||
6867 | pathoswith | 1599 | |
2288 | clevermous | 1600 | .notfound2: |
1601 | add esp, 8 |
||
1602 | .notfound: |
||
6867 | pathoswith | 1603 | add esp, 262*2+8 |
1604 | push ERROR_DEVICE |
||
1605 | jmp @f |
||
1606 | |||
2288 | clevermous | 1607 | .done: |
6867 | pathoswith | 1608 | add esp, 262*2+16 |
1609 | pushd 0 |
||
2288 | clevermous | 1610 | dec ecx |
1611 | js @f |
||
6867 | pathoswith | 1612 | mov byte [esp], ERROR_END_OF_FILE |
2288 | clevermous | 1613 | @@: |
6867 | pathoswith | 1614 | mov ebx, [edx+4] |
1615 | .ret: |
||
2643 | clevermous | 1616 | call fat_unlock |
1617 | pop eax |
||
2288 | clevermous | 1618 | ret |
1619 | |||
6867 | pathoswith | 1620 | .error: |
1621 | push eax |
||
1622 | xor ebx, ebx |
||
1623 | jmp .ret |
||
1624 | |||
1625 | .accessDenied: |
||
1626 | push ERROR_ACCESS_DENIED |
||
1627 | xor ebx, ebx |
||
1628 | jmp .ret |
||
1629 | |||
4273 | clevermous | 1630 | fat1x_root_next: |
2643 | clevermous | 1631 | push ecx |
1632 | lea ecx, [ebp+FAT.buffer+0x200-0x20] |
||
1633 | cmp edi, ecx |
||
4273 | clevermous | 1634 | jae fat1x_root_next_sector |
6867 | pathoswith | 1635 | add edi, 0x20 |
1636 | @@: |
||
2643 | clevermous | 1637 | pop ecx |
6867 | pathoswith | 1638 | ret |
1639 | |||
1640 | fat1x_root_next_write: |
||
1641 | push ecx |
||
1642 | lea ecx, [ebp+FAT.buffer+0x200] |
||
1643 | cmp edi, ecx |
||
1644 | jc @b |
||
1645 | call fat1x_root_end_write |
||
4273 | clevermous | 1646 | fat1x_root_next_sector: |
2643 | clevermous | 1647 | push [ebp+FAT.longname_sec2] |
1648 | pop [ebp+FAT.longname_sec1] |
||
2288 | clevermous | 1649 | mov ecx, [eax+4] |
1650 | push ecx |
||
2643 | clevermous | 1651 | add ecx, [ebp+FAT.ROOT_START] |
1652 | mov [ebp+FAT.longname_sec2], ecx |
||
2288 | clevermous | 1653 | pop ecx |
1654 | inc ecx |
||
1655 | mov [eax+4], ecx |
||
2643 | clevermous | 1656 | cmp ecx, [ebp+FAT.ROOT_SECTORS] |
6867 | pathoswith | 1657 | jnc fat_notroot_next_err |
2288 | clevermous | 1658 | pop ecx |
4273 | clevermous | 1659 | fat1x_root_first: |
2288 | clevermous | 1660 | mov eax, [eax+4] |
2643 | clevermous | 1661 | add eax, [ebp+FAT.ROOT_START] |
2288 | clevermous | 1662 | push ebx |
2643 | clevermous | 1663 | lea edi, [ebp+FAT.buffer] |
2288 | clevermous | 1664 | mov ebx, edi |
2643 | clevermous | 1665 | call fs_read32_sys |
2288 | clevermous | 1666 | pop ebx |
2643 | clevermous | 1667 | test eax, eax |
6867 | pathoswith | 1668 | jz @f |
1669 | movi eax, ERROR_DEVICE |
||
2288 | clevermous | 1670 | stc |
6867 | pathoswith | 1671 | @@: |
2288 | clevermous | 1672 | ret |
6867 | pathoswith | 1673 | |
4273 | clevermous | 1674 | fat1x_root_begin_write: |
2288 | clevermous | 1675 | push edi eax |
4273 | clevermous | 1676 | call fat1x_root_first |
2288 | clevermous | 1677 | pop eax edi |
1678 | ret |
||
6867 | pathoswith | 1679 | |
4273 | clevermous | 1680 | fat1x_root_end_write: |
2288 | clevermous | 1681 | pusha |
1682 | mov eax, [eax+4] |
||
2643 | clevermous | 1683 | add eax, [ebp+FAT.ROOT_START] |
1684 | lea ebx, [ebp+FAT.buffer] |
||
1685 | call fs_write32_sys |
||
2288 | clevermous | 1686 | popa |
1687 | ret |
||
6867 | pathoswith | 1688 | |
1689 | fat_notroot_next: |
||
2643 | clevermous | 1690 | push ecx |
6867 | pathoswith | 1691 | lea ecx, [ebp+FAT.buffer+0x200-0x20] |
2643 | clevermous | 1692 | cmp edi, ecx |
6867 | pathoswith | 1693 | jae fat_notroot_next_sector |
1694 | add edi, 0x20 |
||
1695 | @@: |
||
2643 | clevermous | 1696 | pop ecx |
2288 | clevermous | 1697 | ret |
1698 | |||
6867 | pathoswith | 1699 | fat_notroot_next_write: |
2643 | clevermous | 1700 | push ecx |
6867 | pathoswith | 1701 | lea ecx, [ebp+FAT.buffer+0x200] |
2643 | clevermous | 1702 | cmp edi, ecx |
6867 | pathoswith | 1703 | jc @b |
1704 | push eax |
||
1705 | call fat_notroot_end_write |
||
1706 | pop eax |
||
2288 | clevermous | 1707 | fat_notroot_next_sector: |
2643 | clevermous | 1708 | push [ebp+FAT.longname_sec2] |
1709 | pop [ebp+FAT.longname_sec1] |
||
2288 | clevermous | 1710 | push eax |
1711 | call fat_get_sector |
||
2643 | clevermous | 1712 | mov [ebp+FAT.longname_sec2], eax |
2288 | clevermous | 1713 | pop eax |
1714 | mov ecx, [eax+4] |
||
1715 | inc ecx |
||
2643 | clevermous | 1716 | cmp ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 1717 | jae fat_notroot_next_cluster |
1718 | mov [eax+4], ecx |
||
1719 | jmp @f |
||
6867 | pathoswith | 1720 | |
1721 | fat_notroot_next_err: |
||
1722 | pop ecx |
||
1723 | movi eax, ERROR_FILE_NOT_FOUND |
||
1724 | fat1x_root_extend_dir: |
||
1725 | stc |
||
1726 | ret |
||
1727 | |||
2288 | clevermous | 1728 | fat_notroot_next_cluster: |
1729 | push eax |
||
1730 | mov eax, [eax] |
||
1731 | call get_FAT |
||
1732 | mov ecx, eax |
||
1733 | pop eax |
||
2643 | clevermous | 1734 | jc fat_notroot_first.deverr |
1735 | cmp ecx, 2 |
||
1736 | jb fat_notroot_next_err |
||
1737 | cmp ecx, [ebp+FAT.fatRESERVED] |
||
2288 | clevermous | 1738 | jae fat_notroot_next_err |
1739 | mov [eax], ecx |
||
1740 | and dword [eax+4], 0 |
||
1741 | @@: |
||
1742 | pop ecx |
||
1743 | fat_notroot_first: |
||
1744 | call fat_get_sector |
||
1745 | push ebx |
||
2643 | clevermous | 1746 | lea edi, [ebp+FAT.buffer] |
2288 | clevermous | 1747 | mov ebx, edi |
2643 | clevermous | 1748 | call fs_read32_sys |
2288 | clevermous | 1749 | pop ebx |
2643 | clevermous | 1750 | test eax, eax |
1751 | jz .ret ; CF=0 |
||
1752 | push ecx |
||
1753 | .deverr: |
||
1754 | pop ecx |
||
1755 | mov eax, ERROR_DEVICE |
||
1756 | stc |
||
1757 | .ret: |
||
1758 | ret |
||
6867 | pathoswith | 1759 | |
2288 | clevermous | 1760 | fat_notroot_begin_write: |
1761 | push eax edi |
||
1762 | call fat_notroot_first |
||
1763 | pop edi eax |
||
1764 | ret |
||
6867 | pathoswith | 1765 | |
2288 | clevermous | 1766 | fat_notroot_end_write: |
1767 | call fat_get_sector |
||
1768 | push ebx |
||
2643 | clevermous | 1769 | lea ebx, [ebp+FAT.buffer] |
1770 | call fs_write32_sys |
||
2288 | clevermous | 1771 | pop ebx |
1772 | ret |
||
6867 | pathoswith | 1773 | |
1774 | fat_notroot_extend_dir.writeerr: |
||
1775 | pop edx |
||
2288 | clevermous | 1776 | @@: |
1777 | pop eax |
||
6867 | pathoswith | 1778 | ret |
1779 | |||
2288 | clevermous | 1780 | fat_notroot_extend_dir: |
1781 | push eax |
||
1782 | call get_free_FAT |
||
6867 | pathoswith | 1783 | jc @b |
2288 | clevermous | 1784 | push edx |
2643 | clevermous | 1785 | mov edx, [ebp+FAT.fatEND] |
2288 | clevermous | 1786 | call set_FAT |
2643 | clevermous | 1787 | jc .writeerr |
2288 | clevermous | 1788 | mov edx, eax |
1789 | mov eax, [esp+4] |
||
1790 | mov eax, [eax] |
||
1791 | push edx |
||
1792 | call set_FAT |
||
1793 | pop edx |
||
6867 | pathoswith | 1794 | jc .writeerr |
2288 | clevermous | 1795 | push ecx |
1796 | or ecx, -1 |
||
1797 | call add_disk_free_space |
||
1798 | mov ecx, 512/4 |
||
2643 | clevermous | 1799 | lea edi, [ebp+FAT.buffer] |
2288 | clevermous | 1800 | push edi |
1801 | xor eax, eax |
||
1802 | rep stosd |
||
1803 | pop edi |
||
1804 | pop ecx |
||
1805 | mov eax, [esp+4] |
||
1806 | mov [eax], edx |
||
1807 | and dword [eax+4], 0 |
||
1808 | pop edx |
||
1809 | mov eax, [eax] |
||
1810 | dec eax |
||
1811 | dec eax |
||
1812 | push ebx ecx |
||
2643 | clevermous | 1813 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 1814 | imul eax, ecx |
2643 | clevermous | 1815 | add eax, [ebp+FAT.DATA_START] |
2288 | clevermous | 1816 | mov ebx, edi |
1817 | @@: |
||
2643 | clevermous | 1818 | push eax |
1819 | call fs_write32_sys |
||
1820 | pop eax |
||
2288 | clevermous | 1821 | inc eax |
1822 | loop @b |
||
1823 | pop ecx ebx eax |
||
1824 | clc |
||
1825 | ret |
||
1826 | |||
1827 | fat_get_sector: |
||
1828 | push ecx |
||
1829 | mov ecx, [eax] |
||
1830 | dec ecx |
||
1831 | dec ecx |
||
2643 | clevermous | 1832 | imul ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
1833 | add ecx, [ebp+FAT.DATA_START] |
||
2288 | clevermous | 1834 | add ecx, [eax+4] |
1835 | mov eax, ecx |
||
1836 | pop ecx |
||
1837 | ret |
||
1838 | |||
2643 | clevermous | 1839 | ;---------------------------------------------------------------- |
1840 | fat_CreateFolder: |
||
1841 | push 1 |
||
6468 | pathoswith | 1842 | jmp @f |
2643 | clevermous | 1843 | |
6468 | pathoswith | 1844 | fat_CreateFile: |
2643 | clevermous | 1845 | push 0 |
6468 | pathoswith | 1846 | @@: |
2643 | clevermous | 1847 | call fat_lock |
1848 | pop eax |
||
1849 | mov ecx, [ebx+12] |
||
1850 | mov edx, [ebx+16] |
||
2288 | clevermous | 1851 | pushad |
1852 | xor edi, edi |
||
1853 | push esi |
||
1854 | @@: |
||
1855 | lodsb |
||
1856 | test al, al |
||
1857 | jz @f |
||
1858 | cmp al, '/' |
||
1859 | jnz @b |
||
1860 | lea edi, [esi-1] |
||
1861 | jmp @b |
||
6468 | pathoswith | 1862 | |
2288 | clevermous | 1863 | @@: |
1864 | pop esi |
||
1865 | test edi, edi |
||
1866 | jnz .noroot |
||
2643 | clevermous | 1867 | mov edx, [ebp+FAT.ROOT_CLUSTER] |
1868 | cmp [ebp+FAT.fs_type], 32 |
||
2288 | clevermous | 1869 | jz .pushnotroot |
2643 | clevermous | 1870 | xor edx, edx |
1871 | push edx |
||
4273 | clevermous | 1872 | push fat1x_root_extend_dir |
1873 | push fat1x_root_end_write |
||
1874 | push fat1x_root_next_write |
||
1875 | push fat1x_root_begin_write |
||
2643 | clevermous | 1876 | push edx |
1877 | push edx |
||
4273 | clevermous | 1878 | push fat1x_root_first |
1879 | push fat1x_root_next |
||
2288 | clevermous | 1880 | jmp .common1 |
6468 | pathoswith | 1881 | |
6867 | pathoswith | 1882 | .retNotFound: |
1883 | movi eax, ERROR_FILE_NOT_FOUND |
||
1884 | jmp .ret1 |
||
1885 | |||
1886 | .noAccess: |
||
1887 | movi eax, ERROR_ACCESS_DENIED |
||
1888 | .ret1: |
||
1889 | mov [esp+28], eax |
||
1890 | call fat_unlock |
||
1891 | popad |
||
1892 | xor ebx, ebx |
||
1893 | ret |
||
1894 | |||
1895 | .full: |
||
1896 | movi eax, ERROR_DISK_FULL |
||
1897 | jmp .ret1 |
||
1898 | |||
2288 | clevermous | 1899 | .noroot: |
1900 | cmp byte [edi+1], 0 |
||
6867 | pathoswith | 1901 | jz .noAccess |
2288 | clevermous | 1902 | ; check existence |
1903 | mov byte [edi], 0 |
||
1904 | push edi |
||
6468 | pathoswith | 1905 | call hd_find_lfn |
2288 | clevermous | 1906 | pop esi |
1907 | mov byte [esi], '/' |
||
6867 | pathoswith | 1908 | jc .retNotFound |
2288 | clevermous | 1909 | inc esi |
6867 | pathoswith | 1910 | test byte [edi+11], 0x10 |
1911 | jz .noAccess ; file |
||
2643 | clevermous | 1912 | mov edx, [edi+20-2] |
6867 | pathoswith | 1913 | mov dx, [edi+26] |
1914 | movi eax, ERROR_FS_FAIL |
||
2643 | clevermous | 1915 | cmp edx, 2 |
2288 | clevermous | 1916 | jb .ret1 |
1917 | .pushnotroot: |
||
2643 | clevermous | 1918 | push edx |
2288 | clevermous | 1919 | push fat_notroot_extend_dir |
1920 | push fat_notroot_end_write |
||
1921 | push fat_notroot_next_write |
||
1922 | push fat_notroot_begin_write |
||
1923 | push 0 |
||
2643 | clevermous | 1924 | push edx |
2288 | clevermous | 1925 | push fat_notroot_first |
1926 | push fat_notroot_next |
||
1927 | .common1: |
||
1928 | call fat_find_lfn |
||
1929 | jc .notfound |
||
1930 | test byte [edi+11], 10h |
||
1931 | jz .exists_file |
||
6468 | pathoswith | 1932 | ; found directory |
2643 | clevermous | 1933 | add esp, 36 |
1934 | call fat_unlock |
||
2288 | clevermous | 1935 | popad |
1936 | test al, al |
||
1937 | mov eax, ERROR_ACCESS_DENIED |
||
1938 | jz @f |
||
1939 | mov al, 0 |
||
1940 | @@: |
||
1941 | xor ebx, ebx |
||
1942 | ret |
||
6468 | pathoswith | 1943 | |
2288 | clevermous | 1944 | .exists_file: |
2643 | clevermous | 1945 | cmp byte [esp+36+28], 0 |
2288 | clevermous | 1946 | jz @f |
2643 | clevermous | 1947 | add esp, 36 |
6867 | pathoswith | 1948 | jmp .noAccess |
6468 | pathoswith | 1949 | |
1950 | @@: ; delete FAT chain |
||
2288 | clevermous | 1951 | push edi |
1952 | xor eax, eax |
||
1953 | mov dword [edi+28], eax ; zero size |
||
1954 | xor ecx, ecx |
||
1955 | mov eax, [edi+20-2] |
||
1956 | mov ax, [edi+26] |
||
1957 | mov word [edi+20], cx |
||
1958 | mov word [edi+26], cx |
||
1959 | test eax, eax |
||
1960 | jz .done1 |
||
1961 | @@: |
||
2643 | clevermous | 1962 | cmp eax, [ebp+FAT.fatRESERVED] |
2288 | clevermous | 1963 | jae .done1 |
1964 | push edx |
||
1965 | xor edx, edx |
||
1966 | call set_FAT |
||
1967 | mov eax, edx |
||
1968 | pop edx |
||
2643 | clevermous | 1969 | jc .done1 |
2288 | clevermous | 1970 | inc ecx |
1971 | jmp @b |
||
6468 | pathoswith | 1972 | |
1973 | .short_name_found: |
||
1974 | pop ecx edi esi |
||
1975 | call fat_next_short_name |
||
1976 | jnc .test_short_name_loop |
||
1977 | .disk_full: |
||
1978 | add esp, 12+36 |
||
6867 | pathoswith | 1979 | jmp .full |
6468 | pathoswith | 1980 | |
1981 | .notfound: ; generate short name |
||
2288 | clevermous | 1982 | call fat_name_is_legal |
1983 | jc @f |
||
2643 | clevermous | 1984 | add esp, 36 |
6867 | pathoswith | 1985 | jmp .retNotFound |
6468 | pathoswith | 1986 | |
2288 | clevermous | 1987 | @@: |
1988 | sub esp, 12 |
||
1989 | mov edi, esp |
||
1990 | call fat_gen_short_name |
||
1991 | .test_short_name_loop: |
||
1992 | push esi edi ecx |
||
1993 | mov esi, edi |
||
1994 | lea eax, [esp+12+12+8] |
||
2643 | clevermous | 1995 | mov edx, [eax+24] |
1996 | mov [eax], edx |
||
2288 | clevermous | 1997 | and dword [eax+4], 0 |
1998 | call dword [eax-4] |
||
1999 | jc .found |
||
2000 | .test_short_name_entry: |
||
2001 | cmp byte [edi+11], 0xF |
||
2002 | jz .test_short_name_cont |
||
2003 | mov ecx, 11 |
||
2004 | push esi edi |
||
2005 | repz cmpsb |
||
2006 | pop edi esi |
||
2007 | jz .short_name_found |
||
2008 | .test_short_name_cont: |
||
2009 | lea eax, [esp+12+12+8] |
||
2010 | call dword [eax-8] |
||
2011 | jnc .test_short_name_entry |
||
2012 | .found: |
||
2013 | pop ecx edi esi |
||
2014 | ; now find space in directory |
||
2015 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
||
2016 | mov al, '~' |
||
2017 | push ecx edi |
||
2018 | mov ecx, 8 |
||
2019 | repnz scasb |
||
3598 | clevermous | 2020 | movi eax, 1 ; 1 entry |
2288 | clevermous | 2021 | jnz .notilde |
2022 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
||
6471 | pathoswith | 2023 | xor ecx, ecx |
2024 | push esi |
||
2288 | clevermous | 2025 | @@: |
6471 | pathoswith | 2026 | call utf8to16 |
2027 | inc ecx |
||
2028 | test ax, ax |
||
2029 | jnz @b |
||
2030 | pop esi |
||
2031 | mov eax, ecx |
||
2032 | add eax, 12+13-1 |
||
2288 | clevermous | 2033 | mov ecx, 13 |
2034 | cdq |
||
2035 | div ecx |
||
2036 | .notilde: |
||
2037 | push -1 |
||
2038 | push -1 |
||
2039 | push -1 |
||
2040 | ; find |
||
2041 | xor ecx, ecx |
||
2042 | push eax |
||
2043 | lea eax, [esp+16+8+12+8] |
||
2643 | clevermous | 2044 | mov edx, [eax+24] |
2045 | mov [eax], edx |
||
2288 | clevermous | 2046 | and dword [eax+4], 0 |
2047 | call dword [eax-4] |
||
2048 | pop eax |
||
2049 | jnc .scan_dir |
||
2050 | .fsfrfe3: |
||
2643 | clevermous | 2051 | add esp, 12+8+12+36 |
6867 | pathoswith | 2052 | movi eax, ERROR_DEVICE |
2053 | jmp .ret1 |
||
6468 | pathoswith | 2054 | |
2288 | clevermous | 2055 | .scan_dir: |
2056 | cmp byte [edi], 0 |
||
2057 | jz .free |
||
2058 | cmp byte [edi], 0xE5 |
||
2059 | jz .free |
||
2060 | xor ecx, ecx |
||
2061 | .scan_cont: |
||
2062 | push eax |
||
2063 | lea eax, [esp+16+8+12+8] |
||
2064 | call dword [eax-8] |
||
2643 | clevermous | 2065 | mov edx, eax |
2288 | clevermous | 2066 | pop eax |
2067 | jnc .scan_dir |
||
2643 | clevermous | 2068 | cmp edx, ERROR_DEVICE |
2069 | jz .fsfrfe3 |
||
2288 | clevermous | 2070 | push eax |
2071 | lea eax, [esp+16+8+12+8] |
||
2072 | call dword [eax+20] ; extend directory |
||
2073 | pop eax |
||
2074 | jnc .scan_dir |
||
2643 | clevermous | 2075 | add esp, 12+8+12+36 |
6867 | pathoswith | 2076 | jmp .full |
6468 | pathoswith | 2077 | |
2288 | clevermous | 2078 | .free: |
2079 | test ecx, ecx |
||
2080 | jnz @f |
||
2081 | mov [esp], edi |
||
2082 | mov ecx, [esp+12+8+12+8] |
||
2083 | mov [esp+4], ecx |
||
2084 | mov ecx, [esp+12+8+12+12] |
||
2085 | mov [esp+8], ecx |
||
2086 | xor ecx, ecx |
||
2087 | @@: |
||
2088 | inc ecx |
||
2089 | cmp ecx, eax |
||
2090 | jb .scan_cont |
||
2091 | ; found! |
||
2643 | clevermous | 2092 | push esi ecx |
2093 | ; If creating a directory, allocate one data cluster now and fail immediately |
||
2094 | ; if this is impossible. This prevents from creating an invalid directory entry |
||
2095 | ; on a full disk. |
||
2096 | ; yup, the argument is quite non-intuitive... but what should I do if |
||
2097 | ; the entire function uses such arguments? BTW, it refers to al from pushad, |
||
6468 | pathoswith | 2098 | ; which in turn is filled with 0 in fat_CreateFile and 1 in fat_CreateFolder. |
2643 | clevermous | 2099 | cmp byte [esp+8+12+8+12+36+28], 0 |
2100 | jz .no.preallocate.folder.data |
||
2101 | call get_free_FAT |
||
2102 | jnc @f |
||
2103 | add esp, 8+12+8 |
||
2104 | jmp .disk_full |
||
6468 | pathoswith | 2105 | |
2643 | clevermous | 2106 | @@: |
6471 | pathoswith | 2107 | mov [esp+8+12+8+12+36+20], eax ; store the cluster somewhere |
6468 | pathoswith | 2108 | .no.preallocate.folder.data: ; calculate name checksum |
2288 | clevermous | 2109 | mov esi, [esp+8+12] |
2110 | mov ecx, 11 |
||
2111 | xor eax, eax |
||
2112 | @@: |
||
2113 | ror al, 1 |
||
2114 | add al, [esi] |
||
2115 | inc esi |
||
2116 | loop @b |
||
6471 | pathoswith | 2117 | pop ecx esi edi |
2288 | clevermous | 2118 | pop dword [esp+8+12+12] |
2119 | pop dword [esp+8+12+12] |
||
2120 | ; edi points to first entry in free chunk |
||
2121 | dec ecx |
||
2122 | jz .nolfn |
||
6471 | pathoswith | 2123 | push esi eax |
2288 | clevermous | 2124 | lea eax, [esp+8+8+12+8] |
6471 | pathoswith | 2125 | call dword [eax+8] ; begin write |
2288 | clevermous | 2126 | mov al, 40h |
2127 | .writelfn: |
||
2128 | or al, cl |
||
6471 | pathoswith | 2129 | stosb |
2288 | clevermous | 2130 | mov esi, [esp+4] |
2131 | push ecx |
||
2132 | dec ecx |
||
6471 | pathoswith | 2133 | jz @f |
2288 | clevermous | 2134 | imul ecx, 13 |
6471 | pathoswith | 2135 | .scroll: |
2136 | call utf8to16 |
||
2137 | loop .scroll |
||
2138 | @@: |
||
2288 | clevermous | 2139 | mov cl, 5 |
4273 | clevermous | 2140 | call fat_read_symbols |
2288 | clevermous | 2141 | mov ax, 0xF |
2142 | stosw |
||
2143 | mov al, [esp+4] |
||
2144 | stosb |
||
2145 | mov cl, 6 |
||
4273 | clevermous | 2146 | call fat_read_symbols |
2288 | clevermous | 2147 | xor eax, eax |
2148 | stosw |
||
2149 | mov cl, 2 |
||
4273 | clevermous | 2150 | call fat_read_symbols |
2288 | clevermous | 2151 | pop ecx |
2152 | lea eax, [esp+8+8+12+8] |
||
6471 | pathoswith | 2153 | call dword [eax+12] ; next write |
2288 | clevermous | 2154 | xor eax, eax |
2155 | loop .writelfn |
||
6471 | pathoswith | 2156 | pop eax esi |
2288 | clevermous | 2157 | .nolfn: |
2158 | xchg esi, [esp] |
||
2159 | mov ecx, 11 |
||
2160 | rep movsb |
||
2161 | mov word [edi], 20h ; attributes |
||
2162 | sub edi, 11 |
||
2163 | pop esi ecx |
||
2164 | add esp, 12 |
||
2165 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
||
2166 | call get_time_for_file |
||
2167 | mov [edi+14], ax ; creation time |
||
2168 | mov [edi+22], ax ; last write time |
||
2169 | call get_date_for_file |
||
2170 | mov [edi+16], ax ; creation date |
||
2171 | mov [edi+24], ax ; last write date |
||
2172 | mov [edi+18], ax ; last access date |
||
2173 | xor ecx, ecx |
||
2174 | mov word [edi+20], cx ; high word of cluster |
||
2175 | mov word [edi+26], cx ; low word of cluster - to be filled |
||
2176 | mov dword [edi+28], ecx ; file size - to be filled |
||
2643 | clevermous | 2177 | cmp byte [esp+36+28], cl |
2288 | clevermous | 2178 | jz .doit |
2179 | ; create directory |
||
2180 | mov byte [edi+11], 10h ; attributes: folder |
||
2643 | clevermous | 2181 | mov esi, edi |
2288 | clevermous | 2182 | lea eax, [esp+8] |
2183 | call dword [eax+16] ; flush directory |
||
2643 | clevermous | 2184 | mov eax, [esp+36+20] ; extract saved cluster |
2185 | mov [esp+36+20], edi ; this is needed for calculating arg of add_disk_free_space! |
||
2288 | clevermous | 2186 | push ecx |
2643 | clevermous | 2187 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 2188 | shl ecx, 9 |
2643 | clevermous | 2189 | push ecx |
2190 | push edi |
||
2288 | clevermous | 2191 | jmp .doit2 |
6468 | pathoswith | 2192 | |
2193 | .done1: |
||
2194 | pop edi |
||
2195 | call get_time_for_file |
||
2196 | mov [edi+22], ax |
||
2197 | call get_date_for_file |
||
2198 | mov [edi+24], ax |
||
2199 | mov [edi+18], ax |
||
2200 | or byte [edi+11], 20h ; set 'archive' attribute |
||
2288 | clevermous | 2201 | .doit: |
2643 | clevermous | 2202 | mov esi, [esp+36+20] |
2288 | clevermous | 2203 | lea eax, [esp+8] |
2204 | call dword [eax+16] ; flush directory |
||
2205 | push ecx |
||
2643 | clevermous | 2206 | mov ecx, [esp+4+36+24] |
2288 | clevermous | 2207 | push ecx |
2208 | push edi |
||
2209 | test ecx, ecx |
||
2210 | jz .done |
||
2211 | call get_free_FAT |
||
2212 | jc .diskfull |
||
2643 | clevermous | 2213 | .doit2: |
2288 | clevermous | 2214 | push eax |
2215 | mov [edi+26], ax |
||
2216 | shr eax, 16 |
||
2217 | mov [edi+20], ax |
||
2218 | lea eax, [esp+16+8] |
||
2219 | call dword [eax+16] ; flush directory |
||
2220 | pop eax |
||
2221 | push edx |
||
2643 | clevermous | 2222 | mov edx, [ebp+FAT.fatEND] |
2288 | clevermous | 2223 | call set_FAT |
2224 | pop edx |
||
2225 | .write_cluster: |
||
2226 | push eax |
||
2227 | dec eax |
||
2228 | dec eax |
||
2643 | clevermous | 2229 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2230 | add eax, [ebp+FAT.DATA_START] |
||
2231 | push [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2288 | clevermous | 2232 | .write_sector: |
2643 | clevermous | 2233 | cmp byte [esp+20+36+28], 0 |
2288 | clevermous | 2234 | jnz .writedir |
2235 | mov ecx, 512 |
||
2643 | clevermous | 2236 | cmp dword [esp+12], ecx |
2288 | clevermous | 2237 | jb .writeshort |
2238 | ; we can write directly from given buffer |
||
2239 | mov ebx, esi |
||
2240 | add esi, ecx |
||
2241 | jmp .writecommon |
||
6468 | pathoswith | 2242 | |
6867 | pathoswith | 2243 | .writedir: |
2244 | push 512 |
||
2245 | lea edi, [ebp+FAT.buffer] |
||
2246 | mov ebx, edi |
||
2247 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2248 | shl ecx, 9 |
||
2249 | cmp ecx, [esp+16] |
||
2250 | jnz .writedircont |
||
2251 | dec dword [esp+20] |
||
2252 | push esi |
||
2253 | mov ecx, 32/4 |
||
2254 | rep movsd |
||
2255 | pop esi |
||
2256 | mov dword [edi-32], '. ' |
||
2257 | mov dword [edi-32+4], ' ' |
||
2258 | mov dword [edi-32+8], ' ' |
||
2259 | mov byte [edi-32+11], 10h |
||
2260 | push esi |
||
2261 | mov ecx, 32/4 |
||
2262 | rep movsd |
||
2263 | pop esi |
||
2264 | mov dword [edi-32], '.. ' |
||
2265 | mov dword [edi-32+4], ' ' |
||
2266 | mov dword [edi-32+8], ' ' |
||
2267 | mov byte [edi-32+11], 10h |
||
2268 | mov ecx, [esp+20+36] |
||
2269 | cmp ecx, [ebp+FAT.ROOT_CLUSTER] |
||
2270 | jnz @f |
||
2271 | xor ecx, ecx |
||
2272 | @@: |
||
2273 | mov word [edi-32+26], cx |
||
2274 | shr ecx, 16 |
||
2275 | mov [edi-32+20], cx |
||
2276 | jmp .writedircont |
||
2277 | |||
2288 | clevermous | 2278 | .writeshort: |
2643 | clevermous | 2279 | mov ecx, [esp+12] |
2288 | clevermous | 2280 | push ecx |
2643 | clevermous | 2281 | lea edi, [ebp+FAT.buffer] |
2288 | clevermous | 2282 | mov ebx, edi |
2283 | rep movsb |
||
2284 | .writedircont: |
||
2643 | clevermous | 2285 | lea ecx, [ebp+FAT.buffer+0x200] |
2288 | clevermous | 2286 | sub ecx, edi |
2287 | push eax |
||
2288 | xor eax, eax |
||
2289 | rep stosb |
||
2290 | pop eax |
||
2291 | pop ecx |
||
2292 | .writecommon: |
||
2643 | clevermous | 2293 | push eax |
2294 | call fs_write32_app |
||
2295 | test eax, eax |
||
2296 | pop eax |
||
2288 | clevermous | 2297 | jnz .writeerr |
2298 | inc eax |
||
2643 | clevermous | 2299 | sub dword [esp+12], ecx |
2288 | clevermous | 2300 | jz .writedone |
2643 | clevermous | 2301 | dec dword [esp] |
2288 | clevermous | 2302 | jnz .write_sector |
2643 | clevermous | 2303 | pop eax |
2288 | clevermous | 2304 | ; allocate new cluster |
2305 | pop eax |
||
2306 | mov ecx, eax |
||
2307 | call get_free_FAT |
||
2308 | jc .diskfull |
||
2309 | push edx |
||
2643 | clevermous | 2310 | mov edx, [ebp+FAT.fatEND] |
2288 | clevermous | 2311 | call set_FAT |
2312 | xchg eax, ecx |
||
2313 | mov edx, ecx |
||
2314 | call set_FAT |
||
2315 | pop edx |
||
2316 | xchg eax, ecx |
||
2317 | jmp .write_cluster |
||
6468 | pathoswith | 2318 | |
2288 | clevermous | 2319 | .diskfull: |
2320 | mov eax, ERROR_DISK_FULL |
||
2321 | jmp .ret |
||
6468 | pathoswith | 2322 | |
2288 | clevermous | 2323 | .writeerr: |
2643 | clevermous | 2324 | pop eax eax |
2288 | clevermous | 2325 | sub esi, ecx |
2643 | clevermous | 2326 | mov eax, ERROR_DEVICE |
2288 | clevermous | 2327 | jmp .ret |
6468 | pathoswith | 2328 | |
2288 | clevermous | 2329 | .writedone: |
2643 | clevermous | 2330 | pop eax eax |
2288 | clevermous | 2331 | .done: |
2332 | xor eax, eax |
||
2333 | .ret: |
||
2334 | pop edi ecx |
||
2643 | clevermous | 2335 | sub esi, [esp+4+36+20] |
2336 | mov [esp+4+36+28], eax |
||
2337 | mov [esp+4+36+16], esi |
||
2338 | lea eax, [esp+12] |
||
2288 | clevermous | 2339 | call dword [eax+8] |
2643 | clevermous | 2340 | mov [edi+28], esi |
2288 | clevermous | 2341 | call dword [eax+16] |
2643 | clevermous | 2342 | mov [esp+36+16], ebx |
2343 | lea eax, [esi+511] |
||
2288 | clevermous | 2344 | shr eax, 9 |
2643 | clevermous | 2345 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 2346 | lea eax, [eax+ecx-1] |
2347 | xor edx, edx |
||
2348 | div ecx |
||
2643 | clevermous | 2349 | pop ecx |
2288 | clevermous | 2350 | sub ecx, eax |
2351 | call add_disk_free_space |
||
2643 | clevermous | 2352 | add esp, 36 |
2288 | clevermous | 2353 | call update_disk |
2643 | clevermous | 2354 | call fat_unlock |
2288 | clevermous | 2355 | popad |
2356 | ret |
||
6468 | pathoswith | 2357 | |
2288 | clevermous | 2358 | @@: |
6471 | pathoswith | 2359 | or eax, -1 |
2360 | rep stosw |
||
4273 | clevermous | 2361 | ret |
2362 | |||
2363 | fat_read_symbols: |
||
6471 | pathoswith | 2364 | test esi, esi |
2365 | jz @b |
||
2366 | call utf8to16 |
||
4273 | clevermous | 2367 | stosw |
6471 | pathoswith | 2368 | test ax, ax |
2369 | jnz @f |
||
2370 | xor esi, esi |
||
2371 | @@: |
||
4273 | clevermous | 2372 | loop fat_read_symbols |
2373 | ret |
||
2374 | |||
2643 | clevermous | 2375 | ;---------------------------------------------------------------- |
2376 | fat_Write: |
||
2377 | call fat_lock |
||
6468 | pathoswith | 2378 | call hd_find_lfn |
6845 | pathoswith | 2379 | jc .error |
2643 | clevermous | 2380 | cmp dword [ebx+8], 0 |
6845 | pathoswith | 2381 | jnz .eof ; FAT does not support files larger than 4GB |
2643 | clevermous | 2382 | mov ecx, [ebx+12] |
2383 | mov edx, [ebx+16] |
||
2384 | mov ebx, [ebx+4] |
||
2288 | clevermous | 2385 | ; now edi points to direntry, ebx=start byte to write, |
2386 | ; ecx=number of bytes to write, edx=data pointer |
||
2387 | ; extend file if needed |
||
2388 | add ecx, ebx |
||
2389 | jc .eof ; FAT does not support files larger than 4GB |
||
2643 | clevermous | 2390 | push edx |
2288 | clevermous | 2391 | push eax ; save directory sector |
2392 | push 0 ; return value=0 |
||
2393 | call get_time_for_file |
||
2394 | mov [edi+22], ax ; last write time |
||
2395 | call get_date_for_file |
||
2396 | mov [edi+24], ax ; last write date |
||
2397 | mov [edi+18], ax ; last access date |
||
2398 | push dword [edi+28] ; save current file size |
||
2399 | cmp ecx, [edi+28] |
||
2400 | jbe .length_ok |
||
2401 | cmp ecx, ebx |
||
2402 | jz .length_ok |
||
2403 | call hd_extend_file |
||
2404 | jnc .length_ok |
||
2405 | mov [esp+4], eax |
||
2406 | ; hd_extend_file can return three error codes: FAT table error, device error or disk full. |
||
2407 | ; First two cases are fatal errors, in third case we may write some data |
||
2408 | cmp al, ERROR_DISK_FULL |
||
6845 | pathoswith | 2409 | jnz @f |
2288 | clevermous | 2410 | ; correct number of bytes to write |
2411 | mov ecx, [edi+28] |
||
2412 | cmp ecx, ebx |
||
2413 | ja .length_ok |
||
2643 | clevermous | 2414 | push 0 |
2288 | clevermous | 2415 | .ret: |
2643 | clevermous | 2416 | pop eax |
2417 | sub edx, [esp+12] |
||
2418 | mov ebx, edx ; ebx=number of written bytes |
||
2288 | clevermous | 2419 | call update_disk |
2643 | clevermous | 2420 | test eax, eax |
2288 | clevermous | 2421 | jz @f |
2643 | clevermous | 2422 | mov byte [esp+4], ERROR_DEVICE |
2288 | clevermous | 2423 | @@: |
6845 | pathoswith | 2424 | pop eax eax ecx edx |
2425 | .error: |
||
2426 | push eax |
||
2427 | @@: |
||
2643 | clevermous | 2428 | call fat_unlock |
6867 | pathoswith | 2429 | pop eax |
6845 | pathoswith | 2430 | ret |
2431 | |||
2432 | .eof: |
||
2433 | push ERROR_END_OF_FILE |
||
6846 | pathoswith | 2434 | xor ebx, ebx |
6845 | pathoswith | 2435 | jmp @b |
2436 | |||
2437 | .device_err2: |
||
2643 | clevermous | 2438 | pop ecx |
6845 | pathoswith | 2439 | .device_err: |
2440 | mov byte [esp+8], ERROR_DEVICE |
||
2441 | jmp .ret |
||
2442 | |||
2443 | .fat_err: |
||
2444 | mov byte [esp+8], ERROR_FS_FAIL |
||
2445 | jmp .ret |
||
2446 | |||
2288 | clevermous | 2447 | .length_ok: |
2448 | mov esi, [edi+28] |
||
2449 | mov eax, [edi+20-2] |
||
2450 | mov ax, [edi+26] |
||
2451 | mov edi, eax ; edi=current cluster |
||
2643 | clevermous | 2452 | push 0 ; current sector in cluster |
2288 | clevermous | 2453 | ; save directory |
2643 | clevermous | 2454 | mov eax, [esp+12] |
2288 | clevermous | 2455 | push ebx |
2643 | clevermous | 2456 | lea ebx, [ebp+FAT.buffer] |
2457 | call fs_write32_sys |
||
2288 | clevermous | 2458 | pop ebx |
2643 | clevermous | 2459 | test eax, eax |
6845 | pathoswith | 2460 | jnz .device_err |
2288 | clevermous | 2461 | ; now ebx=start pos, ecx=end pos, both lie inside file |
2462 | sub ecx, ebx |
||
2463 | jz .ret |
||
2464 | .write_loop: |
||
2465 | ; skip unmodified sectors |
||
2643 | clevermous | 2466 | cmp dword [esp+4], 0x200 |
2288 | clevermous | 2467 | jb .modify |
2468 | sub ebx, 0x200 |
||
2469 | jae .skip |
||
2470 | add ebx, 0x200 |
||
2471 | .modify: |
||
2472 | ; get length of data in current sector |
||
2473 | push ecx |
||
2474 | sub ebx, 0x200 |
||
2475 | jb .hasdata |
||
2476 | neg ebx |
||
2477 | xor ecx, ecx |
||
2478 | jmp @f |
||
2479 | .hasdata: |
||
2480 | neg ebx |
||
2481 | cmp ecx, ebx |
||
2482 | jbe @f |
||
2483 | mov ecx, ebx |
||
2484 | @@: |
||
2485 | ; get current sector number |
||
2486 | mov eax, edi |
||
2487 | dec eax |
||
2488 | dec eax |
||
2643 | clevermous | 2489 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2490 | add eax, [ebp+FAT.DATA_START] |
||
2491 | add eax, [esp+4] |
||
2288 | clevermous | 2492 | ; load sector if needed |
2643 | clevermous | 2493 | cmp dword [esp+8], 0 ; we don't need to read uninitialized data |
2288 | clevermous | 2494 | jz .noread |
2495 | cmp ecx, 0x200 ; we don't need to read sector if it is fully rewritten |
||
2496 | jz .noread |
||
2497 | cmp ecx, esi ; (same for the last sector) |
||
2498 | jz .noread |
||
2643 | clevermous | 2499 | push eax ebx |
2500 | lea ebx, [ebp+FAT.buffer] |
||
2501 | call fs_read32_app |
||
2502 | test eax, eax |
||
2503 | pop ebx eax |
||
6845 | pathoswith | 2504 | jnz .device_err2 |
2288 | clevermous | 2505 | .noread: |
2506 | ; zero uninitialized data if file was extended (because hd_extend_file does not this) |
||
2507 | push eax ecx edi |
||
2508 | xor eax, eax |
||
2509 | mov ecx, 0x200 |
||
2643 | clevermous | 2510 | sub ecx, [esp+8+12] |
2288 | clevermous | 2511 | jbe @f |
2643 | clevermous | 2512 | lea edi, [ebp+FAT.buffer] |
2513 | add edi, [esp+8+12] |
||
2288 | clevermous | 2514 | rep stosb |
2515 | @@: |
||
2516 | ; zero uninitialized data in the last sector |
||
2517 | mov ecx, 0x200 |
||
2518 | sub ecx, esi |
||
2519 | jbe @f |
||
2643 | clevermous | 2520 | lea edi, [ebp+FAT.buffer+esi] |
2288 | clevermous | 2521 | rep stosb |
2522 | @@: |
||
2523 | pop edi ecx |
||
2524 | ; copy new data |
||
2525 | mov eax, edx |
||
2526 | neg ebx |
||
2527 | jecxz @f |
||
2643 | clevermous | 2528 | lea ebx, [ebp+FAT.buffer+0x200+ebx] |
2288 | clevermous | 2529 | call memmove |
2530 | xor ebx, ebx |
||
2531 | @@: |
||
2532 | pop eax |
||
2533 | ; save sector |
||
2534 | push ebx |
||
2643 | clevermous | 2535 | lea ebx, [ebp+FAT.buffer] |
2536 | call fs_write32_app |
||
2288 | clevermous | 2537 | pop ebx |
2643 | clevermous | 2538 | test eax, eax |
2288 | clevermous | 2539 | jnz .device_err2 |
2540 | add edx, ecx |
||
2541 | sub [esp], ecx |
||
2542 | pop ecx |
||
2543 | jz .ret |
||
2544 | .skip: |
||
2545 | ; next sector |
||
2643 | clevermous | 2546 | pop eax |
2547 | inc eax |
||
2548 | push eax |
||
2549 | cmp eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2288 | clevermous | 2550 | jb @f |
2643 | clevermous | 2551 | and dword [esp], 0 |
2288 | clevermous | 2552 | mov eax, edi |
2553 | call get_FAT |
||
2554 | mov edi, eax |
||
2643 | clevermous | 2555 | jc .device_err |
2556 | cmp edi, 2 |
||
2557 | jb .fat_err |
||
2558 | cmp edi, [ebp+FAT.fatRESERVED] |
||
2559 | jae .fat_err |
||
2288 | clevermous | 2560 | @@: |
2561 | sub esi, 0x200 |
||
2562 | jae @f |
||
2563 | xor esi, esi |
||
2564 | @@: |
||
2643 | clevermous | 2565 | sub dword [esp+4], 0x200 |
2288 | clevermous | 2566 | jae @f |
2643 | clevermous | 2567 | and dword [esp+4], 0 |
2288 | clevermous | 2568 | @@: |
2569 | jmp .write_loop |
||
2570 | |||
2571 | hd_extend_file.zero_size: |
||
2572 | xor eax, eax |
||
2573 | jmp hd_extend_file.start_extend |
||
2574 | |||
2575 | ; extends file on hd to given size (new data area is undefined) |
||
2576 | ; in: edi->direntry, ecx=new size |
||
2577 | ; out: CF=0 => OK, eax=0 |
||
6468 | pathoswith | 2578 | ; CF=1 => error, eax=code (ERROR_FS_FAIL or ERROR_DISK_FULL or ERROR_DEVICE) |
2288 | clevermous | 2579 | hd_extend_file: |
2643 | clevermous | 2580 | push esi |
2581 | mov esi, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2582 | imul esi, [ebp+FAT.BYTES_PER_SECTOR] |
||
2288 | clevermous | 2583 | push ecx |
2584 | ; find the last cluster of file |
||
2585 | mov eax, [edi+20-2] |
||
2586 | mov ax, [edi+26] |
||
2587 | mov ecx, [edi+28] |
||
2588 | jecxz .zero_size |
||
2589 | .last_loop: |
||
2643 | clevermous | 2590 | sub ecx, esi |
2288 | clevermous | 2591 | jbe .last_found |
2592 | call get_FAT |
||
2643 | clevermous | 2593 | jnc @f |
2288 | clevermous | 2594 | .device_err: |
2595 | pop ecx |
||
2596 | .device_err2: |
||
2643 | clevermous | 2597 | pop esi |
2598 | push ERROR_DEVICE |
||
2288 | clevermous | 2599 | .ret_err: |
2600 | pop eax |
||
2601 | stc |
||
2602 | ret |
||
2603 | @@: |
||
2604 | cmp eax, 2 |
||
2605 | jb .fat_err |
||
2643 | clevermous | 2606 | cmp eax, [ebp+FAT.fatRESERVED] |
2288 | clevermous | 2607 | jb .last_loop |
2608 | .fat_err: |
||
2643 | clevermous | 2609 | pop ecx esi |
6468 | pathoswith | 2610 | push ERROR_FS_FAIL |
2288 | clevermous | 2611 | jmp .ret_err |
2612 | .last_found: |
||
2613 | push eax |
||
2614 | call get_FAT |
||
2643 | clevermous | 2615 | jnc @f |
2288 | clevermous | 2616 | pop eax |
2617 | jmp .device_err |
||
2618 | @@: |
||
2643 | clevermous | 2619 | cmp eax, [ebp+FAT.fatRESERVED] |
2288 | clevermous | 2620 | pop eax |
2621 | jb .fat_err |
||
2622 | ; set length to full number of clusters |
||
2623 | sub [edi+28], ecx |
||
2624 | .start_extend: |
||
2625 | pop ecx |
||
2626 | ; now do extend |
||
2627 | push edx |
||
2628 | mov edx, 2 ; start scan from cluster 2 |
||
2629 | .extend_loop: |
||
2630 | cmp [edi+28], ecx |
||
2631 | jae .extend_done |
||
2632 | ; add new cluster |
||
2633 | push eax |
||
2634 | call get_free_FAT |
||
2635 | jc .disk_full |
||
2643 | clevermous | 2636 | mov edx, [ebp+FAT.fatEND] |
2288 | clevermous | 2637 | call set_FAT |
2638 | mov edx, eax |
||
2639 | pop eax |
||
2640 | test eax, eax |
||
2641 | jz .first_cluster |
||
2642 | push edx |
||
2643 | call set_FAT |
||
2644 | pop edx |
||
2645 | jmp @f |
||
2646 | .first_cluster: |
||
2647 | ror edx, 16 |
||
2648 | mov [edi+20], dx |
||
2649 | ror edx, 16 |
||
2650 | mov [edi+26], dx |
||
2651 | @@: |
||
2652 | push ecx |
||
2653 | mov ecx, -1 |
||
2654 | call add_disk_free_space |
||
2655 | pop ecx |
||
2656 | mov eax, edx |
||
2643 | clevermous | 2657 | add [edi+28], esi |
2288 | clevermous | 2658 | jmp .extend_loop |
2659 | .extend_done: |
||
2660 | mov [edi+28], ecx |
||
2643 | clevermous | 2661 | pop edx esi |
2288 | clevermous | 2662 | xor eax, eax ; CF=0 |
2663 | ret |
||
2664 | .device_err3: |
||
2665 | pop edx |
||
2666 | jmp .device_err2 |
||
2667 | .disk_full: |
||
2643 | clevermous | 2668 | pop eax edx esi |
3598 | clevermous | 2669 | movi eax, ERROR_DISK_FULL |
2288 | clevermous | 2670 | stc |
2671 | ret |
||
2672 | |||
2673 | ;---------------------------------------------------------------- |
||
2643 | clevermous | 2674 | fat_SetFileEnd: |
2675 | call fat_lock |
||
6468 | pathoswith | 2676 | call hd_find_lfn |
6845 | pathoswith | 2677 | jc .reteax |
2288 | clevermous | 2678 | ; must not be directory |
2679 | test byte [edi+11], 10h |
||
2643 | clevermous | 2680 | jnz .access_denied |
2288 | clevermous | 2681 | ; file size must not exceed 4 Gb |
2643 | clevermous | 2682 | cmp dword [ebx+8], 0 |
6845 | pathoswith | 2683 | jnz .endOfFile |
2288 | clevermous | 2684 | push eax ; save directory sector |
2685 | ; set file modification date/time to current |
||
6867 | pathoswith | 2686 | call get_time_for_file |
2687 | mov [edi+22], ax ; last write |
||
2688 | call get_date_for_file |
||
2689 | mov [edi+24], ax ; last write |
||
2690 | mov [edi+18], ax ; last access |
||
2643 | clevermous | 2691 | mov eax, [ebx+4] |
2288 | clevermous | 2692 | cmp eax, [edi+28] |
2693 | jb .truncate |
||
2694 | ja .expand |
||
2695 | pop eax |
||
2643 | clevermous | 2696 | lea ebx, [ebp+FAT.buffer] |
2697 | call fs_write32_sys |
||
2698 | test eax, eax |
||
6845 | pathoswith | 2699 | jnz .errorDevice |
2700 | push 0 |
||
2701 | jmp .ret |
||
2702 | |||
2703 | .access_denied: |
||
2704 | push ERROR_ACCESS_DENIED |
||
2705 | jmp .ret |
||
2706 | |||
2707 | .endOfFile: |
||
2708 | push ERROR_END_OF_FILE |
||
2709 | jmp .ret |
||
2710 | |||
2711 | .errorDevice: |
||
2643 | clevermous | 2712 | push ERROR_DEVICE |
2713 | jmp .ret |
||
6845 | pathoswith | 2714 | |
2288 | clevermous | 2715 | .expand: |
2716 | push ebx ebp ecx |
||
2717 | push dword [edi+28] ; save old size |
||
2718 | mov ecx, eax |
||
2719 | call hd_extend_file |
||
2720 | push eax ; return code |
||
2721 | jnc .expand_ok |
||
2722 | cmp al, ERROR_DISK_FULL |
||
6845 | pathoswith | 2723 | jnz .pop_ret |
2724 | .expand_ok: ; save directory |
||
2288 | clevermous | 2725 | mov eax, [edi+28] |
2726 | xchg eax, [esp+20] |
||
2643 | clevermous | 2727 | lea ebx, [ebp+FAT.buffer] |
2728 | call fs_write32_sys |
||
2729 | test eax, eax |
||
6850 | pathoswith | 2730 | jnz .pop_ret11 |
2731 | mov eax, [esp+20] |
||
2732 | sub eax, [esp+4] |
||
2733 | cmp eax, 1000001h |
||
2734 | jnc .pop_ret |
||
2288 | clevermous | 2735 | mov eax, [edi+20-2] |
2736 | mov ax, [edi+26] |
||
2737 | mov edi, eax |
||
2643 | clevermous | 2738 | test edi, edi |
2739 | jz .pop_ret |
||
2288 | clevermous | 2740 | ; now zero new data |
2643 | clevermous | 2741 | push 0 |
2742 | ; edi=current cluster, [esp]=sector in cluster |
||
2743 | ; [esp+24]=new size, [esp+8]=old size, [esp+4]=return code |
||
2288 | clevermous | 2744 | .zero_loop: |
2643 | clevermous | 2745 | cmp edi, 2 |
2746 | jb .error_fat |
||
2747 | cmp edi, [ebp+FAT.fatRESERVED] |
||
2748 | jae .error_fat |
||
2749 | sub dword [esp+8], 0x200 |
||
2288 | clevermous | 2750 | jae .next_cluster |
2751 | lea eax, [edi-2] |
||
2643 | clevermous | 2752 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2753 | add eax, [ebp+FAT.DATA_START] |
||
2754 | add eax, [esp] |
||
2755 | cmp dword [esp+8], -0x200 |
||
2288 | clevermous | 2756 | jz .noread |
2643 | clevermous | 2757 | push eax |
2758 | lea ebx, [ebp+FAT.buffer] |
||
2759 | call fs_read32_app |
||
2760 | test eax, eax |
||
2761 | pop eax |
||
2288 | clevermous | 2762 | jnz .err_next |
2763 | .noread: |
||
2643 | clevermous | 2764 | mov ecx, [esp+8] |
2288 | clevermous | 2765 | neg ecx |
2766 | push edi |
||
2643 | clevermous | 2767 | lea edi, [ebp+FAT.buffer+0x200] |
2768 | add edi, [esp+12] |
||
2288 | clevermous | 2769 | push eax |
2770 | xor eax, eax |
||
2643 | clevermous | 2771 | mov [esp+16], eax |
2288 | clevermous | 2772 | rep stosb |
2773 | pop eax |
||
2774 | pop edi |
||
2643 | clevermous | 2775 | call fs_write32_app |
2776 | test eax, eax |
||
2288 | clevermous | 2777 | jz .next_cluster |
2778 | .err_next: |
||
2643 | clevermous | 2779 | mov byte [esp+4], ERROR_DEVICE |
2288 | clevermous | 2780 | .next_cluster: |
2643 | clevermous | 2781 | pop eax |
2288 | clevermous | 2782 | sub dword [esp+20], 0x200 |
2783 | jbe .pop_ret |
||
2643 | clevermous | 2784 | inc eax |
2785 | push eax |
||
2786 | cmp eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2288 | clevermous | 2787 | jb .zero_loop |
2643 | clevermous | 2788 | and dword [esp], 0 |
2288 | clevermous | 2789 | mov eax, edi |
2790 | call get_FAT |
||
2791 | mov edi, eax |
||
2643 | clevermous | 2792 | jnc .zero_loop |
2793 | pop eax |
||
6845 | pathoswith | 2794 | .pop_ret11: |
2795 | mov byte [esp], ERROR_DEVICE |
||
2796 | .pop_ret: |
||
2797 | call update_disk |
||
2798 | pop eax ecx ecx ebp ebx ecx |
||
2799 | .reteax: |
||
2800 | push eax |
||
2801 | .ret: |
||
2802 | call fat_unlock |
||
6867 | pathoswith | 2803 | pop eax |
6845 | pathoswith | 2804 | ret |
2805 | |||
2806 | .error_fat: |
||
2807 | pop eax |
||
2808 | mov byte [esp], ERROR_FS_FAIL |
||
2809 | jmp .pop_ret |
||
2810 | |||
2811 | .error_fat2: |
||
2812 | pop eax ecx eax |
||
2813 | call update_disk |
||
2814 | push ERROR_FS_FAIL |
||
2815 | jmp .ret |
||
2816 | |||
2288 | clevermous | 2817 | .truncate: |
2818 | mov [edi+28], eax |
||
2819 | push ecx |
||
2820 | mov ecx, [edi+20-2] |
||
2821 | mov cx, [edi+26] |
||
2822 | push eax |
||
2823 | test eax, eax |
||
2824 | jz .zero_size |
||
6845 | pathoswith | 2825 | @@: ; find new last cluster |
2643 | clevermous | 2826 | cmp ecx, 2 |
2827 | jb .error_fat2 |
||
2828 | cmp ecx, [ebp+FAT.fatRESERVED] |
||
2829 | jae .error_fat2 |
||
2830 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2288 | clevermous | 2831 | shl eax, 9 |
2832 | sub [esp], eax |
||
2833 | jbe @f |
||
2834 | mov eax, ecx |
||
2835 | call get_FAT |
||
2836 | mov ecx, eax |
||
2643 | clevermous | 2837 | jnc @b |
2288 | clevermous | 2838 | .device_err3: |
6845 | pathoswith | 2839 | pop eax ecx eax |
2643 | clevermous | 2840 | call update_disk |
6845 | pathoswith | 2841 | push ERROR_DEVICE |
2842 | jmp .ret |
||
2843 | |||
2288 | clevermous | 2844 | @@: |
2845 | ; we will zero data at the end of last sector - remember it |
||
2846 | push ecx |
||
2847 | ; terminate FAT chain |
||
2848 | push edx |
||
2849 | mov eax, ecx |
||
2643 | clevermous | 2850 | mov edx, [ebp+FAT.fatEND] |
2288 | clevermous | 2851 | call set_FAT |
2852 | mov eax, edx |
||
2853 | pop edx |
||
2643 | clevermous | 2854 | jnc @f |
2288 | clevermous | 2855 | .device_err4: |
2856 | pop ecx |
||
2857 | jmp .device_err3 |
||
6845 | pathoswith | 2858 | |
2288 | clevermous | 2859 | .zero_size: |
2860 | and word [edi+20], 0 |
||
2861 | and word [edi+26], 0 |
||
2862 | push 0 |
||
2863 | mov eax, ecx |
||
2864 | @@: |
||
2865 | ; delete FAT chain |
||
2866 | call clear_cluster_chain |
||
2643 | clevermous | 2867 | jc .device_err4 |
2288 | clevermous | 2868 | ; save directory |
2869 | mov eax, [esp+12] |
||
2870 | push ebx |
||
2643 | clevermous | 2871 | lea ebx, [ebp+FAT.buffer] |
2872 | call fs_write32_sys |
||
2288 | clevermous | 2873 | pop ebx |
2643 | clevermous | 2874 | test eax, eax |
2288 | clevermous | 2875 | jnz .device_err4 |
2876 | ; zero last sector, ignore errors |
||
2877 | pop ecx |
||
2878 | pop eax |
||
2879 | dec ecx |
||
2643 | clevermous | 2880 | imul ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2881 | add ecx, [ebp+FAT.DATA_START] |
||
2288 | clevermous | 2882 | push eax |
2883 | sar eax, 9 |
||
2884 | add ecx, eax |
||
2885 | pop eax |
||
2886 | and eax, 0x1FF |
||
2887 | jz .truncate_done |
||
2888 | push ebx eax |
||
2889 | mov eax, ecx |
||
2643 | clevermous | 2890 | lea ebx, [ebp+FAT.buffer] |
2891 | call fs_read32_app |
||
2288 | clevermous | 2892 | pop eax |
2643 | clevermous | 2893 | lea edi, [ebp+FAT.buffer+eax] |
2288 | clevermous | 2894 | push ecx |
2895 | mov ecx, 0x200 |
||
2896 | sub ecx, eax |
||
2897 | xor eax, eax |
||
2898 | rep stosb |
||
2899 | pop eax |
||
2643 | clevermous | 2900 | call fs_write32_app |
2288 | clevermous | 2901 | pop ebx |
2902 | .truncate_done: |
||
6867 | pathoswith | 2903 | pop ecx eax |
2288 | clevermous | 2904 | call update_disk |
2643 | clevermous | 2905 | call fat_unlock |
2288 | clevermous | 2906 | xor eax, eax |
2907 | ret |
||
2908 | |||
2643 | clevermous | 2909 | ;---------------------------------------------------------------- |
2910 | fat_GetFileInfo: |
||
2288 | clevermous | 2911 | cmp byte [esi], 0 |
2912 | jnz @f |
||
2913 | mov eax, 2 |
||
2914 | ret |
||
2915 | @@: |
||
2643 | clevermous | 2916 | call fat_lock |
6468 | pathoswith | 2917 | call hd_find_lfn |
6867 | pathoswith | 2918 | jc @f |
2643 | clevermous | 2919 | push ebp |
2920 | xor ebp, ebp |
||
2921 | mov esi, [ebx+16] |
||
2922 | mov dword [esi+4], ebp |
||
2923 | call fat_entry_to_bdfe2 |
||
2924 | pop ebp |
||
2925 | xor eax, eax |
||
6867 | pathoswith | 2926 | @@: |
2643 | clevermous | 2927 | push eax |
2928 | call fat_unlock |
||
2929 | pop eax |
||
2930 | ret |
||
2288 | clevermous | 2931 | |
2643 | clevermous | 2932 | ;---------------------------------------------------------------- |
2933 | fat_SetFileInfo: |
||
2934 | call fat_lock |
||
6468 | pathoswith | 2935 | call hd_find_lfn |
6867 | pathoswith | 2936 | jc @f |
2288 | clevermous | 2937 | push eax |
2643 | clevermous | 2938 | mov edx, [ebx+16] |
2288 | clevermous | 2939 | call bdfe_to_fat_entry |
2940 | pop eax |
||
2643 | clevermous | 2941 | lea ebx, [ebp+FAT.buffer] |
2942 | call fs_write32_sys |
||
2288 | clevermous | 2943 | call update_disk |
2944 | xor eax, eax |
||
6867 | pathoswith | 2945 | @@: |
2643 | clevermous | 2946 | push eax |
2947 | call fat_unlock |
||
2948 | pop eax |
||
2949 | ret |
||
2288 | clevermous | 2950 | |
2951 | ;---------------------------------------------------------------- |
||
2643 | clevermous | 2952 | fat_Delete: |
2953 | call fat_lock |
||
2954 | and [ebp+FAT.longname_sec1], 0 |
||
2955 | and [ebp+FAT.longname_sec2], 0 |
||
6468 | pathoswith | 2956 | call hd_find_lfn |
6845 | pathoswith | 2957 | jc .notFound |
2288 | clevermous | 2958 | cmp dword [edi], '. ' |
2959 | jz .access_denied2 |
||
2960 | cmp dword [edi], '.. ' |
||
2961 | jz .access_denied2 |
||
2962 | test byte [edi+11], 10h |
||
2963 | jz .dodel |
||
2964 | ; we can delete only empty folders! |
||
2965 | pushad |
||
2643 | clevermous | 2966 | mov esi, [edi+20-2] |
2967 | mov si, [edi+26] |
||
2288 | clevermous | 2968 | xor ecx, ecx |
2643 | clevermous | 2969 | lea eax, [esi-2] |
2970 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2971 | add eax, [ebp+FAT.DATA_START] |
||
2972 | lea ebx, [ebp+FAT.buffer] |
||
2973 | call fs_read32_sys |
||
2974 | test eax, eax |
||
2288 | clevermous | 2975 | jnz .err1 |
2643 | clevermous | 2976 | lea eax, [ebx+0x200] |
2288 | clevermous | 2977 | add ebx, 2*0x20 |
2978 | .checkempty: |
||
2979 | cmp byte [ebx], 0 |
||
2980 | jz .empty |
||
2981 | cmp byte [ebx], 0xE5 |
||
2982 | jnz .notempty |
||
2983 | add ebx, 0x20 |
||
2643 | clevermous | 2984 | cmp ebx, eax |
2288 | clevermous | 2985 | jb .checkempty |
2986 | inc ecx |
||
2643 | clevermous | 2987 | cmp ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 2988 | jb @f |
2643 | clevermous | 2989 | mov eax, esi |
2288 | clevermous | 2990 | call get_FAT |
2643 | clevermous | 2991 | jc .err1 |
3174 | clevermous | 2992 | cmp eax, 2 |
2993 | jb .error_fat |
||
2994 | cmp eax, [ebp+FAT.fatRESERVED] |
||
2995 | jae .empty |
||
2643 | clevermous | 2996 | mov esi, eax |
2288 | clevermous | 2997 | xor ecx, ecx |
2998 | @@: |
||
2643 | clevermous | 2999 | lea eax, [esi-2] |
3000 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
3001 | add eax, [ebp+FAT.DATA_START] |
||
2288 | clevermous | 3002 | add eax, ecx |
2643 | clevermous | 3003 | lea ebx, [ebp+FAT.buffer] |
3004 | call fs_read32_sys |
||
3005 | test eax, eax |
||
3006 | lea eax, [ebx+0x200] |
||
2288 | clevermous | 3007 | jz .checkempty |
3008 | .err1: |
||
3009 | popad |
||
3010 | .err2: |
||
6845 | pathoswith | 3011 | push ERROR_DEVICE |
3012 | .ret: |
||
2643 | clevermous | 3013 | call fat_unlock |
6867 | pathoswith | 3014 | pop eax |
2288 | clevermous | 3015 | ret |
6845 | pathoswith | 3016 | |
3017 | .notFound: |
||
3018 | push ERROR_FILE_NOT_FOUND |
||
3019 | jmp .ret |
||
3020 | |||
3174 | clevermous | 3021 | .error_fat: |
3022 | popad |
||
6845 | pathoswith | 3023 | push ERROR_FS_FAIL |
3024 | jmp .ret |
||
3025 | |||
2288 | clevermous | 3026 | .notempty: |
3027 | popad |
||
3028 | .access_denied2: |
||
6845 | pathoswith | 3029 | push ERROR_ACCESS_DENIED |
3030 | jmp .ret |
||
3031 | |||
2288 | clevermous | 3032 | .empty: |
3033 | popad |
||
2643 | clevermous | 3034 | push eax ebx |
3035 | lea ebx, [ebp+FAT.buffer] |
||
3036 | call fs_read32_sys |
||
3037 | test eax, eax |
||
3038 | pop ebx eax |
||
2288 | clevermous | 3039 | jnz .err2 |
3040 | .dodel: |
||
3041 | push eax |
||
3042 | mov eax, [edi+20-2] |
||
3043 | mov ax, [edi+26] |
||
3044 | xchg eax, [esp] |
||
3045 | ; delete folder entry |
||
3046 | mov byte [edi], 0xE5 |
||
3047 | ; delete LFN (if present) |
||
3048 | .lfndel: |
||
2643 | clevermous | 3049 | lea edx, [ebp+FAT.buffer] |
3050 | cmp edi, edx |
||
2288 | clevermous | 3051 | ja @f |
2643 | clevermous | 3052 | cmp [ebp+FAT.longname_sec2], 0 |
2288 | clevermous | 3053 | jz .lfndone |
2643 | clevermous | 3054 | push [ebp+FAT.longname_sec2] |
3055 | push [ebp+FAT.longname_sec1] |
||
3056 | pop [ebp+FAT.longname_sec2] |
||
3057 | and [ebp+FAT.longname_sec1], 0 |
||
2288 | clevermous | 3058 | push ebx |
2643 | clevermous | 3059 | mov ebx, edx |
3060 | call fs_write32_sys |
||
2288 | clevermous | 3061 | mov eax, [esp+4] |
2643 | clevermous | 3062 | call fs_read32_sys |
2288 | clevermous | 3063 | pop ebx |
3064 | pop eax |
||
2643 | clevermous | 3065 | lea edi, [ebp+FAT.buffer+0x200] |
2288 | clevermous | 3066 | @@: |
3067 | sub edi, 0x20 |
||
3068 | cmp byte [edi], 0xE5 |
||
3069 | jz .lfndone |
||
3070 | cmp byte [edi+11], 0xF |
||
3071 | jnz .lfndone |
||
3072 | mov byte [edi], 0xE5 |
||
3073 | jmp .lfndel |
||
3074 | .lfndone: |
||
3075 | push ebx |
||
2643 | clevermous | 3076 | lea ebx, [ebp+FAT.buffer] |
3077 | call fs_write32_sys |
||
2288 | clevermous | 3078 | pop ebx |
3079 | ; delete FAT chain |
||
3080 | pop eax |
||
3081 | call clear_cluster_chain |
||
3082 | call update_disk |
||
2643 | clevermous | 3083 | call fat_unlock |
2288 | clevermous | 3084 | xor eax, eax |
3085 | ret=>=>>65536 |