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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: 6468 $ |
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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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14 | ; esi -> path string |
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15 | ; out: |
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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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106 | fat_create_partition: |
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5089 | clevermous | 107 | ; sector size must be 512 |
108 | cmp dword [esi+DISK.MediaInfo.SectorSize], 512 |
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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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2288 | clevermous | 148 | |
2643 | clevermous | 149 | lea ecx, [ebp+FAT.Lock] |
150 | call mutex_init |
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2288 | clevermous | 151 | |
2643 | clevermous | 152 | movzx eax, word [ebx+0xe] ; sectors reserved |
153 | mov [ebp+FAT.FAT_START], eax |
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2288 | clevermous | 154 | |
2643 | clevermous | 155 | movzx eax, byte [ebx+0xd] ; sectors per cluster |
156 | mov [ebp+FAT.SECTORS_PER_CLUSTER], eax |
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2288 | clevermous | 157 | |
2643 | clevermous | 158 | movzx ecx, word [ebx+0xb] ; bytes per sector |
159 | mov [ebp+FAT.BYTES_PER_SECTOR], ecx |
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2288 | clevermous | 160 | |
2643 | clevermous | 161 | movzx eax, word [ebx+0x11] ; count of rootdir entries (=0 fat32) |
162 | shl eax, 5 ; mul 32 |
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163 | dec ecx |
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164 | add eax, ecx ; round up if not equal count |
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165 | inc ecx ; bytes per sector |
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166 | xor edx, edx |
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167 | div ecx |
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168 | mov [ebp+FAT.ROOT_SECTORS], eax ; count of rootdir sectors |
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2288 | clevermous | 169 | |
2643 | clevermous | 170 | movzx eax, word [ebx+0x16] ; sectors per fat <65536 |
171 | test eax, eax |
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172 | jnz @f |
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173 | mov eax, [ebx+0x24] ; sectors per fat |
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2288 | clevermous | 174 | @@: |
2643 | clevermous | 175 | mov [ebp+FAT.SECTORS_PER_FAT], eax |
176 | |||
177 | movzx eax, byte [ebx+0x10] ; number of fats |
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178 | mov [ebp+FAT.NUMBER_OF_FATS], eax |
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4273 | clevermous | 179 | mul [ebp+FAT.SECTORS_PER_FAT] |
180 | test edx, edx |
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181 | jnz .free_return0 |
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2643 | clevermous | 182 | add eax, [ebp+FAT.FAT_START] |
4273 | clevermous | 183 | jc .free_return0 |
2643 | clevermous | 184 | mov [ebp+FAT.ROOT_START], eax ; rootdir = fat_start + fat_size * fat_count |
185 | add eax, [ebp+FAT.ROOT_SECTORS] ; rootdir sectors should be 0 on fat32 |
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4273 | clevermous | 186 | jc .free_return0 |
2643 | clevermous | 187 | mov [ebp+FAT.DATA_START], eax ; data area = rootdir + rootdir_size |
188 | |||
189 | movzx eax, word [ebx+0x13] ; total sector count <65536 |
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190 | test eax, eax |
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191 | jnz @f |
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192 | mov eax, [ebx+0x20] ; total sector count |
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193 | @@: |
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4273 | clevermous | 194 | ; total sector count must not exceed partition size |
195 | cmp dword [ebp+FAT.Length+4], 0 |
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196 | jnz @f |
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197 | cmp eax, dword [ebp+FAT.Length] |
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198 | ja .free_return0 |
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199 | @@: |
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3742 | clevermous | 200 | mov dword [ebp+FAT.Length], eax |
201 | and dword [ebp+FAT.Length+4], 0 |
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2643 | clevermous | 202 | sub eax, [ebp+FAT.DATA_START] ; eax = count of data sectors |
4273 | clevermous | 203 | jc .free_return0 |
2643 | clevermous | 204 | xor edx, edx |
205 | div [ebp+FAT.SECTORS_PER_CLUSTER] |
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206 | inc eax |
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207 | mov [ebp+FAT.LAST_CLUSTER], eax |
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208 | dec eax ; cluster count |
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4273 | clevermous | 209 | jz .free_return0 |
2643 | clevermous | 210 | mov [ebp+FAT.fatStartScan], 2 |
211 | |||
212 | ; limits by Microsoft Hardware White Paper v1.03 |
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213 | cmp eax, 4085 ; 0xff5 |
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4273 | clevermous | 214 | jb .fat12 |
2643 | clevermous | 215 | cmp eax, 65525 ; 0xfff5 |
216 | jb .fat16 |
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217 | .fat32: |
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218 | mov eax, [ebx+0x2c] ; rootdir cluster |
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219 | mov [ebp+FAT.ROOT_CLUSTER], eax |
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220 | movzx eax, word [ebx+0x30] |
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221 | mov [ebp+FAT.ADR_FSINFO], eax |
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222 | push ebx |
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223 | add ebx, 512 |
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224 | call fs_read32_sys |
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225 | test eax, eax |
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226 | jnz @f |
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227 | mov eax, [ebx+0x1ec] |
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228 | cmp eax, -1 |
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2288 | clevermous | 229 | jz @f |
2643 | clevermous | 230 | mov [ebp+FAT.fatStartScan], eax |
2288 | clevermous | 231 | @@: |
2643 | clevermous | 232 | pop ebx |
233 | mov [ebp+FAT.fatRESERVED], 0x0FFFFFF6 |
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234 | mov [ebp+FAT.fatBAD], 0x0FFFFFF7 |
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235 | mov [ebp+FAT.fatEND], 0x0FFFFFF8 |
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236 | mov [ebp+FAT.fatMASK], 0x0FFFFFFF |
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237 | mov al, 32 |
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4273 | clevermous | 238 | .fat_not_12_finalize: |
2643 | clevermous | 239 | mov [ebp+FAT.fs_type], al |
4273 | clevermous | 240 | ; For FAT16 and FAT32, allocate 512 bytes for FAT cache. |
241 | mov eax, 512 |
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242 | call malloc |
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243 | test eax, eax |
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244 | jz .free_return0 |
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245 | mov [ebp+FAT.fat_cache_ptr], eax |
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2643 | clevermous | 246 | mov eax, ebp |
247 | pop ebp |
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2288 | clevermous | 248 | ret |
2643 | clevermous | 249 | .fat16: |
250 | and [ebp+FAT.ROOT_CLUSTER], 0 |
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251 | mov [ebp+FAT.fatRESERVED], 0x0000FFF6 |
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252 | mov [ebp+FAT.fatBAD], 0x0000FFF7 |
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253 | mov [ebp+FAT.fatEND], 0x0000FFF8 |
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254 | mov [ebp+FAT.fatMASK], 0x0000FFFF |
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255 | mov al, 16 |
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4273 | clevermous | 256 | jmp .fat_not_12_finalize |
257 | .fat12: |
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258 | and [ebp+FAT.ROOT_CLUSTER], 0 |
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259 | mov [ebp+FAT.fatRESERVED], 0xFF6 |
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260 | mov [ebp+FAT.fatBAD], 0xFF7 |
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261 | mov [ebp+FAT.fatEND], 0xFFF |
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262 | mov [ebp+FAT.fatMASK], 0xFFF |
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263 | mov al, 12 |
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2643 | clevermous | 264 | mov [ebp+FAT.fs_type], al |
4273 | clevermous | 265 | ; For FAT12, allocate&read data for entire table: |
266 | ; calculate A = ALIGN_UP(NUM_CLUSTERS, 8), |
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267 | ; calculatefatchain/restorefatchain will process A items, |
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268 | ; allocate ALIGN_UP(A*3/2, 512) bytes for FAT table plus A*2 bytes for unpacked data. |
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269 | mov eax, [ebp+FAT.LAST_CLUSTER] |
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270 | and eax, not 7 |
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271 | add eax, 8 |
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272 | mov edx, eax |
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273 | lea eax, [eax*3] |
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274 | add eax, 512*2-1 |
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275 | shr eax, 10 |
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276 | shl eax, 9 |
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277 | lea eax, [eax+edx*2] |
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278 | call malloc |
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279 | test eax, eax |
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280 | jz .free_return0 |
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281 | ; Read ALIGN_UP(NUM_CLUSTERS*3/2, 512) bytes. |
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282 | ; Note that this can be less than allocated, this is ok, |
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283 | ; overallocation simplifies calculatefatchain/restorefatchain. |
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284 | push ebx |
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285 | mov [ebp+FAT.fat_cache_ptr], eax |
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286 | mov edx, [ebp+FAT.LAST_CLUSTER] |
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287 | lea edx, [(edx+1)*3 + 512*2-1] |
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288 | shr edx, 10 |
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289 | xchg eax, ebx |
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290 | xor eax, eax |
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291 | .read_fat: |
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292 | push eax |
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293 | add eax, [ebp+FAT.FAT_START] |
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294 | call fs_read32_sys |
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295 | test eax, eax |
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296 | pop eax |
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297 | jz @f |
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298 | dbgstr 'Failed to read FAT table' |
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299 | mov eax, [ebp+FAT.fat_cache_ptr] |
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300 | call free |
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301 | pop ebx |
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302 | jmp .free_return0 |
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303 | @@: |
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304 | add ebx, 512 |
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305 | inc eax |
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306 | cmp eax, edx |
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307 | jb .read_fat |
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308 | mov [ebp+FAT.fat12_unpacked_ptr], ebx |
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309 | call calculatefatchain |
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310 | pop ebx |
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2643 | clevermous | 311 | mov eax, ebp |
312 | pop ebp |
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2288 | clevermous | 313 | ret |
314 | |||
4273 | clevermous | 315 | fat_free: |
316 | push eax |
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317 | mov eax, [eax+FAT.fat_cache_ptr] |
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318 | call free |
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319 | pop eax |
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320 | jmp free |
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321 | |||
322 | calculatefatchain: |
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323 | |||
324 | pushad |
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325 | |||
326 | mov esi, [ebp+FAT.fat_cache_ptr] |
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327 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
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328 | |||
329 | mov edx, [ebp+FAT.LAST_CLUSTER] |
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330 | and edx, not 7 |
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331 | lea edx, [edi+(edx+8)*2] |
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332 | push edx |
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333 | |||
334 | fcnew: |
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335 | mov eax, dword [esi] |
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336 | mov ebx, dword [esi+4] |
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337 | mov ecx, dword [esi+8] |
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338 | mov edx, ecx |
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339 | shr edx, 4;8 ok |
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340 | shr dx, 4;7 ok |
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341 | xor ch, ch |
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342 | shld ecx, ebx, 20;6 ok |
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343 | shr cx, 4;5 ok |
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344 | shld ebx, eax, 12 |
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345 | and ebx, 0x0fffffff;4 ok |
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346 | shr bx, 4;3 ok |
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347 | shl eax, 4 |
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348 | and eax, 0x0fffffff;2 ok |
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349 | shr ax, 4;1 ok |
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350 | mov dword [edi], eax |
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351 | mov dword [edi+4], ebx |
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352 | mov dword [edi+8], ecx |
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353 | mov dword [edi+12], edx |
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354 | add edi, 16 |
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355 | add esi, 12 |
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356 | |||
357 | cmp edi, [esp] |
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358 | jnz fcnew |
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359 | pop eax |
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360 | |||
361 | popad |
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362 | ret |
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363 | |||
364 | |||
365 | restorefatchain: ; restore fat chain |
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366 | |||
367 | pushad |
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368 | |||
369 | mov esi, [ebp+FAT.fat12_unpacked_ptr] |
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370 | mov edi, [ebp+FAT.fat_cache_ptr] |
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371 | |||
372 | mov edx, [ebp+FAT.LAST_CLUSTER] |
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373 | and edx, not 7 |
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374 | lea edx, [esi+(edx+8)*2] |
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375 | |||
376 | fcnew2: |
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377 | mov eax, dword [esi] |
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378 | mov ebx, dword [esi+4] |
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379 | shl ax, 4 |
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380 | shl eax, 4 |
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381 | shl bx, 4 |
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382 | shr ebx, 4 |
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383 | shrd eax, ebx, 8 |
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384 | shr ebx, 8 |
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385 | mov dword [edi], eax |
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386 | mov word [edi+4], bx |
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387 | add edi, 6 |
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388 | add esi, 8 |
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389 | |||
390 | cmp esi, edx |
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391 | jb fcnew2 |
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392 | |||
393 | mov esi, [ebp+FAT.NUMBER_OF_FATS] |
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394 | mov edx, [ebp+FAT.LAST_CLUSTER] |
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395 | lea edx, [(edx+1)*3 + 512*2-1] |
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396 | shr edx, 10 |
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397 | push [ebp+FAT.FAT_START] |
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398 | |||
399 | .write_fats: |
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400 | xor eax, eax |
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401 | mov ebx, [ebp+FAT.fat_cache_ptr] |
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402 | .loop1: |
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403 | push eax |
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404 | add eax, [esp+4] |
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405 | call fs_write32_sys |
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406 | test eax, eax |
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407 | pop eax |
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408 | jnz .fail |
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409 | add ebx, 512 |
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410 | inc eax |
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411 | cmp eax, edx |
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412 | jb .loop1 |
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413 | pop eax |
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414 | add eax, [ebp+FAT.SECTORS_PER_FAT] |
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415 | push eax |
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416 | dec esi |
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417 | jnz .write_fats |
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418 | pop eax |
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419 | |||
420 | popad |
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421 | ret |
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422 | .fail: |
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423 | dbgstr 'Failed to save FAT' |
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424 | popad |
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425 | ret |
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426 | |||
427 | iglobal |
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428 | label fat_legal_chars byte |
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429 | ; 0 = not allowed |
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430 | ; 1 = allowed only in long names |
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431 | ; 3 = allowed |
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432 | times 32 db 0 |
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433 | ; ! " # $ % & ' ( ) * + , - . / |
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434 | db 1,3,0,3,3,3,3,3,3,3,0,1,1,3,3,0 |
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435 | ; 0 1 2 3 4 5 6 7 8 9 : ; < = > ? |
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436 | db 3,3,3,3,3,3,3,3,3,3,0,1,0,1,0,0 |
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437 | ; @ A B C D E F G H I J K L M N O |
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438 | db 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 |
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439 | ; P Q R S T U V W X Y Z [ \ ] ^ _ |
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440 | db 3,3,3,3,3,3,3,3,3,3,3,1,0,1,3,3 |
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441 | ; ` a b c d e f g h i j k l m n o |
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442 | db 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 |
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443 | ; p q r s t u v w x y z { | } ~ |
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444 | db 3,3,3,3,3,3,3,3,3,3,3,3,0,3,3,0 |
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445 | endg |
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446 | |||
447 | fat_name_is_legal: |
||
448 | ; in: esi->(long) name |
||
449 | ; out: CF set <=> legal |
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450 | ; destroys eax |
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451 | push esi |
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452 | xor eax, eax |
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453 | @@: |
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454 | lodsb |
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455 | test al, al |
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456 | jz .done |
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457 | cmp al, 80h |
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458 | jae .big |
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459 | test [fat_legal_chars+eax], 1 |
||
460 | jnz @b |
||
461 | .err: |
||
462 | pop esi |
||
463 | clc |
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464 | ret |
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465 | .big: |
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466 | ; 0x80-0xAF, 0xE0-0xEF |
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467 | cmp al, 0xB0 |
||
468 | jb @b |
||
469 | cmp al, 0xE0 |
||
470 | jb .err |
||
471 | cmp al, 0xF0 |
||
472 | jb @b |
||
473 | jmp .err |
||
474 | .done: |
||
475 | sub esi, [esp] |
||
476 | cmp esi, 257 |
||
477 | pop esi |
||
478 | ret |
||
479 | |||
480 | fat_next_short_name: |
||
481 | ; in: edi->8+3 name |
||
482 | ; out: name corrected |
||
483 | ; CF=1 <=> error |
||
484 | pushad |
||
485 | mov ecx, 8 |
||
486 | mov al, '~' |
||
487 | std |
||
488 | push edi |
||
489 | add edi, 7 |
||
490 | repnz scasb |
||
491 | pop edi |
||
492 | cld |
||
493 | jz .tilde |
||
494 | ; tilde is not found, insert "~1" at end |
||
495 | add edi, 6 |
||
496 | cmp word [edi], ' ' |
||
497 | jnz .insert_tilde |
||
498 | @@: |
||
499 | dec edi |
||
500 | cmp byte [edi], ' ' |
||
501 | jz @b |
||
502 | inc edi |
||
503 | .insert_tilde: |
||
504 | mov word [edi], '~1' |
||
505 | popad |
||
506 | clc |
||
507 | ret |
||
508 | .tilde: |
||
509 | push edi |
||
510 | add edi, 7 |
||
511 | xor ecx, ecx |
||
512 | @@: |
||
513 | ; after tilde may be only digits and trailing spaces |
||
514 | cmp byte [edi], '~' |
||
515 | jz .break |
||
516 | cmp byte [edi], ' ' |
||
517 | jz .space |
||
518 | cmp byte [edi], '9' |
||
519 | jnz .found |
||
520 | dec edi |
||
521 | jmp @b |
||
522 | .space: |
||
523 | dec edi |
||
524 | inc ecx |
||
525 | jmp @b |
||
526 | .found: |
||
527 | inc byte [edi] |
||
528 | add dword [esp], 8 |
||
529 | jmp .zerorest |
||
530 | .break: |
||
531 | jecxz .noplace |
||
532 | inc edi |
||
533 | mov al, '1' |
||
534 | @@: |
||
535 | xchg al, [edi] |
||
536 | inc edi |
||
537 | cmp al, ' ' |
||
538 | mov al, '0' |
||
539 | jnz @b |
||
540 | .succ: |
||
541 | pop edi |
||
542 | popad |
||
543 | clc |
||
544 | ret |
||
545 | .noplace: |
||
546 | dec edi |
||
547 | cmp edi, [esp] |
||
548 | jz .err |
||
549 | add dword [esp], 8 |
||
550 | mov word [edi], '~1' |
||
551 | inc edi |
||
552 | inc edi |
||
553 | @@: |
||
554 | mov byte [edi], '0' |
||
555 | .zerorest: |
||
556 | inc edi |
||
557 | cmp edi, [esp] |
||
558 | jb @b |
||
559 | pop edi |
||
560 | popad |
||
561 | ;clc ; automatically |
||
562 | ret |
||
563 | .err: |
||
564 | pop edi |
||
565 | popad |
||
566 | stc |
||
567 | ret |
||
568 | |||
569 | fat_gen_short_name: |
||
570 | ; in: esi->long name |
||
571 | ; edi->buffer (8+3=11 chars) |
||
572 | ; out: buffer filled |
||
573 | pushad |
||
574 | mov eax, ' ' |
||
575 | push edi |
||
576 | stosd |
||
577 | stosd |
||
578 | stosd |
||
579 | pop edi |
||
580 | xor eax, eax |
||
581 | movi ebx, 8 |
||
582 | lea ecx, [edi+8] |
||
583 | .loop: |
||
584 | lodsb |
||
585 | test al, al |
||
586 | jz .done |
||
587 | call char_toupper |
||
588 | cmp al, ' ' |
||
589 | jz .space |
||
590 | cmp al, 80h |
||
591 | ja .big |
||
592 | test [fat_legal_chars+eax], 2 |
||
593 | jnz .symbol |
||
594 | .inv_symbol: |
||
595 | mov al, '_' |
||
596 | or bh, 1 |
||
597 | .symbol: |
||
598 | cmp al, '.' |
||
599 | jz .dot |
||
600 | .normal_symbol: |
||
601 | dec bl |
||
602 | jns .store |
||
603 | mov bl, 0 |
||
604 | .space: |
||
605 | or bh, 1 |
||
606 | jmp .loop |
||
607 | .store: |
||
608 | stosb |
||
609 | jmp .loop |
||
610 | .big: |
||
611 | cmp al, 0xB0 |
||
612 | jb .normal_symbol |
||
613 | cmp al, 0xE0 |
||
614 | jb .inv_symbol |
||
615 | cmp al, 0xF0 |
||
616 | jb .normal_symbol |
||
617 | jmp .inv_symbol |
||
618 | .dot: |
||
619 | test bh, 2 |
||
620 | jz .firstdot |
||
621 | pop ebx |
||
622 | add ebx, edi |
||
623 | sub ebx, ecx |
||
624 | push ebx |
||
625 | cmp ebx, ecx |
||
626 | jb @f |
||
627 | pop ebx |
||
628 | push ecx |
||
629 | @@: |
||
630 | cmp edi, ecx |
||
631 | jbe .skip |
||
632 | @@: |
||
633 | dec edi |
||
634 | mov al, [edi] |
||
635 | dec ebx |
||
636 | mov [ebx], al |
||
637 | mov byte [edi], ' ' |
||
638 | cmp edi, ecx |
||
639 | ja @b |
||
640 | .skip: |
||
641 | mov bh, 3 |
||
642 | jmp @f |
||
643 | .firstdot: |
||
644 | cmp bl, 8 |
||
645 | jz .space |
||
646 | push edi |
||
647 | or bh, 2 |
||
648 | @@: |
||
649 | mov edi, ecx |
||
650 | mov bl, 3 |
||
651 | jmp .loop |
||
652 | .done: |
||
653 | test bh, 2 |
||
654 | jz @f |
||
655 | pop edi |
||
656 | @@: |
||
657 | lea edi, [ecx-8] |
||
658 | test bh, 1 |
||
659 | jz @f |
||
660 | call fat_next_short_name |
||
661 | @@: |
||
662 | popad |
||
663 | ret |
||
664 | |||
665 | fat12_free_space: |
||
666 | ;--------------------------------------------- |
||
667 | ; |
||
668 | ; returns free space in edi |
||
669 | ; rewr.by Mihasik |
||
670 | ;--------------------------------------------- |
||
671 | |||
672 | push eax ebx ecx |
||
673 | |||
674 | mov edi, [ebp+FAT.fat12_unpacked_ptr];start of FAT |
||
675 | xor ax, ax;Free cluster=0x0000 in FAT |
||
676 | xor ebx, ebx;counter |
||
677 | mov ecx, [ebp+FAT.LAST_CLUSTER] |
||
678 | inc ecx |
||
679 | cld |
||
680 | rdfs1: |
||
681 | repne scasw |
||
682 | jnz rdfs2 ;if last cluster not 0 |
||
683 | inc ebx |
||
684 | test ecx, ecx |
||
685 | jnz rdfs1 |
||
686 | rdfs2: |
||
687 | shl ebx, 9;free clusters*512 |
||
688 | mov edi, ebx |
||
689 | |||
690 | pop ecx ebx eax |
||
691 | ret |
||
692 | |||
693 | |||
694 | |||
2288 | clevermous | 695 | set_FAT: |
696 | ;-------------------------------- |
||
697 | ; input : EAX = cluster |
||
698 | ; EDX = value to save |
||
2643 | clevermous | 699 | ; EBP = pointer to FAT structure |
2288 | clevermous | 700 | ; output : EDX = old value |
701 | ;-------------------------------- |
||
2643 | clevermous | 702 | ; out: CF set <=> error |
2288 | clevermous | 703 | push eax ebx esi |
704 | |||
705 | cmp eax, 2 |
||
706 | jb sfc_error |
||
2643 | clevermous | 707 | cmp eax, [ebp+FAT.LAST_CLUSTER] |
2288 | clevermous | 708 | ja sfc_error |
4273 | clevermous | 709 | cmp [ebp+FAT.fs_type], 12 |
710 | je set_FAT12 |
||
2643 | clevermous | 711 | cmp [ebp+FAT.fs_type], 16 |
2288 | clevermous | 712 | je sfc_1 |
713 | add eax, eax |
||
714 | sfc_1: |
||
715 | add eax, eax |
||
716 | mov esi, 511 |
||
717 | and esi, eax ; esi = position in fat sector |
||
718 | shr eax, 9 ; eax = fat sector |
||
2643 | clevermous | 719 | add eax, [ebp+FAT.FAT_START] |
4273 | clevermous | 720 | mov ebx, [ebp+FAT.fat_cache_ptr] |
2288 | clevermous | 721 | |
2643 | clevermous | 722 | cmp eax, [ebp+FAT.fat_in_cache]; is fat sector already in memory? |
2288 | clevermous | 723 | je sfc_in_cache ; yes |
724 | |||
2643 | clevermous | 725 | cmp [ebp+FAT.fat_change], 0; is fat changed? |
2288 | clevermous | 726 | je sfc_no_change ; no |
727 | call write_fat_sector; yes. write it into disk |
||
2643 | clevermous | 728 | jc sfc_error |
2288 | clevermous | 729 | |
730 | sfc_no_change: |
||
2643 | clevermous | 731 | mov [ebp+FAT.fat_in_cache], eax; save fat sector |
732 | call fs_read32_sys |
||
733 | test eax, eax |
||
2288 | clevermous | 734 | jne sfc_error |
735 | |||
736 | |||
737 | sfc_in_cache: |
||
2643 | clevermous | 738 | cmp [ebp+FAT.fs_type], 16 |
2288 | clevermous | 739 | jne sfc_test32 |
740 | |||
741 | sfc_set16: |
||
742 | xchg [ebx+esi], dx ; save new value and get old value |
||
743 | jmp sfc_write |
||
744 | |||
745 | sfc_test32: |
||
2643 | clevermous | 746 | mov eax, [ebp+FAT.fatMASK] |
2288 | clevermous | 747 | |
748 | sfc_set32: |
||
749 | and edx, eax |
||
750 | xor eax, -1 ; mask for high bits |
||
751 | and eax, [ebx+esi] ; get high 4 bits |
||
752 | or eax, edx |
||
753 | mov edx, [ebx+esi] ; get old value |
||
754 | mov [ebx+esi], eax ; save new value |
||
755 | |||
756 | sfc_write: |
||
2643 | clevermous | 757 | mov [ebp+FAT.fat_change], 1; fat has changed |
2288 | clevermous | 758 | |
759 | sfc_nonzero: |
||
2643 | clevermous | 760 | and edx, [ebp+FAT.fatMASK] |
2288 | clevermous | 761 | |
2643 | clevermous | 762 | sfc_return: |
2288 | clevermous | 763 | pop esi ebx eax |
764 | ret |
||
2643 | clevermous | 765 | sfc_error: |
766 | stc |
||
767 | jmp sfc_return |
||
2288 | clevermous | 768 | |
4273 | clevermous | 769 | set_FAT12: |
770 | test edx, 0xF000 |
||
771 | jnz sfc_error |
||
772 | mov ebx, [ebp+FAT.fat12_unpacked_ptr] |
||
773 | xchg [ebx+eax*2], dx |
||
774 | mov [ebp+FAT.fat_change], 1 |
||
775 | pop esi ebx eax |
||
776 | clc |
||
777 | ret |
||
2288 | clevermous | 778 | |
779 | get_FAT: |
||
780 | ;-------------------------------- |
||
781 | ; input : EAX = cluster |
||
2643 | clevermous | 782 | ; EBP = pointer to FAT structure |
2288 | clevermous | 783 | ; output : EAX = next cluster |
784 | ;-------------------------------- |
||
2643 | clevermous | 785 | ; out: CF set <=> error |
2288 | clevermous | 786 | push ebx esi |
787 | |||
4273 | clevermous | 788 | cmp [ebp+FAT.fs_type], 12 |
789 | je get_FAT12 |
||
790 | |||
2643 | clevermous | 791 | cmp [ebp+FAT.fs_type], 16 |
2288 | clevermous | 792 | je gfc_1 |
793 | add eax, eax |
||
794 | gfc_1: |
||
795 | add eax, eax |
||
796 | mov esi, 511 |
||
797 | and esi, eax ; esi = position in fat sector |
||
798 | shr eax, 9 ; eax = fat sector |
||
2643 | clevermous | 799 | add eax, [ebp+FAT.FAT_START] |
4273 | clevermous | 800 | mov ebx, [ebp+FAT.fat_cache_ptr] |
2288 | clevermous | 801 | |
2643 | clevermous | 802 | cmp eax, [ebp+FAT.fat_in_cache]; is fat sector already in memory? |
2288 | clevermous | 803 | je gfc_in_cache |
804 | |||
2643 | clevermous | 805 | cmp [ebp+FAT.fat_change], 0; is fat changed? |
2288 | clevermous | 806 | je gfc_no_change ; no |
807 | call write_fat_sector; yes. write it into disk |
||
2643 | clevermous | 808 | jc hd_error_01 |
2288 | clevermous | 809 | |
810 | gfc_no_change: |
||
2643 | clevermous | 811 | mov [ebp+FAT.fat_in_cache], eax |
812 | call fs_read32_sys |
||
813 | test eax, eax |
||
2288 | clevermous | 814 | jne hd_error_01 |
815 | |||
816 | gfc_in_cache: |
||
817 | mov eax, [ebx+esi] |
||
2643 | clevermous | 818 | and eax, [ebp+FAT.fatMASK] |
819 | gfc_return: |
||
2288 | clevermous | 820 | pop esi ebx |
821 | ret |
||
2643 | clevermous | 822 | hd_error_01: |
823 | stc |
||
824 | jmp gfc_return |
||
2288 | clevermous | 825 | |
4273 | clevermous | 826 | get_FAT12: |
827 | mov ebx, [ebp+FAT.fat12_unpacked_ptr] |
||
828 | movzx eax, word [ebx+eax*2] |
||
829 | pop esi ebx |
||
830 | clc |
||
831 | ret |
||
2288 | clevermous | 832 | |
4273 | clevermous | 833 | |
2288 | clevermous | 834 | get_free_FAT: |
835 | ;----------------------------------------------------------- |
||
836 | ; output : if CARRY=0 EAX = # first cluster found free |
||
837 | ; if CARRY=1 disk full |
||
838 | ; Note : for more speed need to use fat_cache directly |
||
839 | ;----------------------------------------------------------- |
||
840 | push ecx |
||
2643 | clevermous | 841 | mov ecx, [ebp+FAT.LAST_CLUSTER]; counter for full disk |
842 | mov eax, [ebp+FAT.fatStartScan] |
||
4273 | clevermous | 843 | cmp [ebp+FAT.fs_type], 12 |
844 | jz get_free_FAT12 |
||
845 | dec ecx |
||
2288 | clevermous | 846 | cmp eax, 2 |
847 | jb gff_reset |
||
848 | |||
849 | gff_test: |
||
2643 | clevermous | 850 | cmp eax, [ebp+FAT.LAST_CLUSTER]; if above last cluster start at cluster 2 |
2288 | clevermous | 851 | jbe gff_in_range |
852 | gff_reset: |
||
853 | mov eax, 2 |
||
854 | |||
855 | gff_in_range: |
||
856 | push eax |
||
857 | call get_FAT ; get cluster state |
||
2643 | clevermous | 858 | jc gff_not_found_1 |
2288 | clevermous | 859 | |
860 | test eax, eax ; is it free? |
||
861 | pop eax |
||
862 | je gff_found ; yes |
||
863 | inc eax ; next cluster |
||
864 | dec ecx ; is all checked? |
||
4273 | clevermous | 865 | jnz gff_test ; no |
2288 | clevermous | 866 | |
867 | gff_not_found: |
||
868 | pop ecx ; yes. disk is full |
||
869 | stc |
||
870 | ret |
||
871 | |||
2643 | clevermous | 872 | gff_not_found_1: |
873 | pop eax |
||
874 | jmp gff_not_found |
||
875 | |||
2288 | clevermous | 876 | gff_found: |
877 | lea ecx, [eax+1] |
||
2643 | clevermous | 878 | mov [ebp+FAT.fatStartScan], ecx |
2288 | clevermous | 879 | pop ecx |
880 | clc |
||
881 | ret |
||
882 | |||
4273 | clevermous | 883 | get_free_FAT12: |
884 | push edx edi |
||
885 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
||
886 | cmp eax, 2 |
||
887 | jb .reset |
||
888 | cmp eax, ecx |
||
889 | jbe @f |
||
890 | .reset: |
||
891 | mov eax, 2 |
||
892 | @@: |
||
893 | mov edx, eax |
||
894 | lea edi, [edi+eax*2] |
||
895 | sub ecx, eax |
||
896 | inc ecx |
||
897 | xor eax, eax |
||
898 | repnz scasw |
||
899 | jz .found |
||
900 | cmp edx, 2 |
||
901 | jz .notfound |
||
902 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
||
903 | lea ecx, [edx-2] |
||
904 | repnz scasw |
||
905 | jnz .notfound |
||
906 | .found: |
||
907 | sub edi, [ebp+FAT.fat12_unpacked_ptr] |
||
908 | shr edi, 1 |
||
909 | mov [ebp+FAT.fatStartScan], edi |
||
910 | lea eax, [edi-1] |
||
911 | pop edi edx ecx |
||
912 | ret |
||
913 | .notfound: |
||
914 | pop edi edx ecx |
||
915 | stc |
||
916 | ret |
||
2288 | clevermous | 917 | |
4273 | clevermous | 918 | |
2288 | clevermous | 919 | write_fat_sector: |
920 | ;----------------------------------------------------------- |
||
921 | ; write changed fat to disk |
||
922 | ;----------------------------------------------------------- |
||
923 | push eax ebx ecx |
||
924 | |||
2643 | clevermous | 925 | mov [ebp+FAT.fat_change], 0 |
926 | mov eax, [ebp+FAT.fat_in_cache] |
||
2288 | clevermous | 927 | cmp eax, -1 |
928 | jz write_fat_not_used |
||
4273 | clevermous | 929 | mov ebx, [ebp+FAT.fat_cache_ptr] |
2643 | clevermous | 930 | mov ecx, [ebp+FAT.NUMBER_OF_FATS] |
2288 | clevermous | 931 | |
932 | write_next_fat: |
||
2643 | clevermous | 933 | push eax |
934 | call fs_write32_sys |
||
935 | test eax, eax |
||
936 | pop eax |
||
937 | jnz write_fat_not_used |
||
2288 | clevermous | 938 | |
2643 | clevermous | 939 | add eax, [ebp+FAT.SECTORS_PER_FAT] |
2288 | clevermous | 940 | dec ecx |
941 | jnz write_next_fat |
||
942 | |||
943 | write_fat_not_used: |
||
944 | pop ecx ebx eax |
||
945 | ret |
||
946 | |||
947 | |||
948 | |||
949 | |||
950 | |||
951 | bcd2bin: |
||
952 | ;---------------------------------- |
||
953 | ; input : AL=BCD number (eg. 0x11) |
||
954 | ; output : AH=0 |
||
955 | ; AL=decimal number (eg. 11) |
||
956 | ;---------------------------------- |
||
957 | xor ah, ah |
||
958 | shl ax, 4 |
||
959 | shr al, 4 |
||
960 | aad |
||
961 | ret |
||
962 | |||
963 | |||
964 | get_date_for_file: |
||
965 | ;----------------------------------------------------- |
||
966 | ; Get date from CMOS and pack day,month,year in AX |
||
967 | ; DATE bits 0..4 : day of month 0..31 |
||
968 | ; 5..8 : month of year 1..12 |
||
969 | ; 9..15 : count of years from 1980 |
||
970 | ;----------------------------------------------------- |
||
971 | mov al, 0x7 ;day |
||
972 | out 0x70, al |
||
973 | in al, 0x71 |
||
974 | call bcd2bin |
||
975 | ror eax, 5 |
||
976 | |||
977 | mov al, 0x8 ;month |
||
978 | out 0x70, al |
||
979 | in al, 0x71 |
||
980 | call bcd2bin |
||
981 | ror eax, 4 |
||
982 | |||
983 | mov al, 0x9 ;year |
||
984 | out 0x70, al |
||
985 | in al, 0x71 |
||
986 | call bcd2bin |
||
987 | add ax, 20 ;because CMOS return only the two last |
||
988 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
||
989 | rol eax, 9 ;need the difference with 1980 (eg. 2001-1980) |
||
990 | ret |
||
991 | |||
992 | |||
993 | get_time_for_file: |
||
994 | ;----------------------------------------------------- |
||
995 | ; Get time from CMOS and pack hour,minute,second in AX |
||
996 | ; TIME bits 0..4 : second (the low bit is lost) |
||
997 | ; 5..10 : minute 0..59 |
||
998 | ; 11..15 : hour 0..23 |
||
999 | ;----------------------------------------------------- |
||
1000 | mov al, 0x0 ;second |
||
1001 | out 0x70, al |
||
1002 | in al, 0x71 |
||
1003 | call bcd2bin |
||
1004 | ror eax, 6 |
||
1005 | |||
1006 | mov al, 0x2 ;minute |
||
1007 | out 0x70, al |
||
1008 | in al, 0x71 |
||
1009 | call bcd2bin |
||
1010 | ror eax, 6 |
||
1011 | |||
1012 | mov al, 0x4 ;hour |
||
1013 | out 0x70, al |
||
1014 | in al, 0x71 |
||
1015 | call bcd2bin |
||
1016 | rol eax, 11 |
||
1017 | ret |
||
1018 | |||
1019 | |||
1020 | set_current_time_for_entry: |
||
1021 | ;----------------------------------------------------- |
||
1022 | ; Set current time/date for file entry |
||
1023 | ; input : ebx = file entry pointer |
||
1024 | ;----------------------------------------------------- |
||
1025 | push eax |
||
1026 | call get_time_for_file; update files date/time |
||
1027 | mov [ebx+22], ax |
||
1028 | call get_date_for_file |
||
1029 | mov [ebx+24], ax |
||
1030 | pop eax |
||
1031 | ret |
||
1032 | |||
1033 | |||
1034 | |||
1035 | add_disk_free_space: |
||
1036 | ;----------------------------------------------------- |
||
1037 | ; input : ecx = cluster count |
||
1038 | ; Note : negative = remove clusters from free space |
||
1039 | ; positive = add clusters to free space |
||
1040 | ;----------------------------------------------------- |
||
1041 | test ecx, ecx ; no change |
||
1042 | je add_dfs_no |
||
2643 | clevermous | 1043 | cmp [ebp+FAT.fs_type], 32 ; free disk space only used by fat32 |
2288 | clevermous | 1044 | jne add_dfs_no |
1045 | |||
1046 | push eax ebx |
||
2643 | clevermous | 1047 | mov eax, [ebp+FAT.ADR_FSINFO] |
1048 | lea ebx, [ebp+FAT.fsinfo_buffer] |
||
1049 | call fs_read32_sys |
||
1050 | test eax, eax |
||
1051 | jnz add_not_fs |
||
2288 | clevermous | 1052 | |
1053 | cmp dword [ebx+0x1fc], 0xaa550000; check sector id |
||
1054 | jne add_not_fs |
||
1055 | |||
1056 | add [ebx+0x1e8], ecx |
||
2643 | clevermous | 1057 | push [ebp+FAT.fatStartScan] |
2288 | clevermous | 1058 | pop dword [ebx+0x1ec] |
2643 | clevermous | 1059 | mov eax, [ebp+FAT.ADR_FSINFO] |
1060 | call fs_write32_sys |
||
1061 | ; jc add_not_fs |
||
2288 | clevermous | 1062 | |
1063 | add_not_fs: |
||
1064 | pop ebx eax |
||
1065 | |||
1066 | add_dfs_no: |
||
1067 | ret |
||
1068 | |||
1069 | |||
1070 | |||
1071 | clear_cluster_chain: |
||
1072 | ;----------------------------------------------------- |
||
1073 | ; input : eax = first cluster |
||
1074 | ;----------------------------------------------------- |
||
1075 | push eax ecx edx |
||
1076 | xor ecx, ecx ; cluster count |
||
1077 | |||
1078 | clean_new_chain: |
||
2643 | clevermous | 1079 | cmp eax, [ebp+FAT.LAST_CLUSTER]; end of file |
2288 | clevermous | 1080 | ja delete_OK |
1081 | cmp eax, 2 ; unfinished fat chain or zero length file |
||
1082 | jb delete_OK |
||
2643 | clevermous | 1083 | cmp eax, [ebp+FAT.ROOT_CLUSTER]; don't remove root cluster |
2288 | clevermous | 1084 | jz delete_OK |
1085 | |||
1086 | xor edx, edx |
||
1087 | call set_FAT ; clear fat entry |
||
2643 | clevermous | 1088 | jc access_denied_01 |
2288 | clevermous | 1089 | |
1090 | inc ecx ; update cluster count |
||
1091 | mov eax, edx ; old cluster |
||
1092 | jmp clean_new_chain |
||
1093 | |||
1094 | delete_OK: |
||
1095 | call add_disk_free_space; add clusters to free disk space |
||
2643 | clevermous | 1096 | clc |
2288 | clevermous | 1097 | access_denied_01: |
1098 | pop edx ecx eax |
||
1099 | ret |
||
1100 | |||
1101 | |||
2643 | clevermous | 1102 | if 0 |
2288 | clevermous | 1103 | get_hd_info: |
1104 | ;----------------------------------------------------------- |
||
1105 | ; output : eax = 0 - ok |
||
1106 | ; 3 - unknown FS |
||
1107 | ; 10 - access denied |
||
1108 | ; edx = cluster size in bytes |
||
1109 | ; ebx = total clusters on disk |
||
1110 | ; ecx = free clusters on disk |
||
1111 | ;----------------------------------------------------------- |
||
2643 | clevermous | 1112 | cmp [ebp+FAT.fs_type], 16 |
2288 | clevermous | 1113 | jz info_fat_ok |
2643 | clevermous | 1114 | cmp [ebp+FAT.fs_type], 32 |
2288 | clevermous | 1115 | jz info_fat_ok |
1116 | xor edx, edx |
||
1117 | xor ebx, ebx |
||
1118 | xor ecx, ecx |
||
1119 | mov eax, ERROR_UNKNOWN_FS |
||
1120 | ret |
||
1121 | |||
1122 | info_fat_ok: |
||
1123 | ; call reserve_hd1 |
||
1124 | |||
1125 | xor ecx, ecx ; count of free clusters |
||
1126 | mov eax, 2 |
||
2643 | clevermous | 1127 | mov ebx, [ebp+FAT.LAST_CLUSTER] |
2288 | clevermous | 1128 | |
1129 | info_cluster: |
||
1130 | push eax |
||
1131 | call get_FAT ; get cluster info |
||
2643 | clevermous | 1132 | jc info_access_denied |
2288 | clevermous | 1133 | |
1134 | test eax, eax ; is it free? |
||
1135 | jnz info_used ; no |
||
1136 | inc ecx |
||
1137 | |||
1138 | info_used: |
||
1139 | pop eax |
||
1140 | inc eax |
||
1141 | cmp eax, ebx ; is above last cluster? |
||
1142 | jbe info_cluster ; no. test next cluster |
||
1143 | |||
1144 | dec ebx ; cluster count |
||
2643 | clevermous | 1145 | imul edx, [ebp+FAT.SECTORS_PER_CLUSTER], 512; cluster size in bytes |
2288 | clevermous | 1146 | xor eax, eax |
1147 | ret |
||
1148 | |||
1149 | info_access_denied: |
||
1150 | add esp, 4 |
||
1151 | xor edx, edx |
||
1152 | xor ebx, ebx |
||
1153 | xor ecx, ecx |
||
1154 | mov eax, ERROR_ACCESS_DENIED |
||
1155 | ret |
||
2643 | clevermous | 1156 | end if |
2288 | clevermous | 1157 | |
1158 | update_disk: |
||
4273 | clevermous | 1159 | cmp [ebp+FAT.fat_change], 0 ; is fat changed? |
1160 | je upd_no_change |
||
1161 | cmp [ebp+FAT.fs_type], 12 |
||
1162 | jz .fat12 |
||
2288 | clevermous | 1163 | ;----------------------------------------------------------- |
1164 | ; write changed fat and cache to disk |
||
1165 | ;----------------------------------------------------------- |
||
1166 | |||
1167 | call write_fat_sector |
||
2643 | clevermous | 1168 | jc update_disk_acces_denied |
4273 | clevermous | 1169 | jmp upd_no_change |
1170 | .fat12: |
||
1171 | call restorefatchain |
||
1172 | mov [ebp+FAT.fat_change], 0 |
||
2288 | clevermous | 1173 | |
1174 | upd_no_change: |
||
1175 | |||
2643 | clevermous | 1176 | push esi |
1177 | mov esi, [ebp+PARTITION.Disk] |
||
1178 | call disk_sync |
||
1179 | pop esi |
||
2288 | clevermous | 1180 | update_disk_acces_denied: |
1181 | ret |
||
1182 | |||
2643 | clevermous | 1183 | fat_lock: |
1184 | lea ecx, [ebp+FAT.Lock] |
||
1185 | jmp mutex_lock |
||
1186 | fat_unlock: |
||
1187 | lea ecx, [ebp+FAT.Lock] |
||
1188 | jmp mutex_unlock |
||
2288 | clevermous | 1189 | |
4273 | clevermous | 1190 | |
1191 | fat_get_name: |
||
1192 | ; in: edi->FAT entry |
||
1193 | ; out: CF=1 - no valid entry |
||
1194 | ; else CF=0 and ebp->ASCIIZ-name |
||
1195 | ; (maximum length of filename is 255 (wide) symbols without trailing 0, |
||
1196 | ; but implementation requires buffer 261 words) |
||
1197 | ; destroys eax |
||
1198 | cmp byte [edi], 0 |
||
1199 | jz .no |
||
1200 | cmp byte [edi], 0xE5 |
||
1201 | jnz @f |
||
1202 | .no: |
||
1203 | stc |
||
1204 | ret |
||
1205 | @@: |
||
1206 | cmp byte [edi+11], 0xF |
||
1207 | jz .longname |
||
1208 | test byte [edi+11], 8 |
||
1209 | jnz .no |
||
1210 | push ecx |
||
1211 | push edi ebp |
||
1212 | test byte [ebp-4], 1 |
||
1213 | jnz .unicode_short |
||
1214 | |||
1215 | mov eax, [edi] |
||
1216 | mov ecx, [edi+4] |
||
1217 | mov [ebp], eax |
||
1218 | mov [ebp+4], ecx |
||
1219 | |||
1220 | mov ecx, 8 |
||
1221 | @@: |
||
1222 | cmp byte [ebp+ecx-1], ' ' |
||
1223 | loope @b |
||
1224 | |||
1225 | mov eax, [edi+8] |
||
1226 | cmp al, ' ' |
||
1227 | je .done |
||
1228 | shl eax, 8 |
||
1229 | mov al, '.' |
||
1230 | |||
1231 | lea ebp, [ebp+ecx+1] |
||
1232 | mov [ebp], eax |
||
1233 | mov ecx, 3 |
||
1234 | @@: |
||
1235 | rol eax, 8 |
||
1236 | cmp al, ' ' |
||
1237 | jne .done |
||
1238 | loop @b |
||
1239 | dec ebp |
||
1240 | .done: |
||
1241 | and byte [ebp+ecx+1], 0 ; CF=0 |
||
1242 | pop ebp edi ecx |
||
1243 | ret |
||
1244 | .unicode_short: |
||
1245 | mov ecx, 8 |
||
1246 | push ecx |
||
1247 | @@: |
||
1248 | mov al, [edi] |
||
1249 | inc edi |
||
1250 | call ansi2uni_char |
||
1251 | mov [ebp], ax |
||
1252 | inc ebp |
||
1253 | inc ebp |
||
1254 | loop @b |
||
1255 | pop ecx |
||
1256 | @@: |
||
1257 | cmp word [ebp-2], ' ' |
||
1258 | jnz @f |
||
1259 | dec ebp |
||
1260 | dec ebp |
||
1261 | loop @b |
||
1262 | @@: |
||
1263 | mov word [ebp], '.' |
||
1264 | inc ebp |
||
1265 | inc ebp |
||
1266 | mov ecx, 3 |
||
1267 | push ecx |
||
1268 | @@: |
||
1269 | mov al, [edi] |
||
1270 | inc edi |
||
1271 | call ansi2uni_char |
||
1272 | mov [ebp], ax |
||
1273 | inc ebp |
||
1274 | inc ebp |
||
1275 | loop @b |
||
1276 | pop ecx |
||
1277 | @@: |
||
1278 | cmp word [ebp-2], ' ' |
||
1279 | jnz @f |
||
1280 | dec ebp |
||
1281 | dec ebp |
||
1282 | loop @b |
||
1283 | dec ebp |
||
1284 | dec ebp |
||
1285 | @@: |
||
1286 | and word [ebp], 0 ; CF=0 |
||
1287 | pop ebp edi ecx |
||
1288 | ret |
||
1289 | .longname: |
||
1290 | ; LFN |
||
1291 | mov al, byte [edi] |
||
1292 | and eax, 0x3F |
||
1293 | dec eax |
||
1294 | cmp al, 20 |
||
1295 | jae .no ; ignore invalid entries |
||
1296 | mov word [ebp+260*2], 0 ; force null-terminating for orphans |
||
1297 | imul eax, 13*2 |
||
1298 | add ebp, eax |
||
1299 | test byte [edi], 0x40 |
||
1300 | jz @f |
||
1301 | mov word [ebp+13*2], 0 |
||
1302 | @@: |
||
1303 | push eax |
||
1304 | ; now copy name from edi to ebp ... |
||
1305 | mov eax, [edi+1] |
||
1306 | mov [ebp], eax ; symbols 1,2 |
||
1307 | mov eax, [edi+5] |
||
1308 | mov [ebp+4], eax ; 3,4 |
||
1309 | mov eax, [edi+9] |
||
1310 | mov [ebp+8], ax ; 5 |
||
1311 | mov eax, [edi+14] |
||
1312 | mov [ebp+10], eax ; 6,7 |
||
1313 | mov eax, [edi+18] |
||
1314 | mov [ebp+14], eax ; 8,9 |
||
1315 | mov eax, [edi+22] |
||
1316 | mov [ebp+18], eax ; 10,11 |
||
1317 | mov eax, [edi+28] |
||
1318 | mov [ebp+22], eax ; 12,13 |
||
1319 | ; ... done |
||
1320 | pop eax |
||
1321 | sub ebp, eax |
||
1322 | test eax, eax |
||
1323 | jz @f |
||
1324 | ; if this is not first entry, more processing required |
||
1325 | stc |
||
1326 | ret |
||
1327 | @@: |
||
1328 | ; if this is first entry: |
||
1329 | test byte [ebp-4], 1 |
||
1330 | jnz .ret |
||
1331 | ; buffer at ebp contains UNICODE name, convert it to ANSI |
||
1332 | push esi edi |
||
1333 | mov esi, ebp |
||
1334 | mov edi, ebp |
||
1335 | call uni2ansi_str |
||
1336 | pop edi esi |
||
1337 | .ret: |
||
1338 | clc |
||
1339 | ret |
||
1340 | |||
1341 | fat_compare_name: |
||
1342 | ; compares ASCIIZ-names, case-insensitive (cp866 encoding) |
||
1343 | ; in: esi->name, ebp->name |
||
1344 | ; out: if names match: ZF=1 and esi->next component of name |
||
1345 | ; else: ZF=0, esi is not changed |
||
1346 | ; destroys eax |
||
1347 | push ebp esi |
||
1348 | .loop: |
||
1349 | mov al, [ebp] |
||
1350 | inc ebp |
||
1351 | call char_toupper |
||
1352 | push eax |
||
1353 | lodsb |
||
1354 | call char_toupper |
||
1355 | cmp al, [esp] |
||
1356 | jnz .done |
||
1357 | pop eax |
||
1358 | test al, al |
||
1359 | jnz .loop |
||
1360 | dec esi |
||
1361 | pop eax |
||
1362 | pop ebp |
||
1363 | xor eax, eax ; set ZF flag |
||
1364 | ret |
||
1365 | .done: |
||
1366 | cmp al, '/' |
||
1367 | jnz @f |
||
1368 | cmp byte [esp], 0 |
||
1369 | jnz @f |
||
1370 | mov [esp+4], esi |
||
1371 | @@: |
||
1372 | pop eax |
||
1373 | pop esi ebp |
||
1374 | ret |
||
1375 | |||
1376 | fat_find_lfn: |
||
1377 | ; in: esi->name |
||
1378 | ; [esp+4] = next |
||
1379 | ; [esp+8] = first |
||
1380 | ; [esp+C]... - possibly parameters for first and next |
||
1381 | ; out: CF=1 - file not found, eax=error code |
||
1382 | ; else CF=0, esi->next name component, edi->direntry |
||
1383 | pusha |
||
1384 | lea eax, [esp+0Ch+20h] |
||
1385 | call dword [eax-4] |
||
1386 | jc .reterr |
||
1387 | sub esp, 262*2 ; reserve place for LFN |
||
1388 | push 0 ; for fat_get_name: read ASCII name |
||
1389 | .l1: |
||
1390 | lea ebp, [esp+4] |
||
1391 | call fat_get_name |
||
1392 | jc .l2 |
||
1393 | call fat_compare_name |
||
1394 | jz .found |
||
1395 | .l2: |
||
1396 | mov ebp, [esp+8+262*2+4] |
||
1397 | lea eax, [esp+0Ch+20h+262*2+4] |
||
1398 | call dword [eax-8] |
||
1399 | jnc .l1 |
||
1400 | add esp, 262*2+4 |
||
1401 | .reterr: |
||
1402 | mov [esp+28], eax |
||
1403 | stc |
||
1404 | popa |
||
1405 | ret |
||
1406 | .found: |
||
1407 | add esp, 262*2+4 |
||
1408 | mov ebp, [esp+8] |
||
1409 | ; if this is LFN entry, advance to true entry |
||
1410 | cmp byte [edi+11], 0xF |
||
1411 | jnz @f |
||
1412 | lea eax, [esp+0Ch+20h] |
||
1413 | call dword [eax-8] |
||
1414 | jc .reterr |
||
1415 | @@: |
||
1416 | add esp, 8 ; CF=0 |
||
1417 | push esi |
||
1418 | push edi |
||
1419 | popa |
||
1420 | ret |
||
1421 | |||
1422 | fat_time_to_bdfe: |
||
1423 | ; in: eax=FAT time |
||
1424 | ; out: eax=BDFE time |
||
1425 | push ecx edx |
||
1426 | mov ecx, eax |
||
1427 | mov edx, eax |
||
1428 | shr eax, 11 |
||
1429 | shl eax, 16 ; hours |
||
1430 | and edx, 0x1F |
||
1431 | add edx, edx |
||
1432 | mov al, dl ; seconds |
||
1433 | shr ecx, 5 |
||
1434 | and ecx, 0x3F |
||
1435 | mov ah, cl ; minutes |
||
1436 | pop edx ecx |
||
1437 | ret |
||
1438 | |||
1439 | fat_date_to_bdfe: |
||
1440 | push ecx edx |
||
1441 | mov ecx, eax |
||
1442 | mov edx, eax |
||
1443 | shr eax, 9 |
||
1444 | add ax, 1980 |
||
1445 | shl eax, 16 ; year |
||
1446 | and edx, 0x1F |
||
1447 | mov al, dl ; day |
||
1448 | shr ecx, 5 |
||
1449 | and ecx, 0xF |
||
1450 | mov ah, cl ; month |
||
1451 | pop edx ecx |
||
1452 | ret |
||
1453 | |||
1454 | bdfe_to_fat_time: |
||
1455 | push edx |
||
1456 | mov edx, eax |
||
1457 | shr eax, 16 |
||
1458 | and dh, 0x3F |
||
1459 | shl eax, 6 |
||
1460 | or al, dh |
||
1461 | shr dl, 1 |
||
1462 | and dl, 0x1F |
||
1463 | shl eax, 5 |
||
1464 | or al, dl |
||
1465 | pop edx |
||
1466 | ret |
||
1467 | |||
1468 | bdfe_to_fat_date: |
||
1469 | push edx |
||
1470 | mov edx, eax |
||
1471 | shr eax, 16 |
||
1472 | sub ax, 1980 |
||
1473 | and dh, 0xF |
||
1474 | shl eax, 4 |
||
1475 | or al, dh |
||
1476 | and dl, 0x1F |
||
1477 | shl eax, 5 |
||
1478 | or al, dl |
||
1479 | pop edx |
||
1480 | ret |
||
1481 | |||
1482 | fat_entry_to_bdfe: |
||
1483 | ; convert FAT entry at edi to BDFE (block of data of folder entry) at esi, advance esi |
||
1484 | ; destroys eax |
||
1485 | mov eax, [ebp-4] |
||
1486 | mov [esi+4], eax ; ASCII/UNICODE name |
||
1487 | fat_entry_to_bdfe2: |
||
1488 | movzx eax, byte [edi+11] |
||
1489 | mov [esi], eax ; attributes |
||
1490 | movzx eax, word [edi+14] |
||
1491 | call fat_time_to_bdfe |
||
1492 | mov [esi+8], eax ; creation time |
||
1493 | movzx eax, word [edi+16] |
||
1494 | call fat_date_to_bdfe |
||
1495 | mov [esi+12], eax ; creation date |
||
1496 | and dword [esi+16], 0 ; last access time is not supported on FAT |
||
1497 | movzx eax, word [edi+18] |
||
1498 | call fat_date_to_bdfe |
||
1499 | mov [esi+20], eax ; last access date |
||
1500 | movzx eax, word [edi+22] |
||
1501 | call fat_time_to_bdfe |
||
1502 | mov [esi+24], eax ; last write time |
||
1503 | movzx eax, word [edi+24] |
||
1504 | call fat_date_to_bdfe |
||
1505 | mov [esi+28], eax ; last write date |
||
1506 | mov eax, [edi+28] |
||
1507 | mov [esi+32], eax ; file size (low dword) |
||
1508 | xor eax, eax |
||
1509 | mov [esi+36], eax ; file size (high dword) |
||
1510 | test ebp, ebp |
||
1511 | jz .ret |
||
1512 | push ecx edi |
||
1513 | lea edi, [esi+40] |
||
1514 | mov esi, ebp |
||
1515 | test byte [esi-4], 1 |
||
1516 | jz .ansi |
||
1517 | mov ecx, 260/2 |
||
1518 | rep movsd |
||
1519 | mov [edi-2], ax |
||
1520 | @@: |
||
1521 | mov esi, edi |
||
1522 | pop edi ecx |
||
1523 | .ret: |
||
1524 | ret |
||
1525 | .ansi: |
||
1526 | mov ecx, 264/4 |
||
1527 | rep movsd |
||
1528 | mov [edi-1], al |
||
1529 | jmp @b |
||
1530 | |||
1531 | bdfe_to_fat_entry: |
||
1532 | ; convert BDFE at edx to FAT entry at edi |
||
1533 | ; destroys eax |
||
1534 | ; attributes byte |
||
1535 | test byte [edi+11], 8 ; volume label? |
||
1536 | jnz @f |
||
1537 | mov al, [edx] |
||
1538 | and al, 0x27 |
||
1539 | and byte [edi+11], 0x10 |
||
1540 | or byte [edi+11], al |
||
1541 | @@: |
||
1542 | mov eax, [edx+8] |
||
1543 | call bdfe_to_fat_time |
||
1544 | mov [edi+14], ax ; creation time |
||
1545 | mov eax, [edx+12] |
||
1546 | call bdfe_to_fat_date |
||
1547 | mov [edi+16], ax ; creation date |
||
1548 | mov eax, [edx+20] |
||
1549 | call bdfe_to_fat_date |
||
1550 | mov [edi+18], ax ; last access date |
||
1551 | mov eax, [edx+24] |
||
1552 | call bdfe_to_fat_time |
||
1553 | mov [edi+22], ax ; last write time |
||
1554 | mov eax, [edx+28] |
||
1555 | call bdfe_to_fat_date |
||
1556 | mov [edi+24], ax ; last write date |
||
1557 | ret |
||
1558 | |||
2288 | clevermous | 1559 | hd_find_lfn: |
6468 | pathoswith | 1560 | ; in: esi -> path string |
2643 | clevermous | 1561 | ; out: CF=1 - file not found, eax=error code |
2288 | clevermous | 1562 | ; else CF=0 and edi->direntry, eax=sector |
1563 | push esi edi |
||
1564 | push 0 |
||
1565 | push 0 |
||
4273 | clevermous | 1566 | push fat1x_root_first |
1567 | push fat1x_root_next |
||
2643 | clevermous | 1568 | mov eax, [ebp+FAT.ROOT_CLUSTER] |
1569 | cmp [ebp+FAT.fs_type], 32 |
||
2288 | clevermous | 1570 | jz .fat32 |
1571 | .loop: |
||
4273 | clevermous | 1572 | and [ebp+FAT.longname_sec1], 0 |
1573 | and [ebp+FAT.longname_sec2], 0 |
||
2288 | clevermous | 1574 | call fat_find_lfn |
1575 | jc .notfound |
||
1576 | cmp byte [esi], 0 |
||
1577 | jz .found |
||
1578 | test byte [edi+11], 10h |
||
1579 | jz .notfound |
||
1580 | and dword [esp+12], 0 |
||
1581 | mov eax, [edi+20-2] |
||
1582 | mov ax, [edi+26] ; cluster |
||
1583 | .fat32: |
||
1584 | mov [esp+8], eax |
||
1585 | mov dword [esp+4], fat_notroot_first |
||
1586 | mov dword [esp], fat_notroot_next |
||
1587 | jmp .loop |
||
6468 | pathoswith | 1588 | |
2288 | clevermous | 1589 | .notfound: |
1590 | add esp, 16 |
||
1591 | pop edi esi |
||
1592 | stc |
||
6468 | pathoswith | 1593 | ret |
1594 | |||
2288 | clevermous | 1595 | .found: |
1596 | lea eax, [esp+8] |
||
1597 | cmp dword [eax], 0 |
||
1598 | jz .root |
||
1599 | call fat_get_sector |
||
1600 | jmp .cmn |
||
6468 | pathoswith | 1601 | |
2288 | clevermous | 1602 | .root: |
1603 | mov eax, [eax+4] |
||
2643 | clevermous | 1604 | add eax, [ebp+FAT.ROOT_START] |
2288 | clevermous | 1605 | .cmn: |
1606 | add esp, 20 ; CF=0 |
||
1607 | pop esi |
||
6468 | pathoswith | 1608 | ret |
2288 | clevermous | 1609 | |
1610 | ;---------------------------------------------------------------- |
||
2643 | clevermous | 1611 | fat_Read: |
1612 | call fat_lock |
||
2288 | clevermous | 1613 | push edi |
1614 | cmp byte [esi], 0 |
||
1615 | jnz @f |
||
1616 | .noaccess: |
||
1617 | pop edi |
||
2643 | clevermous | 1618 | call fat_unlock |
2288 | clevermous | 1619 | or ebx, -1 |
1620 | mov eax, ERROR_ACCESS_DENIED |
||
1621 | ret |
||
1622 | @@: |
||
6468 | pathoswith | 1623 | call hd_find_lfn |
2288 | clevermous | 1624 | jnc .found |
1625 | pop edi |
||
2643 | clevermous | 1626 | push eax |
1627 | call fat_unlock |
||
1628 | pop eax |
||
2288 | clevermous | 1629 | or ebx, -1 |
1630 | ret |
||
1631 | .found: |
||
5578 | Pathoswith | 1632 | test byte [edi+11], 0x10 ; do not allow read directories |
2288 | clevermous | 1633 | jnz .noaccess |
2643 | clevermous | 1634 | cmp dword [ebx+8], 0 |
2288 | clevermous | 1635 | jz @f |
1636 | xor ebx, ebx |
||
2643 | clevermous | 1637 | call fat_unlock |
1638 | mov eax, ERROR_END_OF_FILE |
||
2288 | clevermous | 1639 | pop edi |
1640 | ret |
||
1641 | @@: |
||
5578 | Pathoswith | 1642 | mov edx, [ebx+4] ; file offset |
2643 | clevermous | 1643 | mov ecx, [ebx+12] ; size |
5578 | Pathoswith | 1644 | mov ebx, [ebx+16] ; buffer |
1645 | push ebx |
||
2288 | clevermous | 1646 | push 0 |
6037 | pathoswith | 1647 | test ecx, ecx |
1648 | jz .done |
||
2288 | clevermous | 1649 | mov eax, [edi+28] |
5578 | Pathoswith | 1650 | sub eax, edx |
1651 | jb .fileEnd |
||
2288 | clevermous | 1652 | cmp eax, ecx |
1653 | jae @f |
||
1654 | mov ecx, eax |
||
1655 | mov byte [esp], 6 |
||
1656 | @@: |
||
1657 | mov eax, [edi+20-2] |
||
1658 | mov ax, [edi+26] |
||
5578 | Pathoswith | 1659 | ; now eax=cluster, ebx=buffer for data, ecx=count, edx=position |
1660 | mov edi, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
1661 | shl edi, 9 |
||
1662 | @@: |
||
2643 | clevermous | 1663 | cmp eax, 2 |
5578 | Pathoswith | 1664 | jb .fileEnd |
2643 | clevermous | 1665 | cmp eax, [ebp+FAT.fatRESERVED] |
5578 | Pathoswith | 1666 | jae .fileEnd |
1667 | sub edx, edi |
||
1668 | jc @f |
||
1669 | call get_FAT |
||
1670 | jc .noaccess2 |
||
1671 | jmp @b |
||
1672 | @@: |
||
1673 | mov esi, eax |
||
2288 | clevermous | 1674 | dec eax |
1675 | dec eax |
||
5578 | Pathoswith | 1676 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2643 | clevermous | 1677 | add eax, [ebp+FAT.DATA_START] |
5578 | Pathoswith | 1678 | add edx, edi |
1679 | jz .alignedCluster |
||
1680 | mov edi, edx |
||
1681 | shr edi, 9 |
||
1682 | add eax, edi |
||
1683 | and edx, 511 |
||
5840 | pathoswith | 1684 | cmp ecx, 512 |
1685 | jc .sectorPiece |
||
1686 | test edx, edx |
||
5578 | Pathoswith | 1687 | jz .alignedSector |
1688 | .sectorPiece: |
||
2643 | clevermous | 1689 | push eax ebx |
1690 | lea ebx, [ebp+FAT.buffer] |
||
1691 | call fs_read32_app |
||
1692 | test eax, eax |
||
2288 | clevermous | 1693 | mov eax, ebx |
1694 | pop ebx |
||
5578 | Pathoswith | 1695 | jne .noaccess3 |
1696 | add eax, edx |
||
2288 | clevermous | 1697 | push ecx |
5578 | Pathoswith | 1698 | add ecx, edx |
2288 | clevermous | 1699 | cmp ecx, 512 |
1700 | jbe @f |
||
1701 | mov ecx, 512 |
||
1702 | @@: |
||
5578 | Pathoswith | 1703 | sub ecx, edx |
2288 | clevermous | 1704 | call memmove |
1705 | sub [esp], ecx |
||
5578 | Pathoswith | 1706 | add ebx, ecx |
1707 | pop ecx eax |
||
1708 | xor edx, edx |
||
1709 | inc edi |
||
2288 | clevermous | 1710 | inc eax |
5578 | Pathoswith | 1711 | test ecx, ecx |
1712 | jz .done |
||
1713 | .alignedSector: |
||
1714 | shl edi, 9 |
||
1715 | add ecx, edi |
||
1716 | mov edi, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
1717 | shl edi, 9 |
||
1718 | .alignedCluster: |
||
1719 | cmp ecx, 512 |
||
1720 | jc .sectorPiece |
||
1721 | mov edx, eax |
||
1722 | mov eax, esi |
||
1723 | @@: |
||
1724 | sub ecx, edi |
||
1725 | jbe .readEnd |
||
2288 | clevermous | 1726 | call get_FAT |
5578 | Pathoswith | 1727 | jc .noaccess4 |
1728 | cmp eax, 2 |
||
1729 | jb .fileEnd2 |
||
1730 | cmp eax, [ebp+FAT.fatRESERVED] |
||
1731 | jae .fileEnd2 |
||
1732 | inc esi |
||
1733 | cmp eax, esi |
||
1734 | jz @b |
||
1735 | .fragmentEnd: |
||
1736 | xchg eax, esi |
||
1737 | dec eax |
||
1738 | dec eax |
||
1739 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
1740 | add eax, [ebp+FAT.DATA_START] |
||
1741 | push ecx |
||
1742 | mov ecx, eax |
||
5840 | pathoswith | 1743 | mov eax, esi |
1744 | dec eax |
||
1745 | dec eax |
||
1746 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
1747 | add eax, [ebp+FAT.DATA_START] |
||
1748 | push eax |
||
1749 | .readFragment: |
||
1750 | sub ecx, edx |
||
5578 | Pathoswith | 1751 | mov eax, edx |
1752 | xor edx, edx |
||
1753 | call fs_read64_app |
||
1754 | shl ecx, 9 |
||
1755 | add ebx, ecx |
||
1756 | test eax, eax |
||
2288 | clevermous | 1757 | pop eax |
5578 | Pathoswith | 1758 | jnz .noaccess3 |
1759 | pop ecx |
||
1760 | xor edx, edx |
||
6036 | pathoswith | 1761 | jecxz .done |
5578 | Pathoswith | 1762 | jmp .alignedCluster |
1763 | .readEnd: |
||
1764 | add ecx, edi |
||
1765 | mov edi, ecx |
||
1766 | and ecx, 511 |
||
1767 | shr edi, 9 |
||
1768 | dec eax |
||
1769 | dec eax |
||
1770 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
1771 | add eax, [ebp+FAT.DATA_START] |
||
1772 | add eax, edi |
||
5840 | pathoswith | 1773 | push ecx |
1774 | push eax |
||
1775 | mov ecx, eax |
||
5578 | Pathoswith | 1776 | jmp .readFragment |
1777 | .noaccess3: |
||
2288 | clevermous | 1778 | pop eax |
5578 | Pathoswith | 1779 | .noaccess2: |
1780 | mov byte [esp], ERROR_DEVICE |
||
2288 | clevermous | 1781 | .done: |
2643 | clevermous | 1782 | call fat_unlock |
1783 | pop eax edx edi |
||
2288 | clevermous | 1784 | sub ebx, edx |
1785 | ret |
||
5578 | Pathoswith | 1786 | .fileEnd: |
1787 | mov byte [esp], ERROR_END_OF_FILE |
||
1788 | jmp .done |
||
1789 | .noaccess4: |
||
1790 | mov byte [esp], ERROR_DEVICE |
||
1791 | jmp @f |
||
1792 | .fileEnd2: |
||
1793 | mov byte [esp], ERROR_END_OF_FILE |
||
1794 | @@: |
||
1795 | inc esi |
||
1796 | xor ecx, ecx |
||
1797 | jmp .fragmentEnd |
||
2288 | clevermous | 1798 | |
1799 | ;---------------------------------------------------------------- |
||
2643 | clevermous | 1800 | fat_ReadFolder: |
1801 | call fat_lock |
||
1802 | mov eax, [ebp+FAT.ROOT_CLUSTER] |
||
2288 | clevermous | 1803 | push edi |
1804 | cmp byte [esi], 0 |
||
1805 | jz .doit |
||
6468 | pathoswith | 1806 | call hd_find_lfn |
2288 | clevermous | 1807 | jnc .found |
1808 | pop edi |
||
2643 | clevermous | 1809 | push eax |
1810 | call fat_unlock |
||
1811 | pop eax |
||
2288 | clevermous | 1812 | or ebx, -1 |
1813 | ret |
||
1814 | .found: |
||
1815 | test byte [edi+11], 0x10 ; do not allow read files |
||
1816 | jnz .found_dir |
||
1817 | pop edi |
||
2643 | clevermous | 1818 | call fat_unlock |
2288 | clevermous | 1819 | or ebx, -1 |
1820 | mov eax, ERROR_ACCESS_DENIED |
||
1821 | ret |
||
1822 | .found_dir: |
||
1823 | mov eax, [edi+20-2] |
||
1824 | mov ax, [edi+26] ; eax=cluster |
||
1825 | .doit: |
||
2643 | clevermous | 1826 | push esi |
2288 | clevermous | 1827 | sub esp, 262*2 ; reserve space for LFN |
2643 | clevermous | 1828 | push dword [ebx+8] ; for fat_get_name: read ANSI/UNICODE name |
1829 | mov edx, [ebx+16] ; pointer to buffer |
||
2288 | clevermous | 1830 | ; init header |
2643 | clevermous | 1831 | push eax |
2288 | clevermous | 1832 | mov edi, edx |
1833 | mov ecx, 32/4 |
||
1834 | xor eax, eax |
||
1835 | rep stosd |
||
2643 | clevermous | 1836 | pop eax |
2288 | clevermous | 1837 | mov byte [edx], 1 ; version |
1838 | mov esi, edi ; esi points to BDFE |
||
2643 | clevermous | 1839 | mov ecx, [ebx+12] ; number of blocks to read |
1840 | mov ebx, [ebx+4] ; index of the first block |
||
2288 | clevermous | 1841 | .new_cluster: |
2643 | clevermous | 1842 | mov [ebp+FAT.cluster_tmp], eax |
2288 | clevermous | 1843 | test eax, eax |
1844 | jnz @f |
||
2643 | clevermous | 1845 | cmp [ebp+FAT.fs_type], 32 |
2288 | clevermous | 1846 | jz .notfound |
2643 | clevermous | 1847 | mov eax, [ebp+FAT.ROOT_START] |
1848 | push [ebp+FAT.ROOT_SECTORS] |
||
2288 | clevermous | 1849 | push ebx |
1850 | jmp .new_sector |
||
1851 | @@: |
||
1852 | dec eax |
||
1853 | dec eax |
||
2643 | clevermous | 1854 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
1855 | push [ebp+FAT.SECTORS_PER_CLUSTER] |
||
1856 | add eax, [ebp+FAT.DATA_START] |
||
2288 | clevermous | 1857 | push ebx |
1858 | .new_sector: |
||
2643 | clevermous | 1859 | lea ebx, [ebp+FAT.buffer] |
2288 | clevermous | 1860 | mov edi, ebx |
2643 | clevermous | 1861 | push eax |
1862 | call fs_read32_sys |
||
1863 | test eax, eax |
||
1864 | pop eax |
||
2288 | clevermous | 1865 | jnz .notfound2 |
1866 | add ebx, 512 |
||
1867 | push eax |
||
1868 | .l1: |
||
2643 | clevermous | 1869 | push ebp |
1870 | lea ebp, [esp+20] |
||
2288 | clevermous | 1871 | call fat_get_name |
2643 | clevermous | 1872 | pop ebp |
2288 | clevermous | 1873 | jc .l2 |
1874 | cmp byte [edi+11], 0xF |
||
1875 | jnz .do_bdfe |
||
1876 | add edi, 0x20 |
||
1877 | cmp edi, ebx |
||
1878 | jb .do_bdfe |
||
1879 | pop eax |
||
1880 | inc eax |
||
1881 | dec dword [esp+4] |
||
1882 | jnz @f |
||
2643 | clevermous | 1883 | mov eax, [ebp+FAT.cluster_tmp] |
2288 | clevermous | 1884 | test eax, eax |
1885 | jz .done |
||
1886 | call get_FAT |
||
2643 | clevermous | 1887 | jc .notfound2 |
2288 | clevermous | 1888 | cmp eax, 2 |
1889 | jb .done |
||
2643 | clevermous | 1890 | cmp eax, [ebp+FAT.fatRESERVED] |
2288 | clevermous | 1891 | jae .done |
1892 | push eax |
||
2643 | clevermous | 1893 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 1894 | mov [esp+8], eax |
1895 | pop eax |
||
2643 | clevermous | 1896 | mov [ebp+FAT.cluster_tmp], eax |
2288 | clevermous | 1897 | dec eax |
1898 | dec eax |
||
2643 | clevermous | 1899 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
1900 | add eax, [ebp+FAT.DATA_START] |
||
2288 | clevermous | 1901 | @@: |
2643 | clevermous | 1902 | lea ebx, [ebp+FAT.buffer] |
2288 | clevermous | 1903 | mov edi, ebx |
2643 | clevermous | 1904 | push eax |
1905 | call fs_read32_sys |
||
1906 | test eax, eax |
||
1907 | pop eax |
||
2288 | clevermous | 1908 | jnz .notfound2 |
1909 | add ebx, 512 |
||
1910 | push eax |
||
1911 | .do_bdfe: |
||
1912 | inc dword [edx+8] ; new file found |
||
1913 | dec dword [esp+4] |
||
1914 | jns .l2 |
||
1915 | dec ecx |
||
1916 | js .l2 |
||
1917 | inc dword [edx+4] ; new file block copied |
||
2643 | clevermous | 1918 | push ebp |
1919 | lea ebp, [esp+20] |
||
2288 | clevermous | 1920 | call fat_entry_to_bdfe |
2643 | clevermous | 1921 | pop ebp |
2288 | clevermous | 1922 | .l2: |
1923 | add edi, 0x20 |
||
1924 | cmp edi, ebx |
||
1925 | jb .l1 |
||
1926 | pop eax |
||
1927 | inc eax |
||
1928 | dec dword [esp+4] |
||
1929 | jnz .new_sector |
||
2643 | clevermous | 1930 | mov eax, [ebp+FAT.cluster_tmp] |
2288 | clevermous | 1931 | test eax, eax |
1932 | jz .done |
||
1933 | call get_FAT |
||
2643 | clevermous | 1934 | jc .notfound2 |
2288 | clevermous | 1935 | cmp eax, 2 |
1936 | jb .done |
||
2643 | clevermous | 1937 | cmp eax, [ebp+FAT.fatRESERVED] |
2288 | clevermous | 1938 | jae .done |
1939 | push eax |
||
2643 | clevermous | 1940 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 1941 | mov [esp+8], eax |
1942 | pop eax |
||
1943 | pop ebx |
||
1944 | add esp, 4 |
||
1945 | jmp .new_cluster |
||
1946 | .notfound2: |
||
1947 | add esp, 8 |
||
1948 | .notfound: |
||
1949 | add esp, 262*2+4 |
||
2643 | clevermous | 1950 | pop esi edi |
1951 | mov ebx, [edx+4] |
||
1952 | call fat_unlock |
||
1953 | mov eax, ERROR_DEVICE |
||
2288 | clevermous | 1954 | ret |
1955 | .done: |
||
1956 | add esp, 262*2+4+8 |
||
1957 | mov ebx, [edx+4] |
||
1958 | xor eax, eax |
||
1959 | dec ecx |
||
1960 | js @f |
||
1961 | mov al, ERROR_END_OF_FILE |
||
1962 | @@: |
||
2643 | clevermous | 1963 | push eax |
1964 | call fat_unlock |
||
1965 | pop eax |
||
1966 | pop esi edi |
||
2288 | clevermous | 1967 | ret |
1968 | |||
4273 | clevermous | 1969 | fat1x_root_next: |
2643 | clevermous | 1970 | push ecx |
1971 | lea ecx, [ebp+FAT.buffer+0x200-0x20] |
||
1972 | cmp edi, ecx |
||
4273 | clevermous | 1973 | jae fat1x_root_next_sector |
2643 | clevermous | 1974 | pop ecx |
2288 | clevermous | 1975 | add edi, 0x20 |
1976 | ret ; CF=0 |
||
4273 | clevermous | 1977 | fat1x_root_next_sector: |
2288 | clevermous | 1978 | ; read next sector |
2643 | clevermous | 1979 | push [ebp+FAT.longname_sec2] |
1980 | pop [ebp+FAT.longname_sec1] |
||
2288 | clevermous | 1981 | mov ecx, [eax+4] |
1982 | push ecx |
||
2643 | clevermous | 1983 | add ecx, [ebp+FAT.ROOT_START] |
1984 | mov [ebp+FAT.longname_sec2], ecx |
||
2288 | clevermous | 1985 | pop ecx |
1986 | inc ecx |
||
1987 | mov [eax+4], ecx |
||
2643 | clevermous | 1988 | cmp ecx, [ebp+FAT.ROOT_SECTORS] |
2288 | clevermous | 1989 | pop ecx |
4273 | clevermous | 1990 | jb fat1x_root_first |
2643 | clevermous | 1991 | mov eax, ERROR_FILE_NOT_FOUND |
1992 | stc |
||
1993 | ret |
||
4273 | clevermous | 1994 | fat1x_root_first: |
2288 | clevermous | 1995 | mov eax, [eax+4] |
2643 | clevermous | 1996 | add eax, [ebp+FAT.ROOT_START] |
2288 | clevermous | 1997 | push ebx |
2643 | clevermous | 1998 | lea edi, [ebp+FAT.buffer] |
2288 | clevermous | 1999 | mov ebx, edi |
2643 | clevermous | 2000 | call fs_read32_sys |
2288 | clevermous | 2001 | pop ebx |
2643 | clevermous | 2002 | test eax, eax |
2288 | clevermous | 2003 | jnz .readerr |
2004 | ret ; CF=0 |
||
2005 | .readerr: |
||
2643 | clevermous | 2006 | mov eax, ERROR_DEVICE |
2288 | clevermous | 2007 | stc |
2008 | ret |
||
2643 | clevermous | 2009 | .notfound: |
2010 | mov eax, ERROR_FILE_NOT_FOUND |
||
2011 | stc |
||
2012 | ret |
||
4273 | clevermous | 2013 | fat1x_root_begin_write: |
2288 | clevermous | 2014 | push edi eax |
4273 | clevermous | 2015 | call fat1x_root_first |
2288 | clevermous | 2016 | pop eax edi |
2017 | ret |
||
4273 | clevermous | 2018 | fat1x_root_end_write: |
2288 | clevermous | 2019 | pusha |
2020 | mov eax, [eax+4] |
||
2643 | clevermous | 2021 | add eax, [ebp+FAT.ROOT_START] |
2022 | lea ebx, [ebp+FAT.buffer] |
||
2023 | call fs_write32_sys |
||
2288 | clevermous | 2024 | popa |
2025 | ret |
||
4273 | clevermous | 2026 | fat1x_root_next_write: |
2643 | clevermous | 2027 | push ecx |
2028 | lea ecx, [ebp+FAT.buffer+0x200] |
||
2029 | cmp edi, ecx |
||
2288 | clevermous | 2030 | jae @f |
2643 | clevermous | 2031 | pop ecx |
2288 | clevermous | 2032 | ret |
2033 | @@: |
||
4273 | clevermous | 2034 | call fat1x_root_end_write |
2035 | jmp fat1x_root_next_sector |
||
2036 | fat1x_root_extend_dir: |
||
2288 | clevermous | 2037 | stc |
2038 | ret |
||
2039 | |||
2040 | fat_notroot_next: |
||
2643 | clevermous | 2041 | push ecx |
2042 | lea ecx, [ebp+FAT.buffer+0x200-0x20] |
||
2043 | cmp edi, ecx |
||
2288 | clevermous | 2044 | jae fat_notroot_next_sector |
2643 | clevermous | 2045 | pop ecx |
2288 | clevermous | 2046 | add edi, 0x20 |
2047 | ret ; CF=0 |
||
2048 | fat_notroot_next_sector: |
||
2643 | clevermous | 2049 | push [ebp+FAT.longname_sec2] |
2050 | pop [ebp+FAT.longname_sec1] |
||
2288 | clevermous | 2051 | push eax |
2052 | call fat_get_sector |
||
2643 | clevermous | 2053 | mov [ebp+FAT.longname_sec2], eax |
2288 | clevermous | 2054 | pop eax |
2055 | mov ecx, [eax+4] |
||
2056 | inc ecx |
||
2643 | clevermous | 2057 | cmp ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 2058 | jae fat_notroot_next_cluster |
2059 | mov [eax+4], ecx |
||
2060 | jmp @f |
||
2061 | fat_notroot_next_cluster: |
||
2062 | push eax |
||
2063 | mov eax, [eax] |
||
2064 | call get_FAT |
||
2065 | mov ecx, eax |
||
2066 | pop eax |
||
2643 | clevermous | 2067 | jc fat_notroot_first.deverr |
2068 | cmp ecx, 2 |
||
2069 | jb fat_notroot_next_err |
||
2070 | cmp ecx, [ebp+FAT.fatRESERVED] |
||
2288 | clevermous | 2071 | jae fat_notroot_next_err |
2072 | mov [eax], ecx |
||
2073 | and dword [eax+4], 0 |
||
2074 | @@: |
||
2075 | pop ecx |
||
2076 | fat_notroot_first: |
||
2077 | call fat_get_sector |
||
2078 | push ebx |
||
2643 | clevermous | 2079 | lea edi, [ebp+FAT.buffer] |
2288 | clevermous | 2080 | mov ebx, edi |
2643 | clevermous | 2081 | call fs_read32_sys |
2288 | clevermous | 2082 | pop ebx |
2643 | clevermous | 2083 | test eax, eax |
2084 | jz .ret ; CF=0 |
||
2085 | push ecx |
||
2086 | .deverr: |
||
2087 | pop ecx |
||
2088 | mov eax, ERROR_DEVICE |
||
2089 | stc |
||
2090 | .ret: |
||
2091 | ret |
||
2288 | clevermous | 2092 | fat_notroot_next_err: |
2093 | pop ecx |
||
2643 | clevermous | 2094 | mov eax, ERROR_FILE_NOT_FOUND |
2288 | clevermous | 2095 | stc |
2096 | ret |
||
2097 | fat_notroot_begin_write: |
||
2098 | push eax edi |
||
2099 | call fat_notroot_first |
||
2100 | pop edi eax |
||
2101 | ret |
||
2102 | fat_notroot_end_write: |
||
2103 | call fat_get_sector |
||
2104 | push ebx |
||
2643 | clevermous | 2105 | lea ebx, [ebp+FAT.buffer] |
2106 | call fs_write32_sys |
||
2288 | clevermous | 2107 | pop ebx |
2108 | ret |
||
2109 | fat_notroot_next_write: |
||
2643 | clevermous | 2110 | push ecx |
2111 | lea ecx, [ebp+FAT.buffer+0x200] |
||
2112 | cmp edi, ecx |
||
2288 | clevermous | 2113 | jae @f |
2643 | clevermous | 2114 | pop ecx |
2288 | clevermous | 2115 | ret |
2116 | @@: |
||
2117 | push eax |
||
2118 | call fat_notroot_end_write |
||
2119 | pop eax |
||
2120 | jmp fat_notroot_next_sector |
||
2121 | fat_notroot_extend_dir: |
||
2122 | push eax |
||
2123 | call get_free_FAT |
||
2124 | jnc .found |
||
2125 | pop eax |
||
2126 | ret ; CF=1 |
||
2127 | .found: |
||
2128 | push edx |
||
2643 | clevermous | 2129 | mov edx, [ebp+FAT.fatEND] |
2288 | clevermous | 2130 | call set_FAT |
2643 | clevermous | 2131 | jc .writeerr |
2288 | clevermous | 2132 | mov edx, eax |
2133 | mov eax, [esp+4] |
||
2134 | mov eax, [eax] |
||
2135 | push edx |
||
2136 | call set_FAT |
||
2137 | pop edx |
||
2643 | clevermous | 2138 | jnc @f |
2139 | .writeerr: |
||
2288 | clevermous | 2140 | pop edx |
2141 | pop eax |
||
2142 | stc |
||
2143 | ret |
||
2144 | @@: |
||
2145 | push ecx |
||
2146 | or ecx, -1 |
||
2147 | call add_disk_free_space |
||
2148 | ; zero new cluster |
||
2149 | mov ecx, 512/4 |
||
2643 | clevermous | 2150 | lea edi, [ebp+FAT.buffer] |
2288 | clevermous | 2151 | push edi |
2152 | xor eax, eax |
||
2153 | rep stosd |
||
2154 | pop edi |
||
2155 | pop ecx |
||
2156 | mov eax, [esp+4] |
||
2157 | mov [eax], edx |
||
2158 | and dword [eax+4], 0 |
||
2159 | pop edx |
||
2160 | mov eax, [eax] |
||
2161 | dec eax |
||
2162 | dec eax |
||
2163 | push ebx ecx |
||
2643 | clevermous | 2164 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 2165 | imul eax, ecx |
2643 | clevermous | 2166 | add eax, [ebp+FAT.DATA_START] |
2288 | clevermous | 2167 | mov ebx, edi |
2168 | @@: |
||
2643 | clevermous | 2169 | push eax |
2170 | call fs_write32_sys |
||
2171 | pop eax |
||
2288 | clevermous | 2172 | inc eax |
2173 | loop @b |
||
2174 | pop ecx ebx eax |
||
2175 | clc |
||
2176 | ret |
||
2177 | |||
2178 | fat_get_sector: |
||
2179 | push ecx |
||
2180 | mov ecx, [eax] |
||
2181 | dec ecx |
||
2182 | dec ecx |
||
2643 | clevermous | 2183 | imul ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2184 | add ecx, [ebp+FAT.DATA_START] |
||
2288 | clevermous | 2185 | add ecx, [eax+4] |
2186 | mov eax, ecx |
||
2187 | pop ecx |
||
2188 | ret |
||
2189 | |||
2643 | clevermous | 2190 | fshrad: |
2191 | call fat_unlock |
||
2192 | mov eax, ERROR_ACCESS_DENIED |
||
2193 | xor ebx, ebx |
||
2194 | ret |
||
2195 | |||
2196 | ;---------------------------------------------------------------- |
||
2197 | fat_CreateFolder: |
||
2198 | push 1 |
||
6468 | pathoswith | 2199 | jmp @f |
2643 | clevermous | 2200 | |
6468 | pathoswith | 2201 | fat_CreateFile: |
2643 | clevermous | 2202 | push 0 |
6468 | pathoswith | 2203 | @@: |
2643 | clevermous | 2204 | call fat_lock |
2205 | pop eax |
||
2288 | clevermous | 2206 | cmp byte [esi], 0 |
2207 | jz fshrad |
||
2643 | clevermous | 2208 | mov ecx, [ebx+12] |
2209 | mov edx, [ebx+16] |
||
2288 | clevermous | 2210 | pushad |
2211 | xor edi, edi |
||
2212 | push esi |
||
2213 | @@: |
||
2214 | lodsb |
||
2215 | test al, al |
||
2216 | jz @f |
||
2217 | cmp al, '/' |
||
2218 | jnz @b |
||
2219 | lea edi, [esi-1] |
||
2220 | jmp @b |
||
6468 | pathoswith | 2221 | |
2288 | clevermous | 2222 | @@: |
2223 | pop esi |
||
2224 | test edi, edi |
||
2225 | jnz .noroot |
||
2643 | clevermous | 2226 | mov edx, [ebp+FAT.ROOT_CLUSTER] |
2227 | cmp [ebp+FAT.fs_type], 32 |
||
2288 | clevermous | 2228 | jz .pushnotroot |
2643 | clevermous | 2229 | xor edx, edx |
2230 | push edx |
||
4273 | clevermous | 2231 | push fat1x_root_extend_dir |
2232 | push fat1x_root_end_write |
||
2233 | push fat1x_root_next_write |
||
2234 | push fat1x_root_begin_write |
||
2643 | clevermous | 2235 | push edx |
2236 | push edx |
||
4273 | clevermous | 2237 | push fat1x_root_first |
2238 | push fat1x_root_next |
||
2288 | clevermous | 2239 | jmp .common1 |
6468 | pathoswith | 2240 | |
2288 | clevermous | 2241 | .noroot: |
2242 | mov eax, ERROR_ACCESS_DENIED |
||
2243 | cmp byte [edi+1], 0 |
||
2244 | jz .ret1 |
||
2245 | ; check existence |
||
2246 | mov byte [edi], 0 |
||
2247 | push edi |
||
6468 | pathoswith | 2248 | call hd_find_lfn |
2288 | clevermous | 2249 | pop esi |
2250 | mov byte [esi], '/' |
||
2251 | jnc @f |
||
2252 | .notfound0: |
||
2253 | mov eax, ERROR_FILE_NOT_FOUND |
||
2254 | .ret1: |
||
2255 | mov [esp+28], eax |
||
2643 | clevermous | 2256 | call fat_unlock |
2288 | clevermous | 2257 | popad |
2258 | xor ebx, ebx |
||
2259 | ret |
||
6468 | pathoswith | 2260 | |
2288 | clevermous | 2261 | @@: |
2262 | inc esi |
||
2263 | test byte [edi+11], 0x10 ; must be directory |
||
2264 | mov eax, ERROR_ACCESS_DENIED |
||
2265 | jz .ret1 |
||
2643 | clevermous | 2266 | mov edx, [edi+20-2] |
2267 | mov dx, [edi+26] ; ebp=cluster |
||
6468 | pathoswith | 2268 | mov eax, ERROR_FS_FAIL |
2643 | clevermous | 2269 | cmp edx, 2 |
2288 | clevermous | 2270 | jb .ret1 |
2271 | .pushnotroot: |
||
2643 | clevermous | 2272 | push edx |
2288 | clevermous | 2273 | push fat_notroot_extend_dir |
2274 | push fat_notroot_end_write |
||
2275 | push fat_notroot_next_write |
||
2276 | push fat_notroot_begin_write |
||
2277 | push 0 |
||
2643 | clevermous | 2278 | push edx |
2288 | clevermous | 2279 | push fat_notroot_first |
2280 | push fat_notroot_next |
||
2281 | .common1: |
||
2282 | call fat_find_lfn |
||
2283 | jc .notfound |
||
2284 | test byte [edi+11], 10h |
||
2285 | jz .exists_file |
||
6468 | pathoswith | 2286 | ; found directory |
2643 | clevermous | 2287 | add esp, 36 |
2288 | call fat_unlock |
||
2288 | clevermous | 2289 | popad |
2290 | test al, al |
||
2291 | mov eax, ERROR_ACCESS_DENIED |
||
2292 | jz @f |
||
2293 | mov al, 0 |
||
2294 | @@: |
||
2295 | xor ebx, ebx |
||
2296 | ret |
||
6468 | pathoswith | 2297 | |
2288 | clevermous | 2298 | .exists_file: |
2643 | clevermous | 2299 | cmp byte [esp+36+28], 0 |
2288 | clevermous | 2300 | jz @f |
2643 | clevermous | 2301 | add esp, 36 |
2302 | call fat_unlock |
||
2288 | clevermous | 2303 | popad |
2304 | mov eax, ERROR_ACCESS_DENIED |
||
2305 | xor ebx, ebx |
||
2306 | ret |
||
6468 | pathoswith | 2307 | |
2308 | @@: ; delete FAT chain |
||
2288 | clevermous | 2309 | push edi |
2310 | xor eax, eax |
||
2311 | mov dword [edi+28], eax ; zero size |
||
2312 | xor ecx, ecx |
||
2313 | mov eax, [edi+20-2] |
||
2314 | mov ax, [edi+26] |
||
2315 | mov word [edi+20], cx |
||
2316 | mov word [edi+26], cx |
||
2317 | test eax, eax |
||
2318 | jz .done1 |
||
2319 | @@: |
||
2643 | clevermous | 2320 | cmp eax, [ebp+FAT.fatRESERVED] |
2288 | clevermous | 2321 | jae .done1 |
2322 | push edx |
||
2323 | xor edx, edx |
||
2324 | call set_FAT |
||
2325 | mov eax, edx |
||
2326 | pop edx |
||
2643 | clevermous | 2327 | jc .done1 |
2288 | clevermous | 2328 | inc ecx |
2329 | jmp @b |
||
6468 | pathoswith | 2330 | |
2331 | .short_name_found: |
||
2332 | pop ecx edi esi |
||
2333 | call fat_next_short_name |
||
2334 | jnc .test_short_name_loop |
||
2335 | .disk_full: |
||
2336 | add esp, 12+36 |
||
2337 | call fat_unlock |
||
2338 | popa |
||
2339 | mov eax, ERROR_DISK_FULL |
||
2340 | xor ebx, ebx |
||
2341 | ret |
||
2342 | |||
2343 | .notfound: ; generate short name |
||
2288 | clevermous | 2344 | call fat_name_is_legal |
2345 | jc @f |
||
2643 | clevermous | 2346 | add esp, 36 |
2347 | call fat_unlock |
||
2288 | clevermous | 2348 | popad |
2349 | mov eax, ERROR_FILE_NOT_FOUND |
||
2350 | xor ebx, ebx |
||
2351 | ret |
||
6468 | pathoswith | 2352 | |
2288 | clevermous | 2353 | @@: |
2354 | sub esp, 12 |
||
2355 | mov edi, esp |
||
2356 | call fat_gen_short_name |
||
2357 | .test_short_name_loop: |
||
2358 | push esi edi ecx |
||
2359 | mov esi, edi |
||
2360 | lea eax, [esp+12+12+8] |
||
2643 | clevermous | 2361 | mov edx, [eax+24] |
2362 | mov [eax], edx |
||
2288 | clevermous | 2363 | and dword [eax+4], 0 |
2364 | call dword [eax-4] |
||
2365 | jc .found |
||
2366 | .test_short_name_entry: |
||
2367 | cmp byte [edi+11], 0xF |
||
2368 | jz .test_short_name_cont |
||
2369 | mov ecx, 11 |
||
2370 | push esi edi |
||
2371 | repz cmpsb |
||
2372 | pop edi esi |
||
2373 | jz .short_name_found |
||
2374 | .test_short_name_cont: |
||
2375 | lea eax, [esp+12+12+8] |
||
2376 | call dword [eax-8] |
||
2377 | jnc .test_short_name_entry |
||
2378 | .found: |
||
2379 | pop ecx edi esi |
||
2380 | ; now find space in directory |
||
2381 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
||
2382 | mov al, '~' |
||
2383 | push ecx edi |
||
2384 | mov ecx, 8 |
||
2385 | repnz scasb |
||
3598 | clevermous | 2386 | movi eax, 1 ; 1 entry |
2288 | clevermous | 2387 | jnz .notilde |
2388 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
||
2389 | xor eax, eax |
||
2390 | @@: |
||
2391 | cmp byte [esi], 0 |
||
2392 | jz @f |
||
2393 | inc esi |
||
2394 | inc eax |
||
2395 | jmp @b |
||
6468 | pathoswith | 2396 | |
2288 | clevermous | 2397 | @@: |
2398 | sub esi, eax |
||
2399 | add eax, 12+13 |
||
2400 | mov ecx, 13 |
||
2401 | push edx |
||
2402 | cdq |
||
2403 | div ecx |
||
2404 | pop edx |
||
2405 | .notilde: |
||
2406 | push -1 |
||
2407 | push -1 |
||
2408 | push -1 |
||
2409 | ; find |
||
2410 | xor ecx, ecx |
||
2411 | push eax |
||
2412 | lea eax, [esp+16+8+12+8] |
||
2643 | clevermous | 2413 | mov edx, [eax+24] |
2414 | mov [eax], edx |
||
2288 | clevermous | 2415 | and dword [eax+4], 0 |
2416 | call dword [eax-4] |
||
2417 | pop eax |
||
2418 | jnc .scan_dir |
||
2419 | .fsfrfe3: |
||
2643 | clevermous | 2420 | add esp, 12+8+12+36 |
2421 | call fat_unlock |
||
2288 | clevermous | 2422 | popad |
2643 | clevermous | 2423 | mov eax, ERROR_DEVICE |
2288 | clevermous | 2424 | xor ebx, ebx |
2425 | ret |
||
6468 | pathoswith | 2426 | |
2288 | clevermous | 2427 | .scan_dir: |
2428 | cmp byte [edi], 0 |
||
2429 | jz .free |
||
2430 | cmp byte [edi], 0xE5 |
||
2431 | jz .free |
||
2432 | xor ecx, ecx |
||
2433 | .scan_cont: |
||
2434 | push eax |
||
2435 | lea eax, [esp+16+8+12+8] |
||
2436 | call dword [eax-8] |
||
2643 | clevermous | 2437 | mov edx, eax |
2288 | clevermous | 2438 | pop eax |
2439 | jnc .scan_dir |
||
2643 | clevermous | 2440 | cmp edx, ERROR_DEVICE |
2441 | jz .fsfrfe3 |
||
2288 | clevermous | 2442 | push eax |
2443 | lea eax, [esp+16+8+12+8] |
||
2444 | call dword [eax+20] ; extend directory |
||
2445 | pop eax |
||
2446 | jnc .scan_dir |
||
2643 | clevermous | 2447 | add esp, 12+8+12+36 |
2448 | call fat_unlock |
||
2288 | clevermous | 2449 | popad |
2450 | mov eax, ERROR_DISK_FULL |
||
2451 | xor ebx, ebx |
||
2452 | ret |
||
6468 | pathoswith | 2453 | |
2288 | clevermous | 2454 | .free: |
2455 | test ecx, ecx |
||
2456 | jnz @f |
||
2457 | mov [esp], edi |
||
2458 | mov ecx, [esp+12+8+12+8] |
||
2459 | mov [esp+4], ecx |
||
2460 | mov ecx, [esp+12+8+12+12] |
||
2461 | mov [esp+8], ecx |
||
2462 | xor ecx, ecx |
||
2463 | @@: |
||
2464 | inc ecx |
||
2465 | cmp ecx, eax |
||
2466 | jb .scan_cont |
||
2467 | ; found! |
||
2643 | clevermous | 2468 | push esi ecx |
2469 | ; If creating a directory, allocate one data cluster now and fail immediately |
||
2470 | ; if this is impossible. This prevents from creating an invalid directory entry |
||
2471 | ; on a full disk. |
||
2472 | ; yup, the argument is quite non-intuitive... but what should I do if |
||
2473 | ; the entire function uses such arguments? BTW, it refers to al from pushad, |
||
6468 | pathoswith | 2474 | ; which in turn is filled with 0 in fat_CreateFile and 1 in fat_CreateFolder. |
2643 | clevermous | 2475 | cmp byte [esp+8+12+8+12+36+28], 0 |
2476 | jz .no.preallocate.folder.data |
||
2477 | call get_free_FAT |
||
2478 | jnc @f |
||
2479 | add esp, 8+12+8 |
||
2480 | jmp .disk_full |
||
6468 | pathoswith | 2481 | |
2643 | clevermous | 2482 | @@: |
2483 | mov [esp+8+12+8+12+36+20], eax ; store the cluster somewhere |
||
6468 | pathoswith | 2484 | .no.preallocate.folder.data: ; calculate name checksum |
2288 | clevermous | 2485 | mov esi, [esp+8+12] |
2486 | mov ecx, 11 |
||
2487 | xor eax, eax |
||
2488 | @@: |
||
2489 | ror al, 1 |
||
2490 | add al, [esi] |
||
2491 | inc esi |
||
2492 | loop @b |
||
2493 | pop ecx esi |
||
2494 | pop edi |
||
2495 | pop dword [esp+8+12+12] |
||
2496 | pop dword [esp+8+12+12] |
||
2497 | ; edi points to first entry in free chunk |
||
2498 | dec ecx |
||
2499 | jz .nolfn |
||
2500 | push esi |
||
2501 | push eax |
||
2502 | lea eax, [esp+8+8+12+8] |
||
2503 | call dword [eax+8] ; begin write |
||
2504 | mov al, 40h |
||
2505 | .writelfn: |
||
2506 | or al, cl |
||
2507 | mov esi, [esp+4] |
||
2508 | push ecx |
||
2509 | dec ecx |
||
2510 | imul ecx, 13 |
||
2511 | add esi, ecx |
||
2512 | stosb |
||
2513 | mov cl, 5 |
||
4273 | clevermous | 2514 | call fat_read_symbols |
2288 | clevermous | 2515 | mov ax, 0xF |
2516 | stosw |
||
2517 | mov al, [esp+4] |
||
2518 | stosb |
||
2519 | mov cl, 6 |
||
4273 | clevermous | 2520 | call fat_read_symbols |
2288 | clevermous | 2521 | xor eax, eax |
2522 | stosw |
||
2523 | mov cl, 2 |
||
4273 | clevermous | 2524 | call fat_read_symbols |
2288 | clevermous | 2525 | pop ecx |
2526 | lea eax, [esp+8+8+12+8] |
||
2527 | call dword [eax+12] ; next write |
||
2528 | xor eax, eax |
||
2529 | loop .writelfn |
||
2530 | pop eax |
||
2531 | pop esi |
||
2532 | .nolfn: |
||
2533 | xchg esi, [esp] |
||
2534 | mov ecx, 11 |
||
2535 | rep movsb |
||
2536 | mov word [edi], 20h ; attributes |
||
2537 | sub edi, 11 |
||
2538 | pop esi ecx |
||
2539 | add esp, 12 |
||
2540 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
||
2541 | call get_time_for_file |
||
2542 | mov [edi+14], ax ; creation time |
||
2543 | mov [edi+22], ax ; last write time |
||
2544 | call get_date_for_file |
||
2545 | mov [edi+16], ax ; creation date |
||
2546 | mov [edi+24], ax ; last write date |
||
2547 | mov [edi+18], ax ; last access date |
||
2548 | xor ecx, ecx |
||
2549 | mov word [edi+20], cx ; high word of cluster |
||
2550 | mov word [edi+26], cx ; low word of cluster - to be filled |
||
2551 | mov dword [edi+28], ecx ; file size - to be filled |
||
2643 | clevermous | 2552 | cmp byte [esp+36+28], cl |
2288 | clevermous | 2553 | jz .doit |
2554 | ; create directory |
||
2555 | mov byte [edi+11], 10h ; attributes: folder |
||
2643 | clevermous | 2556 | mov esi, edi |
2288 | clevermous | 2557 | lea eax, [esp+8] |
2558 | call dword [eax+16] ; flush directory |
||
2643 | clevermous | 2559 | mov eax, [esp+36+20] ; extract saved cluster |
2560 | mov [esp+36+20], edi ; this is needed for calculating arg of add_disk_free_space! |
||
2288 | clevermous | 2561 | push ecx |
2643 | clevermous | 2562 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 2563 | shl ecx, 9 |
2643 | clevermous | 2564 | push ecx |
2565 | push edi |
||
2288 | clevermous | 2566 | jmp .doit2 |
6468 | pathoswith | 2567 | |
2568 | .done1: |
||
2569 | pop edi |
||
2570 | call get_time_for_file |
||
2571 | mov [edi+22], ax |
||
2572 | call get_date_for_file |
||
2573 | mov [edi+24], ax |
||
2574 | mov [edi+18], ax |
||
2575 | or byte [edi+11], 20h ; set 'archive' attribute |
||
2288 | clevermous | 2576 | .doit: |
2643 | clevermous | 2577 | mov esi, [esp+36+20] |
2288 | clevermous | 2578 | lea eax, [esp+8] |
2579 | call dword [eax+16] ; flush directory |
||
2580 | push ecx |
||
2643 | clevermous | 2581 | mov ecx, [esp+4+36+24] |
2288 | clevermous | 2582 | push ecx |
2583 | push edi |
||
2584 | test ecx, ecx |
||
2585 | jz .done |
||
2586 | call get_free_FAT |
||
2587 | jc .diskfull |
||
2643 | clevermous | 2588 | .doit2: |
2288 | clevermous | 2589 | push eax |
2590 | mov [edi+26], ax |
||
2591 | shr eax, 16 |
||
2592 | mov [edi+20], ax |
||
2593 | lea eax, [esp+16+8] |
||
2594 | call dword [eax+16] ; flush directory |
||
2595 | pop eax |
||
2596 | push edx |
||
2643 | clevermous | 2597 | mov edx, [ebp+FAT.fatEND] |
2288 | clevermous | 2598 | call set_FAT |
2599 | pop edx |
||
2600 | .write_cluster: |
||
2601 | push eax |
||
2602 | dec eax |
||
2603 | dec eax |
||
2643 | clevermous | 2604 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2605 | add eax, [ebp+FAT.DATA_START] |
||
2606 | push [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2288 | clevermous | 2607 | .write_sector: |
2643 | clevermous | 2608 | cmp byte [esp+20+36+28], 0 |
2288 | clevermous | 2609 | jnz .writedir |
2610 | mov ecx, 512 |
||
2643 | clevermous | 2611 | cmp dword [esp+12], ecx |
2288 | clevermous | 2612 | jb .writeshort |
2613 | ; we can write directly from given buffer |
||
2614 | mov ebx, esi |
||
2615 | add esi, ecx |
||
2616 | jmp .writecommon |
||
6468 | pathoswith | 2617 | |
2288 | clevermous | 2618 | .writeshort: |
2643 | clevermous | 2619 | mov ecx, [esp+12] |
2288 | clevermous | 2620 | push ecx |
2643 | clevermous | 2621 | lea edi, [ebp+FAT.buffer] |
2288 | clevermous | 2622 | mov ebx, edi |
2623 | rep movsb |
||
2624 | .writedircont: |
||
2643 | clevermous | 2625 | lea ecx, [ebp+FAT.buffer+0x200] |
2288 | clevermous | 2626 | sub ecx, edi |
2627 | push eax |
||
2628 | xor eax, eax |
||
2629 | rep stosb |
||
2630 | pop eax |
||
2631 | pop ecx |
||
2632 | .writecommon: |
||
2643 | clevermous | 2633 | push eax |
2634 | call fs_write32_app |
||
2635 | test eax, eax |
||
2636 | pop eax |
||
2288 | clevermous | 2637 | jnz .writeerr |
2638 | inc eax |
||
2643 | clevermous | 2639 | sub dword [esp+12], ecx |
2288 | clevermous | 2640 | jz .writedone |
2643 | clevermous | 2641 | dec dword [esp] |
2288 | clevermous | 2642 | jnz .write_sector |
2643 | clevermous | 2643 | pop eax |
2288 | clevermous | 2644 | ; allocate new cluster |
2645 | pop eax |
||
2646 | mov ecx, eax |
||
2647 | call get_free_FAT |
||
2648 | jc .diskfull |
||
2649 | push edx |
||
2643 | clevermous | 2650 | mov edx, [ebp+FAT.fatEND] |
2288 | clevermous | 2651 | call set_FAT |
2652 | xchg eax, ecx |
||
2653 | mov edx, ecx |
||
2654 | call set_FAT |
||
2655 | pop edx |
||
2656 | xchg eax, ecx |
||
2657 | jmp .write_cluster |
||
6468 | pathoswith | 2658 | |
2288 | clevermous | 2659 | .diskfull: |
2660 | mov eax, ERROR_DISK_FULL |
||
2661 | jmp .ret |
||
6468 | pathoswith | 2662 | |
2288 | clevermous | 2663 | .writeerr: |
2643 | clevermous | 2664 | pop eax eax |
2288 | clevermous | 2665 | sub esi, ecx |
2643 | clevermous | 2666 | mov eax, ERROR_DEVICE |
2288 | clevermous | 2667 | jmp .ret |
6468 | pathoswith | 2668 | |
2288 | clevermous | 2669 | .writedone: |
2643 | clevermous | 2670 | pop eax eax |
2288 | clevermous | 2671 | .done: |
2672 | xor eax, eax |
||
2673 | .ret: |
||
2674 | pop edi ecx |
||
2643 | clevermous | 2675 | sub esi, [esp+4+36+20] |
2676 | mov [esp+4+36+28], eax |
||
2677 | mov [esp+4+36+16], esi |
||
2678 | lea eax, [esp+12] |
||
2288 | clevermous | 2679 | call dword [eax+8] |
2643 | clevermous | 2680 | mov [edi+28], esi |
2288 | clevermous | 2681 | call dword [eax+16] |
2643 | clevermous | 2682 | mov [esp+36+16], ebx |
2683 | lea eax, [esi+511] |
||
2288 | clevermous | 2684 | shr eax, 9 |
2643 | clevermous | 2685 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 2686 | lea eax, [eax+ecx-1] |
2687 | xor edx, edx |
||
2688 | div ecx |
||
2643 | clevermous | 2689 | pop ecx |
2288 | clevermous | 2690 | sub ecx, eax |
2691 | call add_disk_free_space |
||
2643 | clevermous | 2692 | add esp, 36 |
2288 | clevermous | 2693 | call update_disk |
2643 | clevermous | 2694 | call fat_unlock |
2288 | clevermous | 2695 | popad |
2696 | ret |
||
6468 | pathoswith | 2697 | |
2288 | clevermous | 2698 | .writedir: |
2699 | push 512 |
||
2643 | clevermous | 2700 | lea edi, [ebp+FAT.buffer] |
2288 | clevermous | 2701 | mov ebx, edi |
2643 | clevermous | 2702 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 2703 | shl ecx, 9 |
2643 | clevermous | 2704 | cmp ecx, [esp+16] |
2288 | clevermous | 2705 | jnz .writedircont |
2643 | clevermous | 2706 | dec dword [esp+20] |
2288 | clevermous | 2707 | push esi |
2708 | mov ecx, 32/4 |
||
2709 | rep movsd |
||
2710 | pop esi |
||
2711 | mov dword [edi-32], '. ' |
||
2712 | mov dword [edi-32+4], ' ' |
||
2713 | mov dword [edi-32+8], ' ' |
||
2714 | mov byte [edi-32+11], 10h |
||
2715 | push esi |
||
2716 | mov ecx, 32/4 |
||
2717 | rep movsd |
||
2718 | pop esi |
||
2719 | mov dword [edi-32], '.. ' |
||
2720 | mov dword [edi-32+4], ' ' |
||
2721 | mov dword [edi-32+8], ' ' |
||
2722 | mov byte [edi-32+11], 10h |
||
2643 | clevermous | 2723 | mov ecx, [esp+20+36] |
2724 | cmp ecx, [ebp+FAT.ROOT_CLUSTER] |
||
2288 | clevermous | 2725 | jnz @f |
2726 | xor ecx, ecx |
||
2727 | @@: |
||
2728 | mov word [edi-32+26], cx |
||
2729 | shr ecx, 16 |
||
2730 | mov [edi-32+20], cx |
||
2731 | jmp .writedircont |
||
2732 | |||
4273 | clevermous | 2733 | fat_read_symbol: |
2734 | or ax, -1 |
||
2735 | test esi, esi |
||
2736 | jz .retFFFF |
||
2737 | lodsb |
||
2738 | test al, al |
||
2739 | jnz ansi2uni_char |
||
2740 | xor eax, eax |
||
2741 | xor esi, esi |
||
2742 | .retFFFF: |
||
2743 | ret |
||
2744 | |||
2745 | fat_read_symbols: |
||
2746 | call fat_read_symbol |
||
2747 | stosw |
||
2748 | loop fat_read_symbols |
||
2749 | ret |
||
2750 | |||
2643 | clevermous | 2751 | ;---------------------------------------------------------------- |
2752 | fat_Write: |
||
2288 | clevermous | 2753 | cmp byte [esi], 0 |
2754 | jz .access_denied |
||
2643 | clevermous | 2755 | call fat_lock |
2756 | push edi |
||
6468 | pathoswith | 2757 | call hd_find_lfn |
2288 | clevermous | 2758 | jnc .found |
2643 | clevermous | 2759 | pop edi |
2760 | push eax |
||
2761 | call fat_unlock |
||
6468 | pathoswith | 2762 | .ret0: |
2763 | pop eax |
||
2764 | xor ebx, ebx |
||
2765 | ret |
||
2766 | |||
2767 | .access_denied: |
||
2768 | push ERROR_ACCESS_DENIED |
||
3742 | clevermous | 2769 | jmp .ret0 |
6468 | pathoswith | 2770 | |
2771 | .found: ; FAT does not support files larger than 4GB |
||
2643 | clevermous | 2772 | cmp dword [ebx+8], 0 |
2288 | clevermous | 2773 | jz @f |
2774 | .eof: |
||
2643 | clevermous | 2775 | pop edi |
2288 | clevermous | 2776 | push ERROR_END_OF_FILE |
2643 | clevermous | 2777 | call fat_unlock |
3742 | clevermous | 2778 | jmp .ret0 |
2288 | clevermous | 2779 | @@: |
2643 | clevermous | 2780 | mov ecx, [ebx+12] |
2781 | mov edx, [ebx+16] |
||
2782 | mov ebx, [ebx+4] |
||
2288 | clevermous | 2783 | ; now edi points to direntry, ebx=start byte to write, |
2784 | ; ecx=number of bytes to write, edx=data pointer |
||
2785 | ; extend file if needed |
||
2786 | add ecx, ebx |
||
2787 | jc .eof ; FAT does not support files larger than 4GB |
||
2643 | clevermous | 2788 | push edx |
2288 | clevermous | 2789 | push eax ; save directory sector |
2790 | push 0 ; return value=0 |
||
2791 | call get_time_for_file |
||
2792 | mov [edi+22], ax ; last write time |
||
2793 | call get_date_for_file |
||
2794 | mov [edi+24], ax ; last write date |
||
2795 | mov [edi+18], ax ; last access date |
||
2796 | push dword [edi+28] ; save current file size |
||
2797 | cmp ecx, [edi+28] |
||
2798 | jbe .length_ok |
||
2799 | cmp ecx, ebx |
||
2800 | jz .length_ok |
||
2801 | call hd_extend_file |
||
2802 | jnc .length_ok |
||
2803 | mov [esp+4], eax |
||
2804 | ; hd_extend_file can return three error codes: FAT table error, device error or disk full. |
||
2805 | ; First two cases are fatal errors, in third case we may write some data |
||
2806 | cmp al, ERROR_DISK_FULL |
||
2807 | jz .disk_full |
||
2643 | clevermous | 2808 | call fat_unlock |
2288 | clevermous | 2809 | pop eax |
2810 | pop eax |
||
2643 | clevermous | 2811 | pop ecx |
2812 | pop edx |
||
2813 | pop edi |
||
2288 | clevermous | 2814 | xor ebx, ebx |
2815 | ret |
||
2816 | .disk_full: |
||
2817 | ; correct number of bytes to write |
||
2818 | mov ecx, [edi+28] |
||
2819 | cmp ecx, ebx |
||
2820 | ja .length_ok |
||
2643 | clevermous | 2821 | push 0 |
2288 | clevermous | 2822 | .ret: |
2643 | clevermous | 2823 | pop eax |
2824 | sub edx, [esp+12] |
||
2825 | mov ebx, edx ; ebx=number of written bytes |
||
2288 | clevermous | 2826 | call update_disk |
2643 | clevermous | 2827 | test eax, eax |
2288 | clevermous | 2828 | jz @f |
2643 | clevermous | 2829 | mov byte [esp+4], ERROR_DEVICE |
2288 | clevermous | 2830 | @@: |
2643 | clevermous | 2831 | call fat_unlock |
2288 | clevermous | 2832 | pop eax |
2833 | pop eax |
||
2643 | clevermous | 2834 | pop ecx |
2835 | pop edx |
||
2836 | pop edi |
||
2288 | clevermous | 2837 | ret |
2838 | .length_ok: |
||
2839 | mov esi, [edi+28] |
||
2840 | mov eax, [edi+20-2] |
||
2841 | mov ax, [edi+26] |
||
2842 | mov edi, eax ; edi=current cluster |
||
2643 | clevermous | 2843 | push 0 ; current sector in cluster |
2288 | clevermous | 2844 | ; save directory |
2643 | clevermous | 2845 | mov eax, [esp+12] |
2288 | clevermous | 2846 | push ebx |
2643 | clevermous | 2847 | lea ebx, [ebp+FAT.buffer] |
2848 | call fs_write32_sys |
||
2288 | clevermous | 2849 | pop ebx |
2643 | clevermous | 2850 | test eax, eax |
2288 | clevermous | 2851 | jz @f |
2852 | .device_err: |
||
2643 | clevermous | 2853 | mov byte [esp+8], ERROR_DEVICE |
2288 | clevermous | 2854 | jmp .ret |
2643 | clevermous | 2855 | .fat_err: |
6468 | pathoswith | 2856 | mov byte [esp+8], ERROR_FS_FAIL |
2643 | clevermous | 2857 | jmp .ret |
2288 | clevermous | 2858 | @@: |
2859 | |||
2860 | ; now ebx=start pos, ecx=end pos, both lie inside file |
||
2861 | sub ecx, ebx |
||
2862 | jz .ret |
||
2863 | .write_loop: |
||
2864 | ; skip unmodified sectors |
||
2643 | clevermous | 2865 | cmp dword [esp+4], 0x200 |
2288 | clevermous | 2866 | jb .modify |
2867 | sub ebx, 0x200 |
||
2868 | jae .skip |
||
2869 | add ebx, 0x200 |
||
2870 | .modify: |
||
2871 | ; get length of data in current sector |
||
2872 | push ecx |
||
2873 | sub ebx, 0x200 |
||
2874 | jb .hasdata |
||
2875 | neg ebx |
||
2876 | xor ecx, ecx |
||
2877 | jmp @f |
||
2878 | .hasdata: |
||
2879 | neg ebx |
||
2880 | cmp ecx, ebx |
||
2881 | jbe @f |
||
2882 | mov ecx, ebx |
||
2883 | @@: |
||
2884 | ; get current sector number |
||
2885 | mov eax, edi |
||
2886 | dec eax |
||
2887 | dec eax |
||
2643 | clevermous | 2888 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2889 | add eax, [ebp+FAT.DATA_START] |
||
2890 | add eax, [esp+4] |
||
2288 | clevermous | 2891 | ; load sector if needed |
2643 | clevermous | 2892 | cmp dword [esp+8], 0 ; we don't need to read uninitialized data |
2288 | clevermous | 2893 | jz .noread |
2894 | cmp ecx, 0x200 ; we don't need to read sector if it is fully rewritten |
||
2895 | jz .noread |
||
2896 | cmp ecx, esi ; (same for the last sector) |
||
2897 | jz .noread |
||
2643 | clevermous | 2898 | push eax ebx |
2899 | lea ebx, [ebp+FAT.buffer] |
||
2900 | call fs_read32_app |
||
2901 | test eax, eax |
||
2902 | pop ebx eax |
||
2288 | clevermous | 2903 | jz @f |
2904 | .device_err2: |
||
2905 | pop ecx |
||
2906 | jmp .device_err |
||
2907 | @@: |
||
2908 | .noread: |
||
2909 | ; zero uninitialized data if file was extended (because hd_extend_file does not this) |
||
2910 | push eax ecx edi |
||
2911 | xor eax, eax |
||
2912 | mov ecx, 0x200 |
||
2643 | clevermous | 2913 | sub ecx, [esp+8+12] |
2288 | clevermous | 2914 | jbe @f |
2643 | clevermous | 2915 | lea edi, [ebp+FAT.buffer] |
2916 | add edi, [esp+8+12] |
||
2288 | clevermous | 2917 | rep stosb |
2918 | @@: |
||
2919 | ; zero uninitialized data in the last sector |
||
2920 | mov ecx, 0x200 |
||
2921 | sub ecx, esi |
||
2922 | jbe @f |
||
2643 | clevermous | 2923 | lea edi, [ebp+FAT.buffer+esi] |
2288 | clevermous | 2924 | rep stosb |
2925 | @@: |
||
2926 | pop edi ecx |
||
2927 | ; copy new data |
||
2928 | mov eax, edx |
||
2929 | neg ebx |
||
2930 | jecxz @f |
||
2643 | clevermous | 2931 | lea ebx, [ebp+FAT.buffer+0x200+ebx] |
2288 | clevermous | 2932 | call memmove |
2933 | xor ebx, ebx |
||
2934 | @@: |
||
2935 | pop eax |
||
2936 | ; save sector |
||
2937 | push ebx |
||
2643 | clevermous | 2938 | lea ebx, [ebp+FAT.buffer] |
2939 | call fs_write32_app |
||
2288 | clevermous | 2940 | pop ebx |
2643 | clevermous | 2941 | test eax, eax |
2288 | clevermous | 2942 | jnz .device_err2 |
2943 | add edx, ecx |
||
2944 | sub [esp], ecx |
||
2945 | pop ecx |
||
2946 | jz .ret |
||
2947 | .skip: |
||
2948 | ; next sector |
||
2643 | clevermous | 2949 | pop eax |
2950 | inc eax |
||
2951 | push eax |
||
2952 | cmp eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2288 | clevermous | 2953 | jb @f |
2643 | clevermous | 2954 | and dword [esp], 0 |
2288 | clevermous | 2955 | mov eax, edi |
2956 | call get_FAT |
||
2957 | mov edi, eax |
||
2643 | clevermous | 2958 | jc .device_err |
2959 | cmp edi, 2 |
||
2960 | jb .fat_err |
||
2961 | cmp edi, [ebp+FAT.fatRESERVED] |
||
2962 | jae .fat_err |
||
2288 | clevermous | 2963 | @@: |
2964 | sub esi, 0x200 |
||
2965 | jae @f |
||
2966 | xor esi, esi |
||
2967 | @@: |
||
2643 | clevermous | 2968 | sub dword [esp+4], 0x200 |
2288 | clevermous | 2969 | jae @f |
2643 | clevermous | 2970 | and dword [esp+4], 0 |
2288 | clevermous | 2971 | @@: |
2972 | jmp .write_loop |
||
2973 | |||
2974 | hd_extend_file.zero_size: |
||
2975 | xor eax, eax |
||
2976 | jmp hd_extend_file.start_extend |
||
2977 | |||
2978 | ; extends file on hd to given size (new data area is undefined) |
||
2979 | ; in: edi->direntry, ecx=new size |
||
2980 | ; out: CF=0 => OK, eax=0 |
||
6468 | pathoswith | 2981 | ; CF=1 => error, eax=code (ERROR_FS_FAIL or ERROR_DISK_FULL or ERROR_DEVICE) |
2288 | clevermous | 2982 | hd_extend_file: |
2643 | clevermous | 2983 | push esi |
2984 | mov esi, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2985 | imul esi, [ebp+FAT.BYTES_PER_SECTOR] |
||
2288 | clevermous | 2986 | push ecx |
2987 | ; find the last cluster of file |
||
2988 | mov eax, [edi+20-2] |
||
2989 | mov ax, [edi+26] |
||
2990 | mov ecx, [edi+28] |
||
2991 | jecxz .zero_size |
||
2992 | .last_loop: |
||
2643 | clevermous | 2993 | sub ecx, esi |
2288 | clevermous | 2994 | jbe .last_found |
2995 | call get_FAT |
||
2643 | clevermous | 2996 | jnc @f |
2288 | clevermous | 2997 | .device_err: |
2998 | pop ecx |
||
2999 | .device_err2: |
||
2643 | clevermous | 3000 | pop esi |
3001 | push ERROR_DEVICE |
||
2288 | clevermous | 3002 | .ret_err: |
3003 | pop eax |
||
3004 | stc |
||
3005 | ret |
||
3006 | @@: |
||
3007 | cmp eax, 2 |
||
3008 | jb .fat_err |
||
2643 | clevermous | 3009 | cmp eax, [ebp+FAT.fatRESERVED] |
2288 | clevermous | 3010 | jb .last_loop |
3011 | .fat_err: |
||
2643 | clevermous | 3012 | pop ecx esi |
6468 | pathoswith | 3013 | push ERROR_FS_FAIL |
2288 | clevermous | 3014 | jmp .ret_err |
3015 | .last_found: |
||
3016 | push eax |
||
3017 | call get_FAT |
||
2643 | clevermous | 3018 | jnc @f |
2288 | clevermous | 3019 | pop eax |
3020 | jmp .device_err |
||
3021 | @@: |
||
2643 | clevermous | 3022 | cmp eax, [ebp+FAT.fatRESERVED] |
2288 | clevermous | 3023 | pop eax |
3024 | jb .fat_err |
||
3025 | ; set length to full number of clusters |
||
3026 | sub [edi+28], ecx |
||
3027 | .start_extend: |
||
3028 | pop ecx |
||
3029 | ; now do extend |
||
3030 | push edx |
||
3031 | mov edx, 2 ; start scan from cluster 2 |
||
3032 | .extend_loop: |
||
3033 | cmp [edi+28], ecx |
||
3034 | jae .extend_done |
||
3035 | ; add new cluster |
||
3036 | push eax |
||
3037 | call get_free_FAT |
||
3038 | jc .disk_full |
||
2643 | clevermous | 3039 | mov edx, [ebp+FAT.fatEND] |
2288 | clevermous | 3040 | call set_FAT |
3041 | mov edx, eax |
||
3042 | pop eax |
||
3043 | test eax, eax |
||
3044 | jz .first_cluster |
||
3045 | push edx |
||
3046 | call set_FAT |
||
3047 | pop edx |
||
3048 | jmp @f |
||
3049 | .first_cluster: |
||
3050 | ror edx, 16 |
||
3051 | mov [edi+20], dx |
||
3052 | ror edx, 16 |
||
3053 | mov [edi+26], dx |
||
3054 | @@: |
||
3055 | push ecx |
||
3056 | mov ecx, -1 |
||
3057 | call add_disk_free_space |
||
3058 | pop ecx |
||
3059 | mov eax, edx |
||
2643 | clevermous | 3060 | add [edi+28], esi |
2288 | clevermous | 3061 | jmp .extend_loop |
3062 | .extend_done: |
||
3063 | mov [edi+28], ecx |
||
2643 | clevermous | 3064 | pop edx esi |
2288 | clevermous | 3065 | xor eax, eax ; CF=0 |
3066 | ret |
||
3067 | .device_err3: |
||
3068 | pop edx |
||
3069 | jmp .device_err2 |
||
3070 | .disk_full: |
||
2643 | clevermous | 3071 | pop eax edx esi |
3598 | clevermous | 3072 | movi eax, ERROR_DISK_FULL |
2288 | clevermous | 3073 | stc |
3074 | ret |
||
3075 | |||
4273 | clevermous | 3076 | fat_update_datetime: |
3077 | call get_time_for_file |
||
3078 | mov [edi+22], ax ; last write time |
||
3079 | call get_date_for_file |
||
3080 | mov [edi+24], ax ; last write date |
||
3081 | mov [edi+18], ax ; last access date |
||
3082 | ret |
||
3083 | |||
2288 | clevermous | 3084 | ;---------------------------------------------------------------- |
2643 | clevermous | 3085 | fat_SetFileEnd: |
3086 | call fat_lock |
||
3087 | push edi |
||
2288 | clevermous | 3088 | cmp byte [esi], 0 |
3089 | jnz @f |
||
3090 | .access_denied: |
||
3091 | push ERROR_ACCESS_DENIED |
||
2643 | clevermous | 3092 | .ret: |
3093 | call fat_unlock |
||
3094 | pop eax |
||
3095 | pop edi |
||
3096 | ret |
||
2288 | clevermous | 3097 | @@: |
6468 | pathoswith | 3098 | call hd_find_lfn |
2288 | clevermous | 3099 | jnc @f |
2643 | clevermous | 3100 | .reteax: |
3101 | push eax |
||
2288 | clevermous | 3102 | jmp .ret |
3103 | @@: |
||
3104 | ; must not be directory |
||
3105 | test byte [edi+11], 10h |
||
2643 | clevermous | 3106 | jnz .access_denied |
2288 | clevermous | 3107 | ; file size must not exceed 4 Gb |
2643 | clevermous | 3108 | cmp dword [ebx+8], 0 |
2288 | clevermous | 3109 | jz @f |
3110 | push ERROR_END_OF_FILE |
||
3111 | jmp .ret |
||
3112 | @@: |
||
3113 | push eax ; save directory sector |
||
3114 | ; set file modification date/time to current |
||
3115 | call fat_update_datetime |
||
2643 | clevermous | 3116 | mov eax, [ebx+4] |
2288 | clevermous | 3117 | cmp eax, [edi+28] |
3118 | jb .truncate |
||
3119 | ja .expand |
||
3120 | pop eax |
||
2643 | clevermous | 3121 | lea ebx, [ebp+FAT.buffer] |
3122 | call fs_write32_sys |
||
3123 | test eax, eax |
||
2288 | clevermous | 3124 | jz @f |
2643 | clevermous | 3125 | push ERROR_DEVICE |
3126 | jmp .ret |
||
2288 | clevermous | 3127 | @@: |
2643 | clevermous | 3128 | push 0 |
3129 | jmp .ret |
||
2288 | clevermous | 3130 | .expand: |
3131 | push ebx ebp ecx |
||
3132 | push dword [edi+28] ; save old size |
||
3133 | mov ecx, eax |
||
3134 | call hd_extend_file |
||
3135 | push eax ; return code |
||
3136 | jnc .expand_ok |
||
3137 | cmp al, ERROR_DISK_FULL |
||
3138 | jz .disk_full |
||
3139 | .pop_ret: |
||
3140 | call update_disk |
||
2643 | clevermous | 3141 | pop eax ecx ecx ebp ebx ecx |
3142 | jmp .reteax |
||
2288 | clevermous | 3143 | .expand_ok: |
3144 | .disk_full: |
||
3145 | ; save directory |
||
3146 | mov eax, [edi+28] |
||
3147 | xchg eax, [esp+20] |
||
2643 | clevermous | 3148 | lea ebx, [ebp+FAT.buffer] |
3149 | call fs_write32_sys |
||
3150 | test eax, eax |
||
2288 | clevermous | 3151 | mov eax, [edi+20-2] |
3152 | mov ax, [edi+26] |
||
3153 | mov edi, eax |
||
3154 | jz @f |
||
3155 | .pop_ret11: |
||
2643 | clevermous | 3156 | mov byte [esp], ERROR_DEVICE |
2288 | clevermous | 3157 | jmp .pop_ret |
3158 | @@: |
||
2643 | clevermous | 3159 | test edi, edi |
3160 | jz .pop_ret |
||
2288 | clevermous | 3161 | ; now zero new data |
2643 | clevermous | 3162 | push 0 |
3163 | ; edi=current cluster, [esp]=sector in cluster |
||
3164 | ; [esp+24]=new size, [esp+8]=old size, [esp+4]=return code |
||
2288 | clevermous | 3165 | .zero_loop: |
2643 | clevermous | 3166 | cmp edi, 2 |
3167 | jb .error_fat |
||
3168 | cmp edi, [ebp+FAT.fatRESERVED] |
||
3169 | jae .error_fat |
||
3170 | sub dword [esp+8], 0x200 |
||
2288 | clevermous | 3171 | jae .next_cluster |
3172 | lea eax, [edi-2] |
||
2643 | clevermous | 3173 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3174 | add eax, [ebp+FAT.DATA_START] |
||
3175 | add eax, [esp] |
||
3176 | cmp dword [esp+8], -0x200 |
||
2288 | clevermous | 3177 | jz .noread |
2643 | clevermous | 3178 | push eax |
3179 | lea ebx, [ebp+FAT.buffer] |
||
3180 | call fs_read32_app |
||
3181 | test eax, eax |
||
3182 | pop eax |
||
2288 | clevermous | 3183 | jnz .err_next |
3184 | .noread: |
||
2643 | clevermous | 3185 | mov ecx, [esp+8] |
2288 | clevermous | 3186 | neg ecx |
3187 | push edi |
||
2643 | clevermous | 3188 | lea edi, [ebp+FAT.buffer+0x200] |
3189 | add edi, [esp+12] |
||
2288 | clevermous | 3190 | push eax |
3191 | xor eax, eax |
||
2643 | clevermous | 3192 | mov [esp+16], eax |
2288 | clevermous | 3193 | rep stosb |
3194 | pop eax |
||
3195 | pop edi |
||
2643 | clevermous | 3196 | call fs_write32_app |
3197 | test eax, eax |
||
2288 | clevermous | 3198 | jz .next_cluster |
3199 | .err_next: |
||
2643 | clevermous | 3200 | mov byte [esp+4], ERROR_DEVICE |
2288 | clevermous | 3201 | .next_cluster: |
2643 | clevermous | 3202 | pop eax |
2288 | clevermous | 3203 | sub dword [esp+20], 0x200 |
3204 | jbe .pop_ret |
||
2643 | clevermous | 3205 | inc eax |
3206 | push eax |
||
3207 | cmp eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2288 | clevermous | 3208 | jb .zero_loop |
2643 | clevermous | 3209 | and dword [esp], 0 |
2288 | clevermous | 3210 | mov eax, edi |
3211 | call get_FAT |
||
3212 | mov edi, eax |
||
2643 | clevermous | 3213 | jnc .zero_loop |
3214 | pop eax |
||
3215 | jmp .pop_ret11 |
||
2288 | clevermous | 3216 | .truncate: |
3217 | mov [edi+28], eax |
||
3218 | push ecx |
||
3219 | mov ecx, [edi+20-2] |
||
3220 | mov cx, [edi+26] |
||
3221 | push eax |
||
3222 | test eax, eax |
||
3223 | jz .zero_size |
||
3224 | ; find new last cluster |
||
3225 | @@: |
||
2643 | clevermous | 3226 | cmp ecx, 2 |
3227 | jb .error_fat2 |
||
3228 | cmp ecx, [ebp+FAT.fatRESERVED] |
||
3229 | jae .error_fat2 |
||
3230 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2288 | clevermous | 3231 | shl eax, 9 |
3232 | sub [esp], eax |
||
3233 | jbe @f |
||
3234 | mov eax, ecx |
||
3235 | call get_FAT |
||
3236 | mov ecx, eax |
||
2643 | clevermous | 3237 | jnc @b |
2288 | clevermous | 3238 | .device_err3: |
3239 | pop eax ecx eax edi |
||
2643 | clevermous | 3240 | call update_disk |
3241 | call fat_unlock |
||
3598 | clevermous | 3242 | movi eax, ERROR_DEVICE |
2288 | clevermous | 3243 | ret |
3244 | @@: |
||
3245 | ; we will zero data at the end of last sector - remember it |
||
3246 | push ecx |
||
3247 | ; terminate FAT chain |
||
3248 | push edx |
||
3249 | mov eax, ecx |
||
2643 | clevermous | 3250 | mov edx, [ebp+FAT.fatEND] |
2288 | clevermous | 3251 | call set_FAT |
3252 | mov eax, edx |
||
3253 | pop edx |
||
2643 | clevermous | 3254 | jnc @f |
2288 | clevermous | 3255 | .device_err4: |
3256 | pop ecx |
||
3257 | jmp .device_err3 |
||
3258 | .zero_size: |
||
3259 | and word [edi+20], 0 |
||
3260 | and word [edi+26], 0 |
||
3261 | push 0 |
||
3262 | mov eax, ecx |
||
3263 | @@: |
||
3264 | ; delete FAT chain |
||
3265 | call clear_cluster_chain |
||
2643 | clevermous | 3266 | jc .device_err4 |
2288 | clevermous | 3267 | ; save directory |
3268 | mov eax, [esp+12] |
||
3269 | push ebx |
||
2643 | clevermous | 3270 | lea ebx, [ebp+FAT.buffer] |
3271 | call fs_write32_sys |
||
2288 | clevermous | 3272 | pop ebx |
2643 | clevermous | 3273 | test eax, eax |
2288 | clevermous | 3274 | jnz .device_err4 |
3275 | ; zero last sector, ignore errors |
||
3276 | pop ecx |
||
3277 | pop eax |
||
3278 | dec ecx |
||
2643 | clevermous | 3279 | imul ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
3280 | add ecx, [ebp+FAT.DATA_START] |
||
2288 | clevermous | 3281 | push eax |
3282 | sar eax, 9 |
||
3283 | add ecx, eax |
||
3284 | pop eax |
||
3285 | and eax, 0x1FF |
||
3286 | jz .truncate_done |
||
3287 | push ebx eax |
||
3288 | mov eax, ecx |
||
2643 | clevermous | 3289 | lea ebx, [ebp+FAT.buffer] |
3290 | call fs_read32_app |
||
2288 | clevermous | 3291 | pop eax |
2643 | clevermous | 3292 | lea edi, [ebp+FAT.buffer+eax] |
2288 | clevermous | 3293 | push ecx |
3294 | mov ecx, 0x200 |
||
3295 | sub ecx, eax |
||
3296 | xor eax, eax |
||
3297 | rep stosb |
||
3298 | pop eax |
||
2643 | clevermous | 3299 | call fs_write32_app |
2288 | clevermous | 3300 | pop ebx |
3301 | .truncate_done: |
||
3302 | pop ecx eax edi |
||
3303 | call update_disk |
||
2643 | clevermous | 3304 | call fat_unlock |
2288 | clevermous | 3305 | xor eax, eax |
3306 | ret |
||
2643 | clevermous | 3307 | .error_fat: |
3308 | pop eax |
||
6468 | pathoswith | 3309 | mov byte [esp], ERROR_FS_FAIL |
2643 | clevermous | 3310 | jmp .pop_ret |
3311 | .error_fat2: |
||
3312 | pop eax ecx eax edi |
||
3313 | call update_disk |
||
3314 | call fat_unlock |
||
6468 | pathoswith | 3315 | movi eax, ERROR_FS_FAIL |
2643 | clevermous | 3316 | ret |
2288 | clevermous | 3317 | |
2643 | clevermous | 3318 | ;---------------------------------------------------------------- |
3319 | fat_GetFileInfo: |
||
2288 | clevermous | 3320 | cmp byte [esi], 0 |
3321 | jnz @f |
||
3322 | mov eax, 2 |
||
3323 | ret |
||
3324 | @@: |
||
3325 | push edi |
||
2643 | clevermous | 3326 | call fat_lock |
6468 | pathoswith | 3327 | call hd_find_lfn |
2643 | clevermous | 3328 | jc .error |
3329 | push ebp |
||
3330 | xor ebp, ebp |
||
3331 | mov esi, [ebx+16] |
||
3332 | mov dword [esi+4], ebp |
||
3333 | call fat_entry_to_bdfe2 |
||
3334 | pop ebp |
||
3335 | call fat_unlock |
||
3336 | xor eax, eax |
||
2288 | clevermous | 3337 | pop edi |
3338 | ret |
||
2643 | clevermous | 3339 | .error: |
3340 | push eax |
||
3341 | call fat_unlock |
||
3342 | pop eax |
||
3343 | pop edi |
||
3344 | ret |
||
2288 | clevermous | 3345 | |
2643 | clevermous | 3346 | ;---------------------------------------------------------------- |
3347 | fat_SetFileInfo: |
||
2288 | clevermous | 3348 | cmp byte [esi], 0 |
3349 | jnz @f |
||
3350 | mov eax, 2 |
||
3351 | ret |
||
3352 | @@: |
||
3353 | push edi |
||
2643 | clevermous | 3354 | call fat_lock |
6468 | pathoswith | 3355 | call hd_find_lfn |
2643 | clevermous | 3356 | jc .error |
2288 | clevermous | 3357 | push eax |
2643 | clevermous | 3358 | mov edx, [ebx+16] |
2288 | clevermous | 3359 | call bdfe_to_fat_entry |
3360 | pop eax |
||
2643 | clevermous | 3361 | lea ebx, [ebp+FAT.buffer] |
3362 | call fs_write32_sys |
||
2288 | clevermous | 3363 | call update_disk |
2643 | clevermous | 3364 | call fat_unlock |
2288 | clevermous | 3365 | pop edi |
3366 | xor eax, eax |
||
3367 | ret |
||
2643 | clevermous | 3368 | .error: |
3369 | push eax |
||
3370 | call fat_unlock |
||
3371 | pop eax |
||
3372 | pop edi |
||
3373 | ret |
||
2288 | clevermous | 3374 | |
3375 | ;---------------------------------------------------------------- |
||
2643 | clevermous | 3376 | fat_Delete: |
3377 | call fat_lock |
||
2288 | clevermous | 3378 | cmp byte [esi], 0 |
3379 | jnz @f |
||
3380 | ; cannot delete root! |
||
3381 | .access_denied: |
||
3382 | push ERROR_ACCESS_DENIED |
||
2643 | clevermous | 3383 | .pop_ret: |
3384 | call fat_unlock |
||
3385 | pop eax |
||
3386 | xor ebx, ebx |
||
3387 | ret |
||
2288 | clevermous | 3388 | @@: |
2643 | clevermous | 3389 | and [ebp+FAT.longname_sec1], 0 |
3390 | and [ebp+FAT.longname_sec2], 0 |
||
2288 | clevermous | 3391 | push edi |
6468 | pathoswith | 3392 | call hd_find_lfn |
2288 | clevermous | 3393 | jnc .found |
3394 | pop edi |
||
3395 | push ERROR_FILE_NOT_FOUND |
||
3396 | jmp .pop_ret |
||
3397 | .found: |
||
3398 | cmp dword [edi], '. ' |
||
3399 | jz .access_denied2 |
||
3400 | cmp dword [edi], '.. ' |
||
3401 | jz .access_denied2 |
||
3402 | test byte [edi+11], 10h |
||
3403 | jz .dodel |
||
3404 | ; we can delete only empty folders! |
||
3405 | pushad |
||
2643 | clevermous | 3406 | mov esi, [edi+20-2] |
3407 | mov si, [edi+26] |
||
2288 | clevermous | 3408 | xor ecx, ecx |
2643 | clevermous | 3409 | lea eax, [esi-2] |
3410 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
3411 | add eax, [ebp+FAT.DATA_START] |
||
3412 | lea ebx, [ebp+FAT.buffer] |
||
3413 | call fs_read32_sys |
||
3414 | test eax, eax |
||
2288 | clevermous | 3415 | jnz .err1 |
2643 | clevermous | 3416 | lea eax, [ebx+0x200] |
2288 | clevermous | 3417 | add ebx, 2*0x20 |
3418 | .checkempty: |
||
3419 | cmp byte [ebx], 0 |
||
3420 | jz .empty |
||
3421 | cmp byte [ebx], 0xE5 |
||
3422 | jnz .notempty |
||
3423 | add ebx, 0x20 |
||
2643 | clevermous | 3424 | cmp ebx, eax |
2288 | clevermous | 3425 | jb .checkempty |
3426 | inc ecx |
||
2643 | clevermous | 3427 | cmp ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 3428 | jb @f |
2643 | clevermous | 3429 | mov eax, esi |
2288 | clevermous | 3430 | call get_FAT |
2643 | clevermous | 3431 | jc .err1 |
3174 | clevermous | 3432 | cmp eax, 2 |
3433 | jb .error_fat |
||
3434 | cmp eax, [ebp+FAT.fatRESERVED] |
||
3435 | jae .empty |
||
2643 | clevermous | 3436 | mov esi, eax |
2288 | clevermous | 3437 | xor ecx, ecx |
3438 | @@: |
||
2643 | clevermous | 3439 | lea eax, [esi-2] |
3440 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
3441 | add eax, [ebp+FAT.DATA_START] |
||
2288 | clevermous | 3442 | add eax, ecx |
2643 | clevermous | 3443 | lea ebx, [ebp+FAT.buffer] |
3444 | call fs_read32_sys |
||
3445 | test eax, eax |
||
3446 | lea eax, [ebx+0x200] |
||
2288 | clevermous | 3447 | jz .checkempty |
3448 | .err1: |
||
3449 | popad |
||
3450 | .err2: |
||
3451 | pop edi |
||
2643 | clevermous | 3452 | call fat_unlock |
3598 | clevermous | 3453 | movi eax, ERROR_DEVICE |
2288 | clevermous | 3454 | ret |
3174 | clevermous | 3455 | .error_fat: |
3456 | popad |
||
3457 | pop edi |
||
3458 | call fat_unlock |
||
6468 | pathoswith | 3459 | movi eax, ERROR_FS_FAIL |
3174 | clevermous | 3460 | ret |
2288 | clevermous | 3461 | .notempty: |
3462 | popad |
||
3463 | .access_denied2: |
||
3464 | pop edi |
||
2643 | clevermous | 3465 | call fat_unlock |
3598 | clevermous | 3466 | movi eax, ERROR_ACCESS_DENIED |
2288 | clevermous | 3467 | ret |
3468 | .empty: |
||
3469 | popad |
||
2643 | clevermous | 3470 | push eax ebx |
3471 | lea ebx, [ebp+FAT.buffer] |
||
3472 | call fs_read32_sys |
||
3473 | test eax, eax |
||
3474 | pop ebx eax |
||
2288 | clevermous | 3475 | jnz .err2 |
3476 | .dodel: |
||
3477 | push eax |
||
3478 | mov eax, [edi+20-2] |
||
3479 | mov ax, [edi+26] |
||
3480 | xchg eax, [esp] |
||
3481 | ; delete folder entry |
||
3482 | mov byte [edi], 0xE5 |
||
3483 | ; delete LFN (if present) |
||
3484 | .lfndel: |
||
2643 | clevermous | 3485 | lea edx, [ebp+FAT.buffer] |
3486 | cmp edi, edx |
||
2288 | clevermous | 3487 | ja @f |
2643 | clevermous | 3488 | cmp [ebp+FAT.longname_sec2], 0 |
2288 | clevermous | 3489 | jz .lfndone |
2643 | clevermous | 3490 | push [ebp+FAT.longname_sec2] |
3491 | push [ebp+FAT.longname_sec1] |
||
3492 | pop [ebp+FAT.longname_sec2] |
||
3493 | and [ebp+FAT.longname_sec1], 0 |
||
2288 | clevermous | 3494 | push ebx |
2643 | clevermous | 3495 | mov ebx, edx |
3496 | call fs_write32_sys |
||
2288 | clevermous | 3497 | mov eax, [esp+4] |
2643 | clevermous | 3498 | call fs_read32_sys |
2288 | clevermous | 3499 | pop ebx |
3500 | pop eax |
||
2643 | clevermous | 3501 | lea edi, [ebp+FAT.buffer+0x200] |
2288 | clevermous | 3502 | @@: |
3503 | sub edi, 0x20 |
||
3504 | cmp byte [edi], 0xE5 |
||
3505 | jz .lfndone |
||
3506 | cmp byte [edi+11], 0xF |
||
3507 | jnz .lfndone |
||
3508 | mov byte [edi], 0xE5 |
||
3509 | jmp .lfndel |
||
3510 | .lfndone: |
||
3511 | push ebx |
||
2643 | clevermous | 3512 | lea ebx, [ebp+FAT.buffer] |
3513 | call fs_write32_sys |
||
2288 | clevermous | 3514 | pop ebx |
3515 | ; delete FAT chain |
||
3516 | pop eax |
||
3517 | call clear_cluster_chain |
||
3518 | call update_disk |
||
2643 | clevermous | 3519 | call fat_unlock |
2288 | clevermous | 3520 | pop edi |
3521 | xor eax, eax |
||
3522 | ret=>=>=>=>=>=>>65536 |