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Rev | Author | Line No. | Line |
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2288 | clevermous | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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5363 | yogev_ezra | 3 | ;; Copyright (C) KolibriOS team 2004-2015. All rights reserved. ;; |
2288 | clevermous | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
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6 | ;; FAT32.INC ;; |
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7 | ;; ;; |
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4273 | clevermous | 8 | ;; FAT functions for KolibriOS ;; |
2288 | clevermous | 9 | ;; ;; |
10 | ;; Copyright 2002 Paolo Minazzi, paolo.minazzi@inwind.it ;; |
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11 | ;; ;; |
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12 | ;; See file COPYING for details ;; |
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13 | ;; 04.02.2007 LFN create folder - diamond ;; |
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14 | ;; 08.10.2006 LFN delete file/folder - diamond ;; |
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15 | ;; 20.08.2006 LFN set file size (truncate/extend) - diamond ;; |
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16 | ;; 17.08.2006 LFN write/append to file - diamond ;; |
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17 | ;; 23.06.2006 LFN start application - diamond ;; |
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18 | ;; 15.06.2006 LFN get/set file/folder info - diamond ;; |
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19 | ;; 27.05.2006 LFN create/rewrite file - diamond ;; |
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20 | ;; 04.05.2006 LFN read folder - diamond ;; |
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21 | ;; 29.04.2006 Elimination of hangup after the ;; |
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22 | ;; expiration hd_wait_timeout - Mario79 ;; |
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23 | ;; 23.04.2006 LFN read file - diamond ;; |
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24 | ;; 28.01.2006 find all Fat16/32 partition in all input point ;; |
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25 | ;; to MBR, see file part_set.inc - Mario79 ;; |
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26 | ;; 15.01.2005 get file size/attr/date, file_append - ATV ;; |
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27 | ;; 04.12.2004 skip volume label, file delete bug fixed - ATV ;; |
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28 | ;; 29.11.2004 get_free_FAT changed, append dir bug fixed - ATV ;; |
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29 | ;; 23.11.2004 don't allow overwrite dir with file - ATV ;; |
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30 | ;; 18.11.2004 get_disk_info and more error codes - ATV ;; |
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31 | ;; 17.11.2004 set_FAT/get_FAT and disk cache rewritten - ATV ;; |
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32 | ;; 10.11.2004 removedir clear whole directory structure - ATV ;; |
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33 | ;; 08.11.2004 rename - ATV ;; |
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34 | ;; 30.10.2004 file_read return also dirsize in bytes - ATV ;; |
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35 | ;; 20.10.2004 Makedir/Removedir - ATV ;; |
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36 | ;; 14.10.2004 Partition chain/Fat16 - ATV (thanks drh3xx) ;; |
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37 | ;; 06.9.2004 Fix free space by Mario79 added - MH ;; |
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38 | ;; 24.5.2004 Write back buffer for File_write -VT ;; |
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39 | ;; 20.5.2004 File_read function to work with syscall 58 - VT ;; |
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40 | ;; 30.3.2004 Error parameters at function return - VT ;; |
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41 | ;; 01.5.2002 Bugfix in device write - VT ;; |
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42 | ;; 20.5.2002 Hd status check - VT ;; |
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43 | ;; 29.6.2002 Improved fat32 verification - VT ;; |
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44 | ;; ;; |
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45 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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46 | |||
47 | $Revision: 5363 $ |
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48 | |||
49 | |||
50 | cache_max equ 1919 ; max. is 1919*512+0x610000=0x6ffe00 |
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51 | |||
52 | PUSHAD_EAX equ [esp+28] |
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53 | PUSHAD_ECX equ [esp+24] |
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54 | PUSHAD_EDX equ [esp+20] |
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55 | PUSHAD_EBX equ [esp+16] |
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56 | PUSHAD_EBP equ [esp+8] |
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57 | PUSHAD_ESI equ [esp+4] |
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58 | PUSHAD_EDI equ [esp+0] |
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59 | |||
2643 | clevermous | 60 | ; Internal data for every FAT partition. |
3742 | clevermous | 61 | struct FAT PARTITION |
2643 | clevermous | 62 | fs_type db ? |
63 | fat16_root db 0 ; flag for fat16 rootdir |
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64 | fat_change db 0 ; 1=fat has changed |
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65 | db ? ; alignment |
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66 | Lock MUTEX ? ; currently operations with one partition |
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3742 | clevermous | 67 | ; can not be executed in parallel since the |
68 | ; legacy code is not ready; this mutex guards |
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69 | ; all operations |
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2643 | clevermous | 70 | SECTORS_PER_FAT dd 0x1f3a |
71 | NUMBER_OF_FATS dd 0x2 |
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72 | SECTORS_PER_CLUSTER dd 0x8 |
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73 | BYTES_PER_SECTOR dd 0x200 ; Note: if BPS <> 512 need lots of changes |
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74 | ROOT_CLUSTER dd 2 ; first rootdir cluster |
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75 | FAT_START dd 0 ; start of fat table |
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76 | ROOT_START dd 0 ; start of rootdir (only fat16) |
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77 | ROOT_SECTORS dd 0 ; count of rootdir sectors (only fat16) |
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78 | DATA_START dd 0 ; start of data area (=first cluster 2) |
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79 | LAST_CLUSTER dd 0 ; last availabe cluster |
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80 | ADR_FSINFO dd 0 ; used only by fat32 |
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81 | |||
82 | fatRESERVED dd 0x0FFFFFF6 |
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83 | fatBAD dd 0x0FFFFFF7 |
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84 | fatEND dd 0x0FFFFFF8 |
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85 | fatMASK dd 0x0FFFFFFF |
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86 | |||
87 | fatStartScan dd 2 |
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88 | |||
89 | cluster_tmp dd 0 ; used by analyze_directory |
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90 | ; and analyze_directory_to_write |
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91 | |||
92 | longname_sec1 dd 0 ; used by analyze_directory to save 2 previous |
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93 | longname_sec2 dd 0 ; directory sectors for delete long filename |
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94 | |||
95 | fat_in_cache dd -1 |
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96 | |||
4273 | clevermous | 97 | ; For FAT16/FAT32, this points to 512-byte buffer for the current sector of FAT. |
98 | ; For FAT12, the entire FAT structure is read |
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99 | ; and unpacked from 12bit per cluster to word per cluster. |
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100 | ; |
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101 | ; Note: work with unpacked copy of FAT12 means |
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102 | ; additional memory and additional code for packing/unpacking. |
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103 | ; I'm not sure that the economy justifies the cost, but anyway, |
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104 | ; there is how work was done before my edits, and I'm just keeping the principle. |
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105 | fat_cache_ptr dd ? |
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106 | fat12_unpacked_ptr dd ? |
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2643 | clevermous | 107 | buffer rb 512 |
108 | fsinfo_buffer rb 512 |
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109 | ends |
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110 | |||
2288 | clevermous | 111 | uglobal |
112 | align 4 |
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113 | partition_count dd 0 ; partitions found by set_FAT32_variables |
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114 | |||
115 | hd_error dd 0 ; set by wait_for_sector_buffer |
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116 | hd_setup dd 0 |
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117 | hd_wait_timeout dd 0 |
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118 | |||
119 | cache_search_start dd 0 ; used by find_empty_slot |
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120 | endg |
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121 | |||
122 | uglobal |
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123 | align 4 |
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124 | Sector512: ; label for dev_hdcd.inc |
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125 | buffer: |
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2643 | clevermous | 126 | times 512 db 0 |
2288 | clevermous | 127 | endg |
128 | |||
2643 | clevermous | 129 | iglobal |
130 | align 4 |
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131 | fat_user_functions: |
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4273 | clevermous | 132 | dd fat_free |
2643 | clevermous | 133 | dd (fat_user_functions_end - fat_user_functions - 4) / 4 |
134 | dd fat_Read |
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135 | dd fat_ReadFolder |
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136 | dd fat_Rewrite |
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137 | dd fat_Write |
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138 | dd fat_SetFileEnd |
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139 | dd fat_GetFileInfo |
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140 | dd fat_SetFileInfo |
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141 | dd 0 |
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142 | dd fat_Delete |
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143 | dd fat_CreateFolder |
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144 | fat_user_functions_end: |
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2288 | clevermous | 145 | endg |
146 | |||
2643 | clevermous | 147 | ; these labels are located before the main function to make |
148 | ; most of jumps to these be short |
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149 | fat_create_partition.free_return0: |
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150 | mov eax, ebp |
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151 | call free |
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152 | pop ebp |
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153 | fat_create_partition.return0: |
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154 | xor eax, eax |
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155 | ret |
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156 | fat_create_partition: |
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5089 | clevermous | 157 | ; sector size must be 512 |
158 | cmp dword [esi+DISK.MediaInfo.SectorSize], 512 |
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159 | jnz .return0 |
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2643 | clevermous | 160 | ; bootsector must have been successfully read |
3742 | clevermous | 161 | cmp dword [esp+4], 0 |
2643 | clevermous | 162 | jnz .return0 |
163 | ; bootsector signature must be correct |
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164 | cmp word [ebx+0x1fe], 0xaa55 |
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165 | jnz .return0 |
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166 | ; sectors per cluster must be nonzero |
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167 | cmp byte [ebx+0xd], 0 |
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168 | jz .return0 |
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169 | ; bytes per sector must be 0x200 |
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170 | cmp word [ebx+0xb], 0x200 |
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171 | jnz .return0 |
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172 | ; number of fats must be nonzero |
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173 | cmp byte [ebx+0x10], 0 |
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174 | jz .return0 |
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175 | ; The only reason to be invalid partition now is FAT12. Since the test for |
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176 | ; FAT size requires knowledge of some calculated values, which are also used |
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177 | ; in the normal operation, let's hope for the best and allocate data now; if |
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178 | ; it will prove wrong, just deallocate it. |
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3598 | clevermous | 179 | movi eax, sizeof.FAT |
2643 | clevermous | 180 | call malloc |
181 | test eax, eax |
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182 | jz .return0 |
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3742 | clevermous | 183 | mov ecx, dword [ebp+PARTITION.FirstSector] |
184 | mov dword [eax+FAT.FirstSector], ecx |
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185 | mov ecx, dword [ebp+PARTITION.FirstSector+4] |
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186 | mov dword [eax+FAT.FirstSector+4], ecx |
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187 | mov ecx, dword [ebp+PARTITION.Length] |
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188 | mov dword [eax+FAT.Length], ecx |
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189 | mov ecx, dword [ebp+PARTITION.Length+4] |
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190 | mov dword [eax+FAT.Length+4], ecx |
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191 | mov ecx, [ebp+PARTITION.Disk] |
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192 | mov [eax+FAT.Disk], ecx |
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193 | mov [eax+FAT.FSUserFunctions], fat_user_functions |
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2643 | clevermous | 194 | or [eax+FAT.fat_in_cache], -1 |
195 | mov [eax+FAT.fat_change], 0 |
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196 | push ebp |
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197 | mov ebp, eax |
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2288 | clevermous | 198 | |
2643 | clevermous | 199 | lea ecx, [ebp+FAT.Lock] |
200 | call mutex_init |
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2288 | clevermous | 201 | |
2643 | clevermous | 202 | movzx eax, word [ebx+0xe] ; sectors reserved |
203 | mov [ebp+FAT.FAT_START], eax |
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2288 | clevermous | 204 | |
2643 | clevermous | 205 | movzx eax, byte [ebx+0xd] ; sectors per cluster |
206 | mov [ebp+FAT.SECTORS_PER_CLUSTER], eax |
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2288 | clevermous | 207 | |
2643 | clevermous | 208 | movzx ecx, word [ebx+0xb] ; bytes per sector |
209 | mov [ebp+FAT.BYTES_PER_SECTOR], ecx |
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2288 | clevermous | 210 | |
2643 | clevermous | 211 | movzx eax, word [ebx+0x11] ; count of rootdir entries (=0 fat32) |
212 | shl eax, 5 ; mul 32 |
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213 | dec ecx |
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214 | add eax, ecx ; round up if not equal count |
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215 | inc ecx ; bytes per sector |
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216 | xor edx, edx |
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217 | div ecx |
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218 | mov [ebp+FAT.ROOT_SECTORS], eax ; count of rootdir sectors |
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2288 | clevermous | 219 | |
2643 | clevermous | 220 | movzx eax, word [ebx+0x16] ; sectors per fat <65536 |
221 | test eax, eax |
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222 | jnz @f |
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223 | mov eax, [ebx+0x24] ; sectors per fat |
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2288 | clevermous | 224 | @@: |
2643 | clevermous | 225 | mov [ebp+FAT.SECTORS_PER_FAT], eax |
226 | |||
227 | movzx eax, byte [ebx+0x10] ; number of fats |
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228 | mov [ebp+FAT.NUMBER_OF_FATS], eax |
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4273 | clevermous | 229 | mul [ebp+FAT.SECTORS_PER_FAT] |
230 | test edx, edx |
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231 | jnz .free_return0 |
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2643 | clevermous | 232 | add eax, [ebp+FAT.FAT_START] |
4273 | clevermous | 233 | jc .free_return0 |
2643 | clevermous | 234 | mov [ebp+FAT.ROOT_START], eax ; rootdir = fat_start + fat_size * fat_count |
235 | add eax, [ebp+FAT.ROOT_SECTORS] ; rootdir sectors should be 0 on fat32 |
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4273 | clevermous | 236 | jc .free_return0 |
2643 | clevermous | 237 | mov [ebp+FAT.DATA_START], eax ; data area = rootdir + rootdir_size |
238 | |||
239 | movzx eax, word [ebx+0x13] ; total sector count <65536 |
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240 | test eax, eax |
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241 | jnz @f |
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242 | mov eax, [ebx+0x20] ; total sector count |
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243 | @@: |
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4273 | clevermous | 244 | ; total sector count must not exceed partition size |
245 | cmp dword [ebp+FAT.Length+4], 0 |
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246 | jnz @f |
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247 | cmp eax, dword [ebp+FAT.Length] |
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248 | ja .free_return0 |
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249 | @@: |
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3742 | clevermous | 250 | mov dword [ebp+FAT.Length], eax |
251 | and dword [ebp+FAT.Length+4], 0 |
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2643 | clevermous | 252 | sub eax, [ebp+FAT.DATA_START] ; eax = count of data sectors |
4273 | clevermous | 253 | jc .free_return0 |
2643 | clevermous | 254 | xor edx, edx |
255 | div [ebp+FAT.SECTORS_PER_CLUSTER] |
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256 | inc eax |
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257 | mov [ebp+FAT.LAST_CLUSTER], eax |
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258 | dec eax ; cluster count |
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4273 | clevermous | 259 | jz .free_return0 |
2643 | clevermous | 260 | mov [ebp+FAT.fatStartScan], 2 |
261 | |||
262 | ; limits by Microsoft Hardware White Paper v1.03 |
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263 | cmp eax, 4085 ; 0xff5 |
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4273 | clevermous | 264 | jb .fat12 |
2643 | clevermous | 265 | cmp eax, 65525 ; 0xfff5 |
266 | jb .fat16 |
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267 | .fat32: |
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268 | mov eax, [ebx+0x2c] ; rootdir cluster |
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269 | mov [ebp+FAT.ROOT_CLUSTER], eax |
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270 | movzx eax, word [ebx+0x30] |
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271 | mov [ebp+FAT.ADR_FSINFO], eax |
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272 | push ebx |
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273 | add ebx, 512 |
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274 | call fs_read32_sys |
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275 | test eax, eax |
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276 | jnz @f |
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277 | mov eax, [ebx+0x1ec] |
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278 | cmp eax, -1 |
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2288 | clevermous | 279 | jz @f |
2643 | clevermous | 280 | mov [ebp+FAT.fatStartScan], eax |
2288 | clevermous | 281 | @@: |
2643 | clevermous | 282 | pop ebx |
283 | mov [ebp+FAT.fatRESERVED], 0x0FFFFFF6 |
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284 | mov [ebp+FAT.fatBAD], 0x0FFFFFF7 |
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285 | mov [ebp+FAT.fatEND], 0x0FFFFFF8 |
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286 | mov [ebp+FAT.fatMASK], 0x0FFFFFFF |
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287 | mov al, 32 |
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4273 | clevermous | 288 | .fat_not_12_finalize: |
2643 | clevermous | 289 | mov [ebp+FAT.fs_type], al |
4273 | clevermous | 290 | ; For FAT16 and FAT32, allocate 512 bytes for FAT cache. |
291 | mov eax, 512 |
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292 | call malloc |
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293 | test eax, eax |
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294 | jz .free_return0 |
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295 | mov [ebp+FAT.fat_cache_ptr], eax |
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2643 | clevermous | 296 | mov eax, ebp |
297 | pop ebp |
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2288 | clevermous | 298 | ret |
2643 | clevermous | 299 | .fat16: |
300 | and [ebp+FAT.ROOT_CLUSTER], 0 |
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301 | mov [ebp+FAT.fatRESERVED], 0x0000FFF6 |
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302 | mov [ebp+FAT.fatBAD], 0x0000FFF7 |
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303 | mov [ebp+FAT.fatEND], 0x0000FFF8 |
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304 | mov [ebp+FAT.fatMASK], 0x0000FFFF |
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305 | mov al, 16 |
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4273 | clevermous | 306 | jmp .fat_not_12_finalize |
307 | .fat12: |
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308 | and [ebp+FAT.ROOT_CLUSTER], 0 |
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309 | mov [ebp+FAT.fatRESERVED], 0xFF6 |
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310 | mov [ebp+FAT.fatBAD], 0xFF7 |
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311 | mov [ebp+FAT.fatEND], 0xFFF |
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312 | mov [ebp+FAT.fatMASK], 0xFFF |
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313 | mov al, 12 |
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2643 | clevermous | 314 | mov [ebp+FAT.fs_type], al |
4273 | clevermous | 315 | ; For FAT12, allocate&read data for entire table: |
316 | ; calculate A = ALIGN_UP(NUM_CLUSTERS, 8), |
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317 | ; calculatefatchain/restorefatchain will process A items, |
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318 | ; allocate ALIGN_UP(A*3/2, 512) bytes for FAT table plus A*2 bytes for unpacked data. |
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319 | mov eax, [ebp+FAT.LAST_CLUSTER] |
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320 | and eax, not 7 |
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321 | add eax, 8 |
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322 | mov edx, eax |
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323 | lea eax, [eax*3] |
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324 | add eax, 512*2-1 |
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325 | shr eax, 10 |
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326 | shl eax, 9 |
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327 | lea eax, [eax+edx*2] |
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328 | call malloc |
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329 | test eax, eax |
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330 | jz .free_return0 |
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331 | ; Read ALIGN_UP(NUM_CLUSTERS*3/2, 512) bytes. |
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332 | ; Note that this can be less than allocated, this is ok, |
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333 | ; overallocation simplifies calculatefatchain/restorefatchain. |
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334 | push ebx |
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335 | mov [ebp+FAT.fat_cache_ptr], eax |
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336 | mov edx, [ebp+FAT.LAST_CLUSTER] |
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337 | lea edx, [(edx+1)*3 + 512*2-1] |
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338 | shr edx, 10 |
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339 | xchg eax, ebx |
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340 | xor eax, eax |
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341 | .read_fat: |
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342 | push eax |
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343 | add eax, [ebp+FAT.FAT_START] |
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344 | call fs_read32_sys |
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345 | test eax, eax |
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346 | pop eax |
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347 | jz @f |
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348 | dbgstr 'Failed to read FAT table' |
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349 | mov eax, [ebp+FAT.fat_cache_ptr] |
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350 | call free |
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351 | pop ebx |
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352 | jmp .free_return0 |
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353 | @@: |
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354 | add ebx, 512 |
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355 | inc eax |
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356 | cmp eax, edx |
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357 | jb .read_fat |
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358 | mov [ebp+FAT.fat12_unpacked_ptr], ebx |
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359 | call calculatefatchain |
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360 | pop ebx |
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2643 | clevermous | 361 | mov eax, ebp |
362 | pop ebp |
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2288 | clevermous | 363 | ret |
364 | |||
4273 | clevermous | 365 | fat_free: |
366 | push eax |
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367 | mov eax, [eax+FAT.fat_cache_ptr] |
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368 | call free |
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369 | pop eax |
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370 | jmp free |
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371 | |||
372 | calculatefatchain: |
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373 | |||
374 | pushad |
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375 | |||
376 | mov esi, [ebp+FAT.fat_cache_ptr] |
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377 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
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378 | |||
379 | mov edx, [ebp+FAT.LAST_CLUSTER] |
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380 | and edx, not 7 |
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381 | lea edx, [edi+(edx+8)*2] |
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382 | push edx |
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383 | |||
384 | fcnew: |
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385 | mov eax, dword [esi] |
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386 | mov ebx, dword [esi+4] |
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387 | mov ecx, dword [esi+8] |
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388 | mov edx, ecx |
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389 | shr edx, 4;8 ok |
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390 | shr dx, 4;7 ok |
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391 | xor ch, ch |
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392 | shld ecx, ebx, 20;6 ok |
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393 | shr cx, 4;5 ok |
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394 | shld ebx, eax, 12 |
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395 | and ebx, 0x0fffffff;4 ok |
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396 | shr bx, 4;3 ok |
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397 | shl eax, 4 |
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398 | and eax, 0x0fffffff;2 ok |
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399 | shr ax, 4;1 ok |
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400 | mov dword [edi], eax |
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401 | mov dword [edi+4], ebx |
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402 | mov dword [edi+8], ecx |
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403 | mov dword [edi+12], edx |
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404 | add edi, 16 |
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405 | add esi, 12 |
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406 | |||
407 | cmp edi, [esp] |
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408 | jnz fcnew |
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409 | pop eax |
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410 | |||
411 | popad |
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412 | ret |
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413 | |||
414 | |||
415 | restorefatchain: ; restore fat chain |
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416 | |||
417 | pushad |
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418 | |||
419 | mov esi, [ebp+FAT.fat12_unpacked_ptr] |
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420 | mov edi, [ebp+FAT.fat_cache_ptr] |
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421 | |||
422 | mov edx, [ebp+FAT.LAST_CLUSTER] |
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423 | and edx, not 7 |
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424 | lea edx, [esi+(edx+8)*2] |
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425 | |||
426 | fcnew2: |
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427 | mov eax, dword [esi] |
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428 | mov ebx, dword [esi+4] |
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429 | shl ax, 4 |
||
430 | shl eax, 4 |
||
431 | shl bx, 4 |
||
432 | shr ebx, 4 |
||
433 | shrd eax, ebx, 8 |
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434 | shr ebx, 8 |
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435 | mov dword [edi], eax |
||
436 | mov word [edi+4], bx |
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437 | add edi, 6 |
||
438 | add esi, 8 |
||
439 | |||
440 | cmp esi, edx |
||
441 | jb fcnew2 |
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442 | |||
443 | mov esi, [ebp+FAT.NUMBER_OF_FATS] |
||
444 | mov edx, [ebp+FAT.LAST_CLUSTER] |
||
445 | lea edx, [(edx+1)*3 + 512*2-1] |
||
446 | shr edx, 10 |
||
447 | push [ebp+FAT.FAT_START] |
||
448 | |||
449 | .write_fats: |
||
450 | xor eax, eax |
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451 | mov ebx, [ebp+FAT.fat_cache_ptr] |
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452 | .loop1: |
||
453 | push eax |
||
454 | add eax, [esp+4] |
||
455 | call fs_write32_sys |
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456 | test eax, eax |
||
457 | pop eax |
||
458 | jnz .fail |
||
459 | add ebx, 512 |
||
460 | inc eax |
||
461 | cmp eax, edx |
||
462 | jb .loop1 |
||
463 | pop eax |
||
464 | add eax, [ebp+FAT.SECTORS_PER_FAT] |
||
465 | push eax |
||
466 | dec esi |
||
467 | jnz .write_fats |
||
468 | pop eax |
||
469 | |||
470 | popad |
||
471 | ret |
||
472 | .fail: |
||
473 | dbgstr 'Failed to save FAT' |
||
474 | popad |
||
475 | ret |
||
476 | |||
477 | iglobal |
||
478 | label fat_legal_chars byte |
||
479 | ; 0 = not allowed |
||
480 | ; 1 = allowed only in long names |
||
481 | ; 3 = allowed |
||
482 | times 32 db 0 |
||
483 | ; ! " # $ % & ' ( ) * + , - . / |
||
484 | db 1,3,0,3,3,3,3,3,3,3,0,1,1,3,3,0 |
||
485 | ; 0 1 2 3 4 5 6 7 8 9 : ; < = > ? |
||
486 | db 3,3,3,3,3,3,3,3,3,3,0,1,0,1,0,0 |
||
487 | ; @ A B C D E F G H I J K L M N O |
||
488 | db 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 |
||
489 | ; P Q R S T U V W X Y Z [ \ ] ^ _ |
||
490 | db 3,3,3,3,3,3,3,3,3,3,3,1,0,1,3,3 |
||
491 | ; ` a b c d e f g h i j k l m n o |
||
492 | db 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 |
||
493 | ; p q r s t u v w x y z { | } ~ |
||
494 | db 3,3,3,3,3,3,3,3,3,3,3,3,0,3,3,0 |
||
495 | endg |
||
496 | |||
497 | fat_name_is_legal: |
||
498 | ; in: esi->(long) name |
||
499 | ; out: CF set <=> legal |
||
500 | ; destroys eax |
||
501 | push esi |
||
502 | xor eax, eax |
||
503 | @@: |
||
504 | lodsb |
||
505 | test al, al |
||
506 | jz .done |
||
507 | cmp al, 80h |
||
508 | jae .big |
||
509 | test [fat_legal_chars+eax], 1 |
||
510 | jnz @b |
||
511 | .err: |
||
512 | pop esi |
||
513 | clc |
||
514 | ret |
||
515 | .big: |
||
516 | ; 0x80-0xAF, 0xE0-0xEF |
||
517 | cmp al, 0xB0 |
||
518 | jb @b |
||
519 | cmp al, 0xE0 |
||
520 | jb .err |
||
521 | cmp al, 0xF0 |
||
522 | jb @b |
||
523 | jmp .err |
||
524 | .done: |
||
525 | sub esi, [esp] |
||
526 | cmp esi, 257 |
||
527 | pop esi |
||
528 | ret |
||
529 | |||
530 | fat_next_short_name: |
||
531 | ; in: edi->8+3 name |
||
532 | ; out: name corrected |
||
533 | ; CF=1 <=> error |
||
534 | pushad |
||
535 | mov ecx, 8 |
||
536 | mov al, '~' |
||
537 | std |
||
538 | push edi |
||
539 | add edi, 7 |
||
540 | repnz scasb |
||
541 | pop edi |
||
542 | cld |
||
543 | jz .tilde |
||
544 | ; tilde is not found, insert "~1" at end |
||
545 | add edi, 6 |
||
546 | cmp word [edi], ' ' |
||
547 | jnz .insert_tilde |
||
548 | @@: |
||
549 | dec edi |
||
550 | cmp byte [edi], ' ' |
||
551 | jz @b |
||
552 | inc edi |
||
553 | .insert_tilde: |
||
554 | mov word [edi], '~1' |
||
555 | popad |
||
556 | clc |
||
557 | ret |
||
558 | .tilde: |
||
559 | push edi |
||
560 | add edi, 7 |
||
561 | xor ecx, ecx |
||
562 | @@: |
||
563 | ; after tilde may be only digits and trailing spaces |
||
564 | cmp byte [edi], '~' |
||
565 | jz .break |
||
566 | cmp byte [edi], ' ' |
||
567 | jz .space |
||
568 | cmp byte [edi], '9' |
||
569 | jnz .found |
||
570 | dec edi |
||
571 | jmp @b |
||
572 | .space: |
||
573 | dec edi |
||
574 | inc ecx |
||
575 | jmp @b |
||
576 | .found: |
||
577 | inc byte [edi] |
||
578 | add dword [esp], 8 |
||
579 | jmp .zerorest |
||
580 | .break: |
||
581 | jecxz .noplace |
||
582 | inc edi |
||
583 | mov al, '1' |
||
584 | @@: |
||
585 | xchg al, [edi] |
||
586 | inc edi |
||
587 | cmp al, ' ' |
||
588 | mov al, '0' |
||
589 | jnz @b |
||
590 | .succ: |
||
591 | pop edi |
||
592 | popad |
||
593 | clc |
||
594 | ret |
||
595 | .noplace: |
||
596 | dec edi |
||
597 | cmp edi, [esp] |
||
598 | jz .err |
||
599 | add dword [esp], 8 |
||
600 | mov word [edi], '~1' |
||
601 | inc edi |
||
602 | inc edi |
||
603 | @@: |
||
604 | mov byte [edi], '0' |
||
605 | .zerorest: |
||
606 | inc edi |
||
607 | cmp edi, [esp] |
||
608 | jb @b |
||
609 | pop edi |
||
610 | popad |
||
611 | ;clc ; automatically |
||
612 | ret |
||
613 | .err: |
||
614 | pop edi |
||
615 | popad |
||
616 | stc |
||
617 | ret |
||
618 | |||
619 | fat_gen_short_name: |
||
620 | ; in: esi->long name |
||
621 | ; edi->buffer (8+3=11 chars) |
||
622 | ; out: buffer filled |
||
623 | pushad |
||
624 | mov eax, ' ' |
||
625 | push edi |
||
626 | stosd |
||
627 | stosd |
||
628 | stosd |
||
629 | pop edi |
||
630 | xor eax, eax |
||
631 | movi ebx, 8 |
||
632 | lea ecx, [edi+8] |
||
633 | .loop: |
||
634 | lodsb |
||
635 | test al, al |
||
636 | jz .done |
||
637 | call char_toupper |
||
638 | cmp al, ' ' |
||
639 | jz .space |
||
640 | cmp al, 80h |
||
641 | ja .big |
||
642 | test [fat_legal_chars+eax], 2 |
||
643 | jnz .symbol |
||
644 | .inv_symbol: |
||
645 | mov al, '_' |
||
646 | or bh, 1 |
||
647 | .symbol: |
||
648 | cmp al, '.' |
||
649 | jz .dot |
||
650 | .normal_symbol: |
||
651 | dec bl |
||
652 | jns .store |
||
653 | mov bl, 0 |
||
654 | .space: |
||
655 | or bh, 1 |
||
656 | jmp .loop |
||
657 | .store: |
||
658 | stosb |
||
659 | jmp .loop |
||
660 | .big: |
||
661 | cmp al, 0xB0 |
||
662 | jb .normal_symbol |
||
663 | cmp al, 0xE0 |
||
664 | jb .inv_symbol |
||
665 | cmp al, 0xF0 |
||
666 | jb .normal_symbol |
||
667 | jmp .inv_symbol |
||
668 | .dot: |
||
669 | test bh, 2 |
||
670 | jz .firstdot |
||
671 | pop ebx |
||
672 | add ebx, edi |
||
673 | sub ebx, ecx |
||
674 | push ebx |
||
675 | cmp ebx, ecx |
||
676 | jb @f |
||
677 | pop ebx |
||
678 | push ecx |
||
679 | @@: |
||
680 | cmp edi, ecx |
||
681 | jbe .skip |
||
682 | @@: |
||
683 | dec edi |
||
684 | mov al, [edi] |
||
685 | dec ebx |
||
686 | mov [ebx], al |
||
687 | mov byte [edi], ' ' |
||
688 | cmp edi, ecx |
||
689 | ja @b |
||
690 | .skip: |
||
691 | mov bh, 3 |
||
692 | jmp @f |
||
693 | .firstdot: |
||
694 | cmp bl, 8 |
||
695 | jz .space |
||
696 | push edi |
||
697 | or bh, 2 |
||
698 | @@: |
||
699 | mov edi, ecx |
||
700 | mov bl, 3 |
||
701 | jmp .loop |
||
702 | .done: |
||
703 | test bh, 2 |
||
704 | jz @f |
||
705 | pop edi |
||
706 | @@: |
||
707 | lea edi, [ecx-8] |
||
708 | test bh, 1 |
||
709 | jz @f |
||
710 | call fat_next_short_name |
||
711 | @@: |
||
712 | popad |
||
713 | ret |
||
714 | |||
715 | fat12_free_space: |
||
716 | ;--------------------------------------------- |
||
717 | ; |
||
718 | ; returns free space in edi |
||
719 | ; rewr.by Mihasik |
||
720 | ;--------------------------------------------- |
||
721 | |||
722 | push eax ebx ecx |
||
723 | |||
724 | mov edi, [ebp+FAT.fat12_unpacked_ptr];start of FAT |
||
725 | xor ax, ax;Free cluster=0x0000 in FAT |
||
726 | xor ebx, ebx;counter |
||
727 | mov ecx, [ebp+FAT.LAST_CLUSTER] |
||
728 | inc ecx |
||
729 | cld |
||
730 | rdfs1: |
||
731 | repne scasw |
||
732 | jnz rdfs2 ;if last cluster not 0 |
||
733 | inc ebx |
||
734 | test ecx, ecx |
||
735 | jnz rdfs1 |
||
736 | rdfs2: |
||
737 | shl ebx, 9;free clusters*512 |
||
738 | mov edi, ebx |
||
739 | |||
740 | pop ecx ebx eax |
||
741 | ret |
||
742 | |||
743 | |||
744 | |||
2288 | clevermous | 745 | set_FAT: |
746 | ;-------------------------------- |
||
747 | ; input : EAX = cluster |
||
748 | ; EDX = value to save |
||
2643 | clevermous | 749 | ; EBP = pointer to FAT structure |
2288 | clevermous | 750 | ; output : EDX = old value |
751 | ;-------------------------------- |
||
2643 | clevermous | 752 | ; out: CF set <=> error |
2288 | clevermous | 753 | push eax ebx esi |
754 | |||
755 | cmp eax, 2 |
||
756 | jb sfc_error |
||
2643 | clevermous | 757 | cmp eax, [ebp+FAT.LAST_CLUSTER] |
2288 | clevermous | 758 | ja sfc_error |
4273 | clevermous | 759 | cmp [ebp+FAT.fs_type], 12 |
760 | je set_FAT12 |
||
2643 | clevermous | 761 | cmp [ebp+FAT.fs_type], 16 |
2288 | clevermous | 762 | je sfc_1 |
763 | add eax, eax |
||
764 | sfc_1: |
||
765 | add eax, eax |
||
766 | mov esi, 511 |
||
767 | and esi, eax ; esi = position in fat sector |
||
768 | shr eax, 9 ; eax = fat sector |
||
2643 | clevermous | 769 | add eax, [ebp+FAT.FAT_START] |
4273 | clevermous | 770 | mov ebx, [ebp+FAT.fat_cache_ptr] |
2288 | clevermous | 771 | |
2643 | clevermous | 772 | cmp eax, [ebp+FAT.fat_in_cache]; is fat sector already in memory? |
2288 | clevermous | 773 | je sfc_in_cache ; yes |
774 | |||
2643 | clevermous | 775 | cmp [ebp+FAT.fat_change], 0; is fat changed? |
2288 | clevermous | 776 | je sfc_no_change ; no |
777 | call write_fat_sector; yes. write it into disk |
||
2643 | clevermous | 778 | jc sfc_error |
2288 | clevermous | 779 | |
780 | sfc_no_change: |
||
2643 | clevermous | 781 | mov [ebp+FAT.fat_in_cache], eax; save fat sector |
782 | call fs_read32_sys |
||
783 | test eax, eax |
||
2288 | clevermous | 784 | jne sfc_error |
785 | |||
786 | |||
787 | sfc_in_cache: |
||
2643 | clevermous | 788 | cmp [ebp+FAT.fs_type], 16 |
2288 | clevermous | 789 | jne sfc_test32 |
790 | |||
791 | sfc_set16: |
||
792 | xchg [ebx+esi], dx ; save new value and get old value |
||
793 | jmp sfc_write |
||
794 | |||
795 | sfc_test32: |
||
2643 | clevermous | 796 | mov eax, [ebp+FAT.fatMASK] |
2288 | clevermous | 797 | |
798 | sfc_set32: |
||
799 | and edx, eax |
||
800 | xor eax, -1 ; mask for high bits |
||
801 | and eax, [ebx+esi] ; get high 4 bits |
||
802 | or eax, edx |
||
803 | mov edx, [ebx+esi] ; get old value |
||
804 | mov [ebx+esi], eax ; save new value |
||
805 | |||
806 | sfc_write: |
||
2643 | clevermous | 807 | mov [ebp+FAT.fat_change], 1; fat has changed |
2288 | clevermous | 808 | |
809 | sfc_nonzero: |
||
2643 | clevermous | 810 | and edx, [ebp+FAT.fatMASK] |
2288 | clevermous | 811 | |
2643 | clevermous | 812 | sfc_return: |
2288 | clevermous | 813 | pop esi ebx eax |
814 | ret |
||
2643 | clevermous | 815 | sfc_error: |
816 | stc |
||
817 | jmp sfc_return |
||
2288 | clevermous | 818 | |
4273 | clevermous | 819 | set_FAT12: |
820 | test edx, 0xF000 |
||
821 | jnz sfc_error |
||
822 | mov ebx, [ebp+FAT.fat12_unpacked_ptr] |
||
823 | xchg [ebx+eax*2], dx |
||
824 | mov [ebp+FAT.fat_change], 1 |
||
825 | pop esi ebx eax |
||
826 | clc |
||
827 | ret |
||
2288 | clevermous | 828 | |
829 | get_FAT: |
||
830 | ;-------------------------------- |
||
831 | ; input : EAX = cluster |
||
2643 | clevermous | 832 | ; EBP = pointer to FAT structure |
2288 | clevermous | 833 | ; output : EAX = next cluster |
834 | ;-------------------------------- |
||
2643 | clevermous | 835 | ; out: CF set <=> error |
2288 | clevermous | 836 | push ebx esi |
837 | |||
4273 | clevermous | 838 | cmp [ebp+FAT.fs_type], 12 |
839 | je get_FAT12 |
||
840 | |||
2643 | clevermous | 841 | cmp [ebp+FAT.fs_type], 16 |
2288 | clevermous | 842 | je gfc_1 |
843 | add eax, eax |
||
844 | gfc_1: |
||
845 | add eax, eax |
||
846 | mov esi, 511 |
||
847 | and esi, eax ; esi = position in fat sector |
||
848 | shr eax, 9 ; eax = fat sector |
||
2643 | clevermous | 849 | add eax, [ebp+FAT.FAT_START] |
4273 | clevermous | 850 | mov ebx, [ebp+FAT.fat_cache_ptr] |
2288 | clevermous | 851 | |
2643 | clevermous | 852 | cmp eax, [ebp+FAT.fat_in_cache]; is fat sector already in memory? |
2288 | clevermous | 853 | je gfc_in_cache |
854 | |||
2643 | clevermous | 855 | cmp [ebp+FAT.fat_change], 0; is fat changed? |
2288 | clevermous | 856 | je gfc_no_change ; no |
857 | call write_fat_sector; yes. write it into disk |
||
2643 | clevermous | 858 | jc hd_error_01 |
2288 | clevermous | 859 | |
860 | gfc_no_change: |
||
2643 | clevermous | 861 | mov [ebp+FAT.fat_in_cache], eax |
862 | call fs_read32_sys |
||
863 | test eax, eax |
||
2288 | clevermous | 864 | jne hd_error_01 |
865 | |||
866 | gfc_in_cache: |
||
867 | mov eax, [ebx+esi] |
||
2643 | clevermous | 868 | and eax, [ebp+FAT.fatMASK] |
869 | gfc_return: |
||
2288 | clevermous | 870 | pop esi ebx |
871 | ret |
||
2643 | clevermous | 872 | hd_error_01: |
873 | stc |
||
874 | jmp gfc_return |
||
2288 | clevermous | 875 | |
4273 | clevermous | 876 | get_FAT12: |
877 | mov ebx, [ebp+FAT.fat12_unpacked_ptr] |
||
878 | movzx eax, word [ebx+eax*2] |
||
879 | pop esi ebx |
||
880 | clc |
||
881 | ret |
||
2288 | clevermous | 882 | |
4273 | clevermous | 883 | |
2288 | clevermous | 884 | get_free_FAT: |
885 | ;----------------------------------------------------------- |
||
886 | ; output : if CARRY=0 EAX = # first cluster found free |
||
887 | ; if CARRY=1 disk full |
||
888 | ; Note : for more speed need to use fat_cache directly |
||
889 | ;----------------------------------------------------------- |
||
890 | push ecx |
||
2643 | clevermous | 891 | mov ecx, [ebp+FAT.LAST_CLUSTER]; counter for full disk |
892 | mov eax, [ebp+FAT.fatStartScan] |
||
4273 | clevermous | 893 | cmp [ebp+FAT.fs_type], 12 |
894 | jz get_free_FAT12 |
||
895 | dec ecx |
||
2288 | clevermous | 896 | cmp eax, 2 |
897 | jb gff_reset |
||
898 | |||
899 | gff_test: |
||
2643 | clevermous | 900 | cmp eax, [ebp+FAT.LAST_CLUSTER]; if above last cluster start at cluster 2 |
2288 | clevermous | 901 | jbe gff_in_range |
902 | gff_reset: |
||
903 | mov eax, 2 |
||
904 | |||
905 | gff_in_range: |
||
906 | push eax |
||
907 | call get_FAT ; get cluster state |
||
2643 | clevermous | 908 | jc gff_not_found_1 |
2288 | clevermous | 909 | |
910 | test eax, eax ; is it free? |
||
911 | pop eax |
||
912 | je gff_found ; yes |
||
913 | inc eax ; next cluster |
||
914 | dec ecx ; is all checked? |
||
4273 | clevermous | 915 | jnz gff_test ; no |
2288 | clevermous | 916 | |
917 | gff_not_found: |
||
918 | pop ecx ; yes. disk is full |
||
919 | stc |
||
920 | ret |
||
921 | |||
2643 | clevermous | 922 | gff_not_found_1: |
923 | pop eax |
||
924 | jmp gff_not_found |
||
925 | |||
2288 | clevermous | 926 | gff_found: |
927 | lea ecx, [eax+1] |
||
2643 | clevermous | 928 | mov [ebp+FAT.fatStartScan], ecx |
2288 | clevermous | 929 | pop ecx |
930 | clc |
||
931 | ret |
||
932 | |||
4273 | clevermous | 933 | get_free_FAT12: |
934 | push edx edi |
||
935 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
||
936 | cmp eax, 2 |
||
937 | jb .reset |
||
938 | cmp eax, ecx |
||
939 | jbe @f |
||
940 | .reset: |
||
941 | mov eax, 2 |
||
942 | @@: |
||
943 | mov edx, eax |
||
944 | lea edi, [edi+eax*2] |
||
945 | sub ecx, eax |
||
946 | inc ecx |
||
947 | xor eax, eax |
||
948 | repnz scasw |
||
949 | jz .found |
||
950 | cmp edx, 2 |
||
951 | jz .notfound |
||
952 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
||
953 | lea ecx, [edx-2] |
||
954 | repnz scasw |
||
955 | jnz .notfound |
||
956 | .found: |
||
957 | sub edi, [ebp+FAT.fat12_unpacked_ptr] |
||
958 | shr edi, 1 |
||
959 | mov [ebp+FAT.fatStartScan], edi |
||
960 | lea eax, [edi-1] |
||
961 | pop edi edx ecx |
||
962 | ret |
||
963 | .notfound: |
||
964 | pop edi edx ecx |
||
965 | stc |
||
966 | ret |
||
2288 | clevermous | 967 | |
4273 | clevermous | 968 | |
2288 | clevermous | 969 | write_fat_sector: |
970 | ;----------------------------------------------------------- |
||
971 | ; write changed fat to disk |
||
972 | ;----------------------------------------------------------- |
||
973 | push eax ebx ecx |
||
974 | |||
2643 | clevermous | 975 | mov [ebp+FAT.fat_change], 0 |
976 | mov eax, [ebp+FAT.fat_in_cache] |
||
2288 | clevermous | 977 | cmp eax, -1 |
978 | jz write_fat_not_used |
||
4273 | clevermous | 979 | mov ebx, [ebp+FAT.fat_cache_ptr] |
2643 | clevermous | 980 | mov ecx, [ebp+FAT.NUMBER_OF_FATS] |
2288 | clevermous | 981 | |
982 | write_next_fat: |
||
2643 | clevermous | 983 | push eax |
984 | call fs_write32_sys |
||
985 | test eax, eax |
||
986 | pop eax |
||
987 | jnz write_fat_not_used |
||
2288 | clevermous | 988 | |
2643 | clevermous | 989 | add eax, [ebp+FAT.SECTORS_PER_FAT] |
2288 | clevermous | 990 | dec ecx |
991 | jnz write_next_fat |
||
992 | |||
993 | write_fat_not_used: |
||
994 | pop ecx ebx eax |
||
995 | ret |
||
996 | |||
997 | |||
998 | |||
999 | |||
1000 | |||
1001 | bcd2bin: |
||
1002 | ;---------------------------------- |
||
1003 | ; input : AL=BCD number (eg. 0x11) |
||
1004 | ; output : AH=0 |
||
1005 | ; AL=decimal number (eg. 11) |
||
1006 | ;---------------------------------- |
||
1007 | xor ah, ah |
||
1008 | shl ax, 4 |
||
1009 | shr al, 4 |
||
1010 | aad |
||
1011 | ret |
||
1012 | |||
1013 | |||
1014 | get_date_for_file: |
||
1015 | ;----------------------------------------------------- |
||
1016 | ; Get date from CMOS and pack day,month,year in AX |
||
1017 | ; DATE bits 0..4 : day of month 0..31 |
||
1018 | ; 5..8 : month of year 1..12 |
||
1019 | ; 9..15 : count of years from 1980 |
||
1020 | ;----------------------------------------------------- |
||
1021 | mov al, 0x7 ;day |
||
1022 | out 0x70, al |
||
1023 | in al, 0x71 |
||
1024 | call bcd2bin |
||
1025 | ror eax, 5 |
||
1026 | |||
1027 | mov al, 0x8 ;month |
||
1028 | out 0x70, al |
||
1029 | in al, 0x71 |
||
1030 | call bcd2bin |
||
1031 | ror eax, 4 |
||
1032 | |||
1033 | mov al, 0x9 ;year |
||
1034 | out 0x70, al |
||
1035 | in al, 0x71 |
||
1036 | call bcd2bin |
||
1037 | add ax, 20 ;because CMOS return only the two last |
||
1038 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
||
1039 | rol eax, 9 ;need the difference with 1980 (eg. 2001-1980) |
||
1040 | ret |
||
1041 | |||
1042 | |||
1043 | get_time_for_file: |
||
1044 | ;----------------------------------------------------- |
||
1045 | ; Get time from CMOS and pack hour,minute,second in AX |
||
1046 | ; TIME bits 0..4 : second (the low bit is lost) |
||
1047 | ; 5..10 : minute 0..59 |
||
1048 | ; 11..15 : hour 0..23 |
||
1049 | ;----------------------------------------------------- |
||
1050 | mov al, 0x0 ;second |
||
1051 | out 0x70, al |
||
1052 | in al, 0x71 |
||
1053 | call bcd2bin |
||
1054 | ror eax, 6 |
||
1055 | |||
1056 | mov al, 0x2 ;minute |
||
1057 | out 0x70, al |
||
1058 | in al, 0x71 |
||
1059 | call bcd2bin |
||
1060 | ror eax, 6 |
||
1061 | |||
1062 | mov al, 0x4 ;hour |
||
1063 | out 0x70, al |
||
1064 | in al, 0x71 |
||
1065 | call bcd2bin |
||
1066 | rol eax, 11 |
||
1067 | ret |
||
1068 | |||
1069 | |||
1070 | set_current_time_for_entry: |
||
1071 | ;----------------------------------------------------- |
||
1072 | ; Set current time/date for file entry |
||
1073 | ; input : ebx = file entry pointer |
||
1074 | ;----------------------------------------------------- |
||
1075 | push eax |
||
1076 | call get_time_for_file; update files date/time |
||
1077 | mov [ebx+22], ax |
||
1078 | call get_date_for_file |
||
1079 | mov [ebx+24], ax |
||
1080 | pop eax |
||
1081 | ret |
||
1082 | |||
1083 | |||
1084 | |||
1085 | add_disk_free_space: |
||
1086 | ;----------------------------------------------------- |
||
1087 | ; input : ecx = cluster count |
||
1088 | ; Note : negative = remove clusters from free space |
||
1089 | ; positive = add clusters to free space |
||
1090 | ;----------------------------------------------------- |
||
1091 | test ecx, ecx ; no change |
||
1092 | je add_dfs_no |
||
2643 | clevermous | 1093 | cmp [ebp+FAT.fs_type], 32 ; free disk space only used by fat32 |
2288 | clevermous | 1094 | jne add_dfs_no |
1095 | |||
1096 | push eax ebx |
||
2643 | clevermous | 1097 | mov eax, [ebp+FAT.ADR_FSINFO] |
1098 | lea ebx, [ebp+FAT.fsinfo_buffer] |
||
1099 | call fs_read32_sys |
||
1100 | test eax, eax |
||
1101 | jnz add_not_fs |
||
2288 | clevermous | 1102 | |
1103 | cmp dword [ebx+0x1fc], 0xaa550000; check sector id |
||
1104 | jne add_not_fs |
||
1105 | |||
1106 | add [ebx+0x1e8], ecx |
||
2643 | clevermous | 1107 | push [ebp+FAT.fatStartScan] |
2288 | clevermous | 1108 | pop dword [ebx+0x1ec] |
2643 | clevermous | 1109 | mov eax, [ebp+FAT.ADR_FSINFO] |
1110 | call fs_write32_sys |
||
1111 | ; jc add_not_fs |
||
2288 | clevermous | 1112 | |
1113 | add_not_fs: |
||
1114 | pop ebx eax |
||
1115 | |||
1116 | add_dfs_no: |
||
1117 | ret |
||
1118 | |||
1119 | |||
1120 | |||
1121 | clear_cluster_chain: |
||
1122 | ;----------------------------------------------------- |
||
1123 | ; input : eax = first cluster |
||
1124 | ;----------------------------------------------------- |
||
1125 | push eax ecx edx |
||
1126 | xor ecx, ecx ; cluster count |
||
1127 | |||
1128 | clean_new_chain: |
||
2643 | clevermous | 1129 | cmp eax, [ebp+FAT.LAST_CLUSTER]; end of file |
2288 | clevermous | 1130 | ja delete_OK |
1131 | cmp eax, 2 ; unfinished fat chain or zero length file |
||
1132 | jb delete_OK |
||
2643 | clevermous | 1133 | cmp eax, [ebp+FAT.ROOT_CLUSTER]; don't remove root cluster |
2288 | clevermous | 1134 | jz delete_OK |
1135 | |||
1136 | xor edx, edx |
||
1137 | call set_FAT ; clear fat entry |
||
2643 | clevermous | 1138 | jc access_denied_01 |
2288 | clevermous | 1139 | |
1140 | inc ecx ; update cluster count |
||
1141 | mov eax, edx ; old cluster |
||
1142 | jmp clean_new_chain |
||
1143 | |||
1144 | delete_OK: |
||
1145 | call add_disk_free_space; add clusters to free disk space |
||
2643 | clevermous | 1146 | clc |
2288 | clevermous | 1147 | access_denied_01: |
1148 | pop edx ecx eax |
||
1149 | ret |
||
1150 | |||
1151 | |||
2643 | clevermous | 1152 | if 0 |
2288 | clevermous | 1153 | get_hd_info: |
1154 | ;----------------------------------------------------------- |
||
1155 | ; output : eax = 0 - ok |
||
1156 | ; 3 - unknown FS |
||
1157 | ; 10 - access denied |
||
1158 | ; edx = cluster size in bytes |
||
1159 | ; ebx = total clusters on disk |
||
1160 | ; ecx = free clusters on disk |
||
1161 | ;----------------------------------------------------------- |
||
2643 | clevermous | 1162 | cmp [ebp+FAT.fs_type], 16 |
2288 | clevermous | 1163 | jz info_fat_ok |
2643 | clevermous | 1164 | cmp [ebp+FAT.fs_type], 32 |
2288 | clevermous | 1165 | jz info_fat_ok |
1166 | xor edx, edx |
||
1167 | xor ebx, ebx |
||
1168 | xor ecx, ecx |
||
1169 | mov eax, ERROR_UNKNOWN_FS |
||
1170 | ret |
||
1171 | |||
1172 | info_fat_ok: |
||
1173 | ; call reserve_hd1 |
||
1174 | |||
1175 | xor ecx, ecx ; count of free clusters |
||
1176 | mov eax, 2 |
||
2643 | clevermous | 1177 | mov ebx, [ebp+FAT.LAST_CLUSTER] |
2288 | clevermous | 1178 | |
1179 | info_cluster: |
||
1180 | push eax |
||
1181 | call get_FAT ; get cluster info |
||
2643 | clevermous | 1182 | jc info_access_denied |
2288 | clevermous | 1183 | |
1184 | test eax, eax ; is it free? |
||
1185 | jnz info_used ; no |
||
1186 | inc ecx |
||
1187 | |||
1188 | info_used: |
||
1189 | pop eax |
||
1190 | inc eax |
||
1191 | cmp eax, ebx ; is above last cluster? |
||
1192 | jbe info_cluster ; no. test next cluster |
||
1193 | |||
1194 | dec ebx ; cluster count |
||
2643 | clevermous | 1195 | imul edx, [ebp+FAT.SECTORS_PER_CLUSTER], 512; cluster size in bytes |
2288 | clevermous | 1196 | xor eax, eax |
1197 | ret |
||
1198 | |||
1199 | info_access_denied: |
||
1200 | add esp, 4 |
||
1201 | xor edx, edx |
||
1202 | xor ebx, ebx |
||
1203 | xor ecx, ecx |
||
1204 | mov eax, ERROR_ACCESS_DENIED |
||
1205 | ret |
||
2643 | clevermous | 1206 | end if |
2288 | clevermous | 1207 | |
1208 | update_disk: |
||
4273 | clevermous | 1209 | cmp [ebp+FAT.fat_change], 0 ; is fat changed? |
1210 | je upd_no_change |
||
1211 | cmp [ebp+FAT.fs_type], 12 |
||
1212 | jz .fat12 |
||
2288 | clevermous | 1213 | ;----------------------------------------------------------- |
1214 | ; write changed fat and cache to disk |
||
1215 | ;----------------------------------------------------------- |
||
1216 | |||
1217 | call write_fat_sector |
||
2643 | clevermous | 1218 | jc update_disk_acces_denied |
4273 | clevermous | 1219 | jmp upd_no_change |
1220 | .fat12: |
||
1221 | call restorefatchain |
||
1222 | mov [ebp+FAT.fat_change], 0 |
||
2288 | clevermous | 1223 | |
1224 | upd_no_change: |
||
1225 | |||
2643 | clevermous | 1226 | push esi |
1227 | mov esi, [ebp+PARTITION.Disk] |
||
1228 | call disk_sync |
||
1229 | pop esi |
||
2288 | clevermous | 1230 | update_disk_acces_denied: |
1231 | ret |
||
1232 | |||
2643 | clevermous | 1233 | fat_lock: |
1234 | lea ecx, [ebp+FAT.Lock] |
||
1235 | jmp mutex_lock |
||
1236 | fat_unlock: |
||
1237 | lea ecx, [ebp+FAT.Lock] |
||
1238 | jmp mutex_unlock |
||
2288 | clevermous | 1239 | |
1240 | ; \begin{diamond} |
||
4273 | clevermous | 1241 | uni2ansi_str: |
1242 | ; convert UNICODE zero-terminated string to ASCII-string (codepage 866) |
||
1243 | ; in: esi->source, edi->buffer (may be esi=edi) |
||
1244 | ; destroys: eax,esi,edi |
||
1245 | lodsw |
||
1246 | test ax, ax |
||
1247 | jz .done |
||
1248 | cmp ax, 0x80 |
||
1249 | jb .ascii |
||
1250 | cmp ax, 0x401 |
||
1251 | jz .yo1 |
||
1252 | cmp ax, 0x451 |
||
1253 | jz .yo2 |
||
1254 | cmp ax, 0x410 |
||
1255 | jb .unk |
||
1256 | cmp ax, 0x440 |
||
1257 | jb .rus1 |
||
1258 | cmp ax, 0x450 |
||
1259 | jb .rus2 |
||
1260 | .unk: |
||
1261 | mov al, '_' |
||
1262 | jmp .doit |
||
1263 | .yo1: |
||
1264 | mov al, 0xF0 ; 'Ё' |
||
1265 | jmp .doit |
||
1266 | .yo2: |
||
1267 | mov al, 0xF1 ; 'ё' |
||
1268 | jmp .doit |
||
1269 | .rus1: |
||
1270 | ; 0x410-0x43F -> 0x80-0xAF |
||
1271 | add al, 0x70 |
||
1272 | jmp .doit |
||
1273 | .rus2: |
||
1274 | ; 0x440-0x44F -> 0xE0-0xEF |
||
1275 | add al, 0xA0 |
||
1276 | .ascii: |
||
1277 | .doit: |
||
1278 | stosb |
||
1279 | jmp uni2ansi_str |
||
1280 | .done: |
||
1281 | mov byte [edi], 0 |
||
1282 | ret |
||
1283 | |||
1284 | ansi2uni_char: |
||
1285 | ; convert ANSI character in al to UNICODE character in ax, using cp866 encoding |
||
1286 | mov ah, 0 |
||
1287 | ; 0x00-0x7F - trivial map |
||
1288 | cmp al, 0x80 |
||
1289 | jb .ret |
||
1290 | ; 0x80-0xAF -> 0x410-0x43F |
||
1291 | cmp al, 0xB0 |
||
1292 | jae @f |
||
1293 | add ax, 0x410-0x80 |
||
1294 | .ret: |
||
1295 | ret |
||
1296 | @@: |
||
1297 | ; 0xE0-0xEF -> 0x440-0x44F |
||
1298 | cmp al, 0xE0 |
||
1299 | jb .unk |
||
1300 | cmp al, 0xF0 |
||
1301 | jae @f |
||
1302 | add ax, 0x440-0xE0 |
||
1303 | ret |
||
1304 | ; 0xF0 -> 0x401 |
||
1305 | ; 0xF1 -> 0x451 |
||
1306 | @@: |
||
1307 | cmp al, 0xF0 ; 'Ё' |
||
1308 | jz .yo1 |
||
1309 | cmp al, 0xF1 ; 'ё' |
||
1310 | jz .yo2 |
||
1311 | .unk: |
||
1312 | mov al, '_' ; ah=0 |
||
1313 | ret |
||
1314 | .yo1: |
||
1315 | mov ax, 0x401 |
||
1316 | ret |
||
1317 | .yo2: |
||
1318 | mov ax, 0x451 |
||
1319 | ret |
||
1320 | |||
1321 | char_toupper: |
||
1322 | ; convert character to uppercase, using cp866 encoding |
||
1323 | ; in: al=symbol |
||
1324 | ; out: al=converted symbol |
||
1325 | cmp al, 'a' |
||
1326 | jb .ret |
||
1327 | cmp al, 'z' |
||
1328 | jbe .az |
||
1329 | cmp al, 0xF1 ; 'ё' |
||
1330 | jz .yo1 |
||
1331 | cmp al, 0xA0 ; 'а' |
||
1332 | jb .ret |
||
1333 | cmp al, 0xE0 ; 'р' |
||
1334 | jb .rus1 |
||
1335 | cmp al, 0xEF ; 'я' |
||
1336 | ja .ret |
||
1337 | ; 0xE0-0xEF -> 0x90-0x9F |
||
1338 | sub al, 0xE0-0x90 |
||
1339 | .ret: |
||
1340 | ret |
||
1341 | .rus1: |
||
1342 | ; 0xA0-0xAF -> 0x80-0x8F |
||
1343 | .az: |
||
1344 | and al, not 0x20 |
||
1345 | ret |
||
1346 | .yo1: |
||
1347 | ; 0xF1 -> 0xF0 |
||
1348 | dec ax |
||
1349 | ret |
||
1350 | |||
1351 | fat_get_name: |
||
1352 | ; in: edi->FAT entry |
||
1353 | ; out: CF=1 - no valid entry |
||
1354 | ; else CF=0 and ebp->ASCIIZ-name |
||
1355 | ; (maximum length of filename is 255 (wide) symbols without trailing 0, |
||
1356 | ; but implementation requires buffer 261 words) |
||
1357 | ; destroys eax |
||
1358 | cmp byte [edi], 0 |
||
1359 | jz .no |
||
1360 | cmp byte [edi], 0xE5 |
||
1361 | jnz @f |
||
1362 | .no: |
||
1363 | stc |
||
1364 | ret |
||
1365 | @@: |
||
1366 | cmp byte [edi+11], 0xF |
||
1367 | jz .longname |
||
1368 | test byte [edi+11], 8 |
||
1369 | jnz .no |
||
1370 | push ecx |
||
1371 | push edi ebp |
||
1372 | test byte [ebp-4], 1 |
||
1373 | jnz .unicode_short |
||
1374 | |||
1375 | mov eax, [edi] |
||
1376 | mov ecx, [edi+4] |
||
1377 | mov [ebp], eax |
||
1378 | mov [ebp+4], ecx |
||
1379 | |||
1380 | mov ecx, 8 |
||
1381 | @@: |
||
1382 | cmp byte [ebp+ecx-1], ' ' |
||
1383 | loope @b |
||
1384 | |||
1385 | mov eax, [edi+8] |
||
1386 | cmp al, ' ' |
||
1387 | je .done |
||
1388 | shl eax, 8 |
||
1389 | mov al, '.' |
||
1390 | |||
1391 | lea ebp, [ebp+ecx+1] |
||
1392 | mov [ebp], eax |
||
1393 | mov ecx, 3 |
||
1394 | @@: |
||
1395 | rol eax, 8 |
||
1396 | cmp al, ' ' |
||
1397 | jne .done |
||
1398 | loop @b |
||
1399 | dec ebp |
||
1400 | .done: |
||
1401 | and byte [ebp+ecx+1], 0 ; CF=0 |
||
1402 | pop ebp edi ecx |
||
1403 | ret |
||
1404 | .unicode_short: |
||
1405 | mov ecx, 8 |
||
1406 | push ecx |
||
1407 | @@: |
||
1408 | mov al, [edi] |
||
1409 | inc edi |
||
1410 | call ansi2uni_char |
||
1411 | mov [ebp], ax |
||
1412 | inc ebp |
||
1413 | inc ebp |
||
1414 | loop @b |
||
1415 | pop ecx |
||
1416 | @@: |
||
1417 | cmp word [ebp-2], ' ' |
||
1418 | jnz @f |
||
1419 | dec ebp |
||
1420 | dec ebp |
||
1421 | loop @b |
||
1422 | @@: |
||
1423 | mov word [ebp], '.' |
||
1424 | inc ebp |
||
1425 | inc ebp |
||
1426 | mov ecx, 3 |
||
1427 | push ecx |
||
1428 | @@: |
||
1429 | mov al, [edi] |
||
1430 | inc edi |
||
1431 | call ansi2uni_char |
||
1432 | mov [ebp], ax |
||
1433 | inc ebp |
||
1434 | inc ebp |
||
1435 | loop @b |
||
1436 | pop ecx |
||
1437 | @@: |
||
1438 | cmp word [ebp-2], ' ' |
||
1439 | jnz @f |
||
1440 | dec ebp |
||
1441 | dec ebp |
||
1442 | loop @b |
||
1443 | dec ebp |
||
1444 | dec ebp |
||
1445 | @@: |
||
1446 | and word [ebp], 0 ; CF=0 |
||
1447 | pop ebp edi ecx |
||
1448 | ret |
||
1449 | .longname: |
||
1450 | ; LFN |
||
1451 | mov al, byte [edi] |
||
1452 | and eax, 0x3F |
||
1453 | dec eax |
||
1454 | cmp al, 20 |
||
1455 | jae .no ; ignore invalid entries |
||
1456 | mov word [ebp+260*2], 0 ; force null-terminating for orphans |
||
1457 | imul eax, 13*2 |
||
1458 | add ebp, eax |
||
1459 | test byte [edi], 0x40 |
||
1460 | jz @f |
||
1461 | mov word [ebp+13*2], 0 |
||
1462 | @@: |
||
1463 | push eax |
||
1464 | ; now copy name from edi to ebp ... |
||
1465 | mov eax, [edi+1] |
||
1466 | mov [ebp], eax ; symbols 1,2 |
||
1467 | mov eax, [edi+5] |
||
1468 | mov [ebp+4], eax ; 3,4 |
||
1469 | mov eax, [edi+9] |
||
1470 | mov [ebp+8], ax ; 5 |
||
1471 | mov eax, [edi+14] |
||
1472 | mov [ebp+10], eax ; 6,7 |
||
1473 | mov eax, [edi+18] |
||
1474 | mov [ebp+14], eax ; 8,9 |
||
1475 | mov eax, [edi+22] |
||
1476 | mov [ebp+18], eax ; 10,11 |
||
1477 | mov eax, [edi+28] |
||
1478 | mov [ebp+22], eax ; 12,13 |
||
1479 | ; ... done |
||
1480 | pop eax |
||
1481 | sub ebp, eax |
||
1482 | test eax, eax |
||
1483 | jz @f |
||
1484 | ; if this is not first entry, more processing required |
||
1485 | stc |
||
1486 | ret |
||
1487 | @@: |
||
1488 | ; if this is first entry: |
||
1489 | test byte [ebp-4], 1 |
||
1490 | jnz .ret |
||
1491 | ; buffer at ebp contains UNICODE name, convert it to ANSI |
||
1492 | push esi edi |
||
1493 | mov esi, ebp |
||
1494 | mov edi, ebp |
||
1495 | call uni2ansi_str |
||
1496 | pop edi esi |
||
1497 | .ret: |
||
1498 | clc |
||
1499 | ret |
||
1500 | |||
1501 | fat_compare_name: |
||
1502 | ; compares ASCIIZ-names, case-insensitive (cp866 encoding) |
||
1503 | ; in: esi->name, ebp->name |
||
1504 | ; out: if names match: ZF=1 and esi->next component of name |
||
1505 | ; else: ZF=0, esi is not changed |
||
1506 | ; destroys eax |
||
1507 | push ebp esi |
||
1508 | .loop: |
||
1509 | mov al, [ebp] |
||
1510 | inc ebp |
||
1511 | call char_toupper |
||
1512 | push eax |
||
1513 | lodsb |
||
1514 | call char_toupper |
||
1515 | cmp al, [esp] |
||
1516 | jnz .done |
||
1517 | pop eax |
||
1518 | test al, al |
||
1519 | jnz .loop |
||
1520 | dec esi |
||
1521 | pop eax |
||
1522 | pop ebp |
||
1523 | xor eax, eax ; set ZF flag |
||
1524 | ret |
||
1525 | .done: |
||
1526 | cmp al, '/' |
||
1527 | jnz @f |
||
1528 | cmp byte [esp], 0 |
||
1529 | jnz @f |
||
1530 | mov [esp+4], esi |
||
1531 | @@: |
||
1532 | pop eax |
||
1533 | pop esi ebp |
||
1534 | ret |
||
1535 | |||
1536 | fat_find_lfn: |
||
1537 | ; in: esi->name |
||
1538 | ; [esp+4] = next |
||
1539 | ; [esp+8] = first |
||
1540 | ; [esp+C]... - possibly parameters for first and next |
||
1541 | ; out: CF=1 - file not found, eax=error code |
||
1542 | ; else CF=0, esi->next name component, edi->direntry |
||
1543 | pusha |
||
1544 | lea eax, [esp+0Ch+20h] |
||
1545 | call dword [eax-4] |
||
1546 | jc .reterr |
||
1547 | sub esp, 262*2 ; reserve place for LFN |
||
1548 | push 0 ; for fat_get_name: read ASCII name |
||
1549 | .l1: |
||
1550 | lea ebp, [esp+4] |
||
1551 | call fat_get_name |
||
1552 | jc .l2 |
||
1553 | call fat_compare_name |
||
1554 | jz .found |
||
1555 | .l2: |
||
1556 | mov ebp, [esp+8+262*2+4] |
||
1557 | lea eax, [esp+0Ch+20h+262*2+4] |
||
1558 | call dword [eax-8] |
||
1559 | jnc .l1 |
||
1560 | add esp, 262*2+4 |
||
1561 | .reterr: |
||
1562 | mov [esp+28], eax |
||
1563 | stc |
||
1564 | popa |
||
1565 | ret |
||
1566 | .found: |
||
1567 | add esp, 262*2+4 |
||
1568 | mov ebp, [esp+8] |
||
1569 | ; if this is LFN entry, advance to true entry |
||
1570 | cmp byte [edi+11], 0xF |
||
1571 | jnz @f |
||
1572 | lea eax, [esp+0Ch+20h] |
||
1573 | call dword [eax-8] |
||
1574 | jc .reterr |
||
1575 | @@: |
||
1576 | add esp, 8 ; CF=0 |
||
1577 | push esi |
||
1578 | push edi |
||
1579 | popa |
||
1580 | ret |
||
1581 | |||
1582 | fat_time_to_bdfe: |
||
1583 | ; in: eax=FAT time |
||
1584 | ; out: eax=BDFE time |
||
1585 | push ecx edx |
||
1586 | mov ecx, eax |
||
1587 | mov edx, eax |
||
1588 | shr eax, 11 |
||
1589 | shl eax, 16 ; hours |
||
1590 | and edx, 0x1F |
||
1591 | add edx, edx |
||
1592 | mov al, dl ; seconds |
||
1593 | shr ecx, 5 |
||
1594 | and ecx, 0x3F |
||
1595 | mov ah, cl ; minutes |
||
1596 | pop edx ecx |
||
1597 | ret |
||
1598 | |||
1599 | fat_date_to_bdfe: |
||
1600 | push ecx edx |
||
1601 | mov ecx, eax |
||
1602 | mov edx, eax |
||
1603 | shr eax, 9 |
||
1604 | add ax, 1980 |
||
1605 | shl eax, 16 ; year |
||
1606 | and edx, 0x1F |
||
1607 | mov al, dl ; day |
||
1608 | shr ecx, 5 |
||
1609 | and ecx, 0xF |
||
1610 | mov ah, cl ; month |
||
1611 | pop edx ecx |
||
1612 | ret |
||
1613 | |||
1614 | bdfe_to_fat_time: |
||
1615 | push edx |
||
1616 | mov edx, eax |
||
1617 | shr eax, 16 |
||
1618 | and dh, 0x3F |
||
1619 | shl eax, 6 |
||
1620 | or al, dh |
||
1621 | shr dl, 1 |
||
1622 | and dl, 0x1F |
||
1623 | shl eax, 5 |
||
1624 | or al, dl |
||
1625 | pop edx |
||
1626 | ret |
||
1627 | |||
1628 | bdfe_to_fat_date: |
||
1629 | push edx |
||
1630 | mov edx, eax |
||
1631 | shr eax, 16 |
||
1632 | sub ax, 1980 |
||
1633 | and dh, 0xF |
||
1634 | shl eax, 4 |
||
1635 | or al, dh |
||
1636 | and dl, 0x1F |
||
1637 | shl eax, 5 |
||
1638 | or al, dl |
||
1639 | pop edx |
||
1640 | ret |
||
1641 | |||
1642 | fat_entry_to_bdfe: |
||
1643 | ; convert FAT entry at edi to BDFE (block of data of folder entry) at esi, advance esi |
||
1644 | ; destroys eax |
||
1645 | mov eax, [ebp-4] |
||
1646 | mov [esi+4], eax ; ASCII/UNICODE name |
||
1647 | fat_entry_to_bdfe2: |
||
1648 | movzx eax, byte [edi+11] |
||
1649 | mov [esi], eax ; attributes |
||
1650 | movzx eax, word [edi+14] |
||
1651 | call fat_time_to_bdfe |
||
1652 | mov [esi+8], eax ; creation time |
||
1653 | movzx eax, word [edi+16] |
||
1654 | call fat_date_to_bdfe |
||
1655 | mov [esi+12], eax ; creation date |
||
1656 | and dword [esi+16], 0 ; last access time is not supported on FAT |
||
1657 | movzx eax, word [edi+18] |
||
1658 | call fat_date_to_bdfe |
||
1659 | mov [esi+20], eax ; last access date |
||
1660 | movzx eax, word [edi+22] |
||
1661 | call fat_time_to_bdfe |
||
1662 | mov [esi+24], eax ; last write time |
||
1663 | movzx eax, word [edi+24] |
||
1664 | call fat_date_to_bdfe |
||
1665 | mov [esi+28], eax ; last write date |
||
1666 | mov eax, [edi+28] |
||
1667 | mov [esi+32], eax ; file size (low dword) |
||
1668 | xor eax, eax |
||
1669 | mov [esi+36], eax ; file size (high dword) |
||
1670 | test ebp, ebp |
||
1671 | jz .ret |
||
1672 | push ecx edi |
||
1673 | lea edi, [esi+40] |
||
1674 | mov esi, ebp |
||
1675 | test byte [esi-4], 1 |
||
1676 | jz .ansi |
||
1677 | mov ecx, 260/2 |
||
1678 | rep movsd |
||
1679 | mov [edi-2], ax |
||
1680 | @@: |
||
1681 | mov esi, edi |
||
1682 | pop edi ecx |
||
1683 | .ret: |
||
1684 | ret |
||
1685 | .ansi: |
||
1686 | mov ecx, 264/4 |
||
1687 | rep movsd |
||
1688 | mov [edi-1], al |
||
1689 | jmp @b |
||
1690 | |||
1691 | bdfe_to_fat_entry: |
||
1692 | ; convert BDFE at edx to FAT entry at edi |
||
1693 | ; destroys eax |
||
1694 | ; attributes byte |
||
1695 | test byte [edi+11], 8 ; volume label? |
||
1696 | jnz @f |
||
1697 | mov al, [edx] |
||
1698 | and al, 0x27 |
||
1699 | and byte [edi+11], 0x10 |
||
1700 | or byte [edi+11], al |
||
1701 | @@: |
||
1702 | mov eax, [edx+8] |
||
1703 | call bdfe_to_fat_time |
||
1704 | mov [edi+14], ax ; creation time |
||
1705 | mov eax, [edx+12] |
||
1706 | call bdfe_to_fat_date |
||
1707 | mov [edi+16], ax ; creation date |
||
1708 | mov eax, [edx+20] |
||
1709 | call bdfe_to_fat_date |
||
1710 | mov [edi+18], ax ; last access date |
||
1711 | mov eax, [edx+24] |
||
1712 | call bdfe_to_fat_time |
||
1713 | mov [edi+22], ax ; last write time |
||
1714 | mov eax, [edx+28] |
||
1715 | call bdfe_to_fat_date |
||
1716 | mov [edi+24], ax ; last write date |
||
1717 | ret |
||
1718 | |||
2288 | clevermous | 1719 | hd_find_lfn: |
2643 | clevermous | 1720 | ; in: ebp -> FAT structure |
1721 | ; in: esi+[esp+4] -> name |
||
1722 | ; out: CF=1 - file not found, eax=error code |
||
2288 | clevermous | 1723 | ; else CF=0 and edi->direntry, eax=sector |
1724 | ; destroys eax |
||
1725 | push esi edi |
||
1726 | push 0 |
||
1727 | push 0 |
||
4273 | clevermous | 1728 | push fat1x_root_first |
1729 | push fat1x_root_next |
||
2643 | clevermous | 1730 | mov eax, [ebp+FAT.ROOT_CLUSTER] |
1731 | cmp [ebp+FAT.fs_type], 32 |
||
2288 | clevermous | 1732 | jz .fat32 |
1733 | .loop: |
||
4273 | clevermous | 1734 | and [ebp+FAT.longname_sec1], 0 |
1735 | and [ebp+FAT.longname_sec2], 0 |
||
2288 | clevermous | 1736 | call fat_find_lfn |
1737 | jc .notfound |
||
1738 | cmp byte [esi], 0 |
||
1739 | jz .found |
||
1740 | .continue: |
||
1741 | test byte [edi+11], 10h |
||
1742 | jz .notfound |
||
1743 | and dword [esp+12], 0 |
||
1744 | mov eax, [edi+20-2] |
||
1745 | mov ax, [edi+26] ; cluster |
||
1746 | .fat32: |
||
1747 | mov [esp+8], eax |
||
1748 | mov dword [esp+4], fat_notroot_first |
||
1749 | mov dword [esp], fat_notroot_next |
||
1750 | jmp .loop |
||
1751 | .notfound: |
||
1752 | add esp, 16 |
||
1753 | pop edi esi |
||
1754 | stc |
||
2643 | clevermous | 1755 | ret 4 |
2288 | clevermous | 1756 | .found: |
2643 | clevermous | 1757 | lea eax, [esp+4+24] |
1758 | cmp dword [eax], 0 |
||
2288 | clevermous | 1759 | jz @f |
2643 | clevermous | 1760 | mov esi, [eax] |
1761 | and dword [eax], 0 |
||
2288 | clevermous | 1762 | jmp .continue |
1763 | @@: |
||
1764 | lea eax, [esp+8] |
||
1765 | cmp dword [eax], 0 |
||
1766 | jz .root |
||
1767 | call fat_get_sector |
||
1768 | jmp .cmn |
||
1769 | .root: |
||
1770 | mov eax, [eax+4] |
||
2643 | clevermous | 1771 | add eax, [ebp+FAT.ROOT_START] |
2288 | clevermous | 1772 | .cmn: |
1773 | add esp, 20 ; CF=0 |
||
1774 | pop esi |
||
2643 | clevermous | 1775 | ret 4 |
2288 | clevermous | 1776 | |
1777 | ;---------------------------------------------------------------- |
||
4273 | clevermous | 1778 | ; fat_Read - FAT implementation of reading a file |
2643 | clevermous | 1779 | ; in: ebp = pointer to FAT structure |
1780 | ; in: esi+[esp+4] = name |
||
1781 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
1782 | ; out: eax, ebx = return values for sysfunc 70 |
||
1783 | ;---------------------------------------------------------------- |
||
1784 | fat_Read: |
||
1785 | call fat_lock |
||
2288 | clevermous | 1786 | push edi |
1787 | cmp byte [esi], 0 |
||
1788 | jnz @f |
||
1789 | .noaccess: |
||
1790 | pop edi |
||
1791 | .noaccess_2: |
||
2643 | clevermous | 1792 | call fat_unlock |
2288 | clevermous | 1793 | or ebx, -1 |
1794 | mov eax, ERROR_ACCESS_DENIED |
||
1795 | ret |
||
1796 | |||
1797 | @@: |
||
2643 | clevermous | 1798 | stdcall hd_find_lfn, [esp+4+4] |
2288 | clevermous | 1799 | jnc .found |
1800 | pop edi |
||
2643 | clevermous | 1801 | push eax |
1802 | call fat_unlock |
||
1803 | pop eax |
||
2288 | clevermous | 1804 | or ebx, -1 |
1805 | ret |
||
1806 | |||
1807 | .found: |
||
1808 | test byte [edi+11], 0x10; do not allow read directories |
||
1809 | jnz .noaccess |
||
2643 | clevermous | 1810 | cmp dword [ebx+8], 0 |
2288 | clevermous | 1811 | jz @f |
1812 | xor ebx, ebx |
||
1813 | .reteof: |
||
2643 | clevermous | 1814 | call fat_unlock |
1815 | mov eax, ERROR_END_OF_FILE |
||
2288 | clevermous | 1816 | pop edi |
1817 | ret |
||
1818 | @@: |
||
2643 | clevermous | 1819 | mov ecx, [ebx+12] ; size |
1820 | mov edx, [ebx+16] ; pointer |
||
1821 | mov ebx, [ebx+4] ; file offset |
||
1822 | push edx |
||
2288 | clevermous | 1823 | push 0 |
1824 | mov eax, [edi+28] |
||
1825 | sub eax, ebx |
||
1826 | jb .eof |
||
1827 | cmp eax, ecx |
||
1828 | jae @f |
||
1829 | mov ecx, eax |
||
1830 | mov byte [esp], 6 |
||
1831 | @@: |
||
1832 | mov eax, [edi+20-2] |
||
1833 | mov ax, [edi+26] |
||
1834 | ; now eax=cluster, ebx=position, ecx=count, edx=buffer for data |
||
1835 | .new_cluster: |
||
1836 | jecxz .new_sector |
||
2643 | clevermous | 1837 | cmp eax, 2 |
1838 | jb .eof |
||
1839 | cmp eax, [ebp+FAT.fatRESERVED] |
||
2288 | clevermous | 1840 | jae .eof |
2643 | clevermous | 1841 | mov [ebp+FAT.cluster_tmp], eax |
2288 | clevermous | 1842 | dec eax |
1843 | dec eax |
||
2643 | clevermous | 1844 | mov edi, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 1845 | imul eax, edi |
2643 | clevermous | 1846 | add eax, [ebp+FAT.DATA_START] |
2288 | clevermous | 1847 | .new_sector: |
1848 | test ecx, ecx |
||
1849 | jz .done |
||
1850 | sub ebx, 512 |
||
1851 | jae .skip |
||
1852 | add ebx, 512 |
||
1853 | jnz .force_buf |
||
1854 | cmp ecx, 512 |
||
1855 | jb .force_buf |
||
1856 | ; we may read directly to given buffer |
||
2643 | clevermous | 1857 | push eax ebx |
2288 | clevermous | 1858 | mov ebx, edx |
2643 | clevermous | 1859 | call fs_read32_app |
1860 | test eax, eax |
||
1861 | pop ebx eax |
||
2288 | clevermous | 1862 | jne .noaccess_1 |
1863 | add edx, 512 |
||
1864 | sub ecx, 512 |
||
1865 | jmp .skip |
||
1866 | .force_buf: |
||
1867 | ; we must read sector to temporary buffer and then copy it to destination |
||
1868 | push eax ebx |
||
2643 | clevermous | 1869 | lea ebx, [ebp+FAT.buffer] |
1870 | call fs_read32_app |
||
1871 | test eax, eax |
||
2288 | clevermous | 1872 | mov eax, ebx |
1873 | pop ebx |
||
1874 | jne .noaccess_3 |
||
1875 | add eax, ebx |
||
1876 | push ecx |
||
1877 | add ecx, ebx |
||
1878 | cmp ecx, 512 |
||
1879 | jbe @f |
||
1880 | mov ecx, 512 |
||
1881 | @@: |
||
1882 | sub ecx, ebx |
||
1883 | mov ebx, edx |
||
1884 | call memmove |
||
1885 | add edx, ecx |
||
1886 | sub [esp], ecx |
||
1887 | pop ecx |
||
1888 | pop eax |
||
1889 | xor ebx, ebx |
||
1890 | .skip: |
||
1891 | inc eax |
||
1892 | dec edi |
||
1893 | jnz .new_sector |
||
2643 | clevermous | 1894 | mov eax, [ebp+FAT.cluster_tmp] |
2288 | clevermous | 1895 | call get_FAT |
2643 | clevermous | 1896 | jc .noaccess_1 |
2288 | clevermous | 1897 | |
1898 | jmp .new_cluster |
||
1899 | .noaccess_3: |
||
1900 | pop eax |
||
1901 | .noaccess_1: |
||
1902 | pop eax |
||
2643 | clevermous | 1903 | push ERROR_DEVICE |
2288 | clevermous | 1904 | .done: |
1905 | mov ebx, edx |
||
2643 | clevermous | 1906 | call fat_unlock |
1907 | pop eax edx edi |
||
2288 | clevermous | 1908 | sub ebx, edx |
1909 | ret |
||
1910 | .eof: |
||
1911 | mov ebx, edx |
||
2643 | clevermous | 1912 | pop eax edx |
2288 | clevermous | 1913 | sub ebx, edx |
1914 | jmp .reteof |
||
1915 | |||
1916 | ;---------------------------------------------------------------- |
||
4273 | clevermous | 1917 | ; fat_ReadFolder - FAT implementation of reading a folder |
2643 | clevermous | 1918 | ; in: ebp = pointer to FAT structure |
1919 | ; in: esi+[esp+4] = name |
||
1920 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
1921 | ; out: eax, ebx = return values for sysfunc 70 |
||
1922 | ;---------------------------------------------------------------- |
||
1923 | fat_ReadFolder: |
||
1924 | call fat_lock |
||
1925 | mov eax, [ebp+FAT.ROOT_CLUSTER] |
||
2288 | clevermous | 1926 | push edi |
1927 | cmp byte [esi], 0 |
||
1928 | jz .doit |
||
2643 | clevermous | 1929 | stdcall hd_find_lfn, [esp+4+4] |
2288 | clevermous | 1930 | jnc .found |
1931 | pop edi |
||
2643 | clevermous | 1932 | push eax |
1933 | call fat_unlock |
||
1934 | pop eax |
||
2288 | clevermous | 1935 | or ebx, -1 |
1936 | ret |
||
1937 | .found: |
||
1938 | test byte [edi+11], 0x10 ; do not allow read files |
||
1939 | jnz .found_dir |
||
1940 | pop edi |
||
2643 | clevermous | 1941 | call fat_unlock |
2288 | clevermous | 1942 | or ebx, -1 |
1943 | mov eax, ERROR_ACCESS_DENIED |
||
1944 | ret |
||
1945 | .found_dir: |
||
1946 | mov eax, [edi+20-2] |
||
1947 | mov ax, [edi+26] ; eax=cluster |
||
1948 | .doit: |
||
2643 | clevermous | 1949 | push esi |
2288 | clevermous | 1950 | sub esp, 262*2 ; reserve space for LFN |
2643 | clevermous | 1951 | push dword [ebx+8] ; for fat_get_name: read ANSI/UNICODE name |
1952 | mov edx, [ebx+16] ; pointer to buffer |
||
2288 | clevermous | 1953 | ; init header |
2643 | clevermous | 1954 | push eax |
2288 | clevermous | 1955 | mov edi, edx |
1956 | mov ecx, 32/4 |
||
1957 | xor eax, eax |
||
1958 | rep stosd |
||
2643 | clevermous | 1959 | pop eax |
2288 | clevermous | 1960 | mov byte [edx], 1 ; version |
1961 | mov esi, edi ; esi points to BDFE |
||
2643 | clevermous | 1962 | mov ecx, [ebx+12] ; number of blocks to read |
1963 | mov ebx, [ebx+4] ; index of the first block |
||
2288 | clevermous | 1964 | .new_cluster: |
2643 | clevermous | 1965 | mov [ebp+FAT.cluster_tmp], eax |
2288 | clevermous | 1966 | test eax, eax |
1967 | jnz @f |
||
2643 | clevermous | 1968 | cmp [ebp+FAT.fs_type], 32 |
2288 | clevermous | 1969 | jz .notfound |
2643 | clevermous | 1970 | mov eax, [ebp+FAT.ROOT_START] |
1971 | push [ebp+FAT.ROOT_SECTORS] |
||
2288 | clevermous | 1972 | push ebx |
1973 | jmp .new_sector |
||
1974 | @@: |
||
1975 | dec eax |
||
1976 | dec eax |
||
2643 | clevermous | 1977 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
1978 | push [ebp+FAT.SECTORS_PER_CLUSTER] |
||
1979 | add eax, [ebp+FAT.DATA_START] |
||
2288 | clevermous | 1980 | push ebx |
1981 | .new_sector: |
||
2643 | clevermous | 1982 | lea ebx, [ebp+FAT.buffer] |
2288 | clevermous | 1983 | mov edi, ebx |
2643 | clevermous | 1984 | push eax |
1985 | call fs_read32_sys |
||
1986 | test eax, eax |
||
1987 | pop eax |
||
2288 | clevermous | 1988 | jnz .notfound2 |
1989 | add ebx, 512 |
||
1990 | push eax |
||
1991 | .l1: |
||
2643 | clevermous | 1992 | push ebp |
1993 | lea ebp, [esp+20] |
||
2288 | clevermous | 1994 | call fat_get_name |
2643 | clevermous | 1995 | pop ebp |
2288 | clevermous | 1996 | jc .l2 |
1997 | cmp byte [edi+11], 0xF |
||
1998 | jnz .do_bdfe |
||
1999 | add edi, 0x20 |
||
2000 | cmp edi, ebx |
||
2001 | jb .do_bdfe |
||
2002 | pop eax |
||
2003 | inc eax |
||
2004 | dec dword [esp+4] |
||
2005 | jnz @f |
||
2643 | clevermous | 2006 | mov eax, [ebp+FAT.cluster_tmp] |
2288 | clevermous | 2007 | test eax, eax |
2008 | jz .done |
||
2009 | call get_FAT |
||
2643 | clevermous | 2010 | jc .notfound2 |
2288 | clevermous | 2011 | cmp eax, 2 |
2012 | jb .done |
||
2643 | clevermous | 2013 | cmp eax, [ebp+FAT.fatRESERVED] |
2288 | clevermous | 2014 | jae .done |
2015 | push eax |
||
2643 | clevermous | 2016 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 2017 | mov [esp+8], eax |
2018 | pop eax |
||
2643 | clevermous | 2019 | mov [ebp+FAT.cluster_tmp], eax |
2288 | clevermous | 2020 | dec eax |
2021 | dec eax |
||
2643 | clevermous | 2022 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2023 | add eax, [ebp+FAT.DATA_START] |
||
2288 | clevermous | 2024 | @@: |
2643 | clevermous | 2025 | lea ebx, [ebp+FAT.buffer] |
2288 | clevermous | 2026 | mov edi, ebx |
2643 | clevermous | 2027 | push eax |
2028 | call fs_read32_sys |
||
2029 | test eax, eax |
||
2030 | pop eax |
||
2288 | clevermous | 2031 | jnz .notfound2 |
2032 | add ebx, 512 |
||
2033 | push eax |
||
2034 | .do_bdfe: |
||
2035 | inc dword [edx+8] ; new file found |
||
2036 | dec dword [esp+4] |
||
2037 | jns .l2 |
||
2038 | dec ecx |
||
2039 | js .l2 |
||
2040 | inc dword [edx+4] ; new file block copied |
||
2643 | clevermous | 2041 | push ebp |
2042 | lea ebp, [esp+20] |
||
2288 | clevermous | 2043 | call fat_entry_to_bdfe |
2643 | clevermous | 2044 | pop ebp |
2288 | clevermous | 2045 | .l2: |
2046 | add edi, 0x20 |
||
2047 | cmp edi, ebx |
||
2048 | jb .l1 |
||
2049 | pop eax |
||
2050 | inc eax |
||
2051 | dec dword [esp+4] |
||
2052 | jnz .new_sector |
||
2643 | clevermous | 2053 | mov eax, [ebp+FAT.cluster_tmp] |
2288 | clevermous | 2054 | test eax, eax |
2055 | jz .done |
||
2056 | call get_FAT |
||
2643 | clevermous | 2057 | jc .notfound2 |
2288 | clevermous | 2058 | cmp eax, 2 |
2059 | jb .done |
||
2643 | clevermous | 2060 | cmp eax, [ebp+FAT.fatRESERVED] |
2288 | clevermous | 2061 | jae .done |
2062 | push eax |
||
2643 | clevermous | 2063 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 2064 | mov [esp+8], eax |
2065 | pop eax |
||
2066 | pop ebx |
||
2067 | add esp, 4 |
||
2068 | jmp .new_cluster |
||
2069 | .notfound2: |
||
2070 | add esp, 8 |
||
2071 | .notfound: |
||
2072 | add esp, 262*2+4 |
||
2643 | clevermous | 2073 | pop esi edi |
2074 | mov ebx, [edx+4] |
||
2075 | call fat_unlock |
||
2076 | mov eax, ERROR_DEVICE |
||
2288 | clevermous | 2077 | ret |
2078 | .done: |
||
2079 | add esp, 262*2+4+8 |
||
2080 | mov ebx, [edx+4] |
||
2081 | xor eax, eax |
||
2082 | dec ecx |
||
2083 | js @f |
||
2084 | mov al, ERROR_END_OF_FILE |
||
2085 | @@: |
||
2643 | clevermous | 2086 | push eax |
2087 | call fat_unlock |
||
2088 | pop eax |
||
2089 | pop esi edi |
||
2288 | clevermous | 2090 | ret |
2091 | |||
4273 | clevermous | 2092 | fat1x_root_next: |
2643 | clevermous | 2093 | push ecx |
2094 | lea ecx, [ebp+FAT.buffer+0x200-0x20] |
||
2095 | cmp edi, ecx |
||
4273 | clevermous | 2096 | jae fat1x_root_next_sector |
2643 | clevermous | 2097 | pop ecx |
2288 | clevermous | 2098 | add edi, 0x20 |
2099 | ret ; CF=0 |
||
4273 | clevermous | 2100 | fat1x_root_next_sector: |
2288 | clevermous | 2101 | ; read next sector |
2643 | clevermous | 2102 | push [ebp+FAT.longname_sec2] |
2103 | pop [ebp+FAT.longname_sec1] |
||
2288 | clevermous | 2104 | mov ecx, [eax+4] |
2105 | push ecx |
||
2643 | clevermous | 2106 | add ecx, [ebp+FAT.ROOT_START] |
2107 | mov [ebp+FAT.longname_sec2], ecx |
||
2288 | clevermous | 2108 | pop ecx |
2109 | inc ecx |
||
2110 | mov [eax+4], ecx |
||
2643 | clevermous | 2111 | cmp ecx, [ebp+FAT.ROOT_SECTORS] |
2288 | clevermous | 2112 | pop ecx |
4273 | clevermous | 2113 | jb fat1x_root_first |
2643 | clevermous | 2114 | mov eax, ERROR_FILE_NOT_FOUND |
2115 | stc |
||
2116 | ret |
||
4273 | clevermous | 2117 | fat1x_root_first: |
2288 | clevermous | 2118 | mov eax, [eax+4] |
2643 | clevermous | 2119 | add eax, [ebp+FAT.ROOT_START] |
2288 | clevermous | 2120 | push ebx |
2643 | clevermous | 2121 | lea edi, [ebp+FAT.buffer] |
2288 | clevermous | 2122 | mov ebx, edi |
2643 | clevermous | 2123 | call fs_read32_sys |
2288 | clevermous | 2124 | pop ebx |
2643 | clevermous | 2125 | test eax, eax |
2288 | clevermous | 2126 | jnz .readerr |
2127 | ret ; CF=0 |
||
2128 | .readerr: |
||
2643 | clevermous | 2129 | mov eax, ERROR_DEVICE |
2288 | clevermous | 2130 | stc |
2131 | ret |
||
2643 | clevermous | 2132 | .notfound: |
2133 | mov eax, ERROR_FILE_NOT_FOUND |
||
2134 | stc |
||
2135 | ret |
||
4273 | clevermous | 2136 | fat1x_root_begin_write: |
2288 | clevermous | 2137 | push edi eax |
4273 | clevermous | 2138 | call fat1x_root_first |
2288 | clevermous | 2139 | pop eax edi |
2140 | ret |
||
4273 | clevermous | 2141 | fat1x_root_end_write: |
2288 | clevermous | 2142 | pusha |
2143 | mov eax, [eax+4] |
||
2643 | clevermous | 2144 | add eax, [ebp+FAT.ROOT_START] |
2145 | lea ebx, [ebp+FAT.buffer] |
||
2146 | call fs_write32_sys |
||
2288 | clevermous | 2147 | popa |
2148 | ret |
||
4273 | clevermous | 2149 | fat1x_root_next_write: |
2643 | clevermous | 2150 | push ecx |
2151 | lea ecx, [ebp+FAT.buffer+0x200] |
||
2152 | cmp edi, ecx |
||
2288 | clevermous | 2153 | jae @f |
2643 | clevermous | 2154 | pop ecx |
2288 | clevermous | 2155 | ret |
2156 | @@: |
||
4273 | clevermous | 2157 | call fat1x_root_end_write |
2158 | jmp fat1x_root_next_sector |
||
2159 | fat1x_root_extend_dir: |
||
2288 | clevermous | 2160 | stc |
2161 | ret |
||
2162 | |||
2163 | fat_notroot_next: |
||
2643 | clevermous | 2164 | push ecx |
2165 | lea ecx, [ebp+FAT.buffer+0x200-0x20] |
||
2166 | cmp edi, ecx |
||
2288 | clevermous | 2167 | jae fat_notroot_next_sector |
2643 | clevermous | 2168 | pop ecx |
2288 | clevermous | 2169 | add edi, 0x20 |
2170 | ret ; CF=0 |
||
2171 | fat_notroot_next_sector: |
||
2643 | clevermous | 2172 | push [ebp+FAT.longname_sec2] |
2173 | pop [ebp+FAT.longname_sec1] |
||
2288 | clevermous | 2174 | push eax |
2175 | call fat_get_sector |
||
2643 | clevermous | 2176 | mov [ebp+FAT.longname_sec2], eax |
2288 | clevermous | 2177 | pop eax |
2178 | mov ecx, [eax+4] |
||
2179 | inc ecx |
||
2643 | clevermous | 2180 | cmp ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 2181 | jae fat_notroot_next_cluster |
2182 | mov [eax+4], ecx |
||
2183 | jmp @f |
||
2184 | fat_notroot_next_cluster: |
||
2185 | push eax |
||
2186 | mov eax, [eax] |
||
2187 | call get_FAT |
||
2188 | mov ecx, eax |
||
2189 | pop eax |
||
2643 | clevermous | 2190 | jc fat_notroot_first.deverr |
2191 | cmp ecx, 2 |
||
2192 | jb fat_notroot_next_err |
||
2193 | cmp ecx, [ebp+FAT.fatRESERVED] |
||
2288 | clevermous | 2194 | jae fat_notroot_next_err |
2195 | mov [eax], ecx |
||
2196 | and dword [eax+4], 0 |
||
2197 | @@: |
||
2198 | pop ecx |
||
2199 | fat_notroot_first: |
||
2200 | call fat_get_sector |
||
2201 | push ebx |
||
2643 | clevermous | 2202 | lea edi, [ebp+FAT.buffer] |
2288 | clevermous | 2203 | mov ebx, edi |
2643 | clevermous | 2204 | call fs_read32_sys |
2288 | clevermous | 2205 | pop ebx |
2643 | clevermous | 2206 | test eax, eax |
2207 | jz .ret ; CF=0 |
||
2208 | push ecx |
||
2209 | .deverr: |
||
2210 | pop ecx |
||
2211 | mov eax, ERROR_DEVICE |
||
2212 | stc |
||
2213 | .ret: |
||
2214 | ret |
||
2288 | clevermous | 2215 | fat_notroot_next_err: |
2216 | pop ecx |
||
2643 | clevermous | 2217 | mov eax, ERROR_FILE_NOT_FOUND |
2288 | clevermous | 2218 | stc |
2219 | ret |
||
2220 | fat_notroot_begin_write: |
||
2221 | push eax edi |
||
2222 | call fat_notroot_first |
||
2223 | pop edi eax |
||
2224 | ret |
||
2225 | fat_notroot_end_write: |
||
2226 | call fat_get_sector |
||
2227 | push ebx |
||
2643 | clevermous | 2228 | lea ebx, [ebp+FAT.buffer] |
2229 | call fs_write32_sys |
||
2288 | clevermous | 2230 | pop ebx |
2231 | ret |
||
2232 | fat_notroot_next_write: |
||
2643 | clevermous | 2233 | push ecx |
2234 | lea ecx, [ebp+FAT.buffer+0x200] |
||
2235 | cmp edi, ecx |
||
2288 | clevermous | 2236 | jae @f |
2643 | clevermous | 2237 | pop ecx |
2288 | clevermous | 2238 | ret |
2239 | @@: |
||
2240 | push eax |
||
2241 | call fat_notroot_end_write |
||
2242 | pop eax |
||
2243 | jmp fat_notroot_next_sector |
||
2244 | fat_notroot_extend_dir: |
||
2245 | push eax |
||
2246 | call get_free_FAT |
||
2247 | jnc .found |
||
2248 | pop eax |
||
2249 | ret ; CF=1 |
||
2250 | .found: |
||
2251 | push edx |
||
2643 | clevermous | 2252 | mov edx, [ebp+FAT.fatEND] |
2288 | clevermous | 2253 | call set_FAT |
2643 | clevermous | 2254 | jc .writeerr |
2288 | clevermous | 2255 | mov edx, eax |
2256 | mov eax, [esp+4] |
||
2257 | mov eax, [eax] |
||
2258 | push edx |
||
2259 | call set_FAT |
||
2260 | pop edx |
||
2643 | clevermous | 2261 | jnc @f |
2262 | .writeerr: |
||
2288 | clevermous | 2263 | pop edx |
2264 | pop eax |
||
2265 | stc |
||
2266 | ret |
||
2267 | @@: |
||
2268 | push ecx |
||
2269 | or ecx, -1 |
||
2270 | call add_disk_free_space |
||
2271 | ; zero new cluster |
||
2272 | mov ecx, 512/4 |
||
2643 | clevermous | 2273 | lea edi, [ebp+FAT.buffer] |
2288 | clevermous | 2274 | push edi |
2275 | xor eax, eax |
||
2276 | rep stosd |
||
2277 | pop edi |
||
2278 | pop ecx |
||
2279 | mov eax, [esp+4] |
||
2280 | mov [eax], edx |
||
2281 | and dword [eax+4], 0 |
||
2282 | pop edx |
||
2283 | mov eax, [eax] |
||
2284 | dec eax |
||
2285 | dec eax |
||
2286 | push ebx ecx |
||
2643 | clevermous | 2287 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 2288 | imul eax, ecx |
2643 | clevermous | 2289 | add eax, [ebp+FAT.DATA_START] |
2288 | clevermous | 2290 | mov ebx, edi |
2291 | @@: |
||
2643 | clevermous | 2292 | push eax |
2293 | call fs_write32_sys |
||
2294 | pop eax |
||
2288 | clevermous | 2295 | inc eax |
2296 | loop @b |
||
2297 | pop ecx ebx eax |
||
2298 | clc |
||
2299 | ret |
||
2300 | |||
2301 | fat_get_sector: |
||
2302 | push ecx |
||
2303 | mov ecx, [eax] |
||
2304 | dec ecx |
||
2305 | dec ecx |
||
2643 | clevermous | 2306 | imul ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2307 | add ecx, [ebp+FAT.DATA_START] |
||
2288 | clevermous | 2308 | add ecx, [eax+4] |
2309 | mov eax, ecx |
||
2310 | pop ecx |
||
2311 | ret |
||
2312 | |||
2643 | clevermous | 2313 | fshrad: |
2314 | call fat_unlock |
||
2315 | mov eax, ERROR_ACCESS_DENIED |
||
2316 | xor ebx, ebx |
||
2317 | ret |
||
2318 | |||
2319 | ;---------------------------------------------------------------- |
||
4273 | clevermous | 2320 | ; fat_CreateFolder - FAT implementation of creating a folder |
2643 | clevermous | 2321 | ; in: ebp = pointer to FAT structure |
2322 | ; in: esi+[esp+4] = name |
||
2323 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
2324 | ; out: eax, ebx = return values for sysfunc 70 |
||
2325 | ;---------------------------------------------------------------- |
||
2326 | fat_CreateFolder: |
||
2327 | push 1 |
||
2328 | jmp fat_Rewrite.common |
||
2329 | |||
2330 | ;---------------------------------------------------------------- |
||
4273 | clevermous | 2331 | ; fat_Rewrite - FAT implementation of creating a new file |
2643 | clevermous | 2332 | ; in: ebp = pointer to FAT structure |
2333 | ; in: esi+[esp+4] = name |
||
2334 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
2335 | ; out: eax, ebx = return values for sysfunc 70 |
||
2336 | ;---------------------------------------------------------------- |
||
2337 | fat_Rewrite: |
||
2338 | push 0 |
||
2339 | .common: |
||
2340 | call fat_lock |
||
2341 | pop eax |
||
2288 | clevermous | 2342 | cmp byte [esi], 0 |
2343 | jz fshrad |
||
2643 | clevermous | 2344 | mov ecx, [ebx+12] |
2345 | mov edx, [ebx+16] |
||
2288 | clevermous | 2346 | pushad |
2347 | xor edi, edi |
||
2643 | clevermous | 2348 | mov edx, [esp+4+20h] |
2288 | clevermous | 2349 | push esi |
2643 | clevermous | 2350 | test edx, edx |
2288 | clevermous | 2351 | jz @f |
2643 | clevermous | 2352 | mov esi, edx |
2288 | clevermous | 2353 | @@: |
2354 | lodsb |
||
2355 | test al, al |
||
2356 | jz @f |
||
2357 | cmp al, '/' |
||
2358 | jnz @b |
||
2359 | lea edi, [esi-1] |
||
2360 | jmp @b |
||
2361 | @@: |
||
2362 | pop esi |
||
2363 | test edi, edi |
||
2364 | jnz .noroot |
||
2643 | clevermous | 2365 | test edx, edx |
2288 | clevermous | 2366 | jnz .hasebp |
2643 | clevermous | 2367 | mov edx, [ebp+FAT.ROOT_CLUSTER] |
2368 | cmp [ebp+FAT.fs_type], 32 |
||
2288 | clevermous | 2369 | jz .pushnotroot |
2643 | clevermous | 2370 | xor edx, edx |
2371 | push edx |
||
4273 | clevermous | 2372 | push fat1x_root_extend_dir |
2373 | push fat1x_root_end_write |
||
2374 | push fat1x_root_next_write |
||
2375 | push fat1x_root_begin_write |
||
2643 | clevermous | 2376 | push edx |
2377 | push edx |
||
4273 | clevermous | 2378 | push fat1x_root_first |
2379 | push fat1x_root_next |
||
2288 | clevermous | 2380 | jmp .common1 |
2381 | .hasebp: |
||
2382 | mov eax, ERROR_ACCESS_DENIED |
||
2643 | clevermous | 2383 | cmp byte [edx], 0 |
2288 | clevermous | 2384 | jz .ret1 |
2643 | clevermous | 2385 | stdcall hd_find_lfn, 0 |
2386 | mov esi, [esp+4+20h] |
||
2387 | jc .ret1 |
||
2288 | clevermous | 2388 | jmp .common0 |
2389 | .noroot: |
||
2390 | mov eax, ERROR_ACCESS_DENIED |
||
2391 | cmp byte [edi+1], 0 |
||
2392 | jz .ret1 |
||
2393 | ; check existence |
||
2394 | mov byte [edi], 0 |
||
2395 | push edi |
||
2643 | clevermous | 2396 | stdcall hd_find_lfn, [esp+4+24h] |
2288 | clevermous | 2397 | pop esi |
2398 | mov byte [esi], '/' |
||
2399 | jnc @f |
||
2400 | .notfound0: |
||
2401 | mov eax, ERROR_FILE_NOT_FOUND |
||
2402 | .ret1: |
||
2403 | mov [esp+28], eax |
||
2643 | clevermous | 2404 | call fat_unlock |
2288 | clevermous | 2405 | popad |
2406 | xor ebx, ebx |
||
2407 | ret |
||
2408 | @@: |
||
2409 | inc esi |
||
2410 | .common0: |
||
2411 | test byte [edi+11], 0x10 ; must be directory |
||
2412 | mov eax, ERROR_ACCESS_DENIED |
||
2413 | jz .ret1 |
||
2643 | clevermous | 2414 | mov edx, [edi+20-2] |
2415 | mov dx, [edi+26] ; ebp=cluster |
||
2288 | clevermous | 2416 | mov eax, ERROR_FAT_TABLE |
2643 | clevermous | 2417 | cmp edx, 2 |
2288 | clevermous | 2418 | jb .ret1 |
2419 | .pushnotroot: |
||
2643 | clevermous | 2420 | push edx |
2288 | clevermous | 2421 | push fat_notroot_extend_dir |
2422 | push fat_notroot_end_write |
||
2423 | push fat_notroot_next_write |
||
2424 | push fat_notroot_begin_write |
||
2425 | push 0 |
||
2643 | clevermous | 2426 | push edx |
2288 | clevermous | 2427 | push fat_notroot_first |
2428 | push fat_notroot_next |
||
2429 | .common1: |
||
2430 | call fat_find_lfn |
||
2431 | jc .notfound |
||
2432 | ; found |
||
2433 | test byte [edi+11], 10h |
||
2434 | jz .exists_file |
||
2435 | ; found directory; if we are creating directory, return OK, |
||
2436 | ; if we are creating file, say "access denied" |
||
2643 | clevermous | 2437 | add esp, 36 |
2438 | call fat_unlock |
||
2288 | clevermous | 2439 | popad |
2440 | test al, al |
||
2441 | mov eax, ERROR_ACCESS_DENIED |
||
2442 | jz @f |
||
2443 | mov al, 0 |
||
2444 | @@: |
||
2445 | xor ebx, ebx |
||
2446 | ret |
||
2447 | .exists_file: |
||
2448 | ; found file; if we are creating directory, return "access denied", |
||
2449 | ; if we are creating file, delete existing file and continue |
||
2643 | clevermous | 2450 | cmp byte [esp+36+28], 0 |
2288 | clevermous | 2451 | jz @f |
2643 | clevermous | 2452 | add esp, 36 |
2453 | call fat_unlock |
||
2288 | clevermous | 2454 | popad |
2455 | mov eax, ERROR_ACCESS_DENIED |
||
2456 | xor ebx, ebx |
||
2457 | ret |
||
2458 | @@: |
||
2459 | ; delete FAT chain |
||
2460 | push edi |
||
2461 | xor eax, eax |
||
2462 | mov dword [edi+28], eax ; zero size |
||
2463 | xor ecx, ecx |
||
2464 | mov eax, [edi+20-2] |
||
2465 | mov ax, [edi+26] |
||
2466 | mov word [edi+20], cx |
||
2467 | mov word [edi+26], cx |
||
2468 | test eax, eax |
||
2469 | jz .done1 |
||
2470 | @@: |
||
2643 | clevermous | 2471 | cmp eax, [ebp+FAT.fatRESERVED] |
2288 | clevermous | 2472 | jae .done1 |
2473 | push edx |
||
2474 | xor edx, edx |
||
2475 | call set_FAT |
||
2476 | mov eax, edx |
||
2477 | pop edx |
||
2643 | clevermous | 2478 | jc .done1 |
2288 | clevermous | 2479 | inc ecx |
2480 | jmp @b |
||
2481 | .done1: |
||
2482 | pop edi |
||
2483 | call get_time_for_file |
||
2484 | mov [edi+22], ax |
||
2485 | call get_date_for_file |
||
2486 | mov [edi+24], ax |
||
2487 | mov [edi+18], ax |
||
2488 | or byte [edi+11], 20h ; set 'archive' attribute |
||
2489 | jmp .doit |
||
2490 | .notfound: |
||
2491 | ; file is not found; generate short name |
||
2492 | call fat_name_is_legal |
||
2493 | jc @f |
||
2643 | clevermous | 2494 | add esp, 36 |
2495 | call fat_unlock |
||
2288 | clevermous | 2496 | popad |
2497 | mov eax, ERROR_FILE_NOT_FOUND |
||
2498 | xor ebx, ebx |
||
2499 | ret |
||
2500 | @@: |
||
2501 | sub esp, 12 |
||
2502 | mov edi, esp |
||
2503 | call fat_gen_short_name |
||
2504 | .test_short_name_loop: |
||
2505 | push esi edi ecx |
||
2506 | mov esi, edi |
||
2507 | lea eax, [esp+12+12+8] |
||
2643 | clevermous | 2508 | mov edx, [eax+24] |
2509 | mov [eax], edx |
||
2288 | clevermous | 2510 | and dword [eax+4], 0 |
2511 | call dword [eax-4] |
||
2512 | jc .found |
||
2513 | .test_short_name_entry: |
||
2514 | cmp byte [edi+11], 0xF |
||
2515 | jz .test_short_name_cont |
||
2516 | mov ecx, 11 |
||
2517 | push esi edi |
||
2518 | repz cmpsb |
||
2519 | pop edi esi |
||
2520 | jz .short_name_found |
||
2521 | .test_short_name_cont: |
||
2522 | lea eax, [esp+12+12+8] |
||
2523 | call dword [eax-8] |
||
2524 | jnc .test_short_name_entry |
||
2525 | jmp .found |
||
2526 | .short_name_found: |
||
2527 | pop ecx edi esi |
||
2528 | call fat_next_short_name |
||
2529 | jnc .test_short_name_loop |
||
2530 | .disk_full: |
||
2643 | clevermous | 2531 | add esp, 12+36 |
2532 | call fat_unlock |
||
2288 | clevermous | 2533 | popa |
2534 | mov eax, ERROR_DISK_FULL |
||
2535 | xor ebx, ebx |
||
2536 | ret |
||
2537 | .found: |
||
2538 | pop ecx edi esi |
||
2539 | ; now find space in directory |
||
2540 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
||
2541 | mov al, '~' |
||
2542 | push ecx edi |
||
2543 | mov ecx, 8 |
||
2544 | repnz scasb |
||
3598 | clevermous | 2545 | movi eax, 1 ; 1 entry |
2288 | clevermous | 2546 | jnz .notilde |
2547 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
||
2548 | xor eax, eax |
||
2549 | @@: |
||
2550 | cmp byte [esi], 0 |
||
2551 | jz @f |
||
2552 | inc esi |
||
2553 | inc eax |
||
2554 | jmp @b |
||
2555 | @@: |
||
2556 | sub esi, eax |
||
2557 | add eax, 12+13 |
||
2558 | mov ecx, 13 |
||
2559 | push edx |
||
2560 | cdq |
||
2561 | div ecx |
||
2562 | pop edx |
||
2563 | .notilde: |
||
2564 | push -1 |
||
2565 | push -1 |
||
2566 | push -1 |
||
2567 | ; find |
||
2568 | xor ecx, ecx |
||
2569 | push eax |
||
2570 | lea eax, [esp+16+8+12+8] |
||
2643 | clevermous | 2571 | mov edx, [eax+24] |
2572 | mov [eax], edx |
||
2288 | clevermous | 2573 | and dword [eax+4], 0 |
2574 | call dword [eax-4] |
||
2575 | pop eax |
||
2576 | jnc .scan_dir |
||
2577 | .fsfrfe3: |
||
2643 | clevermous | 2578 | add esp, 12+8+12+36 |
2579 | call fat_unlock |
||
2288 | clevermous | 2580 | popad |
2643 | clevermous | 2581 | mov eax, ERROR_DEVICE |
2288 | clevermous | 2582 | xor ebx, ebx |
2583 | ret |
||
2584 | .scan_dir: |
||
2585 | cmp byte [edi], 0 |
||
2586 | jz .free |
||
2587 | cmp byte [edi], 0xE5 |
||
2588 | jz .free |
||
2589 | xor ecx, ecx |
||
2590 | .scan_cont: |
||
2591 | push eax |
||
2592 | lea eax, [esp+16+8+12+8] |
||
2593 | call dword [eax-8] |
||
2643 | clevermous | 2594 | mov edx, eax |
2288 | clevermous | 2595 | pop eax |
2596 | jnc .scan_dir |
||
2643 | clevermous | 2597 | cmp edx, ERROR_DEVICE |
2598 | jz .fsfrfe3 |
||
2288 | clevermous | 2599 | push eax |
2600 | lea eax, [esp+16+8+12+8] |
||
2601 | call dword [eax+20] ; extend directory |
||
2602 | pop eax |
||
2603 | jnc .scan_dir |
||
2643 | clevermous | 2604 | add esp, 12+8+12+36 |
2605 | call fat_unlock |
||
2288 | clevermous | 2606 | popad |
2607 | mov eax, ERROR_DISK_FULL |
||
2608 | xor ebx, ebx |
||
2609 | ret |
||
2610 | .free: |
||
2611 | test ecx, ecx |
||
2612 | jnz @f |
||
2613 | mov [esp], edi |
||
2614 | mov ecx, [esp+12+8+12+8] |
||
2615 | mov [esp+4], ecx |
||
2616 | mov ecx, [esp+12+8+12+12] |
||
2617 | mov [esp+8], ecx |
||
2618 | xor ecx, ecx |
||
2619 | @@: |
||
2620 | inc ecx |
||
2621 | cmp ecx, eax |
||
2622 | jb .scan_cont |
||
2623 | ; found! |
||
2643 | clevermous | 2624 | push esi ecx |
2625 | ; If creating a directory, allocate one data cluster now and fail immediately |
||
2626 | ; if this is impossible. This prevents from creating an invalid directory entry |
||
2627 | ; on a full disk. |
||
2628 | ; yup, the argument is quite non-intuitive... but what should I do if |
||
2629 | ; the entire function uses such arguments? BTW, it refers to al from pushad, |
||
2630 | ; which in turn is filled with 0 in fat_Rewrite and 1 in fat_CreateFolder. |
||
2631 | cmp byte [esp+8+12+8+12+36+28], 0 |
||
2632 | jz .no.preallocate.folder.data |
||
2633 | call get_free_FAT |
||
2634 | jnc @f |
||
2635 | add esp, 8+12+8 |
||
2636 | jmp .disk_full |
||
2637 | @@: |
||
2638 | mov [esp+8+12+8+12+36+20], eax ; store the cluster somewhere |
||
2639 | .no.preallocate.folder.data: |
||
2288 | clevermous | 2640 | ; calculate name checksum |
2641 | mov esi, [esp+8+12] |
||
2642 | mov ecx, 11 |
||
2643 | xor eax, eax |
||
2644 | @@: |
||
2645 | ror al, 1 |
||
2646 | add al, [esi] |
||
2647 | inc esi |
||
2648 | loop @b |
||
2649 | pop ecx esi |
||
2650 | pop edi |
||
2651 | pop dword [esp+8+12+12] |
||
2652 | pop dword [esp+8+12+12] |
||
2653 | ; edi points to first entry in free chunk |
||
2654 | dec ecx |
||
2655 | jz .nolfn |
||
2656 | push esi |
||
2657 | push eax |
||
2658 | lea eax, [esp+8+8+12+8] |
||
2659 | call dword [eax+8] ; begin write |
||
2660 | mov al, 40h |
||
2661 | .writelfn: |
||
2662 | or al, cl |
||
2663 | mov esi, [esp+4] |
||
2664 | push ecx |
||
2665 | dec ecx |
||
2666 | imul ecx, 13 |
||
2667 | add esi, ecx |
||
2668 | stosb |
||
2669 | mov cl, 5 |
||
4273 | clevermous | 2670 | call fat_read_symbols |
2288 | clevermous | 2671 | mov ax, 0xF |
2672 | stosw |
||
2673 | mov al, [esp+4] |
||
2674 | stosb |
||
2675 | mov cl, 6 |
||
4273 | clevermous | 2676 | call fat_read_symbols |
2288 | clevermous | 2677 | xor eax, eax |
2678 | stosw |
||
2679 | mov cl, 2 |
||
4273 | clevermous | 2680 | call fat_read_symbols |
2288 | clevermous | 2681 | pop ecx |
2682 | lea eax, [esp+8+8+12+8] |
||
2683 | call dword [eax+12] ; next write |
||
2684 | xor eax, eax |
||
2685 | loop .writelfn |
||
2686 | pop eax |
||
2687 | pop esi |
||
2688 | ; lea eax, [esp+8+12+8] |
||
2689 | ; call dword [eax+16] ; end write |
||
2690 | .nolfn: |
||
2691 | xchg esi, [esp] |
||
2692 | mov ecx, 11 |
||
2693 | rep movsb |
||
2694 | mov word [edi], 20h ; attributes |
||
2695 | sub edi, 11 |
||
2696 | pop esi ecx |
||
2697 | add esp, 12 |
||
2698 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
||
2699 | call get_time_for_file |
||
2700 | mov [edi+14], ax ; creation time |
||
2701 | mov [edi+22], ax ; last write time |
||
2702 | call get_date_for_file |
||
2703 | mov [edi+16], ax ; creation date |
||
2704 | mov [edi+24], ax ; last write date |
||
2705 | mov [edi+18], ax ; last access date |
||
2706 | xor ecx, ecx |
||
2707 | mov word [edi+20], cx ; high word of cluster |
||
2708 | mov word [edi+26], cx ; low word of cluster - to be filled |
||
2709 | mov dword [edi+28], ecx ; file size - to be filled |
||
2643 | clevermous | 2710 | cmp byte [esp+36+28], cl |
2288 | clevermous | 2711 | jz .doit |
2712 | ; create directory |
||
2713 | mov byte [edi+11], 10h ; attributes: folder |
||
2643 | clevermous | 2714 | mov esi, edi |
2288 | clevermous | 2715 | lea eax, [esp+8] |
2716 | call dword [eax+16] ; flush directory |
||
2643 | clevermous | 2717 | mov eax, [esp+36+20] ; extract saved cluster |
2718 | mov [esp+36+20], edi ; this is needed for calculating arg of add_disk_free_space! |
||
2288 | clevermous | 2719 | push ecx |
2643 | clevermous | 2720 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 2721 | shl ecx, 9 |
2643 | clevermous | 2722 | push ecx |
2723 | push edi |
||
2288 | clevermous | 2724 | jmp .doit2 |
2725 | .doit: |
||
2643 | clevermous | 2726 | mov esi, [esp+36+20] |
2288 | clevermous | 2727 | lea eax, [esp+8] |
2728 | call dword [eax+16] ; flush directory |
||
2729 | push ecx |
||
2643 | clevermous | 2730 | mov ecx, [esp+4+36+24] |
2288 | clevermous | 2731 | push ecx |
2732 | push edi |
||
2733 | test ecx, ecx |
||
2734 | jz .done |
||
2735 | call get_free_FAT |
||
2736 | jc .diskfull |
||
2643 | clevermous | 2737 | .doit2: |
2288 | clevermous | 2738 | push eax |
2739 | mov [edi+26], ax |
||
2740 | shr eax, 16 |
||
2741 | mov [edi+20], ax |
||
2742 | lea eax, [esp+16+8] |
||
2743 | call dword [eax+16] ; flush directory |
||
2744 | pop eax |
||
2745 | push edx |
||
2643 | clevermous | 2746 | mov edx, [ebp+FAT.fatEND] |
2288 | clevermous | 2747 | call set_FAT |
2748 | pop edx |
||
2749 | .write_cluster: |
||
2750 | push eax |
||
2751 | dec eax |
||
2752 | dec eax |
||
2643 | clevermous | 2753 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2754 | add eax, [ebp+FAT.DATA_START] |
||
2755 | push [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2288 | clevermous | 2756 | ; write data |
2757 | .write_sector: |
||
2643 | clevermous | 2758 | cmp byte [esp+20+36+28], 0 |
2288 | clevermous | 2759 | jnz .writedir |
2760 | mov ecx, 512 |
||
2643 | clevermous | 2761 | cmp dword [esp+12], ecx |
2288 | clevermous | 2762 | jb .writeshort |
2763 | ; we can write directly from given buffer |
||
2764 | mov ebx, esi |
||
2765 | add esi, ecx |
||
2766 | jmp .writecommon |
||
2767 | .writeshort: |
||
2643 | clevermous | 2768 | mov ecx, [esp+12] |
2288 | clevermous | 2769 | push ecx |
2643 | clevermous | 2770 | lea edi, [ebp+FAT.buffer] |
2288 | clevermous | 2771 | mov ebx, edi |
2772 | rep movsb |
||
2773 | .writedircont: |
||
2643 | clevermous | 2774 | lea ecx, [ebp+FAT.buffer+0x200] |
2288 | clevermous | 2775 | sub ecx, edi |
2776 | push eax |
||
2777 | xor eax, eax |
||
2778 | rep stosb |
||
2779 | pop eax |
||
2780 | pop ecx |
||
2781 | .writecommon: |
||
2643 | clevermous | 2782 | push eax |
2783 | call fs_write32_app |
||
2784 | test eax, eax |
||
2785 | pop eax |
||
2288 | clevermous | 2786 | jnz .writeerr |
2787 | inc eax |
||
2643 | clevermous | 2788 | sub dword [esp+12], ecx |
2288 | clevermous | 2789 | jz .writedone |
2643 | clevermous | 2790 | dec dword [esp] |
2288 | clevermous | 2791 | jnz .write_sector |
2643 | clevermous | 2792 | pop eax |
2288 | clevermous | 2793 | ; allocate new cluster |
2794 | pop eax |
||
2795 | mov ecx, eax |
||
2796 | call get_free_FAT |
||
2797 | jc .diskfull |
||
2798 | push edx |
||
2643 | clevermous | 2799 | mov edx, [ebp+FAT.fatEND] |
2288 | clevermous | 2800 | call set_FAT |
2801 | xchg eax, ecx |
||
2802 | mov edx, ecx |
||
2803 | call set_FAT |
||
2804 | pop edx |
||
2805 | xchg eax, ecx |
||
2806 | jmp .write_cluster |
||
2807 | .diskfull: |
||
2808 | mov eax, ERROR_DISK_FULL |
||
2809 | jmp .ret |
||
2810 | .writeerr: |
||
2643 | clevermous | 2811 | pop eax eax |
2288 | clevermous | 2812 | sub esi, ecx |
2643 | clevermous | 2813 | mov eax, ERROR_DEVICE |
2288 | clevermous | 2814 | jmp .ret |
2815 | .writedone: |
||
2643 | clevermous | 2816 | pop eax eax |
2288 | clevermous | 2817 | .done: |
2818 | xor eax, eax |
||
2819 | .ret: |
||
2820 | pop edi ecx |
||
2643 | clevermous | 2821 | sub esi, [esp+4+36+20] |
2822 | mov [esp+4+36+28], eax |
||
2823 | mov [esp+4+36+16], esi |
||
2824 | lea eax, [esp+12] |
||
2288 | clevermous | 2825 | call dword [eax+8] |
2643 | clevermous | 2826 | mov [edi+28], esi |
2288 | clevermous | 2827 | call dword [eax+16] |
2643 | clevermous | 2828 | mov [esp+36+16], ebx |
2829 | lea eax, [esi+511] |
||
2288 | clevermous | 2830 | shr eax, 9 |
2643 | clevermous | 2831 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 2832 | lea eax, [eax+ecx-1] |
2833 | xor edx, edx |
||
2834 | div ecx |
||
2643 | clevermous | 2835 | pop ecx |
2288 | clevermous | 2836 | sub ecx, eax |
2837 | call add_disk_free_space |
||
2643 | clevermous | 2838 | add esp, 36 |
2288 | clevermous | 2839 | call update_disk |
2643 | clevermous | 2840 | call fat_unlock |
2288 | clevermous | 2841 | popad |
2842 | ret |
||
2843 | .writedir: |
||
2844 | push 512 |
||
2643 | clevermous | 2845 | lea edi, [ebp+FAT.buffer] |
2288 | clevermous | 2846 | mov ebx, edi |
2643 | clevermous | 2847 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 2848 | shl ecx, 9 |
2643 | clevermous | 2849 | cmp ecx, [esp+16] |
2288 | clevermous | 2850 | jnz .writedircont |
2643 | clevermous | 2851 | dec dword [esp+20] |
2288 | clevermous | 2852 | push esi |
2853 | mov ecx, 32/4 |
||
2854 | rep movsd |
||
2855 | pop esi |
||
2856 | mov dword [edi-32], '. ' |
||
2857 | mov dword [edi-32+4], ' ' |
||
2858 | mov dword [edi-32+8], ' ' |
||
2859 | mov byte [edi-32+11], 10h |
||
2860 | push esi |
||
2861 | mov ecx, 32/4 |
||
2862 | rep movsd |
||
2863 | pop esi |
||
2864 | mov dword [edi-32], '.. ' |
||
2865 | mov dword [edi-32+4], ' ' |
||
2866 | mov dword [edi-32+8], ' ' |
||
2867 | mov byte [edi-32+11], 10h |
||
2643 | clevermous | 2868 | mov ecx, [esp+20+36] |
2869 | cmp ecx, [ebp+FAT.ROOT_CLUSTER] |
||
2288 | clevermous | 2870 | jnz @f |
2871 | xor ecx, ecx |
||
2872 | @@: |
||
2873 | mov word [edi-32+26], cx |
||
2874 | shr ecx, 16 |
||
2875 | mov [edi-32+20], cx |
||
2876 | jmp .writedircont |
||
2877 | |||
4273 | clevermous | 2878 | fat_read_symbol: |
2879 | or ax, -1 |
||
2880 | test esi, esi |
||
2881 | jz .retFFFF |
||
2882 | lodsb |
||
2883 | test al, al |
||
2884 | jnz ansi2uni_char |
||
2885 | xor eax, eax |
||
2886 | xor esi, esi |
||
2887 | .retFFFF: |
||
2888 | ret |
||
2889 | |||
2890 | fat_read_symbols: |
||
2891 | call fat_read_symbol |
||
2892 | stosw |
||
2893 | loop fat_read_symbols |
||
2894 | ret |
||
2895 | |||
2896 | |||
2643 | clevermous | 2897 | fat_Write.access_denied: |
2288 | clevermous | 2898 | push ERROR_ACCESS_DENIED |
3742 | clevermous | 2899 | fat_Write.ret0: |
2288 | clevermous | 2900 | pop eax |
2901 | xor ebx, ebx |
||
2902 | ret |
||
2903 | |||
3742 | clevermous | 2904 | fat_Write.ret11: |
2643 | clevermous | 2905 | push ERROR_DEVICE |
3742 | clevermous | 2906 | jmp fat_Write.ret0 |
2288 | clevermous | 2907 | |
2643 | clevermous | 2908 | ;---------------------------------------------------------------- |
4273 | clevermous | 2909 | ; fat_Write - FAT implementation of writing to file |
2643 | clevermous | 2910 | ; in: ebp = pointer to FAT structure |
2911 | ; in: esi+[esp+4] = name |
||
2912 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
2913 | ; out: eax, ebx = return values for sysfunc 70 |
||
2914 | ;---------------------------------------------------------------- |
||
2915 | fat_Write: |
||
2288 | clevermous | 2916 | cmp byte [esi], 0 |
2917 | jz .access_denied |
||
2643 | clevermous | 2918 | call fat_lock |
2919 | push edi |
||
2920 | stdcall hd_find_lfn, [esp+4+4] |
||
2288 | clevermous | 2921 | jnc .found |
2643 | clevermous | 2922 | pop edi |
2923 | push eax |
||
2924 | call fat_unlock |
||
3742 | clevermous | 2925 | jmp .ret0 |
2288 | clevermous | 2926 | .found: |
2927 | ; FAT does not support files larger than 4GB |
||
2643 | clevermous | 2928 | cmp dword [ebx+8], 0 |
2288 | clevermous | 2929 | jz @f |
2930 | .eof: |
||
2643 | clevermous | 2931 | pop edi |
2288 | clevermous | 2932 | push ERROR_END_OF_FILE |
2643 | clevermous | 2933 | call fat_unlock |
3742 | clevermous | 2934 | jmp .ret0 |
2288 | clevermous | 2935 | @@: |
2643 | clevermous | 2936 | mov ecx, [ebx+12] |
2937 | mov edx, [ebx+16] |
||
2938 | mov ebx, [ebx+4] |
||
2288 | clevermous | 2939 | ; now edi points to direntry, ebx=start byte to write, |
2940 | ; ecx=number of bytes to write, edx=data pointer |
||
2941 | |||
2942 | ; extend file if needed |
||
2943 | add ecx, ebx |
||
2944 | jc .eof ; FAT does not support files larger than 4GB |
||
2643 | clevermous | 2945 | push edx |
2288 | clevermous | 2946 | push eax ; save directory sector |
2947 | push 0 ; return value=0 |
||
2948 | |||
2949 | call get_time_for_file |
||
2950 | mov [edi+22], ax ; last write time |
||
2951 | call get_date_for_file |
||
2952 | mov [edi+24], ax ; last write date |
||
2953 | mov [edi+18], ax ; last access date |
||
2954 | |||
2955 | push dword [edi+28] ; save current file size |
||
2956 | cmp ecx, [edi+28] |
||
2957 | jbe .length_ok |
||
2958 | cmp ecx, ebx |
||
2959 | jz .length_ok |
||
2960 | call hd_extend_file |
||
2961 | jnc .length_ok |
||
2962 | mov [esp+4], eax |
||
2963 | ; hd_extend_file can return three error codes: FAT table error, device error or disk full. |
||
2964 | ; First two cases are fatal errors, in third case we may write some data |
||
2965 | cmp al, ERROR_DISK_FULL |
||
2966 | jz .disk_full |
||
2643 | clevermous | 2967 | call fat_unlock |
2288 | clevermous | 2968 | pop eax |
2969 | pop eax |
||
2643 | clevermous | 2970 | pop ecx |
2971 | pop edx |
||
2972 | pop edi |
||
2288 | clevermous | 2973 | xor ebx, ebx |
2974 | ret |
||
2975 | .disk_full: |
||
2976 | ; correct number of bytes to write |
||
2977 | mov ecx, [edi+28] |
||
2978 | cmp ecx, ebx |
||
2979 | ja .length_ok |
||
2643 | clevermous | 2980 | push 0 |
2288 | clevermous | 2981 | .ret: |
2643 | clevermous | 2982 | pop eax |
2983 | sub edx, [esp+12] |
||
2984 | mov ebx, edx ; ebx=number of written bytes |
||
2288 | clevermous | 2985 | call update_disk |
2643 | clevermous | 2986 | test eax, eax |
2288 | clevermous | 2987 | jz @f |
2643 | clevermous | 2988 | mov byte [esp+4], ERROR_DEVICE |
2288 | clevermous | 2989 | @@: |
2643 | clevermous | 2990 | call fat_unlock |
2288 | clevermous | 2991 | pop eax |
2992 | pop eax |
||
2643 | clevermous | 2993 | pop ecx |
2994 | pop edx |
||
2995 | pop edi |
||
2288 | clevermous | 2996 | ret |
2997 | .length_ok: |
||
2998 | mov esi, [edi+28] |
||
2999 | mov eax, [edi+20-2] |
||
3000 | mov ax, [edi+26] |
||
3001 | mov edi, eax ; edi=current cluster |
||
2643 | clevermous | 3002 | push 0 ; current sector in cluster |
2288 | clevermous | 3003 | ; save directory |
2643 | clevermous | 3004 | mov eax, [esp+12] |
2288 | clevermous | 3005 | push ebx |
2643 | clevermous | 3006 | lea ebx, [ebp+FAT.buffer] |
3007 | call fs_write32_sys |
||
2288 | clevermous | 3008 | pop ebx |
2643 | clevermous | 3009 | test eax, eax |
2288 | clevermous | 3010 | jz @f |
3011 | .device_err: |
||
2643 | clevermous | 3012 | mov byte [esp+8], ERROR_DEVICE |
2288 | clevermous | 3013 | jmp .ret |
2643 | clevermous | 3014 | .fat_err: |
3015 | mov byte [esp+8], ERROR_FAT_TABLE |
||
3016 | jmp .ret |
||
2288 | clevermous | 3017 | @@: |
3018 | |||
3019 | ; now ebx=start pos, ecx=end pos, both lie inside file |
||
3020 | sub ecx, ebx |
||
3021 | jz .ret |
||
3022 | .write_loop: |
||
3023 | ; skip unmodified sectors |
||
2643 | clevermous | 3024 | cmp dword [esp+4], 0x200 |
2288 | clevermous | 3025 | jb .modify |
3026 | sub ebx, 0x200 |
||
3027 | jae .skip |
||
3028 | add ebx, 0x200 |
||
3029 | .modify: |
||
3030 | ; get length of data in current sector |
||
3031 | push ecx |
||
3032 | sub ebx, 0x200 |
||
3033 | jb .hasdata |
||
3034 | neg ebx |
||
3035 | xor ecx, ecx |
||
3036 | jmp @f |
||
3037 | .hasdata: |
||
3038 | neg ebx |
||
3039 | cmp ecx, ebx |
||
3040 | jbe @f |
||
3041 | mov ecx, ebx |
||
3042 | @@: |
||
3043 | ; get current sector number |
||
3044 | mov eax, edi |
||
3045 | dec eax |
||
3046 | dec eax |
||
2643 | clevermous | 3047 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3048 | add eax, [ebp+FAT.DATA_START] |
||
3049 | add eax, [esp+4] |
||
2288 | clevermous | 3050 | ; load sector if needed |
2643 | clevermous | 3051 | cmp dword [esp+8], 0 ; we don't need to read uninitialized data |
2288 | clevermous | 3052 | jz .noread |
3053 | cmp ecx, 0x200 ; we don't need to read sector if it is fully rewritten |
||
3054 | jz .noread |
||
3055 | cmp ecx, esi ; (same for the last sector) |
||
3056 | jz .noread |
||
2643 | clevermous | 3057 | push eax ebx |
3058 | lea ebx, [ebp+FAT.buffer] |
||
3059 | call fs_read32_app |
||
3060 | test eax, eax |
||
3061 | pop ebx eax |
||
2288 | clevermous | 3062 | jz @f |
3063 | .device_err2: |
||
3064 | pop ecx |
||
3065 | jmp .device_err |
||
3066 | @@: |
||
3067 | .noread: |
||
3068 | ; zero uninitialized data if file was extended (because hd_extend_file does not this) |
||
3069 | push eax ecx edi |
||
3070 | xor eax, eax |
||
3071 | mov ecx, 0x200 |
||
2643 | clevermous | 3072 | sub ecx, [esp+8+12] |
2288 | clevermous | 3073 | jbe @f |
2643 | clevermous | 3074 | lea edi, [ebp+FAT.buffer] |
3075 | add edi, [esp+8+12] |
||
2288 | clevermous | 3076 | rep stosb |
3077 | @@: |
||
3078 | ; zero uninitialized data in the last sector |
||
3079 | mov ecx, 0x200 |
||
3080 | sub ecx, esi |
||
3081 | jbe @f |
||
2643 | clevermous | 3082 | lea edi, [ebp+FAT.buffer+esi] |
2288 | clevermous | 3083 | rep stosb |
3084 | @@: |
||
3085 | pop edi ecx |
||
3086 | ; copy new data |
||
3087 | mov eax, edx |
||
3088 | neg ebx |
||
3089 | jecxz @f |
||
2643 | clevermous | 3090 | lea ebx, [ebp+FAT.buffer+0x200+ebx] |
2288 | clevermous | 3091 | call memmove |
3092 | xor ebx, ebx |
||
3093 | @@: |
||
3094 | pop eax |
||
3095 | ; save sector |
||
3096 | push ebx |
||
2643 | clevermous | 3097 | lea ebx, [ebp+FAT.buffer] |
3098 | call fs_write32_app |
||
2288 | clevermous | 3099 | pop ebx |
2643 | clevermous | 3100 | test eax, eax |
2288 | clevermous | 3101 | jnz .device_err2 |
3102 | add edx, ecx |
||
3103 | sub [esp], ecx |
||
3104 | pop ecx |
||
3105 | jz .ret |
||
3106 | .skip: |
||
3107 | ; next sector |
||
2643 | clevermous | 3108 | pop eax |
3109 | inc eax |
||
3110 | push eax |
||
3111 | cmp eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2288 | clevermous | 3112 | jb @f |
2643 | clevermous | 3113 | and dword [esp], 0 |
2288 | clevermous | 3114 | mov eax, edi |
3115 | call get_FAT |
||
3116 | mov edi, eax |
||
2643 | clevermous | 3117 | jc .device_err |
3118 | cmp edi, 2 |
||
3119 | jb .fat_err |
||
3120 | cmp edi, [ebp+FAT.fatRESERVED] |
||
3121 | jae .fat_err |
||
2288 | clevermous | 3122 | @@: |
3123 | sub esi, 0x200 |
||
3124 | jae @f |
||
3125 | xor esi, esi |
||
3126 | @@: |
||
2643 | clevermous | 3127 | sub dword [esp+4], 0x200 |
2288 | clevermous | 3128 | jae @f |
2643 | clevermous | 3129 | and dword [esp+4], 0 |
2288 | clevermous | 3130 | @@: |
3131 | jmp .write_loop |
||
3132 | |||
3133 | hd_extend_file.zero_size: |
||
3134 | xor eax, eax |
||
3135 | jmp hd_extend_file.start_extend |
||
3136 | |||
3137 | ; extends file on hd to given size (new data area is undefined) |
||
3138 | ; in: edi->direntry, ecx=new size |
||
3139 | ; out: CF=0 => OK, eax=0 |
||
2643 | clevermous | 3140 | ; CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL or ERROR_DEVICE) |
2288 | clevermous | 3141 | hd_extend_file: |
2643 | clevermous | 3142 | push esi |
3143 | mov esi, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
3144 | imul esi, [ebp+FAT.BYTES_PER_SECTOR] |
||
2288 | clevermous | 3145 | push ecx |
3146 | ; find the last cluster of file |
||
3147 | mov eax, [edi+20-2] |
||
3148 | mov ax, [edi+26] |
||
3149 | mov ecx, [edi+28] |
||
3150 | jecxz .zero_size |
||
3151 | .last_loop: |
||
2643 | clevermous | 3152 | sub ecx, esi |
2288 | clevermous | 3153 | jbe .last_found |
3154 | call get_FAT |
||
2643 | clevermous | 3155 | jnc @f |
2288 | clevermous | 3156 | .device_err: |
3157 | pop ecx |
||
3158 | .device_err2: |
||
2643 | clevermous | 3159 | pop esi |
3160 | push ERROR_DEVICE |
||
2288 | clevermous | 3161 | .ret_err: |
3162 | pop eax |
||
3163 | stc |
||
3164 | ret |
||
3165 | @@: |
||
3166 | cmp eax, 2 |
||
3167 | jb .fat_err |
||
2643 | clevermous | 3168 | cmp eax, [ebp+FAT.fatRESERVED] |
2288 | clevermous | 3169 | jb .last_loop |
3170 | .fat_err: |
||
2643 | clevermous | 3171 | pop ecx esi |
2288 | clevermous | 3172 | push ERROR_FAT_TABLE |
3173 | jmp .ret_err |
||
3174 | .last_found: |
||
3175 | push eax |
||
3176 | call get_FAT |
||
2643 | clevermous | 3177 | jnc @f |
2288 | clevermous | 3178 | pop eax |
3179 | jmp .device_err |
||
3180 | @@: |
||
2643 | clevermous | 3181 | cmp eax, [ebp+FAT.fatRESERVED] |
2288 | clevermous | 3182 | pop eax |
3183 | jb .fat_err |
||
3184 | ; set length to full number of clusters |
||
3185 | sub [edi+28], ecx |
||
3186 | .start_extend: |
||
3187 | pop ecx |
||
3188 | ; now do extend |
||
3189 | push edx |
||
3190 | mov edx, 2 ; start scan from cluster 2 |
||
3191 | .extend_loop: |
||
3192 | cmp [edi+28], ecx |
||
3193 | jae .extend_done |
||
3194 | ; add new cluster |
||
3195 | push eax |
||
3196 | call get_free_FAT |
||
3197 | jc .disk_full |
||
2643 | clevermous | 3198 | mov edx, [ebp+FAT.fatEND] |
2288 | clevermous | 3199 | call set_FAT |
3200 | mov edx, eax |
||
3201 | pop eax |
||
3202 | test eax, eax |
||
3203 | jz .first_cluster |
||
3204 | push edx |
||
3205 | call set_FAT |
||
3206 | pop edx |
||
3207 | jmp @f |
||
3208 | .first_cluster: |
||
3209 | ror edx, 16 |
||
3210 | mov [edi+20], dx |
||
3211 | ror edx, 16 |
||
3212 | mov [edi+26], dx |
||
3213 | @@: |
||
3214 | push ecx |
||
3215 | mov ecx, -1 |
||
3216 | call add_disk_free_space |
||
3217 | pop ecx |
||
3218 | mov eax, edx |
||
2643 | clevermous | 3219 | add [edi+28], esi |
2288 | clevermous | 3220 | jmp .extend_loop |
3221 | .extend_done: |
||
3222 | mov [edi+28], ecx |
||
2643 | clevermous | 3223 | pop edx esi |
2288 | clevermous | 3224 | xor eax, eax ; CF=0 |
3225 | ret |
||
3226 | .device_err3: |
||
3227 | pop edx |
||
3228 | jmp .device_err2 |
||
3229 | .disk_full: |
||
2643 | clevermous | 3230 | pop eax edx esi |
3598 | clevermous | 3231 | movi eax, ERROR_DISK_FULL |
2288 | clevermous | 3232 | stc |
3233 | ret |
||
3234 | |||
4273 | clevermous | 3235 | fat_update_datetime: |
3236 | call get_time_for_file |
||
3237 | mov [edi+22], ax ; last write time |
||
3238 | call get_date_for_file |
||
3239 | mov [edi+24], ax ; last write date |
||
3240 | mov [edi+18], ax ; last access date |
||
3241 | ret |
||
3242 | |||
3243 | |||
2288 | clevermous | 3244 | ;---------------------------------------------------------------- |
4273 | clevermous | 3245 | ; fat_SetFileEnd - FAT implementation of setting end-of-file |
2643 | clevermous | 3246 | ; in: ebp = pointer to FAT structure |
3247 | ; in: esi+[esp+4] = name |
||
3248 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
3249 | ; out: eax, ebx = return values for sysfunc 70 |
||
3250 | ;---------------------------------------------------------------- |
||
3251 | fat_SetFileEnd: |
||
3252 | call fat_lock |
||
3253 | push edi |
||
2288 | clevermous | 3254 | cmp byte [esi], 0 |
3255 | jnz @f |
||
3256 | .access_denied: |
||
3257 | push ERROR_ACCESS_DENIED |
||
2643 | clevermous | 3258 | .ret: |
3259 | call fat_unlock |
||
3260 | pop eax |
||
3261 | pop edi |
||
3262 | ret |
||
2288 | clevermous | 3263 | @@: |
2643 | clevermous | 3264 | stdcall hd_find_lfn, [esp+4+4] |
2288 | clevermous | 3265 | jnc @f |
2643 | clevermous | 3266 | .reteax: |
3267 | push eax |
||
2288 | clevermous | 3268 | jmp .ret |
3269 | @@: |
||
3270 | ; must not be directory |
||
3271 | test byte [edi+11], 10h |
||
2643 | clevermous | 3272 | jnz .access_denied |
2288 | clevermous | 3273 | ; file size must not exceed 4 Gb |
2643 | clevermous | 3274 | cmp dword [ebx+8], 0 |
2288 | clevermous | 3275 | jz @f |
3276 | push ERROR_END_OF_FILE |
||
3277 | jmp .ret |
||
3278 | @@: |
||
3279 | push eax ; save directory sector |
||
3280 | ; set file modification date/time to current |
||
3281 | call fat_update_datetime |
||
2643 | clevermous | 3282 | mov eax, [ebx+4] |
2288 | clevermous | 3283 | cmp eax, [edi+28] |
3284 | jb .truncate |
||
3285 | ja .expand |
||
3286 | pop eax |
||
2643 | clevermous | 3287 | lea ebx, [ebp+FAT.buffer] |
3288 | call fs_write32_sys |
||
3289 | test eax, eax |
||
2288 | clevermous | 3290 | jz @f |
2643 | clevermous | 3291 | push ERROR_DEVICE |
3292 | jmp .ret |
||
2288 | clevermous | 3293 | @@: |
2643 | clevermous | 3294 | push 0 |
3295 | jmp .ret |
||
2288 | clevermous | 3296 | .expand: |
3297 | push ebx ebp ecx |
||
3298 | push dword [edi+28] ; save old size |
||
3299 | mov ecx, eax |
||
3300 | call hd_extend_file |
||
3301 | push eax ; return code |
||
3302 | jnc .expand_ok |
||
3303 | cmp al, ERROR_DISK_FULL |
||
3304 | jz .disk_full |
||
3305 | .pop_ret: |
||
3306 | call update_disk |
||
2643 | clevermous | 3307 | pop eax ecx ecx ebp ebx ecx |
3308 | jmp .reteax |
||
2288 | clevermous | 3309 | .expand_ok: |
3310 | .disk_full: |
||
3311 | ; save directory |
||
3312 | mov eax, [edi+28] |
||
3313 | xchg eax, [esp+20] |
||
2643 | clevermous | 3314 | lea ebx, [ebp+FAT.buffer] |
3315 | call fs_write32_sys |
||
3316 | test eax, eax |
||
2288 | clevermous | 3317 | mov eax, [edi+20-2] |
3318 | mov ax, [edi+26] |
||
3319 | mov edi, eax |
||
3320 | jz @f |
||
3321 | .pop_ret11: |
||
2643 | clevermous | 3322 | mov byte [esp], ERROR_DEVICE |
2288 | clevermous | 3323 | jmp .pop_ret |
3324 | @@: |
||
2643 | clevermous | 3325 | test edi, edi |
3326 | jz .pop_ret |
||
2288 | clevermous | 3327 | ; now zero new data |
2643 | clevermous | 3328 | push 0 |
3329 | ; edi=current cluster, [esp]=sector in cluster |
||
3330 | ; [esp+24]=new size, [esp+8]=old size, [esp+4]=return code |
||
2288 | clevermous | 3331 | .zero_loop: |
2643 | clevermous | 3332 | cmp edi, 2 |
3333 | jb .error_fat |
||
3334 | cmp edi, [ebp+FAT.fatRESERVED] |
||
3335 | jae .error_fat |
||
3336 | sub dword [esp+8], 0x200 |
||
2288 | clevermous | 3337 | jae .next_cluster |
3338 | lea eax, [edi-2] |
||
2643 | clevermous | 3339 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3340 | add eax, [ebp+FAT.DATA_START] |
||
3341 | add eax, [esp] |
||
3342 | cmp dword [esp+8], -0x200 |
||
2288 | clevermous | 3343 | jz .noread |
2643 | clevermous | 3344 | push eax |
3345 | lea ebx, [ebp+FAT.buffer] |
||
3346 | call fs_read32_app |
||
3347 | test eax, eax |
||
3348 | pop eax |
||
2288 | clevermous | 3349 | jnz .err_next |
3350 | .noread: |
||
2643 | clevermous | 3351 | mov ecx, [esp+8] |
2288 | clevermous | 3352 | neg ecx |
3353 | push edi |
||
2643 | clevermous | 3354 | lea edi, [ebp+FAT.buffer+0x200] |
3355 | add edi, [esp+12] |
||
2288 | clevermous | 3356 | push eax |
3357 | xor eax, eax |
||
2643 | clevermous | 3358 | mov [esp+16], eax |
2288 | clevermous | 3359 | rep stosb |
3360 | pop eax |
||
3361 | pop edi |
||
2643 | clevermous | 3362 | call fs_write32_app |
3363 | test eax, eax |
||
2288 | clevermous | 3364 | jz .next_cluster |
3365 | .err_next: |
||
2643 | clevermous | 3366 | mov byte [esp+4], ERROR_DEVICE |
2288 | clevermous | 3367 | .next_cluster: |
2643 | clevermous | 3368 | pop eax |
2288 | clevermous | 3369 | sub dword [esp+20], 0x200 |
3370 | jbe .pop_ret |
||
2643 | clevermous | 3371 | inc eax |
3372 | push eax |
||
3373 | cmp eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2288 | clevermous | 3374 | jb .zero_loop |
2643 | clevermous | 3375 | and dword [esp], 0 |
2288 | clevermous | 3376 | mov eax, edi |
3377 | call get_FAT |
||
3378 | mov edi, eax |
||
2643 | clevermous | 3379 | jnc .zero_loop |
3380 | pop eax |
||
3381 | jmp .pop_ret11 |
||
2288 | clevermous | 3382 | .truncate: |
3383 | mov [edi+28], eax |
||
3384 | push ecx |
||
3385 | mov ecx, [edi+20-2] |
||
3386 | mov cx, [edi+26] |
||
3387 | push eax |
||
3388 | test eax, eax |
||
3389 | jz .zero_size |
||
3390 | ; find new last cluster |
||
3391 | @@: |
||
2643 | clevermous | 3392 | cmp ecx, 2 |
3393 | jb .error_fat2 |
||
3394 | cmp ecx, [ebp+FAT.fatRESERVED] |
||
3395 | jae .error_fat2 |
||
3396 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2288 | clevermous | 3397 | shl eax, 9 |
3398 | sub [esp], eax |
||
3399 | jbe @f |
||
3400 | mov eax, ecx |
||
3401 | call get_FAT |
||
3402 | mov ecx, eax |
||
2643 | clevermous | 3403 | jnc @b |
2288 | clevermous | 3404 | .device_err3: |
3405 | pop eax ecx eax edi |
||
2643 | clevermous | 3406 | call update_disk |
3407 | call fat_unlock |
||
3598 | clevermous | 3408 | movi eax, ERROR_DEVICE |
2288 | clevermous | 3409 | ret |
3410 | @@: |
||
3411 | ; we will zero data at the end of last sector - remember it |
||
3412 | push ecx |
||
3413 | ; terminate FAT chain |
||
3414 | push edx |
||
3415 | mov eax, ecx |
||
2643 | clevermous | 3416 | mov edx, [ebp+FAT.fatEND] |
2288 | clevermous | 3417 | call set_FAT |
3418 | mov eax, edx |
||
3419 | pop edx |
||
2643 | clevermous | 3420 | jnc @f |
2288 | clevermous | 3421 | .device_err4: |
3422 | pop ecx |
||
3423 | jmp .device_err3 |
||
3424 | .zero_size: |
||
3425 | and word [edi+20], 0 |
||
3426 | and word [edi+26], 0 |
||
3427 | push 0 |
||
3428 | mov eax, ecx |
||
3429 | @@: |
||
3430 | ; delete FAT chain |
||
3431 | call clear_cluster_chain |
||
2643 | clevermous | 3432 | jc .device_err4 |
2288 | clevermous | 3433 | ; save directory |
3434 | mov eax, [esp+12] |
||
3435 | push ebx |
||
2643 | clevermous | 3436 | lea ebx, [ebp+FAT.buffer] |
3437 | call fs_write32_sys |
||
2288 | clevermous | 3438 | pop ebx |
2643 | clevermous | 3439 | test eax, eax |
2288 | clevermous | 3440 | jnz .device_err4 |
3441 | ; zero last sector, ignore errors |
||
3442 | pop ecx |
||
3443 | pop eax |
||
3444 | dec ecx |
||
2643 | clevermous | 3445 | imul ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
3446 | add ecx, [ebp+FAT.DATA_START] |
||
2288 | clevermous | 3447 | push eax |
3448 | sar eax, 9 |
||
3449 | add ecx, eax |
||
3450 | pop eax |
||
3451 | and eax, 0x1FF |
||
3452 | jz .truncate_done |
||
3453 | push ebx eax |
||
3454 | mov eax, ecx |
||
2643 | clevermous | 3455 | lea ebx, [ebp+FAT.buffer] |
3456 | call fs_read32_app |
||
2288 | clevermous | 3457 | pop eax |
2643 | clevermous | 3458 | lea edi, [ebp+FAT.buffer+eax] |
2288 | clevermous | 3459 | push ecx |
3460 | mov ecx, 0x200 |
||
3461 | sub ecx, eax |
||
3462 | xor eax, eax |
||
3463 | rep stosb |
||
3464 | pop eax |
||
2643 | clevermous | 3465 | call fs_write32_app |
2288 | clevermous | 3466 | pop ebx |
3467 | .truncate_done: |
||
3468 | pop ecx eax edi |
||
3469 | call update_disk |
||
2643 | clevermous | 3470 | call fat_unlock |
2288 | clevermous | 3471 | xor eax, eax |
3472 | ret |
||
2643 | clevermous | 3473 | .error_fat: |
3474 | pop eax |
||
3475 | mov byte [esp], ERROR_FAT_TABLE |
||
3476 | jmp .pop_ret |
||
3477 | .error_fat2: |
||
3478 | pop eax ecx eax edi |
||
3479 | call update_disk |
||
3480 | call fat_unlock |
||
3598 | clevermous | 3481 | movi eax, ERROR_FAT_TABLE |
2643 | clevermous | 3482 | ret |
2288 | clevermous | 3483 | |
2643 | clevermous | 3484 | ;---------------------------------------------------------------- |
4273 | clevermous | 3485 | ; fat_GetFileInfo - FAT implementation of getting file info |
2643 | clevermous | 3486 | ; in: ebp = pointer to FAT structure |
3487 | ; in: esi+[esp+4] = name |
||
3488 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
3489 | ; out: eax, ebx = return values for sysfunc 70 |
||
3490 | ;---------------------------------------------------------------- |
||
3491 | fat_GetFileInfo: |
||
2288 | clevermous | 3492 | cmp byte [esi], 0 |
3493 | jnz @f |
||
3494 | mov eax, 2 |
||
3495 | ret |
||
3496 | @@: |
||
3497 | push edi |
||
2643 | clevermous | 3498 | call fat_lock |
3499 | stdcall hd_find_lfn, [esp+4+4] |
||
3500 | jc .error |
||
3501 | push ebp |
||
3502 | xor ebp, ebp |
||
3503 | mov esi, [ebx+16] |
||
3504 | mov dword [esi+4], ebp |
||
3505 | call fat_entry_to_bdfe2 |
||
3506 | pop ebp |
||
3507 | call fat_unlock |
||
3508 | xor eax, eax |
||
2288 | clevermous | 3509 | pop edi |
3510 | ret |
||
2643 | clevermous | 3511 | .error: |
3512 | push eax |
||
3513 | call fat_unlock |
||
3514 | pop eax |
||
3515 | pop edi |
||
3516 | ret |
||
2288 | clevermous | 3517 | |
2643 | clevermous | 3518 | ;---------------------------------------------------------------- |
4273 | clevermous | 3519 | ; fat_SetFileInfo - FAT implementation of setting file info |
2643 | clevermous | 3520 | ; in: ebp = pointer to FAT structure |
3521 | ; in: esi+[esp+4] = name |
||
3522 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
3523 | ; out: eax, ebx = return values for sysfunc 70 |
||
3524 | ;---------------------------------------------------------------- |
||
3525 | fat_SetFileInfo: |
||
2288 | clevermous | 3526 | cmp byte [esi], 0 |
3527 | jnz @f |
||
3528 | mov eax, 2 |
||
3529 | ret |
||
3530 | @@: |
||
3531 | push edi |
||
2643 | clevermous | 3532 | call fat_lock |
3533 | stdcall hd_find_lfn, [esp+4+4] |
||
3534 | jc .error |
||
2288 | clevermous | 3535 | push eax |
2643 | clevermous | 3536 | mov edx, [ebx+16] |
2288 | clevermous | 3537 | call bdfe_to_fat_entry |
3538 | pop eax |
||
2643 | clevermous | 3539 | lea ebx, [ebp+FAT.buffer] |
3540 | call fs_write32_sys |
||
2288 | clevermous | 3541 | call update_disk |
2643 | clevermous | 3542 | call fat_unlock |
2288 | clevermous | 3543 | pop edi |
3544 | xor eax, eax |
||
3545 | ret |
||
2643 | clevermous | 3546 | .error: |
3547 | push eax |
||
3548 | call fat_unlock |
||
3549 | pop eax |
||
3550 | pop edi |
||
3551 | ret |
||
2288 | clevermous | 3552 | |
3553 | ;---------------------------------------------------------------- |
||
4273 | clevermous | 3554 | ; fat_Delete - FAT implementation of deleting a file/folder |
2643 | clevermous | 3555 | ; in: ebp = pointer to FAT structure |
3556 | ; in: esi+[esp+4] = name |
||
3557 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
3558 | ; out: eax, ebx = return values for sysfunc 70 |
||
3559 | ;---------------------------------------------------------------- |
||
3560 | fat_Delete: |
||
3561 | call fat_lock |
||
2288 | clevermous | 3562 | cmp byte [esi], 0 |
3563 | jnz @f |
||
3564 | ; cannot delete root! |
||
3565 | .access_denied: |
||
3566 | push ERROR_ACCESS_DENIED |
||
2643 | clevermous | 3567 | .pop_ret: |
3568 | call fat_unlock |
||
3569 | pop eax |
||
3570 | xor ebx, ebx |
||
3571 | ret |
||
2288 | clevermous | 3572 | @@: |
2643 | clevermous | 3573 | and [ebp+FAT.longname_sec1], 0 |
3574 | and [ebp+FAT.longname_sec2], 0 |
||
2288 | clevermous | 3575 | push edi |
2643 | clevermous | 3576 | stdcall hd_find_lfn, [esp+4+4] |
2288 | clevermous | 3577 | jnc .found |
3578 | pop edi |
||
3579 | push ERROR_FILE_NOT_FOUND |
||
3580 | jmp .pop_ret |
||
3581 | .found: |
||
3582 | cmp dword [edi], '. ' |
||
3583 | jz .access_denied2 |
||
3584 | cmp dword [edi], '.. ' |
||
3585 | jz .access_denied2 |
||
3586 | test byte [edi+11], 10h |
||
3587 | jz .dodel |
||
3588 | ; we can delete only empty folders! |
||
3589 | pushad |
||
2643 | clevermous | 3590 | mov esi, [edi+20-2] |
3591 | mov si, [edi+26] |
||
2288 | clevermous | 3592 | xor ecx, ecx |
2643 | clevermous | 3593 | lea eax, [esi-2] |
3594 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
3595 | add eax, [ebp+FAT.DATA_START] |
||
3596 | lea ebx, [ebp+FAT.buffer] |
||
3597 | call fs_read32_sys |
||
3598 | test eax, eax |
||
2288 | clevermous | 3599 | jnz .err1 |
2643 | clevermous | 3600 | lea eax, [ebx+0x200] |
2288 | clevermous | 3601 | add ebx, 2*0x20 |
3602 | .checkempty: |
||
3603 | cmp byte [ebx], 0 |
||
3604 | jz .empty |
||
3605 | cmp byte [ebx], 0xE5 |
||
3606 | jnz .notempty |
||
3607 | add ebx, 0x20 |
||
2643 | clevermous | 3608 | cmp ebx, eax |
2288 | clevermous | 3609 | jb .checkempty |
3610 | inc ecx |
||
2643 | clevermous | 3611 | cmp ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 3612 | jb @f |
2643 | clevermous | 3613 | mov eax, esi |
2288 | clevermous | 3614 | call get_FAT |
2643 | clevermous | 3615 | jc .err1 |
3174 | clevermous | 3616 | cmp eax, 2 |
3617 | jb .error_fat |
||
3618 | cmp eax, [ebp+FAT.fatRESERVED] |
||
3619 | jae .empty |
||
2643 | clevermous | 3620 | mov esi, eax |
2288 | clevermous | 3621 | xor ecx, ecx |
3622 | @@: |
||
2643 | clevermous | 3623 | lea eax, [esi-2] |
3624 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
3625 | add eax, [ebp+FAT.DATA_START] |
||
2288 | clevermous | 3626 | add eax, ecx |
2643 | clevermous | 3627 | lea ebx, [ebp+FAT.buffer] |
3628 | call fs_read32_sys |
||
3629 | test eax, eax |
||
3630 | lea eax, [ebx+0x200] |
||
2288 | clevermous | 3631 | jz .checkempty |
3632 | .err1: |
||
3633 | popad |
||
3634 | .err2: |
||
3635 | pop edi |
||
2643 | clevermous | 3636 | call fat_unlock |
3598 | clevermous | 3637 | movi eax, ERROR_DEVICE |
2288 | clevermous | 3638 | ret |
3174 | clevermous | 3639 | .error_fat: |
3640 | popad |
||
3641 | pop edi |
||
3642 | call fat_unlock |
||
3598 | clevermous | 3643 | movi eax, ERROR_FAT_TABLE |
3174 | clevermous | 3644 | ret |
2288 | clevermous | 3645 | .notempty: |
3646 | popad |
||
3647 | .access_denied2: |
||
3648 | pop edi |
||
2643 | clevermous | 3649 | call fat_unlock |
3598 | clevermous | 3650 | movi eax, ERROR_ACCESS_DENIED |
2288 | clevermous | 3651 | ret |
3652 | .empty: |
||
3653 | popad |
||
2643 | clevermous | 3654 | push eax ebx |
3655 | lea ebx, [ebp+FAT.buffer] |
||
3656 | call fs_read32_sys |
||
3657 | test eax, eax |
||
3658 | pop ebx eax |
||
2288 | clevermous | 3659 | jnz .err2 |
3660 | .dodel: |
||
3661 | push eax |
||
3662 | mov eax, [edi+20-2] |
||
3663 | mov ax, [edi+26] |
||
3664 | xchg eax, [esp] |
||
3665 | ; delete folder entry |
||
3666 | mov byte [edi], 0xE5 |
||
3667 | ; delete LFN (if present) |
||
3668 | .lfndel: |
||
2643 | clevermous | 3669 | lea edx, [ebp+FAT.buffer] |
3670 | cmp edi, edx |
||
2288 | clevermous | 3671 | ja @f |
2643 | clevermous | 3672 | cmp [ebp+FAT.longname_sec2], 0 |
2288 | clevermous | 3673 | jz .lfndone |
2643 | clevermous | 3674 | push [ebp+FAT.longname_sec2] |
3675 | push [ebp+FAT.longname_sec1] |
||
3676 | pop [ebp+FAT.longname_sec2] |
||
3677 | and [ebp+FAT.longname_sec1], 0 |
||
2288 | clevermous | 3678 | push ebx |
2643 | clevermous | 3679 | mov ebx, edx |
3680 | call fs_write32_sys |
||
2288 | clevermous | 3681 | mov eax, [esp+4] |
2643 | clevermous | 3682 | call fs_read32_sys |
2288 | clevermous | 3683 | pop ebx |
3684 | pop eax |
||
2643 | clevermous | 3685 | lea edi, [ebp+FAT.buffer+0x200] |
2288 | clevermous | 3686 | @@: |
3687 | sub edi, 0x20 |
||
3688 | cmp byte [edi], 0xE5 |
||
3689 | jz .lfndone |
||
3690 | cmp byte [edi+11], 0xF |
||
3691 | jnz .lfndone |
||
3692 | mov byte [edi], 0xE5 |
||
3693 | jmp .lfndel |
||
3694 | .lfndone: |
||
3695 | push ebx |
||
2643 | clevermous | 3696 | lea ebx, [ebp+FAT.buffer] |
3697 | call fs_write32_sys |
||
2288 | clevermous | 3698 | pop ebx |
3699 | ; delete FAT chain |
||
3700 | pop eax |
||
3701 | call clear_cluster_chain |
||
3702 | call update_disk |
||
2643 | clevermous | 3703 | call fat_unlock |
2288 | clevermous | 3704 | pop edi |
3705 | xor eax, eax |
||
3706 | ret |
||
3707 | |||
3708 | ; \end{diamond}=>=>=>=>=>=>>65536 |