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Rev | Author | Line No. | Line |
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1 | ha | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; FAT32.INC ;; |
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4 | ;; ;; |
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5 | ;; FAT16/32 functions for MenuetOS ;; |
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6 | ;; ;; |
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7 | ;; Copyright 2002 Paolo Minazzi, paolo.minazzi@inwind.it ;; |
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8 | ;; ;; |
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9 | ;; See file COPYING for details ;; |
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86 | diamond | 10 | ;; 15.06.2006 LFN get/set file/folder info - diamond ;; |
83 | diamond | 11 | ;; 27.05.2006 LFN create/rewrite file - diamond ;; |
75 | diamond | 12 | ;; 04.05.2006 LFN read folder - diamond ;; |
74 | mario79 | 13 | ;; 29.04.2006 Elimination of hangup after the ;; |
14 | ;; expiration hd_wait_timeout - Mario79 ;; |
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75 | diamond | 15 | ;; 23.04.2006 LFN read file - diamond ;; |
65 | mario79 | 16 | ;; 28.01.2006 find all Fat16/32 partition in all input point ;; |
17 | ;; to MBR, see file part_set.inc - Mario79 ;; |
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1 | ha | 18 | ;; 15.01.2005 get file size/attr/date, file_append - ATV ;; |
19 | ;; 04.12.2004 skip volume label, file delete bug fixed - ATV ;; |
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20 | ;; 29.11.2004 get_free_FAT changed, append dir bug fixed - ATV ;; |
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21 | ;; 23.11.2004 don't allow overwrite dir with file - ATV ;; |
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22 | ;; 18.11.2004 get_disk_info and more error codes - ATV ;; |
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23 | ;; 17.11.2004 set_FAT/get_FAT and disk cache rewritten - ATV ;; |
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24 | ;; 10.11.2004 removedir clear whole directory structure - ATV ;; |
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25 | ;; 08.11.2004 rename - ATV ;; |
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26 | ;; 30.10.2004 file_read return also dirsize in bytes - ATV ;; |
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27 | ;; 20.10.2004 Makedir/Removedir - ATV ;; |
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28 | ;; 14.10.2004 Partition chain/Fat16 - ATV (thanks drh3xx) ;; |
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29 | ;; 06.9.2004 Fix free space by Mario79 added - MH ;; |
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30 | ;; 24.5.2004 Write back buffer for File_write -VT ;; |
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31 | ;; 20.5.2004 File_read function to work with syscall 58 - VT ;; |
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32 | ;; 30.3.2004 Error parameters at function return - VT ;; |
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33 | ;; 01.5.2002 Bugfix in device write - VT ;; |
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34 | ;; 20.5.2002 Hd status check - VT ;; |
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35 | ;; 29.6.2002 Improved fat32 verification - VT ;; |
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36 | ;; ;; |
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37 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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38 | |||
39 | cache_max equ 1919 ; max. is 1919*512+0x610000=0x6ffe00 |
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40 | |||
52 | mikedld | 41 | ERROR_SUCCESS = 0 |
42 | ERROR_DISK_BASE = 1 |
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43 | ERROR_UNSUPPORTED_FS = 2 |
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44 | ERROR_UNKNOWN_FS = 3 |
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45 | ERROR_PARTITION = 4 |
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46 | ERROR_FILE_NOT_FOUND = 5 |
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47 | ERROR_END_OF_FILE = 6 |
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48 | ERROR_MEMORY_POINTER = 7 |
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49 | ERROR_DISK_FULL = 8 |
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50 | ERROR_FAT_TABLE = 9 |
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51 | ERROR_ACCESS_DENIED = 10 |
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1 | ha | 52 | |
53 | PUSHAD_EAX equ [esp+28] |
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54 | PUSHAD_ECX equ [esp+24] |
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55 | PUSHAD_EDX equ [esp+20] |
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56 | PUSHAD_EBX equ [esp+16] |
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57 | PUSHAD_EBP equ [esp+8] |
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58 | PUSHAD_ESI equ [esp+4] |
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59 | PUSHAD_EDI equ [esp+0] |
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60 | |||
61 | cluster dd 0 ; used by file_write,makedir,append |
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62 | partition_count dd 0 ; partitions found by set_FAT32_variables |
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63 | longname_sec1 dd 0 ; used by analyze_directory to save 2 previous |
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64 | longname_sec2 dd 0 ; directory sectors for delete long filename |
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65 | |||
66 | hd_error dd 0 ; set by wait_for_sector_buffer |
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67 | hd_setup dd 0 |
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68 | hd_wait_timeout dd 0 |
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69 | |||
70 | cluster_tmp dd 0 ; used by analyze_directory |
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71 | ; and analyze_directory_to_write |
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72 | |||
73 | file_size dd 0 ; used by file_read |
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74 | |||
75 | sector_tmp dd 0 ; used by rename,append,file_write |
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76 | entry_pos dd 0 ; used by rename,append,file_write |
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77 | |||
78 | old_filesize dd 0 ; used by append |
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79 | new_filepos dd 0 ; used by append |
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80 | bytes2write dd 0 ; used by append |
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81 | |||
82 | cache_search_start dd 0 ; used by find_empty_slot |
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83 | |||
84 | fat_in_cache dd -1 |
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85 | fat_cache: times 512 db 0 |
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86 | |||
87 | uglobal |
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88 | Sector512: ; label for dev_hdcd.inc |
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89 | buffer: times 512 db 0 |
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90 | deltree_buffer: times 512 db 0 |
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91 | endg |
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92 | |||
93 | iglobal |
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94 | NewDirEntry1 db ". ",0x10 |
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95 | times 20 db 0 |
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96 | NewDirEntry2 db ".. ",0x10 |
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97 | times 20 db 0 |
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98 | endg |
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99 | |||
100 | uglobal |
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101 | dir_entry: times 32 db 0 |
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102 | |||
103 | startpath: times 255 db 0 |
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104 | |||
105 | fat16_root db 0 ; flag for fat16 rootdir |
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106 | f_del db 0 ; 1=overwrite fat entry |
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107 | fat_change db 0 ; 1=fat has changed |
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108 | |||
109 | endg |
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110 | |||
111 | reserve_hd1: |
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112 | |||
113 | cli |
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114 | cmp [hd1_status],0 |
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115 | je reserve_ok1 |
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116 | |||
117 | sti |
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118 | call change_task |
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119 | jmp reserve_hd1 |
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120 | |||
121 | reserve_ok1: |
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122 | |||
123 | push eax |
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124 | mov eax,[0x3000] |
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125 | shl eax,5 |
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126 | mov eax,[eax+0x3000+4] |
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127 | mov [hd1_status],eax |
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128 | pop eax |
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129 | sti |
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130 | ret |
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131 | |||
132 | |||
133 | clear_hd_cache: |
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134 | |||
135 | push eax ecx edi |
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136 | mov edi,0x600000 |
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137 | mov ecx,16384 |
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138 | xor eax,eax |
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139 | cld |
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140 | rep stosd ; clear hd cache with 0 |
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141 | mov [cache_search_start],eax |
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142 | mov [fat_in_cache],-1 |
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143 | mov [fat_change],0 |
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144 | pop edi ecx eax |
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145 | ret |
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146 | |||
147 | problem_partition db 0 ; used for partitions search |
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148 | |||
65 | mario79 | 149 | include 'part_set.inc' |
1 | ha | 150 | |
151 | set_FAT: |
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152 | ;-------------------------------- |
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153 | ; input : EAX = cluster |
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154 | ; EDX = value to save |
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155 | ; output : EDX = old value |
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156 | ;-------------------------------- |
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157 | push eax ebx esi |
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158 | |||
159 | cmp eax,2 |
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160 | jb sfc_error |
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161 | cmp eax,[LAST_CLUSTER] |
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162 | ja sfc_error |
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163 | cmp [fat_type],16 |
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164 | je sfc_1 |
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165 | add eax,eax |
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166 | sfc_1: |
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167 | add eax,eax |
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168 | mov esi,511 |
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169 | and esi,eax ; esi = position in fat sector |
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170 | shr eax,9 ; eax = fat sector |
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171 | add eax,[FAT_START] |
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172 | mov ebx,fat_cache |
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173 | |||
174 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
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175 | je sfc_in_cache ; yes |
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176 | |||
177 | cmp [fat_change],0 ; is fat changed? |
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178 | je sfc_no_change ; no |
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179 | call write_fat_sector ; yes. write it into disk |
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74 | mario79 | 180 | cmp [hd_error],0 |
181 | jne sfc_error |
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1 | ha | 182 | |
183 | sfc_no_change: |
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184 | mov [fat_in_cache],eax ; save fat sector |
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185 | call hd_read |
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74 | mario79 | 186 | cmp [hd_error],0 |
187 | jne sfc_error |
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188 | |||
1 | ha | 189 | |
190 | sfc_in_cache: |
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191 | cmp [fat_type],16 |
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192 | jne sfc_test32 |
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193 | |||
194 | cmp [f_del],1 ; overwrite previous value? |
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195 | je sfc_set16 ; yes |
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196 | cmp word [ebx+esi],0 ; is cluster free? |
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197 | je sfc_set16 ; yes |
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198 | mov dword [8*0x100000],0xffffff |
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199 | mov edx,[ebx+esi] ; get old value |
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200 | jmp sfc_nonzero |
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201 | |||
202 | sfc_set16: |
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203 | xchg [ebx+esi],dx ; save new value and get old value |
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204 | jmp sfc_write |
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205 | |||
206 | sfc_test32: |
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207 | mov eax,[fatMASK] |
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208 | cmp [f_del],1 ; overwrite previous value? |
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209 | je sfc_set32 ; yes |
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210 | test eax,[ebx+esi] ; is cluster free? |
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211 | je sfc_set32 ; yes |
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212 | mov dword [8*0x100000],0xffffff |
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213 | mov edx,[ebx+esi] ; get old value |
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214 | jmp sfc_nonzero |
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215 | |||
216 | sfc_set32: |
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217 | and edx,eax |
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218 | xor eax,-1 ; mask for high bits |
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219 | and eax,[ebx+esi] ; get high 4 bits |
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220 | or eax,edx |
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221 | mov edx,[ebx+esi] ; get old value |
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222 | mov [ebx+esi],eax ; save new value |
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223 | |||
224 | sfc_write: |
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225 | mov [fat_change],1 ; fat has changed |
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226 | |||
227 | sfc_nonzero: |
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228 | and edx,[fatMASK] |
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229 | |||
230 | sfc_error: |
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231 | pop esi ebx eax |
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232 | ret |
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233 | |||
234 | |||
235 | get_FAT: |
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236 | ;-------------------------------- |
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237 | ; input : EAX = cluster |
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238 | ; output : EAX = next cluster |
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239 | ;-------------------------------- |
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240 | push ebx esi |
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241 | |||
242 | cmp [fat_type],16 |
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243 | je gfc_1 |
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244 | add eax,eax |
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245 | gfc_1: |
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246 | add eax,eax |
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247 | mov esi,511 |
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248 | and esi,eax ; esi = position in fat sector |
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249 | shr eax,9 ; eax = fat sector |
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250 | add eax,[FAT_START] |
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251 | mov ebx,fat_cache |
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252 | |||
253 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
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254 | je gfc_in_cache |
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255 | |||
256 | cmp [fat_change],0 ; is fat changed? |
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257 | je gfc_no_change ; no |
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258 | call write_fat_sector ; yes. write it into disk |
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74 | mario79 | 259 | cmp [hd_error],0 |
260 | jne hd_error_01 |
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1 | ha | 261 | |
262 | gfc_no_change: |
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263 | mov [fat_in_cache],eax |
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264 | call hd_read |
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74 | mario79 | 265 | cmp [hd_error],0 |
266 | jne hd_error_01 |
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1 | ha | 267 | |
268 | gfc_in_cache: |
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269 | mov eax,[ebx+esi] |
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270 | and eax,[fatMASK] |
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74 | mario79 | 271 | hd_error_01: |
1 | ha | 272 | pop esi ebx |
273 | ret |
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274 | |||
275 | |||
276 | get_free_FAT: |
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277 | ;----------------------------------------------------------- |
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278 | ; input : EAX = # cluster for start the searching |
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279 | ; output : if CARRY=0 EAX = # first cluster found free |
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280 | ; if CARRY=1 disk full |
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281 | ; Note : for more speed need to use fat_cache directly |
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282 | ;----------------------------------------------------------- |
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283 | push ecx |
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284 | mov ecx,[LAST_CLUSTER] ; counter for full disk |
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285 | sub ecx,2 |
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286 | |||
287 | gff_test: |
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288 | cmp eax,[LAST_CLUSTER] ; if above last cluster start at cluster 2 |
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289 | jbe gff_in_range |
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290 | mov eax,2 |
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291 | |||
292 | gff_in_range: |
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293 | push eax |
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294 | call get_FAT ; get cluster state |
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74 | mario79 | 295 | cmp [hd_error],0 |
296 | jne gff_not_found_1 |
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297 | |||
1 | ha | 298 | test eax,eax ; is it free? |
299 | pop eax |
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300 | je gff_found ; yes |
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301 | inc eax ; next cluster |
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302 | dec ecx ; is all checked? |
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303 | jns gff_test ; no |
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304 | |||
74 | mario79 | 305 | gff_not_found_1: |
306 | add esp,4 |
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1 | ha | 307 | gff_not_found: |
308 | pop ecx ; yes. disk is full |
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309 | stc |
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310 | ret |
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311 | |||
312 | gff_found: |
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313 | pop ecx |
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314 | clc |
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315 | ret |
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316 | |||
317 | |||
318 | write_fat_sector: |
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319 | ;----------------------------------------------------------- |
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320 | ; write changed fat to disk |
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321 | ;----------------------------------------------------------- |
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322 | push eax ebx ecx |
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323 | |||
324 | mov [fat_change],0 |
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325 | mov eax,[fat_in_cache] |
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326 | cmp eax,-1 |
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327 | jz write_fat_not_used |
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328 | mov ebx,fat_cache |
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329 | mov ecx,[NUMBER_OF_FATS] |
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330 | |||
331 | write_next_fat: |
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332 | call hd_write |
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74 | mario79 | 333 | cmp [hd_error],0 |
334 | jne write_fat_not_used |
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335 | |||
1 | ha | 336 | add eax,[SECTORS_PER_FAT] |
337 | dec ecx |
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338 | jnz write_next_fat |
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339 | |||
340 | write_fat_not_used: |
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341 | pop ecx ebx eax |
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342 | ret |
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343 | |||
344 | |||
345 | analyze_directory: |
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346 | ;----------------------------------------------------------- |
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347 | ; input : EAX = first cluster of the directory |
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348 | ; EBX = pointer to filename |
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349 | ; output : IF CARRY=0 EAX = sector where th file is found |
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350 | ; EBX = pointer in buffer |
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351 | ; [buffer .. buffer+511] |
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352 | ; ECX,EDX,ESI,EDI not changed |
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353 | ; IF CARRY=1 filename not found |
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354 | ; Note : if cluster=0 it's changed to read rootdir |
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355 | ; save 2 previous directory sectors in longname_sec |
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356 | ;----------------------------------------------------------- |
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357 | push ecx edx esi edi ebx ; ebx = [esp+0] |
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358 | mov [longname_sec1],0 |
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359 | mov [longname_sec2],0 |
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360 | |||
361 | adr_new_cluster: |
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362 | mov [cluster_tmp],eax |
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363 | mov [fat16_root],0 |
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364 | cmp eax,[LAST_CLUSTER] |
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365 | ja adr_not_found ; too big cluster number, something is wrong |
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366 | cmp eax,2 |
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367 | jnb adr_data_cluster |
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368 | |||
369 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
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370 | cmp [fat_type],16 |
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371 | jne adr_data_cluster |
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372 | mov eax,[ROOT_START] |
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373 | mov edx,[ROOT_SECTORS] |
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374 | mov [fat16_root],1 ; flag for fat16 rootdir |
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375 | jmp adr_new_sector |
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376 | |||
377 | adr_data_cluster: |
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378 | sub eax,2 |
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379 | mov edx,[SECTORS_PER_CLUSTER] |
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380 | imul eax,edx |
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381 | add eax,[DATA_START] |
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382 | |||
383 | adr_new_sector: |
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384 | mov ebx,buffer |
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385 | call hd_read |
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74 | mario79 | 386 | cmp [hd_error],0 |
387 | jne adr_not_found |
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388 | |||
1 | ha | 389 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
390 | |||
391 | adr_analyze: |
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392 | mov edi,[ebx+11] ; file attribute |
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393 | and edi,0xf |
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394 | cmp edi,0xf |
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395 | je adr_long_filename |
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396 | test edi,0x8 ; skip over volume label |
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397 | jne adr_long_filename ; Note: label can be same name as file/dir |
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398 | |||
399 | mov esi,[esp+0] ; filename need to be uppercase |
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400 | mov edi,ebx |
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401 | push ecx |
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402 | mov ecx,11 |
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403 | cld |
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404 | rep cmpsb ; compare 8+3 filename |
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405 | pop ecx |
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406 | je adr_found |
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407 | |||
408 | adr_long_filename: |
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409 | add ebx,32 ; position of next dir entry |
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410 | dec ecx |
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411 | jnz adr_analyze |
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412 | |||
413 | mov ecx,[longname_sec1] ; save 2 previous directory sectors |
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414 | mov [longname_sec1],eax ; for delete long filename |
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415 | mov [longname_sec2],ecx |
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416 | inc eax ; next sector |
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417 | dec edx |
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418 | jne adr_new_sector |
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419 | cmp [fat16_root],1 ; end of fat16 rootdir |
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420 | je adr_not_found |
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421 | |||
422 | adr_next_cluster: |
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423 | mov eax,[cluster_tmp] |
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424 | call get_FAT ; get next cluster |
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74 | mario79 | 425 | cmp [hd_error],0 |
426 | jne adr_not_found |
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427 | |||
1 | ha | 428 | cmp eax,2 ; incorrect fat chain? |
429 | jb adr_not_found ; yes |
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430 | cmp eax,[fatRESERVED] ; is it end of directory? |
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431 | jb adr_new_cluster ; no. analyse it |
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432 | |||
433 | adr_not_found: |
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434 | pop edi edi esi edx ecx ; first edi will remove ebx |
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435 | stc ; file not found |
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436 | ret |
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437 | |||
438 | adr_found: |
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439 | pop edi edi esi edx ecx ; first edi will remove ebx |
||
440 | clc ; file found |
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441 | ret |
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442 | |||
443 | |||
444 | analyze_directory_to_write: |
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445 | ;----------------------------------------------------------- |
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446 | ; input : EAX = first cluster of the directory |
||
447 | ; output : IF CARRY=0 EAX = sector where the empty pos is found |
||
448 | ; EBX = pointer in buffer |
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449 | ; [buffer .. buffer+511] |
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450 | ; ECX,EDX,ESI,EDI not changed |
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451 | ; IF CARRY=1 disk full or fat corrupted |
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452 | ; Note : if cluster=0 it's changed to read rootdir |
||
453 | ;----------------------------------------------------------- |
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454 | push ecx edx edi |
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455 | |||
456 | adw_new_cluster: |
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457 | mov [cluster_tmp],eax |
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458 | mov [fat16_root],0 |
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459 | cmp eax,[LAST_CLUSTER] |
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460 | ja adw_not_found ; too big cluster number, something is wrong |
||
461 | cmp eax,2 |
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462 | jnb adw_data_cluster |
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463 | |||
464 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
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465 | cmp [fat_type],16 |
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466 | jne adw_data_cluster |
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467 | mov eax,[ROOT_START] |
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468 | mov edx,[ROOT_SECTORS] |
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469 | mov [fat16_root],1 ; flag for fat16 rootdir |
||
470 | jmp adw_new_sector |
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471 | |||
472 | adw_data_cluster: |
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473 | sub eax,2 |
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474 | mov edx,[SECTORS_PER_CLUSTER] |
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475 | imul eax,edx |
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476 | add eax,[DATA_START] |
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477 | |||
478 | adw_new_sector: |
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479 | mov ebx,buffer |
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480 | call hd_read |
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74 | mario79 | 481 | cmp [hd_error],0 |
482 | jne adw_not_found |
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483 | |||
1 | ha | 484 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
485 | |||
486 | adw_analyze: |
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487 | cmp byte [ebx],0x00 ; is free entry? |
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488 | je adw_found ; yes |
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489 | cmp byte [ebx],0xe5 ; is deleted entry? |
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490 | je adw_found ; yes |
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491 | add ebx,32 ; position of next dir entry |
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492 | dec ecx |
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493 | jnz adw_analyze |
||
494 | |||
495 | inc eax ; next sector |
||
496 | dec edx |
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497 | jne adw_new_sector |
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498 | cmp [fat16_root],1 ; end of fat16 rootdir |
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499 | je adw_not_found |
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500 | |||
501 | mov eax,[cluster_tmp] |
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502 | call get_FAT ; get next cluster |
||
74 | mario79 | 503 | cmp [hd_error],0 |
504 | jne adw_not_found |
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505 | |||
1 | ha | 506 | cmp eax,2 ; incorrect fat chain? |
507 | jb adw_not_found ; yes |
||
508 | cmp eax,[fatRESERVED] ; is it end of directory? |
||
509 | jb adw_new_cluster ; no. analyse it |
||
510 | |||
511 | mov eax,2 ; this block of code add a new cluster |
||
512 | call get_free_FAT ; for the directory because the directory |
||
513 | jc adw_not_found ; is full |
||
514 | |||
515 | mov edx,[fatEND] ; new end for directory |
||
516 | call set_FAT |
||
74 | mario79 | 517 | cmp [hd_error],0 |
518 | jne adw_not_found |
||
1 | ha | 519 | |
520 | push eax ; save new cluster |
||
521 | mov edx,eax |
||
522 | mov eax,[cluster_tmp] ; change last cluster to point new cluster |
||
523 | mov [f_del],1 |
||
524 | call set_FAT |
||
74 | mario79 | 525 | cmp [hd_error],0 |
526 | jne adw_not_found_1 |
||
527 | |||
1 | ha | 528 | mov [f_del],0 |
529 | |||
530 | mov ecx,-1 ; remove 1 cluster from free disk space |
||
531 | call add_disk_free_space |
||
74 | mario79 | 532 | cmp [hd_error],0 |
533 | jne adw_not_found_1 |
||
1 | ha | 534 | |
535 | mov ecx,512/4 |
||
536 | xor eax,eax |
||
537 | mov edi,buffer |
||
538 | cld |
||
539 | rep stosd ; clear new directory cluster |
||
540 | pop eax |
||
541 | |||
542 | sub eax,2 |
||
543 | mov ecx,[SECTORS_PER_CLUSTER] |
||
544 | imul eax,ecx |
||
545 | add eax,[DATA_START] |
||
546 | mov ebx,buffer |
||
547 | push eax ; save sector number |
||
548 | |||
549 | adw_set_empty_directory: |
||
550 | call hd_write |
||
74 | mario79 | 551 | cmp [hd_error],0 |
552 | jne adw_not_found_1 |
||
553 | |||
1 | ha | 554 | inc eax ; next sector |
555 | dec ecx |
||
556 | jnz adw_set_empty_directory |
||
557 | |||
558 | pop eax |
||
559 | |||
560 | adw_found: |
||
561 | pop edi edx ecx |
||
562 | clc ; free space found |
||
563 | ret |
||
74 | mario79 | 564 | adw_not_found_1: |
565 | add esp,4 |
||
1 | ha | 566 | adw_not_found: |
567 | pop edi edx ecx |
||
568 | stc ; free space not found |
||
569 | ret |
||
570 | |||
571 | |||
572 | get_data_cluster: |
||
573 | ;----------------------------------------------------------- |
||
574 | ; input : EAX = cluster |
||
575 | ; EBX = pointer to buffer |
||
576 | ; EDX = # blocks to read in buffer |
||
577 | ; ESI = # blocks to skip over |
||
578 | ; output : if CARRY=0 ok EBX/EDX/ESI updated |
||
579 | ; if CARRY=1 cluster out of range |
||
580 | ; Note : if cluster=0 it's changed to read rootdir |
||
581 | ;----------------------------------------------------------- |
||
582 | push eax ecx |
||
583 | |||
584 | mov [fat16_root],0 |
||
585 | cmp eax,[LAST_CLUSTER] |
||
586 | ja gdc_error ; too big cluster number, something is wrong |
||
587 | cmp eax,2 |
||
588 | jnb gdc_cluster |
||
589 | |||
590 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
||
591 | cmp [fat_type],16 |
||
592 | jne gdc_cluster |
||
593 | mov eax,[ROOT_START] |
||
594 | mov ecx,[ROOT_SECTORS] ; Note: not cluster size |
||
595 | mov [fat16_root],1 ; flag for fat16 rootdir |
||
596 | jmp gdc_read |
||
597 | |||
598 | gdc_cluster: |
||
599 | sub eax,2 |
||
600 | mov ecx,[SECTORS_PER_CLUSTER] |
||
601 | imul eax,ecx |
||
602 | add eax,[DATA_START] |
||
603 | |||
604 | gdc_read: |
||
605 | test esi,esi ; first wanted block |
||
606 | je gdcl1 ; yes, skip count is 0 |
||
607 | dec esi |
||
608 | jmp gdcl2 |
||
609 | |||
610 | gdcl1: |
||
611 | call hd_read |
||
74 | mario79 | 612 | cmp [hd_error],0 |
613 | jne gdc_error |
||
614 | |||
1 | ha | 615 | add ebx,512 ; update pointer |
616 | dec edx |
||
617 | |||
618 | gdcl2: |
||
619 | test edx,edx ; is all read? |
||
620 | je out_of_read |
||
621 | |||
622 | inc eax ; next sector |
||
623 | dec ecx |
||
624 | jnz gdc_read |
||
625 | |||
626 | out_of_read: |
||
627 | pop ecx eax |
||
628 | clc |
||
629 | ret |
||
630 | |||
631 | gdc_error: |
||
632 | pop ecx eax |
||
633 | stc |
||
634 | ret |
||
635 | |||
636 | |||
637 | set_data_cluster: |
||
638 | ;----------------------------------------------------------- |
||
639 | ; input : EAX = cluster |
||
640 | ; EBX = pointer to buffer |
||
641 | ; output : if CARRY=0 ok |
||
642 | ; if CARRY=1 cluster out of range |
||
643 | ;----------------------------------------------------------- |
||
644 | push eax ebx edx |
||
645 | |||
646 | cmp eax,[LAST_CLUSTER] |
||
647 | ja sdc_error ; too big cluster number, something is wrong |
||
648 | sub eax,2 |
||
649 | jb sdc_error ; don't allow rootdir write |
||
650 | |||
651 | mov edx,[SECTORS_PER_CLUSTER] |
||
652 | imul eax,edx |
||
653 | add eax,[DATA_START] |
||
654 | |||
655 | sdc_write: |
||
656 | call hd_write |
||
74 | mario79 | 657 | cmp [hd_error],0 |
658 | jne sdc_error |
||
659 | |||
1 | ha | 660 | add ebx,512 ; update pointer |
661 | inc eax |
||
662 | dec edx |
||
663 | jnz sdc_write |
||
664 | pop edx ebx eax |
||
665 | clc |
||
666 | ret |
||
667 | |||
668 | sdc_error: |
||
669 | pop edx ebx eax |
||
670 | stc |
||
671 | ret |
||
672 | |||
673 | |||
674 | get_cluster_of_a_path: |
||
675 | ;--------------------------------------------------------- |
||
676 | ; input : EBX = pointer to a path string |
||
677 | ; (example: the path "/files/data/document" become |
||
678 | ; "files......data.......document...0" |
||
679 | ; '.' = space char |
||
680 | ; '0' = char(0) (ASCII=0) !!! ) |
||
681 | ; output : if (CARRY=1) -> ERROR in the PATH |
||
682 | ; if (CARRY=0) -> EAX=cluster |
||
683 | ;--------------------------------------------------------- |
||
684 | push ebx edx |
||
685 | |||
686 | mov eax,[ROOT_CLUSTER] |
||
687 | mov edx,ebx |
||
688 | |||
689 | search_end_of_path: |
||
690 | cmp byte [edx],0 |
||
691 | je found_end_of_path |
||
692 | |||
693 | inc edx ; '/' |
||
694 | mov ebx,edx |
||
695 | call analyze_directory |
||
696 | jc directory_not_found |
||
697 | |||
698 | mov eax,[ebx+20-2] ; read the HIGH 16bit cluster field |
||
699 | mov ax,[ebx+26] ; read the LOW 16bit cluster field |
||
700 | and eax,[fatMASK] |
||
701 | add edx,11 ; 8+3 (name+extension) |
||
702 | jmp search_end_of_path |
||
703 | |||
704 | found_end_of_path: |
||
705 | pop edx ebx |
||
706 | clc ; no errors |
||
707 | ret |
||
708 | |||
709 | directory_not_found: |
||
710 | pop edx ebx |
||
711 | stc ; errors occour |
||
712 | ret |
||
713 | |||
714 | |||
715 | bcd2bin: |
||
716 | ;---------------------------------- |
||
717 | ; input : AL=BCD number (eg. 0x11) |
||
718 | ; output : AH=0 |
||
719 | ; AL=decimal number (eg. 11) |
||
720 | ;---------------------------------- |
||
721 | xor ah,ah |
||
722 | shl ax,4 |
||
723 | shr al,4 |
||
724 | aad |
||
725 | ret |
||
726 | |||
727 | |||
728 | get_date_for_file: |
||
729 | ;----------------------------------------------------- |
||
730 | ; Get date from CMOS and pack day,month,year in AX |
||
731 | ; DATE bits 0..4 : day of month 0..31 |
||
732 | ; 5..8 : month of year 1..12 |
||
733 | ; 9..15 : count of years from 1980 |
||
734 | ;----------------------------------------------------- |
||
735 | mov al,0x7 ;day |
||
736 | out 0x70,al |
||
737 | in al,0x71 |
||
738 | call bcd2bin |
||
739 | ror eax,5 |
||
740 | |||
741 | mov al,0x8 ;month |
||
742 | out 0x70,al |
||
743 | in al,0x71 |
||
744 | call bcd2bin |
||
745 | ror eax,4 |
||
746 | |||
747 | mov al,0x9 ;year |
||
748 | out 0x70,al |
||
749 | in al,0x71 |
||
750 | call bcd2bin |
||
751 | add ax,20 ;because CMOS return only the two last |
||
752 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
||
753 | rol eax,9 ;need the difference with 1980 (eg. 2001-1980) |
||
754 | ret |
||
755 | |||
756 | |||
757 | get_time_for_file: |
||
758 | ;----------------------------------------------------- |
||
759 | ; Get time from CMOS and pack hour,minute,second in AX |
||
760 | ; TIME bits 0..4 : second (the low bit is lost) |
||
761 | ; 5..10 : minute 0..59 |
||
762 | ; 11..15 : hour 0..23 |
||
763 | ;----------------------------------------------------- |
||
764 | mov al,0x0 ;second |
||
765 | out 0x70,al |
||
766 | in al,0x71 |
||
767 | call bcd2bin |
||
768 | ror eax,6 |
||
769 | |||
770 | mov al,0x2 ;minute |
||
771 | out 0x70,al |
||
772 | in al,0x71 |
||
773 | call bcd2bin |
||
774 | ror eax,6 |
||
775 | |||
776 | mov al,0x4 ;hour |
||
777 | out 0x70,al |
||
778 | in al,0x71 |
||
779 | call bcd2bin |
||
780 | rol eax,11 |
||
781 | ret |
||
782 | |||
783 | |||
784 | set_current_time_for_entry: |
||
785 | ;----------------------------------------------------- |
||
786 | ; Set current time/date for file entry |
||
787 | ; input : ebx = file entry pointer |
||
788 | ;----------------------------------------------------- |
||
789 | push eax |
||
790 | call get_time_for_file ; update files date/time |
||
791 | mov [ebx+22],ax |
||
792 | call get_date_for_file |
||
793 | mov [ebx+24],ax |
||
794 | pop eax |
||
795 | ret |
||
796 | |||
797 | |||
798 | makedir: |
||
799 | ;----------------------------------------------------- |
||
800 | ; input : eax = directory name |
||
801 | ; edx = path |
||
802 | ; output : eax = 0 - ok |
||
803 | ; 3 - unknown FS |
||
804 | ; 5 - file not found |
||
805 | ; 8 - disk full |
||
806 | ; 10 - access denied |
||
807 | ; Note : can only make one directory at time |
||
808 | ;----------------------------------------------------- |
||
809 | cmp [fat_type],0 |
||
810 | jnz make_dir_fat_ok |
||
811 | mov eax,ERROR_UNKNOWN_FS |
||
812 | ret |
||
813 | |||
814 | make_dir_fat_ok: |
||
815 | ; call reserve_hd1 |
||
816 | |||
817 | pushad |
||
818 | |||
819 | mov ebx,edx |
||
820 | call get_cluster_of_a_path |
||
821 | jnc make_dir_found_path |
||
74 | mario79 | 822 | cmp [hd_error],0 |
823 | jne make_dir_error_1 |
||
1 | ha | 824 | |
825 | make_dir_path_not_found: |
||
826 | popad |
||
827 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 828 | cmp [hd_error],0 |
829 | jne make_dir_error_2 |
||
830 | |||
1 | ha | 831 | mov [hd1_status],0 |
832 | mov eax,ERROR_FILE_NOT_FOUND |
||
833 | ret |
||
834 | |||
835 | make_dir_disk_full: |
||
74 | mario79 | 836 | cmp [hd_error],0 |
837 | jne make_dir_error_1 |
||
1 | ha | 838 | popad |
839 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 840 | cmp [hd_error],0 |
841 | jne make_dir_error_2 |
||
842 | |||
1 | ha | 843 | mov [hd1_status],0 |
844 | mov eax,ERROR_DISK_FULL |
||
845 | ret |
||
846 | |||
847 | make_dir_already_exist: |
||
74 | mario79 | 848 | cmp [hd_error],0 |
849 | jne make_dir_error_1 |
||
1 | ha | 850 | mov eax,[cluster] ; directory cluster |
851 | xor edx,edx ; free |
||
852 | mov [f_del],1 |
||
853 | call set_FAT |
||
74 | mario79 | 854 | cmp [hd_error],0 |
855 | jne make_dir_error_1 |
||
856 | |||
1 | ha | 857 | mov [f_del],0 |
858 | |||
859 | popad |
||
860 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 861 | make_dir_error_2: |
1 | ha | 862 | mov [hd1_status],0 |
863 | mov eax,ERROR_ACCESS_DENIED |
||
864 | ret |
||
865 | |||
74 | mario79 | 866 | make_dir_error_1: |
867 | popad |
||
868 | jmp make_dir_error_2 |
||
869 | |||
870 | make_dir_error_3: |
||
871 | add esp,4 |
||
872 | jmp make_dir_error_1 |
||
873 | |||
1 | ha | 874 | make_dir_found_path: |
875 | cmp eax,[ROOT_CLUSTER] |
||
876 | jnz make_dir_not_root |
||
877 | xor eax,eax |
||
878 | |||
879 | make_dir_not_root: |
||
880 | mov ecx,eax ; directorys start cluster |
||
881 | mov word [NewDirEntry2+26],cx ; 16 bits low of cluster |
||
882 | shr ecx,16 |
||
883 | mov word [NewDirEntry2+20],cx ; 16 bits high of cluster (=0 fat16) |
||
884 | |||
885 | push eax ; save parent directory cluster |
||
886 | mov eax,2 |
||
887 | call get_free_FAT |
||
888 | mov [cluster],eax ; first free cluster |
||
889 | pop eax |
||
890 | jc make_dir_disk_full |
||
891 | |||
892 | push eax |
||
893 | mov eax,[cluster] ; directory cluster |
||
894 | mov edx,[fatEND] ; end for directory |
||
895 | call set_FAT |
||
74 | mario79 | 896 | cmp [hd_error],0 |
897 | jne make_dir_error_3 |
||
1 | ha | 898 | pop eax |
899 | |||
900 | mov ebx,PUSHAD_EAX ; dir name |
||
901 | push eax |
||
902 | call analyze_directory ; check if directory already exist |
||
74 | mario79 | 903 | cmp [hd_error],0 |
904 | jne make_dir_error_1 |
||
905 | |||
1 | ha | 906 | pop eax |
907 | jnc make_dir_already_exist ; need to free allocated cluster! |
||
908 | |||
909 | call analyze_directory_to_write |
||
910 | jc make_dir_already_exist ; need to free allocated cluster! |
||
911 | |||
912 | mov esi,PUSHAD_EAX ; dir name |
||
913 | mov edi,ebx ; pointer in buffer |
||
914 | mov ecx,11 |
||
915 | cld |
||
916 | rep movsb |
||
917 | |||
918 | mov dword [ebx+28],0 ; dir size is always 0 |
||
919 | mov ecx,[cluster] |
||
920 | mov [ebx+26],cx ; 16 bits low of cluster |
||
921 | mov word [NewDirEntry1+26],cx |
||
922 | shr ecx,16 |
||
923 | mov [ebx+20],cx ; 16 bits high of cluster (=0 fat16) |
||
924 | mov word [NewDirEntry1+20],cx |
||
925 | mov byte [ebx+11],0x10 ; attribute = directory |
||
926 | |||
927 | call set_current_time_for_entry |
||
928 | mov ecx,[ebx+22] |
||
929 | mov dword [NewDirEntry1+22],ecx |
||
930 | mov dword [NewDirEntry2+22],ecx |
||
931 | |||
932 | mov ebx,buffer ; save the directory name,length,cluster |
||
933 | call hd_write |
||
74 | mario79 | 934 | cmp [hd_error],0 |
935 | jne make_dir_error_1 |
||
1 | ha | 936 | |
937 | mov ecx,512/4 |
||
938 | xor eax,eax |
||
939 | mov edi,buffer |
||
940 | cld |
||
941 | rep stosd ; clear new directory cluster |
||
942 | |||
943 | mov eax,[cluster] ; new directory cluster |
||
944 | sub eax,2 |
||
945 | mov edx,[SECTORS_PER_CLUSTER] |
||
946 | imul eax,edx |
||
947 | add eax,[DATA_START] |
||
948 | mov ebx,buffer |
||
949 | add eax,edx ; start from last sector |
||
950 | |||
951 | dir_set_empty_directory: |
||
952 | dec eax ; next sector |
||
953 | cmp edx,1 ; is first directory sector? |
||
954 | jnz not_first_sector ; no. write empty sector |
||
955 | mov esi,NewDirEntry1 |
||
956 | mov edi,buffer |
||
957 | mov ecx,64/4 |
||
958 | cld |
||
959 | rep movsd ; copy 2 first directory entrys "." and ".." |
||
960 | |||
961 | not_first_sector: |
||
962 | call hd_write |
||
74 | mario79 | 963 | cmp [hd_error],0 |
964 | jne make_dir_error_1 |
||
965 | |||
1 | ha | 966 | dec edx |
967 | jnz dir_set_empty_directory |
||
968 | |||
969 | mov ecx,-1 ; remove 1 cluster from free disk space |
||
970 | call add_disk_free_space |
||
74 | mario79 | 971 | cmp [hd_error],0 |
972 | jne make_dir_error_1 |
||
1 | ha | 973 | |
974 | popad |
||
975 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 976 | cmp [hd_error],0 |
977 | jne make_dir_error_2 |
||
1 | ha | 978 | mov [hd1_status],0 |
979 | xor eax,eax |
||
980 | ret |
||
981 | |||
982 | |||
983 | removedir: |
||
984 | ;----------------------------------------------------- |
||
985 | ; input : eax = file/directory name |
||
986 | ; edx = path |
||
987 | ; output : eax = 0 - ok |
||
988 | ; 3 - unknown FS |
||
989 | ; 5 - file not found |
||
990 | ; 10 - access denied |
||
991 | ;----------------------------------------------------- |
||
992 | cmp [fat_type],0 |
||
993 | jnz remove_dir_fat_ok |
||
994 | mov eax,ERROR_UNKNOWN_FS |
||
995 | ret |
||
996 | |||
997 | remove_dir_fat_ok: |
||
998 | ; call reserve_hd1 |
||
999 | |||
1000 | push edi |
||
1001 | mov edi,1 ; allow directory remove |
||
1002 | call file_delete |
||
74 | mario79 | 1003 | cmp [hd_error],0 |
1004 | jne @f |
||
1005 | |||
1 | ha | 1006 | pop edi |
1007 | |||
1008 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 1009 | @@: |
1 | ha | 1010 | mov [hd1_status],0 |
1011 | ret |
||
74 | mario79 | 1012 | |
1 | ha | 1013 | |
1014 | add_disk_free_space: |
||
1015 | ;----------------------------------------------------- |
||
1016 | ; input : ecx = cluster count |
||
1017 | ; Note : negative = remove clusters from free space |
||
1018 | ; positive = add clusters to free space |
||
1019 | ;----------------------------------------------------- |
||
1020 | test ecx,ecx ; no change |
||
1021 | je add_dfs_no |
||
1022 | cmp [fat_type],32 ; free disk space only used by fat32 |
||
1023 | jne add_dfs_no |
||
1024 | |||
1025 | push eax ebx |
||
1026 | mov eax,[ADR_FSINFO] |
||
1027 | mov ebx,buffer |
||
1028 | call hd_read |
||
74 | mario79 | 1029 | cmp [hd_error],0 |
1030 | jne add_not_fs |
||
1031 | |||
1 | ha | 1032 | cmp dword [ebx+0x1fc],0xaa550000 ; check sector id |
1033 | jne add_not_fs |
||
1034 | |||
1035 | add [ebx+0x1e8],ecx |
||
1036 | call hd_write |
||
74 | mario79 | 1037 | cmp [hd_error],0 |
1038 | jne add_not_fs |
||
1 | ha | 1039 | |
1040 | add_not_fs: |
||
1041 | pop ebx eax |
||
1042 | |||
1043 | add_dfs_no: |
||
1044 | ret |
||
1045 | |||
1046 | |||
1047 | file_append: |
||
1048 | ;----------------------------------------------------- |
||
1049 | ; input : eax = file name |
||
1050 | ; edx = path |
||
1051 | ; ecx = pointer to buffer |
||
1052 | ; ebx = bytes to write (0 = truncate file) |
||
1053 | ; esi = start position (-1 = end of file) |
||
1054 | ; output : eax = 0 - ok |
||
1055 | ; 3 - unknown FS |
||
1056 | ; 5 - file not found |
||
1057 | ; 6 - end of file |
||
1058 | ; 8 - disk full |
||
1059 | ; 9 - fat table corrupted |
||
1060 | ; 10 - access denied |
||
1061 | ; ebx = bytes written |
||
1062 | ;----------------------------------------------------- |
||
1063 | cmp [fat_type],0 |
||
1064 | jnz append_fat_ok |
||
1065 | mov eax,ERROR_UNKNOWN_FS |
||
1066 | ret |
||
1067 | |||
1068 | append_fat_ok: |
||
1069 | ; call reserve_hd1 |
||
1070 | |||
1071 | pushad |
||
1072 | |||
1073 | mov ebx,edx |
||
1074 | call get_cluster_of_a_path |
||
1075 | jc append_not_found |
||
1076 | |||
1077 | mov ebx,PUSHAD_EAX ; file name |
||
1078 | call analyze_directory |
||
1079 | jc append_not_found |
||
1080 | |||
1081 | mov [sector_tmp],eax |
||
1082 | mov [entry_pos],ebx |
||
1083 | |||
1084 | test byte [ebx+11],0x10 ; is it directory? |
||
1085 | jnz append_access ; yes |
||
1086 | |||
1087 | mov ecx,[ebx+28] ; file size |
||
1088 | mov edi,PUSHAD_ESI ; write position |
||
1089 | cmp edi,-1 ; -1 = eof |
||
1090 | jnz append_inside_file |
||
1091 | mov edi,ecx ; file size |
||
1092 | |||
1093 | append_inside_file: |
||
1094 | cmp edi,ecx ; start above old file size? |
||
1095 | ja append_eof ; yes |
||
1096 | |||
1097 | mov [old_filesize],ecx |
||
1098 | mov [new_filepos],edi |
||
1099 | |||
1100 | mov ecx,PUSHAD_EBX ; bytes to write |
||
1101 | test ecx,ecx ; truncate? |
||
1102 | jz append_truncate ; yes |
||
1103 | |||
1104 | mov [bytes2write],ecx ; bytes to write |
||
1105 | mov esi,PUSHAD_ECX ; pointer to buffer |
||
1106 | mov eax,[ebx+20-2] ; FAT entry |
||
1107 | mov ax,[ebx+26] |
||
1108 | and eax,[fatMASK] |
||
1109 | jnz append_find_pos ; first cluster <> 0 |
||
1110 | |||
1111 | mov eax,2 |
||
1112 | call get_free_FAT |
||
1113 | jc append_disk_full |
||
1114 | mov ecx,eax ; set files first cluster |
||
1115 | mov [ebx+26],cx ; 16 bits low of cluster |
||
1116 | shr ecx,16 |
||
1117 | mov [ebx+20],cx ; 16 bits high of cluster (=0 fat16) |
||
1118 | mov edx,[fatEND] ; new end for cluster chain |
||
1119 | call set_FAT |
||
74 | mario79 | 1120 | cmp [hd_error],0 |
1121 | jne append_access |
||
1 | ha | 1122 | |
1123 | push eax ; save first cluster |
||
1124 | mov eax,[sector_tmp] |
||
1125 | mov ebx,buffer |
||
1126 | call hd_write ; write new file entry back to disk |
||
74 | mario79 | 1127 | cmp [hd_error],0 |
1128 | jne append_access_1 |
||
1129 | |||
1 | ha | 1130 | pop eax |
1131 | |||
1132 | append_remove_free: |
||
1133 | mov ecx,-1 ; remove 1 cluster from free disk space |
||
1134 | call add_disk_free_space ; Note: uses buffer |
||
74 | mario79 | 1135 | cmp [hd_error],0 |
1136 | jne append_access |
||
1 | ha | 1137 | |
1138 | append_found_cluster: |
||
1139 | mov [cluster],eax |
||
1140 | sub eax,2 |
||
1141 | mov ecx,[SECTORS_PER_CLUSTER] |
||
1142 | imul eax,ecx |
||
1143 | add eax,[DATA_START] |
||
1144 | xor edi,edi |
||
1145 | |||
1146 | append_new_sector: |
||
74 | mario79 | 1147 | cmp [hd_error],0 |
1148 | jne append_access |
||
1 | ha | 1149 | push ecx |
1150 | mov ecx,[bytes2write] ; bytes left in buffer |
||
1151 | mov ebx,512 |
||
1152 | sub ebx,edi ; bytes left in sector |
||
1153 | cmp ecx,ebx |
||
1154 | jb append_bytes_ok |
||
1155 | mov ecx,ebx |
||
1156 | |||
1157 | append_bytes_ok: |
||
1158 | cmp ecx,512 ; overwrite full sector? |
||
1159 | jz append_full_sector ; yes |
||
1160 | mov ebx,buffer ; overwrite part of sector |
||
1161 | call hd_read ; read old sector |
||
74 | mario79 | 1162 | cmp [hd_error],0 |
1163 | jne append_access_1 |
||
1 | ha | 1164 | |
1165 | append_full_sector: |
||
1166 | sub [bytes2write],ecx |
||
1167 | add [new_filepos],ecx |
||
1168 | add edi,buffer |
||
1169 | cld |
||
1170 | rep movsb |
||
1171 | pop ecx |
||
1172 | |||
1173 | mov ebx,buffer |
||
1174 | call hd_write |
||
74 | mario79 | 1175 | cmp [hd_error],0 |
1176 | jne append_access |
||
1177 | |||
1 | ha | 1178 | cmp [bytes2write],0 ; is all done? |
1179 | jz append_done |
||
1180 | xor edi,edi |
||
1181 | inc eax |
||
1182 | dec ecx |
||
1183 | jnz append_new_sector |
||
1184 | |||
1185 | mov eax,[cluster] |
||
1186 | call get_FAT |
||
74 | mario79 | 1187 | cmp [hd_error],0 |
1188 | jne append_access |
||
1189 | |||
1 | ha | 1190 | cmp eax,2 |
1191 | jb append_fat |
||
1192 | cmp eax,[LAST_CLUSTER] |
||
1193 | jbe append_found_cluster |
||
1194 | |||
1195 | append_alloc_cluster: |
||
1196 | mov eax,2 ; ToDo: use temp array to keep track |
||
1197 | call get_free_FAT ; of last free cluster |
||
1198 | jc append_disk_full |
||
1199 | push eax ; save new cluster |
||
1200 | mov edx,[fatEND] ; new end for cluster chain |
||
1201 | call set_FAT |
||
74 | mario79 | 1202 | cmp [hd_error],0 |
1203 | jne append_access_1 |
||
1204 | |||
1 | ha | 1205 | mov edx,eax |
1206 | mov eax,[cluster] |
||
1207 | mov [f_del],1 |
||
1208 | call set_FAT ; update previous cluster |
||
74 | mario79 | 1209 | cmp [hd_error],0 |
1210 | jne append_access_1 |
||
1211 | |||
1 | ha | 1212 | mov [f_del],0 |
1213 | pop eax |
||
1214 | jmp append_remove_free |
||
1215 | |||
1216 | append_find_pos: |
||
1217 | call find_filepos |
||
1218 | mov [cluster],ebx |
||
1219 | jnc append_new_sector |
||
1220 | test edi,edi |
||
1221 | jz append_alloc_cluster |
||
1222 | |||
1223 | append_fat: |
||
1224 | mov eax,ERROR_FAT_TABLE |
||
1225 | jmp append_ret_code |
||
74 | mario79 | 1226 | |
1 | ha | 1227 | append_disk_full: |
74 | mario79 | 1228 | cmp [hd_error],0 |
1229 | jne append_access |
||
1 | ha | 1230 | mov eax,ERROR_DISK_FULL |
1231 | jmp append_ret_code |
||
1232 | |||
1233 | append_done: |
||
1234 | xor eax,eax |
||
1235 | |||
1236 | append_ret_code: |
||
1237 | mov PUSHAD_EAX,eax ; return code |
||
1238 | |||
1239 | mov eax,[sector_tmp] ; update directory entry |
||
1240 | mov ebx,buffer |
||
1241 | call hd_read |
||
74 | mario79 | 1242 | cmp [hd_error],0 |
1243 | jne append_access |
||
1244 | |||
1 | ha | 1245 | mov ebx,[entry_pos] |
1246 | mov ecx,[new_filepos] |
||
1247 | cmp ecx,[old_filesize] ; is file pos above old size? |
||
1248 | jbe append_size_ok ; no |
||
1249 | mov [ebx+28],ecx ; new file size |
||
1250 | |||
1251 | append_size_ok: |
||
1252 | call set_current_time_for_entry |
||
1253 | mov ebx,buffer |
||
1254 | call hd_write ; write new file entry back to disk |
||
74 | mario79 | 1255 | cmp [hd_error],0 |
1256 | jne append_access |
||
1 | ha | 1257 | |
1258 | sub ecx,PUSHAD_ESI ; start position |
||
1259 | mov PUSHAD_EBX,ecx ; bytes written |
||
1260 | popad |
||
1261 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 1262 | cmp [hd_error],0 |
1263 | jne append_access_2 |
||
1264 | |||
1 | ha | 1265 | mov [hd1_status],0 |
1266 | ret |
||
1267 | |||
1268 | append_eof: |
||
1269 | popad |
||
1270 | mov [hd1_status],0 |
||
1271 | xor ebx,ebx |
||
1272 | mov eax,ERROR_END_OF_FILE |
||
1273 | ret |
||
1274 | |||
1275 | append_not_found: |
||
74 | mario79 | 1276 | cmp [hd_error],0 |
1277 | jne append_access |
||
1 | ha | 1278 | popad |
1279 | mov [hd1_status],0 |
||
1280 | xor ebx,ebx |
||
1281 | mov eax,ERROR_FILE_NOT_FOUND |
||
74 | mario79 | 1282 | ret |
1283 | append_access_1: |
||
1284 | add esp,4 |
||
1 | ha | 1285 | append_access: |
1286 | popad |
||
74 | mario79 | 1287 | append_access_2: |
1 | ha | 1288 | mov [hd1_status],0 |
1289 | xor ebx,ebx |
||
1290 | mov eax,ERROR_ACCESS_DENIED |
||
1291 | ret |
||
1292 | |||
1293 | append_truncate: |
||
1294 | mov edx,[ebx+20-2] ; FAT entry |
||
1295 | mov dx,[ebx+26] |
||
1296 | and edx,[fatMASK] |
||
1297 | mov [ebx+28],edi ; set new file size |
||
1298 | test edi,edi ; 0 length file? |
||
1299 | jnz truncate_save_size ; no |
||
1300 | mov [ebx+20],di ; FAT entry = 0 |
||
1301 | mov [ebx+26],di |
||
1302 | |||
1303 | truncate_save_size: |
||
1304 | call set_current_time_for_entry |
||
1305 | mov ebx,buffer |
||
1306 | call hd_write |
||
74 | mario79 | 1307 | cmp [hd_error],0 |
1308 | jne append_access |
||
1309 | |||
1 | ha | 1310 | mov eax,edx ; first cluster |
1311 | test edi,edi ; 0 length file? |
||
1312 | jz truncate_clear_chain |
||
1313 | |||
1314 | imul esi,[SECTORS_PER_CLUSTER],512 ; esi = cluster size in bytes |
||
1315 | |||
1316 | truncate_new_cluster: |
||
1317 | cmp eax,2 ; incorrect fat chain? |
||
1318 | jb truncate_eof ; yes |
||
1319 | cmp eax,[fatRESERVED] ; is it end of file? |
||
1320 | jnb truncate_eof ; yes |
||
1321 | sub edi,esi |
||
1322 | jbe truncate_pos_found |
||
1323 | call get_FAT ; get next cluster |
||
74 | mario79 | 1324 | cmp [hd_error],0 |
1325 | jne append_access |
||
1326 | |||
1 | ha | 1327 | jmp truncate_new_cluster |
1328 | |||
1329 | truncate_pos_found: |
||
1330 | mov edx,[fatEND] ; new end for cluster chain |
||
1331 | mov [f_del],1 |
||
1332 | call set_FAT |
||
74 | mario79 | 1333 | cmp [hd_error],0 |
1334 | jne append_access |
||
1335 | |||
1 | ha | 1336 | mov [f_del],0 |
1337 | mov eax,edx ; clear rest of chain |
||
1338 | |||
1339 | truncate_clear_chain: |
||
1340 | call clear_cluster_chain |
||
74 | mario79 | 1341 | cmp [hd_error],0 |
1342 | jne append_access |
||
1 | ha | 1343 | |
1344 | truncate_eof: |
||
1345 | popad |
||
1346 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 1347 | cmp [hd_error],0 |
1348 | jne append_access_2 |
||
1349 | |||
1 | ha | 1350 | mov [hd1_status],0 |
1351 | xor ebx,ebx |
||
1352 | xor eax,eax |
||
1353 | ret |
||
1354 | |||
1355 | |||
1356 | find_filepos: |
||
1357 | ;----------------------------------------------------- |
||
1358 | ; input : eax = first cluster |
||
1359 | ; edi = bytes to skip over (start position) |
||
1360 | ; output : if CARRY=0 file position found |
||
1361 | ; if CARRY=1 end of file found |
||
1362 | ; eax = current file sector |
||
1363 | ; ebx = last cluster |
||
1364 | ; ecx = sector count in last cluster |
||
1365 | ; edi = bytes to skip over (sector position) |
||
1366 | ;----------------------------------------------------- |
||
1367 | push esi |
||
1368 | mov ecx,[SECTORS_PER_CLUSTER] |
||
1369 | imul esi,ecx,512 ; esi = cluster size in bytes |
||
1370 | mov ebx,eax |
||
1371 | |||
1372 | filepos_new_cluster: |
||
1373 | cmp eax,2 ; incorrect fat chain? |
||
1374 | jb filepos_eof ; yes |
||
1375 | cmp eax,[fatRESERVED] ; is it end of file? |
||
1376 | jnb filepos_eof ; yes |
||
1377 | |||
1378 | mov ebx,eax |
||
1379 | cmp edi,esi ; skip over full cluster? |
||
1380 | jb filepos_cluster_ok ; no |
||
1381 | |||
1382 | sub edi,esi |
||
1383 | call get_FAT ; get next cluster |
||
74 | mario79 | 1384 | cmp [hd_error],0 |
1385 | jne filepos_eof |
||
1386 | |||
1 | ha | 1387 | jmp filepos_new_cluster |
1388 | |||
1389 | filepos_cluster_ok: |
||
1390 | sub eax,2 |
||
1391 | imul eax,ecx |
||
1392 | add eax,[DATA_START] |
||
1393 | |||
1394 | filepos_new_sector: |
||
1395 | cmp edi,512 ; skip over full sector? |
||
1396 | jb filepos_sector_ok ; no |
||
1397 | sub edi,512 |
||
1398 | inc eax |
||
1399 | dec ecx |
||
1400 | jnz filepos_new_sector |
||
1401 | |||
1402 | filepos_eof: |
||
1403 | pop esi |
||
1404 | stc |
||
1405 | ret |
||
1406 | |||
1407 | filepos_sector_ok: |
||
1408 | pop esi |
||
1409 | clc |
||
1410 | ret |
||
1411 | |||
1412 | |||
1413 | file_write: |
||
1414 | ;-------------------------------------------------------------------------- |
||
1415 | ; INPUT : user-reg register-in-this meaning symbol-in-this-routine |
||
1416 | ; |
||
1417 | ; EAX EDI system call to write / |
||
1418 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
||
1419 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
||
1420 | ; ECX EBX (PAR2) file size PAR2 |
||
1421 | ; ESI EDX (PAR3) pointer to path PAR3 |
||
1422 | ; |
||
1423 | ; output : eax = 0 - ok |
||
1424 | ; 3 - unknown FS |
||
1425 | ; 5 - file not found |
||
1426 | ; 8 - disk full |
||
1427 | ; 10 - access denied |
||
1428 | ;-------------------------------------------------------------------------- |
||
1429 | cmp [fat_type],0 |
||
1430 | jnz fat_ok_for_writing |
||
1431 | mov eax,ERROR_UNKNOWN_FS |
||
1432 | ret |
||
1433 | |||
1434 | fat_ok_for_writing: |
||
1435 | ; call reserve_hd1 |
||
1436 | |||
1437 | pushad |
||
1438 | |||
1439 | xor edi,edi ; don't allow directory remove |
||
1440 | call file_delete ; try to delete the file first |
||
74 | mario79 | 1441 | cmp [hd_error],0 |
1442 | jne exit_write_access_1 |
||
1443 | |||
1 | ha | 1444 | test eax,eax |
1445 | jz old_deleted ; deleted ok |
||
1446 | cmp eax,ERROR_FILE_NOT_FOUND |
||
1447 | jnz exit_write_access ; it exist but can't delete |
||
1448 | |||
1449 | old_deleted: |
||
1450 | mov ebx,PUSHAD_EDX |
||
1451 | call get_cluster_of_a_path |
||
1452 | jnc found_directory_for_writing |
||
74 | mario79 | 1453 | cmp [hd_error],0 |
1454 | jne exit_write_access |
||
1 | ha | 1455 | |
1456 | exit_writing_with_error: |
||
1457 | popad |
||
1458 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 1459 | cmp [hd_error],0 |
1460 | jne exit_write_access_2 |
||
1461 | |||
1 | ha | 1462 | mov [hd1_status],0 |
1463 | mov eax,ERROR_FILE_NOT_FOUND |
||
1464 | ret |
||
1465 | |||
1466 | exit_writing_disk_full_clear: |
||
74 | mario79 | 1467 | cmp [hd_error],0 |
1468 | jne exit_write_access_1 |
||
1 | ha | 1469 | mov eax,[sector_tmp] |
1470 | mov ebx,buffer |
||
1471 | call hd_read ; read directory sector |
||
74 | mario79 | 1472 | cmp [hd_error],0 |
1473 | jne exit_write_access_1 |
||
1474 | |||
1 | ha | 1475 | mov edx,[entry_pos] |
1476 | mov byte [edx],0xe5 ; mark as deleted |
||
1477 | call hd_write |
||
74 | mario79 | 1478 | cmp [hd_error],0 |
1479 | jne exit_write_access_1 |
||
1480 | |||
1 | ha | 1481 | mov eax,[edx+20-2] ; FAT entry |
1482 | mov ax,[edx+26] |
||
1483 | and eax,[fatMASK] |
||
1484 | call clear_cluster_chain |
||
1485 | |||
1486 | exit_writing_disk_full: |
||
74 | mario79 | 1487 | cmp [hd_error],0 |
1488 | jne exit_write_access_1 |
||
1 | ha | 1489 | popad |
1490 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 1491 | cmp [hd_error],0 |
1492 | jne exit_write_access_2 |
||
1 | ha | 1493 | mov [hd1_status],0 |
1494 | mov eax,ERROR_DISK_FULL |
||
1495 | ret |
||
1496 | |||
1497 | exit_write_access: |
||
1498 | popad |
||
1499 | call update_disk ; write all of cache and fat to hd |
||
1500 | mov [hd1_status],0 |
||
1501 | mov eax,ERROR_ACCESS_DENIED |
||
1502 | ret |
||
1503 | |||
74 | mario79 | 1504 | exit_write_access_1: |
1505 | popad |
||
1506 | exit_write_access_2: |
||
1507 | mov [hd1_status],0 |
||
1508 | mov eax,ERROR_ACCESS_DENIED |
||
1509 | ret |
||
1510 | |||
1 | ha | 1511 | found_directory_for_writing: |
1512 | call analyze_directory_to_write |
||
1513 | jc exit_writing_disk_full |
||
1514 | |||
1515 | mov [sector_tmp],eax |
||
1516 | mov [entry_pos],ebx |
||
1517 | push eax ; save directory sector |
||
1518 | mov eax,2 |
||
1519 | call get_free_FAT |
||
1520 | mov [cluster],eax ; first free cluster |
||
1521 | pop eax |
||
1522 | jc exit_writing_disk_full |
||
1523 | |||
1524 | mov esi,PUSHAD_EAX ; file name |
||
1525 | mov edi,ebx ; pointer in buffer |
||
1526 | mov ecx,11 |
||
1527 | cld |
||
1528 | rep movsb |
||
1529 | |||
1530 | mov esi,PUSHAD_EBX ; file size (bytes left) |
||
1531 | mov [ebx+28],esi ; file size |
||
1532 | mov ecx,[cluster] |
||
1533 | mov [ebx+26],cx ; 16 bits low of cluster |
||
1534 | shr ecx,16 |
||
1535 | mov [ebx+20],cx ; 16 bits high of cluster (=0 fat16) |
||
1536 | mov byte [ebx+11],0x20 ; attribute = archive |
||
1537 | |||
1538 | call set_current_time_for_entry |
||
1539 | |||
1540 | mov ebx,buffer ; save the directory name,length,cluster |
||
1541 | call hd_write |
||
74 | mario79 | 1542 | cmp [hd_error],0 |
1543 | jne exit_write_access_1 |
||
1 | ha | 1544 | |
1545 | imul edi,[SECTORS_PER_CLUSTER],512 ; edi = cluster size in bytes |
||
1546 | xor ecx,ecx ; cluster count |
||
1547 | mov ebx,PUSHAD_ECX ; ebx = buffer |
||
1548 | |||
1549 | hd_new_block_write: |
||
1550 | |||
1551 | mov eax,[cluster] ; eax = block |
||
1552 | call set_data_cluster |
||
74 | mario79 | 1553 | cmp [hd_error],0 |
1554 | jne exit_write_access_1 |
||
1 | ha | 1555 | |
1556 | sub esi,edi ; sub wrote bytes |
||
1557 | jbe file_saved_OK ; end if all done |
||
1558 | add ebx,edi ; update buffer position |
||
1559 | |||
1560 | inc eax |
||
1561 | call get_free_FAT ; next free in FAT |
||
1562 | jc exit_writing_disk_full_clear |
||
1563 | |||
1564 | mov edx,eax |
||
1565 | xchg eax,[cluster] ; get old cluster and save new cluster |
||
1566 | call set_FAT ; add it in cluster chain |
||
74 | mario79 | 1567 | cmp [hd_error],0 |
1568 | jne exit_write_access_1 |
||
1569 | |||
1 | ha | 1570 | dec ecx ; update cluster count |
1571 | jmp hd_new_block_write |
||
1572 | |||
1573 | file_saved_OK: |
||
1574 | |||
1575 | mov edx,[fatEND] ; new end for cluster chain |
||
1576 | call set_FAT |
||
74 | mario79 | 1577 | cmp [hd_error],0 |
1578 | jne exit_write_access_1 |
||
1579 | |||
1 | ha | 1580 | dec ecx ; update cluster count |
1581 | |||
1582 | call add_disk_free_space ; remove clusters from free disk space |
||
74 | mario79 | 1583 | cmp [hd_error],0 |
1584 | jne exit_write_access_1 |
||
1 | ha | 1585 | |
1586 | popad |
||
1587 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 1588 | cmp [hd_error],0 |
1589 | jne exit_write_access_2 |
||
1 | ha | 1590 | mov [hd1_status],0 |
1591 | xor eax,eax |
||
1592 | ret |
||
1593 | |||
1594 | |||
1595 | file_read: |
||
1596 | ;-------------------------------------------------------------------------- |
||
1597 | ; INPUT : user-register register-in-this meaning symbol-in-this |
||
1598 | ; |
||
1599 | ; EAX EDI system call to write / |
||
1600 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
||
1601 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
||
1602 | ; ECX EBX (PAR2) vt file blocks to read PAR2 |
||
1603 | ; ESI EDX (PAR3) pointer to path PAR3 |
||
1604 | ; EDI ESI vt first 512 block to read |
||
1605 | ; EDI if 0 - read root |
||
1606 | ; |
||
1607 | ; output : eax = 0 - ok |
||
1608 | ; 3 - unknown FS |
||
1609 | ; 5 - file not found |
||
1610 | ; 6 - end of file |
||
1611 | ; 9 - fat table corrupted |
||
74 | mario79 | 1612 | ; 10 - access denied |
1 | ha | 1613 | ; ebx = size of file/directory |
1614 | ;-------------------------------------------------------------------------- |
||
1615 | cmp [fat_type],0 |
||
1616 | jnz fat_ok_for_reading |
||
1617 | xor ebx,ebx |
||
1618 | mov eax,ERROR_UNKNOWN_FS |
||
63 | halyavin | 1619 | mov [hd1_status], ebx |
1 | ha | 1620 | ret |
1621 | |||
1622 | fat_ok_for_reading: |
||
1623 | ; call reserve_hd1 |
||
1624 | |||
1625 | pushad |
||
1626 | |||
1627 | mov ebx,edx |
||
1628 | call get_cluster_of_a_path |
||
1629 | jc file_to_read_not_found |
||
1630 | |||
1631 | test edi,edi ; read rootdir |
||
1632 | jne no_read_root |
||
1633 | |||
1634 | xor eax,eax |
||
1635 | call get_dir_size ; return rootdir size |
||
74 | mario79 | 1636 | cmp [hd_error],0 |
1637 | jne file_access_denied |
||
1638 | |||
1 | ha | 1639 | mov [file_size],eax |
1640 | mov eax,[ROOT_CLUSTER] |
||
1641 | jmp file_read_start |
||
1642 | |||
1643 | no_read_root: |
||
1644 | mov ebx,PUSHAD_EAX ; file name |
||
1645 | call analyze_directory |
||
1646 | jc file_to_read_not_found |
||
1647 | |||
1648 | mov eax,[ebx+28] ; file size |
||
1649 | test byte [ebx+11],0x10 ; is it directory? |
||
1650 | jz read_set_size ; no |
||
1651 | |||
1652 | mov eax,[ebx+20-2] ; FAT entry |
||
1653 | mov ax,[ebx+26] |
||
1654 | and eax,[fatMASK] |
||
1655 | call get_dir_size |
||
74 | mario79 | 1656 | cmp [hd_error],0 |
1657 | jne file_access_denied |
||
1 | ha | 1658 | |
1659 | read_set_size: |
||
1660 | mov [file_size],eax |
||
1661 | |||
1662 | mov eax,[ebx+20-2] ; FAT entry |
||
1663 | mov ax,[ebx+26] |
||
1664 | and eax,[fatMASK] |
||
1665 | |||
1666 | file_read_start: |
||
1667 | mov ebx,PUSHAD_ECX ; pointer to buffer |
||
1668 | mov edx,PUSHAD_EBX ; file blocks to read |
||
1669 | mov esi,PUSHAD_ESI ; first 512 block to read |
||
1670 | |||
1671 | file_read_new_cluster: |
||
1672 | call get_data_cluster |
||
1673 | jc file_read_eof ; end of file or cluster out of range |
||
1674 | |||
1675 | test edx,edx ; is all read? |
||
1676 | je file_read_OK ; yes |
||
1677 | |||
1678 | call get_FAT ; get next cluster |
||
74 | mario79 | 1679 | cmp [hd_error],0 |
1680 | jne file_access_denied |
||
1681 | |||
1 | ha | 1682 | cmp eax,[fatRESERVED] ; end of file |
1683 | jnb file_read_eof |
||
1684 | cmp eax,2 ; incorrect fat chain |
||
1685 | jnb file_read_new_cluster |
||
1686 | |||
1687 | popad |
||
1688 | mov [hd1_status],0 |
||
1689 | mov ebx,[file_size] |
||
1690 | mov eax,ERROR_FAT_TABLE |
||
1691 | ret |
||
1692 | |||
1693 | file_read_eof: |
||
74 | mario79 | 1694 | cmp [hd_error],0 |
1695 | jne file_access_denied |
||
1 | ha | 1696 | popad |
1697 | mov [hd1_status],0 |
||
1698 | mov ebx,[file_size] |
||
1699 | mov eax,ERROR_END_OF_FILE |
||
1700 | ret |
||
1701 | |||
1702 | file_read_OK: |
||
1703 | popad |
||
1704 | mov [hd1_status],0 |
||
1705 | mov ebx,[file_size] |
||
1706 | xor eax,eax |
||
1707 | ret |
||
1708 | |||
1709 | file_to_read_not_found: |
||
74 | mario79 | 1710 | cmp [hd_error],0 |
1711 | jne file_access_denied |
||
1 | ha | 1712 | popad |
1713 | mov [hd1_status],0 |
||
1714 | xor ebx,ebx |
||
1715 | mov eax,ERROR_FILE_NOT_FOUND |
||
1716 | ret |
||
1717 | |||
74 | mario79 | 1718 | file_access_denied: |
1719 | popad |
||
1720 | mov [hd1_status],0 |
||
1721 | xor ebx,ebx |
||
1722 | mov eax,ERROR_ACCESS_DENIED |
||
1723 | ret |
||
1 | ha | 1724 | |
1725 | get_dir_size: |
||
1726 | ;----------------------------------------------------- |
||
1727 | ; input : eax = first cluster (0=rootdir) |
||
1728 | ; output : eax = directory size in bytes |
||
1729 | ;----------------------------------------------------- |
||
1730 | push edx |
||
1731 | xor edx,edx ; count of directory clusters |
||
1732 | test eax,eax |
||
1733 | jnz dir_size_next |
||
1734 | |||
1735 | mov eax,[ROOT_SECTORS] |
||
1736 | shl eax,9 ; fat16 rootdir size in bytes |
||
1737 | cmp [fat_type],16 |
||
1738 | je dir_size_ret |
||
1739 | mov eax,[ROOT_CLUSTER] |
||
1740 | |||
1741 | dir_size_next: |
||
1742 | cmp eax,2 ; incorrect fat chain |
||
1743 | jb dir_size_end |
||
1744 | cmp eax,[fatRESERVED] ; end of directory |
||
1745 | ja dir_size_end |
||
1746 | call get_FAT ; get next cluster |
||
74 | mario79 | 1747 | cmp [hd_error],0 |
1748 | jne dir_size_ret |
||
1749 | |||
1 | ha | 1750 | inc edx |
1751 | jmp dir_size_next |
||
1752 | |||
1753 | dir_size_end: |
||
1754 | imul eax,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
||
1755 | imul eax,edx |
||
1756 | |||
1757 | dir_size_ret: |
||
1758 | pop edx |
||
1759 | ret |
||
1760 | |||
1761 | |||
1762 | file_delete: |
||
1763 | ;----------------------------------------------------- |
||
1764 | ; input : eax = file/directory name |
||
1765 | ; edx = path |
||
1766 | ; edi = 1 - allow directory remove else don't remove directory |
||
1767 | ; output : eax = 0 - ok |
||
1768 | ; 3 - unknown FS |
||
1769 | ; 5 - file not found |
||
1770 | ; 10 - access denied |
||
1771 | ;----------------------------------------------------- |
||
1772 | cmp [fat_type],0 |
||
1773 | jnz file_del_fat_ok |
||
1774 | mov eax,ERROR_UNKNOWN_FS |
||
1775 | ret |
||
1776 | |||
1777 | file_del_fat_ok: |
||
1778 | pushad |
||
1779 | |||
1780 | mov ebx,edx |
||
1781 | call get_cluster_of_a_path |
||
1782 | jc file_to_delete_not_found |
||
1783 | |||
1784 | mov ebx,PUSHAD_EAX ; file/directory name |
||
1785 | call analyze_directory |
||
1786 | jc file_to_delete_not_found |
||
1787 | |||
1788 | test byte [ebx+11],0x10 ; is it directory? |
||
1789 | jz delete_notdir ; no. it's file |
||
1790 | cmp edi,1 ; allow directory remove |
||
1791 | jnz delete_no_access ; no |
||
1792 | |||
1793 | push eax ; save directory sector |
||
1794 | mov eax,[ebx+20-2] ; first cluster of file |
||
1795 | mov ax,[ebx+26] ; 0 length files start cluster = 0 |
||
1796 | and eax,[fatMASK] |
||
1797 | xor ebp,ebp ; counter for directory deepnes |
||
1798 | call clear_directory |
||
1799 | pop eax |
||
1800 | jc delete_no_access |
||
1801 | |||
1802 | push ebx ; save directory pointer in buffer |
||
1803 | mov ebx,buffer |
||
1804 | call hd_read ; read directory sector |
||
74 | mario79 | 1805 | cmp [hd_error],0 |
1806 | jne delete_no_access_1 |
||
1 | ha | 1807 | pop ebx |
1808 | |||
1809 | delete_notdir: |
||
1810 | call delete_entry_name |
||
74 | mario79 | 1811 | cmp [hd_error],0 |
1812 | jne delete_no_access |
||
1813 | |||
1 | ha | 1814 | mov eax,ecx ; first cluster of file |
1815 | call clear_cluster_chain |
||
74 | mario79 | 1816 | cmp [hd_error],0 |
1817 | jne delete_no_access |
||
1818 | |||
1 | ha | 1819 | popad |
1820 | xor eax,eax |
||
1821 | ret |
||
1822 | |||
74 | mario79 | 1823 | delete_no_access_1: |
1824 | add esp,4 |
||
1 | ha | 1825 | delete_no_access: |
1826 | popad |
||
1827 | mov eax,ERROR_ACCESS_DENIED |
||
1828 | ret |
||
1829 | |||
1830 | file_to_delete_not_found: |
||
74 | mario79 | 1831 | cmp [hd_error],0 |
1832 | jne delete_no_access |
||
1 | ha | 1833 | popad |
1834 | mov eax,ERROR_FILE_NOT_FOUND |
||
1835 | ret |
||
1836 | |||
1837 | |||
1838 | clear_cluster_chain: |
||
1839 | ;----------------------------------------------------- |
||
1840 | ; input : eax = first cluster |
||
1841 | ;----------------------------------------------------- |
||
1842 | push eax ecx edx |
||
1843 | xor ecx,ecx ; cluster count |
||
1844 | mov [f_del],1 ; delete on |
||
1845 | |||
1846 | clean_new_chain: |
||
1847 | cmp eax,[LAST_CLUSTER] ; end of file |
||
1848 | ja delete_OK |
||
1849 | cmp eax,2 ; unfinished fat chain or zero length file |
||
1850 | jb delete_OK |
||
1851 | cmp eax,[ROOT_CLUSTER] ; don't remove root cluster |
||
1852 | jz delete_OK |
||
1853 | |||
1854 | xor edx,edx |
||
1855 | call set_FAT ; clear fat entry |
||
74 | mario79 | 1856 | cmp [hd_error],0 |
1857 | jne access_denied_01 |
||
1858 | |||
1 | ha | 1859 | inc ecx ; update cluster count |
1860 | mov eax,edx ; old cluster |
||
1861 | jmp clean_new_chain |
||
1862 | |||
1863 | delete_OK: |
||
1864 | call add_disk_free_space ; add clusters to free disk space |
||
74 | mario79 | 1865 | access_denied_01: |
1 | ha | 1866 | mov [f_del],0 |
1867 | pop edx ecx eax |
||
1868 | ret |
||
1869 | |||
1870 | |||
1871 | clear_directory: |
||
1872 | ;----------------------------------------------------- |
||
1873 | ; input : eax = directory cluster |
||
1874 | ; ebp = directory deepnes |
||
1875 | ; Note : use recursive call |
||
1876 | ;----------------------------------------------------- |
||
1877 | pushad |
||
1878 | inc ebp |
||
1879 | cmp ebp,64 ; if over 63 directory deep |
||
1880 | jnb clear_error ; something must be wrong |
||
1881 | |||
1882 | clear_new_cluster: |
||
1883 | cmp eax,[LAST_CLUSTER] |
||
1884 | ja clear_end |
||
1885 | cmp eax,[ROOT_CLUSTER] ; don't remove root cluster |
||
1886 | jz clear_end |
||
1887 | mov esi,eax ; esi = current directory cluster |
||
1888 | sub eax,2 |
||
1889 | jb clear_end |
||
1890 | mov ecx,[SECTORS_PER_CLUSTER] |
||
1891 | imul eax,ecx |
||
1892 | add eax,[DATA_START] |
||
1893 | |||
1894 | clear_new_sector: |
||
1895 | mov edi,eax ; edi = current directory sector |
||
1896 | mov ebx,deltree_buffer |
||
1897 | call hd_read |
||
74 | mario79 | 1898 | cmp [hd_error],0 |
1899 | jne clear_error |
||
1900 | |||
1 | ha | 1901 | mov edx,512/32 ; count of dir entrys per sector = 16 |
1902 | |||
1903 | clear_analyze: |
||
1904 | mov al,[ebx+11] ; file attribute |
||
1905 | and al,0xf |
||
1906 | cmp al,0xf |
||
1907 | je clear_long_filename |
||
1908 | |||
1909 | cmp byte [ebx],'.' ; parent or current directory |
||
1910 | je clear_next_entry |
||
1911 | cmp byte [ebx],0xe5 ; deleted |
||
1912 | je clear_next_entry |
||
1913 | cmp byte [ebx],0 ; empty |
||
1914 | je clear_write_last |
||
1915 | ;je clear_next_entry |
||
1916 | |||
1917 | mov eax,[ebx+20-2] ; first cluster of entry |
||
1918 | mov ax,[ebx+26] |
||
1919 | and eax,[fatMASK] |
||
1920 | |||
1921 | test byte [ebx+11],0x10 ; is it directory? |
||
1922 | jz clear_file ; no |
||
1923 | |||
1924 | push eax ebx |
||
1925 | mov eax,edi |
||
1926 | mov ebx,deltree_buffer ; save buffer over recursive call |
||
1927 | call hd_write ; write directory sector to disk |
||
74 | mario79 | 1928 | cmp [hd_error],0 |
1929 | jne clear_error |
||
1930 | |||
1 | ha | 1931 | pop ebx eax |
1932 | |||
1933 | call clear_directory ; recursive call !!! |
||
1934 | jc clear_error ; exit if error found |
||
1935 | |||
1936 | push eax ebx |
||
1937 | mov eax,edi |
||
1938 | mov ebx,deltree_buffer |
||
1939 | call hd_read ; read directory sector again |
||
74 | mario79 | 1940 | cmp [hd_error],0 |
1941 | jne clear_error_1 |
||
1942 | |||
1 | ha | 1943 | pop ebx eax |
1944 | |||
1945 | clear_file: |
||
1946 | call clear_cluster_chain |
||
74 | mario79 | 1947 | cmp [hd_error],0 |
1948 | jne clear_error |
||
1 | ha | 1949 | |
1950 | clear_long_filename: |
||
1951 | mov byte [ebx],0xe5 |
||
1952 | |||
1953 | clear_next_entry: |
||
1954 | add ebx,32 ; position of next dir entry |
||
1955 | dec edx |
||
1956 | jnz clear_analyze |
||
1957 | |||
1958 | mov eax,edi |
||
1959 | mov ebx,deltree_buffer |
||
1960 | call hd_write ; write directory sector to disk |
||
74 | mario79 | 1961 | cmp [hd_error],0 |
1962 | jne clear_error |
||
1 | ha | 1963 | |
1964 | inc eax ; next sector |
||
1965 | dec ecx |
||
1966 | jnz clear_new_sector |
||
1967 | |||
1968 | mov eax,esi |
||
1969 | call get_FAT ; get next cluster |
||
74 | mario79 | 1970 | cmp [hd_error],0 |
1971 | jne clear_error |
||
1972 | |||
1 | ha | 1973 | jmp clear_new_cluster ; clear it |
1974 | |||
1975 | clear_write_last: |
||
1976 | mov eax,edi |
||
1977 | mov ebx,deltree_buffer |
||
1978 | call hd_write ; write directory sector to disk |
||
74 | mario79 | 1979 | cmp [hd_error],0 |
1980 | jne clear_error |
||
1 | ha | 1981 | |
1982 | clear_end: |
||
1983 | popad |
||
1984 | clc |
||
1985 | ret |
||
74 | mario79 | 1986 | clear_error_1: |
1987 | add esp,8 |
||
1 | ha | 1988 | clear_error: |
1989 | popad |
||
1990 | stc |
||
1991 | ret |
||
1992 | |||
1993 | |||
1994 | delete_entry_name: |
||
1995 | ;----------------------------------------------------- |
||
1996 | ; input : eax = directory sector |
||
1997 | ; ebx = directory pointer in buffer |
||
1998 | ; longname_sec = 2 previous directory sectors |
||
1999 | ; output : ecx = first cluster |
||
2000 | ; change : eax,ebx,edx |
||
2001 | ;----------------------------------------------------- |
||
2002 | mov byte [ebx],0xe5 |
||
2003 | mov ecx,[ebx+20-2] ; first cluster of file |
||
2004 | mov cx,[ebx+26] ; 0 length files start cluster = 0 |
||
2005 | and ecx,[fatMASK] |
||
2006 | |||
2007 | delete_empty: |
||
2008 | sub ebx,32 |
||
2009 | cmp ebx,buffer |
||
2010 | jnb delete_test_long |
||
2011 | |||
2012 | mov ebx,buffer |
||
2013 | call hd_write ; write directory sector back |
||
74 | mario79 | 2014 | cmp [hd_error],0 |
2015 | jne delete_name_end |
||
2016 | |||
1 | ha | 2017 | xor eax,eax |
2018 | xchg eax,[longname_sec2] |
||
2019 | xchg eax,[longname_sec1] |
||
2020 | test eax,eax ; is there previous directory sector? |
||
2021 | jz delete_name_end ; no |
||
2022 | |||
2023 | mov ebx,buffer |
||
2024 | call hd_read ; read previous sector |
||
74 | mario79 | 2025 | cmp [hd_error],0 |
2026 | jne delete_name_end |
||
2027 | |||
1 | ha | 2028 | mov ebx,buffer+0x1e0 ; start from last entry |
2029 | |||
2030 | delete_test_long: |
||
2031 | mov dh,[ebx+11] ; file attribute |
||
2032 | and dh,0xf |
||
2033 | cmp dh,0xf |
||
2034 | jne delete_write_buffer |
||
2035 | |||
2036 | cmp byte [ebx],0x40 ; end of long dir entry? |
||
2037 | mov byte [ebx],0xe5 |
||
2038 | jb delete_empty |
||
2039 | |||
2040 | delete_write_buffer: |
||
2041 | mov ebx,buffer |
||
2042 | call hd_write ; write directory sector back |
||
2043 | |||
2044 | delete_name_end: |
||
2045 | ret |
||
2046 | |||
2047 | |||
2048 | rename: |
||
2049 | ;----------------------------------------------------------- |
||
2050 | ; input : eax = source directory name |
||
2051 | ; edx = source path |
||
2052 | ; ebx = dest directory name |
||
2053 | ; edi = dest path |
||
2054 | ; output : eax = 0 - ok |
||
2055 | ; 3 - unknown FS |
||
2056 | ; 5 - file not found |
||
2057 | ; 8 - disk full |
||
2058 | ; 10 - access denied |
||
2059 | ;----------------------------------------------------------- |
||
2060 | cmp [fat_type],0 |
||
2061 | jnz fat_ok_for_rename |
||
2062 | mov eax,ERROR_UNKNOWN_FS |
||
2063 | ret |
||
2064 | |||
2065 | fat_ok_for_rename: |
||
2066 | ; call reserve_hd1 |
||
2067 | |||
2068 | pushad |
||
2069 | |||
2070 | mov ebx,edx ; source path |
||
2071 | call get_cluster_of_a_path |
||
2072 | jc rename_entry_not_found |
||
2073 | |||
2074 | mov ebx,PUSHAD_EAX ; source directory name |
||
2075 | call analyze_directory |
||
2076 | jc rename_entry_not_found |
||
2077 | |||
2078 | mov [sector_tmp],eax ; save source sector |
||
2079 | mov [entry_pos],ebx |
||
2080 | mov esi,ebx |
||
2081 | mov edi,dir_entry |
||
2082 | mov ecx,32/4 |
||
2083 | cld |
||
2084 | rep movsd ; save entry |
||
2085 | |||
2086 | mov ebx,PUSHAD_EDI ; dest path |
||
2087 | call get_cluster_of_a_path |
||
2088 | jc rename_entry_not_found |
||
2089 | |||
2090 | mov edx,eax ; save dest directory cluster |
||
2091 | mov ebx,PUSHAD_EBX ; dest directory name |
||
2092 | push [longname_sec1] |
||
2093 | push [longname_sec2] |
||
2094 | call analyze_directory ; check if entry already exist |
||
74 | mario79 | 2095 | cmp [hd_error],0 |
2096 | jne rename_entry_already_exist_1 |
||
2097 | |||
1 | ha | 2098 | pop [longname_sec2] |
2099 | pop [longname_sec1] |
||
2100 | jnc rename_entry_already_exist |
||
2101 | |||
2102 | mov eax,edx |
||
2103 | call analyze_directory_to_write |
||
2104 | jc rename_disk_full |
||
2105 | |||
2106 | mov esi,dir_entry |
||
2107 | mov edi,ebx |
||
2108 | mov ecx,32/4 |
||
2109 | cld |
||
2110 | rep movsd ; copy entry |
||
2111 | mov esi,PUSHAD_EBX ; dest directory name |
||
2112 | mov edi,ebx |
||
2113 | mov ecx,11 |
||
2114 | rep movsb ; copy name |
||
2115 | |||
2116 | mov ebx,buffer ; save the directory name,length,cluster |
||
2117 | call hd_write |
||
2118 | |||
2119 | test byte [dir_entry+11],0x10 ; is it directory? |
||
2120 | jz rename_not_dir ; no |
||
2121 | mov eax,[dir_entry+20-2] ; FAT entry |
||
2122 | mov ax,[dir_entry+26] |
||
2123 | and eax,[fatMASK] |
||
2124 | call change_2dot_cluster |
||
74 | mario79 | 2125 | cmp [hd_error],0 |
2126 | jne rename_entry_already_exist |
||
1 | ha | 2127 | |
2128 | rename_not_dir: |
||
74 | mario79 | 2129 | cmp [hd_error],0 |
2130 | jne rename_entry_already_exist |
||
1 | ha | 2131 | mov eax,[sector_tmp] |
2132 | mov ebx,buffer |
||
2133 | call hd_read ; read source directory sector |
||
74 | mario79 | 2134 | cmp [hd_error],0 |
2135 | jne rename_entry_already_exist |
||
1 | ha | 2136 | |
2137 | mov ebx,[entry_pos] |
||
2138 | call delete_entry_name |
||
74 | mario79 | 2139 | cmp [hd_error],0 |
2140 | jne rename_entry_already_exist |
||
1 | ha | 2141 | |
2142 | popad |
||
2143 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 2144 | cmp [hd_error],0 |
2145 | jne rename_entry_already_exist_2 |
||
1 | ha | 2146 | mov [hd1_status],0 |
2147 | xor eax,eax |
||
2148 | ret |
||
2149 | |||
2150 | rename_entry_not_found: |
||
74 | mario79 | 2151 | cmp [hd_error],0 |
2152 | jne rename_entry_already_exist |
||
1 | ha | 2153 | popad |
2154 | mov [hd1_status],0 |
||
2155 | mov eax,ERROR_FILE_NOT_FOUND |
||
2156 | ret |
||
2157 | |||
74 | mario79 | 2158 | rename_entry_already_exist_1: |
2159 | add esp,8 |
||
1 | ha | 2160 | rename_entry_already_exist: |
2161 | popad |
||
74 | mario79 | 2162 | rename_entry_already_exist_2: |
1 | ha | 2163 | mov [hd1_status],0 |
2164 | mov eax,ERROR_ACCESS_DENIED |
||
2165 | ret |
||
2166 | |||
2167 | rename_disk_full: |
||
74 | mario79 | 2168 | cmp [hd_error],0 |
2169 | jne rename_entry_already_exist |
||
1 | ha | 2170 | popad |
2171 | mov [hd1_status],0 |
||
2172 | mov eax,ERROR_DISK_FULL |
||
2173 | ret |
||
2174 | |||
2175 | |||
2176 | change_2dot_cluster: |
||
2177 | ;----------------------------------------------------------- |
||
2178 | ; input : eax = directory cluster |
||
2179 | ; edx = value to save |
||
2180 | ; change : eax,ebx,edx |
||
2181 | ;----------------------------------------------------------- |
||
2182 | cmp eax,[LAST_CLUSTER] |
||
2183 | ja not_2dot ; too big cluster number, something is wrong |
||
2184 | sub eax,2 |
||
2185 | jb not_2dot |
||
2186 | |||
2187 | imul eax,[SECTORS_PER_CLUSTER] |
||
2188 | add eax,[DATA_START] |
||
2189 | mov ebx,buffer |
||
2190 | call hd_read |
||
74 | mario79 | 2191 | cmp [hd_error],0 |
2192 | jne not_2dot |
||
1 | ha | 2193 | |
2194 | cmp dword [ebx+32],'.. ' |
||
2195 | jnz not_2dot |
||
2196 | |||
2197 | cmp edx,[ROOT_CLUSTER] ; is rootdir cluster? |
||
2198 | jne not_2dot_root |
||
2199 | xor edx,edx ; yes. set it zero |
||
2200 | |||
2201 | not_2dot_root: |
||
2202 | mov [ebx+32+26],dx ; 16 bits low of cluster |
||
2203 | shr edx,16 |
||
2204 | mov [ebx+32+20],dx ; 16 bits high of cluster (=0 fat16) |
||
2205 | call hd_write |
||
2206 | |||
2207 | not_2dot: |
||
2208 | ret |
||
2209 | |||
2210 | |||
2211 | get_filesize: |
||
2212 | ;----------------------------------------------------------- |
||
2213 | ; input : eax = file name |
||
2214 | ; edx = path |
||
2215 | ; edi = if 0 - read rootdir else normal dir/file size |
||
2216 | ; output : eax = 0 - ok |
||
2217 | ; 3 - unknown FS |
||
2218 | ; 5 - file not found |
||
74 | mario79 | 2219 | ; 10 - access denied |
1 | ha | 2220 | ; ebx = file size |
2221 | ;----------------------------------------------------------- |
||
2222 | cmp [fat_type],0 |
||
2223 | jnz get_filesize_fat_ok |
||
2224 | xor ebx,ebx |
||
2225 | mov eax,ERROR_UNKNOWN_FS |
||
2226 | ret |
||
2227 | |||
2228 | get_filesize_fat_ok: |
||
2229 | ; call reserve_hd1 |
||
2230 | |||
2231 | pushad |
||
2232 | xor eax,eax |
||
2233 | test edi,edi ; is read rootdir? |
||
2234 | je get_filesize_dirsize ; yes |
||
2235 | |||
2236 | get_filesize_no_root: |
||
2237 | mov ebx,edx |
||
2238 | call get_cluster_of_a_path |
||
2239 | jc get_filesize_not_found |
||
2240 | |||
2241 | mov ebx,PUSHAD_EAX ; file name |
||
2242 | call analyze_directory |
||
2243 | jc get_filesize_not_found |
||
2244 | |||
2245 | mov eax,[ebx+28] ; file size |
||
2246 | test byte [ebx+11],0x10 ; is it directory? |
||
2247 | jz get_filesize_set_size ; no |
||
2248 | |||
2249 | mov eax,[ebx+20-2] ; FAT entry |
||
2250 | mov ax,[ebx+26] |
||
2251 | and eax,[fatMASK] |
||
2252 | |||
2253 | get_filesize_dirsize: |
||
2254 | call get_dir_size |
||
74 | mario79 | 2255 | cmp [hd_error],0 |
2256 | jne get_filesize_access_denied |
||
1 | ha | 2257 | |
2258 | get_filesize_set_size: |
||
2259 | mov PUSHAD_EBX,eax |
||
2260 | popad |
||
2261 | mov [hd1_status],0 |
||
2262 | xor eax,eax |
||
2263 | ret |
||
2264 | |||
2265 | get_filesize_not_found: |
||
74 | mario79 | 2266 | cmp [hd_error],0 |
2267 | jne get_filesize_access_denied |
||
1 | ha | 2268 | popad |
2269 | mov [hd1_status],0 |
||
2270 | xor ebx,ebx |
||
2271 | mov eax,ERROR_FILE_NOT_FOUND |
||
2272 | ret |
||
2273 | |||
74 | mario79 | 2274 | get_filesize_access_denied: |
2275 | popad |
||
2276 | mov [hd1_status],0 |
||
2277 | xor ebx,ebx |
||
2278 | mov eax,ERROR_ACCESS_DENIED |
||
2279 | ret |
||
1 | ha | 2280 | |
2281 | get_fileattr: |
||
2282 | ;----------------------------------------------------------- |
||
2283 | ; input : eax = file name |
||
2284 | ; edx = path |
||
2285 | ; output : eax = 0 - ok |
||
2286 | ; 3 - unknown FS |
||
2287 | ; 5 - file not found |
||
74 | mario79 | 2288 | ; 10 - access denied |
1 | ha | 2289 | ; ebx = file attribute |
2290 | ;----------------------------------------------------------- |
||
2291 | cmp [fat_type],0 |
||
2292 | jnz get_fileattr_fat_ok |
||
2293 | xor ebx,ebx |
||
2294 | mov eax,ERROR_UNKNOWN_FS |
||
2295 | ret |
||
2296 | |||
2297 | get_fileattr_fat_ok: |
||
2298 | ; call reserve_hd1 |
||
2299 | |||
2300 | pushad |
||
2301 | mov ebx,edx |
||
2302 | call get_cluster_of_a_path |
||
2303 | jc get_fileattr_not_found |
||
2304 | |||
2305 | mov ebx,PUSHAD_EAX ; file name |
||
2306 | call analyze_directory |
||
2307 | jc get_fileattr_not_found |
||
2308 | |||
2309 | movzx eax,byte [ebx+11] ; file attribute |
||
2310 | mov PUSHAD_EBX,eax |
||
2311 | popad |
||
2312 | mov [hd1_status],0 |
||
2313 | xor eax,eax |
||
2314 | ret |
||
2315 | |||
2316 | get_fileattr_not_found: |
||
74 | mario79 | 2317 | cmp [hd_error],0 |
2318 | jne get_fileattr_access_denied |
||
1 | ha | 2319 | popad |
2320 | mov [hd1_status],0 |
||
2321 | xor ebx,ebx |
||
2322 | mov eax,ERROR_FILE_NOT_FOUND |
||
2323 | ret |
||
2324 | |||
74 | mario79 | 2325 | get_fileattr_access_denied: |
2326 | popad |
||
2327 | mov [hd1_status],0 |
||
2328 | xor ebx,ebx |
||
2329 | mov eax,ERROR_ACCESS_DENIED |
||
2330 | ret |
||
1 | ha | 2331 | |
2332 | get_filedate: |
||
2333 | ;----------------------------------------------------------- |
||
2334 | ; input : eax = file name |
||
2335 | ; edx = path |
||
2336 | ; output : eax = 0 - ok |
||
2337 | ; 3 - unknown FS |
||
2338 | ; 5 - file not found |
||
74 | mario79 | 2339 | ; 10 - access denied |
1 | ha | 2340 | ; ebx = file date/time |
2341 | ; bits 31..25 = year-1980 |
||
2342 | ; bits 24..21 = month |
||
2343 | ; bits 20..16 = day |
||
2344 | ; bits 15..11 = hour |
||
2345 | ; bits 10..5 = minute |
||
2346 | ; bits 4..0 = second/2 |
||
2347 | ;----------------------------------------------------------- |
||
2348 | cmp [fat_type],0 |
||
2349 | jnz get_filedate_fat_ok |
||
2350 | xor ebx,ebx |
||
2351 | mov eax,ERROR_UNKNOWN_FS |
||
2352 | ret |
||
2353 | |||
2354 | get_filedate_fat_ok: |
||
2355 | ; call reserve_hd1 |
||
2356 | |||
2357 | pushad |
||
2358 | mov ebx,edx |
||
2359 | call get_cluster_of_a_path |
||
2360 | jc get_filedate_not_found |
||
2361 | |||
2362 | mov ebx,PUSHAD_EAX ; file name |
||
2363 | call analyze_directory |
||
2364 | jc get_filedate_not_found |
||
2365 | |||
2366 | mov eax,[ebx+22] ; file date/time |
||
2367 | mov PUSHAD_EBX,eax |
||
2368 | popad |
||
2369 | mov [hd1_status],0 |
||
2370 | xor eax,eax |
||
2371 | ret |
||
2372 | |||
2373 | get_filedate_not_found: |
||
74 | mario79 | 2374 | cmp [hd_error],0 |
2375 | jne get_filedate_access_denied |
||
1 | ha | 2376 | popad |
2377 | mov [hd1_status],0 |
||
2378 | xor ebx,ebx |
||
2379 | mov eax,ERROR_FILE_NOT_FOUND |
||
2380 | ret |
||
2381 | |||
74 | mario79 | 2382 | get_filedate_access_denied: |
2383 | popad |
||
2384 | mov [hd1_status],0 |
||
2385 | xor ebx,ebx |
||
2386 | mov eax,ERROR_ACCESS_DENIED |
||
2387 | ret |
||
1 | ha | 2388 | |
2389 | get_hd_info: |
||
2390 | ;----------------------------------------------------------- |
||
2391 | ; output : eax = 0 - ok |
||
2392 | ; 3 - unknown FS |
||
74 | mario79 | 2393 | ; 10 - access denied |
1 | ha | 2394 | ; edx = cluster size in bytes |
2395 | ; ebx = total clusters on disk |
||
2396 | ; ecx = free clusters on disk |
||
2397 | ;----------------------------------------------------------- |
||
2398 | cmp [fat_type],0 |
||
2399 | jnz info_fat_ok |
||
2400 | xor edx,edx |
||
2401 | xor ebx,ebx |
||
2402 | xor ecx,ecx |
||
2403 | mov eax,ERROR_UNKNOWN_FS |
||
2404 | ret |
||
2405 | |||
2406 | info_fat_ok: |
||
2407 | ; call reserve_hd1 |
||
2408 | |||
2409 | xor ecx,ecx ; count of free clusters |
||
2410 | mov eax,2 |
||
2411 | mov ebx,[LAST_CLUSTER] |
||
2412 | |||
2413 | info_cluster: |
||
2414 | push eax |
||
2415 | call get_FAT ; get cluster info |
||
74 | mario79 | 2416 | cmp [hd_error],0 |
2417 | jne info_access_denied |
||
2418 | |||
1 | ha | 2419 | test eax,eax ; is it free? |
2420 | jnz info_used ; no |
||
2421 | inc ecx |
||
2422 | |||
2423 | info_used: |
||
2424 | pop eax |
||
2425 | inc eax |
||
2426 | cmp eax,ebx ; is above last cluster? |
||
2427 | jbe info_cluster ; no. test next cluster |
||
2428 | |||
2429 | dec ebx ; cluster count |
||
2430 | imul edx,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
||
2431 | mov [hd1_status],0 |
||
2432 | xor eax,eax |
||
2433 | ret |
||
2434 | |||
74 | mario79 | 2435 | info_access_denied: |
2436 | add esp,4 |
||
2437 | xor edx,edx |
||
2438 | xor ebx,ebx |
||
2439 | xor ecx,ecx |
||
2440 | mov eax,ERROR_ACCESS_DENIED |
||
2441 | ret |
||
1 | ha | 2442 | |
2443 | update_disk: |
||
2444 | ;----------------------------------------------------------- |
||
2445 | ; write changed fat and cache to disk |
||
2446 | ;----------------------------------------------------------- |
||
2447 | cmp [fat_change],0 ; is fat changed? |
||
2448 | je upd_no_change |
||
2449 | |||
2450 | call write_fat_sector |
||
74 | mario79 | 2451 | cmp [hd_error],0 |
2452 | jne update_disk_acces_denied |
||
1 | ha | 2453 | |
2454 | upd_no_change: |
||
2455 | |||
2456 | call write_cache |
||
74 | mario79 | 2457 | update_disk_acces_denied: |
1 | ha | 2458 | ret |
2459 | |||
2460 | |||
2461 | ;************************************************************************** |
||
2462 | ; |
||
2463 | ; 0x600008 - first entry in cache list |
||
2464 | ; |
||
2465 | ; +0 - lba sector |
||
2466 | ; +4 - state of cache sector |
||
2467 | ; 0 = empty |
||
2468 | ; 1 = used for read ( same as in hd ) |
||
2469 | ; 2 = used for write ( differs from hd ) |
||
2470 | ; |
||
2471 | ; +65536 - cache entries |
||
2472 | ; |
||
2473 | ;************************************************************************** |
||
2474 | |||
2475 | |||
2476 | hd_read: |
||
2477 | ;----------------------------------------------------------- |
||
2478 | ; input : eax = block to read |
||
2479 | ; ebx = destination |
||
2480 | ;----------------------------------------------------------- |
||
2481 | push ecx esi edi ; scan cache |
||
2482 | |||
2483 | mov ecx,cache_max ; entries in cache |
||
2484 | mov esi,0x600000+8 |
||
2485 | mov edi,1 |
||
2486 | |||
2487 | hdreadcache: |
||
2488 | |||
2489 | cmp dword [esi+4],0 ; empty |
||
2490 | je nohdcache |
||
2491 | |||
2492 | cmp [esi],eax ; correct sector |
||
2493 | je yeshdcache |
||
2494 | |||
2495 | nohdcache: |
||
2496 | |||
2497 | add esi,8 |
||
2498 | inc edi |
||
2499 | dec ecx |
||
2500 | jnz hdreadcache |
||
2501 | |||
2502 | call find_empty_slot ; ret in edi |
||
74 | mario79 | 2503 | cmp [hd_error],0 |
2504 | jne return_01 |
||
1 | ha | 2505 | |
2506 | push eax edx |
||
2507 | |||
74 | mario79 | 2508 | call wait_for_hd_idle |
2509 | cmp [hd_error],0 |
||
2510 | jne hd_read_error |
||
2511 | |||
1 | ha | 2512 | cli |
2513 | xor eax,eax |
||
2514 | mov edx,[hdbase] |
||
2515 | inc edx |
||
86 | diamond | 2516 | out dx,al ; ATAFeatures ॣ¨áâà "®á®¡¥®á⥩" |
1 | ha | 2517 | inc edx |
2518 | inc eax |
||
86 | diamond | 2519 | out dx,al ; ATASectorCount áç¥â稪 ᥪâ®à®¢ |
1 | ha | 2520 | inc edx |
2521 | mov eax,[esp+4] |
||
86 | diamond | 2522 | out dx,al ; ATASectorNumber ॣ¨áâà ®¬¥à ᥪâ®à |
1 | ha | 2523 | shr eax,8 |
2524 | inc edx |
||
86 | diamond | 2525 | out dx,al ; ATACylinder ®¬¥à 樫¨¤à (¬« ¤è¨© ¡ ©â) |
1 | ha | 2526 | shr eax,8 |
2527 | inc edx |
||
86 | diamond | 2528 | out dx,al ; ®¬¥à 樫¨¤à (áâ à訩 ¡ ©â) |
1 | ha | 2529 | shr eax,8 |
2530 | inc edx |
||
2531 | and al,1+2+4+8 |
||
2532 | add al,byte [hdid] |
||
2533 | add al,128+64+32 |
||
86 | diamond | 2534 | out dx,al ; ®¬¥à £®«®¢ª¨/®¬¥à ¤¨áª |
1 | ha | 2535 | inc edx |
2536 | mov al,20h |
||
86 | diamond | 2537 | out dx,al ; ATACommand ॣ¨áâà ª®¬ ¤ |
1 | ha | 2538 | sti |
2539 | |||
2540 | call wait_for_sector_buffer |
||
2541 | |||
2542 | cmp [hd_error],0 |
||
2543 | jne hd_read_error |
||
2544 | |||
2545 | cli |
||
2546 | push edi |
||
2547 | shl edi,9 |
||
2548 | add edi,0x600000+65536 |
||
2549 | mov ecx,256 |
||
2550 | mov edx,[hdbase] |
||
2551 | cld |
||
2552 | rep insw |
||
2553 | pop edi |
||
2554 | sti |
||
2555 | |||
2556 | pop edx eax |
||
2557 | blok_read_2: |
||
2558 | lea esi,[edi*8+0x600000] |
||
2559 | mov [esi],eax ; sector number |
||
2560 | mov dword [esi+4],1 ; hd read - mark as same as in hd |
||
2561 | |||
2562 | yeshdcache: |
||
2563 | |||
2564 | mov esi,edi |
||
2565 | shl esi,9 |
||
2566 | add esi,0x600000+65536 |
||
2567 | mov edi,ebx |
||
2568 | mov ecx,512/4 |
||
2569 | cld |
||
2570 | rep movsd ; move data |
||
74 | mario79 | 2571 | return_01: |
1 | ha | 2572 | pop edi esi ecx |
2573 | ret |
||
2574 | |||
2575 | |||
2576 | hd_write: |
||
2577 | ;----------------------------------------------------------- |
||
2578 | ; input : eax = block |
||
2579 | ; ebx = pointer to memory |
||
2580 | ;----------------------------------------------------------- |
||
2581 | push ecx esi edi |
||
2582 | |||
2583 | ; check if the cache already has the sector and overwrite it |
||
2584 | |||
2585 | mov ecx,cache_max |
||
2586 | mov esi,0x600000+8 |
||
2587 | mov edi,1 |
||
2588 | |||
2589 | hdwritecache: |
||
2590 | |||
2591 | cmp dword [esi+4],0 ; if cache slot is empty |
||
2592 | je not_in_cache_write |
||
2593 | |||
2594 | cmp [esi],eax ; if the slot has the sector |
||
2595 | je yes_in_cache_write |
||
2596 | |||
2597 | not_in_cache_write: |
||
2598 | |||
2599 | add esi,8 |
||
2600 | inc edi |
||
2601 | dec ecx |
||
2602 | jnz hdwritecache |
||
2603 | |||
2604 | ; sector not found in cache |
||
2605 | ; write the block to a new location |
||
2606 | |||
2607 | call find_empty_slot ; ret in edi |
||
74 | mario79 | 2608 | cmp [hd_error],0 |
2609 | jne hd_write_access_denied |
||
1 | ha | 2610 | |
2611 | lea esi,[edi*8+0x600000] |
||
2612 | mov [esi],eax ; sector number |
||
2613 | |||
2614 | yes_in_cache_write: |
||
2615 | |||
2616 | mov dword [esi+4],2 ; write - differs from hd |
||
2617 | |||
2618 | shl edi,9 |
||
2619 | add edi,0x600000+65536 |
||
2620 | mov esi,ebx |
||
2621 | mov ecx,512/4 |
||
2622 | cld |
||
2623 | rep movsd ; move data |
||
74 | mario79 | 2624 | hd_write_access_denied: |
1 | ha | 2625 | pop edi esi ecx |
2626 | ret |
||
2627 | |||
2628 | |||
2629 | write_cache: |
||
2630 | ;----------------------------------------------------------- |
||
2631 | ; write all changed sectors to disk |
||
2632 | ;----------------------------------------------------------- |
||
2633 | push eax ecx edx esi edi |
||
2634 | |||
2635 | ; write difference ( 2 ) from cache to hd |
||
2636 | |||
2637 | mov ecx,cache_max |
||
2638 | mov esi,0x600000+8 |
||
2639 | mov edi,1 |
||
2640 | |||
2641 | write_cache_more: |
||
2642 | |||
2643 | cmp dword [esi+4],2 ; if cache slot is not different |
||
2644 | jne does_not_need_writing |
||
2645 | |||
2646 | mov dword [esi+4],1 ; same as in hd |
||
2647 | mov eax,[esi] ; eax = sector to write |
||
2648 | |||
2649 | cmp eax,[PARTITION_START] |
||
2650 | jb danger |
||
2651 | cmp eax,[PARTITION_END] |
||
2652 | ja danger |
||
2653 | |||
2654 | call wait_for_hd_idle |
||
74 | mario79 | 2655 | cmp [hd_error],0 |
2656 | jne hd_write_error |
||
1 | ha | 2657 | |
2658 | cli |
||
2659 | xor eax,eax |
||
2660 | mov edx,[hdbase] |
||
2661 | inc edx |
||
2662 | out dx,al |
||
2663 | inc edx |
||
2664 | inc eax |
||
2665 | out dx,al |
||
2666 | inc edx |
||
2667 | mov eax,[esi] ; eax = sector to write |
||
2668 | out dx,al |
||
2669 | shr eax,8 |
||
2670 | inc edx |
||
2671 | out dx,al |
||
2672 | shr eax,8 |
||
2673 | inc edx |
||
2674 | out dx,al |
||
2675 | shr eax,8 |
||
2676 | inc edx |
||
2677 | and al,1+2+4+8 |
||
2678 | add al,byte [hdid] |
||
2679 | add al,128+64+32 |
||
2680 | out dx,al |
||
2681 | inc edx |
||
2682 | mov al,30h |
||
2683 | out dx,al |
||
2684 | sti |
||
2685 | |||
2686 | call wait_for_sector_buffer |
||
2687 | |||
2688 | cmp [hd_error],0 |
||
2689 | jne hd_write_error |
||
2690 | |||
2691 | push ecx esi |
||
2692 | |||
2693 | cli |
||
2694 | mov esi,edi |
||
2695 | shl esi,9 |
||
2696 | add esi,0x600000+65536 ; esi = from memory position |
||
2697 | mov ecx,256 |
||
2698 | mov edx,[hdbase] |
||
2699 | cld |
||
2700 | rep outsw |
||
2701 | sti |
||
2702 | |||
2703 | pop esi ecx |
||
2704 | |||
2705 | danger: |
||
2706 | does_not_need_writing: |
||
2707 | |||
2708 | add esi,8 |
||
2709 | inc edi |
||
2710 | dec ecx |
||
2711 | jnz write_cache_more |
||
74 | mario79 | 2712 | return_02: |
1 | ha | 2713 | pop edi esi edx ecx eax |
2714 | ret |
||
2715 | |||
2716 | |||
2717 | find_empty_slot: |
||
2718 | ;----------------------------------------------------------- |
||
2719 | ; find empty or read slot, flush cache if next 10% is used by write |
||
2720 | ; output : edi = cache slot |
||
2721 | ;----------------------------------------------------------- |
||
2722 | push ecx esi |
||
2723 | |||
2724 | search_again: |
||
2725 | |||
2726 | mov ecx,cache_max*10/100 |
||
2727 | mov edi,[cache_search_start] |
||
2728 | |||
2729 | search_for_empty: |
||
2730 | |||
2731 | inc edi |
||
2732 | cmp edi,cache_max |
||
2733 | jbe inside_cache |
||
2734 | mov edi,1 |
||
2735 | |||
2736 | inside_cache: |
||
2737 | |||
2738 | cmp dword [edi*8+0x600000+4],2 ; get cache slot info |
||
2739 | jb found_slot ; it's empty or read |
||
2740 | dec ecx |
||
2741 | jnz search_for_empty |
||
2742 | |||
2743 | call write_cache ; no empty slots found, write all |
||
74 | mario79 | 2744 | cmp [hd_error],0 |
2745 | jne found_slot_access_denied |
||
2746 | |||
1 | ha | 2747 | jmp search_again ; and start again |
2748 | |||
2749 | found_slot: |
||
2750 | |||
2751 | mov [cache_search_start],edi |
||
74 | mario79 | 2752 | found_slot_access_denied: |
1 | ha | 2753 | pop esi ecx |
2754 | ret |
||
2755 | |||
2756 | |||
2757 | save_hd_wait_timeout: |
||
2758 | |||
2759 | push eax |
||
2760 | mov eax,[timer_ticks];[0xfdf0] |
||
2761 | add eax,300 ; 3 sec timeout |
||
2762 | mov [hd_wait_timeout],eax |
||
2763 | pop eax |
||
2764 | ret |
||
2765 | |||
2766 | |||
2767 | check_hd_wait_timeout: |
||
2768 | |||
2769 | push eax |
||
2770 | mov eax,[hd_wait_timeout] |
||
2771 | cmp [timer_ticks], eax ;[0xfdf0],eax |
||
2772 | jg hd_timeout_error |
||
2773 | pop eax |
||
74 | mario79 | 2774 | mov [hd_error],0 |
1 | ha | 2775 | ret |
2776 | |||
2777 | iglobal |
||
2778 | hd_timeout_str db 'K : FS - HD timeout',13,10,0 |
||
2779 | hd_read_str db 'K : FS - HD read error',13,10,0 |
||
2780 | hd_write_str db 'K : FS - HD write error',13,10,0 |
||
74 | mario79 | 2781 | hd_lba_str db 'K : FS - HD LBA error',13,10,0 |
1 | ha | 2782 | endg |
2783 | |||
2784 | hd_timeout_error: |
||
2785 | |||
2786 | call clear_hd_cache |
||
2787 | call clear_application_table_status |
||
2788 | mov esi,hd_timeout_str |
||
2789 | call sys_msg_board_str |
||
74 | mario79 | 2790 | ; jmp $ |
2791 | mov [hd_error],1 |
||
2792 | pop eax |
||
2793 | ret |
||
1 | ha | 2794 | |
2795 | hd_read_error: |
||
2796 | |||
2797 | call clear_hd_cache |
||
2798 | call clear_application_table_status |
||
2799 | mov esi,hd_read_str |
||
2800 | call sys_msg_board_str |
||
74 | mario79 | 2801 | pop edx eax |
2802 | jmp return_01 |
||
2803 | ; jmp $ |
||
1 | ha | 2804 | |
2805 | hd_write_error: |
||
2806 | |||
2807 | call clear_hd_cache |
||
2808 | call clear_application_table_status |
||
2809 | mov esi,hd_write_str |
||
2810 | call sys_msg_board_str |
||
74 | mario79 | 2811 | jmp return_02 |
2812 | ; jmp $ |
||
1 | ha | 2813 | |
74 | mario79 | 2814 | hd_lba_error: |
2815 | call clear_hd_cache |
||
2816 | call clear_application_table_status |
||
2817 | mov esi,hd_lba_str |
||
2818 | call sys_msg_board_str |
||
2819 | jmp LBA_read_ret |
||
1 | ha | 2820 | |
2821 | |||
2822 | wait_for_hd_idle: |
||
2823 | |||
2824 | push eax edx |
||
2825 | |||
2826 | call save_hd_wait_timeout |
||
2827 | |||
2828 | mov edx,[hdbase] |
||
2829 | add edx,0x7 |
||
2830 | |||
2831 | wfhil1: |
||
2832 | |||
2833 | call check_hd_wait_timeout |
||
74 | mario79 | 2834 | cmp [hd_error],0 |
2835 | jne @f |
||
1 | ha | 2836 | |
2837 | in al,dx |
||
2838 | test al,128 |
||
2839 | jnz wfhil1 |
||
74 | mario79 | 2840 | |
2841 | @@: |
||
1 | ha | 2842 | |
2843 | pop edx eax |
||
2844 | ret |
||
2845 | |||
2846 | |||
74 | mario79 | 2847 | |
1 | ha | 2848 | wait_for_sector_buffer: |
2849 | |||
2850 | push eax edx |
||
2851 | |||
2852 | mov edx,[hdbase] |
||
2853 | add edx,0x7 |
||
2854 | |||
2855 | call save_hd_wait_timeout |
||
2856 | |||
2857 | hdwait_sbuf: ; wait for sector buffer to be ready |
||
2858 | |||
2859 | call check_hd_wait_timeout |
||
74 | mario79 | 2860 | cmp [hd_error],0 |
2861 | jne @f |
||
1 | ha | 2862 | |
2863 | in al,dx |
||
2864 | test al,8 |
||
2865 | jz hdwait_sbuf |
||
2866 | |||
2867 | mov [hd_error],0 |
||
2868 | |||
2869 | cmp [hd_setup],1 ; do not mark error for setup request |
||
2870 | je buf_wait_ok |
||
2871 | |||
2872 | test al,1 ; previous command ended up with an error |
||
2873 | jz buf_wait_ok |
||
74 | mario79 | 2874 | @@: |
1 | ha | 2875 | mov [hd_error],1 |
2876 | |||
2877 | buf_wait_ok: |
||
2878 | |||
2879 | pop edx eax |
||
2880 | ret |
||
2881 | |||
2882 | |||
2883 | |||
2884 | read_hd_file: |
||
2885 | ;----------------------------------------------------------------- |
||
2886 | ; |
||
2887 | ; Converting old reading function for hd-application start. |
||
2888 | ; |
||
2889 | ; IN: |
||
2890 | ; |
||
2891 | ; eax - pointer to file (0 = read only first sector of drive: eg 'label') |
||
2892 | ; ebx - file lenght |
||
2893 | ; ecx - start 512 byte block number |
||
2894 | ; edx - number of blocks to read |
||
2895 | ; esi - pointer to return/work area (atleast 20 000 bytes) |
||
2896 | ; |
||
2897 | ; For new read function |
||
2898 | ; |
||
2899 | ; EAX (PAR0) pointer to file-name |
||
2900 | ; ECX (PAR1) pointer to buffer |
||
2901 | ; EBX (PAR2) vt file blocks to read |
||
2902 | ; EDX (PAR3) pointer to path |
||
2903 | ; ESI vt first 512 block to read |
||
2904 | ; EDI if 0 - return root |
||
2905 | ;-------------------------------------------------------------------------- |
||
2906 | |||
2907 | push ecx esi edi |
||
2908 | mov esi,eax |
||
2909 | mov edi,startpath |
||
2910 | mov ecx,250 |
||
2911 | cld |
||
2912 | rep movsb |
||
2913 | pop edi esi ecx |
||
2914 | |||
2915 | mov eax,startpath |
||
2916 | mov [eax+ebx-12],byte 0 |
||
2917 | |||
2918 | push eax ebx ecx edx esi |
||
2919 | |||
2920 | pop ecx ; pointer to buffer |
||
2921 | add ecx,1024 |
||
2922 | pop ebx ; number of blocks to read |
||
2923 | pop esi ; first block to read |
||
2924 | dec esi |
||
2925 | pop eax ; file length |
||
2926 | pop edx ; pointer to path |
||
2927 | |||
2928 | mov edi,12 |
||
2929 | lea eax,[eax+edx-12+1] |
||
2930 | call file_read |
||
2931 | |||
2932 | ret |
||
2933 | |||
71 | diamond | 2934 | ; \begin{diamond} |
2935 | hd_find_lfn: |
||
2936 | ; in: esi->name |
||
2937 | ; out: CF=1 - file not found |
||
86 | diamond | 2938 | ; else CF=0 and edi->direntry, eax=sector |
83 | diamond | 2939 | ; destroys eax |
2940 | push esi edi |
||
2941 | push 0 |
||
2942 | push 0 |
||
2943 | push fat16_root_first |
||
2944 | push fat16_root_next |
||
2945 | mov eax, [ROOT_CLUSTER] |
||
2946 | cmp [fat_type], 32 |
||
2947 | jz .fat32 |
||
2948 | .loop: |
||
2949 | call fat_find_lfn |
||
2950 | jc .notfound |
||
2951 | cmp byte [esi], 0 |
||
2952 | jz .found |
||
2953 | test byte [edi+11], 10h |
||
2954 | jz .notfound |
||
2955 | and dword [esp+12], 0 |
||
2956 | movzx eax, word [edi+26] ; cluster |
||
2957 | .fat32: |
||
2958 | mov [esp+8], eax |
||
2959 | mov dword [esp+4], fat_notroot_first |
||
2960 | mov dword [esp], fat_notroot_next |
||
2961 | jmp .loop |
||
71 | diamond | 2962 | .notfound: |
83 | diamond | 2963 | add esp, 16 |
2964 | pop edi esi |
||
2965 | stc |
||
2966 | ret |
||
71 | diamond | 2967 | .found: |
86 | diamond | 2968 | lea eax, [esp+8] |
2969 | cmp dword [eax], 0 |
||
2970 | jz .root |
||
2971 | call fat_get_sector |
||
2972 | jmp .cmn |
||
2973 | .root: |
||
2974 | mov eax, [eax+4] |
||
2975 | add eax, [ROOT_START] |
||
2976 | .cmn: |
||
83 | diamond | 2977 | add esp, 20 ; CF=0 |
2978 | pop esi |
||
2979 | ret |
||
74 | mario79 | 2980 | |
71 | diamond | 2981 | ;---------------------------------------------------------------- |
2982 | ; |
||
2983 | ; fs_HdRead - LFN variant for reading hard disk |
||
2984 | ; |
||
2985 | ; esi points to filename |
||
2986 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
2987 | ; may be ebx=0 - start from first byte |
||
2988 | ; ecx number of bytes to read, 0+ |
||
2989 | ; edx mem location to return data |
||
2990 | ; |
||
77 | diamond | 2991 | ; ret ebx = bytes read or 0xffffffff file not found |
71 | diamond | 2992 | ; eax = 0 ok read or other = errormsg |
2993 | ; |
||
2994 | ;-------------------------------------------------------------- |
||
2995 | fs_HdRead: |
||
74 | mario79 | 2996 | cmp [fat_type], 0 |
2997 | jnz @f |
||
2998 | or ebx, -1 |
||
2999 | mov eax, ERROR_UNKNOWN_FS |
||
3000 | ret |
||
71 | diamond | 3001 | @@: |
74 | mario79 | 3002 | push edi |
3003 | cmp byte [esi], 0 |
||
3004 | jnz @f |
||
71 | diamond | 3005 | .noaccess: |
74 | mario79 | 3006 | pop edi |
3007 | .noaccess_2: |
||
3008 | or ebx, -1 |
||
3009 | mov eax, ERROR_ACCESS_DENIED |
||
3010 | ret |
||
3011 | |||
3012 | .noaccess_3: |
||
3013 | add esp,4 |
||
3014 | .noaccess_1: |
||
3015 | add esp,4 |
||
3016 | .noaccess_4: |
||
3017 | add esp,4*5 |
||
3018 | jmp .noaccess_2 |
||
3019 | |||
71 | diamond | 3020 | @@: |
74 | mario79 | 3021 | call hd_find_lfn |
3022 | jnc .found |
||
3023 | pop edi |
||
3024 | cmp [hd_error],0 |
||
3025 | jne .noaccess_2 |
||
3026 | or ebx, -1 |
||
3027 | mov eax, ERROR_FILE_NOT_FOUND |
||
3028 | ret |
||
3029 | |||
71 | diamond | 3030 | .found: |
74 | mario79 | 3031 | test byte [edi+11], 0x10 ; do not allow read directories |
3032 | jnz .noaccess |
||
3033 | test ebx, ebx |
||
3034 | jz .l1 |
||
3035 | cmp dword [ebx+4], 0 |
||
3036 | jz @f |
||
77 | diamond | 3037 | xor ebx, ebx |
71 | diamond | 3038 | .reteof: |
74 | mario79 | 3039 | mov eax, 6 |
3040 | pop edi |
||
3041 | ret |
||
71 | diamond | 3042 | @@: |
74 | mario79 | 3043 | mov ebx, [ebx] |
71 | diamond | 3044 | .l1: |
77 | diamond | 3045 | push ecx edx |
3046 | push 0 |
||
3047 | mov eax, [edi+28] |
||
3048 | sub eax, ebx |
||
3049 | jb .eof |
||
3050 | cmp eax, ecx |
||
3051 | jae @f |
||
3052 | mov ecx, eax |
||
3053 | mov byte [esp], 6 |
||
3054 | @@: |
||
74 | mario79 | 3055 | mov eax, [edi+20-2] |
3056 | mov ax, [edi+26] |
||
71 | diamond | 3057 | ; now eax=cluster, ebx=position, ecx=count, edx=buffer for data |
3058 | .new_cluster: |
||
74 | mario79 | 3059 | jecxz .new_sector |
3060 | test eax, eax |
||
3061 | jz .eof |
||
3062 | cmp eax, [fatRESERVED] |
||
3063 | jae .eof |
||
3064 | mov [cluster_tmp], eax |
||
3065 | dec eax |
||
3066 | dec eax |
||
3067 | mov edi, [SECTORS_PER_CLUSTER] |
||
3068 | imul eax, edi |
||
3069 | add eax, [DATA_START] |
||
71 | diamond | 3070 | .new_sector: |
74 | mario79 | 3071 | test ecx, ecx |
3072 | jz .done |
||
3073 | sub ebx, 512 |
||
3074 | jae .skip |
||
3075 | add ebx, 512 |
||
3076 | jnz .force_buf |
||
3077 | cmp ecx, 512 |
||
3078 | jb .force_buf |
||
71 | diamond | 3079 | ; we may read directly to given buffer |
74 | mario79 | 3080 | push ebx |
3081 | mov ebx, edx |
||
3082 | call hd_read |
||
3083 | cmp [hd_error],0 |
||
3084 | jne .noaccess_1 |
||
3085 | pop ebx |
||
3086 | add edx, 512 |
||
3087 | sub ecx, 512 |
||
3088 | jmp .skip |
||
71 | diamond | 3089 | .force_buf: |
3090 | ; we must read sector to temporary buffer and then copy it to destination |
||
74 | mario79 | 3091 | push eax ebx |
3092 | mov ebx, buffer |
||
3093 | call hd_read |
||
3094 | cmp [hd_error],0 |
||
3095 | jne .noaccess_3 |
||
3096 | |||
3097 | mov eax, ebx |
||
3098 | pop ebx |
||
3099 | add eax, ebx |
||
3100 | push ecx |
||
3101 | add ecx, ebx |
||
3102 | cmp ecx, 512 |
||
3103 | jbe @f |
||
3104 | mov ecx, 512 |
||
71 | diamond | 3105 | @@: |
74 | mario79 | 3106 | sub ecx, ebx |
3107 | mov ebx, edx |
||
3108 | call memmove |
||
3109 | add edx, ecx |
||
3110 | sub [esp], ecx |
||
3111 | pop ecx |
||
3112 | pop eax |
||
3113 | xor ebx, ebx |
||
71 | diamond | 3114 | .skip: |
74 | mario79 | 3115 | inc eax |
3116 | dec edi |
||
3117 | jnz .new_sector |
||
3118 | mov eax, [cluster_tmp] |
||
3119 | call get_FAT |
||
3120 | cmp [hd_error],0 |
||
3121 | jne .noaccess_4 |
||
3122 | |||
3123 | jmp .new_cluster |
||
71 | diamond | 3124 | .done: |
77 | diamond | 3125 | mov ebx, edx |
3126 | pop eax edx ecx edi |
||
3127 | sub ebx, edx |
||
3128 | ret |
||
71 | diamond | 3129 | .eof: |
77 | diamond | 3130 | mov ebx, edx |
3131 | pop eax edx ecx |
||
3132 | sub ebx, edx |
||
3133 | jmp .reteof |
||
75 | diamond | 3134 | |
3135 | ;---------------------------------------------------------------- |
||
3136 | ; |
||
3137 | ; fs_HdReadFolder - LFN variant for reading hard disk folder |
||
3138 | ; |
||
3139 | ; esi points to filename |
||
78 | diamond | 3140 | ; ebx pointer to structure 32-bit number = first wanted block, 0+ |
3141 | ; & flags (bitfields) |
||
3142 | ; flags: bit 0: 0=ANSI names, 1=UNICODE names |
||
75 | diamond | 3143 | ; ecx number of blocks to read, 0+ |
3144 | ; edx mem location to return data |
||
3145 | ; |
||
77 | diamond | 3146 | ; ret ebx = blocks read or 0xffffffff folder not found |
75 | diamond | 3147 | ; eax = 0 ok read or other = errormsg |
3148 | ; |
||
3149 | ;-------------------------------------------------------------- |
||
3150 | fs_HdReadFolder: |
||
3151 | mov eax, [ROOT_CLUSTER] |
||
3152 | push edi |
||
3153 | cmp byte [esi], 0 |
||
3154 | jz .doit |
||
3155 | call hd_find_lfn |
||
3156 | jnc .found |
||
3157 | pop edi |
||
3158 | or ebx, -1 |
||
3159 | mov eax, ERROR_FILE_NOT_FOUND |
||
3160 | ret |
||
3161 | .found: |
||
3162 | test byte [edi+11], 0x10 ; do not allow read files |
||
3163 | jnz .found_dir |
||
3164 | pop edi |
||
3165 | or ebx, -1 |
||
3166 | mov eax, ERROR_ACCESS_DENIED |
||
3167 | ret |
||
3168 | .found_dir: |
||
3169 | mov eax, [edi+20-2] |
||
3170 | mov ax, [edi+26] ; eax=cluster |
||
3171 | .doit: |
||
3172 | push esi ecx |
||
3173 | push ebp |
||
3174 | sub esp, 262*2 ; reserve space for LFN |
||
3175 | mov ebp, esp |
||
78 | diamond | 3176 | push dword [ebx+4] ; for fat_get_name: read ANSI/UNICODE name |
3177 | mov ebx, [ebx] |
||
75 | diamond | 3178 | ; init header |
3179 | push eax ecx |
||
3180 | mov edi, edx |
||
3181 | mov ecx, 32/4 |
||
3182 | xor eax, eax |
||
3183 | rep stosd |
||
3184 | pop ecx eax |
||
3185 | mov byte [edx], 1 ; version |
||
3186 | mov esi, edi ; esi points to BDFE |
||
3187 | .new_cluster: |
||
3188 | mov [cluster_tmp], eax |
||
3189 | test eax, eax |
||
3190 | jnz @f |
||
3191 | cmp [fat_type], 32 |
||
3192 | jz .notfound |
||
3193 | mov eax, [ROOT_START] |
||
3194 | push [ROOT_SECTORS] |
||
3195 | push ebx |
||
3196 | jmp .new_sector |
||
3197 | @@: |
||
3198 | dec eax |
||
3199 | dec eax |
||
3200 | imul eax, [SECTORS_PER_CLUSTER] |
||
3201 | push [SECTORS_PER_CLUSTER] |
||
3202 | add eax, [DATA_START] |
||
3203 | push ebx |
||
3204 | .new_sector: |
||
3205 | mov ebx, buffer |
||
3206 | mov edi, ebx |
||
3207 | call hd_read |
||
3208 | cmp [hd_error], 0 |
||
3209 | jnz .notfound2 |
||
3210 | add ebx, 512 |
||
3211 | push eax |
||
3212 | .l1: |
||
3213 | call fat_get_name |
||
3214 | jc .l2 |
||
3215 | cmp byte [edi+11], 0xF |
||
3216 | jnz .do_bdfe |
||
3217 | add edi, 0x20 |
||
3218 | cmp edi, ebx |
||
3219 | jb .do_bdfe |
||
3220 | pop eax |
||
3221 | inc eax |
||
3222 | dec dword [esp+4] |
||
3223 | jnz @f |
||
3224 | mov eax, [cluster_tmp] |
||
3225 | test eax, eax |
||
3226 | jz .done |
||
3227 | call get_FAT |
||
3228 | cmp [hd_error], 0 |
||
3229 | jnz .notfound2 |
||
3230 | cmp eax, 2 |
||
3231 | jb .done |
||
3232 | cmp eax, [fatRESERVED] |
||
3233 | jae .done |
||
3234 | push eax |
||
3235 | mov eax, [SECTORS_PER_CLUSTER] |
||
3236 | mov [esp+8], eax |
||
3237 | pop eax |
||
3238 | mov [cluster_tmp], eax |
||
3239 | dec eax |
||
3240 | dec eax |
||
3241 | imul eax, [SECTORS_PER_CLUSTER] |
||
3242 | add eax, [DATA_START] |
||
3243 | @@: |
||
3244 | mov ebx, buffer |
||
3245 | mov edi, ebx |
||
3246 | call hd_read |
||
3247 | cmp [hd_error], 0 |
||
3248 | jnz .notfound2 |
||
3249 | add ebx, 512 |
||
3250 | push eax |
||
3251 | .do_bdfe: |
||
3252 | inc dword [edx+8] ; new file found |
||
3253 | dec dword [esp+4] |
||
3254 | jns .l2 |
||
3255 | dec ecx |
||
3256 | js .l2 |
||
3257 | inc dword [edx+4] ; new file block copied |
||
3258 | call fat_entry_to_bdfe |
||
3259 | .l2: |
||
3260 | add edi, 0x20 |
||
3261 | cmp edi, ebx |
||
3262 | jb .l1 |
||
3263 | pop eax |
||
3264 | inc eax |
||
3265 | dec dword [esp+4] |
||
3266 | jnz .new_sector |
||
3267 | mov eax, [cluster_tmp] |
||
3268 | test eax, eax |
||
3269 | jz .done |
||
3270 | call get_FAT |
||
3271 | cmp [hd_error], 0 |
||
3272 | jnz .notfound2 |
||
3273 | cmp eax, 2 |
||
3274 | jb .done |
||
3275 | cmp eax, [fatRESERVED] |
||
3276 | jae .done |
||
3277 | push eax |
||
3278 | mov eax, [SECTORS_PER_CLUSTER] |
||
3279 | mov [esp+8], eax |
||
3280 | pop eax |
||
3281 | pop ebx |
||
3282 | add esp, 4 |
||
3283 | jmp .new_cluster |
||
3284 | .notfound2: |
||
3285 | add esp, 8 |
||
3286 | .notfound: |
||
3287 | add esp, 262*2+4 |
||
3288 | pop ebp ecx esi edi |
||
3289 | mov eax, ERROR_FILE_NOT_FOUND |
||
3290 | or ebx, -1 |
||
3291 | ret |
||
3292 | .done: |
||
3293 | add esp, 262*2+4+8 |
||
3294 | pop ebp |
||
77 | diamond | 3295 | mov ebx, [edx+4] |
75 | diamond | 3296 | xor eax, eax |
3297 | dec ecx |
||
3298 | js @f |
||
3299 | mov al, ERROR_END_OF_FILE |
||
3300 | @@: |
||
3301 | pop ecx esi edi |
||
3302 | ret |
||
3303 | |||
83 | diamond | 3304 | fat16_root_next: |
3305 | cmp edi, buffer+0x200-0x20 |
||
3306 | jae fat16_root_next_sector |
||
3307 | add edi, 0x20 |
||
3308 | ret ; CF=0 |
||
3309 | fat16_root_next_sector: |
||
3310 | ; read next sector |
||
3311 | push ecx |
||
3312 | mov ecx, [eax+4] |
||
3313 | inc ecx |
||
3314 | mov [eax+4], ecx |
||
3315 | cmp ecx, [ROOT_SECTORS] |
||
3316 | pop ecx |
||
3317 | jae fat16_root_first.readerr |
||
3318 | fat16_root_first: |
||
3319 | mov eax, [eax+4] |
||
3320 | add eax, [ROOT_START] |
||
3321 | push ebx |
||
3322 | mov edi, buffer |
||
3323 | mov ebx, edi |
||
3324 | call hd_read |
||
3325 | pop ebx |
||
3326 | cmp [hd_error], 0 |
||
3327 | jnz .readerr |
||
3328 | ret ; CF=0 |
||
3329 | .readerr: |
||
3330 | stc |
||
3331 | ret |
||
3332 | fat16_root_begin_write: |
||
3333 | push edi eax |
||
3334 | call fat16_root_first |
||
3335 | pop eax edi |
||
3336 | ret |
||
3337 | fat16_root_end_write: |
||
3338 | pusha |
||
3339 | mov eax, [eax+4] |
||
3340 | add eax, [ROOT_START] |
||
3341 | mov ebx, buffer |
||
3342 | call hd_write |
||
3343 | popa |
||
3344 | ret |
||
3345 | fat16_root_next_write: |
||
3346 | cmp edi, buffer+0x200 |
||
3347 | jae @f |
||
3348 | ret |
||
3349 | @@: |
||
3350 | call fat16_root_end_write |
||
3351 | jmp fat16_root_next_sector |
||
3352 | fat16_root_extend_dir: |
||
3353 | stc |
||
3354 | ret |
||
3355 | |||
3356 | fat_notroot_next: |
||
3357 | cmp edi, buffer+0x200-0x20 |
||
3358 | jae fat_notroot_next_sector |
||
3359 | add edi, 0x20 |
||
3360 | ret ; CF=0 |
||
3361 | fat_notroot_next_sector: |
||
3362 | push ecx |
||
3363 | mov ecx, [eax+4] |
||
3364 | inc ecx |
||
3365 | cmp ecx, [SECTORS_PER_CLUSTER] |
||
3366 | jae fat_notroot_next_cluster |
||
3367 | mov [eax+4], ecx |
||
3368 | jmp @f |
||
3369 | fat_notroot_next_cluster: |
||
3370 | push eax |
||
3371 | mov eax, [eax] |
||
3372 | call get_FAT |
||
3373 | mov ecx, eax |
||
3374 | pop eax |
||
3375 | cmp [hd_error], 0 |
||
3376 | jnz fat_notroot_next_err |
||
3377 | cmp ecx, [fatRESERVED] |
||
3378 | jae fat_notroot_next_err |
||
3379 | mov [eax], ecx |
||
3380 | and dword [eax+4], 0 |
||
3381 | @@: |
||
3382 | pop ecx |
||
3383 | fat_notroot_first: |
||
3384 | call fat_get_sector |
||
3385 | push ebx |
||
3386 | mov edi, buffer |
||
3387 | mov ebx, edi |
||
3388 | call hd_read |
||
3389 | pop ebx |
||
3390 | cmp [hd_error], 0 |
||
3391 | jnz @f |
||
3392 | ret ; CF=0 |
||
3393 | fat_notroot_next_err: |
||
3394 | pop ecx |
||
3395 | @@: |
||
3396 | stc |
||
3397 | ret |
||
3398 | fat_notroot_begin_write: |
||
3399 | push eax edi |
||
3400 | call fat_notroot_first |
||
3401 | pop edi eax |
||
3402 | ret |
||
3403 | fat_notroot_end_write: |
||
3404 | call fat_get_sector |
||
3405 | push ebx |
||
3406 | mov ebx, buffer |
||
3407 | call hd_write |
||
3408 | pop ebx |
||
3409 | ret |
||
3410 | fat_notroot_next_write: |
||
3411 | cmp edi, buffer+0x200 |
||
3412 | jae @f |
||
3413 | ret |
||
3414 | @@: |
||
3415 | push eax |
||
3416 | call fat_notroot_end_write |
||
3417 | pop eax |
||
3418 | jmp fat_notroot_next_sector |
||
3419 | fat_notroot_extend_dir: |
||
3420 | push eax |
||
3421 | mov eax, [eax] |
||
3422 | call get_free_FAT |
||
3423 | jnc .found |
||
3424 | pop eax |
||
3425 | ret ; CF=1 |
||
3426 | .found: |
||
3427 | push edx |
||
3428 | mov edx, [fatEND] |
||
3429 | call set_FAT |
||
3430 | mov edx, eax |
||
3431 | mov eax, [esp+4] |
||
3432 | mov eax, [eax] |
||
3433 | push edx |
||
3434 | mov [f_del], 1 |
||
3435 | call set_FAT |
||
3436 | pop edx |
||
3437 | cmp [hd_error], 0 |
||
3438 | jz @f |
||
3439 | pop edx |
||
3440 | pop eax |
||
3441 | stc |
||
3442 | ret |
||
3443 | @@: |
||
3444 | push ecx |
||
3445 | or ecx, -1 |
||
3446 | call add_disk_free_space |
||
3447 | ; zero new cluster |
||
3448 | mov ecx, 512/4 |
||
3449 | mov edi, buffer |
||
3450 | push edi |
||
3451 | xor eax, eax |
||
3452 | rep stosd |
||
3453 | pop edi |
||
3454 | pop ecx |
||
3455 | mov eax, [esp+4] |
||
3456 | mov [eax], edx |
||
3457 | and dword [eax+4], 0 |
||
3458 | pop edx |
||
3459 | mov eax, [eax] |
||
3460 | dec eax |
||
3461 | dec eax |
||
3462 | push ebx ecx |
||
3463 | mov ecx, [SECTORS_PER_CLUSTER] |
||
3464 | imul eax, ecx |
||
3465 | add eax, [DATA_START] |
||
3466 | mov ebx, edi |
||
3467 | @@: |
||
3468 | call hd_write |
||
3469 | inc eax |
||
3470 | loop @b |
||
3471 | pop ecx ebx eax |
||
3472 | clc |
||
3473 | ret |
||
3474 | |||
3475 | fat_get_sector: |
||
3476 | push ecx |
||
3477 | mov ecx, [eax] |
||
3478 | dec ecx |
||
3479 | dec ecx |
||
3480 | imul ecx, [SECTORS_PER_CLUSTER] |
||
3481 | add ecx, [DATA_START] |
||
3482 | add ecx, [eax+4] |
||
3483 | mov eax, ecx |
||
3484 | pop ecx |
||
3485 | ret |
||
3486 | |||
3487 | ;---------------------------------------------------------------- |
||
3488 | ; |
||
3489 | ; fs_HdRewrite - LFN variant for writing hard disk |
||
3490 | ; |
||
3491 | ; esi points to filename |
||
3492 | ; ebx ignored (reserved) |
||
3493 | ; ecx number of bytes to write, 0+ |
||
3494 | ; edx mem location to data |
||
3495 | ; |
||
3496 | ; ret ebx = number of written bytes |
||
3497 | ; eax = 0 ok read or other = errormsg |
||
3498 | ; |
||
3499 | ;-------------------------------------------------------------- |
||
3500 | fshrad: |
||
3501 | mov eax, ERROR_ACCESS_DENIED |
||
3502 | xor ebx, ebx |
||
3503 | ret |
||
3504 | fshrfs: |
||
3505 | mov eax, ERROR_UNKNOWN_FS |
||
3506 | xor ebx, ebx |
||
3507 | ret |
||
3508 | |||
3509 | fs_HdRewrite: |
||
3510 | cmp [fat_type], 0 |
||
3511 | jz fshrfs |
||
3512 | cmp byte [esi], 0 |
||
3513 | jz fshrad |
||
3514 | pushad |
||
3515 | xor ebp, ebp |
||
3516 | push esi |
||
3517 | @@: |
||
3518 | lodsb |
||
3519 | test al, al |
||
3520 | jz @f |
||
3521 | cmp al, '/' |
||
3522 | jnz @b |
||
3523 | lea ebp, [esi-1] |
||
3524 | jmp @b |
||
3525 | @@: |
||
3526 | pop esi |
||
3527 | test ebp, ebp |
||
3528 | jnz .noroot |
||
3529 | mov ebp, [ROOT_CLUSTER] |
||
3530 | cmp [fat_type], 32 |
||
3531 | jz .pushnotroot |
||
3532 | push fat16_root_extend_dir |
||
3533 | push fat16_root_end_write |
||
3534 | push fat16_root_next_write |
||
3535 | push fat16_root_begin_write |
||
3536 | xor ebp, ebp |
||
3537 | push ebp |
||
3538 | push ebp |
||
3539 | push fat16_root_first |
||
3540 | push fat16_root_next |
||
3541 | jmp .common1 |
||
3542 | .noroot: |
||
3543 | ; check existence |
||
3544 | mov byte [ebp], 0 |
||
3545 | call hd_find_lfn |
||
3546 | mov byte [ebp], '/' |
||
3547 | lea esi, [ebp+1] |
||
3548 | jnc @f |
||
3549 | mov eax, ERROR_FILE_NOT_FOUND |
||
3550 | .ret1: |
||
3551 | mov [esp+28], eax |
||
3552 | popad |
||
3553 | xor ebx, ebx |
||
3554 | ret |
||
3555 | @@: |
||
3556 | test byte [edi+11], 0x10 ; must be directory |
||
3557 | mov eax, ERROR_ACCESS_DENIED |
||
3558 | jz .ret1 |
||
3559 | mov ebp, [edi+20-2] |
||
3560 | mov bp, [edi+26] ; ebp=cluster |
||
3561 | mov eax, ERROR_FAT_TABLE |
||
3562 | cmp ebp, 2 |
||
3563 | jb .ret1 |
||
3564 | .pushnotroot: |
||
3565 | push fat_notroot_extend_dir |
||
3566 | push fat_notroot_end_write |
||
3567 | push fat_notroot_next_write |
||
3568 | push fat_notroot_begin_write |
||
3569 | push 0 |
||
3570 | push ebp |
||
3571 | push fat_notroot_first |
||
3572 | push fat_notroot_next |
||
3573 | .common1: |
||
3574 | call fat_find_lfn |
||
3575 | jc .notfound |
||
3576 | ; found, delete FAT chain |
||
3577 | push edi |
||
3578 | xor eax, eax |
||
3579 | mov dword [edi+28], eax ; zero size |
||
3580 | xor ecx, ecx |
||
3581 | mov eax, [edi+20-2] |
||
3582 | mov ax, [edi+26] |
||
3583 | mov word [edi+20], cx |
||
3584 | mov word [edi+26], cx |
||
3585 | test eax, eax |
||
3586 | jz .done1 |
||
3587 | mov [f_del], 1 |
||
3588 | @@: |
||
3589 | cmp eax, [fatRESERVED] |
||
3590 | jae .done1 |
||
3591 | push edx |
||
3592 | xor edx, edx |
||
3593 | call set_FAT |
||
3594 | mov eax, edx |
||
3595 | pop edx |
||
3596 | inc ecx |
||
3597 | jmp @b |
||
3598 | .done1: |
||
3599 | pop edi |
||
3600 | call get_time_for_file |
||
3601 | mov [edi+22], ax |
||
3602 | call get_date_for_file |
||
3603 | mov [edi+24], ax |
||
3604 | mov [edi+18], ax |
||
3605 | or byte [edi+11], 20h ; set 'archive' attribute |
||
3606 | jmp .doit |
||
3607 | .notfound: |
||
3608 | ; file is not found; generate short name |
||
3609 | call fat_name_is_legal |
||
3610 | jc @f |
||
3611 | add esp, 32 |
||
3612 | popad |
||
3613 | mov eax, ERROR_FILE_NOT_FOUND |
||
3614 | xor ebx, ebx |
||
3615 | ret |
||
3616 | @@: |
||
3617 | sub esp, 12 |
||
3618 | mov edi, esp |
||
3619 | call fat_gen_short_name |
||
3620 | .test_short_name_loop: |
||
3621 | push esi edi ecx |
||
3622 | mov esi, edi |
||
3623 | lea eax, [esp+12+12+8] |
||
3624 | mov [eax], ebp |
||
3625 | and dword [eax+4], 0 |
||
3626 | call dword [eax-4] |
||
3627 | jc .found |
||
3628 | .test_short_name_entry: |
||
3629 | cmp byte [edi+11], 0xF |
||
3630 | jz .test_short_name_cont |
||
3631 | mov ecx, 11 |
||
3632 | push esi edi |
||
3633 | repz cmpsb |
||
3634 | pop edi esi |
||
3635 | jz .short_name_found |
||
3636 | .test_short_name_cont: |
||
3637 | lea eax, [esp+12+12+8] |
||
3638 | call dword [eax-8] |
||
3639 | jnc .test_short_name_entry |
||
3640 | jmp .found |
||
3641 | .short_name_found: |
||
3642 | pop ecx edi esi |
||
3643 | call fat_next_short_name |
||
3644 | jnc .test_short_name_loop |
||
3645 | .disk_full: |
||
3646 | add esp, 12+32 |
||
3647 | popa |
||
3648 | mov eax, ERROR_DISK_FULL |
||
3649 | xor ebx, ebx |
||
3650 | ret |
||
3651 | .found: |
||
3652 | pop ecx edi esi |
||
3653 | ; now find space in directory |
||
3654 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
||
3655 | mov al, '~' |
||
3656 | push ecx edi |
||
3657 | mov ecx, 8 |
||
3658 | repnz scasb |
||
3659 | push 1 |
||
3660 | pop eax ; 1 entry |
||
3661 | jnz .notilde |
||
3662 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
||
3663 | xor eax, eax |
||
3664 | @@: |
||
3665 | cmp byte [esi], 0 |
||
3666 | jz @f |
||
3667 | inc esi |
||
3668 | inc eax |
||
3669 | jmp @b |
||
3670 | @@: |
||
3671 | sub esi, eax |
||
3672 | add eax, 12+13 |
||
3673 | mov ecx, 13 |
||
3674 | push edx |
||
3675 | cdq |
||
3676 | div ecx |
||
3677 | pop edx |
||
3678 | .notilde: |
||
3679 | push -1 |
||
3680 | push -1 |
||
3681 | push -1 |
||
3682 | ; find |
||
3683 | xor ecx, ecx |
||
3684 | push eax |
||
3685 | lea eax, [esp+16+8+12+8] |
||
3686 | mov [eax], ebp |
||
3687 | and dword [eax+4], 0 |
||
3688 | call dword [eax-4] |
||
3689 | pop eax |
||
3690 | jnc .scan_dir |
||
3691 | .fsfrfe3: |
||
3692 | add esp, 12+8+12+32 |
||
3693 | popad |
||
3694 | mov eax, 11 |
||
3695 | xor ebx, ebx |
||
3696 | ret |
||
3697 | .scan_dir: |
||
3698 | cmp byte [edi], 0 |
||
3699 | jz .free |
||
3700 | cmp byte [edi], 0xE5 |
||
3701 | jz .free |
||
3702 | xor ecx, ecx |
||
3703 | .scan_cont: |
||
3704 | push eax |
||
3705 | lea eax, [esp+16+8+12+8] |
||
3706 | call dword [eax-8] |
||
3707 | pop eax |
||
3708 | jnc .scan_dir |
||
3709 | cmp [hd_error], 0 |
||
3710 | jnz .fsfrfe3 |
||
3711 | push eax |
||
3712 | lea eax, [esp+16+8+12+8] |
||
3713 | call dword [eax+20] ; extend directory |
||
3714 | pop eax |
||
3715 | jnc .scan_dir |
||
3716 | add esp, 12+8+12+32 |
||
3717 | popad |
||
3718 | mov eax, ERROR_DISK_FULL |
||
3719 | xor ebx, ebx |
||
3720 | ret |
||
3721 | .free: |
||
3722 | test ecx, ecx |
||
3723 | jnz @f |
||
3724 | mov [esp], edi |
||
3725 | mov ecx, [esp+12+8+12+8] |
||
3726 | mov [esp+4], ecx |
||
3727 | mov ecx, [esp+12+8+12+12] |
||
3728 | mov [esp+8], ecx |
||
3729 | xor ecx, ecx |
||
3730 | @@: |
||
3731 | inc ecx |
||
3732 | cmp ecx, eax |
||
3733 | jb .scan_cont |
||
3734 | ; found! |
||
3735 | ; calculate name checksum |
||
3736 | push esi ecx |
||
3737 | mov esi, [esp+8+12] |
||
3738 | mov ecx, 11 |
||
3739 | xor eax, eax |
||
3740 | @@: |
||
3741 | ror al, 1 |
||
3742 | add al, [esi] |
||
3743 | inc esi |
||
3744 | loop @b |
||
3745 | pop ecx esi |
||
3746 | pop edi |
||
3747 | pop dword [esp+8+12+12] |
||
3748 | pop dword [esp+8+12+12] |
||
3749 | ; edi points to first entry in free chunk |
||
3750 | dec ecx |
||
3751 | jz .nolfn |
||
3752 | push esi |
||
3753 | push eax |
||
3754 | lea eax, [esp+8+8+12+8] |
||
3755 | call dword [eax+8] ; begin write |
||
3756 | mov al, 40h |
||
3757 | .writelfn: |
||
3758 | or al, cl |
||
3759 | mov esi, [esp+4] |
||
3760 | push ecx |
||
3761 | dec ecx |
||
3762 | imul ecx, 13 |
||
3763 | add esi, ecx |
||
3764 | stosb |
||
3765 | mov cl, 5 |
||
3766 | call fs_RamdiskRewrite.read_symbols |
||
3767 | mov ax, 0xF |
||
3768 | stosw |
||
3769 | mov al, [esp+4] |
||
3770 | stosb |
||
3771 | mov cl, 6 |
||
3772 | call fs_RamdiskRewrite.read_symbols |
||
3773 | xor eax, eax |
||
3774 | stosw |
||
3775 | mov cl, 2 |
||
3776 | call fs_RamdiskRewrite.read_symbols |
||
3777 | pop ecx |
||
3778 | lea eax, [esp+8+8+12+8] |
||
3779 | call dword [eax+12] ; next write |
||
3780 | xor eax, eax |
||
3781 | loop .writelfn |
||
3782 | pop eax |
||
3783 | pop esi |
||
3784 | ; lea eax, [esp+8+12+8] |
||
3785 | ; call dword [eax+16] ; end write |
||
3786 | .nolfn: |
||
3787 | xchg esi, [esp] |
||
3788 | mov ecx, 11 |
||
3789 | rep movsb |
||
3790 | mov word [edi], 20h ; attributes |
||
3791 | sub edi, 11 |
||
3792 | pop esi ecx |
||
3793 | add esp, 12 |
||
3794 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
||
3795 | call get_time_for_file |
||
3796 | mov [edi+14], ax ; creation time |
||
3797 | mov [edi+22], ax ; last write time |
||
3798 | call get_date_for_file |
||
3799 | mov [edi+16], ax ; creation date |
||
3800 | mov [edi+24], ax ; last write date |
||
3801 | mov [edi+18], ax ; last access date |
||
3802 | xor ecx, ecx |
||
3803 | mov word [edi+20], cx ; high word of cluster |
||
3804 | mov word [edi+26], cx ; low word of cluster - to be filled |
||
3805 | mov dword [edi+28], ecx ; file size - to be filled |
||
3806 | .doit: |
||
3807 | lea eax, [esp+8] |
||
3808 | call dword [eax+16] ; flush directory |
||
3809 | push ecx |
||
3810 | mov ecx, [esp+4+32+24] |
||
3811 | push ecx |
||
3812 | push edi |
||
3813 | mov esi, edx |
||
3814 | test ecx, ecx |
||
3815 | jz .done |
||
3816 | mov eax, 2 |
||
3817 | call get_free_FAT |
||
3818 | jc .diskfull |
||
3819 | push eax |
||
3820 | mov [edi+26], ax |
||
3821 | shr eax, 16 |
||
3822 | mov [edi+20], ax |
||
3823 | lea eax, [esp+16+8] |
||
3824 | call dword [eax+16] ; flush directory |
||
3825 | pop eax |
||
3826 | push edx |
||
3827 | mov edx, [fatEND] |
||
3828 | call set_FAT |
||
3829 | pop edx |
||
3830 | .write_cluster: |
||
3831 | push eax |
||
3832 | dec eax |
||
3833 | dec eax |
||
3834 | mov ebp, [SECTORS_PER_CLUSTER] |
||
3835 | imul eax, ebp |
||
3836 | add eax, [DATA_START] |
||
3837 | ; write data |
||
3838 | .write_sector: |
||
3839 | mov ecx, 512 |
||
3840 | cmp dword [esp+8], ecx |
||
3841 | jb .writeshort |
||
3842 | ; we can write directly from given buffer |
||
3843 | mov ebx, esi |
||
3844 | add esi, ecx |
||
3845 | jmp .writecommon |
||
3846 | .writeshort: |
||
3847 | mov ecx, [esp+8] |
||
3848 | push ecx |
||
3849 | mov edi, buffer |
||
3850 | mov ebx, edi |
||
3851 | rep movsb |
||
3852 | mov ecx, buffer+0x200 |
||
3853 | sub ecx, edi |
||
3854 | push eax |
||
3855 | xor eax, eax |
||
3856 | rep stosb |
||
3857 | pop eax |
||
3858 | pop ecx |
||
3859 | .writecommon: |
||
3860 | call hd_write |
||
3861 | cmp [hd_error], 0 |
||
3862 | jnz .writeerr |
||
3863 | inc eax |
||
3864 | sub dword [esp+8], ecx |
||
3865 | jz .writedone |
||
3866 | dec ebp |
||
3867 | jnz .write_sector |
||
3868 | ; allocate new cluster |
||
3869 | pop eax |
||
3870 | mov ecx, eax |
||
3871 | call get_free_FAT |
||
3872 | jc .diskfull |
||
3873 | mov [f_del], 1 |
||
3874 | push edx |
||
3875 | mov edx, [fatEND] |
||
3876 | call set_FAT |
||
3877 | xchg eax, ecx |
||
3878 | mov edx, ecx |
||
3879 | call set_FAT |
||
3880 | pop edx |
||
3881 | xchg eax, ecx |
||
3882 | jmp .write_cluster |
||
3883 | .diskfull: |
||
3884 | mov eax, ERROR_DISK_FULL |
||
3885 | jmp .ret |
||
3886 | .writeerr: |
||
3887 | pop eax |
||
3888 | sub esi, ecx |
||
3889 | mov eax, 11 |
||
3890 | jmp .ret |
||
3891 | .writedone: |
||
3892 | pop eax |
||
3893 | .done: |
||
3894 | xor eax, eax |
||
3895 | .ret: |
||
3896 | pop edi ecx |
||
3897 | mov ebx, esi |
||
3898 | sub ebx, edx |
||
3899 | pop ebp |
||
3900 | mov [esp+32+28], eax |
||
3901 | lea eax, [esp+8] |
||
3902 | call dword [eax+8] |
||
3903 | mov [edi+28], ebx |
||
3904 | call dword [eax+16] |
||
3905 | mov [esp+32+16], ebx |
||
3906 | lea eax, [ebx+511] |
||
3907 | shr eax, 9 |
||
3908 | mov ecx, [SECTORS_PER_CLUSTER] |
||
3909 | lea eax, [eax+ecx-1] |
||
3910 | xor edx, edx |
||
3911 | div ecx |
||
3912 | mov ecx, ebp |
||
3913 | sub ecx, eax |
||
3914 | call add_disk_free_space |
||
3915 | add esp, 32 |
||
3916 | call update_disk |
||
3917 | popad |
||
3918 | ret |
||
3919 | |||
86 | diamond | 3920 | fs_HdGetFileInfo: |
3921 | cmp [fat_type], 0 |
||
3922 | jnz @f |
||
3923 | mov eax, ERROR_UNKNOWN_FS |
||
3924 | ret |
||
3925 | @@: |
||
3926 | cmp byte [esi], 0 |
||
3927 | jnz @f |
||
3928 | mov eax, 2 |
||
3929 | ret |
||
3930 | @@: |
||
3931 | push edi |
||
3932 | call hd_find_lfn |
||
3933 | pushfd |
||
3934 | cmp [hd_error], 0 |
||
3935 | jz @f |
||
3936 | popfd |
||
3937 | pop edi |
||
3938 | mov eax, 11 |
||
3939 | ret |
||
3940 | @@: |
||
3941 | popfd |
||
3942 | jmp fs_GetFileInfo_finish |
||
3943 | |||
3944 | fs_HdSetFileInfo: |
||
3945 | cmp [fat_type], 0 |
||
3946 | jnz @f |
||
3947 | mov eax, ERROR_UNKNOWN_FS |
||
3948 | ret |
||
3949 | @@: |
||
3950 | cmp byte [esi], 0 |
||
3951 | jnz @f |
||
3952 | mov eax, 2 |
||
3953 | ret |
||
3954 | @@: |
||
3955 | push edi |
||
3956 | call hd_find_lfn |
||
3957 | pushfd |
||
3958 | cmp [hd_error], 0 |
||
3959 | jz @f |
||
3960 | popfd |
||
3961 | pop edi |
||
3962 | mov eax, 11 |
||
3963 | ret |
||
3964 | @@: |
||
3965 | popfd |
||
3966 | jnc @f |
||
3967 | pop edi |
||
3968 | mov eax, ERROR_FILE_NOT_FOUND |
||
3969 | ret |
||
3970 | @@: |
||
3971 | push eax |
||
3972 | call bdfe_to_fat_entry |
||
3973 | pop eax |
||
3974 | mov ebx, buffer |
||
3975 | call hd_write |
||
3976 | call update_disk |
||
3977 | pop edi |
||
3978 | xor eax, eax |
||
3979 | ret |
||
3980 | |||
74 | mario79 | 3981 | ; \end{diamond}=>=>>>>> |