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