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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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10 | ;; ;; |
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65 | mario79 | 11 | ;; 28.01.2006 find all Fat16/32 partition in all input point ;; |
12 | ;; to MBR, see file part_set.inc - Mario79 ;; |
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1 | ha | 13 | ;; 15.01.2005 get file size/attr/date, file_append - ATV ;; |
14 | ;; 04.12.2004 skip volume label, file delete bug fixed - ATV ;; |
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15 | ;; 29.11.2004 get_free_FAT changed, append dir bug fixed - ATV ;; |
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16 | ;; 23.11.2004 don't allow overwrite dir with file - ATV ;; |
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17 | ;; 18.11.2004 get_disk_info and more error codes - ATV ;; |
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18 | ;; 17.11.2004 set_FAT/get_FAT and disk cache rewritten - ATV ;; |
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19 | ;; 10.11.2004 removedir clear whole directory structure - ATV ;; |
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20 | ;; 08.11.2004 rename - ATV ;; |
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21 | ;; 30.10.2004 file_read return also dirsize in bytes - ATV ;; |
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22 | ;; 20.10.2004 Makedir/Removedir - ATV ;; |
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23 | ;; 14.10.2004 Partition chain/Fat16 - ATV (thanks drh3xx) ;; |
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24 | ;; 06.9.2004 Fix free space by Mario79 added - MH ;; |
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25 | ;; 24.5.2004 Write back buffer for File_write -VT ;; |
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26 | ;; 20.5.2004 File_read function to work with syscall 58 - VT ;; |
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27 | ;; 30.3.2004 Error parameters at function return - VT ;; |
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28 | ;; 01.5.2002 Bugfix in device write - VT ;; |
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29 | ;; 20.5.2002 Hd status check - VT ;; |
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30 | ;; 29.6.2002 Improved fat32 verification - VT ;; |
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31 | ;; ;; |
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32 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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33 | |||
34 | cache_max equ 1919 ; max. is 1919*512+0x610000=0x6ffe00 |
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35 | |||
52 | mikedld | 36 | ERROR_SUCCESS = 0 |
37 | ERROR_DISK_BASE = 1 |
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38 | ERROR_UNSUPPORTED_FS = 2 |
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39 | ERROR_UNKNOWN_FS = 3 |
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40 | ERROR_PARTITION = 4 |
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41 | ERROR_FILE_NOT_FOUND = 5 |
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42 | ERROR_END_OF_FILE = 6 |
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43 | ERROR_MEMORY_POINTER = 7 |
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44 | ERROR_DISK_FULL = 8 |
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45 | ERROR_FAT_TABLE = 9 |
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46 | ERROR_ACCESS_DENIED = 10 |
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1 | ha | 47 | |
48 | PUSHAD_EAX equ [esp+28] |
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49 | PUSHAD_ECX equ [esp+24] |
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50 | PUSHAD_EDX equ [esp+20] |
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51 | PUSHAD_EBX equ [esp+16] |
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52 | PUSHAD_EBP equ [esp+8] |
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53 | PUSHAD_ESI equ [esp+4] |
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54 | PUSHAD_EDI equ [esp+0] |
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55 | |||
56 | cluster dd 0 ; used by file_write,makedir,append |
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57 | partition_count dd 0 ; partitions found by set_FAT32_variables |
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58 | longname_sec1 dd 0 ; used by analyze_directory to save 2 previous |
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59 | longname_sec2 dd 0 ; directory sectors for delete long filename |
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60 | |||
61 | hd_error dd 0 ; set by wait_for_sector_buffer |
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62 | hd_setup dd 0 |
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63 | hd_wait_timeout dd 0 |
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64 | |||
65 | cluster_tmp dd 0 ; used by analyze_directory |
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66 | ; and analyze_directory_to_write |
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67 | |||
68 | file_size dd 0 ; used by file_read |
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69 | |||
70 | sector_tmp dd 0 ; used by rename,append,file_write |
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71 | entry_pos dd 0 ; used by rename,append,file_write |
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72 | |||
73 | old_filesize dd 0 ; used by append |
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74 | new_filepos dd 0 ; used by append |
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75 | bytes2write dd 0 ; used by append |
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76 | |||
77 | cache_search_start dd 0 ; used by find_empty_slot |
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78 | |||
79 | fat_in_cache dd -1 |
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80 | fat_cache: times 512 db 0 |
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81 | |||
82 | uglobal |
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83 | Sector512: ; label for dev_hdcd.inc |
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84 | buffer: times 512 db 0 |
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85 | deltree_buffer: times 512 db 0 |
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86 | endg |
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87 | |||
88 | iglobal |
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89 | NewDirEntry1 db ". ",0x10 |
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90 | times 20 db 0 |
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91 | NewDirEntry2 db ".. ",0x10 |
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92 | times 20 db 0 |
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93 | endg |
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94 | |||
95 | uglobal |
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96 | dir_entry: times 32 db 0 |
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97 | |||
98 | startpath: times 255 db 0 |
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99 | |||
100 | fat16_root db 0 ; flag for fat16 rootdir |
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101 | f_del db 0 ; 1=overwrite fat entry |
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102 | fat_change db 0 ; 1=fat has changed |
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103 | |||
104 | endg |
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105 | |||
106 | reserve_hd1: |
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107 | |||
108 | cli |
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109 | cmp [hd1_status],0 |
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110 | je reserve_ok1 |
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111 | |||
112 | sti |
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113 | call change_task |
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114 | jmp reserve_hd1 |
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115 | |||
116 | reserve_ok1: |
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117 | |||
118 | push eax |
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119 | mov eax,[0x3000] |
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120 | shl eax,5 |
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121 | mov eax,[eax+0x3000+4] |
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122 | mov [hd1_status],eax |
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123 | pop eax |
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124 | sti |
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125 | ret |
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126 | |||
127 | |||
128 | clear_hd_cache: |
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129 | |||
130 | push eax ecx edi |
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131 | mov edi,0x600000 |
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132 | mov ecx,16384 |
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133 | xor eax,eax |
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134 | cld |
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135 | rep stosd ; clear hd cache with 0 |
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136 | mov [cache_search_start],eax |
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137 | mov [fat_in_cache],-1 |
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138 | mov [fat_change],0 |
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139 | pop edi ecx eax |
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140 | ret |
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141 | |||
142 | problem_partition db 0 ; used for partitions search |
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143 | |||
65 | mario79 | 144 | include 'part_set.inc' |
1 | ha | 145 | |
146 | set_FAT: |
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147 | ;-------------------------------- |
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148 | ; input : EAX = cluster |
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149 | ; EDX = value to save |
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150 | ; output : EDX = old value |
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151 | ;-------------------------------- |
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152 | push eax ebx esi |
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153 | |||
154 | cmp eax,2 |
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155 | jb sfc_error |
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156 | cmp eax,[LAST_CLUSTER] |
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157 | ja sfc_error |
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158 | cmp [fat_type],16 |
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159 | je sfc_1 |
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160 | add eax,eax |
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161 | sfc_1: |
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162 | add eax,eax |
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163 | mov esi,511 |
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164 | and esi,eax ; esi = position in fat sector |
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165 | shr eax,9 ; eax = fat sector |
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166 | add eax,[FAT_START] |
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167 | mov ebx,fat_cache |
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168 | |||
169 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
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170 | je sfc_in_cache ; yes |
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171 | |||
172 | cmp [fat_change],0 ; is fat changed? |
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173 | je sfc_no_change ; no |
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174 | call write_fat_sector ; yes. write it into disk |
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175 | |||
176 | sfc_no_change: |
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177 | mov [fat_in_cache],eax ; save fat sector |
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178 | call hd_read |
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179 | |||
180 | sfc_in_cache: |
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181 | cmp [fat_type],16 |
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182 | jne sfc_test32 |
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183 | |||
184 | cmp [f_del],1 ; overwrite previous value? |
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185 | je sfc_set16 ; yes |
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186 | cmp word [ebx+esi],0 ; is cluster free? |
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187 | je sfc_set16 ; yes |
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188 | mov dword [8*0x100000],0xffffff |
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189 | mov edx,[ebx+esi] ; get old value |
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190 | jmp sfc_nonzero |
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191 | |||
192 | sfc_set16: |
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193 | xchg [ebx+esi],dx ; save new value and get old value |
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194 | jmp sfc_write |
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195 | |||
196 | sfc_test32: |
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197 | mov eax,[fatMASK] |
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198 | cmp [f_del],1 ; overwrite previous value? |
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199 | je sfc_set32 ; yes |
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200 | test eax,[ebx+esi] ; is cluster free? |
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201 | je sfc_set32 ; yes |
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202 | mov dword [8*0x100000],0xffffff |
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203 | mov edx,[ebx+esi] ; get old value |
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204 | jmp sfc_nonzero |
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205 | |||
206 | sfc_set32: |
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207 | and edx,eax |
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208 | xor eax,-1 ; mask for high bits |
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209 | and eax,[ebx+esi] ; get high 4 bits |
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210 | or eax,edx |
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211 | mov edx,[ebx+esi] ; get old value |
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212 | mov [ebx+esi],eax ; save new value |
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213 | |||
214 | sfc_write: |
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215 | mov [fat_change],1 ; fat has changed |
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216 | |||
217 | sfc_nonzero: |
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218 | and edx,[fatMASK] |
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219 | |||
220 | sfc_error: |
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221 | pop esi ebx eax |
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222 | ret |
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223 | |||
224 | |||
225 | get_FAT: |
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226 | ;-------------------------------- |
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227 | ; input : EAX = cluster |
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228 | ; output : EAX = next cluster |
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229 | ;-------------------------------- |
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230 | push ebx esi |
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231 | |||
232 | cmp [fat_type],16 |
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233 | je gfc_1 |
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234 | add eax,eax |
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235 | gfc_1: |
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236 | add eax,eax |
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237 | mov esi,511 |
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238 | and esi,eax ; esi = position in fat sector |
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239 | shr eax,9 ; eax = fat sector |
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240 | add eax,[FAT_START] |
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241 | mov ebx,fat_cache |
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242 | |||
243 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
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244 | je gfc_in_cache |
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245 | |||
246 | cmp [fat_change],0 ; is fat changed? |
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247 | je gfc_no_change ; no |
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248 | call write_fat_sector ; yes. write it into disk |
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249 | |||
250 | gfc_no_change: |
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251 | mov [fat_in_cache],eax |
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252 | call hd_read |
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253 | |||
254 | gfc_in_cache: |
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255 | mov eax,[ebx+esi] |
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256 | and eax,[fatMASK] |
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257 | pop esi ebx |
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258 | ret |
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259 | |||
260 | |||
261 | get_free_FAT: |
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262 | ;----------------------------------------------------------- |
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263 | ; input : EAX = # cluster for start the searching |
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264 | ; output : if CARRY=0 EAX = # first cluster found free |
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265 | ; if CARRY=1 disk full |
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266 | ; Note : for more speed need to use fat_cache directly |
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267 | ;----------------------------------------------------------- |
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268 | push ecx |
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269 | mov ecx,[LAST_CLUSTER] ; counter for full disk |
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270 | sub ecx,2 |
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271 | |||
272 | gff_test: |
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273 | cmp eax,[LAST_CLUSTER] ; if above last cluster start at cluster 2 |
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274 | jbe gff_in_range |
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275 | mov eax,2 |
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276 | |||
277 | gff_in_range: |
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278 | push eax |
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279 | call get_FAT ; get cluster state |
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280 | test eax,eax ; is it free? |
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281 | pop eax |
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282 | je gff_found ; yes |
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283 | inc eax ; next cluster |
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284 | dec ecx ; is all checked? |
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285 | jns gff_test ; no |
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286 | |||
287 | gff_not_found: |
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288 | pop ecx ; yes. disk is full |
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289 | stc |
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290 | ret |
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291 | |||
292 | gff_found: |
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293 | pop ecx |
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294 | clc |
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295 | ret |
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296 | |||
297 | |||
298 | write_fat_sector: |
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299 | ;----------------------------------------------------------- |
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300 | ; write changed fat to disk |
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301 | ;----------------------------------------------------------- |
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302 | push eax ebx ecx |
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303 | |||
304 | mov [fat_change],0 |
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305 | mov eax,[fat_in_cache] |
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306 | cmp eax,-1 |
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307 | jz write_fat_not_used |
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308 | mov ebx,fat_cache |
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309 | mov ecx,[NUMBER_OF_FATS] |
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310 | |||
311 | write_next_fat: |
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312 | call hd_write |
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313 | add eax,[SECTORS_PER_FAT] |
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314 | dec ecx |
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315 | jnz write_next_fat |
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316 | |||
317 | write_fat_not_used: |
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318 | pop ecx ebx eax |
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319 | ret |
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320 | |||
321 | |||
322 | analyze_directory: |
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323 | ;----------------------------------------------------------- |
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324 | ; input : EAX = first cluster of the directory |
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325 | ; EBX = pointer to filename |
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326 | ; output : IF CARRY=0 EAX = sector where th file is found |
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327 | ; EBX = pointer in buffer |
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328 | ; [buffer .. buffer+511] |
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329 | ; ECX,EDX,ESI,EDI not changed |
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330 | ; IF CARRY=1 filename not found |
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331 | ; Note : if cluster=0 it's changed to read rootdir |
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332 | ; save 2 previous directory sectors in longname_sec |
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333 | ;----------------------------------------------------------- |
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334 | push ecx edx esi edi ebx ; ebx = [esp+0] |
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335 | mov [longname_sec1],0 |
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336 | mov [longname_sec2],0 |
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337 | |||
338 | adr_new_cluster: |
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339 | mov [cluster_tmp],eax |
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340 | mov [fat16_root],0 |
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341 | cmp eax,[LAST_CLUSTER] |
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342 | ja adr_not_found ; too big cluster number, something is wrong |
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343 | cmp eax,2 |
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344 | jnb adr_data_cluster |
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345 | |||
346 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
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347 | cmp [fat_type],16 |
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348 | jne adr_data_cluster |
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349 | mov eax,[ROOT_START] |
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350 | mov edx,[ROOT_SECTORS] |
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351 | mov [fat16_root],1 ; flag for fat16 rootdir |
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352 | jmp adr_new_sector |
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353 | |||
354 | adr_data_cluster: |
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355 | sub eax,2 |
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356 | mov edx,[SECTORS_PER_CLUSTER] |
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357 | imul eax,edx |
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358 | add eax,[DATA_START] |
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359 | |||
360 | adr_new_sector: |
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361 | mov ebx,buffer |
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362 | call hd_read |
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363 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
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364 | |||
365 | adr_analyze: |
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366 | mov edi,[ebx+11] ; file attribute |
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367 | and edi,0xf |
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368 | cmp edi,0xf |
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369 | je adr_long_filename |
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370 | test edi,0x8 ; skip over volume label |
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371 | jne adr_long_filename ; Note: label can be same name as file/dir |
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372 | |||
373 | mov esi,[esp+0] ; filename need to be uppercase |
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374 | mov edi,ebx |
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375 | push ecx |
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376 | mov ecx,11 |
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377 | cld |
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378 | rep cmpsb ; compare 8+3 filename |
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379 | pop ecx |
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380 | je adr_found |
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381 | |||
382 | adr_long_filename: |
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383 | add ebx,32 ; position of next dir entry |
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384 | dec ecx |
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385 | jnz adr_analyze |
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386 | |||
387 | mov ecx,[longname_sec1] ; save 2 previous directory sectors |
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388 | mov [longname_sec1],eax ; for delete long filename |
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389 | mov [longname_sec2],ecx |
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390 | inc eax ; next sector |
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391 | dec edx |
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392 | jne adr_new_sector |
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393 | cmp [fat16_root],1 ; end of fat16 rootdir |
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394 | je adr_not_found |
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395 | |||
396 | adr_next_cluster: |
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397 | mov eax,[cluster_tmp] |
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398 | call get_FAT ; get next cluster |
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399 | cmp eax,2 ; incorrect fat chain? |
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400 | jb adr_not_found ; yes |
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401 | cmp eax,[fatRESERVED] ; is it end of directory? |
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402 | jb adr_new_cluster ; no. analyse it |
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403 | |||
404 | adr_not_found: |
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405 | pop edi edi esi edx ecx ; first edi will remove ebx |
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406 | stc ; file not found |
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407 | ret |
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408 | |||
409 | adr_found: |
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410 | pop edi edi esi edx ecx ; first edi will remove ebx |
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411 | clc ; file found |
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412 | ret |
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413 | |||
414 | |||
415 | analyze_directory_to_write: |
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416 | ;----------------------------------------------------------- |
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417 | ; input : EAX = first cluster of the directory |
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418 | ; output : IF CARRY=0 EAX = sector where the empty pos is found |
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419 | ; EBX = pointer in buffer |
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420 | ; [buffer .. buffer+511] |
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421 | ; ECX,EDX,ESI,EDI not changed |
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422 | ; IF CARRY=1 disk full or fat corrupted |
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423 | ; Note : if cluster=0 it's changed to read rootdir |
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424 | ;----------------------------------------------------------- |
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425 | push ecx edx edi |
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426 | |||
427 | adw_new_cluster: |
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428 | mov [cluster_tmp],eax |
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429 | mov [fat16_root],0 |
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430 | cmp eax,[LAST_CLUSTER] |
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431 | ja adw_not_found ; too big cluster number, something is wrong |
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432 | cmp eax,2 |
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433 | jnb adw_data_cluster |
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434 | |||
435 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
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436 | cmp [fat_type],16 |
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437 | jne adw_data_cluster |
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438 | mov eax,[ROOT_START] |
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439 | mov edx,[ROOT_SECTORS] |
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440 | mov [fat16_root],1 ; flag for fat16 rootdir |
||
441 | jmp adw_new_sector |
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442 | |||
443 | adw_data_cluster: |
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444 | sub eax,2 |
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445 | mov edx,[SECTORS_PER_CLUSTER] |
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446 | imul eax,edx |
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447 | add eax,[DATA_START] |
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448 | |||
449 | adw_new_sector: |
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450 | mov ebx,buffer |
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451 | call hd_read |
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452 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
||
453 | |||
454 | adw_analyze: |
||
455 | cmp byte [ebx],0x00 ; is free entry? |
||
456 | je adw_found ; yes |
||
457 | cmp byte [ebx],0xe5 ; is deleted entry? |
||
458 | je adw_found ; yes |
||
459 | add ebx,32 ; position of next dir entry |
||
460 | dec ecx |
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461 | jnz adw_analyze |
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462 | |||
463 | inc eax ; next sector |
||
464 | dec edx |
||
465 | jne adw_new_sector |
||
466 | cmp [fat16_root],1 ; end of fat16 rootdir |
||
467 | je adw_not_found |
||
468 | |||
469 | mov eax,[cluster_tmp] |
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470 | call get_FAT ; get next cluster |
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471 | cmp eax,2 ; incorrect fat chain? |
||
472 | jb adw_not_found ; yes |
||
473 | cmp eax,[fatRESERVED] ; is it end of directory? |
||
474 | jb adw_new_cluster ; no. analyse it |
||
475 | |||
476 | mov eax,2 ; this block of code add a new cluster |
||
477 | call get_free_FAT ; for the directory because the directory |
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478 | jc adw_not_found ; is full |
||
479 | |||
480 | mov edx,[fatEND] ; new end for directory |
||
481 | call set_FAT |
||
482 | |||
483 | push eax ; save new cluster |
||
484 | mov edx,eax |
||
485 | mov eax,[cluster_tmp] ; change last cluster to point new cluster |
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486 | mov [f_del],1 |
||
487 | call set_FAT |
||
488 | mov [f_del],0 |
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489 | |||
490 | mov ecx,-1 ; remove 1 cluster from free disk space |
||
491 | call add_disk_free_space |
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492 | |||
493 | mov ecx,512/4 |
||
494 | xor eax,eax |
||
495 | mov edi,buffer |
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496 | cld |
||
497 | rep stosd ; clear new directory cluster |
||
498 | pop eax |
||
499 | |||
500 | sub eax,2 |
||
501 | mov ecx,[SECTORS_PER_CLUSTER] |
||
502 | imul eax,ecx |
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503 | add eax,[DATA_START] |
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504 | mov ebx,buffer |
||
505 | push eax ; save sector number |
||
506 | |||
507 | adw_set_empty_directory: |
||
508 | call hd_write |
||
509 | inc eax ; next sector |
||
510 | dec ecx |
||
511 | jnz adw_set_empty_directory |
||
512 | |||
513 | pop eax |
||
514 | |||
515 | adw_found: |
||
516 | pop edi edx ecx |
||
517 | clc ; free space found |
||
518 | ret |
||
519 | |||
520 | adw_not_found: |
||
521 | pop edi edx ecx |
||
522 | stc ; free space not found |
||
523 | ret |
||
524 | |||
525 | |||
526 | get_data_cluster: |
||
527 | ;----------------------------------------------------------- |
||
528 | ; input : EAX = cluster |
||
529 | ; EBX = pointer to buffer |
||
530 | ; EDX = # blocks to read in buffer |
||
531 | ; ESI = # blocks to skip over |
||
532 | ; output : if CARRY=0 ok EBX/EDX/ESI updated |
||
533 | ; if CARRY=1 cluster out of range |
||
534 | ; Note : if cluster=0 it's changed to read rootdir |
||
535 | ;----------------------------------------------------------- |
||
536 | push eax ecx |
||
537 | |||
538 | mov [fat16_root],0 |
||
539 | cmp eax,[LAST_CLUSTER] |
||
540 | ja gdc_error ; too big cluster number, something is wrong |
||
541 | cmp eax,2 |
||
542 | jnb gdc_cluster |
||
543 | |||
544 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
||
545 | cmp [fat_type],16 |
||
546 | jne gdc_cluster |
||
547 | mov eax,[ROOT_START] |
||
548 | mov ecx,[ROOT_SECTORS] ; Note: not cluster size |
||
549 | mov [fat16_root],1 ; flag for fat16 rootdir |
||
550 | jmp gdc_read |
||
551 | |||
552 | gdc_cluster: |
||
553 | sub eax,2 |
||
554 | mov ecx,[SECTORS_PER_CLUSTER] |
||
555 | imul eax,ecx |
||
556 | add eax,[DATA_START] |
||
557 | |||
558 | gdc_read: |
||
559 | test esi,esi ; first wanted block |
||
560 | je gdcl1 ; yes, skip count is 0 |
||
561 | dec esi |
||
562 | jmp gdcl2 |
||
563 | |||
564 | gdcl1: |
||
565 | call hd_read |
||
566 | add ebx,512 ; update pointer |
||
567 | dec edx |
||
568 | |||
569 | gdcl2: |
||
570 | test edx,edx ; is all read? |
||
571 | je out_of_read |
||
572 | |||
573 | inc eax ; next sector |
||
574 | dec ecx |
||
575 | jnz gdc_read |
||
576 | |||
577 | out_of_read: |
||
578 | pop ecx eax |
||
579 | clc |
||
580 | ret |
||
581 | |||
582 | gdc_error: |
||
583 | pop ecx eax |
||
584 | stc |
||
585 | ret |
||
586 | |||
587 | |||
588 | set_data_cluster: |
||
589 | ;----------------------------------------------------------- |
||
590 | ; input : EAX = cluster |
||
591 | ; EBX = pointer to buffer |
||
592 | ; output : if CARRY=0 ok |
||
593 | ; if CARRY=1 cluster out of range |
||
594 | ;----------------------------------------------------------- |
||
595 | push eax ebx edx |
||
596 | |||
597 | cmp eax,[LAST_CLUSTER] |
||
598 | ja sdc_error ; too big cluster number, something is wrong |
||
599 | sub eax,2 |
||
600 | jb sdc_error ; don't allow rootdir write |
||
601 | |||
602 | mov edx,[SECTORS_PER_CLUSTER] |
||
603 | imul eax,edx |
||
604 | add eax,[DATA_START] |
||
605 | |||
606 | sdc_write: |
||
607 | call hd_write |
||
608 | add ebx,512 ; update pointer |
||
609 | inc eax |
||
610 | dec edx |
||
611 | jnz sdc_write |
||
612 | pop edx ebx eax |
||
613 | clc |
||
614 | ret |
||
615 | |||
616 | sdc_error: |
||
617 | pop edx ebx eax |
||
618 | stc |
||
619 | ret |
||
620 | |||
621 | |||
622 | get_cluster_of_a_path: |
||
623 | ;--------------------------------------------------------- |
||
624 | ; input : EBX = pointer to a path string |
||
625 | ; (example: the path "/files/data/document" become |
||
626 | ; "files......data.......document...0" |
||
627 | ; '.' = space char |
||
628 | ; '0' = char(0) (ASCII=0) !!! ) |
||
629 | ; output : if (CARRY=1) -> ERROR in the PATH |
||
630 | ; if (CARRY=0) -> EAX=cluster |
||
631 | ;--------------------------------------------------------- |
||
632 | push ebx edx |
||
633 | |||
634 | mov eax,[ROOT_CLUSTER] |
||
635 | mov edx,ebx |
||
636 | |||
637 | search_end_of_path: |
||
638 | cmp byte [edx],0 |
||
639 | je found_end_of_path |
||
640 | |||
641 | inc edx ; '/' |
||
642 | mov ebx,edx |
||
643 | call analyze_directory |
||
644 | jc directory_not_found |
||
645 | |||
646 | mov eax,[ebx+20-2] ; read the HIGH 16bit cluster field |
||
647 | mov ax,[ebx+26] ; read the LOW 16bit cluster field |
||
648 | and eax,[fatMASK] |
||
649 | add edx,11 ; 8+3 (name+extension) |
||
650 | jmp search_end_of_path |
||
651 | |||
652 | found_end_of_path: |
||
653 | pop edx ebx |
||
654 | clc ; no errors |
||
655 | ret |
||
656 | |||
657 | directory_not_found: |
||
658 | pop edx ebx |
||
659 | stc ; errors occour |
||
660 | ret |
||
661 | |||
662 | |||
663 | bcd2bin: |
||
664 | ;---------------------------------- |
||
665 | ; input : AL=BCD number (eg. 0x11) |
||
666 | ; output : AH=0 |
||
667 | ; AL=decimal number (eg. 11) |
||
668 | ;---------------------------------- |
||
669 | xor ah,ah |
||
670 | shl ax,4 |
||
671 | shr al,4 |
||
672 | aad |
||
673 | ret |
||
674 | |||
675 | |||
676 | get_date_for_file: |
||
677 | ;----------------------------------------------------- |
||
678 | ; Get date from CMOS and pack day,month,year in AX |
||
679 | ; DATE bits 0..4 : day of month 0..31 |
||
680 | ; 5..8 : month of year 1..12 |
||
681 | ; 9..15 : count of years from 1980 |
||
682 | ;----------------------------------------------------- |
||
683 | mov al,0x7 ;day |
||
684 | out 0x70,al |
||
685 | in al,0x71 |
||
686 | call bcd2bin |
||
687 | ror eax,5 |
||
688 | |||
689 | mov al,0x8 ;month |
||
690 | out 0x70,al |
||
691 | in al,0x71 |
||
692 | call bcd2bin |
||
693 | ror eax,4 |
||
694 | |||
695 | mov al,0x9 ;year |
||
696 | out 0x70,al |
||
697 | in al,0x71 |
||
698 | call bcd2bin |
||
699 | add ax,20 ;because CMOS return only the two last |
||
700 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
||
701 | rol eax,9 ;need the difference with 1980 (eg. 2001-1980) |
||
702 | ret |
||
703 | |||
704 | |||
705 | get_time_for_file: |
||
706 | ;----------------------------------------------------- |
||
707 | ; Get time from CMOS and pack hour,minute,second in AX |
||
708 | ; TIME bits 0..4 : second (the low bit is lost) |
||
709 | ; 5..10 : minute 0..59 |
||
710 | ; 11..15 : hour 0..23 |
||
711 | ;----------------------------------------------------- |
||
712 | mov al,0x0 ;second |
||
713 | out 0x70,al |
||
714 | in al,0x71 |
||
715 | call bcd2bin |
||
716 | ror eax,6 |
||
717 | |||
718 | mov al,0x2 ;minute |
||
719 | out 0x70,al |
||
720 | in al,0x71 |
||
721 | call bcd2bin |
||
722 | ror eax,6 |
||
723 | |||
724 | mov al,0x4 ;hour |
||
725 | out 0x70,al |
||
726 | in al,0x71 |
||
727 | call bcd2bin |
||
728 | rol eax,11 |
||
729 | ret |
||
730 | |||
731 | |||
732 | set_current_time_for_entry: |
||
733 | ;----------------------------------------------------- |
||
734 | ; Set current time/date for file entry |
||
735 | ; input : ebx = file entry pointer |
||
736 | ;----------------------------------------------------- |
||
737 | push eax |
||
738 | call get_time_for_file ; update files date/time |
||
739 | mov [ebx+22],ax |
||
740 | call get_date_for_file |
||
741 | mov [ebx+24],ax |
||
742 | pop eax |
||
743 | ret |
||
744 | |||
745 | |||
746 | makedir: |
||
747 | ;----------------------------------------------------- |
||
748 | ; input : eax = directory name |
||
749 | ; edx = path |
||
750 | ; output : eax = 0 - ok |
||
751 | ; 3 - unknown FS |
||
752 | ; 5 - file not found |
||
753 | ; 8 - disk full |
||
754 | ; 10 - access denied |
||
755 | ; Note : can only make one directory at time |
||
756 | ;----------------------------------------------------- |
||
757 | cmp [fat_type],0 |
||
758 | jnz make_dir_fat_ok |
||
759 | mov eax,ERROR_UNKNOWN_FS |
||
760 | ret |
||
761 | |||
762 | make_dir_fat_ok: |
||
763 | ; call reserve_hd1 |
||
764 | |||
765 | pushad |
||
766 | |||
767 | mov ebx,edx |
||
768 | call get_cluster_of_a_path |
||
769 | jnc make_dir_found_path |
||
770 | |||
771 | make_dir_path_not_found: |
||
772 | popad |
||
773 | call update_disk ; write all of cache and fat to hd |
||
774 | mov [hd1_status],0 |
||
775 | mov eax,ERROR_FILE_NOT_FOUND |
||
776 | ret |
||
777 | |||
778 | make_dir_disk_full: |
||
779 | popad |
||
780 | call update_disk ; write all of cache and fat to hd |
||
781 | mov [hd1_status],0 |
||
782 | mov eax,ERROR_DISK_FULL |
||
783 | ret |
||
784 | |||
785 | make_dir_already_exist: |
||
786 | mov eax,[cluster] ; directory cluster |
||
787 | xor edx,edx ; free |
||
788 | mov [f_del],1 |
||
789 | call set_FAT |
||
790 | mov [f_del],0 |
||
791 | |||
792 | popad |
||
793 | call update_disk ; write all of cache and fat to hd |
||
794 | mov [hd1_status],0 |
||
795 | mov eax,ERROR_ACCESS_DENIED |
||
796 | ret |
||
797 | |||
798 | make_dir_found_path: |
||
799 | cmp eax,[ROOT_CLUSTER] |
||
800 | jnz make_dir_not_root |
||
801 | xor eax,eax |
||
802 | |||
803 | make_dir_not_root: |
||
804 | mov ecx,eax ; directorys start cluster |
||
805 | mov word [NewDirEntry2+26],cx ; 16 bits low of cluster |
||
806 | shr ecx,16 |
||
807 | mov word [NewDirEntry2+20],cx ; 16 bits high of cluster (=0 fat16) |
||
808 | |||
809 | push eax ; save parent directory cluster |
||
810 | mov eax,2 |
||
811 | call get_free_FAT |
||
812 | mov [cluster],eax ; first free cluster |
||
813 | pop eax |
||
814 | jc make_dir_disk_full |
||
815 | |||
816 | push eax |
||
817 | mov eax,[cluster] ; directory cluster |
||
818 | mov edx,[fatEND] ; end for directory |
||
819 | call set_FAT |
||
820 | pop eax |
||
821 | |||
822 | mov ebx,PUSHAD_EAX ; dir name |
||
823 | push eax |
||
824 | call analyze_directory ; check if directory already exist |
||
825 | pop eax |
||
826 | jnc make_dir_already_exist ; need to free allocated cluster! |
||
827 | |||
828 | call analyze_directory_to_write |
||
829 | jc make_dir_already_exist ; need to free allocated cluster! |
||
830 | |||
831 | mov esi,PUSHAD_EAX ; dir name |
||
832 | mov edi,ebx ; pointer in buffer |
||
833 | mov ecx,11 |
||
834 | cld |
||
835 | rep movsb |
||
836 | |||
837 | mov dword [ebx+28],0 ; dir size is always 0 |
||
838 | mov ecx,[cluster] |
||
839 | mov [ebx+26],cx ; 16 bits low of cluster |
||
840 | mov word [NewDirEntry1+26],cx |
||
841 | shr ecx,16 |
||
842 | mov [ebx+20],cx ; 16 bits high of cluster (=0 fat16) |
||
843 | mov word [NewDirEntry1+20],cx |
||
844 | mov byte [ebx+11],0x10 ; attribute = directory |
||
845 | |||
846 | call set_current_time_for_entry |
||
847 | mov ecx,[ebx+22] |
||
848 | mov dword [NewDirEntry1+22],ecx |
||
849 | mov dword [NewDirEntry2+22],ecx |
||
850 | |||
851 | mov ebx,buffer ; save the directory name,length,cluster |
||
852 | call hd_write |
||
853 | |||
854 | mov ecx,512/4 |
||
855 | xor eax,eax |
||
856 | mov edi,buffer |
||
857 | cld |
||
858 | rep stosd ; clear new directory cluster |
||
859 | |||
860 | mov eax,[cluster] ; new directory cluster |
||
861 | sub eax,2 |
||
862 | mov edx,[SECTORS_PER_CLUSTER] |
||
863 | imul eax,edx |
||
864 | add eax,[DATA_START] |
||
865 | mov ebx,buffer |
||
866 | add eax,edx ; start from last sector |
||
867 | |||
868 | dir_set_empty_directory: |
||
869 | dec eax ; next sector |
||
870 | cmp edx,1 ; is first directory sector? |
||
871 | jnz not_first_sector ; no. write empty sector |
||
872 | mov esi,NewDirEntry1 |
||
873 | mov edi,buffer |
||
874 | mov ecx,64/4 |
||
875 | cld |
||
876 | rep movsd ; copy 2 first directory entrys "." and ".." |
||
877 | |||
878 | not_first_sector: |
||
879 | call hd_write |
||
880 | dec edx |
||
881 | jnz dir_set_empty_directory |
||
882 | |||
883 | mov ecx,-1 ; remove 1 cluster from free disk space |
||
884 | call add_disk_free_space |
||
885 | |||
886 | popad |
||
887 | call update_disk ; write all of cache and fat to hd |
||
888 | mov [hd1_status],0 |
||
889 | xor eax,eax |
||
890 | ret |
||
891 | |||
892 | |||
893 | removedir: |
||
894 | ;----------------------------------------------------- |
||
895 | ; input : eax = file/directory name |
||
896 | ; edx = path |
||
897 | ; output : eax = 0 - ok |
||
898 | ; 3 - unknown FS |
||
899 | ; 5 - file not found |
||
900 | ; 10 - access denied |
||
901 | ;----------------------------------------------------- |
||
902 | cmp [fat_type],0 |
||
903 | jnz remove_dir_fat_ok |
||
904 | mov eax,ERROR_UNKNOWN_FS |
||
905 | ret |
||
906 | |||
907 | remove_dir_fat_ok: |
||
908 | ; call reserve_hd1 |
||
909 | |||
910 | push edi |
||
911 | mov edi,1 ; allow directory remove |
||
912 | call file_delete |
||
913 | pop edi |
||
914 | |||
915 | call update_disk ; write all of cache and fat to hd |
||
916 | mov [hd1_status],0 |
||
917 | ret |
||
918 | |||
919 | |||
920 | add_disk_free_space: |
||
921 | ;----------------------------------------------------- |
||
922 | ; input : ecx = cluster count |
||
923 | ; Note : negative = remove clusters from free space |
||
924 | ; positive = add clusters to free space |
||
925 | ;----------------------------------------------------- |
||
926 | test ecx,ecx ; no change |
||
927 | je add_dfs_no |
||
928 | cmp [fat_type],32 ; free disk space only used by fat32 |
||
929 | jne add_dfs_no |
||
930 | |||
931 | push eax ebx |
||
932 | mov eax,[ADR_FSINFO] |
||
933 | mov ebx,buffer |
||
934 | call hd_read |
||
935 | cmp dword [ebx+0x1fc],0xaa550000 ; check sector id |
||
936 | jne add_not_fs |
||
937 | |||
938 | add [ebx+0x1e8],ecx |
||
939 | call hd_write |
||
940 | |||
941 | add_not_fs: |
||
942 | pop ebx eax |
||
943 | |||
944 | add_dfs_no: |
||
945 | ret |
||
946 | |||
947 | |||
948 | file_append: |
||
949 | ;----------------------------------------------------- |
||
950 | ; input : eax = file name |
||
951 | ; edx = path |
||
952 | ; ecx = pointer to buffer |
||
953 | ; ebx = bytes to write (0 = truncate file) |
||
954 | ; esi = start position (-1 = end of file) |
||
955 | ; output : eax = 0 - ok |
||
956 | ; 3 - unknown FS |
||
957 | ; 5 - file not found |
||
958 | ; 6 - end of file |
||
959 | ; 8 - disk full |
||
960 | ; 9 - fat table corrupted |
||
961 | ; 10 - access denied |
||
962 | ; ebx = bytes written |
||
963 | ;----------------------------------------------------- |
||
964 | cmp [fat_type],0 |
||
965 | jnz append_fat_ok |
||
966 | mov eax,ERROR_UNKNOWN_FS |
||
967 | ret |
||
968 | |||
969 | append_fat_ok: |
||
970 | ; call reserve_hd1 |
||
971 | |||
972 | pushad |
||
973 | |||
974 | mov ebx,edx |
||
975 | call get_cluster_of_a_path |
||
976 | jc append_not_found |
||
977 | |||
978 | mov ebx,PUSHAD_EAX ; file name |
||
979 | call analyze_directory |
||
980 | jc append_not_found |
||
981 | |||
982 | mov [sector_tmp],eax |
||
983 | mov [entry_pos],ebx |
||
984 | |||
985 | test byte [ebx+11],0x10 ; is it directory? |
||
986 | jnz append_access ; yes |
||
987 | |||
988 | mov ecx,[ebx+28] ; file size |
||
989 | mov edi,PUSHAD_ESI ; write position |
||
990 | cmp edi,-1 ; -1 = eof |
||
991 | jnz append_inside_file |
||
992 | mov edi,ecx ; file size |
||
993 | |||
994 | append_inside_file: |
||
995 | cmp edi,ecx ; start above old file size? |
||
996 | ja append_eof ; yes |
||
997 | |||
998 | mov [old_filesize],ecx |
||
999 | mov [new_filepos],edi |
||
1000 | |||
1001 | mov ecx,PUSHAD_EBX ; bytes to write |
||
1002 | test ecx,ecx ; truncate? |
||
1003 | jz append_truncate ; yes |
||
1004 | |||
1005 | mov [bytes2write],ecx ; bytes to write |
||
1006 | mov esi,PUSHAD_ECX ; pointer to buffer |
||
1007 | mov eax,[ebx+20-2] ; FAT entry |
||
1008 | mov ax,[ebx+26] |
||
1009 | and eax,[fatMASK] |
||
1010 | jnz append_find_pos ; first cluster <> 0 |
||
1011 | |||
1012 | mov eax,2 |
||
1013 | call get_free_FAT |
||
1014 | jc append_disk_full |
||
1015 | mov ecx,eax ; set files first cluster |
||
1016 | mov [ebx+26],cx ; 16 bits low of cluster |
||
1017 | shr ecx,16 |
||
1018 | mov [ebx+20],cx ; 16 bits high of cluster (=0 fat16) |
||
1019 | mov edx,[fatEND] ; new end for cluster chain |
||
1020 | call set_FAT |
||
1021 | |||
1022 | push eax ; save first cluster |
||
1023 | mov eax,[sector_tmp] |
||
1024 | mov ebx,buffer |
||
1025 | call hd_write ; write new file entry back to disk |
||
1026 | pop eax |
||
1027 | |||
1028 | append_remove_free: |
||
1029 | mov ecx,-1 ; remove 1 cluster from free disk space |
||
1030 | call add_disk_free_space ; Note: uses buffer |
||
1031 | |||
1032 | append_found_cluster: |
||
1033 | mov [cluster],eax |
||
1034 | sub eax,2 |
||
1035 | mov ecx,[SECTORS_PER_CLUSTER] |
||
1036 | imul eax,ecx |
||
1037 | add eax,[DATA_START] |
||
1038 | xor edi,edi |
||
1039 | |||
1040 | append_new_sector: |
||
1041 | push ecx |
||
1042 | mov ecx,[bytes2write] ; bytes left in buffer |
||
1043 | mov ebx,512 |
||
1044 | sub ebx,edi ; bytes left in sector |
||
1045 | cmp ecx,ebx |
||
1046 | jb append_bytes_ok |
||
1047 | mov ecx,ebx |
||
1048 | |||
1049 | append_bytes_ok: |
||
1050 | cmp ecx,512 ; overwrite full sector? |
||
1051 | jz append_full_sector ; yes |
||
1052 | mov ebx,buffer ; overwrite part of sector |
||
1053 | call hd_read ; read old sector |
||
1054 | |||
1055 | append_full_sector: |
||
1056 | sub [bytes2write],ecx |
||
1057 | add [new_filepos],ecx |
||
1058 | add edi,buffer |
||
1059 | cld |
||
1060 | rep movsb |
||
1061 | pop ecx |
||
1062 | |||
1063 | mov ebx,buffer |
||
1064 | call hd_write |
||
1065 | cmp [bytes2write],0 ; is all done? |
||
1066 | jz append_done |
||
1067 | xor edi,edi |
||
1068 | inc eax |
||
1069 | dec ecx |
||
1070 | jnz append_new_sector |
||
1071 | |||
1072 | mov eax,[cluster] |
||
1073 | call get_FAT |
||
1074 | cmp eax,2 |
||
1075 | jb append_fat |
||
1076 | cmp eax,[LAST_CLUSTER] |
||
1077 | jbe append_found_cluster |
||
1078 | |||
1079 | append_alloc_cluster: |
||
1080 | mov eax,2 ; ToDo: use temp array to keep track |
||
1081 | call get_free_FAT ; of last free cluster |
||
1082 | jc append_disk_full |
||
1083 | push eax ; save new cluster |
||
1084 | mov edx,[fatEND] ; new end for cluster chain |
||
1085 | call set_FAT |
||
1086 | mov edx,eax |
||
1087 | mov eax,[cluster] |
||
1088 | mov [f_del],1 |
||
1089 | call set_FAT ; update previous cluster |
||
1090 | mov [f_del],0 |
||
1091 | pop eax |
||
1092 | jmp append_remove_free |
||
1093 | |||
1094 | append_find_pos: |
||
1095 | call find_filepos |
||
1096 | mov [cluster],ebx |
||
1097 | jnc append_new_sector |
||
1098 | test edi,edi |
||
1099 | jz append_alloc_cluster |
||
1100 | |||
1101 | append_fat: |
||
1102 | mov eax,ERROR_FAT_TABLE |
||
1103 | jmp append_ret_code |
||
1104 | |||
1105 | append_disk_full: |
||
1106 | mov eax,ERROR_DISK_FULL |
||
1107 | jmp append_ret_code |
||
1108 | |||
1109 | append_done: |
||
1110 | xor eax,eax |
||
1111 | |||
1112 | append_ret_code: |
||
1113 | mov PUSHAD_EAX,eax ; return code |
||
1114 | |||
1115 | mov eax,[sector_tmp] ; update directory entry |
||
1116 | mov ebx,buffer |
||
1117 | call hd_read |
||
1118 | mov ebx,[entry_pos] |
||
1119 | mov ecx,[new_filepos] |
||
1120 | cmp ecx,[old_filesize] ; is file pos above old size? |
||
1121 | jbe append_size_ok ; no |
||
1122 | mov [ebx+28],ecx ; new file size |
||
1123 | |||
1124 | append_size_ok: |
||
1125 | call set_current_time_for_entry |
||
1126 | mov ebx,buffer |
||
1127 | call hd_write ; write new file entry back to disk |
||
1128 | |||
1129 | sub ecx,PUSHAD_ESI ; start position |
||
1130 | mov PUSHAD_EBX,ecx ; bytes written |
||
1131 | popad |
||
1132 | call update_disk ; write all of cache and fat to hd |
||
1133 | mov [hd1_status],0 |
||
1134 | ret |
||
1135 | |||
1136 | append_eof: |
||
1137 | popad |
||
1138 | mov [hd1_status],0 |
||
1139 | xor ebx,ebx |
||
1140 | mov eax,ERROR_END_OF_FILE |
||
1141 | ret |
||
1142 | |||
1143 | append_not_found: |
||
1144 | popad |
||
1145 | mov [hd1_status],0 |
||
1146 | xor ebx,ebx |
||
1147 | mov eax,ERROR_FILE_NOT_FOUND |
||
1148 | ret |
||
1149 | |||
1150 | append_access: |
||
1151 | popad |
||
1152 | mov [hd1_status],0 |
||
1153 | xor ebx,ebx |
||
1154 | mov eax,ERROR_ACCESS_DENIED |
||
1155 | ret |
||
1156 | |||
1157 | append_truncate: |
||
1158 | mov edx,[ebx+20-2] ; FAT entry |
||
1159 | mov dx,[ebx+26] |
||
1160 | and edx,[fatMASK] |
||
1161 | mov [ebx+28],edi ; set new file size |
||
1162 | test edi,edi ; 0 length file? |
||
1163 | jnz truncate_save_size ; no |
||
1164 | mov [ebx+20],di ; FAT entry = 0 |
||
1165 | mov [ebx+26],di |
||
1166 | |||
1167 | truncate_save_size: |
||
1168 | call set_current_time_for_entry |
||
1169 | mov ebx,buffer |
||
1170 | call hd_write |
||
1171 | mov eax,edx ; first cluster |
||
1172 | test edi,edi ; 0 length file? |
||
1173 | jz truncate_clear_chain |
||
1174 | |||
1175 | imul esi,[SECTORS_PER_CLUSTER],512 ; esi = cluster size in bytes |
||
1176 | |||
1177 | truncate_new_cluster: |
||
1178 | cmp eax,2 ; incorrect fat chain? |
||
1179 | jb truncate_eof ; yes |
||
1180 | cmp eax,[fatRESERVED] ; is it end of file? |
||
1181 | jnb truncate_eof ; yes |
||
1182 | sub edi,esi |
||
1183 | jbe truncate_pos_found |
||
1184 | call get_FAT ; get next cluster |
||
1185 | jmp truncate_new_cluster |
||
1186 | |||
1187 | truncate_pos_found: |
||
1188 | mov edx,[fatEND] ; new end for cluster chain |
||
1189 | mov [f_del],1 |
||
1190 | call set_FAT |
||
1191 | mov [f_del],0 |
||
1192 | mov eax,edx ; clear rest of chain |
||
1193 | |||
1194 | truncate_clear_chain: |
||
1195 | call clear_cluster_chain |
||
1196 | |||
1197 | truncate_eof: |
||
1198 | popad |
||
1199 | call update_disk ; write all of cache and fat to hd |
||
1200 | mov [hd1_status],0 |
||
1201 | xor ebx,ebx |
||
1202 | xor eax,eax |
||
1203 | ret |
||
1204 | |||
1205 | |||
1206 | find_filepos: |
||
1207 | ;----------------------------------------------------- |
||
1208 | ; input : eax = first cluster |
||
1209 | ; edi = bytes to skip over (start position) |
||
1210 | ; output : if CARRY=0 file position found |
||
1211 | ; if CARRY=1 end of file found |
||
1212 | ; eax = current file sector |
||
1213 | ; ebx = last cluster |
||
1214 | ; ecx = sector count in last cluster |
||
1215 | ; edi = bytes to skip over (sector position) |
||
1216 | ;----------------------------------------------------- |
||
1217 | push esi |
||
1218 | mov ecx,[SECTORS_PER_CLUSTER] |
||
1219 | imul esi,ecx,512 ; esi = cluster size in bytes |
||
1220 | mov ebx,eax |
||
1221 | |||
1222 | filepos_new_cluster: |
||
1223 | cmp eax,2 ; incorrect fat chain? |
||
1224 | jb filepos_eof ; yes |
||
1225 | cmp eax,[fatRESERVED] ; is it end of file? |
||
1226 | jnb filepos_eof ; yes |
||
1227 | |||
1228 | mov ebx,eax |
||
1229 | cmp edi,esi ; skip over full cluster? |
||
1230 | jb filepos_cluster_ok ; no |
||
1231 | |||
1232 | sub edi,esi |
||
1233 | call get_FAT ; get next cluster |
||
1234 | jmp filepos_new_cluster |
||
1235 | |||
1236 | filepos_cluster_ok: |
||
1237 | sub eax,2 |
||
1238 | imul eax,ecx |
||
1239 | add eax,[DATA_START] |
||
1240 | |||
1241 | filepos_new_sector: |
||
1242 | cmp edi,512 ; skip over full sector? |
||
1243 | jb filepos_sector_ok ; no |
||
1244 | sub edi,512 |
||
1245 | inc eax |
||
1246 | dec ecx |
||
1247 | jnz filepos_new_sector |
||
1248 | |||
1249 | filepos_eof: |
||
1250 | pop esi |
||
1251 | stc |
||
1252 | ret |
||
1253 | |||
1254 | filepos_sector_ok: |
||
1255 | pop esi |
||
1256 | clc |
||
1257 | ret |
||
1258 | |||
1259 | |||
1260 | file_write: |
||
1261 | ;-------------------------------------------------------------------------- |
||
1262 | ; INPUT : user-reg register-in-this meaning symbol-in-this-routine |
||
1263 | ; |
||
1264 | ; EAX EDI system call to write / |
||
1265 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
||
1266 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
||
1267 | ; ECX EBX (PAR2) file size PAR2 |
||
1268 | ; ESI EDX (PAR3) pointer to path PAR3 |
||
1269 | ; |
||
1270 | ; output : eax = 0 - ok |
||
1271 | ; 3 - unknown FS |
||
1272 | ; 5 - file not found |
||
1273 | ; 8 - disk full |
||
1274 | ; 10 - access denied |
||
1275 | ;-------------------------------------------------------------------------- |
||
1276 | cmp [fat_type],0 |
||
1277 | jnz fat_ok_for_writing |
||
1278 | mov eax,ERROR_UNKNOWN_FS |
||
1279 | ret |
||
1280 | |||
1281 | fat_ok_for_writing: |
||
1282 | ; call reserve_hd1 |
||
1283 | |||
1284 | pushad |
||
1285 | |||
1286 | xor edi,edi ; don't allow directory remove |
||
1287 | call file_delete ; try to delete the file first |
||
1288 | test eax,eax |
||
1289 | jz old_deleted ; deleted ok |
||
1290 | cmp eax,ERROR_FILE_NOT_FOUND |
||
1291 | jnz exit_write_access ; it exist but can't delete |
||
1292 | |||
1293 | old_deleted: |
||
1294 | mov ebx,PUSHAD_EDX |
||
1295 | call get_cluster_of_a_path |
||
1296 | jnc found_directory_for_writing |
||
1297 | |||
1298 | exit_writing_with_error: |
||
1299 | popad |
||
1300 | call update_disk ; write all of cache and fat to hd |
||
1301 | mov [hd1_status],0 |
||
1302 | mov eax,ERROR_FILE_NOT_FOUND |
||
1303 | ret |
||
1304 | |||
1305 | exit_writing_disk_full_clear: |
||
1306 | mov eax,[sector_tmp] |
||
1307 | mov ebx,buffer |
||
1308 | call hd_read ; read directory sector |
||
1309 | mov edx,[entry_pos] |
||
1310 | mov byte [edx],0xe5 ; mark as deleted |
||
1311 | call hd_write |
||
1312 | mov eax,[edx+20-2] ; FAT entry |
||
1313 | mov ax,[edx+26] |
||
1314 | and eax,[fatMASK] |
||
1315 | call clear_cluster_chain |
||
1316 | |||
1317 | exit_writing_disk_full: |
||
1318 | popad |
||
1319 | call update_disk ; write all of cache and fat to hd |
||
1320 | mov [hd1_status],0 |
||
1321 | mov eax,ERROR_DISK_FULL |
||
1322 | ret |
||
1323 | |||
1324 | exit_write_access: |
||
1325 | popad |
||
1326 | call update_disk ; write all of cache and fat to hd |
||
1327 | mov [hd1_status],0 |
||
1328 | mov eax,ERROR_ACCESS_DENIED |
||
1329 | ret |
||
1330 | |||
1331 | found_directory_for_writing: |
||
1332 | call analyze_directory_to_write |
||
1333 | jc exit_writing_disk_full |
||
1334 | |||
1335 | mov [sector_tmp],eax |
||
1336 | mov [entry_pos],ebx |
||
1337 | push eax ; save directory sector |
||
1338 | mov eax,2 |
||
1339 | call get_free_FAT |
||
1340 | mov [cluster],eax ; first free cluster |
||
1341 | pop eax |
||
1342 | jc exit_writing_disk_full |
||
1343 | |||
1344 | mov esi,PUSHAD_EAX ; file name |
||
1345 | mov edi,ebx ; pointer in buffer |
||
1346 | mov ecx,11 |
||
1347 | cld |
||
1348 | rep movsb |
||
1349 | |||
1350 | mov esi,PUSHAD_EBX ; file size (bytes left) |
||
1351 | mov [ebx+28],esi ; file size |
||
1352 | mov ecx,[cluster] |
||
1353 | mov [ebx+26],cx ; 16 bits low of cluster |
||
1354 | shr ecx,16 |
||
1355 | mov [ebx+20],cx ; 16 bits high of cluster (=0 fat16) |
||
1356 | mov byte [ebx+11],0x20 ; attribute = archive |
||
1357 | |||
1358 | call set_current_time_for_entry |
||
1359 | |||
1360 | mov ebx,buffer ; save the directory name,length,cluster |
||
1361 | call hd_write |
||
1362 | |||
1363 | imul edi,[SECTORS_PER_CLUSTER],512 ; edi = cluster size in bytes |
||
1364 | xor ecx,ecx ; cluster count |
||
1365 | mov ebx,PUSHAD_ECX ; ebx = buffer |
||
1366 | |||
1367 | hd_new_block_write: |
||
1368 | |||
1369 | mov eax,[cluster] ; eax = block |
||
1370 | call set_data_cluster |
||
1371 | |||
1372 | sub esi,edi ; sub wrote bytes |
||
1373 | jbe file_saved_OK ; end if all done |
||
1374 | add ebx,edi ; update buffer position |
||
1375 | |||
1376 | inc eax |
||
1377 | call get_free_FAT ; next free in FAT |
||
1378 | jc exit_writing_disk_full_clear |
||
1379 | |||
1380 | mov edx,eax |
||
1381 | xchg eax,[cluster] ; get old cluster and save new cluster |
||
1382 | call set_FAT ; add it in cluster chain |
||
1383 | dec ecx ; update cluster count |
||
1384 | jmp hd_new_block_write |
||
1385 | |||
1386 | file_saved_OK: |
||
1387 | |||
1388 | mov edx,[fatEND] ; new end for cluster chain |
||
1389 | call set_FAT |
||
1390 | dec ecx ; update cluster count |
||
1391 | |||
1392 | call add_disk_free_space ; remove clusters from free disk space |
||
1393 | |||
1394 | popad |
||
1395 | call update_disk ; write all of cache and fat to hd |
||
1396 | mov [hd1_status],0 |
||
1397 | xor eax,eax |
||
1398 | ret |
||
1399 | |||
1400 | |||
1401 | file_read: |
||
1402 | ;-------------------------------------------------------------------------- |
||
1403 | ; INPUT : user-register register-in-this meaning symbol-in-this |
||
1404 | ; |
||
1405 | ; EAX EDI system call to write / |
||
1406 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
||
1407 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
||
1408 | ; ECX EBX (PAR2) vt file blocks to read PAR2 |
||
1409 | ; ESI EDX (PAR3) pointer to path PAR3 |
||
1410 | ; EDI ESI vt first 512 block to read |
||
1411 | ; EDI if 0 - read root |
||
1412 | ; |
||
1413 | ; output : eax = 0 - ok |
||
1414 | ; 3 - unknown FS |
||
1415 | ; 5 - file not found |
||
1416 | ; 6 - end of file |
||
1417 | ; 9 - fat table corrupted |
||
1418 | ; ebx = size of file/directory |
||
1419 | ;-------------------------------------------------------------------------- |
||
1420 | cmp [fat_type],0 |
||
1421 | jnz fat_ok_for_reading |
||
1422 | xor ebx,ebx |
||
1423 | mov eax,ERROR_UNKNOWN_FS |
||
63 | halyavin | 1424 | mov [hd1_status], ebx |
1 | ha | 1425 | ret |
1426 | |||
1427 | fat_ok_for_reading: |
||
1428 | ; call reserve_hd1 |
||
1429 | |||
1430 | pushad |
||
1431 | |||
1432 | mov ebx,edx |
||
1433 | call get_cluster_of_a_path |
||
1434 | jc file_to_read_not_found |
||
1435 | |||
1436 | test edi,edi ; read rootdir |
||
1437 | jne no_read_root |
||
1438 | |||
1439 | xor eax,eax |
||
1440 | call get_dir_size ; return rootdir size |
||
1441 | mov [file_size],eax |
||
1442 | mov eax,[ROOT_CLUSTER] |
||
1443 | jmp file_read_start |
||
1444 | |||
1445 | no_read_root: |
||
1446 | mov ebx,PUSHAD_EAX ; file name |
||
1447 | call analyze_directory |
||
1448 | jc file_to_read_not_found |
||
1449 | |||
1450 | mov eax,[ebx+28] ; file size |
||
1451 | test byte [ebx+11],0x10 ; is it directory? |
||
1452 | jz read_set_size ; no |
||
1453 | |||
1454 | mov eax,[ebx+20-2] ; FAT entry |
||
1455 | mov ax,[ebx+26] |
||
1456 | and eax,[fatMASK] |
||
1457 | call get_dir_size |
||
1458 | |||
1459 | read_set_size: |
||
1460 | mov [file_size],eax |
||
1461 | |||
1462 | mov eax,[ebx+20-2] ; FAT entry |
||
1463 | mov ax,[ebx+26] |
||
1464 | and eax,[fatMASK] |
||
1465 | |||
1466 | file_read_start: |
||
1467 | mov ebx,PUSHAD_ECX ; pointer to buffer |
||
1468 | mov edx,PUSHAD_EBX ; file blocks to read |
||
1469 | mov esi,PUSHAD_ESI ; first 512 block to read |
||
1470 | |||
1471 | file_read_new_cluster: |
||
1472 | call get_data_cluster |
||
1473 | jc file_read_eof ; end of file or cluster out of range |
||
1474 | |||
1475 | test edx,edx ; is all read? |
||
1476 | je file_read_OK ; yes |
||
1477 | |||
1478 | call get_FAT ; get next cluster |
||
1479 | cmp eax,[fatRESERVED] ; end of file |
||
1480 | jnb file_read_eof |
||
1481 | cmp eax,2 ; incorrect fat chain |
||
1482 | jnb file_read_new_cluster |
||
1483 | |||
1484 | popad |
||
1485 | mov [hd1_status],0 |
||
1486 | mov ebx,[file_size] |
||
1487 | mov eax,ERROR_FAT_TABLE |
||
1488 | ret |
||
1489 | |||
1490 | file_read_eof: |
||
1491 | popad |
||
1492 | mov [hd1_status],0 |
||
1493 | mov ebx,[file_size] |
||
1494 | mov eax,ERROR_END_OF_FILE |
||
1495 | ret |
||
1496 | |||
1497 | file_read_OK: |
||
1498 | popad |
||
1499 | mov [hd1_status],0 |
||
1500 | mov ebx,[file_size] |
||
1501 | xor eax,eax |
||
1502 | ret |
||
1503 | |||
1504 | file_to_read_not_found: |
||
1505 | popad |
||
1506 | mov [hd1_status],0 |
||
1507 | xor ebx,ebx |
||
1508 | mov eax,ERROR_FILE_NOT_FOUND |
||
1509 | ret |
||
1510 | |||
1511 | |||
1512 | get_dir_size: |
||
1513 | ;----------------------------------------------------- |
||
1514 | ; input : eax = first cluster (0=rootdir) |
||
1515 | ; output : eax = directory size in bytes |
||
1516 | ;----------------------------------------------------- |
||
1517 | push edx |
||
1518 | xor edx,edx ; count of directory clusters |
||
1519 | test eax,eax |
||
1520 | jnz dir_size_next |
||
1521 | |||
1522 | mov eax,[ROOT_SECTORS] |
||
1523 | shl eax,9 ; fat16 rootdir size in bytes |
||
1524 | cmp [fat_type],16 |
||
1525 | je dir_size_ret |
||
1526 | mov eax,[ROOT_CLUSTER] |
||
1527 | |||
1528 | dir_size_next: |
||
1529 | cmp eax,2 ; incorrect fat chain |
||
1530 | jb dir_size_end |
||
1531 | cmp eax,[fatRESERVED] ; end of directory |
||
1532 | ja dir_size_end |
||
1533 | call get_FAT ; get next cluster |
||
1534 | inc edx |
||
1535 | jmp dir_size_next |
||
1536 | |||
1537 | dir_size_end: |
||
1538 | imul eax,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
||
1539 | imul eax,edx |
||
1540 | |||
1541 | dir_size_ret: |
||
1542 | pop edx |
||
1543 | ret |
||
1544 | |||
1545 | |||
1546 | file_delete: |
||
1547 | ;----------------------------------------------------- |
||
1548 | ; input : eax = file/directory name |
||
1549 | ; edx = path |
||
1550 | ; edi = 1 - allow directory remove else don't remove directory |
||
1551 | ; output : eax = 0 - ok |
||
1552 | ; 3 - unknown FS |
||
1553 | ; 5 - file not found |
||
1554 | ; 10 - access denied |
||
1555 | ;----------------------------------------------------- |
||
1556 | cmp [fat_type],0 |
||
1557 | jnz file_del_fat_ok |
||
1558 | mov eax,ERROR_UNKNOWN_FS |
||
1559 | ret |
||
1560 | |||
1561 | file_del_fat_ok: |
||
1562 | pushad |
||
1563 | |||
1564 | mov ebx,edx |
||
1565 | call get_cluster_of_a_path |
||
1566 | jc file_to_delete_not_found |
||
1567 | |||
1568 | mov ebx,PUSHAD_EAX ; file/directory name |
||
1569 | call analyze_directory |
||
1570 | jc file_to_delete_not_found |
||
1571 | |||
1572 | test byte [ebx+11],0x10 ; is it directory? |
||
1573 | jz delete_notdir ; no. it's file |
||
1574 | cmp edi,1 ; allow directory remove |
||
1575 | jnz delete_no_access ; no |
||
1576 | |||
1577 | push eax ; save directory sector |
||
1578 | mov eax,[ebx+20-2] ; first cluster of file |
||
1579 | mov ax,[ebx+26] ; 0 length files start cluster = 0 |
||
1580 | and eax,[fatMASK] |
||
1581 | xor ebp,ebp ; counter for directory deepnes |
||
1582 | call clear_directory |
||
1583 | pop eax |
||
1584 | jc delete_no_access |
||
1585 | |||
1586 | push ebx ; save directory pointer in buffer |
||
1587 | mov ebx,buffer |
||
1588 | call hd_read ; read directory sector |
||
1589 | pop ebx |
||
1590 | |||
1591 | delete_notdir: |
||
1592 | call delete_entry_name |
||
1593 | mov eax,ecx ; first cluster of file |
||
1594 | call clear_cluster_chain |
||
1595 | popad |
||
1596 | xor eax,eax |
||
1597 | ret |
||
1598 | |||
1599 | delete_no_access: |
||
1600 | popad |
||
1601 | mov eax,ERROR_ACCESS_DENIED |
||
1602 | ret |
||
1603 | |||
1604 | file_to_delete_not_found: |
||
1605 | popad |
||
1606 | mov eax,ERROR_FILE_NOT_FOUND |
||
1607 | ret |
||
1608 | |||
1609 | |||
1610 | clear_cluster_chain: |
||
1611 | ;----------------------------------------------------- |
||
1612 | ; input : eax = first cluster |
||
1613 | ;----------------------------------------------------- |
||
1614 | push eax ecx edx |
||
1615 | xor ecx,ecx ; cluster count |
||
1616 | mov [f_del],1 ; delete on |
||
1617 | |||
1618 | clean_new_chain: |
||
1619 | cmp eax,[LAST_CLUSTER] ; end of file |
||
1620 | ja delete_OK |
||
1621 | cmp eax,2 ; unfinished fat chain or zero length file |
||
1622 | jb delete_OK |
||
1623 | cmp eax,[ROOT_CLUSTER] ; don't remove root cluster |
||
1624 | jz delete_OK |
||
1625 | |||
1626 | xor edx,edx |
||
1627 | call set_FAT ; clear fat entry |
||
1628 | inc ecx ; update cluster count |
||
1629 | mov eax,edx ; old cluster |
||
1630 | jmp clean_new_chain |
||
1631 | |||
1632 | delete_OK: |
||
1633 | call add_disk_free_space ; add clusters to free disk space |
||
1634 | mov [f_del],0 |
||
1635 | pop edx ecx eax |
||
1636 | ret |
||
1637 | |||
1638 | |||
1639 | clear_directory: |
||
1640 | ;----------------------------------------------------- |
||
1641 | ; input : eax = directory cluster |
||
1642 | ; ebp = directory deepnes |
||
1643 | ; Note : use recursive call |
||
1644 | ;----------------------------------------------------- |
||
1645 | pushad |
||
1646 | inc ebp |
||
1647 | cmp ebp,64 ; if over 63 directory deep |
||
1648 | jnb clear_error ; something must be wrong |
||
1649 | |||
1650 | clear_new_cluster: |
||
1651 | cmp eax,[LAST_CLUSTER] |
||
1652 | ja clear_end |
||
1653 | cmp eax,[ROOT_CLUSTER] ; don't remove root cluster |
||
1654 | jz clear_end |
||
1655 | mov esi,eax ; esi = current directory cluster |
||
1656 | sub eax,2 |
||
1657 | jb clear_end |
||
1658 | mov ecx,[SECTORS_PER_CLUSTER] |
||
1659 | imul eax,ecx |
||
1660 | add eax,[DATA_START] |
||
1661 | |||
1662 | clear_new_sector: |
||
1663 | mov edi,eax ; edi = current directory sector |
||
1664 | mov ebx,deltree_buffer |
||
1665 | call hd_read |
||
1666 | mov edx,512/32 ; count of dir entrys per sector = 16 |
||
1667 | |||
1668 | clear_analyze: |
||
1669 | mov al,[ebx+11] ; file attribute |
||
1670 | and al,0xf |
||
1671 | cmp al,0xf |
||
1672 | je clear_long_filename |
||
1673 | |||
1674 | cmp byte [ebx],'.' ; parent or current directory |
||
1675 | je clear_next_entry |
||
1676 | cmp byte [ebx],0xe5 ; deleted |
||
1677 | je clear_next_entry |
||
1678 | cmp byte [ebx],0 ; empty |
||
1679 | je clear_write_last |
||
1680 | ;je clear_next_entry |
||
1681 | |||
1682 | mov eax,[ebx+20-2] ; first cluster of entry |
||
1683 | mov ax,[ebx+26] |
||
1684 | and eax,[fatMASK] |
||
1685 | |||
1686 | test byte [ebx+11],0x10 ; is it directory? |
||
1687 | jz clear_file ; no |
||
1688 | |||
1689 | push eax ebx |
||
1690 | mov eax,edi |
||
1691 | mov ebx,deltree_buffer ; save buffer over recursive call |
||
1692 | call hd_write ; write directory sector to disk |
||
1693 | pop ebx eax |
||
1694 | |||
1695 | call clear_directory ; recursive call !!! |
||
1696 | jc clear_error ; exit if error found |
||
1697 | |||
1698 | push eax ebx |
||
1699 | mov eax,edi |
||
1700 | mov ebx,deltree_buffer |
||
1701 | call hd_read ; read directory sector again |
||
1702 | pop ebx eax |
||
1703 | |||
1704 | clear_file: |
||
1705 | call clear_cluster_chain |
||
1706 | |||
1707 | clear_long_filename: |
||
1708 | mov byte [ebx],0xe5 |
||
1709 | |||
1710 | clear_next_entry: |
||
1711 | add ebx,32 ; position of next dir entry |
||
1712 | dec edx |
||
1713 | jnz clear_analyze |
||
1714 | |||
1715 | mov eax,edi |
||
1716 | mov ebx,deltree_buffer |
||
1717 | call hd_write ; write directory sector to disk |
||
1718 | |||
1719 | inc eax ; next sector |
||
1720 | dec ecx |
||
1721 | jnz clear_new_sector |
||
1722 | |||
1723 | mov eax,esi |
||
1724 | call get_FAT ; get next cluster |
||
1725 | jmp clear_new_cluster ; clear it |
||
1726 | |||
1727 | clear_write_last: |
||
1728 | mov eax,edi |
||
1729 | mov ebx,deltree_buffer |
||
1730 | call hd_write ; write directory sector to disk |
||
1731 | |||
1732 | clear_end: |
||
1733 | popad |
||
1734 | clc |
||
1735 | ret |
||
1736 | |||
1737 | clear_error: |
||
1738 | popad |
||
1739 | stc |
||
1740 | ret |
||
1741 | |||
1742 | |||
1743 | delete_entry_name: |
||
1744 | ;----------------------------------------------------- |
||
1745 | ; input : eax = directory sector |
||
1746 | ; ebx = directory pointer in buffer |
||
1747 | ; longname_sec = 2 previous directory sectors |
||
1748 | ; output : ecx = first cluster |
||
1749 | ; change : eax,ebx,edx |
||
1750 | ;----------------------------------------------------- |
||
1751 | mov byte [ebx],0xe5 |
||
1752 | mov ecx,[ebx+20-2] ; first cluster of file |
||
1753 | mov cx,[ebx+26] ; 0 length files start cluster = 0 |
||
1754 | and ecx,[fatMASK] |
||
1755 | |||
1756 | delete_empty: |
||
1757 | sub ebx,32 |
||
1758 | cmp ebx,buffer |
||
1759 | jnb delete_test_long |
||
1760 | |||
1761 | mov ebx,buffer |
||
1762 | call hd_write ; write directory sector back |
||
1763 | xor eax,eax |
||
1764 | xchg eax,[longname_sec2] |
||
1765 | xchg eax,[longname_sec1] |
||
1766 | test eax,eax ; is there previous directory sector? |
||
1767 | jz delete_name_end ; no |
||
1768 | |||
1769 | mov ebx,buffer |
||
1770 | call hd_read ; read previous sector |
||
1771 | mov ebx,buffer+0x1e0 ; start from last entry |
||
1772 | |||
1773 | delete_test_long: |
||
1774 | mov dh,[ebx+11] ; file attribute |
||
1775 | and dh,0xf |
||
1776 | cmp dh,0xf |
||
1777 | jne delete_write_buffer |
||
1778 | |||
1779 | cmp byte [ebx],0x40 ; end of long dir entry? |
||
1780 | mov byte [ebx],0xe5 |
||
1781 | jb delete_empty |
||
1782 | |||
1783 | delete_write_buffer: |
||
1784 | mov ebx,buffer |
||
1785 | call hd_write ; write directory sector back |
||
1786 | |||
1787 | delete_name_end: |
||
1788 | ret |
||
1789 | |||
1790 | |||
1791 | rename: |
||
1792 | ;----------------------------------------------------------- |
||
1793 | ; input : eax = source directory name |
||
1794 | ; edx = source path |
||
1795 | ; ebx = dest directory name |
||
1796 | ; edi = dest path |
||
1797 | ; output : eax = 0 - ok |
||
1798 | ; 3 - unknown FS |
||
1799 | ; 5 - file not found |
||
1800 | ; 8 - disk full |
||
1801 | ; 10 - access denied |
||
1802 | ;----------------------------------------------------------- |
||
1803 | cmp [fat_type],0 |
||
1804 | jnz fat_ok_for_rename |
||
1805 | mov eax,ERROR_UNKNOWN_FS |
||
1806 | ret |
||
1807 | |||
1808 | fat_ok_for_rename: |
||
1809 | ; call reserve_hd1 |
||
1810 | |||
1811 | pushad |
||
1812 | |||
1813 | mov ebx,edx ; source path |
||
1814 | call get_cluster_of_a_path |
||
1815 | jc rename_entry_not_found |
||
1816 | |||
1817 | mov ebx,PUSHAD_EAX ; source directory name |
||
1818 | call analyze_directory |
||
1819 | jc rename_entry_not_found |
||
1820 | |||
1821 | mov [sector_tmp],eax ; save source sector |
||
1822 | mov [entry_pos],ebx |
||
1823 | mov esi,ebx |
||
1824 | mov edi,dir_entry |
||
1825 | mov ecx,32/4 |
||
1826 | cld |
||
1827 | rep movsd ; save entry |
||
1828 | |||
1829 | mov ebx,PUSHAD_EDI ; dest path |
||
1830 | call get_cluster_of_a_path |
||
1831 | jc rename_entry_not_found |
||
1832 | |||
1833 | mov edx,eax ; save dest directory cluster |
||
1834 | mov ebx,PUSHAD_EBX ; dest directory name |
||
1835 | push [longname_sec1] |
||
1836 | push [longname_sec2] |
||
1837 | call analyze_directory ; check if entry already exist |
||
1838 | pop [longname_sec2] |
||
1839 | pop [longname_sec1] |
||
1840 | jnc rename_entry_already_exist |
||
1841 | |||
1842 | mov eax,edx |
||
1843 | call analyze_directory_to_write |
||
1844 | jc rename_disk_full |
||
1845 | |||
1846 | mov esi,dir_entry |
||
1847 | mov edi,ebx |
||
1848 | mov ecx,32/4 |
||
1849 | cld |
||
1850 | rep movsd ; copy entry |
||
1851 | mov esi,PUSHAD_EBX ; dest directory name |
||
1852 | mov edi,ebx |
||
1853 | mov ecx,11 |
||
1854 | rep movsb ; copy name |
||
1855 | |||
1856 | mov ebx,buffer ; save the directory name,length,cluster |
||
1857 | call hd_write |
||
1858 | |||
1859 | test byte [dir_entry+11],0x10 ; is it directory? |
||
1860 | jz rename_not_dir ; no |
||
1861 | mov eax,[dir_entry+20-2] ; FAT entry |
||
1862 | mov ax,[dir_entry+26] |
||
1863 | and eax,[fatMASK] |
||
1864 | call change_2dot_cluster |
||
1865 | |||
1866 | rename_not_dir: |
||
1867 | mov eax,[sector_tmp] |
||
1868 | mov ebx,buffer |
||
1869 | call hd_read ; read source directory sector |
||
1870 | |||
1871 | mov ebx,[entry_pos] |
||
1872 | call delete_entry_name |
||
1873 | |||
1874 | popad |
||
1875 | call update_disk ; write all of cache and fat to hd |
||
1876 | mov [hd1_status],0 |
||
1877 | xor eax,eax |
||
1878 | ret |
||
1879 | |||
1880 | rename_entry_not_found: |
||
1881 | popad |
||
1882 | mov [hd1_status],0 |
||
1883 | mov eax,ERROR_FILE_NOT_FOUND |
||
1884 | ret |
||
1885 | |||
1886 | rename_entry_already_exist: |
||
1887 | popad |
||
1888 | mov [hd1_status],0 |
||
1889 | mov eax,ERROR_ACCESS_DENIED |
||
1890 | ret |
||
1891 | |||
1892 | rename_disk_full: |
||
1893 | popad |
||
1894 | mov [hd1_status],0 |
||
1895 | mov eax,ERROR_DISK_FULL |
||
1896 | ret |
||
1897 | |||
1898 | |||
1899 | change_2dot_cluster: |
||
1900 | ;----------------------------------------------------------- |
||
1901 | ; input : eax = directory cluster |
||
1902 | ; edx = value to save |
||
1903 | ; change : eax,ebx,edx |
||
1904 | ;----------------------------------------------------------- |
||
1905 | cmp eax,[LAST_CLUSTER] |
||
1906 | ja not_2dot ; too big cluster number, something is wrong |
||
1907 | sub eax,2 |
||
1908 | jb not_2dot |
||
1909 | |||
1910 | imul eax,[SECTORS_PER_CLUSTER] |
||
1911 | add eax,[DATA_START] |
||
1912 | mov ebx,buffer |
||
1913 | call hd_read |
||
1914 | |||
1915 | cmp dword [ebx+32],'.. ' |
||
1916 | jnz not_2dot |
||
1917 | |||
1918 | cmp edx,[ROOT_CLUSTER] ; is rootdir cluster? |
||
1919 | jne not_2dot_root |
||
1920 | xor edx,edx ; yes. set it zero |
||
1921 | |||
1922 | not_2dot_root: |
||
1923 | mov [ebx+32+26],dx ; 16 bits low of cluster |
||
1924 | shr edx,16 |
||
1925 | mov [ebx+32+20],dx ; 16 bits high of cluster (=0 fat16) |
||
1926 | call hd_write |
||
1927 | |||
1928 | not_2dot: |
||
1929 | ret |
||
1930 | |||
1931 | |||
1932 | get_filesize: |
||
1933 | ;----------------------------------------------------------- |
||
1934 | ; input : eax = file name |
||
1935 | ; edx = path |
||
1936 | ; edi = if 0 - read rootdir else normal dir/file size |
||
1937 | ; output : eax = 0 - ok |
||
1938 | ; 3 - unknown FS |
||
1939 | ; 5 - file not found |
||
1940 | ; ebx = file size |
||
1941 | ;----------------------------------------------------------- |
||
1942 | cmp [fat_type],0 |
||
1943 | jnz get_filesize_fat_ok |
||
1944 | xor ebx,ebx |
||
1945 | mov eax,ERROR_UNKNOWN_FS |
||
1946 | ret |
||
1947 | |||
1948 | get_filesize_fat_ok: |
||
1949 | ; call reserve_hd1 |
||
1950 | |||
1951 | pushad |
||
1952 | xor eax,eax |
||
1953 | test edi,edi ; is read rootdir? |
||
1954 | je get_filesize_dirsize ; yes |
||
1955 | |||
1956 | get_filesize_no_root: |
||
1957 | mov ebx,edx |
||
1958 | call get_cluster_of_a_path |
||
1959 | jc get_filesize_not_found |
||
1960 | |||
1961 | mov ebx,PUSHAD_EAX ; file name |
||
1962 | call analyze_directory |
||
1963 | jc get_filesize_not_found |
||
1964 | |||
1965 | mov eax,[ebx+28] ; file size |
||
1966 | test byte [ebx+11],0x10 ; is it directory? |
||
1967 | jz get_filesize_set_size ; no |
||
1968 | |||
1969 | mov eax,[ebx+20-2] ; FAT entry |
||
1970 | mov ax,[ebx+26] |
||
1971 | and eax,[fatMASK] |
||
1972 | |||
1973 | get_filesize_dirsize: |
||
1974 | call get_dir_size |
||
1975 | |||
1976 | get_filesize_set_size: |
||
1977 | mov PUSHAD_EBX,eax |
||
1978 | popad |
||
1979 | mov [hd1_status],0 |
||
1980 | xor eax,eax |
||
1981 | ret |
||
1982 | |||
1983 | get_filesize_not_found: |
||
1984 | popad |
||
1985 | mov [hd1_status],0 |
||
1986 | xor ebx,ebx |
||
1987 | mov eax,ERROR_FILE_NOT_FOUND |
||
1988 | ret |
||
1989 | |||
1990 | |||
1991 | get_fileattr: |
||
1992 | ;----------------------------------------------------------- |
||
1993 | ; input : eax = file name |
||
1994 | ; edx = path |
||
1995 | ; output : eax = 0 - ok |
||
1996 | ; 3 - unknown FS |
||
1997 | ; 5 - file not found |
||
1998 | ; ebx = file attribute |
||
1999 | ;----------------------------------------------------------- |
||
2000 | cmp [fat_type],0 |
||
2001 | jnz get_fileattr_fat_ok |
||
2002 | xor ebx,ebx |
||
2003 | mov eax,ERROR_UNKNOWN_FS |
||
2004 | ret |
||
2005 | |||
2006 | get_fileattr_fat_ok: |
||
2007 | ; call reserve_hd1 |
||
2008 | |||
2009 | pushad |
||
2010 | mov ebx,edx |
||
2011 | call get_cluster_of_a_path |
||
2012 | jc get_fileattr_not_found |
||
2013 | |||
2014 | mov ebx,PUSHAD_EAX ; file name |
||
2015 | call analyze_directory |
||
2016 | jc get_fileattr_not_found |
||
2017 | |||
2018 | movzx eax,byte [ebx+11] ; file attribute |
||
2019 | mov PUSHAD_EBX,eax |
||
2020 | popad |
||
2021 | mov [hd1_status],0 |
||
2022 | xor eax,eax |
||
2023 | ret |
||
2024 | |||
2025 | get_fileattr_not_found: |
||
2026 | popad |
||
2027 | mov [hd1_status],0 |
||
2028 | xor ebx,ebx |
||
2029 | mov eax,ERROR_FILE_NOT_FOUND |
||
2030 | ret |
||
2031 | |||
2032 | |||
2033 | get_filedate: |
||
2034 | ;----------------------------------------------------------- |
||
2035 | ; input : eax = file name |
||
2036 | ; edx = path |
||
2037 | ; output : eax = 0 - ok |
||
2038 | ; 3 - unknown FS |
||
2039 | ; 5 - file not found |
||
2040 | ; ebx = file date/time |
||
2041 | ; bits 31..25 = year-1980 |
||
2042 | ; bits 24..21 = month |
||
2043 | ; bits 20..16 = day |
||
2044 | ; bits 15..11 = hour |
||
2045 | ; bits 10..5 = minute |
||
2046 | ; bits 4..0 = second/2 |
||
2047 | ;----------------------------------------------------------- |
||
2048 | cmp [fat_type],0 |
||
2049 | jnz get_filedate_fat_ok |
||
2050 | xor ebx,ebx |
||
2051 | mov eax,ERROR_UNKNOWN_FS |
||
2052 | ret |
||
2053 | |||
2054 | get_filedate_fat_ok: |
||
2055 | ; call reserve_hd1 |
||
2056 | |||
2057 | pushad |
||
2058 | mov ebx,edx |
||
2059 | call get_cluster_of_a_path |
||
2060 | jc get_filedate_not_found |
||
2061 | |||
2062 | mov ebx,PUSHAD_EAX ; file name |
||
2063 | call analyze_directory |
||
2064 | jc get_filedate_not_found |
||
2065 | |||
2066 | mov eax,[ebx+22] ; file date/time |
||
2067 | mov PUSHAD_EBX,eax |
||
2068 | popad |
||
2069 | mov [hd1_status],0 |
||
2070 | xor eax,eax |
||
2071 | ret |
||
2072 | |||
2073 | get_filedate_not_found: |
||
2074 | popad |
||
2075 | mov [hd1_status],0 |
||
2076 | xor ebx,ebx |
||
2077 | mov eax,ERROR_FILE_NOT_FOUND |
||
2078 | ret |
||
2079 | |||
2080 | |||
2081 | get_hd_info: |
||
2082 | ;----------------------------------------------------------- |
||
2083 | ; output : eax = 0 - ok |
||
2084 | ; 3 - unknown FS |
||
2085 | ; edx = cluster size in bytes |
||
2086 | ; ebx = total clusters on disk |
||
2087 | ; ecx = free clusters on disk |
||
2088 | ;----------------------------------------------------------- |
||
2089 | cmp [fat_type],0 |
||
2090 | jnz info_fat_ok |
||
2091 | xor edx,edx |
||
2092 | xor ebx,ebx |
||
2093 | xor ecx,ecx |
||
2094 | mov eax,ERROR_UNKNOWN_FS |
||
2095 | ret |
||
2096 | |||
2097 | info_fat_ok: |
||
2098 | ; call reserve_hd1 |
||
2099 | |||
2100 | xor ecx,ecx ; count of free clusters |
||
2101 | mov eax,2 |
||
2102 | mov ebx,[LAST_CLUSTER] |
||
2103 | |||
2104 | info_cluster: |
||
2105 | push eax |
||
2106 | call get_FAT ; get cluster info |
||
2107 | test eax,eax ; is it free? |
||
2108 | jnz info_used ; no |
||
2109 | inc ecx |
||
2110 | |||
2111 | info_used: |
||
2112 | pop eax |
||
2113 | inc eax |
||
2114 | cmp eax,ebx ; is above last cluster? |
||
2115 | jbe info_cluster ; no. test next cluster |
||
2116 | |||
2117 | dec ebx ; cluster count |
||
2118 | imul edx,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
||
2119 | mov [hd1_status],0 |
||
2120 | xor eax,eax |
||
2121 | ret |
||
2122 | |||
2123 | |||
2124 | update_disk: |
||
2125 | ;----------------------------------------------------------- |
||
2126 | ; write changed fat and cache to disk |
||
2127 | ;----------------------------------------------------------- |
||
2128 | cmp [fat_change],0 ; is fat changed? |
||
2129 | je upd_no_change |
||
2130 | |||
2131 | call write_fat_sector |
||
2132 | |||
2133 | upd_no_change: |
||
2134 | |||
2135 | call write_cache |
||
2136 | ret |
||
2137 | |||
2138 | |||
2139 | ;************************************************************************** |
||
2140 | ; |
||
2141 | ; 0x600008 - first entry in cache list |
||
2142 | ; |
||
2143 | ; +0 - lba sector |
||
2144 | ; +4 - state of cache sector |
||
2145 | ; 0 = empty |
||
2146 | ; 1 = used for read ( same as in hd ) |
||
2147 | ; 2 = used for write ( differs from hd ) |
||
2148 | ; |
||
2149 | ; +65536 - cache entries |
||
2150 | ; |
||
2151 | ;************************************************************************** |
||
2152 | |||
2153 | |||
2154 | hd_read: |
||
2155 | ;----------------------------------------------------------- |
||
2156 | ; input : eax = block to read |
||
2157 | ; ebx = destination |
||
2158 | ;----------------------------------------------------------- |
||
2159 | push ecx esi edi ; scan cache |
||
2160 | |||
2161 | mov ecx,cache_max ; entries in cache |
||
2162 | mov esi,0x600000+8 |
||
2163 | mov edi,1 |
||
2164 | |||
2165 | hdreadcache: |
||
2166 | |||
2167 | cmp dword [esi+4],0 ; empty |
||
2168 | je nohdcache |
||
2169 | |||
2170 | cmp [esi],eax ; correct sector |
||
2171 | je yeshdcache |
||
2172 | |||
2173 | nohdcache: |
||
2174 | |||
2175 | add esi,8 |
||
2176 | inc edi |
||
2177 | dec ecx |
||
2178 | jnz hdreadcache |
||
2179 | |||
2180 | call find_empty_slot ; ret in edi |
||
2181 | |||
2182 | call wait_for_hd_idle |
||
2183 | push eax edx |
||
2184 | |||
2185 | cli |
||
2186 | xor eax,eax |
||
2187 | mov edx,[hdbase] |
||
2188 | inc edx |
||
2189 | out dx,al ; ATAFeatures ðåãèñòð "îñîáåííîñòåé" |
||
2190 | inc edx |
||
2191 | inc eax |
||
2192 | out dx,al ; ATASectorCount ñ÷åò÷èê ñåêòîðîâ |
||
2193 | inc edx |
||
2194 | mov eax,[esp+4] |
||
2195 | out dx,al ; ATASectorNumber ðåãèñòð íîìåðà ñåêòîðà |
||
2196 | shr eax,8 |
||
2197 | inc edx |
||
2198 | out dx,al ; ATACylinder íîìåð öèëèíäðà (ìëàäøèé áàéò) |
||
2199 | shr eax,8 |
||
2200 | inc edx |
||
2201 | out dx,al ; íîìåð öèëèíäðà (ñòàðøèé áàéò) |
||
2202 | shr eax,8 |
||
2203 | inc edx |
||
2204 | and al,1+2+4+8 |
||
2205 | add al,byte [hdid] |
||
2206 | add al,128+64+32 |
||
2207 | out dx,al ; íîìåð ãîëîâêè/íîìåð äèñêà |
||
2208 | inc edx |
||
2209 | mov al,20h |
||
2210 | out dx,al ; ATACommand ðåãèñòð êîìàíä |
||
2211 | sti |
||
2212 | |||
2213 | call wait_for_sector_buffer |
||
2214 | |||
2215 | cmp [hd_error],0 |
||
2216 | jne hd_read_error |
||
2217 | |||
2218 | cli |
||
2219 | push edi |
||
2220 | shl edi,9 |
||
2221 | add edi,0x600000+65536 |
||
2222 | mov ecx,256 |
||
2223 | mov edx,[hdbase] |
||
2224 | cld |
||
2225 | rep insw |
||
2226 | pop edi |
||
2227 | sti |
||
2228 | |||
2229 | pop edx eax |
||
2230 | blok_read_2: |
||
2231 | lea esi,[edi*8+0x600000] |
||
2232 | mov [esi],eax ; sector number |
||
2233 | mov dword [esi+4],1 ; hd read - mark as same as in hd |
||
2234 | |||
2235 | yeshdcache: |
||
2236 | |||
2237 | mov esi,edi |
||
2238 | shl esi,9 |
||
2239 | add esi,0x600000+65536 |
||
2240 | mov edi,ebx |
||
2241 | mov ecx,512/4 |
||
2242 | cld |
||
2243 | rep movsd ; move data |
||
2244 | ; blok_read_2: |
||
2245 | pop edi esi ecx |
||
2246 | ret |
||
2247 | |||
2248 | |||
2249 | hd_write: |
||
2250 | ;----------------------------------------------------------- |
||
2251 | ; input : eax = block |
||
2252 | ; ebx = pointer to memory |
||
2253 | ;----------------------------------------------------------- |
||
2254 | push ecx esi edi |
||
2255 | |||
2256 | ; check if the cache already has the sector and overwrite it |
||
2257 | |||
2258 | mov ecx,cache_max |
||
2259 | mov esi,0x600000+8 |
||
2260 | mov edi,1 |
||
2261 | |||
2262 | hdwritecache: |
||
2263 | |||
2264 | cmp dword [esi+4],0 ; if cache slot is empty |
||
2265 | je not_in_cache_write |
||
2266 | |||
2267 | cmp [esi],eax ; if the slot has the sector |
||
2268 | je yes_in_cache_write |
||
2269 | |||
2270 | not_in_cache_write: |
||
2271 | |||
2272 | add esi,8 |
||
2273 | inc edi |
||
2274 | dec ecx |
||
2275 | jnz hdwritecache |
||
2276 | |||
2277 | ; sector not found in cache |
||
2278 | ; write the block to a new location |
||
2279 | |||
2280 | call find_empty_slot ; ret in edi |
||
2281 | |||
2282 | lea esi,[edi*8+0x600000] |
||
2283 | mov [esi],eax ; sector number |
||
2284 | |||
2285 | yes_in_cache_write: |
||
2286 | |||
2287 | mov dword [esi+4],2 ; write - differs from hd |
||
2288 | |||
2289 | shl edi,9 |
||
2290 | add edi,0x600000+65536 |
||
2291 | mov esi,ebx |
||
2292 | mov ecx,512/4 |
||
2293 | cld |
||
2294 | rep movsd ; move data |
||
2295 | |||
2296 | pop edi esi ecx |
||
2297 | ret |
||
2298 | |||
2299 | |||
2300 | write_cache: |
||
2301 | ;----------------------------------------------------------- |
||
2302 | ; write all changed sectors to disk |
||
2303 | ;----------------------------------------------------------- |
||
2304 | push eax ecx edx esi edi |
||
2305 | |||
2306 | ; write difference ( 2 ) from cache to hd |
||
2307 | |||
2308 | mov ecx,cache_max |
||
2309 | mov esi,0x600000+8 |
||
2310 | mov edi,1 |
||
2311 | |||
2312 | write_cache_more: |
||
2313 | |||
2314 | cmp dword [esi+4],2 ; if cache slot is not different |
||
2315 | jne does_not_need_writing |
||
2316 | |||
2317 | mov dword [esi+4],1 ; same as in hd |
||
2318 | mov eax,[esi] ; eax = sector to write |
||
2319 | |||
2320 | cmp eax,[PARTITION_START] |
||
2321 | jb danger |
||
2322 | cmp eax,[PARTITION_END] |
||
2323 | ja danger |
||
2324 | |||
2325 | call wait_for_hd_idle |
||
2326 | |||
2327 | cli |
||
2328 | xor eax,eax |
||
2329 | mov edx,[hdbase] |
||
2330 | inc edx |
||
2331 | out dx,al |
||
2332 | inc edx |
||
2333 | inc eax |
||
2334 | out dx,al |
||
2335 | inc edx |
||
2336 | mov eax,[esi] ; eax = sector to write |
||
2337 | out dx,al |
||
2338 | shr eax,8 |
||
2339 | inc edx |
||
2340 | out dx,al |
||
2341 | shr eax,8 |
||
2342 | inc edx |
||
2343 | out dx,al |
||
2344 | shr eax,8 |
||
2345 | inc edx |
||
2346 | and al,1+2+4+8 |
||
2347 | add al,byte [hdid] |
||
2348 | add al,128+64+32 |
||
2349 | out dx,al |
||
2350 | inc edx |
||
2351 | mov al,30h |
||
2352 | out dx,al |
||
2353 | sti |
||
2354 | |||
2355 | call wait_for_sector_buffer |
||
2356 | |||
2357 | cmp [hd_error],0 |
||
2358 | jne hd_write_error |
||
2359 | |||
2360 | push ecx esi |
||
2361 | |||
2362 | cli |
||
2363 | mov esi,edi |
||
2364 | shl esi,9 |
||
2365 | add esi,0x600000+65536 ; esi = from memory position |
||
2366 | mov ecx,256 |
||
2367 | mov edx,[hdbase] |
||
2368 | cld |
||
2369 | rep outsw |
||
2370 | sti |
||
2371 | |||
2372 | pop esi ecx |
||
2373 | |||
2374 | danger: |
||
2375 | does_not_need_writing: |
||
2376 | |||
2377 | add esi,8 |
||
2378 | inc edi |
||
2379 | dec ecx |
||
2380 | jnz write_cache_more |
||
2381 | |||
2382 | pop edi esi edx ecx eax |
||
2383 | ret |
||
2384 | |||
2385 | |||
2386 | find_empty_slot: |
||
2387 | ;----------------------------------------------------------- |
||
2388 | ; find empty or read slot, flush cache if next 10% is used by write |
||
2389 | ; output : edi = cache slot |
||
2390 | ;----------------------------------------------------------- |
||
2391 | push ecx esi |
||
2392 | |||
2393 | search_again: |
||
2394 | |||
2395 | mov ecx,cache_max*10/100 |
||
2396 | mov edi,[cache_search_start] |
||
2397 | |||
2398 | search_for_empty: |
||
2399 | |||
2400 | inc edi |
||
2401 | cmp edi,cache_max |
||
2402 | jbe inside_cache |
||
2403 | mov edi,1 |
||
2404 | |||
2405 | inside_cache: |
||
2406 | |||
2407 | cmp dword [edi*8+0x600000+4],2 ; get cache slot info |
||
2408 | jb found_slot ; it's empty or read |
||
2409 | dec ecx |
||
2410 | jnz search_for_empty |
||
2411 | |||
2412 | call write_cache ; no empty slots found, write all |
||
2413 | jmp search_again ; and start again |
||
2414 | |||
2415 | found_slot: |
||
2416 | |||
2417 | mov [cache_search_start],edi |
||
2418 | |||
2419 | pop esi ecx |
||
2420 | ret |
||
2421 | |||
2422 | |||
2423 | save_hd_wait_timeout: |
||
2424 | |||
2425 | push eax |
||
2426 | mov eax,[timer_ticks];[0xfdf0] |
||
2427 | add eax,300 ; 3 sec timeout |
||
2428 | mov [hd_wait_timeout],eax |
||
2429 | pop eax |
||
2430 | ret |
||
2431 | |||
2432 | |||
2433 | check_hd_wait_timeout: |
||
2434 | |||
2435 | push eax |
||
2436 | mov eax,[hd_wait_timeout] |
||
2437 | cmp [timer_ticks], eax ;[0xfdf0],eax |
||
2438 | jg hd_timeout_error |
||
2439 | pop eax |
||
2440 | ret |
||
2441 | |||
2442 | iglobal |
||
2443 | hd_timeout_str db 'K : FS - HD timeout',13,10,0 |
||
2444 | hd_read_str db 'K : FS - HD read error',13,10,0 |
||
2445 | hd_write_str db 'K : FS - HD write error',13,10,0 |
||
2446 | endg |
||
2447 | |||
2448 | hd_timeout_error: |
||
2449 | |||
2450 | call clear_hd_cache |
||
2451 | call clear_application_table_status |
||
2452 | mov esi,hd_timeout_str |
||
2453 | call sys_msg_board_str |
||
2454 | jmp $ |
||
2455 | |||
2456 | |||
2457 | hd_read_error: |
||
2458 | |||
2459 | call clear_hd_cache |
||
2460 | call clear_application_table_status |
||
2461 | mov esi,hd_read_str |
||
2462 | call sys_msg_board_str |
||
2463 | jmp $ |
||
2464 | |||
2465 | hd_write_error: |
||
2466 | |||
2467 | call clear_hd_cache |
||
2468 | call clear_application_table_status |
||
2469 | mov esi,hd_write_str |
||
2470 | call sys_msg_board_str |
||
2471 | jmp $ |
||
2472 | |||
2473 | |||
2474 | |||
2475 | |||
2476 | wait_for_hd_idle: |
||
2477 | |||
2478 | push eax edx |
||
2479 | |||
2480 | call save_hd_wait_timeout |
||
2481 | |||
2482 | mov edx,[hdbase] |
||
2483 | add edx,0x7 |
||
2484 | |||
2485 | wfhil1: |
||
2486 | |||
2487 | call check_hd_wait_timeout |
||
2488 | |||
2489 | in al,dx |
||
2490 | test al,128 |
||
2491 | jnz wfhil1 |
||
2492 | |||
2493 | pop edx eax |
||
2494 | ret |
||
2495 | |||
2496 | |||
2497 | wait_for_sector_buffer: |
||
2498 | |||
2499 | push eax edx |
||
2500 | |||
2501 | mov edx,[hdbase] |
||
2502 | add edx,0x7 |
||
2503 | |||
2504 | call save_hd_wait_timeout |
||
2505 | |||
2506 | hdwait_sbuf: ; wait for sector buffer to be ready |
||
2507 | |||
2508 | call check_hd_wait_timeout |
||
2509 | |||
2510 | in al,dx |
||
2511 | test al,8 |
||
2512 | jz hdwait_sbuf |
||
2513 | |||
2514 | mov [hd_error],0 |
||
2515 | |||
2516 | cmp [hd_setup],1 ; do not mark error for setup request |
||
2517 | je buf_wait_ok |
||
2518 | |||
2519 | test al,1 ; previous command ended up with an error |
||
2520 | jz buf_wait_ok |
||
2521 | mov [hd_error],1 |
||
2522 | |||
2523 | buf_wait_ok: |
||
2524 | |||
2525 | pop edx eax |
||
2526 | ret |
||
2527 | |||
2528 | |||
2529 | |||
2530 | read_hd_file: |
||
2531 | ;----------------------------------------------------------------- |
||
2532 | ; |
||
2533 | ; Converting old reading function for hd-application start. |
||
2534 | ; |
||
2535 | ; IN: |
||
2536 | ; |
||
2537 | ; eax - pointer to file (0 = read only first sector of drive: eg 'label') |
||
2538 | ; ebx - file lenght |
||
2539 | ; ecx - start 512 byte block number |
||
2540 | ; edx - number of blocks to read |
||
2541 | ; esi - pointer to return/work area (atleast 20 000 bytes) |
||
2542 | ; |
||
2543 | ; For new read function |
||
2544 | ; |
||
2545 | ; EAX (PAR0) pointer to file-name |
||
2546 | ; ECX (PAR1) pointer to buffer |
||
2547 | ; EBX (PAR2) vt file blocks to read |
||
2548 | ; EDX (PAR3) pointer to path |
||
2549 | ; ESI vt first 512 block to read |
||
2550 | ; EDI if 0 - return root |
||
2551 | ;-------------------------------------------------------------------------- |
||
2552 | |||
2553 | push ecx esi edi |
||
2554 | mov esi,eax |
||
2555 | mov edi,startpath |
||
2556 | mov ecx,250 |
||
2557 | cld |
||
2558 | rep movsb |
||
2559 | pop edi esi ecx |
||
2560 | |||
2561 | mov eax,startpath |
||
2562 | mov [eax+ebx-12],byte 0 |
||
2563 | |||
2564 | push eax ebx ecx edx esi |
||
2565 | |||
2566 | pop ecx ; pointer to buffer |
||
2567 | add ecx,1024 |
||
2568 | pop ebx ; number of blocks to read |
||
2569 | pop esi ; first block to read |
||
2570 | dec esi |
||
2571 | pop eax ; file length |
||
2572 | pop edx ; pointer to path |
||
2573 | |||
2574 | mov edi,12 |
||
2575 | lea eax,[eax+edx-12+1] |
||
2576 | call file_read |
||
2577 | |||
2578 | ret>>>> |
||
2579 |