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Rev | Author | Line No. | Line |
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431 | serge | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
593 | mikedld | 2 | ;; ;; |
431 | serge | 3 | ;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;; |
4 | ;; Distributed under terms of the GNU General Public License ;; |
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5 | ;; ;; |
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593 | mikedld | 6 | ;; FAT12.INC ;; |
7 | ;; (C) 2005 Mario79, License: GPL ;; |
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8 | ;; ;; |
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431 | serge | 9 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
1 | ha | 10 | |
593 | mikedld | 11 | $Revision: 593 $ |
12 | |||
13 | |||
1 | ha | 14 | n_sector dd 0 ; temporary save for sector value |
15 | flp_status dd 0 |
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16 | clust_tmp_flp dd 0 ; used by analyze_directory and analyze_directory_to_write |
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17 | path_pointer_flp dd 0 |
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18 | pointer_file_name_flp dd 0 |
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19 | save_root_flag db 0 |
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20 | save_flag db 0 |
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21 | root_read db 0 ; 0-necessary to load root, 1-not to load root |
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22 | flp_fat db 0 ; 0-necessary to load fat, 1-not to load fat |
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23 | flp_number db 0 ; 1- Floppy A, 2-Floppy B |
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24 | old_track db 0 ; old value track |
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25 | flp_label rb 15 ; Label and ID of inserted floppy disk |
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26 | |||
27 | reserve_flp: |
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28 | |||
29 | cli |
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30 | cmp [flp_status],0 |
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31 | je reserve_flp_ok |
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32 | |||
33 | sti |
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34 | call change_task |
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35 | jmp reserve_flp |
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36 | |||
37 | reserve_flp_ok: |
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38 | |||
39 | push eax |
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379 | serge | 40 | mov eax,[CURRENT_TASK] |
1 | ha | 41 | shl eax,5 |
379 | serge | 42 | mov eax,[eax+CURRENT_TASK+TASKDATA.pid] |
1 | ha | 43 | mov [flp_status],eax |
44 | pop eax |
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45 | sti |
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46 | ret |
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47 | |||
48 | |||
49 | floppy_fileread: |
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50 | ;---------------------------------------------------------------- |
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51 | ; |
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52 | ; fileread - sys floppy |
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53 | ; |
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54 | ; eax points to filename 11 chars - for root directory |
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55 | ; ebx first wanted block ; 1+ ; if 0 then set to 1 |
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56 | ; ecx number of blocks to read ; 1+ ; if 0 then set to 1 |
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57 | ; edx mem location to return data |
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58 | ; esi length of filename 12*X |
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59 | ; edi pointer to path /fd/1/...... - for all files in nested directories |
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60 | ; |
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61 | ; ret ebx = size or 0xffffffff file not found |
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62 | ; eax = 0 ok read or other = errormsg |
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63 | ; 10 = access denied |
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64 | ;-------------------------------------------------------------- |
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65 | |||
66 | mov [save_flag],0 |
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67 | mov [path_pointer_flp],edi |
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68 | cmp esi,0 ; return ramdisk root |
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69 | jne fr_noroot_1 |
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70 | cmp ebx,224/16 |
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71 | jbe fr_do_1 |
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72 | mov eax,5 |
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73 | mov ebx,0 |
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74 | mov [flp_status],0 |
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75 | ret |
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76 | |||
77 | fr_do_1: |
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78 | push ebx ecx edx |
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79 | call read_flp_root |
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80 | pop edx ecx ebx |
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81 | cmp [FDC_Status],0 |
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82 | jne fdc_status_error_1 |
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83 | mov edi,edx |
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84 | dec ebx |
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85 | shl ebx,9 |
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380 | serge | 86 | mov esi,FLOPPY_BUFF |
1 | ha | 87 | add esi,ebx |
88 | shl ecx,9 |
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89 | cld |
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90 | rep movsb |
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91 | mov eax,0 ; ok read |
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92 | mov ebx,0 |
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93 | mov [flp_status],0 |
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94 | ret |
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95 | fdc_status_error_1: |
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96 | mov [flp_status],0 |
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131 | diamond | 97 | mov eax,10 |
1 | ha | 98 | mov ebx,-1 |
99 | ret |
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100 | |||
101 | fr_noroot_1: |
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102 | sub esp,32 |
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103 | call expand_filename |
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104 | frfloppy_1: |
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105 | cmp ebx,0 |
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106 | jne frfl5_1 |
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107 | mov ebx,1 |
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108 | frfl5_1: |
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109 | cmp ecx,0 |
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110 | jne frfl6_1 |
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111 | mov ecx,1 |
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112 | frfl6_1: |
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113 | dec ebx |
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114 | push eax |
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115 | push eax ebx ecx edx esi edi |
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116 | call read_flp_fat |
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117 | cmp [FDC_Status],0 |
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118 | jne fdc_status_error_3_1 |
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119 | mov [FDD_Track],0 ; Цилиндр |
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120 | mov [FDD_Head],1 ; Сторона |
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121 | mov [FDD_Sector],2 ; Сектор |
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122 | call SeekTrack |
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123 | mov dh,14 |
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124 | l.20_1: |
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125 | call ReadSectWithRetr |
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126 | cmp [FDC_Status],0 |
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127 | jne fdc_status_error_3_1 |
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128 | mov dl,16 |
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380 | serge | 129 | mov edi,FDD_BUFF |
1 | ha | 130 | inc [FDD_Sector] |
131 | l.21_1: |
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132 | mov esi,eax ;Name of file we want |
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133 | mov ecx,11 |
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134 | cld |
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135 | rep cmpsb ;Found the file? |
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136 | je fifound_1 ;Yes |
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137 | add ecx,21 |
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138 | add edi, ecx ;Advance to next entry |
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139 | dec dl |
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140 | cmp dl,0 |
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141 | jne l.21_1 |
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142 | dec dh |
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143 | cmp dh,0 |
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144 | jne l.20_1 |
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145 | fdc_status_error_3: |
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146 | mov eax,5 ; file not found ? |
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147 | mov ebx,-1 |
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148 | add esp,32+28 |
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149 | mov [flp_status],0 |
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150 | ret |
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151 | fdc_status_error_3_2: |
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152 | cmp [FDC_Status],0 |
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153 | je fdc_status_error_3 |
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154 | fdc_status_error_3_1: |
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155 | add esp,32+28 |
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156 | jmp fdc_status_error_1 |
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157 | |||
158 | fifound_1: |
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159 | mov eax,[path_pointer_flp] |
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160 | cmp [eax+36],byte 0 |
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161 | je fifound_2 |
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162 | add edi,0xf |
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163 | mov eax,[edi] |
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164 | and eax,65535 |
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165 | mov ebx,[path_pointer_flp] |
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166 | add ebx,36 |
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167 | call get_cluster_of_a_path_flp |
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168 | jc fdc_status_error_3_2 |
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169 | mov ebx,[ebx-11+28] ;file size |
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170 | mov [esp+20],ebx |
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171 | mov [esp+24],ebx |
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172 | jmp fifound_3 |
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173 | fifound_2: |
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174 | mov ebx,[edi-11+28] ;file size |
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175 | mov [esp+20],ebx |
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176 | mov [esp+24],ebx |
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177 | add edi,0xf |
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178 | mov eax,[edi] |
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179 | fifound_3: |
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180 | and eax,65535 |
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181 | mov [n_sector],eax ;eax=cluster |
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182 | frnew_1: |
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183 | add eax,31 ;bootsector+2*fat+filenames |
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184 | cmp [esp+16],dword 0 ; wanted cluster ? |
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185 | jne frfl7_1 |
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186 | call read_chs_sector |
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187 | cmp [FDC_Status],0 |
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188 | jne fdc_status_error_5 |
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189 | mov edi,[esp+8] |
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190 | call give_back_application_data_1 |
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191 | add [esp+8],dword 512 |
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192 | dec dword [esp+12] ; last wanted cluster ? |
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193 | cmp [esp+12],dword 0 |
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194 | je frnoread_1 |
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195 | jmp frfl8_1 |
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196 | frfl7_1: |
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197 | dec dword [esp+16] |
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198 | frfl8_1: |
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199 | mov edi,[n_sector] |
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200 | shl edi,1 ;find next cluster from FAT |
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381 | serge | 201 | add edi,FLOPPY_FAT |
1 | ha | 202 | mov eax,[edi] |
203 | and eax,4095 |
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204 | mov edi,eax |
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205 | mov [n_sector],edi |
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206 | cmp edi,4095 ;eof - cluster |
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207 | jz frnoread2_1 |
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208 | cmp [esp+24],dword 512 ;eof - size |
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209 | jb frnoread_1 |
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210 | sub [esp+24],dword 512 |
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211 | jmp frnew_1 |
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212 | |||
131 | diamond | 213 | read_chs_sector: |
1 | ha | 214 | call calculate_chs |
215 | call ReadSectWithRetr |
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216 | ret |
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217 | |||
218 | frnoread2_1: |
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219 | cmp [esp+16],dword 0 ; eof without read ? |
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220 | je frnoread_1 |
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221 | mov [fdc_irq_func],fdc_null |
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222 | pop edi esi edx ecx |
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223 | add esp,4 |
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224 | pop ebx ; ebx <- eax : size of file |
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225 | add esp,36 |
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226 | mov eax,6 ; end of file |
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227 | mov [flp_status],0 |
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228 | ret |
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229 | |||
230 | frnoread_1: |
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231 | pop edi esi edx ecx |
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232 | add esp,4 |
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233 | pop ebx ; ebx <- eax : size of file |
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234 | add esp,36 |
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235 | mov eax,0 |
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236 | mov [flp_status],0 |
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237 | ret |
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238 | |||
239 | fdc_status_error_5: |
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240 | pop edi esi edx ecx |
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241 | add esp,4 |
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242 | pop ebx ; ebx <- eax : size of file |
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243 | add esp,36 |
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244 | jmp fdc_status_error_1 |
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245 | |||
246 | read_flp_root: |
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247 | pusha |
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248 | call check_label |
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249 | cmp [FDC_Status],0 |
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250 | jne unnecessary_root_read |
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251 | cmp [root_read],1 |
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252 | je unnecessary_root_read |
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253 | mov [FDD_Track],0 ; Цилиндр |
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254 | mov [FDD_Head],1 ; Сторона |
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131 | diamond | 255 | mov [FDD_Sector],2 ; Сектор |
380 | serge | 256 | mov edi,FLOPPY_BUFF |
1 | ha | 257 | call SeekTrack |
258 | read_flp_root_1: |
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259 | call ReadSectWithRetr |
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260 | cmp [FDC_Status],0 |
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261 | jne unnecessary_root_read |
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262 | push edi |
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263 | call give_back_application_data_1 |
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264 | pop edi |
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265 | add edi,512 |
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266 | inc [FDD_Sector] |
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267 | cmp [FDD_Sector],16 |
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268 | jne read_flp_root_1 |
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269 | mov [root_read],1 |
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270 | unnecessary_root_read: |
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271 | popa |
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272 | ret |
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273 | |||
274 | |||
275 | read_flp_fat: |
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276 | pusha |
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277 | call check_label |
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278 | cmp [FDC_Status],0 |
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279 | jne unnecessary_flp_fat |
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280 | cmp [flp_fat],1 |
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281 | je unnecessary_flp_fat |
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282 | mov [FDD_Track],0 ; Цилиндр |
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283 | mov [FDD_Head],0 ; Сторона |
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131 | diamond | 284 | mov [FDD_Sector],2 ; Сектор |
380 | serge | 285 | mov edi,FLOPPY_BUFF |
1 | ha | 286 | call SeekTrack |
287 | read_flp_fat_1: |
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288 | call ReadSectWithRetr |
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289 | cmp [FDC_Status],0 |
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290 | jne unnecessary_flp_fat |
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291 | push edi |
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292 | call give_back_application_data_1 |
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293 | pop edi |
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294 | add edi,512 |
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295 | inc [FDD_Sector] |
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296 | cmp [FDD_Sector],19 |
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297 | jne read_flp_fat_1 |
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298 | mov [FDD_Sector],1 |
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299 | mov [FDD_Head],1 |
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300 | call ReadSectWithRetr |
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301 | cmp [FDC_Status],0 |
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302 | jne unnecessary_flp_fat |
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303 | call give_back_application_data_1 |
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304 | call calculatefatchain_flp |
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305 | mov [root_read],0 |
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306 | mov [flp_fat],1 |
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307 | unnecessary_flp_fat: |
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308 | popa |
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309 | ret |
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310 | |||
311 | calculatefatchain_flp: |
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312 | pushad |
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313 | |||
380 | serge | 314 | mov esi,FLOPPY_BUFF |
381 | serge | 315 | mov edi,FLOPPY_FAT |
1 | ha | 316 | |
317 | fcnew_1: |
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318 | mov eax,dword [esi] |
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319 | mov ebx,dword [esi+4] |
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320 | mov ecx,dword [esi+8] |
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321 | mov edx,ecx |
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322 | shr edx,4 ;8 ok |
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323 | shr dx,4 ;7 ok |
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324 | xor ch,ch |
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325 | shld ecx,ebx,20 ;6 ok |
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326 | shr cx,4 ;5 ok |
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327 | shld ebx,eax,12 |
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328 | and ebx,0x0fffffff ;4 ok |
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329 | shr bx,4 ;3 ok |
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330 | shl eax,4 |
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331 | and eax,0x0fffffff ;2 ok |
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332 | shr ax,4 ;1 ok |
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333 | mov dword [edi],eax |
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334 | add edi,4 |
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335 | mov dword [edi],ebx |
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336 | add edi,4 |
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337 | mov dword [edi],ecx |
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338 | add edi,4 |
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339 | mov dword [edi],edx |
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131 | diamond | 340 | add edi,4 |
1 | ha | 341 | add esi,12 |
342 | |||
381 | serge | 343 | cmp edi,FLOPPY_FAT+2856*2 ;2849 clusters |
1 | ha | 344 | jnz fcnew_1 |
345 | |||
346 | popad |
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347 | ret |
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131 | diamond | 348 | |
1 | ha | 349 | check_label: |
350 | pushad |
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351 | mov [FDD_Track],0 ; Цилиндр |
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352 | mov [FDD_Head],0 ; Сторона |
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131 | diamond | 353 | mov [FDD_Sector],1 ; Сектор |
1 | ha | 354 | call SetUserInterrupts |
355 | call FDDMotorON |
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356 | call RecalibrateFDD |
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357 | cmp [FDC_Status],0 |
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358 | jne fdc_status_error |
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359 | call SeekTrack |
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360 | cmp [FDC_Status],0 |
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361 | jne fdc_status_error |
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362 | call ReadSectWithRetr |
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363 | cmp [FDC_Status],0 |
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131 | diamond | 364 | jne fdc_status_error |
1 | ha | 365 | mov esi,flp_label |
380 | serge | 366 | mov edi,FDD_BUFF+39 |
1 | ha | 367 | mov ecx,15 |
368 | cld |
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131 | diamond | 369 | rep cmpsb |
1 | ha | 370 | je same_label |
371 | mov [root_read],0 |
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372 | mov [flp_fat],0 |
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373 | same_label: |
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380 | serge | 374 | mov esi,FDD_BUFF+39 |
1 | ha | 375 | mov edi,flp_label |
376 | mov ecx,15 |
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377 | cld |
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378 | rep movsb |
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379 | popad |
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380 | ret |
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381 | fdc_status_error: |
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382 | popad |
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383 | ret |
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384 | |||
385 | save_flp_root: |
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386 | pusha |
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387 | call check_label |
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388 | cmp [FDC_Status],0 |
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389 | jne unnecessary_root_save |
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390 | cmp [root_read],0 |
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391 | je unnecessary_root_save |
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392 | mov [FDD_Track],0 ; Цилиндр |
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393 | mov [FDD_Head],1 ; Сторона |
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131 | diamond | 394 | mov [FDD_Sector],2 ; Сектор |
380 | serge | 395 | mov esi,FLOPPY_BUFF |
1 | ha | 396 | call SeekTrack |
397 | save_flp_root_1: |
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398 | push esi |
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399 | call take_data_from_application_1 |
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400 | pop esi |
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401 | add esi,512 |
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402 | call WriteSectWithRetr |
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403 | cmp [FDC_Status],0 |
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404 | jne unnecessary_root_save |
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405 | inc [FDD_Sector] |
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406 | cmp [FDD_Sector],16 |
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407 | jne save_flp_root_1 |
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408 | unnecessary_root_save: |
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409 | mov [fdc_irq_func],fdc_null |
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410 | popa |
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411 | ret |
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131 | diamond | 412 | |
1 | ha | 413 | save_flp_fat: |
414 | pusha |
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415 | call check_label |
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416 | cmp [FDC_Status],0 |
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417 | jne unnecessary_flp_fat_save |
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418 | cmp [flp_fat],0 |
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419 | je unnecessary_flp_fat_save |
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420 | call restorefatchain_flp |
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421 | mov [FDD_Track],0 ; Цилиндр |
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422 | mov [FDD_Head],0 ; Сторона |
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131 | diamond | 423 | mov [FDD_Sector],2 ; Сектор |
380 | serge | 424 | mov esi,FLOPPY_BUFF |
1 | ha | 425 | call SeekTrack |
426 | save_flp_fat_1: |
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427 | push esi |
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428 | call take_data_from_application_1 |
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429 | pop esi |
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430 | add esi,512 |
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431 | call WriteSectWithRetr |
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432 | cmp [FDC_Status],0 |
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433 | jne unnecessary_flp_fat_save |
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434 | inc [FDD_Sector] |
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435 | cmp [FDD_Sector],19 |
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436 | jne save_flp_fat_1 |
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437 | mov [FDD_Sector],1 |
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438 | mov [FDD_Head],1 |
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439 | call take_data_from_application_1 |
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440 | call WriteSectWithRetr |
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441 | cmp [FDC_Status],0 |
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442 | jne unnecessary_flp_fat_save |
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443 | mov [root_read],0 |
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444 | unnecessary_flp_fat_save: |
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445 | mov [fdc_irq_func],fdc_null |
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446 | popa |
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447 | ret |
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448 | |||
131 | diamond | 449 | |
1 | ha | 450 | restorefatchain_flp: ; restore fat chain |
451 | pushad |
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452 | |||
381 | serge | 453 | mov esi,FLOPPY_FAT |
380 | serge | 454 | mov edi,FLOPPY_BUFF |
1 | ha | 455 | |
456 | fcnew2_1: |
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457 | mov eax,dword [esi] |
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458 | mov ebx,dword [esi+4] |
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459 | shl ax,4 |
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460 | shl eax,4 |
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461 | shl bx,4 |
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462 | shr ebx,4 |
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463 | shrd eax,ebx,8 |
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464 | shr ebx,8 |
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465 | mov dword [edi],eax |
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466 | add edi,4 |
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467 | mov word [edi],bx |
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468 | add edi,2 |
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469 | add esi,8 |
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470 | |||
380 | serge | 471 | cmp edi,FLOPPY_BUFF+0x1200 ;4274 bytes - all used FAT |
1 | ha | 472 | jb fcnew2_1 |
473 | |||
380 | serge | 474 | mov esi,FLOPPY_BUFF ; duplicate fat chain |
475 | mov edi,FLOPPY_BUFF+0x1200 |
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1 | ha | 476 | mov ecx,0x1200/4 |
477 | cld |
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478 | rep movsd |
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479 | |||
480 | popad |
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481 | ret |
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482 | |||
483 | |||
484 | save_chs_sector: |
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485 | call calculate_chs |
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486 | call WriteSectWithRetr |
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487 | ret |
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131 | diamond | 488 | |
1 | ha | 489 | calculate_chs: |
490 | mov bl,[FDD_Track] |
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131 | diamond | 491 | mov [old_track],bl |
1 | ha | 492 | mov ebx,18 |
493 | xor edx,edx |
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494 | div ebx |
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495 | inc edx |
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496 | mov [FDD_Sector],dl |
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497 | xor edx,edx |
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498 | mov ebx,2 |
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499 | div ebx |
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500 | mov [FDD_Track],al |
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501 | mov [FDD_Head],0 |
||
502 | cmp edx,0 |
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503 | je no_head_2 |
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504 | inc [FDD_Head] |
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505 | no_head_2: |
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506 | mov dl,[old_track] |
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507 | cmp dl,[FDD_Track] |
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508 | je no_seek_track_1 |
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509 | call SeekTrack |
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510 | no_seek_track_1: |
||
511 | ret |
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512 | |||
131 | diamond | 513 | |
1 | ha | 514 | get_cluster_of_a_path_flp: |
515 | ;--------------------------------------------------------- |
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516 | ; input : EBX = pointer to a path string |
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517 | ; (example: the path "/files/data/document" become |
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518 | ; "files......data.......document...0" |
||
519 | ; '.' = space char |
||
520 | ; '0' = char(0) (ASCII=0) !!! ) |
||
521 | ; output : if (CARRY=1) -> ERROR in the PATH |
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522 | ; if (CARRY=0) -> EAX=cluster |
||
523 | ;--------------------------------------------------------- |
||
524 | |||
525 | push edx |
||
526 | mov edx,ebx |
||
527 | |||
528 | search_end_of_path_flp: |
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529 | cmp [save_flag],0 |
||
530 | jne search_end_of_path_flp_1 |
||
531 | cmp byte [edx],0 |
||
532 | je found_end_of_path_flp |
||
533 | jmp search_end_of_path_flp_2 |
||
534 | search_end_of_path_flp_1: |
||
535 | cmp byte [edx+12],0 |
||
536 | je found_end_of_path_flp |
||
537 | search_end_of_path_flp_2: |
||
538 | inc edx ; '/' |
||
539 | call analyze_directory_flp |
||
540 | jc directory_not_found_flp |
||
541 | |||
542 | mov eax,[ebx+20-2] ; read the HIGH 16bit cluster field |
||
543 | mov ax,[ebx+26] ; read the LOW 16bit cluster field |
||
544 | and eax,0xfff ;[fatMASK] |
||
545 | add edx,11 ; 8+3 (name+extension) |
||
546 | jmp search_end_of_path_flp |
||
547 | |||
548 | found_end_of_path_flp: |
||
549 | inc edx |
||
550 | mov [pointer_file_name_flp],edx |
||
551 | pop edx |
||
552 | clc ; no errors |
||
553 | ret |
||
554 | |||
555 | directory_not_found_flp: |
||
556 | pop edx |
||
557 | stc ; errors occour |
||
558 | ret |
||
131 | diamond | 559 | |
1 | ha | 560 | analyze_directory_flp: |
561 | ;-------------------------------- |
||
562 | ; input : EAX = first cluster of the directory |
||
563 | ; EBX = pointer to filename |
||
564 | ; output : IF CARRY=0 EAX = sector where th file is found |
||
565 | ; EBX = pointer in buffer |
||
566 | ; [buffer .. buffer+511] |
||
567 | ; ECX,EDX,EDI,EDI not changed |
||
568 | ; IF CARRY=1 |
||
569 | ;-------------------------------- |
||
570 | push ebx ;[esp+16] |
||
571 | push ecx |
||
572 | push edx |
||
573 | push esi |
||
574 | push edi |
||
131 | diamond | 575 | |
576 | |||
1 | ha | 577 | adr56_flp: |
578 | mov [clust_tmp_flp],eax |
||
579 | add eax,31 |
||
580 | pusha |
||
581 | call read_chs_sector |
||
582 | popa |
||
583 | cmp [FDC_Status],0 |
||
584 | jne not_found_file_analyze_flp |
||
585 | |||
586 | mov ecx,512/32 |
||
380 | serge | 587 | mov ebx,FDD_BUFF |
131 | diamond | 588 | |
1 | ha | 589 | adr1_analyze_flp: |
590 | mov esi,edx ;[esp+16] |
||
591 | mov edi,ebx |
||
592 | cld |
||
593 | push ecx |
||
594 | mov ecx,11 |
||
595 | rep cmpsb |
||
596 | pop ecx |
||
597 | je found_file_analyze_flp |
||
131 | diamond | 598 | |
1 | ha | 599 | add ebx,32 |
600 | loop adr1_analyze_flp |
||
131 | diamond | 601 | |
1 | ha | 602 | mov eax,[clust_tmp_flp] |
603 | shl eax,1 ;find next cluster from FAT |
||
381 | serge | 604 | add eax,FLOPPY_FAT |
1 | ha | 605 | mov eax,[eax] |
606 | and eax,4095 |
||
607 | cmp eax,0x0ff8 |
||
608 | jb adr56_flp |
||
131 | diamond | 609 | not_found_file_analyze_flp: |
1 | ha | 610 | pop edi |
611 | pop esi |
||
612 | pop edx |
||
613 | pop ecx |
||
614 | add esp,4 |
||
615 | stc ;file not found |
||
616 | ret |
||
131 | diamond | 617 | |
1 | ha | 618 | found_file_analyze_flp: |
619 | pop edi |
||
620 | pop esi |
||
621 | pop edx |
||
622 | pop ecx |
||
623 | add esp,4 |
||
624 | clc ;file found |
||
625 | ret |
||
131 | diamond | 626 | |
627 | |||
71 | diamond | 628 | ; \begin{diamond} |
83 | diamond | 629 | fat_find_lfn: |
71 | diamond | 630 | ; in: esi->name |
83 | diamond | 631 | ; [esp+4] = next |
632 | ; [esp+8] = first |
||
633 | ; [esp+C]... - possibly parameters for first and next |
||
71 | diamond | 634 | ; out: CF=1 - file not found |
83 | diamond | 635 | ; else CF=0, esi->next name component, edi->direntry |
75 | diamond | 636 | pusha |
83 | diamond | 637 | lea eax, [esp+0Ch+20h] |
638 | call dword [eax-4] |
||
639 | jc .reterr |
||
75 | diamond | 640 | sub esp, 262*2 ; reserve place for LFN |
641 | mov ebp, esp |
||
642 | push 0 ; for fat_get_name: read ASCII name |
||
83 | diamond | 643 | .l1: |
75 | diamond | 644 | call fat_get_name |
83 | diamond | 645 | jc .l2 |
75 | diamond | 646 | call fat_compare_name |
647 | jz .found |
||
83 | diamond | 648 | .l2: |
649 | lea eax, [esp+0Ch+20h+262*2+4] |
||
650 | call dword [eax-8] |
||
651 | jnc .l1 |
||
75 | diamond | 652 | add esp, 262*2+4 |
83 | diamond | 653 | .reterr: |
654 | stc |
||
75 | diamond | 655 | popa |
656 | ret |
||
71 | diamond | 657 | .found: |
83 | diamond | 658 | add esp, 262*2+4 |
659 | ; if this is LFN entry, advance to true entry |
||
75 | diamond | 660 | cmp byte [edi+11], 0xF |
83 | diamond | 661 | jnz @f |
662 | lea eax, [esp+0Ch+20h] |
||
663 | call dword [eax-8] |
||
664 | jc .reterr |
||
665 | @@: |
||
666 | add esp, 8 ; CF=0 |
||
667 | push esi |
||
668 | push edi |
||
669 | popa |
||
670 | ret |
||
671 | |||
171 | diamond | 672 | uglobal |
673 | ; this is for delete support |
||
674 | fd_prev_sector dd ? |
||
675 | fd_prev_prev_sector dd ? |
||
676 | endg |
||
677 | |||
83 | diamond | 678 | flp_root_next: |
465 | serge | 679 | cmp edi, OS_BASE+0xD200-0x20 |
83 | diamond | 680 | jae @f |
75 | diamond | 681 | add edi, 0x20 |
83 | diamond | 682 | ret ; CF=0 |
683 | @@: |
||
684 | ; read next sector |
||
685 | inc dword [eax] |
||
686 | cmp dword [eax], 14 |
||
687 | jae flp_root_first.readerr |
||
171 | diamond | 688 | push [fd_prev_sector] |
689 | pop [fd_prev_prev_sector] |
||
690 | push eax |
||
691 | mov eax, [eax] |
||
692 | add eax, 19-1 |
||
693 | mov [fd_prev_sector], eax |
||
694 | pop eax |
||
83 | diamond | 695 | flp_root_first: |
696 | mov eax, [eax] |
||
697 | pusha |
||
698 | add eax, 19 |
||
75 | diamond | 699 | call read_chs_sector |
83 | diamond | 700 | popa |
75 | diamond | 701 | cmp [FDC_Status], 0 |
83 | diamond | 702 | jnz .readerr |
380 | serge | 703 | mov edi, FDD_BUFF |
83 | diamond | 704 | ret ; CF=0 |
705 | .readerr: |
||
706 | stc |
||
707 | ret |
||
708 | |||
709 | flp_rootmem_first: |
||
380 | serge | 710 | mov edi, FLOPPY_BUFF |
83 | diamond | 711 | clc |
712 | ret |
||
713 | flp_rootmem_next: |
||
714 | add edi, 0x20 |
||
380 | serge | 715 | cmp edi, FLOPPY_BUFF+14*0x200 |
83 | diamond | 716 | cmc |
717 | flp_rootmem_next_write: |
||
718 | flp_rootmem_begin_write: |
||
719 | flp_rootmem_end_write: |
||
720 | ret |
||
721 | flp_rootmem_extend_dir: |
||
722 | stc |
||
723 | ret |
||
724 | |||
725 | flp_notroot_next: |
||
465 | serge | 726 | cmp edi, OS_BASE+0xD200-0x20 |
83 | diamond | 727 | jae flp_notroot_next_sector |
728 | add edi, 0x20 |
||
729 | ret ; CF=0 |
||
730 | flp_notroot_next_sector: |
||
731 | push ecx |
||
732 | mov ecx, [eax] |
||
171 | diamond | 733 | push [fd_prev_sector] |
734 | pop [fd_prev_prev_sector] |
||
735 | add ecx, 31 |
||
736 | mov [fd_prev_sector], ecx |
||
381 | serge | 737 | mov ecx, [(ecx-31)*2+FLOPPY_FAT] |
83 | diamond | 738 | and ecx, 0xFFF |
739 | cmp ecx, 2849 |
||
740 | jae flp_notroot_first.err2 |
||
741 | mov [eax], ecx |
||
742 | pop ecx |
||
743 | flp_notroot_first: |
||
744 | mov eax, [eax] |
||
745 | cmp eax, 2 |
||
746 | jb .err |
||
747 | cmp eax, 2849 |
||
748 | jae .err |
||
749 | pusha |
||
75 | diamond | 750 | add eax, 31 |
83 | diamond | 751 | call read_chs_sector |
752 | popa |
||
380 | serge | 753 | mov edi, FDD_BUFF |
83 | diamond | 754 | cmp [FDC_Status], 0 |
755 | jnz .err |
||
756 | ret ; CF=0 |
||
757 | .err2: |
||
758 | pop ecx |
||
759 | .err: |
||
760 | stc |
||
75 | diamond | 761 | ret |
83 | diamond | 762 | flp_notroot_begin_write: |
763 | pusha |
||
764 | mov eax, [eax] |
||
765 | add eax, 31 |
||
766 | call read_chs_sector |
||
767 | popa |
||
768 | ret |
||
769 | flp_notroot_end_write: |
||
770 | pusha |
||
771 | mov eax, [eax] |
||
772 | add eax, 31 |
||
773 | call save_chs_sector |
||
774 | popa |
||
775 | ret |
||
776 | flp_notroot_next_write: |
||
465 | serge | 777 | cmp edi, OS_BASE+0xD200 |
83 | diamond | 778 | jae @f |
779 | ret |
||
780 | @@: |
||
781 | call flp_notroot_end_write |
||
782 | jmp flp_notroot_next_sector |
||
783 | flp_notroot_extend_dir: |
||
784 | ; find free cluster in FAT |
||
785 | pusha |
||
786 | xor eax, eax |
||
381 | serge | 787 | mov edi, FLOPPY_FAT |
83 | diamond | 788 | mov ecx, 2849 |
789 | repnz scasw |
||
790 | jnz .notfound |
||
791 | mov word [edi-2], 0xFFF ; mark as last cluster |
||
381 | serge | 792 | sub edi, FLOPPY_FAT |
83 | diamond | 793 | shr edi, 1 |
794 | dec edi |
||
795 | mov eax, [esp+28] |
||
796 | mov ecx, [eax] |
||
381 | serge | 797 | mov [FLOPPY_FAT+ecx*2], di |
83 | diamond | 798 | mov [eax], edi |
799 | xor eax, eax |
||
380 | serge | 800 | mov edi, FDD_BUFF |
83 | diamond | 801 | mov ecx, 128 |
802 | rep stosd |
||
803 | popa |
||
804 | call flp_notroot_end_write |
||
380 | serge | 805 | mov edi, FDD_BUFF |
83 | diamond | 806 | clc |
807 | ret |
||
808 | .notfound: |
||
809 | popa |
||
810 | stc |
||
811 | ret |
||
71 | diamond | 812 | |
83 | diamond | 813 | fd_find_lfn: |
521 | diamond | 814 | ; in: esi+ebp -> name |
83 | diamond | 815 | ; out: CF=1 - file not found |
86 | diamond | 816 | ; else CF=0 and edi->direntry, eax=directory cluster (0 for root) |
83 | diamond | 817 | push esi edi |
818 | push 0 |
||
819 | push flp_root_first |
||
820 | push flp_root_next |
||
821 | .loop: |
||
822 | call fat_find_lfn |
||
823 | jc .notfound |
||
824 | cmp byte [esi], 0 |
||
825 | jz .found |
||
521 | diamond | 826 | .continue: |
83 | diamond | 827 | test byte [edi+11], 10h |
828 | jz .notfound |
||
829 | movzx eax, word [edi+26] ; cluster |
||
830 | mov [esp+8], eax |
||
831 | mov dword [esp+4], flp_notroot_first |
||
832 | mov dword [esp], flp_notroot_next |
||
833 | jmp .loop |
||
834 | .notfound: |
||
835 | add esp, 12 |
||
836 | pop edi esi |
||
837 | stc |
||
838 | ret |
||
839 | .found: |
||
521 | diamond | 840 | test ebp, ebp |
841 | jz @f |
||
842 | mov esi, ebp |
||
843 | xor ebp, ebp |
||
844 | jmp .continue |
||
845 | @@: |
||
86 | diamond | 846 | mov eax, [esp+8] |
131 | diamond | 847 | add eax, 31 |
848 | cmp dword [esp], flp_root_next |
||
849 | jnz @f |
||
850 | add eax, -31+19 |
||
851 | @@: |
||
83 | diamond | 852 | add esp, 16 ; CF=0 |
853 | pop esi |
||
854 | ret |
||
855 | |||
71 | diamond | 856 | ;---------------------------------------------------------------- |
857 | ; |
||
858 | ; fs_FloppyRead - LFN variant for reading floppy |
||
859 | ; |
||
860 | ; esi points to filename |
||
861 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
862 | ; may be ebx=0 - start from first byte |
||
863 | ; ecx number of bytes to read, 0+ |
||
864 | ; edx mem location to return data |
||
865 | ; |
||
77 | diamond | 866 | ; ret ebx = bytes read or 0xffffffff file not found |
71 | diamond | 867 | ; eax = 0 ok read or other = errormsg |
868 | ; |
||
869 | ;-------------------------------------------------------------- |
||
870 | fs_FloppyRead: |
||
75 | diamond | 871 | call read_flp_fat |
872 | cmp byte [esi], 0 |
||
873 | jnz @f |
||
874 | or ebx, -1 |
||
875 | mov eax, 10 ; access denied |
||
876 | ret |
||
71 | diamond | 877 | @@: |
75 | diamond | 878 | push edi |
879 | call fd_find_lfn |
||
880 | jnc .found |
||
881 | pop edi |
||
882 | or ebx, -1 |
||
883 | mov eax, 5 ; file not found |
||
884 | ret |
||
71 | diamond | 885 | .found: |
75 | diamond | 886 | test ebx, ebx |
887 | jz .l1 |
||
888 | cmp dword [ebx+4], 0 |
||
889 | jz @f |
||
77 | diamond | 890 | xor ebx, ebx |
71 | diamond | 891 | .reteof: |
75 | diamond | 892 | mov eax, 6 ; EOF |
893 | pop edi |
||
894 | ret |
||
71 | diamond | 895 | @@: |
75 | diamond | 896 | mov ebx, [ebx] |
71 | diamond | 897 | .l1: |
77 | diamond | 898 | push ecx edx |
899 | push 0 |
||
900 | mov eax, [edi+28] |
||
901 | sub eax, ebx |
||
902 | jb .eof |
||
903 | cmp eax, ecx |
||
904 | jae @f |
||
905 | mov ecx, eax |
||
906 | mov byte [esp], 6 ; EOF |
||
907 | @@: |
||
75 | diamond | 908 | movzx edi, word [edi+26] |
71 | diamond | 909 | .new: |
75 | diamond | 910 | jecxz .done |
911 | test edi, edi |
||
912 | jz .eof |
||
913 | cmp edi, 0xFF8 |
||
914 | jae .eof |
||
113 | diamond | 915 | sub ebx, 512 |
916 | jae .skip |
||
77 | diamond | 917 | lea eax, [edi+31] |
75 | diamond | 918 | pusha |
919 | call read_chs_sector |
||
920 | popa |
||
921 | cmp [FDC_Status], 0 |
||
922 | jnz .err |
||
380 | serge | 923 | lea eax, [FDD_BUFF+ebx+512] |
75 | diamond | 924 | neg ebx |
925 | push ecx |
||
926 | cmp ecx, ebx |
||
927 | jbe @f |
||
928 | mov ecx, ebx |
||
71 | diamond | 929 | @@: |
75 | diamond | 930 | mov ebx, edx |
931 | call memmove |
||
932 | add edx, ecx |
||
933 | sub [esp], ecx |
||
934 | pop ecx |
||
935 | xor ebx, ebx |
||
71 | diamond | 936 | .skip: |
381 | serge | 937 | movzx edi, word [edi*2+FLOPPY_FAT] |
75 | diamond | 938 | jmp .new |
71 | diamond | 939 | .done: |
77 | diamond | 940 | mov ebx, edx |
941 | pop eax edx ecx edi |
||
942 | sub ebx, edx |
||
75 | diamond | 943 | ret |
71 | diamond | 944 | .eof: |
77 | diamond | 945 | mov ebx, edx |
946 | pop eax edx ecx |
||
75 | diamond | 947 | jmp .reteof |
71 | diamond | 948 | .err: |
77 | diamond | 949 | mov ebx, edx |
950 | pop eax edx ecx edi |
||
951 | sub ebx, edx |
||
83 | diamond | 952 | mov al, 11 |
75 | diamond | 953 | ret |
954 | |||
955 | ;---------------------------------------------------------------- |
||
956 | ; |
||
957 | ; fs_FloppyReadFolder - LFN variant for reading floppy folders |
||
958 | ; |
||
959 | ; esi points to filename |
||
78 | diamond | 960 | ; ebx pointer to structure: 32-bit number = first wanted block, 0+ |
961 | ; & flags (bitfields) |
||
962 | ; flags: bit 0: 0=ANSI names, 1=UNICODE names |
||
75 | diamond | 963 | ; ecx number of blocks to read, 0+ |
964 | ; edx mem location to return data |
||
965 | ; |
||
77 | diamond | 966 | ; ret ebx = blocks read or 0xffffffff folder not found |
75 | diamond | 967 | ; eax = 0 ok read or other = errormsg |
968 | ; |
||
969 | ;-------------------------------------------------------------- |
||
970 | fs_FloppyReadFolder: |
||
971 | call read_flp_fat |
||
972 | push edi |
||
973 | cmp byte [esi], 0 |
||
974 | jz .root |
||
975 | call fd_find_lfn |
||
976 | jnc .found |
||
977 | pop edi |
||
978 | or ebx, -1 |
||
979 | mov eax, ERROR_FILE_NOT_FOUND |
||
980 | ret |
||
981 | .found: |
||
982 | test byte [edi+11], 0x10 ; do not allow read files |
||
983 | jnz .found_dir |
||
984 | pop edi |
||
985 | or ebx, -1 |
||
986 | mov eax, ERROR_ACCESS_DENIED |
||
987 | ret |
||
988 | .found_dir: |
||
989 | movzx eax, word [edi+26] |
||
990 | add eax, 31 |
||
991 | push 0 |
||
992 | jmp .doit |
||
993 | .root: |
||
994 | mov eax, 19 |
||
995 | push 14 |
||
996 | .doit: |
||
997 | push ecx ebp |
||
998 | sub esp, 262*2 ; reserve space for LFN |
||
999 | mov ebp, esp |
||
78 | diamond | 1000 | push dword [ebx+4] ; for fat_get_name: read ANSI/UNICODE names |
1001 | mov ebx, [ebx] |
||
75 | diamond | 1002 | ; init header |
1003 | push eax ecx |
||
1004 | mov edi, edx |
||
1005 | mov ecx, 32/4 |
||
1006 | xor eax, eax |
||
1007 | rep stosd |
||
1008 | pop ecx eax |
||
1009 | mov byte [edx], 1 ; version |
||
1010 | mov esi, edi ; esi points to BDFE |
||
1011 | .main_loop: |
||
1012 | pusha |
||
1013 | call read_chs_sector |
||
1014 | popa |
||
1015 | cmp [FDC_Status], 0 |
||
1016 | jnz .error |
||
380 | serge | 1017 | mov edi, FDD_BUFF |
75 | diamond | 1018 | push eax |
1019 | .l1: |
||
1020 | call fat_get_name |
||
1021 | jc .l2 |
||
1022 | cmp byte [edi+11], 0xF |
||
1023 | jnz .do_bdfe |
||
1024 | add edi, 0x20 |
||
465 | serge | 1025 | cmp edi, OS_BASE+0xD200 |
75 | diamond | 1026 | jb .do_bdfe |
1027 | pop eax |
||
1028 | inc eax |
||
1029 | dec byte [esp+262*2+12] |
||
1030 | jz .done |
||
1031 | jns @f |
||
1032 | ; read next sector from FAT |
||
381 | serge | 1033 | mov eax, [(eax-31-1)*2+FLOPPY_FAT] |
75 | diamond | 1034 | and eax, 0xFFF |
1035 | cmp eax, 0xFF8 |
||
1036 | jae .done |
||
1037 | add eax, 31 |
||
1038 | mov byte [esp+262*2+12], 0 |
||
1039 | @@: |
||
1040 | pusha |
||
1041 | call read_chs_sector |
||
1042 | popa |
||
1043 | cmp [FDC_Status], 0 |
||
1044 | jnz .error |
||
380 | serge | 1045 | mov edi, FDD_BUFF |
75 | diamond | 1046 | push eax |
1047 | .do_bdfe: |
||
1048 | inc dword [edx+8] ; new file found |
||
1049 | dec ebx |
||
1050 | jns .l2 |
||
1051 | dec ecx |
||
1052 | js .l2 |
||
1053 | inc dword [edx+4] ; new file block copied |
||
1054 | call fat_entry_to_bdfe |
||
1055 | .l2: |
||
1056 | add edi, 0x20 |
||
465 | serge | 1057 | cmp edi, OS_BASE+0xD200 |
75 | diamond | 1058 | jb .l1 |
1059 | pop eax |
||
1060 | inc eax |
||
1061 | dec byte [esp+262*2+12] |
||
1062 | jz .done |
||
1063 | jns @f |
||
1064 | ; read next sector from FAT |
||
381 | serge | 1065 | mov eax, [(eax-31-1)*2+FLOPPY_FAT] |
75 | diamond | 1066 | and eax, 0xFFF |
1067 | cmp eax, 0xFF8 |
||
1068 | jae .done |
||
1069 | add eax, 31 |
||
1070 | mov byte [esp+262*2+12], 0 |
||
1071 | @@: |
||
1072 | jmp .main_loop |
||
1073 | .error: |
||
1074 | add esp, 262*2+4 |
||
1075 | pop ebp ecx edi edi |
||
1076 | or ebx, -1 |
||
1077 | mov eax, ERROR_FILE_NOT_FOUND |
||
1078 | ret |
||
1079 | .done: |
||
1080 | add esp, 262*2+4 |
||
1081 | pop ebp |
||
77 | diamond | 1082 | mov ebx, [edx+4] |
75 | diamond | 1083 | xor eax, eax |
1084 | dec ecx |
||
1085 | js @f |
||
1086 | mov al, ERROR_END_OF_FILE |
||
1087 | @@: |
||
1088 | pop ecx edi edi |
||
1089 | ret |
||
1090 | |||
83 | diamond | 1091 | ;---------------------------------------------------------------- |
1092 | ; |
||
1093 | ; fs_FloppyRewrite - LFN variant for writing sys floppy |
||
1094 | ; |
||
1095 | ; esi points to filename |
||
1096 | ; ebx ignored (reserved) |
||
1097 | ; ecx number of bytes to write, 0+ |
||
1098 | ; edx mem location to data |
||
1099 | ; |
||
1100 | ; ret ebx = number of written bytes |
||
1101 | ; eax = 0 ok read or other = errormsg |
||
1102 | ; |
||
1103 | ;-------------------------------------------------------------- |
||
1104 | @@: |
||
1105 | mov eax, ERROR_ACCESS_DENIED |
||
1106 | xor ebx, ebx |
||
1107 | ret |
||
1108 | fsfrfe2: |
||
1109 | popad |
||
1110 | fsfrfe: |
||
1111 | mov eax, 11 |
||
1112 | xor ebx, ebx |
||
1113 | ret |
||
1114 | |||
321 | diamond | 1115 | fs_FloppyCreateFolder: |
1116 | mov al, 1 |
||
1117 | jmp fs_FloppyRewrite.common |
||
1118 | |||
83 | diamond | 1119 | fs_FloppyRewrite: |
321 | diamond | 1120 | xor eax, eax |
1121 | .common: |
||
83 | diamond | 1122 | cmp byte [esi], 0 |
1123 | jz @b |
||
1124 | call read_flp_fat |
||
1125 | cmp [FDC_Status], 0 |
||
1126 | jnz fsfrfe |
||
1127 | pushad |
||
521 | diamond | 1128 | xor edi, edi |
83 | diamond | 1129 | push esi |
521 | diamond | 1130 | test ebp, ebp |
1131 | jz @f |
||
1132 | mov esi, ebp |
||
83 | diamond | 1133 | @@: |
1134 | lodsb |
||
1135 | test al, al |
||
1136 | jz @f |
||
1137 | cmp al, '/' |
||
1138 | jnz @b |
||
521 | diamond | 1139 | lea edi, [esi-1] |
83 | diamond | 1140 | jmp @b |
1141 | @@: |
||
1142 | pop esi |
||
521 | diamond | 1143 | test edi, edi |
1144 | jnz .noroot |
||
83 | diamond | 1145 | test ebp, ebp |
521 | diamond | 1146 | jnz .hasebp |
83 | diamond | 1147 | call read_flp_root |
1148 | cmp [FDC_Status], 0 |
||
1149 | jnz fsfrfe2 |
||
1150 | push flp_rootmem_extend_dir |
||
1151 | push flp_rootmem_end_write |
||
1152 | push flp_rootmem_next_write |
||
1153 | push flp_rootmem_begin_write |
||
1154 | xor ebp, ebp |
||
1155 | push ebp |
||
1156 | push flp_rootmem_first |
||
1157 | push flp_rootmem_next |
||
1158 | jmp .common1 |
||
521 | diamond | 1159 | .hasebp: |
1160 | mov eax, ERROR_ACCESS_DENIED |
||
1161 | cmp byte [ebp], 0 |
||
1162 | jz .ret1 |
||
1163 | push ebp |
||
1164 | xor ebp, ebp |
||
1165 | call fd_find_lfn |
||
1166 | pop esi |
||
1167 | jc .notfound0 |
||
1168 | jmp .common0 |
||
83 | diamond | 1169 | .noroot: |
335 | diamond | 1170 | mov eax, ERROR_ACCESS_DENIED |
521 | diamond | 1171 | cmp byte [edi+1], 0 |
335 | diamond | 1172 | jz .ret1 |
83 | diamond | 1173 | ; check existence |
521 | diamond | 1174 | mov byte [edi], 0 |
1175 | push edi |
||
83 | diamond | 1176 | call fd_find_lfn |
521 | diamond | 1177 | pop esi |
1178 | mov byte [esi], '/' |
||
83 | diamond | 1179 | jnc @f |
521 | diamond | 1180 | .notfound0: |
83 | diamond | 1181 | mov eax, ERROR_FILE_NOT_FOUND |
1182 | .ret1: |
||
1183 | mov [esp+28], eax |
||
1184 | popad |
||
1185 | xor ebx, ebx |
||
1186 | ret |
||
1187 | @@: |
||
521 | diamond | 1188 | inc esi |
1189 | .common0: |
||
83 | diamond | 1190 | test byte [edi+11], 0x10 ; must be directory |
1191 | mov eax, ERROR_ACCESS_DENIED |
||
1192 | jz .ret1 |
||
1193 | movzx ebp, word [edi+26] ; ebp=cluster |
||
1194 | mov eax, ERROR_FAT_TABLE |
||
1195 | cmp ebp, 2 |
||
1196 | jb .ret1 |
||
1197 | cmp ebp, 2849 |
||
1198 | jae .ret1 |
||
1199 | push flp_notroot_extend_dir |
||
1200 | push flp_notroot_end_write |
||
1201 | push flp_notroot_next_write |
||
1202 | push flp_notroot_begin_write |
||
1203 | push ebp |
||
1204 | push flp_notroot_first |
||
1205 | push flp_notroot_next |
||
1206 | .common1: |
||
1207 | call fat_find_lfn |
||
1208 | jc .notfound |
||
321 | diamond | 1209 | ; found |
91 | diamond | 1210 | test byte [edi+11], 10h |
321 | diamond | 1211 | jz .exists_file |
1212 | ; found directory; if we are creating directory, return OK, |
||
1213 | ; if we are creating file, say "access denied" |
||
1214 | add esp, 28 |
||
1215 | popad |
||
1216 | test al, al |
||
1217 | mov eax, ERROR_ACCESS_DENIED |
||
91 | diamond | 1218 | jz @f |
321 | diamond | 1219 | mov al, 0 |
1220 | @@: |
||
1221 | xor ebx, ebx |
||
1222 | ret |
||
1223 | .exists_file: |
||
1224 | ; found file; if we are creating directory, return "access denied", |
||
1225 | ; if we are creating file, delete existing file and continue |
||
1226 | cmp byte [esp+28+28], 0 |
||
1227 | jz @f |
||
91 | diamond | 1228 | add esp, 28 |
1229 | popad |
||
1230 | mov eax, ERROR_ACCESS_DENIED |
||
1231 | xor ebx, ebx |
||
1232 | ret |
||
1233 | @@: |
||
1234 | ; delete FAT chain |
||
83 | diamond | 1235 | push edi |
1236 | xor eax, eax |
||
1237 | mov dword [edi+28], eax ; zero size |
||
1238 | xchg ax, word [edi+26] ; start cluster |
||
1239 | test eax, eax |
||
1240 | jz .done1 |
||
1241 | @@: |
||
1242 | cmp eax, 0xFF8 |
||
1243 | jae .done1 |
||
321 | diamond | 1244 | lea edi, [FLOPPY_FAT + eax*2] ; position in FAT |
83 | diamond | 1245 | xor eax, eax |
1246 | xchg ax, [edi] |
||
1247 | jmp @b |
||
1248 | .done1: |
||
1249 | pop edi |
||
1250 | call get_time_for_file |
||
1251 | mov [edi+22], ax |
||
1252 | call get_date_for_file |
||
1253 | mov [edi+24], ax |
||
1254 | mov [edi+18], ax |
||
1255 | or byte [edi+11], 20h ; set 'archive' attribute |
||
1256 | jmp .doit |
||
1257 | .notfound: |
||
1258 | ; file is not found; generate short name |
||
1259 | call fat_name_is_legal |
||
1260 | jc @f |
||
1261 | add esp, 28 |
||
1262 | popad |
||
1263 | mov eax, ERROR_FILE_NOT_FOUND |
||
1264 | xor ebx, ebx |
||
1265 | ret |
||
1266 | @@: |
||
1267 | sub esp, 12 |
||
1268 | mov edi, esp |
||
1269 | call fat_gen_short_name |
||
1270 | .test_short_name_loop: |
||
1271 | push esi edi ecx |
||
1272 | mov esi, edi |
||
1273 | lea eax, [esp+12+12+8] |
||
1274 | mov [eax], ebp |
||
1275 | call dword [eax-4] |
||
1276 | jc .found |
||
1277 | .test_short_name_entry: |
||
1278 | cmp byte [edi+11], 0xF |
||
1279 | jz .test_short_name_cont |
||
1280 | mov ecx, 11 |
||
1281 | push esi edi |
||
1282 | repz cmpsb |
||
1283 | pop edi esi |
||
1284 | jz .short_name_found |
||
1285 | .test_short_name_cont: |
||
1286 | lea eax, [esp+12+12+8] |
||
1287 | call dword [eax-8] |
||
1288 | jnc .test_short_name_entry |
||
1289 | jmp .found |
||
1290 | .short_name_found: |
||
1291 | pop ecx edi esi |
||
1292 | call fat_next_short_name |
||
1293 | jnc .test_short_name_loop |
||
1294 | .disk_full: |
||
1295 | add esp, 12+28 |
||
1296 | popa |
||
1297 | mov eax, ERROR_DISK_FULL |
||
1298 | xor ebx, ebx |
||
1299 | ret |
||
1300 | .found: |
||
1301 | pop ecx edi esi |
||
1302 | ; now find space in directory |
||
1303 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
||
1304 | mov al, '~' |
||
1305 | push ecx edi |
||
1306 | mov ecx, 8 |
||
1307 | repnz scasb |
||
1308 | push 1 |
||
1309 | pop eax ; 1 entry |
||
1310 | jnz .notilde |
||
1311 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
||
1312 | xor eax, eax |
||
1313 | @@: |
||
1314 | cmp byte [esi], 0 |
||
1315 | jz @f |
||
1316 | inc esi |
||
1317 | inc eax |
||
1318 | jmp @b |
||
1319 | @@: |
||
1320 | sub esi, eax |
||
1321 | add eax, 12+13 |
||
1322 | mov ecx, 13 |
||
1323 | push edx |
||
1324 | cdq |
||
1325 | div ecx |
||
1326 | pop edx |
||
1327 | .notilde: |
||
1328 | push -1 |
||
1329 | push -1 |
||
1330 | ; find |
||
1331 | xor ecx, ecx |
||
1332 | push eax |
||
1333 | lea eax, [esp+12+8+12+8] |
||
1334 | mov [eax], ebp |
||
1335 | call dword [eax-4] |
||
1336 | pop eax |
||
1337 | jnc .scan_dir |
||
1338 | .fsfrfe3: |
||
1339 | add esp, 8+8+12+28 |
||
1340 | popad |
||
1341 | mov eax, 11 |
||
1342 | xor ebx, ebx |
||
1343 | ret |
||
1344 | .scan_dir: |
||
1345 | cmp byte [edi], 0 |
||
1346 | jz .free |
||
1347 | cmp byte [edi], 0xE5 |
||
1348 | jz .free |
||
1349 | xor ecx, ecx |
||
1350 | .scan_cont: |
||
1351 | push eax |
||
1352 | lea eax, [esp+12+8+12+8] |
||
1353 | call dword [eax-8] |
||
1354 | pop eax |
||
1355 | jnc .scan_dir |
||
1356 | cmp [FDC_Status], 0 |
||
1357 | jnz .fsfrfe3 |
||
1358 | push eax |
||
1359 | lea eax, [esp+12+8+12+8] |
||
1360 | call dword [eax+16] ; extend directory |
||
1361 | pop eax |
||
1362 | jnc .scan_dir |
||
1363 | add esp, 8+8+12+28 |
||
1364 | popad |
||
1365 | mov eax, ERROR_DISK_FULL |
||
1366 | xor ebx, ebx |
||
1367 | ret |
||
1368 | .free: |
||
1369 | test ecx, ecx |
||
1370 | jnz @f |
||
1371 | mov [esp], edi |
||
1372 | mov ecx, [esp+8+8+12+8] |
||
1373 | mov [esp+4], ecx |
||
1374 | xor ecx, ecx |
||
1375 | @@: |
||
1376 | inc ecx |
||
1377 | cmp ecx, eax |
||
1378 | jb .scan_cont |
||
1379 | ; found! |
||
1380 | ; calculate name checksum |
||
1381 | push esi ecx |
||
1382 | mov esi, [esp+8+8] |
||
1383 | mov ecx, 11 |
||
1384 | xor eax, eax |
||
1385 | @@: |
||
1386 | ror al, 1 |
||
1387 | add al, [esi] |
||
1388 | inc esi |
||
1389 | loop @b |
||
1390 | pop ecx esi |
||
1391 | pop edi |
||
1392 | pop dword [esp+8+12+8] |
||
1393 | ; edi points to first entry in free chunk |
||
1394 | dec ecx |
||
1395 | jz .nolfn |
||
1396 | push esi |
||
1397 | push eax |
||
1398 | lea eax, [esp+8+8+12+8] |
||
1399 | call dword [eax+4] ; begin write |
||
1400 | mov al, 40h |
||
1401 | .writelfn: |
||
1402 | or al, cl |
||
1403 | mov esi, [esp+4] |
||
1404 | push ecx |
||
1405 | dec ecx |
||
1406 | imul ecx, 13 |
||
1407 | add esi, ecx |
||
1408 | stosb |
||
1409 | mov cl, 5 |
||
1410 | call fs_RamdiskRewrite.read_symbols |
||
1411 | mov ax, 0xF |
||
1412 | stosw |
||
1413 | mov al, [esp+4] |
||
1414 | stosb |
||
1415 | mov cl, 6 |
||
1416 | call fs_RamdiskRewrite.read_symbols |
||
1417 | xor eax, eax |
||
1418 | stosw |
||
1419 | mov cl, 2 |
||
1420 | call fs_RamdiskRewrite.read_symbols |
||
1421 | pop ecx |
||
1422 | lea eax, [esp+8+8+12+8] |
||
1423 | call dword [eax+8] ; next write |
||
1424 | xor eax, eax |
||
1425 | loop .writelfn |
||
1426 | pop eax |
||
1427 | pop esi |
||
1428 | ; lea eax, [esp+8+12+8] |
||
1429 | ; call dword [eax+12] ; end write |
||
1430 | .nolfn: |
||
1431 | xchg esi, [esp] |
||
1432 | mov ecx, 11 |
||
1433 | rep movsb |
||
1434 | mov word [edi], 20h ; attributes |
||
1435 | sub edi, 11 |
||
1436 | pop esi ecx |
||
1437 | add esp, 12 |
||
1438 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
||
1439 | call get_time_for_file |
||
1440 | mov [edi+14], ax ; creation time |
||
1441 | mov [edi+22], ax ; last write time |
||
1442 | call get_date_for_file |
||
1443 | mov [edi+16], ax ; creation date |
||
1444 | mov [edi+24], ax ; last write date |
||
1445 | mov [edi+18], ax ; last access date |
||
1446 | and word [edi+20], 0 ; high word of cluster |
||
1447 | and word [edi+26], 0 ; low word of cluster - to be filled |
||
1448 | and dword [edi+28], 0 ; file size - to be filled |
||
321 | diamond | 1449 | cmp byte [esp+28+28], 0 |
1450 | jz .doit |
||
1451 | ; create directory |
||
1452 | mov byte [edi+11], 10h ; attributes: folder |
||
1453 | mov ecx, 32*2 |
||
1454 | mov edx, edi |
||
83 | diamond | 1455 | .doit: |
1456 | lea eax, [esp+8] |
||
1457 | call dword [eax+12] ; flush directory |
||
1458 | push ecx |
||
1459 | push edi |
||
133 | diamond | 1460 | push 0 |
83 | diamond | 1461 | mov esi, edx |
321 | diamond | 1462 | test ecx, ecx |
1463 | jz .done |
||
83 | diamond | 1464 | mov ecx, 2849 |
321 | diamond | 1465 | mov edi, FLOPPY_FAT |
83 | diamond | 1466 | push 0 ; first cluster |
1467 | .write_loop: |
||
1468 | ; allocate new cluster |
||
1469 | xor eax, eax |
||
1470 | repnz scasw |
||
1471 | mov al, ERROR_DISK_FULL |
||
1472 | jnz .ret |
||
1473 | dec edi |
||
1474 | dec edi |
||
465 | serge | 1475 | |
1476 | mov eax, edi |
||
1477 | sub eax, FLOPPY_FAT |
||
1478 | |||
83 | diamond | 1479 | shr eax, 1 ; eax = cluster |
1480 | mov word [edi], 0xFFF ; mark as last cluster |
||
133 | diamond | 1481 | xchg edi, [esp+4] |
83 | diamond | 1482 | cmp dword [esp], 0 |
1483 | jz .first |
||
1484 | stosw |
||
1485 | jmp @f |
||
1486 | .first: |
||
1487 | mov [esp], eax |
||
1488 | @@: |
||
133 | diamond | 1489 | mov edi, [esp+4] |
83 | diamond | 1490 | inc ecx |
1491 | ; write data |
||
1492 | push ecx edi |
||
1493 | mov ecx, 512 |
||
1494 | cmp dword [esp+20], ecx |
||
1495 | jae @f |
||
1496 | mov ecx, [esp+20] |
||
1497 | @@: |
||
380 | serge | 1498 | mov edi, FDD_BUFF |
321 | diamond | 1499 | cmp byte [esp+24+28+28], 0 |
1500 | jnz .writedir |
||
83 | diamond | 1501 | push ecx |
1502 | rep movsb |
||
1503 | pop ecx |
||
321 | diamond | 1504 | .writedircont: |
83 | diamond | 1505 | push ecx |
1506 | sub ecx, 512 |
||
1507 | neg ecx |
||
1508 | push eax |
||
1509 | xor eax, eax |
||
1510 | rep stosb |
||
1511 | pop eax |
||
1512 | add eax, 31 |
||
1513 | pusha |
||
1514 | call save_chs_sector |
||
1515 | popa |
||
1516 | pop ecx |
||
1517 | cmp [FDC_Status], 0 |
||
1518 | jnz .diskerr |
||
1519 | sub [esp+20], ecx |
||
1520 | pop edi ecx |
||
1521 | jnz .write_loop |
||
1522 | .done: |
||
1523 | xor eax, eax |
||
1524 | .ret: |
||
1525 | pop ebx edi edi ecx |
||
1526 | mov [esp+28+28], eax |
||
1527 | lea eax, [esp+8] |
||
1528 | call dword [eax+4] |
||
1529 | mov [edi+26], bx |
||
1530 | mov ebx, esi |
||
1531 | sub ebx, edx |
||
1532 | mov [edi+28], ebx |
||
1533 | call dword [eax+12] |
||
1534 | mov [esp+28+16], ebx |
||
1535 | test ebp, ebp |
||
1536 | jnz @f |
||
1537 | call save_flp_root |
||
1538 | @@: |
||
1539 | add esp, 28 |
||
1540 | cmp [FDC_Status], 0 |
||
1541 | jnz .err3 |
||
1542 | call save_flp_fat |
||
1543 | cmp [FDC_Status], 0 |
||
1544 | jnz .err3 |
||
1545 | popa |
||
1546 | ret |
||
1547 | .err3: |
||
1548 | popa |
||
1549 | mov al, 11 |
||
1550 | xor ebx, ebx |
||
1551 | ret |
||
1552 | .diskerr: |
||
1553 | sub esi, ecx |
||
1554 | mov eax, 11 |
||
1555 | pop edi ecx |
||
1556 | jmp .ret |
||
321 | diamond | 1557 | .writedir: |
1558 | push ecx |
||
1559 | mov ecx, 32/4 |
||
1560 | push ecx esi |
||
1561 | rep movsd |
||
1562 | pop esi ecx |
||
1563 | mov dword [edi-32], '. ' |
||
1564 | mov dword [edi-32+4], ' ' |
||
1565 | mov dword [edi-32+8], ' ' |
||
1566 | mov byte [edi-32+11], 10h |
||
1567 | mov word [edi-32+26], ax |
||
1568 | push esi |
||
1569 | rep movsd |
||
1570 | pop esi |
||
1571 | mov dword [edi-32], '.. ' |
||
1572 | mov dword [edi-32+4], ' ' |
||
1573 | mov dword [edi-32+8], ' ' |
||
1574 | mov byte [edi-32+11], 10h |
||
1575 | mov ecx, [esp+28+8] |
||
1576 | mov word [edi-32+26], cx |
||
1577 | pop ecx |
||
1578 | jmp .writedircont |
||
83 | diamond | 1579 | |
131 | diamond | 1580 | ;---------------------------------------------------------------- |
1581 | ; |
||
1582 | ; fs_FloppyWrite - LFN variant for writing to floppy |
||
1583 | ; |
||
1584 | ; esi points to filename |
||
1585 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
1586 | ; may be ebx=0 - start from first byte |
||
1587 | ; ecx number of bytes to write, 0+ |
||
1588 | ; edx mem location to data |
||
1589 | ; |
||
1590 | ; ret ebx = bytes written (maybe 0) |
||
1591 | ; eax = 0 ok write or other = errormsg |
||
1592 | ; |
||
1593 | ;-------------------------------------------------------------- |
||
1594 | |||
1595 | @@: |
||
1596 | push ERROR_ACCESS_DENIED |
||
1597 | fs_FloppyWrite.ret0: |
||
1598 | pop eax |
||
1599 | xor ebx, ebx |
||
1600 | ret |
||
1601 | |||
1602 | fs_FloppyWrite.ret11: |
||
1603 | push 11 |
||
1604 | jmp fs_FloppyWrite.ret0 |
||
1605 | |||
1606 | fs_FloppyWrite: |
||
1607 | cmp byte [esi], 0 |
||
1608 | jz @b |
||
1609 | call read_flp_fat |
||
1610 | cmp [FDC_Status], 0 |
||
1611 | jnz .ret11 |
||
1612 | pushad |
||
1613 | call fd_find_lfn |
||
1614 | jnc .found |
||
1615 | popad |
||
1616 | push ERROR_FILE_NOT_FOUND |
||
1617 | jmp .ret0 |
||
1618 | .found: |
||
1619 | ; FAT does not support files larger than 4GB |
||
1620 | test ebx, ebx |
||
1621 | jz .l1 |
||
1622 | cmp dword [ebx+4], 0 |
||
1623 | jz @f |
||
1624 | .eof: |
||
1625 | popad |
||
1626 | push ERROR_END_OF_FILE |
||
1627 | jmp .ret0 |
||
1628 | @@: |
||
1629 | mov ebx, [ebx] |
||
1630 | .l1: |
||
1631 | ; now edi points to direntry, ebx=start byte to write, |
||
1632 | ; ecx=number of bytes to write, edx=data pointer |
||
1633 | |||
1634 | ; extend file if needed |
||
1635 | add ecx, ebx |
||
1636 | jc .eof ; FAT does not support files larger than 4GB |
||
1637 | push eax ; save directory cluster |
||
1638 | push 0 ; return value=0 |
||
1639 | |||
1640 | call get_time_for_file |
||
1641 | mov [edi+22], ax ; last write time |
||
1642 | call get_date_for_file |
||
1643 | mov [edi+24], ax ; last write date |
||
1644 | mov [edi+18], ax ; last access date |
||
1645 | |||
1646 | push dword [edi+28] ; save current file size |
||
1647 | cmp ecx, [edi+28] |
||
1648 | jbe .length_ok |
||
1649 | cmp ecx, ebx |
||
1650 | jz .length_ok |
||
1651 | call floppy_extend_file |
||
1652 | jnc .length_ok |
||
1653 | mov [esp+4], eax |
||
1654 | ; floppy_extend_file can return two error codes: FAT table error or disk full. |
||
1655 | ; First case is fatal error, in second case we may write some data |
||
1656 | cmp al, ERROR_DISK_FULL |
||
1657 | jz .disk_full |
||
1658 | pop eax |
||
1659 | pop eax |
||
1660 | mov [esp+4+28], eax |
||
1661 | pop eax |
||
1662 | popad |
||
1663 | xor ebx, ebx |
||
1664 | ret |
||
1665 | .disk_full: |
||
1666 | ; correct number of bytes to write |
||
1667 | mov ecx, [edi+28] |
||
1668 | cmp ecx, ebx |
||
1669 | ja .length_ok |
||
1670 | .ret: |
||
1671 | pop eax |
||
1672 | pop eax |
||
1673 | mov [esp+4+28], eax ; eax=return value |
||
1674 | pop eax |
||
1675 | sub edx, [esp+20] |
||
1676 | mov [esp+16], edx ; ebx=number of written bytes |
||
1677 | popad |
||
1678 | ret |
||
1679 | .length_ok: |
||
1680 | ; save FAT & directory |
||
1681 | ; note that directory must be saved first because save_flp_fat uses buffer at 0xD000 |
||
1682 | mov esi, [edi+28] |
||
1683 | movzx edi, word [edi+26] ; starting cluster |
||
1684 | mov eax, [esp+8] |
||
1685 | pusha |
||
1686 | call save_chs_sector |
||
1687 | popa |
||
1688 | cmp [FDC_Status], 0 |
||
1689 | jnz .device_err |
||
1690 | call save_flp_fat |
||
1691 | cmp [FDC_Status], 0 |
||
1692 | jz @f |
||
1693 | .device_err: |
||
1694 | mov byte [esp+4], 11 |
||
1695 | jmp .ret |
||
1696 | @@: |
||
1697 | |||
1698 | ; now ebx=start pos, ecx=end pos, both lie inside file |
||
1699 | sub ecx, ebx |
||
1700 | jz .ret |
||
1701 | call SetUserInterrupts |
||
1702 | .write_loop: |
||
321 | diamond | 1703 | ; skip unmodified sectors |
1704 | cmp dword [esp], 0x200 |
||
1705 | jb .modify |
||
1706 | sub ebx, 0x200 |
||
1707 | jae .skip |
||
1708 | add ebx, 0x200 |
||
1709 | .modify: |
||
131 | diamond | 1710 | lea eax, [edi+31] ; current sector |
1711 | ; get length of data in current sector |
||
1712 | push ecx |
||
1713 | sub ebx, 0x200 |
||
1714 | jb .hasdata |
||
1715 | neg ebx |
||
1716 | xor ecx, ecx |
||
1717 | jmp @f |
||
1718 | .hasdata: |
||
1719 | neg ebx |
||
1720 | cmp ecx, ebx |
||
1721 | jbe @f |
||
1722 | mov ecx, ebx |
||
1723 | @@: |
||
1724 | ; load sector if needed |
||
1725 | cmp dword [esp+4], 0 ; we don't need to read uninitialized data |
||
1726 | jz .noread |
||
1727 | cmp ecx, 0x200 ; we don't need to read sector if it is fully rewritten |
||
1728 | jz .noread |
||
1729 | cmp ecx, esi ; (same for the last sector) |
||
1730 | jz .noread |
||
1731 | pusha |
||
1732 | call read_chs_sector |
||
1733 | popa |
||
1734 | cmp [FDC_Status], 0 |
||
1735 | jz @f |
||
1736 | .device_err2: |
||
1737 | pop ecx |
||
1738 | jmp .device_err |
||
1739 | @@: |
||
1740 | .noread: |
||
1741 | ; zero uninitialized data if file was extended (because floppy_extend_file does not this) |
||
1742 | push eax ecx edi |
||
1743 | xor eax, eax |
||
1744 | mov ecx, 0x200 |
||
1745 | sub ecx, [esp+4+12] |
||
1746 | jbe @f |
||
380 | serge | 1747 | mov edi, FDD_BUFF |
131 | diamond | 1748 | add edi, [esp+4+12] |
1749 | rep stosb |
||
1750 | @@: |
||
1751 | ; zero uninitialized data in the last sector |
||
1752 | mov ecx, 0x200 |
||
1753 | sub ecx, esi |
||
1754 | jbe @f |
||
380 | serge | 1755 | mov edi, FDD_BUFF |
131 | diamond | 1756 | add edi, esi |
1757 | rep stosb |
||
1758 | @@: |
||
1759 | pop edi ecx eax |
||
1760 | ; copy new data |
||
1761 | push eax |
||
1762 | mov eax, edx |
||
1763 | neg ebx |
||
1764 | jecxz @f |
||
380 | serge | 1765 | add ebx, FDD_BUFF+0x200 |
131 | diamond | 1766 | call memmove |
1767 | xor ebx, ebx |
||
1768 | @@: |
||
1769 | pop eax |
||
1770 | ; save sector |
||
1771 | pusha |
||
1772 | call save_chs_sector |
||
1773 | popa |
||
1774 | cmp [FDC_Status], 0 |
||
1775 | jnz .device_err2 |
||
1776 | add edx, ecx |
||
1777 | sub [esp], ecx |
||
1778 | pop ecx |
||
1779 | jz .done |
||
321 | diamond | 1780 | .skip: |
131 | diamond | 1781 | .next_cluster: |
381 | serge | 1782 | movzx edi, word [edi*2+FLOPPY_FAT] |
131 | diamond | 1783 | sub esi, 0x200 |
1784 | jae @f |
||
1785 | xor esi, esi |
||
1786 | @@: |
||
1787 | sub dword [esp], 0x200 |
||
1788 | jae .write_loop |
||
1789 | and dword [esp], 0 |
||
1790 | jmp .write_loop |
||
1791 | .done: |
||
1792 | mov [fdc_irq_func], fdc_null |
||
1793 | jmp .ret |
||
1794 | |||
1795 | floppy_extend_file.zero_size: |
||
1796 | xor eax, eax |
||
1797 | jmp floppy_extend_file.start_extend |
||
1798 | |||
1799 | ; extends file on floppy to given size (new data area is undefined) |
||
1800 | ; in: edi->direntry, ecx=new size |
||
133 | diamond | 1801 | ; out: CF=0 => OK, eax=0 |
131 | diamond | 1802 | ; CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL) |
1803 | floppy_extend_file: |
||
1804 | push ecx |
||
1805 | ; find the last cluster of file |
||
1806 | movzx eax, word [edi+26] ; first cluster |
||
1807 | mov ecx, [edi+28] |
||
1808 | jecxz .zero_size |
||
1809 | @@: |
||
1810 | sub ecx, 0x200 |
||
1811 | jbe @f |
||
381 | serge | 1812 | mov eax, [eax*2+FLOPPY_FAT] |
131 | diamond | 1813 | and eax, 0xFFF |
1814 | jz .fat_err |
||
1815 | cmp eax, 0xFF8 |
||
1816 | jb @b |
||
1817 | .fat_err: |
||
1818 | pop ecx |
||
1819 | push ERROR_FAT_TABLE |
||
1820 | pop eax |
||
1821 | stc |
||
1822 | ret |
||
1823 | @@: |
||
1824 | push eax |
||
381 | serge | 1825 | mov eax, [eax*2+FLOPPY_FAT] |
131 | diamond | 1826 | and eax, 0xFFF |
1827 | cmp eax, 0xFF8 |
||
1828 | pop eax |
||
1829 | jb .fat_err |
||
1830 | ; set length to full number of sectors |
||
1831 | sub [edi+28], ecx |
||
1832 | .start_extend: |
||
1833 | pop ecx |
||
1834 | ; now do extend |
||
1835 | push edx esi |
||
381 | serge | 1836 | mov esi, FLOPPY_FAT+2*2 ; start scan from cluster 2 |
131 | diamond | 1837 | mov edx, 2847 ; number of clusters to scan |
1838 | .extend_loop: |
||
1839 | cmp [edi+28], ecx |
||
1840 | jae .extend_done |
||
1841 | ; add new sector |
||
1842 | push ecx |
||
1843 | push edi |
||
1844 | .scan: |
||
1845 | mov ecx, edx |
||
1846 | mov edi, esi |
||
1847 | jecxz .disk_full |
||
1848 | push eax |
||
1849 | xor eax, eax |
||
1850 | repnz scasw |
||
1851 | pop eax |
||
1852 | jnz .disk_full |
||
1853 | mov word [edi-2], 0xFFF |
||
1854 | mov esi, edi |
||
1855 | mov edx, ecx |
||
381 | serge | 1856 | sub edi, FLOPPY_FAT |
131 | diamond | 1857 | shr edi, 1 |
1858 | dec edi ; now edi=new cluster |
||
1859 | test eax, eax |
||
1860 | jz .first_cluster |
||
381 | serge | 1861 | mov [FLOPPY_FAT+eax*2], di |
131 | diamond | 1862 | jmp @f |
1863 | .first_cluster: |
||
1864 | pop eax ; eax->direntry |
||
1865 | push eax |
||
1866 | mov [eax+26], di |
||
1867 | @@: |
||
1868 | mov eax, edi ; eax=new cluster |
||
1869 | pop edi ; edi->direntry |
||
1870 | pop ecx ; ecx=required size |
||
1871 | add dword [edi+28], 0x200 |
||
1872 | jmp .extend_loop |
||
1873 | .extend_done: |
||
1874 | mov [edi+28], ecx |
||
1875 | pop esi edx |
||
133 | diamond | 1876 | xor eax, eax ; CF=0 |
131 | diamond | 1877 | ret |
1878 | .disk_full: |
||
1879 | pop edi ecx |
||
1880 | pop esi edx |
||
1881 | stc |
||
1882 | push ERROR_DISK_FULL |
||
1883 | pop eax |
||
1884 | ret |
||
1885 | |||
133 | diamond | 1886 | ;---------------------------------------------------------------- |
1887 | ; |
||
1888 | ; fs_FloppySetFileEnd - set end of file on floppy |
||
1889 | ; |
||
1890 | ; esi points to filename |
||
1891 | ; ebx points to 64-bit number = new file size |
||
1892 | ; ecx ignored (reserved) |
||
1893 | ; edx ignored (reserved) |
||
1894 | ; |
||
1895 | ; ret eax = 0 ok or other = errormsg |
||
1896 | ; |
||
1897 | ;-------------------------------------------------------------- |
||
1898 | fs_FloppySetFileEnd: |
||
1899 | call read_flp_fat |
||
1900 | cmp [FDC_Status], 0 |
||
1901 | jnz ret11 |
||
1902 | cmp byte [esi], 0 |
||
1903 | jnz @f |
||
1904 | .access_denied: |
||
1905 | push ERROR_ACCESS_DENIED |
||
1906 | jmp .ret |
||
1907 | @@: |
||
1908 | push edi |
||
1909 | call fd_find_lfn |
||
1910 | jnc @f |
||
1911 | pop edi |
||
1912 | push ERROR_FILE_NOT_FOUND |
||
1913 | .ret: |
||
1914 | pop eax |
||
1915 | jmp .doret |
||
1916 | @@: |
||
1917 | ; must not be directory |
||
1918 | test byte [edi+11], 10h |
||
1919 | jz @f |
||
1920 | pop edi |
||
1921 | jmp .access_denied |
||
1922 | @@: |
||
1923 | ; file size must not exceed 4 Gb |
||
1924 | cmp dword [ebx+4], 0 |
||
1925 | jz @f |
||
1926 | pop edi |
||
1927 | push ERROR_END_OF_FILE |
||
1928 | jmp .ret |
||
1929 | @@: |
||
1930 | push eax |
||
1931 | ; set file modification date/time to current |
||
1932 | call fat_update_datetime |
||
1933 | mov eax, [ebx] |
||
1934 | cmp eax, [edi+28] |
||
1935 | jb .truncate |
||
1936 | ja .expand |
||
1937 | pop eax |
||
1938 | pushad |
||
1939 | call save_chs_sector |
||
1940 | popad |
||
1941 | pop edi |
||
1942 | xor eax, eax |
||
1943 | cmp [FDC_Status], 0 |
||
1944 | jz @f |
||
1945 | mov al, 11 |
||
1946 | @@: |
||
1947 | .doret: |
||
1948 | mov [fdc_irq_func], fdc_null |
||
1949 | ret |
||
1950 | .expand: |
||
1951 | push ecx |
||
1952 | push dword [edi+28] ; save old size |
||
1953 | mov ecx, eax |
||
1954 | call floppy_extend_file |
||
1955 | push eax ; return code |
||
1956 | jnc .expand_ok |
||
1957 | cmp al, ERROR_DISK_FULL |
||
1958 | jz .disk_full |
||
1959 | pop eax ecx ecx edi edi |
||
1960 | jmp .doret |
||
1961 | .device_err: |
||
1962 | pop eax |
||
1963 | .device_err2: |
||
1964 | pop ecx ecx eax edi |
||
1965 | push 11 |
||
1966 | jmp .ret |
||
1967 | .disk_full: |
||
1968 | .expand_ok: |
||
1969 | ; save directory & FAT |
||
1970 | mov eax, [edi+28] |
||
1971 | xchg eax, [esp+12] |
||
1972 | movzx edi, word [edi+26] |
||
1973 | pusha |
||
1974 | call save_chs_sector |
||
1975 | popa |
||
1976 | cmp [FDC_Status], 0 |
||
1977 | jnz .device_err |
||
1978 | call save_flp_fat |
||
1979 | cmp [FDC_Status], 0 |
||
1980 | jnz .device_err |
||
1981 | call SetUserInterrupts |
||
1982 | ; now zero new data |
||
1983 | ; edi = current cluster, [esp+12]=new size, [esp+4]=old size, [esp]=return code |
||
1984 | .zero_loop: |
||
1985 | sub dword [esp+4], 0x200 |
||
1986 | jae .next_cluster |
||
1987 | cmp dword [esp+4], -0x200 |
||
1988 | jz .noread |
||
1989 | lea eax, [edi+31] |
||
1990 | pusha |
||
1991 | call read_chs_sector |
||
1992 | popa |
||
1993 | cmp [FDC_Status], 0 |
||
1994 | jnz .err_next |
||
1995 | .noread: |
||
1996 | mov ecx, [esp+4] |
||
1997 | neg ecx |
||
1998 | push edi |
||
380 | serge | 1999 | mov edi, FDD_BUFF+0x200 |
133 | diamond | 2000 | add edi, [esp+8] |
2001 | xor eax, eax |
||
2002 | mov [esp+8], eax |
||
2003 | rep stosb |
||
2004 | pop edi |
||
2005 | lea eax, [edi+31] |
||
2006 | pusha |
||
2007 | call save_chs_sector |
||
2008 | popa |
||
2009 | cmp [FDC_Status], 0 |
||
2010 | jz .next_cluster |
||
2011 | .err_next: |
||
2012 | mov byte [esp], 11 |
||
2013 | .next_cluster: |
||
2014 | sub dword [esp+12], 0x200 |
||
2015 | jbe .expand_done |
||
381 | serge | 2016 | movzx edi, word [FLOPPY_FAT+edi*2] |
133 | diamond | 2017 | jmp .zero_loop |
2018 | .expand_done: |
||
2019 | pop eax ecx ecx edi edi |
||
2020 | jmp .doret |
||
2021 | .truncate: |
||
2022 | mov [edi+28], eax |
||
2023 | push ecx |
||
2024 | movzx ecx, word [edi+26] |
||
2025 | test eax, eax |
||
2026 | jz .zero_size |
||
2027 | ; find new last sector |
||
2028 | @@: |
||
2029 | sub eax, 0x200 |
||
2030 | jbe @f |
||
381 | serge | 2031 | movzx ecx, word [FLOPPY_FAT+ecx*2] |
133 | diamond | 2032 | jmp @b |
2033 | @@: |
||
2034 | ; we will zero data at the end of last sector - remember it |
||
2035 | push ecx |
||
2036 | ; terminate FAT chain |
||
381 | serge | 2037 | lea ecx, [FLOPPY_FAT+ecx+ecx] |
133 | diamond | 2038 | push dword [ecx] |
2039 | mov word [ecx], 0xFFF |
||
2040 | pop ecx |
||
2041 | and ecx, 0xFFF |
||
2042 | jmp .delete |
||
2043 | .zero_size: |
||
2044 | and word [edi+26], 0 |
||
2045 | push 0 |
||
2046 | .delete: |
||
2047 | ; delete FAT chain starting with ecx |
||
2048 | ; mark all clusters as free |
||
2049 | cmp ecx, 0xFF8 |
||
2050 | jae .deleted |
||
381 | serge | 2051 | lea ecx, [FLOPPY_FAT+ecx+ecx] |
133 | diamond | 2052 | push dword [ecx] |
2053 | and word [ecx], 0 |
||
2054 | pop ecx |
||
2055 | and ecx, 0xFFF |
||
2056 | jmp .delete |
||
2057 | .deleted: |
||
2058 | mov edi, [edi+28] |
||
2059 | ; save directory & FAT |
||
2060 | mov eax, [esp+8] |
||
2061 | pusha |
||
2062 | call save_chs_sector |
||
2063 | popa |
||
2064 | cmp [FDC_Status], 0 |
||
2065 | jnz .device_err2 |
||
2066 | call save_flp_fat |
||
2067 | cmp [FDC_Status], 0 |
||
2068 | jnz .device_err2 |
||
2069 | ; zero last sector, ignore errors |
||
2070 | pop eax |
||
2071 | add eax, 31 |
||
2072 | and edi, 0x1FF |
||
2073 | jz .truncate_done |
||
2074 | call SetUserInterrupts |
||
2075 | pusha |
||
2076 | call read_chs_sector |
||
2077 | popa |
||
380 | serge | 2078 | add edi, FDD_BUFF |
2079 | mov ecx, FDD_BUFF+0x200 |
||
133 | diamond | 2080 | sub ecx, edi |
2081 | push eax |
||
2082 | xor eax, eax |
||
2083 | rep stosb |
||
2084 | pop eax |
||
2085 | pusha |
||
2086 | call save_chs_sector |
||
2087 | popa |
||
2088 | .truncate_done: |
||
2089 | pop ecx eax edi |
||
2090 | xor eax, eax |
||
2091 | jmp .doret |
||
2092 | |||
86 | diamond | 2093 | fs_FloppyGetFileInfo: |
2094 | call read_flp_fat |
||
2095 | cmp [FDC_Status], 0 |
||
2096 | jnz ret11 |
||
2097 | cmp byte [esi], 0 |
||
2098 | jnz @f |
||
2099 | mov eax, 2 ; unsupported |
||
2100 | ret |
||
2101 | @@: |
||
2102 | push edi |
||
2103 | call fd_find_lfn |
||
2104 | jmp fs_GetFileInfo_finish |
||
2105 | |||
2106 | ret11: |
||
2107 | mov eax, 11 |
||
2108 | ret |
||
2109 | |||
2110 | fs_FloppySetFileInfo: |
||
2111 | call read_flp_fat |
||
2112 | cmp [FDC_Status], 0 |
||
2113 | jnz ret11 |
||
2114 | cmp byte [esi], 0 |
||
2115 | jnz @f |
||
2116 | mov eax, 2 ; unsupported |
||
2117 | ret |
||
2118 | @@: |
||
2119 | push edi |
||
2120 | call fd_find_lfn |
||
2121 | jnc @f |
||
2122 | pop edi |
||
2123 | mov eax, ERROR_FILE_NOT_FOUND |
||
2124 | ret |
||
2125 | @@: |
||
2126 | push eax |
||
2127 | call bdfe_to_fat_entry |
||
2128 | pop eax |
||
2129 | pusha |
||
2130 | call save_chs_sector |
||
2131 | popa |
||
2132 | pop edi |
||
2133 | xor eax, eax |
||
2134 | cmp [FDC_Status], 0 |
||
2135 | jz @f |
||
2136 | mov al, 11 |
||
2137 | @@: |
||
2138 | ret |
||
2139 | |||
91 | diamond | 2140 | ;---------------------------------------------------------------- |
2141 | ; |
||
171 | diamond | 2142 | ; fs_FloppyDelete - delete file or empty folder from floppy |
2143 | ; |
||
2144 | ; esi points to filename |
||
2145 | ; |
||
2146 | ; ret eax = 0 ok or other = errormsg |
||
2147 | ; |
||
2148 | ;-------------------------------------------------------------- |
||
2149 | fs_FloppyDelete: |
||
2150 | call read_flp_fat |
||
2151 | cmp [FDC_Status], 0 |
||
2152 | jz @f |
||
2153 | push 11 |
||
2154 | jmp .pop_ret |
||
2155 | @@: |
||
2156 | cmp byte [esi], 0 |
||
2157 | jnz @f |
||
2158 | ; cannot delete root! |
||
2159 | .access_denied: |
||
2160 | push ERROR_ACCESS_DENIED |
||
2161 | .pop_ret: |
||
2162 | pop eax |
||
2163 | ret |
||
2164 | @@: |
||
2165 | and [fd_prev_sector], 0 |
||
2166 | and [fd_prev_prev_sector], 0 |
||
2167 | push edi |
||
2168 | call fd_find_lfn |
||
2169 | jnc .found |
||
2170 | pop edi |
||
2171 | push ERROR_FILE_NOT_FOUND |
||
2172 | jmp .pop_ret |
||
2173 | .found: |
||
2174 | cmp dword [edi], '. ' |
||
2175 | jz .access_denied2 |
||
2176 | cmp dword [edi], '.. ' |
||
2177 | jz .access_denied2 |
||
2178 | test byte [edi+11], 10h |
||
2179 | jz .dodel |
||
2180 | ; we can delete only empty folders! |
||
2181 | push eax |
||
2182 | movzx eax, word [edi+26] |
||
2183 | push ebx |
||
2184 | pusha |
||
2185 | add eax, 31 |
||
2186 | call read_chs_sector |
||
2187 | popa |
||
380 | serge | 2188 | mov ebx, FDD_BUFF + 2*0x20 |
171 | diamond | 2189 | .checkempty: |
2190 | cmp byte [ebx], 0 |
||
2191 | jz .empty |
||
2192 | cmp byte [ebx], 0xE5 |
||
2193 | jnz .notempty |
||
2194 | add ebx, 0x20 |
||
380 | serge | 2195 | cmp ebx, FDD_BUFF + 0x200 |
171 | diamond | 2196 | jb .checkempty |
2197 | movzx eax, word [FLOPPY_FAT + eax*2] |
||
2198 | pusha |
||
2199 | add eax, 31 |
||
2200 | call read_chs_sector |
||
2201 | popa |
||
380 | serge | 2202 | mov ebx, FDD_BUFF |
171 | diamond | 2203 | jmp .checkempty |
2204 | .notempty: |
||
2205 | pop ebx |
||
2206 | pop eax |
||
2207 | .access_denied2: |
||
2208 | pop edi |
||
2209 | jmp .access_denied |
||
2210 | .empty: |
||
2211 | pop ebx |
||
2212 | pop eax |
||
2213 | pusha |
||
2214 | call read_chs_sector |
||
2215 | popa |
||
2216 | .dodel: |
||
2217 | push eax |
||
2218 | movzx eax, word [edi+26] |
||
2219 | xchg eax, [esp] |
||
2220 | ; delete folder entry |
||
2221 | mov byte [edi], 0xE5 |
||
2222 | ; delete LFN (if present) |
||
2223 | .lfndel: |
||
380 | serge | 2224 | cmp edi, FDD_BUFF |
171 | diamond | 2225 | ja @f |
2226 | cmp [fd_prev_sector], 0 |
||
2227 | jz .lfndone |
||
2228 | push [fd_prev_sector] |
||
2229 | push [fd_prev_prev_sector] |
||
2230 | pop [fd_prev_sector] |
||
2231 | and [fd_prev_prev_sector], 0 |
||
2232 | pusha |
||
2233 | call save_chs_sector |
||
2234 | popa |
||
2235 | pop eax |
||
2236 | pusha |
||
2237 | call read_chs_sector |
||
2238 | popa |
||
380 | serge | 2239 | mov edi, FDD_BUFF+0x200 |
171 | diamond | 2240 | @@: |
2241 | sub edi, 0x20 |
||
2242 | cmp byte [edi], 0xE5 |
||
2243 | jz .lfndone |
||
2244 | cmp byte [edi+11], 0xF |
||
2245 | jnz .lfndone |
||
2246 | mov byte [edi], 0xE5 |
||
2247 | jmp .lfndel |
||
2248 | .lfndone: |
||
2249 | pusha |
||
2250 | call save_chs_sector |
||
2251 | popa |
||
2252 | ; delete FAT chain |
||
2253 | pop eax |
||
2254 | test eax, eax |
||
2255 | jz .done |
||
2256 | @@: |
||
2257 | lea eax, [FLOPPY_FAT + eax*2] |
||
2258 | push dword [eax] |
||
2259 | and word [eax], 0 |
||
2260 | pop eax |
||
2261 | and eax, 0xFFF |
||
2262 | jnz @b |
||
2263 | .done: |
||
2264 | call save_flp_fat |
||
2265 | pop edi |
||
2266 | xor eax, eax |
||
2267 | ret |
||
2268 | |||
78 | diamond | 2269 | ; \end{diamond}=>=>->->-> |