3 * FAT12/16/32 Driver Version (Incl LFN)
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15 # define DEBUGS(v...) Log(v)
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17 # define DEBUGS(v...)
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26 #define CACHE_FAT 1 //!< Caches the FAT in memory
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27 #define USE_LFN 1 //!< Enables the use of Long File Names
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31 typedef struct s_lfncache {
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35 struct s_lfncache *Next;
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39 // === PROTOTYPES ===
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40 int FAT_Install(char **Arguments);
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41 tVFS_Node *FAT_InitDevice(char *device, char *options);
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42 void FAT_Unmount(tVFS_Node *Node);
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43 Uint64 FAT_Read(tVFS_Node *node, Uint64 offset, Uint64 length, void *buffer);
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44 Uint64 FAT_Write(tVFS_Node *node, Uint64 offset, Uint64 length, void *buffer);
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45 char *FAT_ReadDir(tVFS_Node *dirNode, int dirpos);
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46 tVFS_Node *FAT_FindDir(tVFS_Node *dirNode, char *file);
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47 int FAT_Mknod(tVFS_Node *Node, char *Name, Uint Flags);
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48 int FAT_Relink(tVFS_Node *node, char *OldName, char *NewName);
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49 void FAT_CloseFile(tVFS_Node *node);
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51 // === SEMI-GLOBALS ===
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52 MODULE_DEFINE(0, 0x5B /*v0.90*/, FAT32, FAT_Install, NULL);
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53 tFAT_VolInfo gFAT_Disks[8];
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54 int giFAT_PartCount = 0;
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56 Uint32 *fat_cache[8];
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59 t_lfncache *fat_lfncache;
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61 tVFS_Driver gFAT_FSInfo = {
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62 "fat", 0, FAT_InitDevice, FAT_Unmount, NULL
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67 * \fn int FAT_Install(char **Arguments)
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70 int FAT_Install(char **Arguments)
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72 VFS_AddDriver( &gFAT_FSInfo );
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77 * \fn tVFS_Node *FAT_InitDevice(char *Device, char *options)
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78 * \brief Reads the boot sector of a disk and prepares the structures for it
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80 tVFS_Node *FAT_InitDevice(char *Device, char *options)
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84 Uint32 FATSz, RootDirSectors, TotSec, CountofClusters;
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85 tVFS_Node *node = NULL;
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86 tFAT_VolInfo *diskInfo = &gFAT_Disks[giFAT_PartCount];
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89 bs = &diskInfo->bootsect;
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91 //Open device and read boot sector
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92 diskInfo->fileHandle = VFS_Open(Device, VFS_OPENFLAG_READ|VFS_OPENFLAG_WRITE);
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93 if(diskInfo->fileHandle == -1) {
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94 Warning("FAT_InitDisk - Unable to open device '%s'", Device);
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98 VFS_ReadAt(diskInfo->fileHandle, 0, 512, bs);
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100 if(bs->bps == 0 || bs->spc == 0) {
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101 Warning("FAT_InitDisk - Error in FAT Boot Sector\n");
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105 //FAT Type Determining
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106 // From Microsoft FAT Specifcation
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107 RootDirSectors = ((bs->files_in_root*32) + (bs->bps - 1)) / bs->bps;
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109 if(bs->fatSz16 != 0) FATSz = bs->fatSz16;
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110 else FATSz = bs->spec.fat32.fatSz32;
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112 if(bs->totalSect16 != 0) TotSec = bs->totalSect16;
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113 else TotSec = bs->totalSect32;
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115 CountofClusters = (TotSec - (bs->resvSectCount + (bs->fatCount * FATSz) + RootDirSectors)) / bs->spc;
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117 if(CountofClusters < 4085)
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118 diskInfo->type = FAT12;
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119 else if(CountofClusters < 65525)
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120 diskInfo->type = FAT16;
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122 diskInfo->type = FAT32;
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126 char *sFatType, *sSize;
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127 Uint iSize = CountofClusters * bs->spc / 2;
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129 switch(diskInfo->type)
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131 case FAT12: sFatType = "FAT12"; break;
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132 case FAT16: sFatType = "FAT16"; break;
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133 case FAT32: sFatType = "FAT32"; break;
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135 if(iSize <= 2*1024) {
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138 else if(iSize <= 2*1024*1024) {
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146 Log("[FAT ] '%s' %s, %i %s", Device, sFatType, iSize, sSize);
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151 if(diskInfo->type == FAT32) {
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153 diskInfo->name[i] = (bs->spec.fat32.label[i] == ' ' ? '\0' : bs->spec.fat32.label[i]);
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157 diskInfo->name[i] = (bs->spec.fat16.label[i] == ' ' ? '\0' : bs->spec.fat16.label[i]);
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159 diskInfo->name[11] = '\0';
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161 //Compute Root directory offset
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162 if(diskInfo->type == FAT32)
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163 diskInfo->rootOffset = bs->spec.fat32.rootClust;
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165 diskInfo->rootOffset = (FATSz * bs->fatCount) / bs->spc;
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167 diskInfo->clusterCount = CountofClusters;
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169 diskInfo->firstDataSect = bs->resvSectCount + (bs->fatCount * FATSz) + RootDirSectors;
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171 //Allow for Caching the FAT
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175 fat_cache[ giFAT_PartCount ] = (Uint32*)malloc(sizeof(Uint32)*CountofClusters);
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176 if(fat_cache[giFAT_PartCount] == NULL) {
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177 Warning("FAT_InitDisk - Heap Exhausted\n");
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180 Ofs = bs->resvSectCount*512;
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181 if(diskInfo->type == FAT12) {
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185 for(i=0;i<CountofClusters/2;i++) {
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186 j = i & 511; //%512
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188 VFS_ReadAt(diskInfo->fileHandle, Ofs, 3*512, buf);
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191 val = *((int*)(buf+j*3));
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192 fat_cache[giFAT_PartCount][i*2] = val & 0xFFF;
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193 fat_cache[giFAT_PartCount][i*2+1] = (val>>12) & 0xFFF;
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196 if(diskInfo->type == FAT16) {
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198 for(i=0;i<CountofClusters;i++) {
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199 if( (i & 255) == 0 ) {
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200 VFS_ReadAt(diskInfo->fileHandle, Ofs, 512, buf);
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203 fat_cache[giFAT_PartCount][i] = buf[i&255];
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206 if(diskInfo->type == FAT32) {
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208 for(i=0;i<CountofClusters;i++) {
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209 if( (i & 127) == 0 ) {
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210 VFS_ReadAt(diskInfo->fileHandle, Ofs, 512, buf);
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213 fat_cache[giFAT_PartCount][i] = buf[i&127];
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216 DEBUGS(" FAT_InitDisk: FAT Fully Cached\n");
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218 #endif /*CACHE_FAT*/
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220 //Initalise inode cache for FAT
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221 gFAT_Disks[giFAT_PartCount].inodeHandle = Inode_GetHandle();
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224 Log(" FAT_InitDisk: Inode Cache handle is %i\n", gFAT_Disks[giFAT_PartCount].inodeHandle);
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227 // == VFS Interface
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228 node = &gFAT_Disks[giFAT_PartCount].rootNode;
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229 node->Inode = diskInfo->rootOffset;
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230 node->Size = bs->files_in_root; // Unknown - To be set on readdir
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231 node->ImplInt = giFAT_PartCount;
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233 node->ReferenceCount = 1;
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235 node->UID = 0; node->GID = 0;
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237 node->ACLs = &gVFS_ACL_EveryoneRWX;
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238 node->Flags = VFS_FFLAG_DIRECTORY;
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239 node->CTime = node->MTime = node->ATime = now();
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241 node->Read = node->Write = NULL;
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242 node->ReadDir = FAT_ReadDir;
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243 node->FindDir = FAT_FindDir;
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244 node->Relink = FAT_Relink;
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245 node->MkNod = FAT_Mknod;
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246 //node->Close = FAT_CloseDevice;
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248 giFAT_PartCount ++;
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253 * \fn void FAT_Unmount(tVFS_Node *Node)
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254 * \brief Closes a mount and marks it as free
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256 void FAT_Unmount(tVFS_Node *Node)
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258 // Close Disk Handle
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259 VFS_Close( gFAT_Disks[Node->ImplInt].fileHandle );
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260 // Clear Node Cache
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261 Inode_ClearCache(gFAT_Disks[Node->ImplInt].inodeHandle);
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263 gFAT_Disks[Node->ImplInt].fileHandle = -2;
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268 * \fn static Uint32 FAT_int_GetFatValue(int handle, Uint32 cluster)
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269 * \brief Fetches a value from the FAT
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271 static Uint32 FAT_int_GetFatValue(int handle, Uint32 cluster)
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274 ENTER("iHandle xCluster", handle, cluster);
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276 val = fat_cache[handle][cluster];
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278 if(gFAT_Disks[handle].type == FAT12) {
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279 VFS_ReadAt(gFAT_Disks[handle].fileHandle, 512+(cluster&~1)*3, 3, &val);
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280 val = (cluster&1 ? val&0xFFF : val>>12);
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281 } else if(gFAT_Disks[handle].type == FAT16) {
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282 VFS_ReadAt(gFAT_Disks[handle].fileHandle, 512+cluster*2, 2, &val);
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284 VFS_ReadAt(gFAT_Disks[handle].fileHandle, 512+cluster*4, 4, &val);
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286 #endif /*CACHE_FAT*/
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291 /* Reads a cluster's data
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293 static void FAT_int_ReadCluster(int Handle, Uint32 Cluster, int Length, void *Buffer)
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296 ENTER("iHandle xCluster iLength pBuffer", Handle, Cluster, Length, Buffer);
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299 gFAT_Disks[Handle].fileHandle,
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300 (gFAT_Disks[Handle].firstDataSect + (Cluster-2)*gFAT_Disks[Handle].bootsect.spc )
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301 * gFAT_Disks[Handle].bootsect.bps,
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311 * \fn Uint64 FAT_Read(tVFS_Node *node, Uint64 offset, Uint64 length, void *buffer)
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312 * \brief Reads data from a specified file
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314 Uint64 FAT_Read(tVFS_Node *node, Uint64 offset, Uint64 length, void *buffer)
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316 int preSkip, count;
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317 int handle = node->ImplInt;
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318 int i, cluster, pos;
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322 tFAT_VolInfo *disk = &gFAT_Disks[node->ImplInt];
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324 ENTER("Xoffset Xlength pbuffer", offset, length, buffer);
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326 // Calculate and Allocate Bytes Per Cluster
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327 bpc = disk->bootsect.spc * disk->bootsect.bps;
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328 tmpBuf = (void*) malloc(bpc);
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329 LOG("malloc'd %i bytes", bpc);
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331 // Cluster is stored in Inode Field
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332 cluster = node->Inode;
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335 if (disk->type == FAT12) eocMarker = EOC_FAT12;
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336 else if(disk->type == FAT16) eocMarker = EOC_FAT16;
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337 else if(disk->type == FAT32) eocMarker = EOC_FAT32;
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339 Log("ERROR: Unsupported FAT Variant.\n");
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345 // Single Cluster including offset
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346 if(length + offset < bpc)
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348 FAT_int_ReadCluster(handle, cluster, bpc, tmpBuf);
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349 memcpy( buffer, (void*)( tmpBuf + offset%bpc ), length );
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355 preSkip = offset / bpc;
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357 //Skip previous clusters
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358 for(i=preSkip;i--;) {
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359 cluster = FAT_int_GetFatValue(handle, cluster);
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360 if(cluster == eocMarker) {
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361 Warning("FAT_Read - Offset is past end of cluster chain mark");
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365 // Get Count of Clusters to read
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366 count = ((offset%bpc+length) / bpc) + 1;
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368 // Get buffer Position after 1st cluster
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369 pos = bpc - offset%bpc;
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371 // Read 1st Cluster
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372 FAT_int_ReadCluster(handle, cluster, bpc, tmpBuf);
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375 (void*)( tmpBuf + (bpc-pos) ),
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376 (pos < length ? pos : length)
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385 cluster = FAT_int_GetFatValue(handle, cluster);
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388 LOG("pos=%i\n", pos);
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389 LOG("Reading the rest of the clusters\n");
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393 //Read the rest of the cluster data
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394 for( i = 1; i < count-1; i++ )
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396 FAT_int_ReadCluster(handle, cluster, bpc, tmpBuf);
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397 memcpy((void*)(buffer+pos), tmpBuf, bpc);
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399 cluster = FAT_int_GetFatValue(handle, cluster);
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400 if(cluster == eocMarker) {
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401 Warning("FAT_Read - Read past End of Cluster Chain");
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408 FAT_int_ReadCluster(handle, cluster, bpc, tmpBuf);
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409 memcpy((void*)(buffer+pos), tmpBuf, length-pos);
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412 LOG("Free tmpBuf(0x%x) and Return\n", tmpBuf);
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416 LEAVE('X', length);
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421 * \fn Uint64 FAT_Write(tVFS_Node *node, Uint64 offset, Uint64 length, void *buffer)
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423 Uint64 FAT_Write(tVFS_Node *node, Uint64 offset, Uint64 length, void *buffer)
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429 * \fn static void FAT_int_ProperFilename(char *dest, char *src)
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430 * \brief Converts a FAT directory entry name into a proper filename
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432 static void FAT_int_ProperFilename(char *dest, char *src)
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436 for( a = 0; a < 8; a++) {
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437 if(src[a] == ' ') break;
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444 for( ; a < 11; a++, b++) {
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445 if(src[a] == ' ') break;
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450 //Log("FAT_int_ProperFilename: dest='%s'", dest);
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455 * \fn char *FAT_int_CreateName(tVFS_Node *parent, fat_filetable *ft, char *LongFileName)
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456 * \brief Converts either a LFN or a 8.3 Name into a proper name
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458 char *FAT_int_CreateName(tVFS_Node *parent, fat_filetable *ft, char *LongFileName)
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463 if(LongFileName && LongFileName[0] != '\0')
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465 len = strlen(LongFileName);
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466 ret = malloc(len+1);
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467 strcpy(ret, LongFileName);
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472 ret = (char*) malloc(13);
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473 memset(ret, 13, '\0');
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474 FAT_int_ProperFilename(ret, ft->name);
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482 * \fn tVFS_Node *FAT_int_CreateNode(tVFS_Node *parent, fat_filetable *ft, char *LongFileName)
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483 * \brief Creates a tVFS_Node structure for a given file entry
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485 tVFS_Node *FAT_int_CreateNode(tVFS_Node *parent, fat_filetable *ft, char *LongFileName)
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487 tVFS_Node node = {0};
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490 ENTER("pParent pFT sLongFileName", parent, ft, LongFileName);
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493 node.Inode = ft->cluster | (ft->clusterHi<<16);
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494 node.Size = ft->size;
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495 node.ImplInt = parent->ImplInt;
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496 node.UID = 0; node.GID = 0;
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498 node.ACLs = &gVFS_ACL_EveryoneRWX; // RWXRWXRWX
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501 if(ft->attrib & ATTR_DIRECTORY) node.Flags |= VFS_FFLAG_DIRECTORY;
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502 if(ft->attrib & ATTR_READONLY) node.Flags |= VFS_FFLAG_READONLY;
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504 node.ATime = timestamp(0,0,0,
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505 ((ft->adate&0x1F)-1), //Days
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506 ((ft->adate&0x1E0)-1), //Months
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507 1980+((ft->adate&0xFF00)>>8)); //Years
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509 node.CTime = ft->ctimems * 10; //Miliseconds
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510 node.CTime += timestamp(
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511 (ft->ctime&0x1F)<<1, //Seconds
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512 ((ft->ctime&0x3F0)>>5), //Minutes
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513 ((ft->ctime&0xF800)>>11), //Hours
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514 ((ft->cdate&0x1F)-1), //Days
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515 ((ft->cdate&0x1E0)-1), //Months
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516 1980+((ft->cdate&0xFF00)>>8)); //Years
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518 node.MTime = timestamp(
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519 (ft->mtime&0x1F)<<1, //Seconds
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520 ((ft->mtime&0x3F0)>>5), //Minuites
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521 ((ft->mtime&0xF800)>>11), //Hours
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522 ((ft->mdate&0x1F)-1), //Days
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523 ((ft->mdate&0x1E0)-1), //Months
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524 1980+((ft->mdate&0xFF00)>>8)); //Years
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526 if(node.Flags & VFS_FFLAG_DIRECTORY) {
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527 node.ReadDir = FAT_ReadDir;
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528 node.FindDir = FAT_FindDir;
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529 node.MkNod = FAT_Mknod;
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532 node.Read = FAT_Read;
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533 node.Write = FAT_Write;
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535 node.Close = FAT_CloseFile;
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536 node.Relink = FAT_Relink;
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538 ret = Inode_CacheNode(gFAT_Disks[parent->ImplInt].inodeHandle, &node);
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545 \fn char *FAT_int_GetLFN(tVFS_Node *node)
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546 \brief Return pointer to LFN cache entry
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548 char *FAT_int_GetLFN(tVFS_Node *node)
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551 tmp = fat_lfncache;
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554 if(tmp->Inode == node->Inode && tmp->Impl == node->ImplInt)
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558 tmp = malloc(sizeof(t_lfncache));
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559 tmp->Inode = node->Inode;
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560 tmp->Impl = node->ImplInt;
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561 memset(tmp->Name, 0, 256);
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563 tmp->Next = fat_lfncache;
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564 fat_lfncache = tmp;
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570 \fn void FAT_int_DelLFN(tVFS_Node *node)
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571 \brief Delete a LFN cache entry
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573 void FAT_int_DelLFN(tVFS_Node *node)
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577 if(!fat_lfncache) return;
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579 if(!fat_lfncache->Next)
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581 tmp = fat_lfncache;
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582 fat_lfncache = tmp->Next;
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586 tmp = fat_lfncache;
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587 while(tmp && tmp->Next)
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589 if(tmp->Inode == node->Inode && tmp->Impl == node->ImplInt)
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592 tmp->Next = tmp->Next->Next;
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601 \fn char *FAT_ReadDir(tVFS_Node *dirNode, int dirPos)
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602 \param dirNode Node structure of directory
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603 \param dirPos Directory position
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605 char *FAT_ReadDir(tVFS_Node *dirNode, int dirpos)
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607 fat_filetable fileinfo[16]; //Sizeof=32, 16 per sector
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609 tFAT_VolInfo *disk = &gFAT_Disks[dirNode->ImplInt&7];
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610 Uint32 cluster, offset;
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617 ENTER("pDirNode iDirPos", dirNode, dirpos);
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619 // Get Byte Offset and skip
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620 offset = dirpos * sizeof(fat_filetable);
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621 preSkip = (offset >> 9) / disk->bootsect.spc; // >>9 == /512
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622 cluster = dirNode->Inode; // Cluster ID
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625 // - Pre FAT32 had a reserved area for the root.
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626 if( !(disk->type != FAT32 && cluster == disk->rootOffset) )
\r
628 //Skip previous clusters
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629 for(a=preSkip;a--;) {
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630 cluster = FAT_int_GetFatValue(dirNode->ImplInt, cluster);
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634 // Check for end of cluster chain
\r
635 if((disk->type == FAT12 && cluster == EOC_FAT12)
\r
636 || (disk->type == FAT16 && cluster == EOC_FAT16)
\r
637 || (disk->type == FAT32 && cluster == EOC_FAT32))
\r
640 // Bounds Checking (Used to spot heap overflows)
\r
641 if(cluster > disk->clusterCount + 2)
\r
643 Warning("FAT_ReadDir - Cluster ID is over cluster count (0x%x>0x%x)",
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644 cluster, disk->clusterCount+2);
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649 LOG("cluster=0x%x, dirpos=%i\n", cluster, dirpos);
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652 // - Pre FAT32 cluster base (in sectors)
\r
653 if( cluster == disk->rootOffset && disk->type != FAT32 )
\r
654 offset = disk->bootsect.resvSectCount + cluster*disk->bootsect.spc;
\r
656 { // FAT32 cluster base (in sectors)
\r
657 offset = disk->firstDataSect;
\r
658 offset += (cluster - 2) * disk->bootsect.spc;
\r
660 // Sector in cluster
\r
661 if(disk->bootsect.spc == 1)
\r
662 offset += (dirpos / 16);
\r
664 offset += (dirpos / 16) % disk->bootsect.spc;
\r
665 // Offset in sector
\r
668 LOG("offset=%i, a=%i", (Uint)offset, a);
\r
671 VFS_ReadAt(disk->fileHandle, offset*512, 512, fileinfo); // Read Dir Data
\r
673 LOG("name[0] = 0x%x", (Uint8)fileinfo[a].name[0]);
\r
674 //Check if this is the last entry
\r
675 if(fileinfo[a].name[0] == '\0') {
\r
676 dirNode->Size = dirpos;
\r
677 LOG("End of list");
\r
679 return NULL; // break
\r
682 // Check for empty entry
\r
683 if((Uint8)fileinfo[a].name[0] == 0xE5) {
\r
684 LOG("Empty Entry\n");
\r
685 LEAVE('p', VFS_SKIP);
\r
686 return VFS_SKIP; // Skip
\r
690 // Get Long File Name Cache
\r
691 lfn = FAT_int_GetLFN(dirNode);
\r
692 if(fileinfo[a].attrib == ATTR_LFN)
\r
694 fat_longfilename *lfnInfo;
\r
697 lfnInfo = (fat_longfilename *) &fileinfo[a];
\r
698 if(lfnInfo->id & 0x40) memset(lfn, 0, 256);
\r
699 // Get the current length
\r
702 // Sanity Check (FAT implementations should not allow >255 bytes)
\r
703 if(len + 13 > 255) return VFS_SKIP;
\r
704 // Rebase all bytes
\r
705 for(a=len+1;a--;) lfn[a+13] = lfn[a];
\r
707 // Append new bytes
\r
708 lfn[ 0] = lfnInfo->name1[0]; lfn[ 1] = lfnInfo->name1[1];
\r
709 lfn[ 2] = lfnInfo->name1[2]; lfn[ 3] = lfnInfo->name1[3];
\r
710 lfn[ 4] = lfnInfo->name1[4];
\r
711 lfn[ 5] = lfnInfo->name2[0]; lfn[ 6] = lfnInfo->name2[1];
\r
712 lfn[ 7] = lfnInfo->name2[2]; lfn[ 8] = lfnInfo->name2[3];
\r
713 lfn[ 9] = lfnInfo->name2[4]; lfn[10] = lfnInfo->name2[5];
\r
714 lfn[11] = lfnInfo->name3[0]; lfn[12] = lfnInfo->name3[1];
\r
715 LEAVE('p', VFS_SKIP);
\r
720 //Check if it is a volume entry
\r
721 if(fileinfo[a].attrib & 0x08) {
\r
722 LEAVE('p', VFS_SKIP);
\r
726 if(fileinfo[a].name[0] == '.') {
\r
727 LEAVE('p', VFS_SKIP);
\r
731 LOG("name='%c%c%c%c%c%c%c%c.%c%c%c'\n",
\r
732 fileinfo[a].name[0], fileinfo[a].name[1], fileinfo[a].name[2], fileinfo[a].name[3],
\r
733 fileinfo[a].name[4], fileinfo[a].name[5], fileinfo[a].name[6], fileinfo[a].name[7],
\r
734 fileinfo[a].name[8], fileinfo[a].name[9], fileinfo[a].name[10] );
\r
737 //node = FAT_int_CreateNode(dirNode, &fileinfo[a], lfn);
\r
738 ret = FAT_int_CreateName(dirNode, &fileinfo[a], lfn);
\r
741 //node = FAT_int_CreateNode(dirNode, &fileinfo[a], NULL);
\r
742 ret = FAT_int_CreateName(dirNode, &fileinfo[a], NULL);
\r
750 * \fn tVFS_Node *FAT_FindDir(tVFS_Node *node, char *name)
\r
751 * \brief Finds an entry in the current directory
\r
753 tVFS_Node *FAT_FindDir(tVFS_Node *node, char *name)
\r
755 fat_filetable fileinfo[16];
\r
758 fat_longfilename *lfnInfo;
\r
760 int lfnPos=255, lfnId = -1;
\r
763 tVFS_Node *tmpNode;
\r
765 tFAT_VolInfo *disk = &gFAT_Disks[node->ImplInt];
\r
769 ENTER("pnode sname", node, name);
\r
772 if(!name) return NULL;
\r
773 if(name[0] == '\0') return NULL;
\r
776 lfn = FAT_int_GetLFN(node);
\r
779 dirCluster = node->Inode;
\r
780 // Seek to Directory
\r
781 if( dirCluster == disk->rootOffset && disk->type != FAT32 )
\r
782 diskOffset = (disk->bootsect.resvSectCount+dirCluster*disk->bootsect.spc) << 9;
\r
784 diskOffset = (disk->firstDataSect+(dirCluster-2)*disk->bootsect.spc) << 9;
\r
789 if((i & 0xF) == 0) {
\r
790 VFS_ReadAt(disk->fileHandle, diskOffset, 512, fileinfo);
\r
794 //Check if the files are free
\r
795 if(fileinfo[i&0xF].name[0] == '\0') break; //Free and last
\r
796 if(fileinfo[i&0xF].name[0] == '\xE5') goto loadCluster; //Free
\r
800 // Long File Name Entry
\r
801 if(fileinfo[i&0xF].attrib == ATTR_LFN)
\r
803 lfnInfo = (fat_longfilename *) &fileinfo[i&0xF];
\r
804 if(lfnInfo->id & 0x40) {
\r
805 memset(lfn, 0, 256);
\r
808 lfn[lfnPos--] = lfnInfo->name3[1]; lfn[lfnPos--] = lfnInfo->name3[0];
\r
809 lfn[lfnPos--] = lfnInfo->name2[5]; lfn[lfnPos--] = lfnInfo->name2[4];
\r
810 lfn[lfnPos--] = lfnInfo->name2[3]; lfn[lfnPos--] = lfnInfo->name2[2];
\r
811 lfn[lfnPos--] = lfnInfo->name2[1]; lfn[lfnPos--] = lfnInfo->name2[0];
\r
812 lfn[lfnPos--] = lfnInfo->name1[4]; lfn[lfnPos--] = lfnInfo->name1[3];
\r
813 lfn[lfnPos--] = lfnInfo->name1[2]; lfn[lfnPos--] = lfnInfo->name1[1];
\r
814 lfn[lfnPos--] = lfnInfo->name1[0];
\r
815 if((lfnInfo->id&0x3F) == 1)
\r
817 memcpy(lfn, lfn+lfnPos+1, 256-lfnPos);
\r
823 // Remove LFN if it does not apply
\r
824 if(lfnId != i) lfn[0] = '\0';
\r
826 // Get Real Filename
\r
827 FAT_int_ProperFilename(tmpName, fileinfo[i&0xF].name);
\r
829 LOG("tmpName = '%s'\n", tmpName);
\r
831 //Only Long name is case sensitive, 8.3 is not
\r
833 if(strucmp(tmpName, name) == 0 || strcmp(lfn, name) == 0) {
\r
835 if(strucmp(tmpName, name) == 0) {
\r
837 cluster = fileinfo[i&0xF].cluster | (fileinfo[i&0xF].clusterHi << 16);
\r
838 tmpNode = Inode_GetCache(disk->inodeHandle, cluster);
\r
839 if(tmpNode == NULL) // Node is not cached
\r
842 tmpNode = FAT_int_CreateNode(node, &fileinfo[i&0xF], lfn);
\r
844 tmpNode = FAT_int_CreateNode(node, &fileinfo[i&0xF], NULL);
\r
850 LEAVE('p', tmpNode);
\r
858 //Load Next cluster?
\r
859 if( ((i+1) >> 4) % disk->bootsect.spc == 0 && ((i+1) & 0xF) == 0)
\r
861 if( dirCluster == disk->rootOffset && disk->type != FAT32 )
\r
863 dirCluster = FAT_int_GetFatValue(node->ImplInt, dirCluster);
\r
864 diskOffset = (disk->firstDataSect+(dirCluster-2)*disk->bootsect.spc)*512;
\r
873 * \fn int FAT_Mknod(tVFS_Node *Node, char *Name, Uint Flags)
\r
874 * \brief Create a new node
\r
876 int FAT_Mknod(tVFS_Node *Node, char *Name, Uint Flags)
\r
882 * \fn int FAT_Relink(tVFS_Node *Node, char *OldName, char *NewName)
\r
883 * \brief Rename / Delete a file
\r
885 int FAT_Relink(tVFS_Node *Node, char *OldName, char *NewName)
\r
891 * \fn void FAT_CloseFile(tVFS_Node *Node)
\r
892 * \brief Close an open file
\r
894 void FAT_CloseFile(tVFS_Node *Node)
\r
896 if(Node == NULL) return ;
\r
898 Inode_UncacheNode(gFAT_Disks[Node->ImplInt].inodeHandle, Node->Inode);
\r
900 if( !Inode_GetCache(gFAT_Disks[Node->ImplInt].inodeHandle, Node->Inode)
\r
901 && Node->Flags & VFS_FFLAG_DIRECTORY)
\r
902 FAT_int_DelLFN(Node);
\r
903 else // Get Cache references the node, so dereference it
\r
904 Inode_UncacheNode(gFAT_Disks[Node->ImplInt].inodeHandle, Node->Inode);
\r
910 * \fn void fat_install()
\r
911 * \brief Add the FAT Filesystem to the VFS
\r
915 VFS_AddDriver( &gFAT_FSInfo );
\r