3 * FAT12/16/32 Driver Version (Incl LFN)
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8 #define CACHE_FAT 1 //!< Caches the FAT in memory
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9 #define USE_LFN 1 //!< Enables the use of Long File Names
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12 #include <modules.h>
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19 typedef struct s_lfncache {
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23 struct s_lfncache *Next;
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27 // === PROTOTYPES ===
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28 int FAT_Install(char **Arguments);
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29 tVFS_Node *FAT_InitDevice(char *device, char **options);
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30 void FAT_Unmount(tVFS_Node *Node);
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31 Uint64 FAT_Read(tVFS_Node *node, Uint64 offset, Uint64 length, void *buffer);
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32 Uint64 FAT_Write(tVFS_Node *node, Uint64 offset, Uint64 length, void *buffer);
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33 char *FAT_ReadDir(tVFS_Node *dirNode, int dirpos);
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34 tVFS_Node *FAT_FindDir(tVFS_Node *dirNode, char *file);
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35 int FAT_Mknod(tVFS_Node *Node, char *Name, Uint Flags);
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36 int FAT_Relink(tVFS_Node *node, char *OldName, char *NewName);
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37 void FAT_CloseFile(tVFS_Node *node);
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39 // === SEMI-GLOBALS ===
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40 MODULE_DEFINE(0, 0x51 /*v0.80*/, VFAT, FAT_Install, NULL, NULL);
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41 tFAT_VolInfo gFAT_Disks[8];
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42 int giFAT_PartCount = 0;
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44 t_lfncache *fat_lfncache;
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46 tVFS_Driver gFAT_FSInfo = {
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47 "fat", 0, FAT_InitDevice, FAT_Unmount, NULL
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52 * \fn int FAT_Install(char **Arguments)
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55 int FAT_Install(char **Arguments)
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57 VFS_AddDriver( &gFAT_FSInfo );
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58 return MODULE_INIT_SUCCESS;
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62 * \fn tVFS_Node *FAT_InitDevice(char *Device, char **options)
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63 * \brief Reads the boot sector of a disk and prepares the structures for it
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65 tVFS_Node *FAT_InitDevice(char *Device, char **options)
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69 Uint32 FATSz, RootDirSectors, TotSec, CountofClusters;
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70 tVFS_Node *node = NULL;
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71 tFAT_VolInfo *diskInfo = &gFAT_Disks[giFAT_PartCount];
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74 bs = &diskInfo->bootsect;
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76 //Open device and read boot sector
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77 diskInfo->fileHandle = VFS_Open(Device, VFS_OPENFLAG_READ|VFS_OPENFLAG_WRITE);
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78 if(diskInfo->fileHandle == -1) {
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79 Warning("FAT_InitDisk - Unable to open device '%s'", Device);
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83 VFS_ReadAt(diskInfo->fileHandle, 0, 512, bs);
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85 if(bs->bps == 0 || bs->spc == 0) {
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86 Warning("FAT_InitDisk - Error in FAT Boot Sector\n");
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90 //FAT Type Determining
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91 // From Microsoft FAT Specifcation
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92 RootDirSectors = ((bs->files_in_root*32) + (bs->bps - 1)) / bs->bps;
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94 if(bs->fatSz16 != 0) FATSz = bs->fatSz16;
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95 else FATSz = bs->spec.fat32.fatSz32;
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97 if(bs->totalSect16 != 0) TotSec = bs->totalSect16;
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98 else TotSec = bs->totalSect32;
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100 CountofClusters = (TotSec - (bs->resvSectCount + (bs->fatCount * FATSz) + RootDirSectors)) / bs->spc;
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102 if(CountofClusters < 4085)
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103 diskInfo->type = FAT12;
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104 else if(CountofClusters < 65525)
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105 diskInfo->type = FAT16;
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107 diskInfo->type = FAT32;
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111 char *sFatType, *sSize;
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112 Uint iSize = CountofClusters * bs->spc / 2;
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114 switch(diskInfo->type)
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116 case FAT12: sFatType = "FAT12"; break;
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117 case FAT16: sFatType = "FAT16"; break;
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118 case FAT32: sFatType = "FAT32"; break;
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120 if(iSize <= 2*1024) {
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123 else if(iSize <= 2*1024*1024) {
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131 Log("[FAT ] '%s' %s, %i %s", Device, sFatType, iSize, sSize);
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136 if(diskInfo->type == FAT32) {
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138 diskInfo->name[i] = (bs->spec.fat32.label[i] == ' ' ? '\0' : bs->spec.fat32.label[i]);
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142 diskInfo->name[i] = (bs->spec.fat16.label[i] == ' ' ? '\0' : bs->spec.fat16.label[i]);
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144 diskInfo->name[11] = '\0';
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146 //Compute Root directory offset
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147 if(diskInfo->type == FAT32)
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148 diskInfo->rootOffset = bs->spec.fat32.rootClust;
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150 diskInfo->rootOffset = (FATSz * bs->fatCount) / bs->spc;
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152 diskInfo->clusterCount = CountofClusters;
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154 diskInfo->firstDataSect = bs->resvSectCount + (bs->fatCount * FATSz) + RootDirSectors;
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156 //Allow for Caching the FAT
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160 diskInfo->FATCache = (Uint32*)malloc(sizeof(Uint32)*CountofClusters);
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161 if(diskInfo->FATCache == NULL) {
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162 Warning("FAT_InitDisk - Heap Exhausted\n");
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165 Ofs = bs->resvSectCount*512;
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166 if(diskInfo->type == FAT12) {
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170 for(i=0;i<CountofClusters/2;i++) {
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171 j = i & 511; //%512
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173 VFS_ReadAt(diskInfo->fileHandle, Ofs, 3*512, buf);
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176 val = *((int*)(buf+j*3));
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177 diskInfo->FATCache[i*2] = val & 0xFFF;
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178 diskInfo->FATCache[i*2+1] = (val>>12) & 0xFFF;
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181 if(diskInfo->type == FAT16) {
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183 for(i=0;i<CountofClusters;i++) {
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184 if( (i & 255) == 0 ) {
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185 VFS_ReadAt(diskInfo->fileHandle, Ofs, 512, buf);
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188 diskInfo->FATCache[i] = buf[i&255];
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191 if(diskInfo->type == FAT32) {
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193 for(i=0;i<CountofClusters;i++) {
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194 if( (i & 127) == 0 ) {
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195 VFS_ReadAt(diskInfo->fileHandle, Ofs, 512, buf);
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198 diskInfo->FATCache[i] = buf[i&127];
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201 LOG("FAT Fully Cached");
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203 #endif /*CACHE_FAT*/
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205 //Initalise inode cache for FAT
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206 diskInfo->inodeHandle = Inode_GetHandle();
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207 LOG("Inode Cache handle is %i", diskInfo->inodeHandle);
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209 // == VFS Interface
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210 node = &diskInfo->rootNode;
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211 node->Inode = diskInfo->rootOffset;
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212 node->Size = bs->files_in_root; // Unknown - To be set on readdir
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213 node->ImplInt = giFAT_PartCount;
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215 node->ReferenceCount = 1;
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217 node->UID = 0; node->GID = 0;
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219 node->ACLs = &gVFS_ACL_EveryoneRWX;
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220 node->Flags = VFS_FFLAG_DIRECTORY;
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221 node->CTime = node->MTime = node->ATime = now();
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223 node->Read = node->Write = NULL;
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224 node->ReadDir = FAT_ReadDir;
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225 node->FindDir = FAT_FindDir;
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226 node->Relink = FAT_Relink;
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227 node->MkNod = FAT_Mknod;
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228 //node->Close = FAT_CloseDevice;
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230 giFAT_PartCount ++;
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235 * \fn void FAT_Unmount(tVFS_Node *Node)
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236 * \brief Closes a mount and marks it as free
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238 void FAT_Unmount(tVFS_Node *Node)
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240 // Close Disk Handle
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241 VFS_Close( gFAT_Disks[Node->ImplInt].fileHandle );
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242 // Clear Node Cache
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243 Inode_ClearCache(gFAT_Disks[Node->ImplInt].inodeHandle);
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245 gFAT_Disks[Node->ImplInt].fileHandle = -2;
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250 * \fn static Uint32 FAT_int_GetFatValue(tFAT_VolInfo *Disk, Uint32 cluster)
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251 * \brief Fetches a value from the FAT
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253 static Uint32 FAT_int_GetFatValue(tFAT_VolInfo *Disk, Uint32 cluster)
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257 Uint32 ofs = Disk->bootsect.resvSectCount*512;
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259 ENTER("pDisk xCluster", Disk, cluster);
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261 val = Disk->FATCache[cluster];
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262 if(Disk->type == FAT12 && val == EOC_FAT12) val = -1;
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263 if(Disk->type == FAT16 && val == EOC_FAT16) val = -1;
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264 if(Disk->type == FAT32 && val == EOC_FAT32) val = -1;
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266 if(Disk->type == FAT12) {
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267 VFS_ReadAt(Disk->fileHandle, ofs+(cluster>>1)*3, 3, &val);
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268 val = (cluster&1 ? val&0xFFF : val>>12);
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269 if(val == EOC_FAT12) val = -1;
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270 } else if(Disk->type == FAT16) {
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271 VFS_ReadAt(Disk->fileHandle, ofs+cluster*2, 2, &val);
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272 if(val == EOC_FAT16) val = -1;
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274 VFS_ReadAt(Disk->fileHandle, ofs+cluster*4, 4, &val);
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275 if(val == EOC_FAT32) val = -1;
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277 #endif /*CACHE_FAT*/
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282 /* Reads a cluster's data
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284 static void FAT_int_ReadCluster(int Handle, Uint32 Cluster, int Length, void *Buffer)
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286 ENTER("iHandle xCluster iLength pBuffer", Handle, Cluster, Length, Buffer);
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287 //Log("Cluster = %i (0x%x)", Cluster, Cluster);
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289 gFAT_Disks[Handle].fileHandle,
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290 (gFAT_Disks[Handle].firstDataSect + (Cluster-2)*gFAT_Disks[Handle].bootsect.spc )
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291 * gFAT_Disks[Handle].bootsect.bps,
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299 * \fn Uint64 FAT_Read(tVFS_Node *node, Uint64 offset, Uint64 length, void *buffer)
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300 * \brief Reads data from a specified file
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302 Uint64 FAT_Read(tVFS_Node *node, Uint64 offset, Uint64 length, void *buffer)
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304 int preSkip, count;
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305 int handle = node->ImplInt;
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306 int i, cluster, pos;
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309 tFAT_VolInfo *disk = &gFAT_Disks[node->ImplInt];
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311 ENTER("Xoffset Xlength pbuffer", offset, length, buffer);
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313 // Calculate and Allocate Bytes Per Cluster
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314 bpc = disk->bootsect.spc * disk->bootsect.bps;
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315 tmpBuf = (void*) malloc(bpc);
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316 LOG("malloc'd %i bytes", bpc);
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318 // Cluster is stored in Inode Field
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319 cluster = node->Inode;
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321 // Sanity Check offset
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322 if(offset > node->Size) {
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323 //LOG("Reading past EOF (%i > %i)", offset, node->Size);
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328 if(offset + length > node->Size) {
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329 //LOG("Reading past EOF (%lli + %lli > %lli), clamped to %lli",
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330 // offset, length, node->Size, node->Size - offset);
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331 length = node->Size - offset;
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334 // Single Cluster including offset
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335 if(length + offset < bpc)
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337 FAT_int_ReadCluster(handle, cluster, bpc, tmpBuf);
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338 memcpy( buffer, (void*)( tmpBuf + offset%bpc ), length );
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344 preSkip = offset / bpc;
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346 //Skip previous clusters
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347 for(i=preSkip;i--;) {
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348 cluster = FAT_int_GetFatValue(disk, cluster);
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349 if(cluster == -1) {
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350 Warning("FAT_Read - Offset is past end of cluster chain mark");
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356 // Get Count of Clusters to read
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357 count = ((offset%bpc+length) / bpc) + 1;
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359 // Get buffer Position after 1st cluster
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360 pos = bpc - offset%bpc;
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362 // Read 1st Cluster
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363 FAT_int_ReadCluster(handle, cluster, bpc, tmpBuf);
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366 (void*)( tmpBuf + (bpc-pos) ),
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367 (pos < length ? pos : length)
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376 cluster = FAT_int_GetFatValue(disk, cluster);
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379 LOG("pos=%i\n", pos);
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380 LOG("Reading the rest of the clusters\n");
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384 //Read the rest of the cluster data
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385 for( i = 1; i < count-1; i++ )
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387 FAT_int_ReadCluster(handle, cluster, bpc, tmpBuf);
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388 memcpy((void*)(buffer+pos), tmpBuf, bpc);
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390 cluster = FAT_int_GetFatValue(disk, cluster);
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391 if(cluster == -1) {
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392 Warning("FAT_Read - Read past End of Cluster Chain");
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399 FAT_int_ReadCluster(handle, cluster, bpc, tmpBuf);
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400 memcpy((void*)(buffer+pos), tmpBuf, length-pos);
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403 LOG("Free tmpBuf(0x%x) and Return\n", tmpBuf);
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407 LEAVE('X', length);
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412 * \fn Uint64 FAT_Write(tVFS_Node *node, Uint64 offset, Uint64 length, void *buffer)
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414 Uint64 FAT_Write(tVFS_Node *node, Uint64 offset, Uint64 length, void *buffer)
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420 * \fn static void FAT_int_ProperFilename(char *dest, char *src)
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421 * \brief Converts a FAT directory entry name into a proper filename
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423 static void FAT_int_ProperFilename(char *dest, char *src)
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427 for( a = 0; a < 8; a++) {
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428 if(src[a] == ' ') break;
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435 for( ; a < 11; a++, b++) {
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436 if(src[a] == ' ') break;
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441 //Log("FAT_int_ProperFilename: dest='%s'", dest);
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446 * \fn char *FAT_int_CreateName(tVFS_Node *parent, fat_filetable *ft, char *LongFileName)
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447 * \brief Converts either a LFN or a 8.3 Name into a proper name
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449 char *FAT_int_CreateName(tVFS_Node *parent, fat_filetable *ft, char *LongFileName)
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454 if(LongFileName && LongFileName[0] != '\0')
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456 len = strlen(LongFileName);
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457 ret = malloc(len+1);
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458 strcpy(ret, LongFileName);
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463 ret = (char*) malloc(13);
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464 memset(ret, 13, '\0');
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465 FAT_int_ProperFilename(ret, ft->name);
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473 * \fn tVFS_Node *FAT_int_CreateNode(tVFS_Node *parent, fat_filetable *ft, char *LongFileName)
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474 * \brief Creates a tVFS_Node structure for a given file entry
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476 tVFS_Node *FAT_int_CreateNode(tVFS_Node *parent, fat_filetable *ft, char *LongFileName)
\r
478 tVFS_Node node = {0};
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481 ENTER("pParent pFT sLongFileName", parent, ft, LongFileName);
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484 node.Inode = ft->cluster | (ft->clusterHi<<16);
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485 node.Size = ft->size;
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486 LOG("ft->size = %i", ft->size);
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487 node.ImplInt = parent->ImplInt;
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488 node.UID = 0; node.GID = 0;
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490 node.ACLs = &gVFS_ACL_EveryoneRWX; // RWXRWXRWX
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493 if(ft->attrib & ATTR_DIRECTORY) node.Flags |= VFS_FFLAG_DIRECTORY;
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494 if(ft->attrib & ATTR_READONLY) node.Flags |= VFS_FFLAG_READONLY;
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496 node.ATime = timestamp(0,0,0,
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497 ((ft->adate&0x1F)-1), //Days
\r
498 ((ft->adate&0x1E0)-1), //Months
\r
499 1980+((ft->adate&0xFF00)>>8)); //Years
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501 node.CTime = ft->ctimems * 10; //Miliseconds
\r
502 node.CTime += timestamp(
\r
503 (ft->ctime&0x1F)<<1, //Seconds
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504 ((ft->ctime&0x3F0)>>5), //Minutes
\r
505 ((ft->ctime&0xF800)>>11), //Hours
\r
506 ((ft->cdate&0x1F)-1), //Days
\r
507 ((ft->cdate&0x1E0)-1), //Months
\r
508 1980+((ft->cdate&0xFF00)>>8)); //Years
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510 node.MTime = timestamp(
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511 (ft->mtime&0x1F)<<1, //Seconds
\r
512 ((ft->mtime&0x3F0)>>5), //Minuites
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513 ((ft->mtime&0xF800)>>11), //Hours
\r
514 ((ft->mdate&0x1F)-1), //Days
\r
515 ((ft->mdate&0x1E0)-1), //Months
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516 1980+((ft->mdate&0xFF00)>>8)); //Years
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518 if(node.Flags & VFS_FFLAG_DIRECTORY) {
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519 node.ReadDir = FAT_ReadDir;
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520 node.FindDir = FAT_FindDir;
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521 node.MkNod = FAT_Mknod;
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524 node.Read = FAT_Read;
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525 node.Write = FAT_Write;
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527 node.Close = FAT_CloseFile;
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528 node.Relink = FAT_Relink;
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530 ret = Inode_CacheNode(gFAT_Disks[parent->ImplInt].inodeHandle, &node);
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537 \fn char *FAT_int_GetLFN(tVFS_Node *node)
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538 \brief Return pointer to LFN cache entry
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540 char *FAT_int_GetLFN(tVFS_Node *node)
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543 tmp = fat_lfncache;
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546 if(tmp->Inode == node->Inode && tmp->Impl == node->ImplInt)
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550 tmp = malloc(sizeof(t_lfncache));
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551 tmp->Inode = node->Inode;
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552 tmp->Impl = node->ImplInt;
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553 memset(tmp->Name, 0, 256);
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555 tmp->Next = fat_lfncache;
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556 fat_lfncache = tmp;
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562 \fn void FAT_int_DelLFN(tVFS_Node *node)
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563 \brief Delete a LFN cache entry
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565 void FAT_int_DelLFN(tVFS_Node *node)
\r
569 if(!fat_lfncache) return;
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571 if(!fat_lfncache->Next)
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573 tmp = fat_lfncache;
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574 fat_lfncache = tmp->Next;
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578 tmp = fat_lfncache;
\r
579 while(tmp && tmp->Next)
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581 if(tmp->Inode == node->Inode && tmp->Impl == node->ImplInt)
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584 tmp->Next = tmp->Next->Next;
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593 \fn char *FAT_ReadDir(tVFS_Node *dirNode, int dirPos)
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594 \param dirNode Node structure of directory
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595 \param dirPos Directory position
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597 char *FAT_ReadDir(tVFS_Node *dirNode, int dirpos)
\r
599 fat_filetable fileinfo[16]; //Sizeof=32, 16 per sector
\r
601 tFAT_VolInfo *disk = &gFAT_Disks[dirNode->ImplInt&7];
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602 Uint32 cluster, offset;
\r
609 ENTER("pDirNode iDirPos", dirNode, dirpos);
\r
611 // Get Byte Offset and skip
\r
612 offset = dirpos * sizeof(fat_filetable);
\r
613 preSkip = offset / (512 * disk->bootsect.spc);
\r
614 LOG("disk->bootsect.spc = %i", disk->bootsect.spc);
\r
615 LOG("dirNode->size = %i", dirNode->Size);
\r
616 cluster = dirNode->Inode; // Cluster ID
\r
619 // - Pre FAT32 had a reserved area for the root.
\r
620 if( disk->type == FAT32 || cluster != disk->rootOffset )
\r
622 //Skip previous clusters
\r
623 for(a=preSkip;a--;) {
\r
624 cluster = FAT_int_GetFatValue(disk, cluster);
\r
625 // Check for end of cluster chain
\r
626 if(cluster == -1) { LEAVE('n'); return NULL;}
\r
630 // Bounds Checking (Used to spot heap overflows)
\r
631 if(cluster > disk->clusterCount + 2)
\r
633 Warning("FAT_ReadDir - Cluster ID is over cluster count (0x%x>0x%x)",
\r
634 cluster, disk->clusterCount+2);
\r
639 LOG("cluster=0x%x, dirpos=%i", cluster, dirpos);
\r
642 // - Pre FAT32 cluster base (in sectors)
\r
643 if( cluster == disk->rootOffset && disk->type != FAT32 )
\r
644 offset = disk->bootsect.resvSectCount + cluster*disk->bootsect.spc;
\r
646 { // FAT32 cluster base (in sectors)
\r
647 offset = disk->firstDataSect;
\r
648 offset += (cluster - 2) * disk->bootsect.spc;
\r
650 // Sector in cluster
\r
651 if(disk->bootsect.spc != 1)
\r
652 offset += (dirpos / 16) % disk->bootsect.spc;
\r
653 // Offset in sector
\r
656 LOG("offset=%i, a=%i", offset, a);
\r
659 VFS_ReadAt(disk->fileHandle, offset*512, 512, fileinfo); // Read Dir Data
\r
661 LOG("name[0] = 0x%x", (Uint8)fileinfo[a].name[0]);
\r
662 //Check if this is the last entry
\r
663 if( fileinfo[a].name[0] == '\0' ) {
\r
664 dirNode->Size = dirpos;
\r
665 LOG("End of list");
\r
667 return NULL; // break
\r
670 // Check for empty entry
\r
671 if( (Uint8)fileinfo[a].name[0] == 0xE5 ) {
\r
672 LOG("Empty Entry");
\r
673 LEAVE('p', VFS_SKIP);
\r
674 return VFS_SKIP; // Skip
\r
678 // Get Long File Name Cache
\r
679 lfn = FAT_int_GetLFN(dirNode);
\r
680 if(fileinfo[a].attrib == ATTR_LFN)
\r
682 fat_longfilename *lfnInfo;
\r
685 lfnInfo = (fat_longfilename *) &fileinfo[a];
\r
686 if(lfnInfo->id & 0x40) memset(lfn, 0, 256);
\r
687 // Get the current length
\r
690 // Sanity Check (FAT implementations should not allow >255 bytes)
\r
691 if(len + 13 > 255) return VFS_SKIP;
\r
692 // Rebase all bytes
\r
693 for(a=len+1;a--;) lfn[a+13] = lfn[a];
\r
695 // Append new bytes
\r
696 lfn[ 0] = lfnInfo->name1[0]; lfn[ 1] = lfnInfo->name1[1];
\r
697 lfn[ 2] = lfnInfo->name1[2]; lfn[ 3] = lfnInfo->name1[3];
\r
698 lfn[ 4] = lfnInfo->name1[4];
\r
699 lfn[ 5] = lfnInfo->name2[0]; lfn[ 6] = lfnInfo->name2[1];
\r
700 lfn[ 7] = lfnInfo->name2[2]; lfn[ 8] = lfnInfo->name2[3];
\r
701 lfn[ 9] = lfnInfo->name2[4]; lfn[10] = lfnInfo->name2[5];
\r
702 lfn[11] = lfnInfo->name3[0]; lfn[12] = lfnInfo->name3[1];
\r
703 LEAVE('p', VFS_SKIP);
\r
708 //Check if it is a volume entry
\r
709 if(fileinfo[a].attrib & 0x08) {
\r
710 LEAVE('p', VFS_SKIP);
\r
714 if(fileinfo[a].name[0] == '.') {
\r
715 LEAVE('p', VFS_SKIP);
\r
719 LOG("name='%c%c%c%c%c%c%c%c.%c%c%c'\n",
\r
720 fileinfo[a].name[0], fileinfo[a].name[1], fileinfo[a].name[2], fileinfo[a].name[3],
\r
721 fileinfo[a].name[4], fileinfo[a].name[5], fileinfo[a].name[6], fileinfo[a].name[7],
\r
722 fileinfo[a].name[8], fileinfo[a].name[9], fileinfo[a].name[10] );
\r
725 //node = FAT_int_CreateNode(dirNode, &fileinfo[a], lfn);
\r
726 ret = FAT_int_CreateName(dirNode, &fileinfo[a], lfn);
\r
729 //node = FAT_int_CreateNode(dirNode, &fileinfo[a], NULL);
\r
730 ret = FAT_int_CreateName(dirNode, &fileinfo[a], NULL);
\r
738 * \fn tVFS_Node *FAT_FindDir(tVFS_Node *node, char *name)
\r
739 * \brief Finds an entry in the current directory
\r
741 tVFS_Node *FAT_FindDir(tVFS_Node *node, char *name)
\r
743 fat_filetable fileinfo[16];
\r
746 fat_longfilename *lfnInfo;
\r
748 int lfnPos=255, lfnId = -1;
\r
751 tVFS_Node *tmpNode;
\r
753 tFAT_VolInfo *disk = &gFAT_Disks[node->ImplInt];
\r
757 ENTER("pnode sname", node, name);
\r
760 if(!name || name[0] == '\0') {
\r
766 lfn = FAT_int_GetLFN(node);
\r
769 dirCluster = node->Inode;
\r
770 // Seek to Directory
\r
771 if( dirCluster == disk->rootOffset && disk->type != FAT32 )
\r
772 diskOffset = (disk->bootsect.resvSectCount+dirCluster*disk->bootsect.spc) << 9;
\r
774 diskOffset = (disk->firstDataSect+(dirCluster-2)*disk->bootsect.spc) << 9;
\r
779 if((i & 0xF) == 0) {
\r
780 //Log("FAT_FindDir: diskOffset = 0x%x", diskOffset);
\r
781 VFS_ReadAt(disk->fileHandle, diskOffset, 512, fileinfo);
\r
785 //Check if the files are free
\r
786 if(fileinfo[i&0xF].name[0] == '\0') break; //Free and last
\r
787 if(fileinfo[i&0xF].name[0] == '\xE5') goto loadCluster; //Free
\r
791 // Long File Name Entry
\r
792 if(fileinfo[i&0xF].attrib == ATTR_LFN)
\r
794 lfnInfo = (fat_longfilename *) &fileinfo[i&0xF];
\r
795 if(lfnInfo->id & 0x40) {
\r
796 memset(lfn, 0, 256);
\r
799 lfn[lfnPos--] = lfnInfo->name3[1]; lfn[lfnPos--] = lfnInfo->name3[0];
\r
800 lfn[lfnPos--] = lfnInfo->name2[5]; lfn[lfnPos--] = lfnInfo->name2[4];
\r
801 lfn[lfnPos--] = lfnInfo->name2[3]; lfn[lfnPos--] = lfnInfo->name2[2];
\r
802 lfn[lfnPos--] = lfnInfo->name2[1]; lfn[lfnPos--] = lfnInfo->name2[0];
\r
803 lfn[lfnPos--] = lfnInfo->name1[4]; lfn[lfnPos--] = lfnInfo->name1[3];
\r
804 lfn[lfnPos--] = lfnInfo->name1[2]; lfn[lfnPos--] = lfnInfo->name1[1];
\r
805 lfn[lfnPos--] = lfnInfo->name1[0];
\r
806 if((lfnInfo->id&0x3F) == 1)
\r
808 memcpy(lfn, lfn+lfnPos+1, 256-lfnPos);
\r
814 // Remove LFN if it does not apply
\r
815 if(lfnId != i) lfn[0] = '\0';
\r
817 // Get Real Filename
\r
818 FAT_int_ProperFilename(tmpName, fileinfo[i&0xF].name);
\r
820 LOG("tmpName = '%s'", tmpName);
\r
822 //Only Long name is case sensitive, 8.3 is not
\r
824 if(strucmp(tmpName, name) == 0 || strcmp(lfn, name) == 0) {
\r
826 if(strucmp(tmpName, name) == 0) {
\r
828 cluster = fileinfo[i&0xF].cluster | (fileinfo[i&0xF].clusterHi << 16);
\r
829 tmpNode = Inode_GetCache(disk->inodeHandle, cluster);
\r
830 if(tmpNode == NULL) // Node is not cached
\r
833 tmpNode = FAT_int_CreateNode(node, &fileinfo[i&0xF], lfn);
\r
835 tmpNode = FAT_int_CreateNode(node, &fileinfo[i&0xF], NULL);
\r
841 LEAVE('p', tmpNode);
\r
849 //Load Next cluster?
\r
850 if( ((i+1) >> 4) % disk->bootsect.spc == 0 && ((i+1) & 0xF) == 0)
\r
852 if( dirCluster == disk->rootOffset && disk->type != FAT32 )
\r
854 dirCluster = FAT_int_GetFatValue(disk, dirCluster);
\r
855 if(dirCluster == -1) break;
\r
856 diskOffset = (disk->firstDataSect+(dirCluster-2)*disk->bootsect.spc)*512;
\r
865 * \fn int FAT_Mknod(tVFS_Node *Node, char *Name, Uint Flags)
\r
866 * \brief Create a new node
\r
868 int FAT_Mknod(tVFS_Node *Node, char *Name, Uint Flags)
\r
874 * \fn int FAT_Relink(tVFS_Node *Node, char *OldName, char *NewName)
\r
875 * \brief Rename / Delete a file
\r
877 int FAT_Relink(tVFS_Node *Node, char *OldName, char *NewName)
\r
883 * \fn void FAT_CloseFile(tVFS_Node *Node)
\r
884 * \brief Close an open file
\r
886 void FAT_CloseFile(tVFS_Node *Node)
\r
888 if(Node == NULL) return ;
\r
890 Inode_UncacheNode(gFAT_Disks[Node->ImplInt].inodeHandle, Node->Inode);
\r
892 if( !Inode_GetCache(gFAT_Disks[Node->ImplInt].inodeHandle, Node->Inode)
\r
893 && Node->Flags & VFS_FFLAG_DIRECTORY)
\r
894 FAT_int_DelLFN(Node);
\r
895 else // Get Cache references the node, so dereference it
\r
896 Inode_UncacheNode(gFAT_Disks[Node->ImplInt].inodeHandle, Node->Inode);
\r
902 * \fn void fat_install()
\r
903 * \brief Add the FAT Filesystem to the VFS
\r
907 VFS_AddDriver( &gFAT_FSInfo );
\r