static void test_root_entries_print()
{
FAT_PRINT("Root Entries info :\n");
int ret = 0;
const char * file_name = "a.img.flp";
//1. alloc mem
size_t re_size = 224 * 32;
uchar * pre = (uchar *) malloc(sizeof(uchar) * re_size);
assert(pre);
//2. read dev with root directory sectors
DECLARE_DEVICE_R(fdev, file_name);
ret = fat_dev_read(&fdev, 19*512, (uchar*)pre, re_size);
assert(ret == re_size);
fat_dev_destroy(&fdev);
//3. print the entries
fat_root_entries_print(pre, re_size);
const char * fn = "A.TXT";
FAT_DEBUG("find the file name is [%s]\n", fn);
fat_dentry_t * ptr =fat_find_entry_in_sector(pre, re_size, fn);
if(NULL != ptr){
FAT_DEBUG("find the dentry with file_name 0x%X\n", ptr);
}
else{
FAT_DEBUG("can not find the dentry with file_name [%s]\nn",fn);
}
//4. free the mem
free(pre); pre = NULL;
FAT_PRINT("Finished......\n\n");
}
int fat_stat_fat_info(uchar *buf, size_t size)
{
assert(buf && size % 3 == 0);
int bad_cluster_cnt = 0;
int zero_cluster_cnt = 0;
int used_cluster_cnt = 0;
int val = 0;
size_t i;
for(i = 0; i < size%3*2; ++i)
{
val = offset_to_cluster_val(buf, clusno_to_offset(i));
if(val == NOT_USED_CLUSTER)
++zero_cluster_cnt;
else if(val >= BAD_CLUSTER_NO_START && val <= BAD_CLUSTER_NO_END)
++ bad_cluster_cnt;
else
++ used_cluster_cnt;
}
FAT_DEBUG("zero cluster : %d\n", zero_cluster_cnt);
FAT_DEBUG("bad cluster : %d\n", zero_cluster_cnt);
FAT_DEBUG("used cluster : %d\n", zero_cluster_cnt);
return 0 ;
}
bool Fat_FileRead(FAT_FILE_HANDLE hFileHandle, void *pBuffer, const int nBufferSize){
FAT_FILE_INFO *f = (FAT_FILE_INFO *)hFileHandle;
VOLUME_INFO *pVol;
alt_u32 Pos, PhysicalSecter, NextCluster, Cluster;
alt_u32 BytesPerCluster, nReadCount=0, nClusterSeq;
int s;
bool bSuccess= TRUE;
if (!f || !f->Fat)
return FALSE;
pVol = (VOLUME_INFO *)f->Fat;
if (!f->IsOpened){
FAT_DEBUG(("[FAT] Fat_FileRead, file not opened\r\n"));
return bSuccess;
}
BytesPerCluster = pVol->nBytesPerCluster; //gVolumeInfo.BPB_BytsPerSec * gVolumeInfo.BPB_SecPerCluster;
Pos = f->SeekPos;
if (BytesPerCluster == 32768){
nClusterSeq = Pos >> 15;
Pos -= (f->ClusterSeq << 15);
}else if (BytesPerCluster == 16384){
