/**
* This function will set a hook function, which will be invoked when a memory
* block is allocated from heap memory.
*
* @param hook the hook function
*/
int efs_rename(struct dfs_filesystem* fs, const char* oldpath, const char* newpath)
{
FileRecord old_entry, new_entry;
FileLocation old_loc, new_loc;
efsl_fs* efsfs;
eint8 fatfilename[11];
efsfs = (efsl_fs*) fs->data ;
RT_ASSERT(efsfs != RT_NULL);
dir_getFatFileName((eint8 *)newpath, &fatfilename[0]);
/* parameters check */
if (strlen(oldpath) > DFS_PATH_MAX ||
strlen(newpath) > DFS_PATH_MAX ||
/* old path is a directory that contains newpath */
strncmp(oldpath, newpath, strlen(newpath)) == 0)
{
dfs_log(DFS_DEBUG_ERROR, ("old path is a directory that contains newpath"));
return -DFS_STATUS_EINVAL;
}
/* if can't find old direntry */
if(fs_findFile(&efsfs->filesystem, (eint8 *)oldpath, &old_loc, 0) == 0)
{
dfs_log(DFS_DEBUG_ERROR, ("can't find old direntry"));
return -DFS_STATUS_ENOENT;
}
dir_getFileStructure(&efsfs->filesystem, &old_entry, &old_loc);
/* if the new direntry exist */
if(fs_findFile(&efsfs->filesystem, (eint8 *)newpath, &new_loc, 0) > 0)
{
dfs_log(DFS_DEBUG_ERROR, ("new direntry existed"));
return -DFS_STATUS_ENOENT;
}
if(fs_findFreeFile(&efsfs->filesystem, (eint8 *)newpath, &new_loc, 0))
{
memCpy(&old_entry, &new_entry, sizeof(FileRecord));
memCpy(fatfilename, new_entry.FileName, 11);
dir_createDirectoryEntry(&efsfs->filesystem, &new_entry, &new_loc);
}
/* delete the old direntry */
old_entry.FileName[0] = 0xe5;
dir_updateDirectoryEntry(&efsfs->filesystem, &old_entry, &old_loc);
return 0;
}
/* ***************************************************************************\
* signed eint8 file_fopen(FileSystem *fs,File* file,eint8* filename)
* Description: This functions opens a file.
* This function is about to be redesigned. No Docs.
* Return value:
*/
esint8 file_fopen(File* file,FileSystem *fs,eint8* filename,eint8 mode)
{
FileLocation loc;
FileRecord wtmp;
eint8 fatfilename[LIST_MAXLENFILENAME];
euint32 sec;
dir_getFatFileName(filename,fatfilename);
switch(mode)
{
case MODE_READ:
if(fs_findFile(fs,filename,&loc,0)==1)
{
dir_getFileStructure(fs,&(file->DirEntry), &loc);
file_initFile(file,fs,&loc);
file_setAttr(file,FILE_STATUS_OPEN,1);
file_setAttr(file,FILE_STATUS_WRITE,0);
return(0);
}
return(-1);
break;
case MODE_WRITE:
if(fs_findFile(fs,filename,&loc,&sec)) /* File may NOT exist, but parent HAS to exist */
{
return(-2);
}
if(sec==0){ /* Parent dir does not exist */
return(-4);
}
if(fs_findFreeFile(fs,filename,&loc,0))
{
dir_createDefaultEntry(fs,&wtmp,fatfilename);
dir_createDirectoryEntry(fs,&wtmp,&loc);
memCpy(&wtmp,&(file->DirEntry),sizeof(wtmp));
file_initFile(file,fs,&loc);
sec=fs_getNextFreeCluster(file->fs,fs_giveFreeClusterHint(file->fs));
dir_setFirstCluster(file->fs,&(file->Location),sec);
fs_setFirstClusterInDirEntry(&(file->DirEntry),sec);
fs_initClusterChain(fs,&(file->Cache),sec);
fat_setNextClusterAddress(fs,sec,fat_giveEocMarker(fs));
file_setAttr(file,FILE_STATUS_OPEN,1);
file_setAttr(file,FILE_STATUS_WRITE,1);
return(0);
}
else
{
return(-3);
}
break;
case MODE_APPEND:
if(fs_findFile(fs,filename,&loc,0)==1) /* File exists */
{
dir_getFileStructure(fs,&(file->DirEntry), &loc);
file_initFile(file,fs,&loc);
if(file->Cache.FirstCluster==0){
sec=fs_getNextFreeCluster(file->fs,fs_giveFreeClusterHint(file->fs));
dir_setFirstCluster(file->fs,&(file->Location),sec);
fs_setFirstClusterInDirEntry(&(file->DirEntry),sec);
fat_setNextClusterAddress(fs,sec,fat_giveEocMarker(fs));
file_initFile(file,fs,&loc);
}
file_setpos(file,file->FileSize);
file_setAttr(file,FILE_STATUS_OPEN,1);
file_setAttr(file,FILE_STATUS_WRITE,1);
}
else /* File does not excist */
{
if(fs_findFreeFile(fs,filename,&loc,0))
{
dir_createDefaultEntry(fs,&wtmp,fatfilename);
dir_createDirectoryEntry(fs,&wtmp,&loc);
memCpy(&wtmp,&(file->DirEntry),sizeof(wtmp));
file_initFile(file,fs,&loc);
sec=fs_getNextFreeCluster(file->fs,fs_giveFreeClusterHint(file->fs));
dir_setFirstCluster(file->fs,&(file->Location),sec);
fs_setFirstClusterInDirEntry(&(file->DirEntry),sec);
fs_initClusterChain(fs,&(file->Cache),sec);
fat_setNextClusterAddress(fs,sec,fat_giveEocMarker(fs));
file_setAttr(file,FILE_STATUS_OPEN,1);
file_setAttr(file,FILE_STATUS_WRITE,1);
}
else
{
return(-3);
}
}
return(0);
break;
default:
return(-4);
break;
}
return(-5);
}