// File Access
FAT_FILE_HANDLE Fat_FileOpen(FAT_HANDLE Fat, const char *pFilename){
bool bFind = FALSE;
FAT_BROWSE_HANDLE hBrowse;
FILE_CONTEXT FileContext;
FAT_FILE_INFO *pFile = 0;
if (Fat_FileBrowseBegin(Fat, &hBrowse)){
while (!bFind && Fat_FileBrowseNext(&hBrowse, &FileContext)){
if (FileContext.bLongFilename){
bFind = fatSameLongFilename((alt_u16 *)FileContext.szName, (alt_u16 *)pFilename);
}else{
if (strcmpi(FileContext.szName, pFilename) == 0)
bFind = TRUE;
}
} // while
if (bFind){
pFile = malloc(sizeof(FAT_FILE_INFO));
if (pFile){
pFile->OpenAttribute = FILE_OPEN_READ;
pFile->SeekPos = 0;
pFile->Directory = FileContext;
pFile->IsOpened = TRUE;
pFile->Cluster = FileContext.FirstLogicalCluster;
pFile->ClusterSeq = 0;
pFile->Fat = Fat;
}
}
}
return (FAT_FILE_HANDLE)pFile;
}
bool Fat_FileExist(FAT_HANDLE Fat, const char *pFilename){
bool bFind = FALSE;
FAT_BROWSE_HANDLE hBrowse;
FILE_CONTEXT FileContext;
if (Fat_FileBrowseBegin(Fat, &hBrowse)){
while (!bFind && Fat_FileBrowseNext(&hBrowse, &FileContext)){
if (FileContext.bLongFilename){
bFind = fatSameLongFilename((alt_u16 *)FileContext.szName, (alt_u16 *)pFilename);
}else{
if (strcmpi(FileContext.szName, pFilename) == 0)
bFind = TRUE;
}
} // while
Fat_FileClose(Fat);
}
return bFind;
}