SdFat Library what is dir_t*?

Question

I'm using the SDFat library and the FatFile type has the functions:

bool FatFile::dirEntry(dir_t* dir)

Return a file's directory entry.

Parameters

[out] dir Location for return of the file's directory entry.

Returns

The value true is returned for success and the value false is returned for failure.

And

uint8_t FatFile::dirName(const dir_t *dir, char *name)

Format the name field of dir into the 13 byte array name in standard 8.3 short name format.

Parameters

[in] dir The directory structure containing the name.

[out] name A 13 byte char array for the formatted name.

Returns

length of the name.

From what I understand, I should be able to pass something like this into the functions:

dir_t Bass;
char dName [13];
FatFile BrowseFile;
BrowseFile.open("/Folder1/File1.txt", O_RDONLY);
Serial.print(BrowseFile.dirEntry(&*Bass));
Serial.print(BrowseFile.dirName(Bass,*dName));
Serial.println(dName);

to which the program should output

1
[Folder1's 8.3 name length]
[Folder1's 8.3 name]

However, I'm getting an error and I can't find any included examples that use these two functions in a sketch. if someone could explain what I'm doing wrong, it would be greatly appreciated.

Answer 1

dir_t * is a pointer to a variable of type dir_t.

I don't know the API to which you refer, but the format for passing it would be:

dir_t Bass;
char dName[13];
BrowseFile.dirEntry(&Bass);
BrowseFile.dirName(&Bass, dName);
Serial.println(dName);

Answer 2

what is dir_t*?

a pointer to a data type called dir_t -> it must have been defined somewhere in your code/libraries used.