Converting char arrays with literal escape sequences into char

Question

I have a C tokenizer library I'm using for a personal project.

It returns escaped characters as a char array of literals. So for example the string "\n" gets returned as this char array:

[][n]

Instead of this (desired) array:

[\n]

Is there an easy way in C to convert the first char array into the second char array without manual parsing?

Here is code example of what I'm after:

char test[2];
test[0] = '\\';
test[1] = 'n';
char c = someFunction(test)
printf("A %c B", c);

Desired Output:

A 
B

Is there a way to do this using any obscure tricks or do I need to roll my own function?

Thanks!