Using Matlab Generated Enumerators of External C Library

Matlab generates String representations for enumerator types when loading an external library using loadlibrary. It is then possible to pass enumerators as string or values when calling library functions with calllib. When enumerator values are returned, Matlab will return the string representation. The question is:

Are there Matlab functions to convert between enumerator value its string representation (and vice-versa) by the user?

Note: enum2val is not relevant since it works on Matlab Class Enumerators and not on those Auto-Generated from the external library h files.

Unless...it is: I would guess Matlab utilizes existing functionality and maybe it Auto-Generates Matlab Classes for the enumerators of external libraries. In this case the 'type' value used in enum2val would have to be built from combination of library name and enumerator name.

Thanks ! Alon

Answer 1

[Philip Borghesani]

There is no straight forward way of doing this other then to write your own converter in C.

typedef enum Enum1 {en1=1,en2,en4=4} TEnum1;
Enum1 enumStr(Enum1 val) { return val; }  // returns string in MATLAB
int32 enumInt(Enum1 val) { return (int32)val; }  // returns numeric value in MATLAB

[Alon Meirson]

Thanks Philip. I have considered this idea myself. Was hoping Matlab has a better option as they had to implement it internally...