D C Function Descriptions

The C API differs from the Fortran API in the following ways:

(1)

Arrays are identified using pointers of type “Ary *” rather than integer values.

(2)

Values representing pixel indices or counts are stored in variables of type “hdsdim”. This will be a 4 or 8 byte integer type, depending on the version of the installed HDS library.

(3)

HDS locators are passed as pointers of type “HDSLoc *” rather than as character strings.