int genders_load_data(genders_t handle, const char *filename);
genders_load_data() read and parses the genders file indicated
by filename. If filename is NULL,
genders_load_data() will attempt to read and parse the default
genders file defined by DEFAULT_GENDERS_FILE. handle is a
genders handle created by
After genders_load_data() is called, information about the
genders file is stored in the genders handle passed in. This
information is used by other genders C API functions. All future use
of handle with other genders C API functions will be directly
associated with the genders file indicated by filename (or the
default genders file if filename is NULL).
On success, 0 is returned. On error, -1 is returned, and an error
code is returned in handle. The error code can be retrieved via
, and a description of the error code can be retrieved via
Error codes are defined in genders.h.