_module()">intPL_get_module(term_t
+t, module_t *module)If t is an atom, the system will look up or create the
corresponding module and assign an opaque pointer to it over module.
int PL_get_arg(size_t
index, term_t +t, term_t -a) If t is compound and index is between 1 and arity
(inclusive), assign a with a term reference to the argument.
int _PL_get_arg(size_t
index, term_t +t, term_t -a) Same as PL_get_arg(),
but no checking is performed, neither whether t is actually a
term nor whether index is a valid argument index.
12.4.3.3 Exchanging text using length and string
All internal text representation in SWI-Prolog is represented using
char * plus length and allow for 0-bytes in them.
The foreign library supports this by implementing a *_nchars() function
for each applicable *_chars() function. Below we briefly present the
signatures of these functions. For full documentation consult the
*_chars() function.
- int PL_get_atom_nchars(term_t t, size_t *len, char **s)
- See PL_get_atom_chars().
- int PL_get_list_nchars(term_t t, size_t *len, char **s)
- See PL_get_list_chars().
- int PL_get_nchars(term_t t, size_t *len, char **s, unsigned int flags)
- See PL_get_chars().
- int PL_put_atom_nchars(term_t t, size_t len, const char *s)
- See PL_put_atom_chars().
- int PL_put_string_nchars(term_t t, size_t len, const char *s)
- See PL_put_string_chars().
- int PL_put_list_ncodes(term_t t, size_t len, const char *s)
- See PL_put_list_codes().
- int PL_put_list_nchars(term_t t, size_t len, const char *s)
- See PL_put_list_chars().
- int PL_unify_atom_nchars(term_t t, size_t len, const char *s)
- See PL_unify_atom_chars().
- int PL_unify_string_nchars(term_t t, size_t len, const char *s)
- See PL_unify_string_chars().
- int PL_unify_list_ncodes(term_t t, size_t len, const char *s)
- See PL_unify_codes().
- int