+
+static SCM
+accumulate_symbol (void *closure, SCM key, SCM val, SCM result)
+{
+ (void) closure;
+ (void) val;
+ return scm_cons (key, result);
+}
+
+LY_DEFINE(ly_hash_table_keys, "ly:hash-table-keys",
+ 1,0,0, (SCM tab),
+ "return a list of keys in @var{tab}")
+{
+ return scm_internal_hash_fold ((Hash_closure_function) & accumulate_symbol,
+ NULL, SCM_EOL, tab);
+}
+
+LY_DEFINE (ly_camel_case_to_lisp_identifier, "ly:camel-case->lisp-identifier",
+ 1, 0, 0, (SCM name_sym),
+ "Convert FooBar to foo-bar style symbol.")
+{
+ SCM_ASSERT_TYPE(scm_is_symbol (name_sym), name_sym,
+ SCM_ARG1, __FUNCTION__, "symbol");
+
+ /*
+ TODO: should use strings instead?
+ */
+
+ const string in = ly_symbol2string (name_sym);
+
+ vector<char> out;
+
+ /* don't add '-' before first character */
+ out.push_back (tolower (in[0]));
+
+ for (size_t inpos = 1; inpos < in.size (); inpos++)
+ {
+ if (isupper (in[inpos]))
+ out.push_back ('-');
+ out.push_back (tolower (in[inpos]));
+ }
+
+ string result (&out[0], out.size ());
+ return ly_symbol2scm (result.c_str ());
+}