1 files changed, 55 insertions, 0 deletions
diff --git a/mrbgems/mruby-symbol-ext/src/symbol.c b/mrbgems/mruby-symbol-ext/src/symbol.c
new file mode 100644
index 000000000..e2906d916
--- /dev/null
+++ b/mrbgems/mruby-symbol-ext/src/symbol.c
@@ -0,0 +1,55 @@
+#include "mruby.h"
+#include "mruby/khash.h"
+#include "mruby/array.h"
+
+typedef struct symbol_name {
+  size_t len;
+  const char *name;
+} symbol_name;
+
+KHASH_DECLARE(n2s, symbol_name, mrb_sym, 1)
+
+/*
+ *  call-seq:
+ *     Symbol.all_symbols    => array
+ *
+ *  Returns an array of all the symbols currently in Ruby's symbol
+ *  table.
+ *
+ *     Symbol.all_symbols.size    #=> 903
+ *     Symbol.all_symbols[1,20]   #=> [:floor, :ARGV, :Binding, :symlink,
+ *                                     :chown, :EOFError, :$;, :String,
+ *                                     :LOCK_SH, :"setuid?", :$<,
+ *                                     :default_proc, :compact, :extend,
+ *                                     :Tms, :getwd, :$=, :ThreadGroup,
+ *                                     :wait2, :$>]
+ */
+static mrb_value
+mrb_sym_all_symbols(mrb_state *mrb, mrb_value self)
+{
+  khiter_t k;
+  mrb_sym sym;
+  khash_t(n2s) *h = mrb->name2sym;
+  mrb_value ary = mrb_ary_new_capa(mrb, kh_size(h));
+
+  for (k = kh_begin(h); k != kh_end(h); k++) {
+    if (kh_exist(h, k)) {
+      sym = kh_value(h, k);
+      mrb_ary_push(mrb, ary, mrb_symbol_value(sym));
+    }
+  }
+
+  return ary;
+}
+
+void
+mrb_mruby_symbol_ext_gem_init(mrb_state* mrb)
+{
+  struct RClass *s = mrb->symbol_class;
+  mrb_define_class_method(mrb, s, "all_symbols", mrb_sym_all_symbols, ARGS_NONE());
+}
+
+void
+mrb_mruby_symbol_ext_gem_final(mrb_state* mrb)
+{
+}