Merge pull request #1959 from mattn/string_hex

Implement String#hex

2 files changed, 17 insertions, 0 deletions

diff --git a/mrbgems/mruby-string-ext/src/string.c b/mrbgems/mruby-string-ext/src/string.c
index bb4b4c8fc..ce11da866 100644
--- a/mrbgems/mruby-string-ext/src/string.c
+++ b/mrbgems/mruby-string-ext/src/string.c
@@ -163,6 +163,12 @@ mrb_str_end_with(mrb_state *mrb, mrb_value self)
   return mrb_false_value();
 }
 
+static mrb_value
+mrb_str_hex(mrb_state *mrb, mrb_value self)
+{
+  return mrb_str_to_inum(mrb, self, 16, FALSE);
+}
+
 void
 mrb_mruby_string_ext_gem_init(mrb_state* mrb)
 {
@@ -176,6 +182,7 @@ mrb_mruby_string_ext_gem_init(mrb_state* mrb)
   mrb_define_method(mrb, s, "<<",              mrb_str_concat2,         MRB_ARGS_REQ(1));
   mrb_define_method(mrb, s, "start_with?",     mrb_str_start_with,      MRB_ARGS_REST());
   mrb_define_method(mrb, s, "end_with?",       mrb_str_end_with,        MRB_ARGS_REST());
+  mrb_define_method(mrb, s, "hex",             mrb_str_hex,             MRB_ARGS_NONE());
 }
 
 void
diff --git a/mrbgems/mruby-string-ext/test/string.rb b/mrbgems/mruby-string-ext/test/string.rb
index c951ea7e3..fc6e6d563 100644
--- a/mrbgems/mruby-string-ext/test/string.rb
+++ b/mrbgems/mruby-string-ext/test/string.rb
@@ -133,3 +133,13 @@ assert('String#rpartition') do
   assert_equal ["", "b", "aaaa"], "baaaa".rpartition("b")
   assert_equal ["", "", ""],      "".rpartition("a")
 end
+
+assert('String#hex') do
+  assert_equal 16, "10".hex
+  assert_equal 255, "ff".hex
+  assert_equal 16, "0x10".hex
+  assert_equal (-16), "-0x10".hex
+  assert_equal 0, "xyz".hex
+  assert_equal 16, "10z".hex
+  assert_equal 0, "".hex
+end