lib/standard/string: Fixed leaking Int.to_s method

[nit.git] / lib / standard / string.nit

diff --git a/lib/standard/string.nit b/lib/standard/string.nit
index 2c46179..2488f2e 100644 (file)
--- a/lib/standard/string.nit
+++ b/lib/standard/string.nit
@@ -1911,15 +1911,22 @@ redef class Int
                end
        end
 
+       # C function to calculate the length of the `NativeString` to receive `self`
+       private fun int_to_s_len: Int is extern "native_int_length_str"
+
        # C function to convert an nit Int to a NativeString (char*)
-       private fun native_int_to_s: NativeString is extern "native_int_to_s"
+       private fun native_int_to_s(nstr: NativeString, strlen: Int) is extern "native_int_to_s"
 
        # return displayable int in base 10 and signed
        #
        #     assert 1.to_s            == "1"
        #     assert (-123).to_s       == "-123"
        redef fun to_s do
-               return native_int_to_s.to_s
+               var nslen = int_to_s_len
+               var ns = new NativeString(nslen + 1)
+               ns[nslen] = '\0'
+               native_int_to_s(ns, nslen + 1)
+               return ns.to_s_with_length(nslen)
        end
 
        # return displayable int in hexadecimal