1 files changed, 71 insertions, 0 deletions
diff --git a/core/src/xmake/utf8/codepoint.c b/core/src/xmake/utf8/codepoint.c
new file mode 100644
index 000000000..a8fff91dd
--- /dev/null
+++ b/core/src/xmake/utf8/codepoint.c
@@ -0,0 +1,71 @@
+/*!A cross-platform build utility based on Lua
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * Copyright (C) 2015-present, Xmake Open Source Community.
+ *
+ * @author      ruki
+ * @file        codepoint.c
+ *
+ */
+
+/* //////////////////////////////////////////////////////////////////////////////////////
+ * includes
+ */
+#include "utf8.h"
+
+/* //////////////////////////////////////////////////////////////////////////////////////
+ * private implementation
+ */
+static tb_bool_t xm_utf8_codepoint_cb(xm_utf8_int_t code, tb_cpointer_t udata) {
+    lua_State* lua = (lua_State*)udata;
+    tb_assert_and_check_return_val(lua, tb_false);
+
+    lua_pushinteger(lua, code);
+    return tb_true;
+}
+
+/* //////////////////////////////////////////////////////////////////////////////////////
+ * implementation
+ */
+
+/* codepoint(s, [i, [j [, lax]]]) -> returns codepoints for all
+ * characters that start in the range [i,j]
+ */
+tb_int_t xm_utf8_codepoint(lua_State *lua) {
+    size_t len;
+    tb_char_t const* s = luaL_checklstring(lua, 1, &len);
+    lua_Integer posi = xm_utf8_posrelat((tb_long_t)luaL_optinteger(lua, 2, 1), len);
+    lua_Integer pose = xm_utf8_posrelat((tb_long_t)luaL_optinteger(lua, 3, posi), len);
+    tb_bool_t lax = lua_toboolean(lua, 4);
+
+    luaL_argcheck(lua, posi >= 1, 2, "out of bounds");
+    luaL_argcheck(lua, pose <= (lua_Integer)len, 3, "out of bounds");
+
+    if (posi > pose) {
+        return 0;  // empty interval; return no values
+    }
+    if (pose - posi >= INT_MAX) { // (lua_Integer -> int) overflow?
+        return luaL_error(lua, "string slice too long");
+    }
+    
+    tb_int_t n = (tb_int_t)(pose - posi) + 1;
+    luaL_checkstack(lua, n, "string slice too long");
+
+    int nresults = lua_gettop(lua);
+    if (!xm_utf8_codepoint_impl(s, len, (tb_long_t)posi, (tb_long_t)pose, !lax, xm_utf8_codepoint_cb, lua)) {
+        return luaL_error(lua, XM_UTF8_MSGInvalid);
+    }
+    
+    return lua_gettop(lua) - nresults;
+}