add setbyte

1 files changed, 62 insertions, 0 deletions

diff --git a/core/src/xmake/libc/setbyte.c b/core/src/xmake/libc/setbyte.c
new file mode 100644
index 000000000..298e056a6
--- /dev/null
+++ b/core/src/xmake/libc/setbyte.c
@@ -0,0 +1,62 @@
+/*!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, TBOOX Open Source Group.
+ *
+ * @author      ruki
+ * @file        setbyte.c
+ *
+ */
+
+/* //////////////////////////////////////////////////////////////////////////////////////
+ * trace
+ */
+#define TB_TRACE_MODULE_NAME    "setbyte"
+#define TB_TRACE_MODULE_DEBUG   (0)
+
+/* //////////////////////////////////////////////////////////////////////////////////////
+ * includes
+ */
+#include "prefix.h"
+
+/* //////////////////////////////////////////////////////////////////////////////////////
+ * implementation
+ */
+tb_int_t xm_libc_setbyte(lua_State* lua)
+{
+    // check
+    tb_assert_and_check_return_val(lua, 0);
+
+    // get data
+    tb_pointer_t data = tb_null;
+    if (xm_lua_ispointer(lua, 1))
+        data = (tb_pointer_t)xm_lua_topointer(lua, 1);
+    else if (lua_isstring(lua, 1))
+        data = (tb_pointer_t)luaL_checkstring(lua, 1);
+    else xm_libc_return_error(lua, "libc.setbyte(invalid data)!");
+
+    // get offset
+    tb_int_t offset = 0;
+    if (lua_isnumber(lua, 2))
+        offset = (tb_int_t)lua_tonumber(lua, 2);
+    else xm_libc_return_error(lua, "libc.setbyte(invalid offset)!");
+
+    // set byte
+    if (lua_isnumber(lua, 3))
+        ((tb_byte_t*)data)[offset] = (tb_byte_t)lua_tointeger(lua, 3);
+    else xm_libc_return_error(lua, "libc.setbyte(invalid value)!");
+    return 0;
+}
+
+