add readline.get_history_state()

3 files changed, 98 insertions, 3 deletions

diff --git a/core/src/xmake/machine.c b/core/src/xmake/machine.c
index 8eca36a8b..e31a75abf 100644
--- a/core/src/xmake/machine.c
+++ b/core/src/xmake/machine.c
@@ -106,6 +106,7 @@ tb_int_t xm_sandbox_interactive(lua_State* lua);
 #ifdef XM_CONFIG_API_HAVE_READLINE
 // the readline functions
 tb_int_t xm_readline_readline(lua_State* lua);
+tb_int_t xm_readline_get_history_state(lua_State* lua);
 #endif
 
 /* //////////////////////////////////////////////////////////////////////////////////////
@@ -182,8 +183,9 @@ static luaL_Reg const g_sandbox_functions[] =
 // the readline functions
 static luaL_Reg const g_readline_functions[] =
 {
-    { "readline",       xm_readline_readline   }
-,   { tb_null,          tb_null                }
+    { "readline",          xm_readline_readline          }
+,   { "get_history_state", xm_readline_get_history_state }
+,   { tb_null,             tb_null                       }
 };
 #endif
 
diff --git a/core/src/xmake/makefile b/core/src/xmake/makefile
index 49de9cc8e..6150c564d 100644
--- a/core/src/xmake/makefile
+++ b/core/src/xmake/makefile
@@ -50,7 +50,8 @@ xmake_C_FILES 			+= \
 						process/waitlist \
 						process/close \
 						sandbox/interactive \
-						readline/readline
+						readline/readline \
+						readline/get_history_state
 						
 
 # flags
diff --git a/core/src/xmake/readline/get_history_state.c b/core/src/xmake/readline/get_history_state.c
new file mode 100644
index 000000000..5b2acc4ac
--- /dev/null
+++ b/core/src/xmake/readline/get_history_state.c
@@ -0,0 +1,92 @@
+/*!The Make-like Build Utility based on Lua
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 - 2017, TBOOX Open Source Group.
+ *
+ * @author      TitanSnow
+ * @file        get_history_state.c
+ *
+ */
+
+#ifdef XM_CONFIG_API_HAVE_READLINE
+
+/* //////////////////////////////////////////////////////////////////////////////////////
+ * trace
+ */
+#define TB_TRACE_MODULE_NAME                "get_history_state"
+#define TB_TRACE_MODULE_DEBUG               (0)
+
+/* //////////////////////////////////////////////////////////////////////////////////////
+ * includes
+ */
+#include "prefix.h"
+
+/* //////////////////////////////////////////////////////////////////////////////////////
+ * implementation
+ */
+
+// get_history_state wrapper
+tb_int_t xm_readline_get_history_state(lua_State* lua)
+{
+    // check
+    tb_assert_and_check_return_val(lua, 0);
+
+    // HISTORY_STATE table
+    lua_newtable(lua);
+    HISTORY_STATE *hs = history_get_history_state();
+    // field offset
+    lua_pushstring(lua, "offset");
+    lua_pushinteger(lua, hs -> offset);
+    lua_settable(lua, -3);
+    // field length
+    lua_pushstring(lua, "length");
+    lua_pushinteger(lua, hs -> length);
+    lua_settable(lua, -3);
+    // field size
+    lua_pushstring(lua, "size");
+    lua_pushinteger(lua, hs -> size);
+    lua_settable(lua, -3);
+    // field flags
+    lua_pushstring(lua, "flags");
+    lua_pushinteger(lua, hs -> flags);
+    lua_settable(lua, -3);
+    // field entries
+    lua_pushstring(lua, "entries");
+    lua_newtable(lua);
+    for (HIST_ENTRY **p = hs -> entries; *p; ++p)
+    {
+        lua_newtable(lua);
+        // field line
+        lua_pushstring(lua, "line");
+        lua_pushstring(lua, (*p) -> line);
+        lua_settable(lua, -3);
+        // field timestamp
+        lua_pushstring(lua, "timestamp");
+        lua_pushstring(lua, (*p) -> timestamp);
+        lua_settable(lua, -3);
+
+        // set back
+        lua_rawseti(lua, -2, p - hs -> entries + 1);
+    }
+    lua_settable(lua, -3);
+
+    // ok
+    return 1;
+}
+
+#endif