From a3cf596d37e4116a7068daaa724270a0898cb7da Mon Sep 17 00:00:00 2001
From: Steven Barth <steven@midlink.org>
Date: Thu, 20 Nov 2008 19:39:40 +0000
Subject: [PATCH 1/1] More luci.cutil

---
 libs/core/luasrc/util.lua  |  3 +++
 libs/core/src/luci_cutil.c | 36 ++++++++++++++++++++++++------------
 2 files changed, 27 insertions(+), 12 deletions(-)

diff --git a/libs/core/luasrc/util.lua b/libs/core/luasrc/util.lua
index e49381125..53e46a99d 100644
--- a/libs/core/luasrc/util.lua
+++ b/libs/core/luasrc/util.lua
@@ -271,9 +271,12 @@ end
 --- Remove leading and trailing whitespace from given string value.
 -- @param str	String value containing whitespace padded data
 -- @return		String value with leading and trailing space removed
+--[[
 function trim(str)
 	return (str:gsub("^%s*(.-)%s*$", "%1"))
 end
+]]--
+trim = cutil.trim
 
 --- Count the occurences of given substring in given string.
 -- @param str		String to search in
diff --git a/libs/core/src/luci_cutil.c b/libs/core/src/luci_cutil.c
index 31bec041d..49a33ac94 100644
--- a/libs/core/src/luci_cutil.c
+++ b/libs/core/src/luci_cutil.c
@@ -153,23 +153,19 @@ static int luci_pcdata(lua_State *L) {
 		lua_pushnil(L);
 		return 1;
 	}
+	luaL_checkstring(L, 1);
 
 	/* Discard anything else */
 	lua_settop(L, 1);
 
-	/* tostring(obj) */
-	lua_pushvalue(L, lua_upvalueindex(1));
-	lua_insert(L, 1);
-	lua_call(L, 1, 1);
-
 	/* pattern */
-	lua_pushvalue(L, lua_upvalueindex(2));
+	lua_pushvalue(L, lua_upvalueindex(1));
 
 	/* repl */
-	lua_pushvalue(L, lua_upvalueindex(3));
+	lua_pushvalue(L, lua_upvalueindex(2));
 
 	/* get gsub function */
-	lua_getfield(L, -3, "gsub");
+	lua_getfield(L, 1, "gsub");
 	lua_insert(L, 1);
 
 	/* tostring(obj):gsub(pattern, repl) */
@@ -177,12 +173,27 @@ static int luci_pcdata(lua_State *L) {
 	return 1;
 }
 
+/* luci.cutil.trim(str) */
+static int luci_trim(lua_State *L) {
+	luaL_checkstring(L, 1);
+	lua_settop(L, 1);
+
+	/* pattern and repl */
+	lua_pushliteral(L, "^%s*(.-)%s*$");
+	lua_pushliteral(L, "%1");
+
+	/* get str.gsub */
+	lua_getfield(L, 1, "gsub");
+	lua_insert(L, 1);
+
+	/* str.gsub(str, pattern, repl) */
+	lua_call(L, 3, 1);
+	return 1;
+}
+
 
 /* Registration helper for luci.cutil.pcdata */
 static void luci__register_pcdata(lua_State *L) {
-	/* tostring */
-	lua_getfield(L, LUA_GLOBALSINDEX, "tostring");
-
 	/* pattern */
 	lua_pushliteral(L, "[&\"'<>]");
 
@@ -201,7 +212,7 @@ static void luci__register_pcdata(lua_State *L) {
 	lua_setfield(L, -2, ">");
 
 	/* register function */
-	lua_pushcclosure(L, luci_pcdata, 3);
+	lua_pushcclosure(L, luci_pcdata, 2);
 	lua_setfield(L, -2, "pcdata");
 }
 
@@ -209,6 +220,7 @@ static void luci__register_pcdata(lua_State *L) {
 static const luaL_Reg registry[] = {
 		{"class",		luci_class},
 		{"instanceof",	luci_instanceof},
+		{"trim",		luci_trim},
 		{ NULL,			NULL },
 };
 
-- 
2.11.0