warnings fixed

binding/lua/bench_test.lua

@@ -20,7 +20,7 @@ function printHelp()
 end
 
 if #arg < 2 then
-    printHelp(arg)
+    printHelp()
     return
 end
 
@@ -141,8 +141,8 @@ if handle == nil then
 end
 
 local lines = handle:lines()
-local sip_str, eip_str, s_region, region = "", "", "", ""
-local sip, mip, eip, err = 0, 0, 0, 0
+local sip_str, eip_str, s_region, region = "", "", "", nil
+local sip, eip, err = nil, nil, nil
 local count, c_time = 0, 0
 local s_time = xdb.now()
 for l in lines do

binding/lua/search_test.lua

@@ -19,7 +19,7 @@ function printHelp()
 end
 
 if #arg < 1 then
-    printHelp(arg)
+    printHelp()
     return
 end
 
@@ -135,7 +135,7 @@ print(string.format([[
 ip2region xdb searcher test program
 source xdb: %s (%s, %s)
 type 'quit' to exit]], dbFile, version.name, cachePolicy))
-local region, err = "", nil
+local region, err = nil, nil
 local ip_bytes, s_time, c_time = nil, 0, 0
 while true do
     io.write("ip2region>> ");

binding/lua/xdb_searcher.lua

@@ -133,7 +133,7 @@ function xdb:search(ip_bytes)
     local index_size, ip_sub_compare = version.index_size, version.ip_sub_compare
     local bytes, d_bytes = version.bytes, version.bytes << 1
     local data_ptr, data_len, p = 0, 0, 0
-    local sip, eip, err, buff = 0, 0, ""
+    local buff, err = nil, nil
     local l, m, h = 0, 0, (e_ptr - s_ptr) / index_size
     while l <= h do
         m = (l + h) >> 1

binding/lua_c/bench_test.lua

@@ -20,7 +20,7 @@ function printHelp()
 end
 
 if #arg < 2 then
-    printHelp(arg)
+    printHelp()
     return
 end
 
@@ -171,7 +171,7 @@ for l in lines do
 
         -- check the region
         if region ~= s_region then
-            printf(string.format("failed search(%s) with (%s != %s)\n", xdb.ip_to_string(ip_bytes), region, s_region))
+            print(string.format("failed search(%s) with (%s != %s)\n", xdb.ip_to_string(ip_bytes), region, s_region))
             return
         end
 

binding/lua_c/search_test.lua

@@ -19,7 +19,7 @@ function printHelp()
 end
 
 if #arg < 1 then
-    printHelp(arg)
+    printHelp()
     return
 end