Remove whitespace from generated JSON output

Remove excess whitespace to reduce output size and increase encode
performance.

Suggested by: Zhang "agentzh" Yichun <agentzh@gmail.com>

3 files changed, 14 insertions, 13 deletions

diff --git a/NEWS b/NEWS
index a016d7b..fb71cec 100644
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,6 @@
 Version 1.0.1 (May 10 2011)
 * Added build support for OSX
+* Removed unnecessary whitespace from JSON output
 
 Version 1.0 (May 9 2011)
 * Initial release.
diff --git a/lua_cjson.c b/lua_cjson.c
index fa2d6a7..63b3d06 100644
--- a/lua_cjson.c
+++ b/lua_cjson.c
@@ -500,12 +500,12 @@ static void json_append_array(lua_State *l, json_config_t *cfg, strbuf_t *json,
 
     json_encode_descend(l, cfg);
 
-    strbuf_append_mem(json, "[ ", 2);
+    strbuf_append_char(json, '[');
 
     comma = 0;
     for (i = 1; i <= array_length; i++) {
         if (comma)
-            strbuf_append_mem(json, ", ", 2);
+            strbuf_append_char(json, ',');
         else
             comma = 1;
 
@@ -514,7 +514,7 @@ static void json_append_array(lua_State *l, json_config_t *cfg, strbuf_t *json,
         lua_pop(l, 1);
     }
 
-    strbuf_append_mem(json, " ]", 2);
+    strbuf_append_char(json, ']');
 
     cfg->current_depth--;
 }
@@ -538,14 +538,14 @@ static void json_append_object(lua_State *l, json_config_t *cfg,
     json_encode_descend(l, cfg);
 
     /* Object */
-    strbuf_append_mem(json, "{ ", 2);
+    strbuf_append_char(json, '{');
 
     lua_pushnil(l);
     /* table, startkey */
     comma = 0;
     while (lua_next(l, -2) != 0) {
         if (comma)
-            strbuf_append_mem(json, ", ", 2);
+            strbuf_append_char(json, ',');
         else
             comma = 1;
 
@@ -554,10 +554,10 @@ static void json_append_object(lua_State *l, json_config_t *cfg,
         if (keytype == LUA_TNUMBER) {
             strbuf_append_char(json, '"');
             json_append_number(l, json, -2, cfg->encode_refuse_badnum);
-            strbuf_append_mem(json, "\": ", 3);
+            strbuf_append_mem(json, "\":", 2);
         } else if (keytype == LUA_TSTRING) {
             json_append_string(l, json, -2);
-            strbuf_append_mem(json, ": ", 2);
+            strbuf_append_char(json, ':');
         } else {
             json_encode_exception(l, -2,
                                   "table key must be a number or string");
@@ -570,7 +570,7 @@ static void json_append_object(lua_State *l, json_config_t *cfg,
         /* table, key */
     }
 
-    strbuf_append_mem(json, " }", 2);
+    strbuf_append_char(json, '}');
 
     cfg->current_depth--;
 }
diff --git a/tests/test.lua b/tests/test.lua
index b1395b0..1408bb9 100755
--- a/tests/test.lua
+++ b/tests/test.lua
@@ -83,7 +83,7 @@ local encode_simple_tests = {
     { json.encode, { json.null }, true, { 'null' } },
     { json.encode, { true }, true, { 'true' } },
     { json.encode, { false }, true, { 'false' } },
-    { json.encode, { { } }, true, { '{  }' } },
+    { json.encode, { { } }, true, { '{}' } },
     { json.encode, { 10 }, true, { '10' } },
     { json.encode, { NaN },
       false, { "Cannot serialise number: must not be NaN or Inf" } },
@@ -117,15 +117,15 @@ local encode_table_tests = {
         return "Setting sparse array (true, 2, 3) / max depth (5)"
     end,
     { json.encode, { { [3] = "sparse test" } },
-      true, { '[ null, null, "sparse test" ]' } },
+      true, { '[null,null,"sparse test"]' } },
 
     { json.encode, { { [1] = "one", [4] = "sparse test" } },
-      true, { '[ "one", null, null, "sparse test" ]' } }, 
+      true, { '["one",null,null,"sparse test"]' } }, 
 
     { json.encode, { { [1] = "one", [5] = "sparse test" } },
-      true, { '{ "1": "one", "5": "sparse test" }' } }, 
+      true, { '{"1":"one","5":"sparse test"}' } }, 
 
-    { json.encode, { nested5 }, true, { '[ [ [ [ [ "nested" ] ] ] ] ]' } },
+    { json.encode, { nested5 }, true, { '[[[[["nested"]]]]]' } },
     { json.encode, { { nested5 } },
       false, { "Cannot serialise, excessive nesting (6)" } },
     { json.encode, { table_cycle },