Make improvements

- Add hierarchical auto-completion to redbean's repl
- Fetch latest localtime() and strftime() from Eggert
- Shave a few milliseconds off redbean start latency
- Fix redbean repl with multi-line statements
- Make the Lua unix module code more elegant
- Harden Lua data structure serialization

third_party/lua/luaencodejsondata.c

@@ -25,8 +25,8 @@
 #include "third_party/lua/lauxlib.h"
 #include "third_party/lua/lua.h"
 
-int LuaEncodeJsonData(lua_State *L, char **buf, int level, char *numformat,
-                      int idx) {
+static int LuaEncodeJsonDataImpl(lua_State *L, char **buf, int level,
+                                 char *numformat, int idx) {
   char *s;
   bool isarray;
   size_t tbllen, z;
@@ -93,7 +93,7 @@ int LuaEncodeJsonData(lua_State *L, char **buf, int level, char *numformat,
           for (size_t i = 1; i <= tbllen; i++) {
             if (i > 1) appendw(buf, ',');
             lua_rawgeti(L, -1, i);  // table/-2, value/-1
-            LuaEncodeJsonData(L, buf, level - 1, numformat, -1);
+            LuaEncodeJsonDataImpl(L, buf, level - 1, numformat, -1);
             lua_pop(L, 1);
           }
         } else {
@@ -121,7 +121,7 @@ int LuaEncodeJsonData(lua_State *L, char **buf, int level, char *numformat,
               lua_remove(L, -1);   // remove copied key: tab/-3, key/-2, val/-1
             }
             appendw(buf, '"' | ':' << 010);
-            LuaEncodeJsonData(L, buf, level - 1, numformat, -1);
+            LuaEncodeJsonDataImpl(L, buf, level - 1, numformat, -1);
             lua_pop(L, 1);  // table/-2, key/-1
           }
           // stack: table/-1, as the key was popped by lua_next
@@ -137,3 +137,9 @@ int LuaEncodeJsonData(lua_State *L, char **buf, int level, char *numformat,
     unreachable;
   }
 }
+
+int LuaEncodeJsonData(lua_State *L, char **buf, char *numformat, int idx) {
+  int rc;
+  rc = LuaEncodeJsonDataImpl(L, buf, 64, numformat, idx);
+  return rc;
+}