From 2a01050a0cf0826f25240e2cb407535394ee360f Mon Sep 17 00:00:00 2001
From: kwolekr <kwolekr@minetest.net>
Date: Sun, 9 Feb 2014 12:38:50 -0500
Subject: Add capability to read table flag fields from Lua API

---
 src/script/common/c_content.cpp | 41 +++++++++++++++++++++++++++++++++++++++--
 src/script/common/c_content.h   |  3 +++
 2 files changed, 42 insertions(+), 2 deletions(-)

(limited to 'src/script/common')

diff --git a/src/script/common/c_content.cpp b/src/script/common/c_content.cpp
index d1e182f9f..4e26dc245 100644
--- a/src/script/common/c_content.cpp
+++ b/src/script/common/c_content.cpp
@@ -842,8 +842,45 @@ void push_hit_params(lua_State *L,const HitParams &params)
 u32 getflagsfield(lua_State *L, int table, const char *fieldname,
 	FlagDesc *flagdesc, u32 *flagmask)
 {
-	std::string flagstring = getstringfield_default(L, table, fieldname, "");
-	return readFlagString(flagstring, flagdesc, flagmask);
+	u32 flags = 0;
+	
+	lua_getfield(L, table, fieldname);
+
+	if (lua_isstring(L, -1)) {
+		std::string flagstr = lua_tostring(L, -1);
+		flags = readFlagString(flagstr, flagdesc, flagmask);
+	} else if (lua_istable(L, -1)) {
+		flags = read_flags_table(L, -1, flagdesc, flagmask);
+	}
+
+	lua_pop(L, 1);
+
+	return flags;
+}
+
+u32 read_flags_table(lua_State *L, int table, FlagDesc *flagdesc, u32 *flagmask)
+{
+	u32 flags = 0, mask = 0;
+	char fnamebuf[64] = "no";
+
+	for (int i = 0; flagdesc[i].name; i++) {
+		bool result;
+
+		if (getboolfield(L, table, flagdesc[i].name, result)) {
+			mask |= flagdesc[i].flag;
+			if (result)
+				flags |= flagdesc[i].flag;
+		}
+
+		strlcpy(fnamebuf + 2, flagdesc[i].name, sizeof(fnamebuf) - 2);
+		if (getboolfield(L, table, fnamebuf, result))
+			mask |= flagdesc[i].flag;
+	}
+
+	if (flagmask)
+		*flagmask = mask;
+
+	return flags;
 }
 
 /******************************************************************************/
diff --git a/src/script/common/c_content.h b/src/script/common/c_content.h
index a89de1aad..61617d7ab 100644
--- a/src/script/common/c_content.h
+++ b/src/script/common/c_content.h
@@ -123,6 +123,9 @@ u32                getflagsfield             (lua_State *L, int table,
                                               const char *fieldname,
                                               FlagDesc *flagdesc, u32 *flagmask);
 
+u32                read_flags_table          (lua_State *L, int table,
+                                              FlagDesc *flagdesc, u32 *flagmask);
+
 void               push_items                (lua_State *L,
                                               const std::vector<ItemStack> &items);
 
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