From eb9018777664037e2d367b0040c6b2dce17ef150 Mon Sep 17 00:00:00 2001
From: Dan Ports <dan@codewithin.com>
Date: Sat, 23 Jun 2018 21:35:31 -0400
Subject: [PATCH] #2: Import util package.

---
 src/util/.manifest |  3 +++
 src/util/apis/util | 54 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 57 insertions(+)
 create mode 100644 src/util/.manifest
 create mode 100644 src/util/apis/util

diff --git a/src/util/.manifest b/src/util/.manifest
new file mode 100644
index 0000000..d6456c5
--- /dev/null
+++ b/src/util/.manifest
@@ -0,0 +1,3 @@
+{
+	description = "API with a handful of table-related helper functions"
+}
\ No newline at end of file
diff --git a/src/util/apis/util b/src/util/apis/util
new file mode 100644
index 0000000..1112ade
--- /dev/null
+++ b/src/util/apis/util
@@ -0,0 +1,54 @@
+-- The problem is that we call os.loadAPI multiple times, and CC loads and overwrites the API every time.
+-- We can either stash API variables in a global table like this or patch CC to load each API once.
+function initializeGlobalTable(name)
+	return getTable(_G, name)
+end
+
+function getCoroutineTable(name)
+	return getTable(getTable(initializeGlobalTable("coroutineStorage"), coroutine.running()), name)
+end
+
+function getTable(obj, key)
+	local value = obj[key]
+	if value == nil then
+		value = {}
+		obj[key] = value
+	end
+	return value
+end
+
+function getNextUnusedIndex(obj)
+	local id = 1
+	while obj[id] ~= nil do
+		id = id + 1
+	end
+	return id
+end
+
+function insertRange(obj, items)
+	for _, item in pairs(items) do
+		table.insert(obj, item)
+	end
+end
+
+function removeWhere(obj, test)
+	local position = 1
+	while position <= #obj do
+		if test(obj[position]) then
+			table.remove(obj, position)
+		else
+			position = position + 1
+		end
+	end
+end
+
+function deepClone(obj)
+	if type(obj) ~= "table" then
+		return obj
+	end
+	local clone = {}
+	for k, v in pairs(obj) do
+		clone[k] = deepClone(v)
+	end
+	return clone
+end
\ No newline at end of file