From acd93b877b931bec2ac37845ccf044507554a157 Mon Sep 17 00:00:00 2001
From: Christopher <Christopher@Puget-116075>
Date: Tue, 10 Dec 2013 23:58:09 -0500
Subject: [PATCH] add SegmentCache class

---
 Makefile         |  6 ++++--
 SegmentCache.cpp | 19 +++++++++++++++++++
 SegmentCache.h   | 30 ++++++++++++++++++++++++++++++
 trans.h          |  3 +++
 4 files changed, 56 insertions(+), 2 deletions(-)
 create mode 100644 SegmentCache.cpp
 create mode 100644 SegmentCache.h

diff --git a/Makefile b/Makefile
index 5071964..c774034 100644
--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,8 @@
-CXXFLAGS=-g
+CXXFLAGS=-g -std=c++11
 
 all: v6502
 
-v6502: v6502.o cpu.o nodes.o
+v6502: v6502.o cpu.o nodes.o SegmentCache.o
 	g++ $^ -o $@
 
 v6502.o: v6502.cpp cpu.h addressbus.h
@@ -11,6 +11,8 @@ cpu.o: cpu.cpp cpu.h addressbus.h nodes.h
 
 nodes.o: nodes.cpp nodes.h
 
+SegmentCache.o : SegmentCache.cpp SegmentCache.h
+
 clean:
 	-rm *.o
 	-rm v6502
diff --git a/SegmentCache.cpp b/SegmentCache.cpp
new file mode 100644
index 0000000..4cff130
--- /dev/null
+++ b/SegmentCache.cpp
@@ -0,0 +1,19 @@
+/* 
+ * File:   SegmentCache.cpp
+ * Author: cmosher
+ * 
+ * Created on December 10, 2013, 9:56 PM
+ */
+
+#include "SegmentCache.h"
+#include <string>
+#include <map>
+#include <memory>
+#include <algorithm>
+
+Segment* SegmentCache::getOrAdd(std::string& id) {
+    if (this->cache.find(id) == this->cache.end()) {
+        this->cache[id] = std::make_shared<Segment>(id);
+    }
+    return this->cache[id].get();
+}
diff --git a/SegmentCache.h b/SegmentCache.h
new file mode 100644
index 0000000..8f49772
--- /dev/null
+++ b/SegmentCache.h
@@ -0,0 +1,30 @@
+/* 
+ * File:   SegmentCache.h
+ * Author: Christopher
+ *
+ * Created on December 10, 2013, 9:56 PM
+ */
+
+#ifndef SEGMENTCACHE_H
+#define	SEGMENTCACHE_H
+
+#include "trans.h"
+#include <memory>
+#include <string>
+#include <map>
+
+class SegmentCache {
+public:
+    SegmentCache() {}
+    virtual ~SegmentCache() {}
+
+    Segment* getOrAdd(std::string& id);
+
+private:
+    std::map<std::string,std::shared_ptr<Segment>> cache;
+
+    SegmentCache(const SegmentCache&);
+    SegmentCache& operator=(const SegmentCache&);
+};
+
+#endif	/* SEGMENTCACHE_H */
diff --git a/trans.h b/trans.h
index 0329541..9e3f8c0 100644
--- a/trans.h
+++ b/trans.h
@@ -22,6 +22,9 @@ public:
     bool pullup;
     bool pulldown;
     bool on;
+
+    Segment(std::string& id) : id(id) {
+    }
 };
 
 class Trans {