From ea17d3262924f95a4fa721b3de6d7fe499bdcf14 Mon Sep 17 00:00:00 2001
From: Mike Buland <eichlan@xagasoft.com>
Date: Thu, 5 Apr 2012 22:52:54 +0000
Subject: Added unique function and a workaround for non-matching inputs to
 rules passing the rule input filter.

---
 src/functionplugger.cpp |  2 ++
 src/functionunique.cpp  | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 src/functionunique.h    | 16 ++++++++++++++++
 3 files changed, 65 insertions(+)
 create mode 100644 src/functionunique.cpp
 create mode 100644 src/functionunique.h

(limited to 'src')

diff --git a/src/functionplugger.cpp b/src/functionplugger.cpp
index 8bd2edd..1f2bcf5 100644
--- a/src/functionplugger.cpp
+++ b/src/functionplugger.cpp
@@ -21,6 +21,7 @@ extern Bu::PluginInfo pluginFunctionOpen;
 extern Bu::PluginInfo pluginFunctionClose;
 extern Bu::PluginInfo pluginFunctionRead;
 extern Bu::PluginInfo pluginFunctionWrite;
+extern Bu::PluginInfo pluginFunctionUnique;
 
 FunctionPlugger::FunctionPlugger()
 {
@@ -42,6 +43,7 @@ FunctionPlugger::FunctionPlugger()
 	registerBuiltinPlugin( &pluginFunctionClose );
 	registerBuiltinPlugin( &pluginFunctionRead );
 	registerBuiltinPlugin( &pluginFunctionWrite );
+	registerBuiltinPlugin( &pluginFunctionUnique );
 
 	DIR *dir = opendir("/usr/lib/build");
 	if( !dir )
diff --git a/src/functionunique.cpp b/src/functionunique.cpp
new file mode 100644
index 0000000..ca2461f
--- /dev/null
+++ b/src/functionunique.cpp
@@ -0,0 +1,47 @@
+#include "functionunique.h"
+
+#include <bu/hash.h>
+#include <bu/plugger.h>
+PluginInterface3( pluginFunctionUnique, unique, FunctionUnique, Function,
+		"Mike Buland", 0, 1 );
+
+FunctionUnique::FunctionUnique()
+{
+}
+
+FunctionUnique::~FunctionUnique()
+{
+}
+
+Bu::String FunctionUnique::getName() const
+{
+	return "unique";
+}
+
+Variable FunctionUnique::call( Variable &input, VarList lParams )
+{
+	if( lParams.getSize() > 0 )
+		throw Bu::ExceptionBase("Unique does not take any parameters.");
+	if( input.getType() != Variable::typeList )
+		throw Bu::ExceptionBase("unique does not work on non-list types.");
+
+	Bu::Hash<Bu::String, bool> hHas;
+
+	Variable vOut( Variable::typeList );
+	for( VarList::iterator i = input.begin(); i; i++ )
+	{
+		if( (*i).getType() != Variable::typeString )
+			continue;
+
+		Bu::String s = (*i).getString();
+		
+		if( hHas.has( s ) )
+			continue;
+
+		hHas.insert( s, true );
+		vOut.append( *i );
+	}
+
+	return vOut;
+}
+
diff --git a/src/functionunique.h b/src/functionunique.h
new file mode 100644
index 0000000..6bc4225
--- /dev/null
+++ b/src/functionunique.h
@@ -0,0 +1,16 @@
+#ifndef FUNCTION_UNIQUE_H
+#define FUNCTION_UNIQUE_H
+
+#include "function.h"
+
+class FunctionUnique : public Function
+{
+public:
+	FunctionUnique();
+	virtual ~FunctionUnique();
+
+	virtual Bu::String getName() const;
+	virtual Variable call( Variable &input, VarList lParams );
+};
+
+#endif
-- 
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