From 835fcd2f79e8848fa0d92be667c0e02952e23436 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Fri, 4 Jan 2013 19:29:58 +0200
Subject: [PATCH] Add a method to filter the files loaded from a pack

---
 source/packsource.cpp | 40 +++++++++++++++++++++++++++++++++-------
 source/packsource.h   |  6 +++++-
 2 files changed, 38 insertions(+), 8 deletions(-)

diff --git a/source/packsource.cpp b/source/packsource.cpp
index c06b270..d054e1d 100644
--- a/source/packsource.cpp
+++ b/source/packsource.cpp
@@ -1,4 +1,5 @@
 #include <msp/strings/format.h>
+#include <msp/strings/regex.h>
 #include "collection.h"
 #include "packsource.h"
 
@@ -9,11 +10,26 @@ namespace DataFile {
 
 void PackSource::add_pack_file(const string &fn)
 {
-	packs.push_back(Pack(fn));
-	Pack &pack = packs.back();
-	DataFile::load(pack, fn);
+	add_pack_file(fn, string());
+}
+
+void PackSource::add_pack_file(const string &fn, const string &filter)
+{
+	Pack *pack = 0;
+	for(list<Pack>::iterator i=packs.begin(); (!pack && i!=packs.end()); ++i)
+		if(i->get_filename()==fn)
+			pack = &*i;
+	if(!pack)
+	{
+		packs.push_back(Pack(fn));
+		pack = &packs.back();
+		DataFile::load(*pack, fn);
+	}
 
-	pack.collect_objects(objects);
+	FileMap pack_files;
+	pack->collect_files(pack_files, filter);
+	for(FileMap::const_iterator i=pack_files.begin(); i!=pack_files.end(); ++i)
+		i->second->collect_objects(objects);
 }
 
 bool PackSource::is_loadable(const CollectionItemTypeBase &type, const string &name) const
@@ -76,10 +92,20 @@ PackSource::Pack::Pack(const string &fn):
 	base_offset(0)
 { }
 
-void PackSource::Pack::collect_objects(ObjectMap &objs) const
+void PackSource::Pack::collect_files(FileMap &fm, const string &filter) const
 {
-	for(list<File>::const_iterator i=files.begin(); i!=files.end(); ++i)
-		i->collect_objects(objs);
+	if(filter.empty())
+	{
+		for(list<File>::const_iterator i=files.begin(); i!=files.end(); ++i)
+			fm[i->get_filename()] = &*i;
+	}
+	else
+	{
+		Regex re(filter);
+		for(list<File>::const_iterator i=files.begin(); i!=files.end(); ++i)
+			if(re.match(i->get_filename()))
+				fm[i->get_filename()] = &*i;
+	}
 }
 
 
diff --git a/source/packsource.h b/source/packsource.h
index e2c84a0..f552d2a 100644
--- a/source/packsource.h
+++ b/source/packsource.h
@@ -25,6 +25,7 @@ private:
 	class File;
 	struct Object;
 
+	typedef std::map<std::string, const File *> FileMap;
 	typedef std::map<std::string, const Object *> ObjectMap;
 
 	class Pack
@@ -49,7 +50,7 @@ private:
 		const std::string &get_filename() const { return filename; }
 		unsigned get_base_offset() const { return base_offset; }
 
-		void collect_objects(ObjectMap &) const;
+		void collect_files(FileMap &, const std::string &) const;
 	};
 
 	class File
@@ -109,6 +110,9 @@ public:
 	/// Adds a pack file to load objects from.  The index is read immediately.
 	void add_pack_file(const std::string &);
 
+	/** Adds a pack file with a regex to filter logical files.  The index is
+	read on the first call; subsequent calls will use cached data. */
+	void add_pack_file(const std::string &, const std::string &);
 
 	virtual bool is_loadable(const CollectionItemTypeBase &, const std::string &) const;
 	virtual NameList get_names(const CollectionItemTypeBase &) const;
-- 
2.43.0