Use string_view for VFS lookups

apps/openmw_test_suite/testing_util.hpp

@@ -57,13 +57,13 @@ namespace TestingOpenMW
         {
         }
 
-        void listResources(std::map<std::string, VFS::File*>& out) override
+        void listResources(VFS::FileMap& out) override
         {
             for (const auto& [key, value] : mFiles)
                 out.emplace(VFS::Path::normalizeFilename(key), value);
         }
 
-        bool contains(const std::string& file) const override { return mFiles.count(file) != 0; }
+        bool contains(std::string_view file) const override { return mFiles.contains(file); }
 
         std::string getDescription() const override { return "TestData"; }
     };

components/vfs/archive.hpp

@@ -3,6 +3,7 @@
 
 #include <filesystem>
 #include <map>
+#include <string_view>
 
 #include <components/files/istreamptr.hpp>
 
@@ -19,16 +20,18 @@ namespace VFS
         virtual std::filesystem::path getPath() = 0;
     };
 
+    using FileMap = std::map<std::string, File*, std::less<>>;
+
     class Archive
     {
     public:
         virtual ~Archive() = default;
 
         /// List all resources contained in this archive.
-        virtual void listResources(std::map<std::string, File*>& out) = 0;
+        virtual void listResources(FileMap& out) = 0;
 
         /// True if this archive contains the provided normalized file.
-        virtual bool contains(const std::string& file) const = 0;
+        virtual bool contains(std::string_view file) const = 0;
 
         virtual std::string getDescription() const = 0;
     };

components/vfs/bsaarchive.hpp

@@ -48,7 +48,7 @@ namespace VFS
 
         virtual ~BsaArchive() {}
 
-        void listResources(std::map<std::string, File*>& out) override
+        void listResources(FileMap& out) override
         {
             for (auto& resource : mResources)
             {
@@ -59,7 +59,7 @@ namespace VFS
             }
         }
 
-        bool contains(const std::string& file) const override
+        bool contains(std::string_view file) const override
         {
             for (const auto& it : mResources)
             {

components/vfs/filesystemarchive.cpp

@@ -17,7 +17,7 @@ namespace VFS
     {
     }
 
-    void FileSystemArchive::listResources(std::map<std::string, File*>& out)
+    void FileSystemArchive::listResources(FileMap& out)
     {
         if (!mBuiltIndex)
         {
@@ -51,14 +51,12 @@ namespace VFS
         }
         else
         {
-            for (index::iterator it = mIndex.begin(); it != mIndex.end(); ++it)
-            {
-                out[it->first] = &it->second;
-            }
+            for (auto& [k, v] : mIndex)
+                out[k] = &v;
         }
     }
 
-    bool FileSystemArchive::contains(const std::string& file) const
+    bool FileSystemArchive::contains(std::string_view file) const
     {
         return mIndex.find(file) != mIndex.end();
     }

components/vfs/filesystemarchive.hpp

@@ -27,16 +27,14 @@ namespace VFS
     public:
         FileSystemArchive(const std::filesystem::path& path);
 
-        void listResources(std::map<std::string, File*>& out) override;
+        void listResources(FileMap& out) override;
 
-        bool contains(const std::string& file) const override;
+        bool contains(std::string_view file) const override;
 
         std::string getDescription() const override;
 
     private:
-        typedef std::map<std::string, FileSystemArchiveFile> index;
-        index mIndex;
-
+        std::map<std::string, FileSystemArchiveFile, std::less<>> mIndex;
         bool mBuiltIndex;
         std::filesystem::path mPath;
     };

components/vfs/manager.cpp

@@ -35,11 +35,11 @@ namespace VFS
         return getNormalized(Path::normalizeFilename(name));
     }
 
-    Files::IStreamPtr Manager::getNormalized(const std::string& normalizedName) const
+    Files::IStreamPtr Manager::getNormalized(std::string_view normalizedName) const
     {
-        std::map<std::string, File*>::const_iterator found = mIndex.find(normalizedName);
+        const auto found = mIndex.find(normalizedName);
         if (found == mIndex.end())
-            throw std::runtime_error("Resource '" + normalizedName + "' not found");
+            throw std::runtime_error("Resource '" + std::string(normalizedName) + "' not found");
         return found->second->open();
     }
 

components/vfs/manager.hpp

@@ -41,7 +41,7 @@ namespace VFS
         class RecursiveDirectoryIterator
         {
         public:
-            RecursiveDirectoryIterator(std::map<std::string, File*>::const_iterator it)
+            RecursiveDirectoryIterator(FileMap::const_iterator it)
                 : mIt(it)
             {
             }
@@ -55,7 +55,7 @@ namespace VFS
             }
 
         private:
-            std::map<std::string, File*>::const_iterator mIt;
+            FileMap::const_iterator mIt;
         };
 
         using RecursiveDirectoryRange = IteratorPair<RecursiveDirectoryIterator>;
@@ -83,7 +83,7 @@ namespace VFS
         /// Retrieve a file by name (name is already normalized).
         /// @note Throws an exception if the file can not be found.
         /// @note May be called from any thread once the index has been built.
-        Files::IStreamPtr getNormalized(const std::string& normalizedName) const;
+        Files::IStreamPtr getNormalized(std::string_view normalizedName) const;
 
         std::string getArchive(std::string_view name) const;
 
@@ -101,7 +101,7 @@ namespace VFS
     private:
         std::vector<std::unique_ptr<Archive>> mArchives;
 
-        std::map<std::string, File*> mIndex;
+        FileMap mIndex;
     };
 
 }