Added simple DataSources to replace parts of DataLoader

1 files changed, 64 insertions, 0 deletions

diff --git a/StarsEx/DataSource.h b/StarsEx/DataSource.h
new file mode 100644
index 0000000..3da58ca
--- /dev/null
+++ b/StarsEx/DataSource.h
@@ -0,0 +1,64 @@
+/*  Starshatter: The Open Source Project
+    Copyright (c) 2021-2022, Starshatter: The Open Source Project Contributors
+    Copyright (c) 2011-2012, Starshatter OpenSource Distribution Contributors
+    Copyright (c) 1997-2006, Destroyer Studios LLC.
+*/
+
+#ifndef DataSource_h
+#define DataSource_h
+
+#include <cstdint>
+
+#include "Archive.h"
+#include "List.h"
+#include "Text.h"
+
+
+class DataSource
+{
+public:
+    DataSource();
+    virtual ~DataSource();
+
+    virtual void SetPrefix(const char* prefix=nullptr);
+    virtual bool Find(const char* name) const = 0;
+    virtual int ListFiles(Text filter, List<Text>& items, bool recurse=false) const = 0;
+    virtual int Load(const char* name, std::uint8_t*& buf, bool null_terminate=false) const = 0;
+
+protected:
+    Text m_prefix;
+};
+
+
+class ArchiveDataSource : public DataSource
+{
+public:
+    explicit ArchiveDataSource(const char* name);
+    explicit ArchiveDataSource(DataArchive* archive);
+    ~ArchiveDataSource() override;
+
+    bool Find(const char* name) const override;
+    int ListFiles(Text filter, List<Text>& items, bool recurse=false) const override;
+    int Load(const char* name, std::uint8_t*& buf, bool null_terminate=false) const override;
+
+protected:
+    DataArchive* m_archive;
+};
+
+
+class FileSystemDataSource : public DataSource
+{
+public:
+    explicit FileSystemDataSource(const char* path="");
+    ~FileSystemDataSource() override;
+
+    bool Find(const char* name) const override;
+    int ListFiles(Text filter, List<Text>& items, bool recurse=false) const override;
+    int Load(const char* name, std::uint8_t*& buf, bool null_terminate=false) const override;
+
+protected:
+    const char* m_path;
+};
+
+
+#endif  // DataSource_h