1 files changed, 92 insertions, 0 deletions
diff --git a/plugins/FreeImage/Source/CacheFile.h b/plugins/FreeImage/Source/CacheFile.h
new file mode 100644
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+++ b/plugins/FreeImage/Source/CacheFile.h
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+// ==========================================================
+// Multi-Page functions
+//
+// Design and implementation by
+// - Floris van den Berg (flvdberg@wxs.nl)
+//
+// This file is part of FreeImage 3
+//
+// COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY
+// OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES
+// THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE
+// OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED
+// CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT
+// THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY
+// SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL
+// PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER
+// THIS DISCLAIMER.
+//
+// Use at your own risk!
+// ==========================================================
+
+#ifndef CACHEFILE_H
+#define CACHEFILE_H
+
+// ----------------------------------------------------------
+
+#include "FreeImage.h"
+#include "Utilities.h"
+
+// ----------------------------------------------------------
+
+static const int CACHE_SIZE = 32;
+static const int BLOCK_SIZE = (64 * 1024) - 8;
+
+// ----------------------------------------------------------
+
+#ifdef _WIN32
+#pragma pack(push, 1)
+#else
+#pragma pack(1)
+#endif // _WIN32
+
+struct Block {
+     unsigned nr;
+     unsigned next;
+     BYTE *data;
+};
+
+#ifdef _WIN32
+#pragma pack(pop)
+#else
+#pragma pack()
+#endif // _WIN32
+
+// ----------------------------------------------------------
+
+class CacheFile {
+	typedef std::list<Block *> PageCache;
+	typedef std::list<Block *>::iterator PageCacheIt;
+	typedef std::map<int, PageCacheIt> PageMap;
+	typedef std::map<int, PageCacheIt>::iterator PageMapIt;
+
+public :
+	CacheFile(const std::string filename, BOOL keep_in_memory);
+	~CacheFile();
+
+	BOOL open();
+	void close();
+	BOOL readFile(BYTE *data, int nr, int size);
+	int writeFile(BYTE *data, int size);
+	void deleteFile(int nr);
+
+private :
+	void cleanupMemCache();
+	int allocateBlock();
+	Block *lockBlock(int nr);
+	BOOL unlockBlock(int nr);
+	BOOL deleteBlock(int nr);
+
+private :
+	FILE *m_file;
+	std::string m_filename;
+	std::list<int> m_free_pages;
+	PageCache m_page_cache_mem;
+	PageCache m_page_cache_disk;
+	PageMap m_page_map;
+	int m_page_count;
+	Block *m_current_block;
+	BOOL m_keep_in_memory;
+};
+
+#endif // CACHEFILE_H