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// ==========================================================
// Multi-Page functions
//
// Design and implementation by
// - Floris van den Berg (flvdberg@wxs.nl)
// - Laurent Rocher (rocherl@club-internet.fr)
// - Steve Johnson (steve@parisgroup.net)
// - Petr Pytelka (pyta@lightcomp.com)
// - Hervé Drolon (drolon@infonie.fr)
// - Vadim Alexandrov (vadimalexandrov@users.sourceforge.net
// - Martin Dyring-Andersen (mda@spamfighter.com)
// - Volodymyr Goncharov (volodymyr.goncharov@gmail.com)
//
// 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!
// ==========================================================

#ifdef _MSC_VER 
#pragma warning (disable : 4786) // identifier was truncated to 'number' characters
#endif

#include "CacheFile.h"
#include "FreeImageIO.h"
#include "Plugin.h"
#include "Utilities.h"
#include "FreeImage.h"

// ----------------------------------------------------------

enum BlockType { BLOCK_CONTINUEUS, BLOCK_REFERENCE };

// ----------------------------------------------------------

struct BlockTypeS {
	BlockType m_type;

	BlockTypeS(BlockType type) : m_type(type) {
	}
	virtual ~BlockTypeS() {}
};

struct BlockContinueus : public BlockTypeS {
	int       m_start;
	int       m_end;

	BlockContinueus(int s, int e) : BlockTypeS(BLOCK_CONTINUEUS),
	m_start(s),
	m_end(e) {
	}	
};

struct BlockReference : public BlockTypeS {
	int       m_reference;
	int       m_size;

	BlockReference(int r, int size) : BlockTypeS(BLOCK_REFERENCE),
	m_reference(r),
	m_size(size) {
	}
};

// ----------------------------------------------------------

typedef std::list<BlockTypeS *> BlockList;
typedef std::list<BlockTypeS *>::iterator BlockListIterator;

// ----------------------------------------------------------

FI_STRUCT (MULTIBITMAPHEADER) {
	PluginNode *node;
	FREE_IMAGE_FORMAT fif;
	FreeImageIO *io;
	fi_handle handle;
	CacheFile *m_cachefile;
	std::map<FIBITMAP *, int> locked_pages;
	BOOL changed;
	int page_count;
	BlockList m_blocks;
	char *m_filename;
	BOOL read_only;
	FREE_IMAGE_FORMAT cache_fif;
	int load_flags;
};

// =====================================================================
// Helper functions
// =====================================================================

inline void
ReplaceExtension(std::string& dst_filename, const std::string& src_filename, const std::string& dst_extension) {
	size_t lastDot = src_filename.find_last_of('.');
	if (lastDot == std::string::npos) {
		dst_filename = src_filename;
		dst_filename += ".";
		dst_filename += dst_extension;
	}
	else {
		dst_filename = src_filename.substr(0, lastDot + 1);
		dst_filename += dst_extension;
	}
}

// =====================================================================
// Internal Multipage functions
// =====================================================================

inline MULTIBITMAPHEADER *
FreeImage_GetMultiBitmapHeader(FIMULTIBITMAP *bitmap) {
	return (MULTIBITMAPHEADER *)bitmap->data;
}

static BlockListIterator DLL_CALLCONV