AdvaImg plugin folder renaming

git-svn-id: http://svn.miranda-ng.org/main/trunk@2801 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c

1 files changed, 271 insertions, 0 deletions

diff --git a/plugins/AdvaImg/src/FreeImage/CacheFile.cpp b/plugins/AdvaImg/src/FreeImage/CacheFile.cpp
new file mode 100644
index 0000000000..309faf8faf
--- /dev/null
+++ b/plugins/AdvaImg/src/FreeImage/CacheFile.cpp
@@ -0,0 +1,271 @@
+// ==========================================================
+// Multi-Page functions
+//
+// Design and implementation by
+// - Floris van den Berg (flvdberg@wxs.nl)
+// - checkered (checkered@users.sourceforge.net)
+//
+// 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"
+
+// ----------------------------------------------------------
+
+CacheFile::CacheFile(const std::string filename, BOOL keep_in_memory) :
+m_file(NULL),
+m_filename(filename),
+m_free_pages(),
+m_page_cache_mem(),
+m_page_cache_disk(),
+m_page_map(),
+m_page_count(0),
+m_current_block(NULL),
+m_keep_in_memory(keep_in_memory) {
+}
+
+CacheFile::~CacheFile() {
+}
+
+BOOL
+CacheFile::open() {
+	if ((!m_filename.empty()) && (!m_keep_in_memory)) {
+		m_file = fopen(m_filename.c_str(), "w+b");
+		return (m_file != NULL);
+	}
+
+	return (m_keep_in_memory == TRUE);
+}
+
+void
+CacheFile::close() {
+	// dispose the cache entries
+
+	while (!m_page_cache_disk.empty()) {
+		Block *block = *m_page_cache_disk.begin();
+		m_page_cache_disk.pop_front();
+		delete [] block->data;
+		delete block;
+	}
+	while (!m_page_cache_mem.empty()) { 
+		Block *block = *m_page_cache_mem.begin(); 
+		m_page_cache_mem.pop_front(); 
+		delete [] block->data; 
+		delete block; 
+	} 
+
+	if (m_file) {
+		// close the file
+
+		fclose(m_file);
+
+		// delete the file
+
+		remove(m_filename.c_str());
+	}
+}
+
+void
+CacheFile::cleanupMemCache() {
+	if (!m_keep_in_memory) {
+		if (m_page_cache_mem.size() > CACHE_SIZE) {
+			// flush the least used block to file
+
+			Block *old_block = m_page_cache_mem.back();
+			fseek(m_file, old_block->nr * BLOCK_SIZE, SEEK_SET);
+			fwrite(old_block->data, BLOCK_SIZE, 1, m_file);
+
+			// remove the data
+
+			delete [] old_block->data;
+			old_block->data = NULL;
+
+			// move the block to another list
+
+			m_page_cache_disk.splice(m_page_cache_disk.begin(), m_page_cache_mem, --m_page_cache_mem.end());
+			m_page_map[old_block->nr] = m_page_cache_disk.begin();
+		}
+	}
+}
+
+int
+CacheFile::allocateBlock() {
+	Block *block = new Block;
+	block->data = new BYTE[BLOCK_SIZE];
+	block->next = 0;
+
+	if (!m_free_pages.empty()) {
+		block->nr = *m_free_pages.begin();
+		m_free_pages.pop_front();
+	} else {
+		block->nr = m_page_count++;
+	}
+
+	m_page_cache_mem.push_front(block);
+	m_page_map[block->nr] = m_page_cache_mem.begin();
+
+	cleanupMemCache();
+
+	return block->nr;
+}
+
+Block *
+CacheFile::lockBlock(int nr) {
+	if (m_current_block == NULL) {
+		PageMapIt it = m_page_map.find(nr);
+
+		if (it != m_page_map.end()) {
+			m_current_block = *(it->second);
+
+			// the block is swapped out to disc. load it back
+			// and remove the block from the cache. it might get cached
+			// again as soon as the memory buffer fills up
+
+			if (m_current_block->data == NULL) {
+				m_current_block->data = new BYTE[BLOCK_SIZE];
+
+				fseek(m_file, m_current_block->nr * BLOCK_SIZE, SEEK_SET);
+				fread(m_current_block->data, BLOCK_SIZE, 1, m_file);
+
+				m_page_cache_mem.splice(m_page_cache_mem.begin(), m_page_cache_disk, it->second);
+				m_page_map[nr] = m_page_cache_mem.begin();
+			}
+
+			// if the memory cache size is too large, swap an item to disc
+
+			cleanupMemCache();
+
+			// return the current block
+
+			return m_current_block;
+		}
+	}
+
+	return NULL;
+}
+
+BOOL
+CacheFile::unlockBlock(int nr) {
+	if (m_current_block) {
+		m_current_block = NULL;
+
+		return TRUE;
+	}
+
+	return FALSE;
+}
+
+BOOL
+CacheFile::deleteBlock(int nr) {
+	if (!m_current_block) {
+		PageMapIt it = m_page_map.find(nr);
+
+		// remove block from cache
+
+		if (it != m_page_map.end())
+			m_page_map.erase(nr);
+
+		// add block to free page list
+
+		m_free_pages.push_back(nr);
+
+		return TRUE;
+	}
+
+	return FALSE;
+}
+
+BOOL
+CacheFile::readFile(BYTE *data, int nr, int size) {
+	if ((data) && (size > 0)) {
+		int s = 0;
+		int block_nr = nr;
+
+		do {
+			int copy_nr = block_nr;
+
+			Block *block = lockBlock(copy_nr);
+
+			block_nr = block->next;
+
+			memcpy(data + s, block->data, (s + BLOCK_SIZE > size) ? size - s : BLOCK_SIZE);
+
+			unlockBlock(copy_nr);
+
+			s += BLOCK_SIZE;
+		} while (block_nr != 0);
+
+		return TRUE;
+	}
+
+	return FALSE;
+}
+
+int
+CacheFile::writeFile(BYTE *data, int size) {
+	if ((data) && (size > 0)) {
+		int nr_blocks_required = 1 + (size / BLOCK_SIZE);
+		int count = 0;
+		int s = 0;
+		int stored_alloc;
+		int alloc;
+		
+		stored_alloc = alloc = allocateBlock();
+
+		do {
+			int copy_alloc = alloc;
+
+			Block *block = lockBlock(copy_alloc);
+
+			block->next = 0;
+
+			memcpy(block->data, data + s, (s + BLOCK_SIZE > size) ? size - s : BLOCK_SIZE);
+
+			if (count + 1 < nr_blocks_required)
+				alloc = block->next = allocateBlock();
+
+			unlockBlock(copy_alloc);
+
+			s += BLOCK_SIZE;			
+		} while (++count < nr_blocks_required);
+
+		return stored_alloc;
+	}
+
+	return 0;
+}
+
+void
+CacheFile::deleteFile(int nr) {
+	do {
+		Block *block = lockBlock(nr);
+
+		if (block == NULL)
+			break;
+
+		int next = block->next;
+
+		unlockBlock(nr);
+
+		deleteBlock(nr);
+
+		nr = next;
+	} while (nr != 0);
+}
+