diff options
Diffstat (limited to 'plugins/freeimage/Source/FreeImage/CacheFile.cpp')
| -rw-r--r-- | plugins/freeimage/Source/FreeImage/CacheFile.cpp | 271 |
1 files changed, 0 insertions, 271 deletions
diff --git a/plugins/freeimage/Source/FreeImage/CacheFile.cpp b/plugins/freeimage/Source/FreeImage/CacheFile.cpp deleted file mode 100644 index fc1ba0d798..0000000000 --- a/plugins/freeimage/Source/FreeImage/CacheFile.cpp +++ /dev/null @@ -1,271 +0,0 @@ -// ==========================================================
-// 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);
-}
-
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