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/*
* Copyright 2011, Blender Foundation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <stdio.h>
#include "util_cache.h"
#include "util_debug.h"
#include "util_foreach.h"
#include "util_map.h"
#include "util_md5.h"
#include "util_path.h"
#include "util_types.h"
#include <boost/filesystem.hpp>
#include <boost/algorithm/string.hpp>
CCL_NAMESPACE_BEGIN
/* CacheData */
CacheData::CacheData(const string& name_)
{
name = name_;
f = NULL;
have_filename = false;
}
CacheData::~CacheData()
{
if(f)
fclose(f);
}
const string& CacheData::get_filename()
{
if(!have_filename) {
MD5Hash hash;
foreach(const CacheBuffer& buffer, buffers)
if(buffer.size)
hash.append((uint8_t*)buffer.data, buffer.size);
filename = name + "_" + hash.get_hex();
have_filename = true;
}
return filename;
}
/* Cache */
Cache Cache::global;
string Cache::data_filename(CacheData& key)
{
return path_user_get(path_join("cache", key.get_filename()));
}
void Cache::insert(CacheData& key, CacheData& value)
{
string filename = data_filename(key);
path_create_directories(filename);
FILE *f = fopen(filename.c_str(), "wb");
if(!f) {
fprintf(stderr, "Failed to open file %s for writing.\n", filename.c_str());
return;
}
foreach(CacheBuffer& buffer, value.buffers) {
if(!fwrite(&buffer.size, sizeof(buffer.size), 1, f))
fprintf(stderr, "Failed to write to file %s.\n", filename.c_str());
if(buffer.size)
if(!fwrite(buffer.data, buffer.size, 1, f))
fprintf(stderr, "Failed to write to file %s.\n", filename.c_str());
}
fclose(f);
}
bool Cache::lookup(CacheData& key, CacheData& value)
{
string filename = data_filename(key);
FILE *f = fopen(filename.c_str(), "rb");
if(!f)
return false;
value.name = key.name;
value.f = f;
return true;
}
void Cache::clear_except(const string& name, const set<string>& except)
{
string dir = path_user_get("cache");
if(boost::filesystem::exists(dir)) {
boost::filesystem::directory_iterator it(dir), it_end;
for(; it != it_end; it++) {
string filename = it->path().filename().string();
if(boost::starts_with(filename, name))
if(except.find(filename) == except.end())
boost::filesystem::remove(it->path());
}
}
}
CCL_NAMESPACE_END
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