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/*
* Copyright 2011-2013 Blender Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License
*/
#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/version.hpp>
#if (BOOST_VERSION < 104400)
# define BOOST_FILESYSTEM_VERSION 2
#endif
#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++) {
#if (BOOST_FILESYSTEM_VERSION == 2)
string filename = it->path().filename();
#else
string filename = it->path().filename().string();
#endif
if(boost::starts_with(filename, name))
if(except.find(filename) == except.end())
boost::filesystem::remove(it->path());
}
}
}
CCL_NAMESPACE_END
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