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#include "ModuleCache.h"
#include "module.h"
#include "printutils.h"
#include "openscad.h"
#include "boosty.h"
#include <boost/format.hpp>
#include <boost/filesystem.hpp>
#include <boost/foreach.hpp>
#include <stdio.h>
#include <fstream>
#include <sstream>
#include <time.h>
#include <sys/stat.h>
/*!
FIXME: Implement an LRU scheme to avoid having an ever-growing module cache
*/
ModuleCache *ModuleCache::inst = NULL;
static bool is_modified(const std::string &filename, const time_t &mtime)
{
struct stat st;
memset(&st, 0, sizeof(struct stat));
stat(filename.c_str(), &st);
return (st.st_mtime > mtime);
}
Module *ModuleCache::evaluate(const std::string &filename)
{
Module *lib_mod = NULL;
// Create cache ID
struct stat st;
memset(&st, 0, sizeof(struct stat));
stat(filename.c_str(), &st);
std::string cache_id = str(boost::format("%x.%x") % st.st_mtime % st.st_size);
// Lookup in cache
if (this->entries.find(filename) != this->entries.end() &&
this->entries[filename].cache_id == cache_id) {
#ifdef DEBUG
// Causes too much debug output
// PRINTB("Using cached library: %s (%s)", filename % cache_id);
#endif
lib_mod = &(*this->entries[filename].module);
BOOST_FOREACH(const Module::IncludeContainer::value_type &item, lib_mod->includes) {
if (is_modified(item.first, item.second)) {
lib_mod = NULL;
break;
}
}
}
// If cache lookup failed (non-existing or old timestamp), compile module
if (!lib_mod) {
#ifdef DEBUG
if (this->entries.find(filename) != this->entries.end()) {
PRINTB("Recompiling cached library: %s (%s)", filename % cache_id);
}
else {
PRINTB("Compiling library '%s'.", filename);
}
#endif
std::ifstream ifs(filename.c_str());
if (!ifs.is_open()) {
PRINTB("WARNING: Can't open library file '%s'\n", filename);
return NULL;
}
std::string text((std::istreambuf_iterator<char>(ifs)), std::istreambuf_iterator<char>());
print_messages_push();
cache_entry e = { NULL, cache_id };
if (this->entries.find(filename) != this->entries.end()) {
delete this->entries[filename].module;
}
this->entries[filename] = e;
std::string pathname = boosty::stringy(fs::path(filename).parent_path());
lib_mod = dynamic_cast<Module*>(parse(text.c_str(), pathname.c_str(), 0));
if (lib_mod) {
this->entries[filename].module = lib_mod;
} else {
this->entries.erase(filename);
}
print_messages_pop();
}
if (lib_mod) lib_mod->handleDependencies();
return lib_mod;
}
void ModuleCache::clear()
{
this->entries.clear();
}
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