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/* Copyright (c) 2015 Stanislaw Halik
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*/
#pragma once
#include "plugin-api.hpp"
#include "options.hpp"
#include <QWidget>
#include <QDebug>
#include <QString>
#include <QLibrary>
#include <QFrame>
#include <QList>
#include <cstdio>
#include <cinttypes>
#include <iostream>
#include <QCoreApplication>
#include <QFile>
#include <QDir>
#include <QList>
#include <QStringList>
#ifndef _WIN32
# include <dlfcn.h>
#endif
#if defined(__APPLE__)
# define OPENTRACK_SONAME "dylib"
#elif defined(_WIN32)
# define OPENTRACK_SONAME "dll"
#else
# define OPENTRACK_SONAME "so"
#endif
#include <iostream>
#ifdef _MSC_VER
# define OPENTRACK_LIB_PREFIX ""
#else
# define OPENTRACK_LIB_PREFIX "lib"
#endif
extern "C" typedef void* (*OPENTRACK_CTOR_FUNPTR)(void);
extern "C" typedef Metadata* (*OPENTRACK_METADATA_FUNPTR)(void);
struct dylib {
enum Type { Filter, Tracker, Protocol };
dylib(const QString& filename, Type t) :
type(t),
filename(filename),
Dialog(nullptr),
Constructor(nullptr),
Meta(nullptr),
handle(nullptr)
{
// otherwise dlopen opens the calling executable
if (filename.size() == 0)
return;
#if defined(_WIN32)
QString fullPath = QCoreApplication::applicationDirPath() + "/" + this->filename;
handle = new QLibrary(fullPath);
struct _foo {
static bool die(QLibrary*& l, bool failp)
{
if (failp)
{
qDebug() << "failed" << l->errorString();
delete l;
l = nullptr;
}
return failp;
}
};
if (_foo::die(handle, !handle->load()))
return;
Dialog = (OPENTRACK_CTOR_FUNPTR) handle->resolve("GetDialog");
if (_foo::die(handle, !Dialog))
return;
Constructor = (OPENTRACK_CTOR_FUNPTR) handle->resolve("GetConstructor");
if (_foo::die(handle, !Constructor))
return;
Meta = (OPENTRACK_METADATA_FUNPTR) handle->resolve("GetMetadata");
if (_foo::die(handle, !Meta))
return;
#else
QByteArray latin1 = QFile::encodeName(filename);
handle = dlopen(latin1.constData(),
# if defined(__APPLE__)
RTLD_LOCAL|RTLD_FIRST|RTLD_NOW
# else
RTLD_LOCAL|RTLD_NOW // XXX RTLD_DEEPBIND on Linux?
# endif
);
struct _foo {
static bool err(void*& handle)
{
const char* err = dlerror();
if (err)
{
fprintf(stderr, "Error, ignoring: %s\n", err);
fflush(stderr);
if (handle)
dlclose(handle);
handle = nullptr;
return true;
}
return false;
}
};
if (handle)
{
if (_foo::err(handle))
return;
Dialog = (OPENTRACK_CTOR_FUNPTR) dlsym(handle, "GetDialog");
if (_foo::err(handle))
return;
Constructor = (OPENTRACK_CTOR_FUNPTR) dlsym(handle, "GetConstructor");
if (_foo::err(handle))
return;
Meta = (OPENTRACK_METADATA_FUNPTR) dlsym(handle, "GetMetadata");
if (_foo::err(handle))
return;
} else {
(void) _foo::err(handle);
return;
}
#endif
auto m = mem<Metadata>(Meta());
icon = m->icon();
name = m->name();
}
~dylib()
{
#if defined(_WIN32)
if (handle)
delete handle;
#else
if (handle)
(void) dlclose(handle);
#endif
}
static QList<mem<dylib>> enum_libraries()
{
const char* filters_n[] = { "opentrack-filter-*.",
"opentrack-tracker-*.",
"opentrack-proto-*."
};
const Type filters_t[] = { Filter, Tracker, Protocol };
QDir settingsDir( QCoreApplication::applicationDirPath() );
QList<mem<dylib>> ret;
for (int i = 0; i < 3; i++)
{
QString filter = filters_n[i];
auto t = filters_t[i];
QStringList filenames = settingsDir.entryList(QStringList { OPENTRACK_LIB_PREFIX + filter + OPENTRACK_SONAME },
QDir::Files,
QDir::Name);
for (int i = 0; i < filenames.size(); i++) {
QIcon icon;
QString longName;
QString str = filenames.at(i);
auto lib = std::make_shared<dylib>(str, t);
qDebug() << "Loading" << str;
std::cout.flush();
if (!get_metadata(lib, longName, icon))
continue;
using d = const mem<dylib>&;
if (std::any_of(ret.cbegin(),
ret.cend(),
[&](d a) {return a->type == lib->type && a->name == lib->name;}))
{
qDebug() << "Duplicate lib" << lib->filename;
continue;
}
ret.push_back(lib);
}
}
return ret;
}
Type type;
QString filename;
QIcon icon;
QString name;
OPENTRACK_CTOR_FUNPTR Dialog;
OPENTRACK_CTOR_FUNPTR Constructor;
OPENTRACK_METADATA_FUNPTR Meta;
private:
#if defined(_WIN32)
QLibrary* handle;
#else
void* handle;
#endif
static bool get_metadata(mem<dylib> lib, QString& name, QIcon& icon)
{
Metadata* meta;
if (!lib->Meta || ((meta = lib->Meta()), !meta))
return false;
name = meta->name();
icon = meta->icon();
delete meta;
return true;
}
};
struct Modules {
Modules() :
module_list(dylib::enum_libraries()),
filter_modules(filter(dylib::Filter)),
tracker_modules(filter(dylib::Tracker)),
protocol_modules(filter(dylib::Protocol))
{}
QList<mem<dylib>>& filters() { return filter_modules; }
QList<mem<dylib>>& trackers() { return tracker_modules; }
QList<mem<dylib>>& protocols() { return protocol_modules; }
private:
QList<mem<dylib>> module_list;
QList<mem<dylib>> filter_modules;
QList<mem<dylib>> tracker_modules;
QList<mem<dylib>> protocol_modules;
QList<mem<dylib>> filter(dylib::Type t)
{
QList<mem<dylib>> ret;
for (auto x : module_list)
if (x->type == t)
ret.push_back(x);
return ret;
}
};
template<typename t>
mem<t> make_dylib_instance(mem<dylib> lib)
{
mem<t> ret;
if (lib != nullptr && lib->Constructor)
ret = mem<t>(reinterpret_cast<t*>(reinterpret_cast<OPENTRACK_CTOR_FUNPTR>(lib->Constructor)()));
return ret;
}
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