#include <DwarfInterpret.hpp>

#include <fstream>

#include <fileno.hpp>
#include <dwarfpp/lib.hpp>
#include <dwarfpp/regs.hpp>
#include <dwarfpp/frame.hpp>
#include <dwarfpp/attr.hpp>
#include <dwarfpp/frame.hpp>
#include <dwarfpp/root.hpp>
#include <gelf.h>

DwarfInterpret::DwarfInterpret(const std::string& elf_path)
    : root_die(fileno(std::ifstream(elf_path)))
{
	//std::ifstream file_in(elf_path);
	//root_die = dwarf::core::root_die(fileno(file_in));
    // FIXME this ^ deserves some checks. But this looks tedious.

	GElf_Ehdr ehdr;
	GElf_Ehdr *ret = gelf_getehdr(root_die.get_elf(), &ehdr);
	assert(ret != 0);
	elf_machine = ehdr.e_machine;
}

DwarfInterpret& DwarfInterpret::acquire() {
    if(DwarfInterpret::instance == nullptr)
        throw NotInstanciated();
    return *(DwarfInterpret::instance);
}

DwarfInterpret& DwarfInterpret::instanciate(const std::string& elf_path) {
    if(DwarfInterpret::instance != nullptr)
        throw AlreadyInstanciated();
    DwarfInterpret::instance = std::unique_ptr<DwarfInterpret>(
            new DwarfInterpret(elf_path));
    return *(DwarfInterpret::instance);
}