inplace_pack.cpp

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#include "joedb/ui/inplace_pack.h"
#include "joedb/ui/dump.h"
#include "joedb/journal/File.h"
#include "joedb/journal/Writable_Journal.h"
 
#include <cstdio>
 
namespace joedb
{
 void inplace_pack(const std::string &file_name)
 {
  const std::string packed = file_name + ".packed";
 
  {
   File input_file(file_name, Open_Mode::read_existing);
   File output_file(packed, Open_Mode::create_new);
   Readonly_Journal input_journal(input_file);
   Writable_Journal output_journal(output_file);
   pack(input_journal, output_journal);
  }
 
  const std::string unpacked = file_name + ".unpacked";
 
  if
  (
   std::rename(file_name.c_str(), unpacked.c_str()) ||
   std::rename(packed.c_str(), file_name.c_str())
  )
  {
   throw Exception("error moving files");
  }
 }
}