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#include "dictionary/file/dictionary_file.h"

#include <string>
#include <vector>

#include "base/logging.h"
#include "base/mmap.h"
#include "dictionary/file/codec_interface.h"
#include "dictionary/file/section.h"

namespace mozc {
namespace dictionary {

DictionaryFile::DictionaryFile() {}

DictionaryFile::~DictionaryFile() {}

bool DictionaryFile::OpenFromFile(const string &file) {
  mapping_.reset(new Mmap());
  CHECK(mapping_->Open(file.c_str()));
  return OpenFromImage(mapping_->begin(), mapping_->size());
}

bool DictionaryFile::OpenFromImage(const char *image, int length) {
  sections_.clear();
  const bool result =
      DictionaryFileCodecFactory::GetCodec()->ReadSections(
          image, length, &sections_);
  return result;
}

const char *DictionaryFile::GetSection(const string &section_name,
                                       int *len) const {
  DCHECK(len);
  const string name =
      DictionaryFileCodecFactory::GetCodec()->GetSectionName(section_name);
  for (size_t i = 0; i < sections_.size(); ++i) {
    if (sections_[i].name == name) {
      *len = sections_[i].len;
      return sections_[i].ptr;
    }
  }
  return nullptr;
}

}  // namespace dictionary
}  // namespace mozc