Intermediate changes

1 files changed, 62 insertions, 0 deletions

diff --git a/contrib/python/marisa-trie/marisa/grimoire/trie/header.h b/contrib/python/marisa-trie/marisa/grimoire/trie/header.h
new file mode 100644
index 0000000000..04839f67e1
--- /dev/null
+++ b/contrib/python/marisa-trie/marisa/grimoire/trie/header.h
@@ -0,0 +1,62 @@
+#pragma once
+#ifndef MARISA_GRIMOIRE_TRIE_HEADER_H_
+#define MARISA_GRIMOIRE_TRIE_HEADER_H_
+
+#include "../io.h"
+
+namespace marisa {
+namespace grimoire {
+namespace trie {
+
+class Header {
+ public:
+  enum {
+    HEADER_SIZE = 16
+  };
+
+  Header() {}
+
+  void map(Mapper &mapper) {
+    const char *ptr;
+    mapper.map(&ptr, HEADER_SIZE);
+    MARISA_THROW_IF(!test_header(ptr), MARISA_FORMAT_ERROR);
+  }
+  void read(Reader &reader) {
+    char buf[HEADER_SIZE];
+    reader.read(buf, HEADER_SIZE);
+    MARISA_THROW_IF(!test_header(buf), MARISA_FORMAT_ERROR);
+  }
+  void write(Writer &writer) const {
+    writer.write(get_header(), HEADER_SIZE);
+  }
+
+  std::size_t io_size() const {
+    return HEADER_SIZE;
+  }
+
+ private:
+
+  static const char *get_header() {
+    static const char buf[HEADER_SIZE] = "We love Marisa.";
+    return buf;
+  }
+
+  static bool test_header(const char *ptr) {
+    for (std::size_t i = 0; i < HEADER_SIZE; ++i) {
+      if (ptr[i] != get_header()[i]) {
+        return false;
+      }
+    }
+    return true;
+  }
+
+  // Disallows copy and assignment.
+  Header(const Header &);
+  Header &operator=(const Header &);
+};
+
+}  // namespace trie
+}  // namespace marisa
+}  // namespace grimoire
+
+#endif  // MARISA_GRIMOIRE_TRIE_HEADER_H_