From cea6fb57ac8c9a893c0f404fef6c1469f0b6222b Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 22 Jul 2010 14:33:21 +0200
Subject: Next chunk of functionality

Add SQL language lexer. Implement MySQL type declaration parser.
Create sub-directories for databases, currently mysql and tracer.
Create MySQL-specific context.
---
 odb/sql-lexer.hxx | 128 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 128 insertions(+)
 create mode 100644 odb/sql-lexer.hxx

(limited to 'odb/sql-lexer.hxx')

diff --git a/odb/sql-lexer.hxx b/odb/sql-lexer.hxx
new file mode 100644
index 0000000..f650dc4
--- /dev/null
+++ b/odb/sql-lexer.hxx
@@ -0,0 +1,128 @@
+// file      : odb/sql-lexer.hxx
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : Copyright (c) 2009-2010 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef ODB_SQL_LEXER_HXX
+#define ODB_SQL_LEXER_HXX
+
+#include <string>
+#include <locale>
+#include <cstddef> // std::size_t
+#include <sstream>
+
+#include <odb/sql-token.hxx>
+
+class sql_lexer
+{
+public:
+  sql_lexer (std::string const& sql);
+
+  struct invalid_input
+  {
+    invalid_input (std::size_t l, std::size_t c, std::string const& m)
+        : line (l), column (c), message (m)
+    {
+    }
+
+    std::size_t line;
+    std::size_t column;
+    std::string const message;
+  };
+
+  sql_token
+  next ();
+
+protected:
+  class xchar
+  {
+  public:
+    typedef std::char_traits<char> traits_type;
+    typedef traits_type::int_type int_type;
+    typedef traits_type::char_type char_type;
+
+    xchar (int_type v, std::size_t l, std::size_t c);
+
+    operator char_type () const;
+
+    int_type
+    value () const;
+
+    std::size_t
+    line () const;
+
+    std::size_t
+    column () const;
+
+  private:
+    int_type v_;
+    std::size_t l_;
+    std::size_t c_;
+  };
+
+  xchar
+  peek ();
+
+  xchar
+  get ();
+
+  void
+  unget (xchar);
+
+protected:
+  void
+  skip_spaces ();
+
+  sql_token
+  identifier (xchar);
+
+  sql_token
+  int_literal (xchar,
+               bool neg = false,
+               std::size_t ml = 0,
+               std::size_t mc = 0);
+
+  sql_token
+  string_literal (xchar);
+
+protected:
+  bool
+  is_alpha (char c) const;
+
+  bool
+  is_oct_digit (char c) const;
+
+  bool
+  is_dec_digit (char c) const;
+
+  bool
+  is_hex_digit (char c) const;
+
+  bool
+  is_alnum (char c) const;
+
+  bool
+  is_space (char c) const;
+
+  bool
+  is_eos (xchar const& c) const;
+
+  char
+  to_upper (char c) const;
+
+private:
+  std::locale loc_;
+  std::istringstream is_;
+  std::size_t l_;
+  std::size_t c_;
+
+  bool eos_;
+  bool include_;
+
+  xchar buf_;
+  bool unget_;
+};
+
+#include <odb/sql-lexer.ixx>
+
+#endif // ODB_SQL_LEXER_HXX
-- 
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