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// file : odb/sql-lexer.hxx
// author : Boris Kolpackov <boris@codesynthesis.com>
// copyright : Copyright (c) 2009-2010 Code Synthesis Tools CC
// license : GNU GPL v3; 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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