#!/usr/bin/env python

"""
Copyright (c) 2006-2026 sqlmap developers (https://sqlmap.org)
See the file 'LICENSE' for copying permission
"""

from lib.core.convert import getOrds
from plugins.generic.syntax import Syntax as GenericSyntax

class Syntax(GenericSyntax):
    @staticmethod
    def escape(expression, quote=True):
        """
        >>> Syntax.escape("SELECT 'abcdefgh' FROM foobar") == "SELECT CHR(97)||CHR(98)||CHR(99)||CHR(100)||CHR(101)||CHR(102)||CHR(103)||CHR(104) FROM foobar"
        True
        >>> Syntax.escape(u"SELECT 'abcd\xebfgh' FROM foobar") == "SELECT CHR(97)||CHR(98)||CHR(99)||CHR(100)||NCHR(235)||CHR(102)||CHR(103)||CHR(104) FROM foobar"
        True
        >>> Syntax.escape("SELECT 'a''b' FROM DUAL") == "SELECT CHR(97)||CHR(39)||CHR(98) FROM DUAL"
        True
        """

        def escaper(value):
            return "||".join("%s(%d)" % ("CHR" if _ < 128 else "NCHR", _) for _ in getOrds(value))

        return Syntax._escape(expression, quote, escaper)
