parser_bits.h

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#ifndef PARSER_BITS_CLASS
#define PARSER_BITS_CLASS
 
/*****************************************************************************\
*                                                                             *
*  Name   : parser_bits                                                       *
*  Author : Chris Koeritz                                                     *
*                                                                             *
*******************************************************************************
* Copyright (c) 2000-$now By Author.  This program is free software; you can  *
* redistribute it and/or modify it under the terms of the GNU General Public  *
* License as published by the Free Software Foundation; either version 2 of   *
* the License or (at your option) any later version.  This is online at:      *
*     http://www.fsf.org/copyleft/gpl.html                                    *
* Please send any updates to: fred@gruntose.com                               *
\*****************************************************************************/
 
#include <basis/astring.h>
 
namespace textual {
 
 
class parser_bits
{
public:
 
  enum line_ending {
    LF_AT_END = -15,  
    CRLF_AT_END,  
    NO_ENDING  
  };
 
  static const char *eol_to_chars(line_ending ending);
 
  static line_ending platform_eol();
 
  static const char *platform_eol_to_chars();
 
  static void translate_CR_for_platform(basis::astring &to_translate);
 
  static basis::astring substitute_env_vars(const basis::astring &text,
          bool leave_unknown = true);
 
  static bool is_printable_ascii(char to_check);
 
  static bool white_space_no_cr(char to_check);
 
  static bool is_eol(char to_check);
 
  static bool white_space(char to_check);
 
  static bool is_alphanumeric(char look_at);
 
  static bool is_alphanumeric(const char *look_at, int len);
  static bool is_alphanumeric(const basis::astring &look_at, int len);
 
  static bool is_alpha(char look_at);
 
  static bool is_alpha(const char *look_at, int len);
  static bool is_alpha(const basis::astring &look_at, int len);
 
  static bool is_numeric(char look_at);
 
  static bool is_numeric(const char *look_at, int len);
  static bool is_numeric(const basis::astring &look_at, int len);
 
  static bool is_hexadecimal(char look_at);
 
  static bool is_hexadecimal(const char *look_at, int len);
  static bool is_hexadecimal(const basis::astring &look_at, int len);
 
  static bool is_identifier(char look_at);
 
  static bool is_identifier(const char *look_at, int len);
 
  static bool is_identifier(const basis::astring &look_at, int len);
};
 
} //namespace.
 
#endif