/*============================================================================= | |
Boost.Wave: A Standard compliant C++ preprocessor library | |
Grammar for universal character validation (see C++ standard: Annex E) | |
http://www.boost.org/ | |
Copyright (c) 2001-2011 Hartmut Kaiser. Distributed under the Boost | |
Software License, Version 1.0. (See accompanying file | |
LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
=============================================================================*/ | |
#if !defined(VALIDATE_UNIVERSAL_CHAR_HPP_55F1B811_CD76_4C72_8344_CBC69CF3B339_INCLUDED) | |
#define VALIDATE_UNIVERSAL_CHAR_HPP_55F1B811_CD76_4C72_8344_CBC69CF3B339_INCLUDED | |
#include <boost/assert.hpp> | |
#include <boost/wave/wave_config.hpp> | |
#include <boost/wave/util/file_position.hpp> | |
#include <boost/wave/cpplexer/cpplexer_exceptions.hpp> | |
// this must occur after all of the includes and before any code appears | |
#ifdef BOOST_HAS_ABI_HEADERS | |
#include BOOST_ABI_PREFIX | |
#endif | |
/////////////////////////////////////////////////////////////////////////////// | |
namespace boost { | |
namespace wave { | |
namespace cpplexer { | |
namespace impl { | |
enum universal_char_type { | |
universal_char_type_valid = 0, | |
universal_char_type_invalid = 1, | |
universal_char_type_base_charset = 2, | |
universal_char_type_not_allowed_for_identifiers = 3 | |
}; | |
/////////////////////////////////////////////////////////////////////////// | |
// | |
// is_range is a helper function for the classification by brute force | |
// below | |
// | |
/////////////////////////////////////////////////////////////////////////// | |
inline bool | |
in_range(unsigned long ch, unsigned long l, unsigned long u) | |
{ | |
return (l <= ch && ch <= u); | |
} | |
/////////////////////////////////////////////////////////////////////////////// | |
// | |
// classify_universal_char | |
// | |
// This function classifies an universal character value into 4 subranges: | |
// universal_char_type_valid | |
// the universal character value is valid for identifiers | |
// universal_char_type_invalid | |
// the universal character value is not valid for its usage inside | |
// identifiers (see C++ Standard: 2.2.2 [lex.charset]) | |
// universal_char_type_base_charset | |
// the universal character value designates a character from the base | |
// character set | |
// universal_char_type_not_allowed_for_identifiers | |
// the universal character value is not allowed in an identifier | |
// | |
// Implementation note: | |
// This classification isn't implemented very effectively here. This | |
// function should be rewritten with some range run matching algorithm. | |
// | |
/////////////////////////////////////////////////////////////////////////////// | |
inline universal_char_type | |
classify_universal_char (unsigned long ch) | |
{ | |
// test for invalid characters | |
if (ch <= 0x0020 || in_range(ch, 0x007f, 0x009f)) | |
return universal_char_type_invalid; | |
// test for characters in the range of the base character set | |
if (in_range(ch, 0x0021, 0x005f) || in_range(ch, 0x0061, 0x007e)) | |
return universal_char_type_base_charset; | |
// test for additional valid character values (see C++ Standard: Annex E) | |
if (in_range(ch, 0x00c0, 0x00d6) || in_range(ch, 0x00d8, 0x00f6) || | |
in_range(ch, 0x00f8, 0x01f5) || in_range(ch, 0x01fa, 0x0217) || | |
in_range(ch, 0x0250, 0x02a8) || in_range(ch, 0x1e00, 0x1e9a) || | |
in_range(ch, 0x1ea0, 0x1ef9)) | |
{ | |
return universal_char_type_valid; // Latin | |
} | |
if (0x0384 == ch || in_range(ch, 0x0388, 0x038a) || | |
0x038c == ch || in_range(ch, 0x038e, 0x03a1) || | |
in_range(ch, 0x03a3, 0x03ce) || in_range(ch, 0x03d0, 0x03d6) || | |
0x03da == ch || 0x03dc == ch || 0x03de == ch || 0x03e0 == ch || | |
in_range(ch, 0x03e2, 0x03f3) || in_range(ch, 0x1f00, 0x1f15) || | |
in_range(ch, 0x1f18, 0x1f1d) || in_range(ch, 0x1f20, 0x1f45) || | |
in_range(ch, 0x1f48, 0x1f4d) || in_range(ch, 0x1f50, 0x1f57) || | |
0x1f59 == ch || 0x1f5b == ch || 0x1f5d == ch || | |
in_range(ch, 0x1f5f, 0x1f7d) || in_range(ch, 0x1f80, 0x1fb4) || | |
in_range(ch, 0x1fb6, 0x1fbc) || in_range(ch, 0x1fc2, 0x1fc4) || | |
in_range(ch, 0x1fc6, 0x1fcc) || in_range(ch, 0x1fd0, 0x1fd3) || | |
in_range(ch, 0x1fd6, 0x1fdb) || in_range(ch, 0x1fe0, 0x1fec) || | |
in_range(ch, 0x1ff2, 0x1ff4) || in_range(ch, 0x1ff6, 0x1ffc)) | |
{ | |
return universal_char_type_valid; // Greek | |
} | |
if (in_range(ch, 0x0401, 0x040d) || in_range(ch, 0x040f, 0x044f) || | |
in_range(ch, 0x0451, 0x045c) || in_range(ch, 0x045e, 0x0481) || | |
in_range(ch, 0x0490, 0x04c4) || in_range(ch, 0x04c7, 0x04c8) || | |
in_range(ch, 0x04cb, 0x04cc) || in_range(ch, 0x04d0, 0x04eb) || | |
in_range(ch, 0x04ee, 0x04f5) || in_range(ch, 0x04f8, 0x04f9)) | |
{ | |
return universal_char_type_valid; // Cyrillic | |
} | |
if (in_range(ch, 0x0531, 0x0556) || in_range(ch, 0x0561, 0x0587)) | |
return universal_char_type_valid; // Armenian | |
if (in_range(ch, 0x05d0, 0x05ea) || in_range(ch, 0x05f0, 0x05f4)) | |
return universal_char_type_valid; // Hebrew | |
if (in_range(ch, 0x0621, 0x063a) || in_range(ch, 0x0640, 0x0652) || | |
in_range(ch, 0x0670, 0x06b7) || in_range(ch, 0x06ba, 0x06be) || | |
in_range(ch, 0x06c0, 0x06ce) || in_range(ch, 0x06e5, 0x06e7)) | |
{ | |
return universal_char_type_valid; // Arabic | |
} | |
if (in_range(ch, 0x0905, 0x0939) || in_range(ch, 0x0958, 0x0962)) | |
return universal_char_type_valid; // Devanagari | |
if (in_range(ch, 0x0985, 0x098c) || in_range(ch, 0x098f, 0x0990) || | |
in_range(ch, 0x0993, 0x09a8) || in_range(ch, 0x09aa, 0x09b0) || | |
0x09b2 == ch || in_range(ch, 0x09b6, 0x09b9) || | |
in_range(ch, 0x09dc, 0x09dd) || in_range(ch, 0x09df, 0x09e1) || | |
in_range(ch, 0x09f0, 0x09f1)) | |
{ | |
return universal_char_type_valid; // Bengali | |
} | |
if (in_range(ch, 0x0a05, 0x0a0a) || in_range(ch, 0x0a0f, 0x0a10) || | |
in_range(ch, 0x0a13, 0x0a28) || in_range(ch, 0x0a2a, 0x0a30) || | |
in_range(ch, 0x0a32, 0x0a33) || in_range(ch, 0x0a35, 0x0a36) || | |
in_range(ch, 0x0a38, 0x0a39) || in_range(ch, 0x0a59, 0x0a5c) || | |
0x0a5e == ch) | |
{ | |
return universal_char_type_valid; // Gurmukhi | |
} | |
if (in_range(ch, 0x0a85, 0x0a8b) || 0x0a8d == ch || | |
in_range(ch, 0x0a8f, 0x0a91) || in_range(ch, 0x0a93, 0x0aa8) || | |
in_range(ch, 0x0aaa, 0x0ab0) || in_range(ch, 0x0ab2, 0x0ab3) || | |
in_range(ch, 0x0ab5, 0x0ab9) || 0x0ae0 == ch) | |
{ | |
return universal_char_type_valid; // Gujarati | |
} | |
if (in_range(ch, 0x0b05, 0x0b0c) || in_range(ch, 0x0b0f, 0x0b10) || | |
in_range(ch, 0x0b13, 0x0b28) || in_range(ch, 0x0b2a, 0x0b30) || | |
in_range(ch, 0x0b32, 0x0b33) || in_range(ch, 0x0b36, 0x0b39) || | |
in_range(ch, 0x0b5c, 0x0b5d) || in_range(ch, 0x0b5f, 0x0b61)) | |
{ | |
return universal_char_type_valid; // Oriya | |
} | |
if (in_range(ch, 0x0b85, 0x0b8a) || in_range(ch, 0x0b8e, 0x0b90) || | |
in_range(ch, 0x0b92, 0x0b95) || in_range(ch, 0x0b99, 0x0b9a) || | |
0x0b9c == ch || in_range(ch, 0x0b9e, 0x0b9f) || | |
in_range(ch, 0x0ba3, 0x0ba4) || in_range(ch, 0x0ba8, 0x0baa) || | |
in_range(ch, 0x0bae, 0x0bb5) || in_range(ch, 0x0bb7, 0x0bb9)) | |
{ | |
return universal_char_type_valid; // Tamil | |
} | |
if (in_range(ch, 0x0c05, 0x0c0c) || in_range(ch, 0x0c0e, 0x0c10) || | |
in_range(ch, 0x0c12, 0x0c28) || in_range(ch, 0x0c2a, 0x0c33) || | |
in_range(ch, 0x0c35, 0x0c39) || in_range(ch, 0x0c60, 0x0c61)) | |
{ | |
return universal_char_type_valid; // Telugu | |
} | |
if (in_range(ch, 0x0c85, 0x0c8c) || in_range(ch, 0x0c8e, 0x0c90) || | |
in_range(ch, 0x0c92, 0x0ca8) || in_range(ch, 0x0caa, 0x0cb3) || | |
in_range(ch, 0x0cb5, 0x0cb9) || in_range(ch, 0x0ce0, 0x0ce1)) | |
{ | |
return universal_char_type_valid; // Kannada | |
} | |
if (in_range(ch, 0x0d05, 0x0d0c) || in_range(ch, 0x0d0e, 0x0d10) || | |
in_range(ch, 0x0d12, 0x0d28) || in_range(ch, 0x0d2a, 0x0d39) || | |
in_range(ch, 0x0d60, 0x0d61)) | |
{ | |
return universal_char_type_valid; // Malayalam | |
} | |
if (in_range(ch, 0x0e01, 0x0e30) || in_range(ch, 0x0e32, 0x0e33) || | |
in_range(ch, 0x0e40, 0x0e46) || in_range(ch, 0x0e4f, 0x0e5b)) | |
{ | |
return universal_char_type_valid; // Thai | |
} | |
return universal_char_type_not_allowed_for_identifiers; | |
} | |
/////////////////////////////////////////////////////////////////////////////// | |
// | |
// validate_identifier_name | |
// | |
// The validate_identifier_name function tests a given identifier name for | |
// its validity with regard to eventually contained universal characters. | |
// These should be in valid ranges (see the function | |
// classify_universal_char above). | |
// | |
// If the identifier name contains invalid or not allowed universal | |
// characters a corresponding lexing_exception is thrown. | |
// | |
/////////////////////////////////////////////////////////////////////////////// | |
template <typename StringT> | |
inline void | |
validate_identifier_name (StringT const &name, int line, int column, | |
StringT const &file_name) | |
{ | |
using namespace std; // some systems have strtoul in namespace std:: | |
typename StringT::size_type pos = name.find_first_of('\\'); | |
while (StringT::npos != pos) { | |
// the identifier name contains a backslash (must be universal char) | |
BOOST_ASSERT('u' == name[pos+1] || 'U' == name[pos+1]); | |
StringT uchar_val(name.substr(pos+2, ('u' == name[pos+1]) ? 4 : 8)); | |
universal_char_type type = | |
classify_universal_char(strtoul(uchar_val.c_str(), 0, 16)); | |
if (universal_char_type_valid != type) { | |
// an invalid char was found, so throw an exception | |
StringT error_uchar(name.substr(pos, ('u' == name[pos+1]) ? 6 : 10)); | |
if (universal_char_type_invalid == type) { | |
BOOST_WAVE_LEXER_THROW(lexing_exception, universal_char_invalid, | |
error_uchar, line, column, file_name.c_str()); | |
} | |
else if (universal_char_type_base_charset == type) { | |
BOOST_WAVE_LEXER_THROW(lexing_exception, universal_char_base_charset, | |
error_uchar, line, column, file_name.c_str()); | |
} | |
else { | |
BOOST_WAVE_LEXER_THROW(lexing_exception, universal_char_not_allowed, | |
error_uchar, line, column, file_name.c_str()); | |
} | |
} | |
// find next universal char (if appropriate) | |
pos = name.find_first_of('\\', pos+2); | |
} | |
} | |
/////////////////////////////////////////////////////////////////////////////// | |
// | |
// validate_literal | |
// | |
// The validate_literal function tests a given string or character literal | |
// for its validity with regard to eventually contained universal | |
// characters. These should be in valid ranges (see the function | |
// classify_universal_char above). | |
// | |
// If the string or character literal contains invalid or not allowed | |
// universal characters a corresponding lexing_exception is thrown. | |
// | |
/////////////////////////////////////////////////////////////////////////////// | |
template <typename StringT> | |
inline void | |
validate_literal (StringT const &name, int line, int column, | |
StringT const &file_name) | |
{ | |
using namespace std; // some systems have strtoul in namespace std:: | |
typename StringT::size_type pos = name.find_first_of('\\'); | |
while (StringT::npos != pos) { | |
// the literal contains a backslash (may be universal char) | |
if ('u' == name[pos+1] || 'U' == name[pos+1]) { | |
StringT uchar_val(name.substr(pos+2, ('u' == name[pos+1]) ? 4 : 8)); | |
universal_char_type type = | |
classify_universal_char(strtoul(uchar_val.c_str(), 0, 16)); | |
if (universal_char_type_valid != type && | |
universal_char_type_not_allowed_for_identifiers != type) | |
{ | |
// an invalid char was found, so throw an exception | |
StringT error_uchar(name.substr(pos, ('u' == name[pos+1]) ? 6 : 10)); | |
if (universal_char_type_invalid == type) { | |
BOOST_WAVE_LEXER_THROW(lexing_exception, universal_char_invalid, | |
error_uchar, line, column, file_name.c_str()); | |
} | |
else { | |
BOOST_WAVE_LEXER_THROW(lexing_exception, universal_char_base_charset, | |
error_uchar, line, column, file_name.c_str()); | |
} | |
} | |
} | |
// find next universal char (if appropriate) | |
pos = name.find_first_of('\\', pos+2); | |
} | |
} | |
/////////////////////////////////////////////////////////////////////////////// | |
} // namespace impl | |
} // namespace cpplexer | |
} // namespace wave | |
} // namespace boost | |
// the suffix header occurs after all of the code | |
#ifdef BOOST_HAS_ABI_HEADERS | |
#include BOOST_ABI_SUFFIX | |
#endif | |
#endif // !defined(VALIDATE_UNIVERSAL_CHAR_HPP_55F1B811_CD76_4C72_8344_CBC69CF3B339_INCLUDED) |