323 lines
13 KiB
C++
323 lines
13 KiB
C++
/*=============================================================================
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Boost.Wave: A Standard compliant C++ preprocessor library
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Grammar for universal character validation (see C++ standard: Annex E)
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http://www.boost.org/
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Copyright (c) 2001-2012 Hartmut Kaiser. Distributed under the Boost
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Software License, Version 1.0. (See accompanying file
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LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#if !defined(BOOST_VALIDATE_UNIVERSAL_CHAR_HPP_55F1B811_CD76_4C72_8344_CBC69CF3B339_INCLUDED)
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#define BOOST_VALIDATE_UNIVERSAL_CHAR_HPP_55F1B811_CD76_4C72_8344_CBC69CF3B339_INCLUDED
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#include <boost/assert.hpp>
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#include <boost/wave/wave_config.hpp>
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#include <boost/wave/util/file_position.hpp>
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#include <boost/wave/cpplexer/cpplexer_exceptions.hpp>
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// this must occur after all of the includes and before any code appears
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#ifdef BOOST_HAS_ABI_HEADERS
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#include BOOST_ABI_PREFIX
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#endif
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///////////////////////////////////////////////////////////////////////////////
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namespace boost {
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namespace wave {
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namespace cpplexer {
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namespace impl {
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enum universal_char_type {
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universal_char_type_valid = 0,
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universal_char_type_invalid = 1,
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universal_char_type_base_charset = 2,
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universal_char_type_not_allowed_for_identifiers = 3
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};
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///////////////////////////////////////////////////////////////////////////
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//
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// is_range is a helper function for the classification by brute force
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// below
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//
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///////////////////////////////////////////////////////////////////////////
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inline bool
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in_range(unsigned long ch, unsigned long l, unsigned long u)
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{
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return (l <= ch && ch <= u);
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// classify_universal_char
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//
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// This function classifies an universal character value into 4 subranges:
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// universal_char_type_valid
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// the universal character value is valid for identifiers
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// universal_char_type_invalid
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// the universal character value is not valid for its usage inside
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// identifiers (see C++ Standard: 2.2.2 [lex.charset])
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// universal_char_type_base_charset
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// the universal character value designates a character from the base
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// character set
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// universal_char_type_not_allowed_for_identifiers
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// the universal character value is not allowed in an identifier
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//
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// Implementation note:
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// This classification isn't implemented very effectively here. This
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// function should be rewritten with some range run matching algorithm.
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//
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///////////////////////////////////////////////////////////////////////////////
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inline universal_char_type
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classify_universal_char (unsigned long ch)
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{
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// test for invalid characters
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if (ch <= 0x0020 || in_range(ch, 0x007f, 0x009f))
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return universal_char_type_invalid;
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// test for characters in the range of the base character set
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if (in_range(ch, 0x0021, 0x005f) || in_range(ch, 0x0061, 0x007e))
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return universal_char_type_base_charset;
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// test for additional valid character values (see C++ Standard: Annex E)
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if (in_range(ch, 0x00c0, 0x00d6) || in_range(ch, 0x00d8, 0x00f6) ||
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in_range(ch, 0x00f8, 0x01f5) || in_range(ch, 0x01fa, 0x0217) ||
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in_range(ch, 0x0250, 0x02a8) || in_range(ch, 0x1e00, 0x1e9a) ||
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in_range(ch, 0x1ea0, 0x1ef9))
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{
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return universal_char_type_valid; // Latin
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}
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if (0x0384 == ch || in_range(ch, 0x0388, 0x038a) ||
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0x038c == ch || in_range(ch, 0x038e, 0x03a1) ||
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in_range(ch, 0x03a3, 0x03ce) || in_range(ch, 0x03d0, 0x03d6) ||
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0x03da == ch || 0x03dc == ch || 0x03de == ch || 0x03e0 == ch ||
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in_range(ch, 0x03e2, 0x03f3) || in_range(ch, 0x1f00, 0x1f15) ||
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in_range(ch, 0x1f18, 0x1f1d) || in_range(ch, 0x1f20, 0x1f45) ||
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in_range(ch, 0x1f48, 0x1f4d) || in_range(ch, 0x1f50, 0x1f57) ||
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0x1f59 == ch || 0x1f5b == ch || 0x1f5d == ch ||
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in_range(ch, 0x1f5f, 0x1f7d) || in_range(ch, 0x1f80, 0x1fb4) ||
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in_range(ch, 0x1fb6, 0x1fbc) || in_range(ch, 0x1fc2, 0x1fc4) ||
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in_range(ch, 0x1fc6, 0x1fcc) || in_range(ch, 0x1fd0, 0x1fd3) ||
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in_range(ch, 0x1fd6, 0x1fdb) || in_range(ch, 0x1fe0, 0x1fec) ||
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in_range(ch, 0x1ff2, 0x1ff4) || in_range(ch, 0x1ff6, 0x1ffc))
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{
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return universal_char_type_valid; // Greek
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}
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if (in_range(ch, 0x0401, 0x040d) || in_range(ch, 0x040f, 0x044f) ||
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in_range(ch, 0x0451, 0x045c) || in_range(ch, 0x045e, 0x0481) ||
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in_range(ch, 0x0490, 0x04c4) || in_range(ch, 0x04c7, 0x04c8) ||
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in_range(ch, 0x04cb, 0x04cc) || in_range(ch, 0x04d0, 0x04eb) ||
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in_range(ch, 0x04ee, 0x04f5) || in_range(ch, 0x04f8, 0x04f9))
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{
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return universal_char_type_valid; // Cyrillic
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}
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if (in_range(ch, 0x0531, 0x0556) || in_range(ch, 0x0561, 0x0587))
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return universal_char_type_valid; // Armenian
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if (in_range(ch, 0x05d0, 0x05ea) || in_range(ch, 0x05f0, 0x05f4))
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return universal_char_type_valid; // Hebrew
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if (in_range(ch, 0x0621, 0x063a) || in_range(ch, 0x0640, 0x0652) ||
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in_range(ch, 0x0670, 0x06b7) || in_range(ch, 0x06ba, 0x06be) ||
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in_range(ch, 0x06c0, 0x06ce) || in_range(ch, 0x06e5, 0x06e7))
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{
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return universal_char_type_valid; // Arabic
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}
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if (in_range(ch, 0x0905, 0x0939) || in_range(ch, 0x0958, 0x0962))
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return universal_char_type_valid; // Devanagari
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if (in_range(ch, 0x0985, 0x098c) || in_range(ch, 0x098f, 0x0990) ||
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in_range(ch, 0x0993, 0x09a8) || in_range(ch, 0x09aa, 0x09b0) ||
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0x09b2 == ch || in_range(ch, 0x09b6, 0x09b9) ||
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in_range(ch, 0x09dc, 0x09dd) || in_range(ch, 0x09df, 0x09e1) ||
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in_range(ch, 0x09f0, 0x09f1))
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{
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return universal_char_type_valid; // Bengali
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}
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if (in_range(ch, 0x0a05, 0x0a0a) || in_range(ch, 0x0a0f, 0x0a10) ||
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in_range(ch, 0x0a13, 0x0a28) || in_range(ch, 0x0a2a, 0x0a30) ||
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in_range(ch, 0x0a32, 0x0a33) || in_range(ch, 0x0a35, 0x0a36) ||
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in_range(ch, 0x0a38, 0x0a39) || in_range(ch, 0x0a59, 0x0a5c) ||
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0x0a5e == ch)
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{
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return universal_char_type_valid; // Gurmukhi
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}
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if (in_range(ch, 0x0a85, 0x0a8b) || 0x0a8d == ch ||
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in_range(ch, 0x0a8f, 0x0a91) || in_range(ch, 0x0a93, 0x0aa8) ||
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in_range(ch, 0x0aaa, 0x0ab0) || in_range(ch, 0x0ab2, 0x0ab3) ||
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in_range(ch, 0x0ab5, 0x0ab9) || 0x0ae0 == ch)
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{
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return universal_char_type_valid; // Gujarati
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}
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if (in_range(ch, 0x0b05, 0x0b0c) || in_range(ch, 0x0b0f, 0x0b10) ||
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in_range(ch, 0x0b13, 0x0b28) || in_range(ch, 0x0b2a, 0x0b30) ||
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in_range(ch, 0x0b32, 0x0b33) || in_range(ch, 0x0b36, 0x0b39) ||
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in_range(ch, 0x0b5c, 0x0b5d) || in_range(ch, 0x0b5f, 0x0b61))
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{
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return universal_char_type_valid; // Oriya
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}
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if (in_range(ch, 0x0b85, 0x0b8a) || in_range(ch, 0x0b8e, 0x0b90) ||
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in_range(ch, 0x0b92, 0x0b95) || in_range(ch, 0x0b99, 0x0b9a) ||
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0x0b9c == ch || in_range(ch, 0x0b9e, 0x0b9f) ||
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in_range(ch, 0x0ba3, 0x0ba4) || in_range(ch, 0x0ba8, 0x0baa) ||
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in_range(ch, 0x0bae, 0x0bb5) || in_range(ch, 0x0bb7, 0x0bb9))
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{
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return universal_char_type_valid; // Tamil
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}
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if (in_range(ch, 0x0c05, 0x0c0c) || in_range(ch, 0x0c0e, 0x0c10) ||
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in_range(ch, 0x0c12, 0x0c28) || in_range(ch, 0x0c2a, 0x0c33) ||
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in_range(ch, 0x0c35, 0x0c39) || in_range(ch, 0x0c60, 0x0c61))
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{
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return universal_char_type_valid; // Telugu
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}
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if (in_range(ch, 0x0c85, 0x0c8c) || in_range(ch, 0x0c8e, 0x0c90) ||
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in_range(ch, 0x0c92, 0x0ca8) || in_range(ch, 0x0caa, 0x0cb3) ||
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in_range(ch, 0x0cb5, 0x0cb9) || in_range(ch, 0x0ce0, 0x0ce1))
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{
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return universal_char_type_valid; // Kannada
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}
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if (in_range(ch, 0x0d05, 0x0d0c) || in_range(ch, 0x0d0e, 0x0d10) ||
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in_range(ch, 0x0d12, 0x0d28) || in_range(ch, 0x0d2a, 0x0d39) ||
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in_range(ch, 0x0d60, 0x0d61))
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{
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return universal_char_type_valid; // Malayalam
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}
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if (in_range(ch, 0x0e01, 0x0e30) || in_range(ch, 0x0e32, 0x0e33) ||
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in_range(ch, 0x0e40, 0x0e46) || in_range(ch, 0x0e4f, 0x0e5b))
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{
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return universal_char_type_valid; // Thai
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}
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return universal_char_type_not_allowed_for_identifiers;
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// validate_identifier_name
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//
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// The validate_identifier_name function tests a given identifier name for
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// its validity with regard to eventually contained universal characters.
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// These should be in valid ranges (see the function
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// classify_universal_char above).
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//
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// If the identifier name contains invalid or not allowed universal
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// characters a corresponding lexing_exception is thrown.
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//
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///////////////////////////////////////////////////////////////////////////////
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template <typename StringT>
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inline void
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validate_identifier_name (StringT const &name, std::size_t line,
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std::size_t column, StringT const &file_name)
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{
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using namespace std; // some systems have strtoul in namespace std::
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typename StringT::size_type pos = name.find_first_of('\\');
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while (StringT::npos != pos) {
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// the identifier name contains a backslash (must be universal char)
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BOOST_ASSERT('u' == name[pos+1] || 'U' == name[pos+1]);
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StringT uchar_val(name.substr(pos + 2, ('u' == name[pos + 1]) ? 4 : 8));
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universal_char_type type =
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classify_universal_char(strtoul(uchar_val.c_str(), 0, 16));
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if (universal_char_type_valid != type) {
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// an invalid char was found, so throw an exception
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StringT error_uchar(name.substr(pos, ('u' == name[pos + 1]) ? 6 : 10));
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if (universal_char_type_invalid == type) {
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BOOST_WAVE_LEXER_THROW(lexing_exception, universal_char_invalid,
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error_uchar, line, column, file_name.c_str());
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}
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else if (universal_char_type_base_charset == type) {
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BOOST_WAVE_LEXER_THROW(lexing_exception, universal_char_base_charset,
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error_uchar, line, column, file_name.c_str());
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}
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else {
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BOOST_WAVE_LEXER_THROW(lexing_exception, universal_char_not_allowed,
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error_uchar, line, column, file_name.c_str());
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}
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}
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// find next universal char (if appropriate)
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pos = name.find_first_of('\\', pos+2);
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// validate_literal
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//
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// The validate_literal function tests a given string or character literal
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// for its validity with regard to eventually contained universal
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// characters. These should be in valid ranges (see the function
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// classify_universal_char above).
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//
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// If the string or character literal contains invalid or not allowed
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// universal characters a corresponding lexing_exception is thrown.
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//
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///////////////////////////////////////////////////////////////////////////////
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template <typename StringT>
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inline void
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validate_literal (StringT const &name, std::size_t line, std::size_t column,
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StringT const &file_name)
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{
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using namespace std; // some systems have strtoul in namespace std::
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typename StringT::size_type pos = name.find_first_of('\\');
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while (StringT::npos != pos) {
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// the literal contains a backslash (may be universal char)
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if ('u' == name[pos+1] || 'U' == name[pos+1]) {
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StringT uchar_val(name.substr(pos + 2, ('u' == name[pos + 1]) ? 4 : 8));
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universal_char_type type =
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classify_universal_char(strtoul(uchar_val.c_str(), 0, 16));
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if (universal_char_type_valid != type &&
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universal_char_type_not_allowed_for_identifiers != type)
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{
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// an invalid char was found, so throw an exception
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StringT error_uchar(name.substr(pos, ('u' == name[pos + 1]) ? 6 : 10));
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if (universal_char_type_invalid == type) {
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BOOST_WAVE_LEXER_THROW(lexing_exception, universal_char_invalid,
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error_uchar, line, column, file_name.c_str());
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}
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else {
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BOOST_WAVE_LEXER_THROW(lexing_exception, universal_char_base_charset,
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error_uchar, line, column, file_name.c_str());
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}
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}
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}
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// find next universal char (if appropriate)
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pos = name.find_first_of('\\', pos+2);
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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} // namespace impl
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} // namespace cpplexer
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} // namespace wave
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} // namespace boost
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// the suffix header occurs after all of the code
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#ifdef BOOST_HAS_ABI_HEADERS
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#include BOOST_ABI_SUFFIX
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#endif
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#endif // !defined(BOOST_VALIDATE_UNIVERSAL_CHAR_HPP_55F1B811_CD76_4C72_8344_CBC69CF3B339_INCLUDED)
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