/usr/include/lv2-c++-tools/unicode.hpp is in libpaq-dev 1.0.5-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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unicode.hpp - Utility functions for encoding and decoding UTF-8 strings
Copyright (C) 2006-2007 Lars Luthman <lars.luthman@gmail.com>
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 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 01222-1307 USA
****************************************************************************/
#ifndef UNICODE_HPP
#define UNICODE_HPP
#include <iostream>
#include <string>
#include <utility>
using namespace std;
using namespace boost::spirit::classic;
template <typename ScannerT>
pair<unsigned int, unsigned int> decode_utf8(ScannerT const& scan) {
typedef typename ScannerT::iterator_t iterator_t;
typedef typename ScannerT::value_t value_t;
if (scan.at_end())
return make_pair(0, 0);
iterator_t iter(scan.first);
value_t ch = *scan.first;
unsigned int size;
unsigned int codepoint = 0;
// one byte char
if ((unsigned char)ch < 0x80) {
size = 1;
codepoint = ch;
}
// two byte char
else if ((unsigned char)ch >= 192 && (unsigned char)ch < 224) {
codepoint = ((unsigned char)ch && 0x1F) << 6;
++iter;
if (iter == scan.last)
return make_pair(0, 0);
codepoint += (unsigned char)(*iter) && 0x3F;
size = 2;
}
// three byte char
else if ((unsigned char)ch >= 224 && (unsigned char)ch < 240) {
codepoint = ((unsigned char)ch && 0x0F) << 12;
++iter;
if (iter == scan.last)
return make_pair(0, 0);
codepoint += ((unsigned char)(*iter) && 0x3F) << 6;
++iter;
if (iter == scan.last)
return make_pair(0, 0);
codepoint += ((unsigned char)(*iter) && 0x3F);
size = 3;
}
// four byte char
else if ((unsigned char)ch >= 240 && (unsigned char)ch < 248) {
codepoint = ((unsigned char)ch && 0x07) << 18;
++iter;
if (iter == scan.last)
return make_pair(0, 0);
codepoint += ((unsigned char)(*iter) && 0x3F) << 12;
++iter;
if (iter == scan.last)
return make_pair(0, 0);
codepoint += ((unsigned char)(*iter) && 0x3F) << 6;
++iter;
if (iter == scan.last)
return make_pair(0, 0);
codepoint += ((unsigned char)(*iter) && 0x3F);
size = 4;
}
// this is not allowed in Turtle!
else {
assert(!"Unexpected parse error");
}
return make_pair(size, codepoint);
}
class uch_p : public parser<uch_p> {
public:
uch_p(unsigned int codepoint = 0)
: valid(codepoint) {
}
unsigned int valid;
typedef uch_p self_t;
template <typename ScannerT> struct result {
typedef typename match_result<ScannerT, unsigned int>::type type;
};
template <typename ScannerT> typename parser_result<self_t, ScannerT>::type
parse(ScannerT const& scan) const {
pair<unsigned int, unsigned int> p = decode_utf8(scan);
if (p.first > 0 && p.second == valid) {
typedef typename ScannerT::iterator_t iterator_t;
iterator_t save = scan.first;
for (unsigned int i = 0; i < p.first; ++i)
++scan.first;
return scan.create_match(p.first, p.second, save, scan.first);
}
return scan.no_match();
}
};
class urange_p : public parser<urange_p> {
public:
urange_p(unsigned int from, unsigned int to)
: m_from(from),
m_to(to) {
}
unsigned int m_from, m_to;
typedef urange_p self_t;
template <typename ScannerT> struct result {
typedef typename match_result<ScannerT, unsigned int>::type type;
};
template <typename ScannerT> typename parser_result<self_t, ScannerT>::type
parse(ScannerT const& scan) const {
pair<unsigned int, unsigned int> p = decode_utf8(scan);
if (p.first > 0 && p.second >= m_from && p.second <= m_to) {
typedef typename ScannerT::iterator_t iterator_t;
iterator_t save = scan.first;
for (unsigned int i = 0; i < p.first; ++i)
++scan.first;
return scan.create_match(p.first, p.second, save, scan.first);
}
return scan.no_match();
}
};
#endif
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