130 lines
3.4 KiB
C++
130 lines
3.4 KiB
C++
/*
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* Copyright (c) 2003-2009, John Wiegley. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of New Artisans LLC nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* @addtogroup utils
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*/
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/**
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* @file unistring.h
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* @author John Wiegley
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*
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* @ingroup utils
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*
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* @brief Brief
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*
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* Long.
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*/
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#ifndef _UNISTRING_H
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#define _UNISTRING_H
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namespace ledger {
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/**
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* @class unistring
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*
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* @brief Abstract working with UTF-32 encoded Unicode strings
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*
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* The input to the string is a UTF8 encoded ledger::string, which can
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* then have its true length be taken, or characters extracted.
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*/
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class unistring
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{
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std::vector<boost::uint32_t> utf32chars;
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public:
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unistring(const std::string& input)
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{
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TRACE_CTOR(unistring, "");
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const char * p = input.c_str();
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std::size_t len = input.length();
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VERIFY(utf8::is_valid(p, p + len));
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utf8::unchecked::utf8to32(p, p + len, std::back_inserter(utf32chars));
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}
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~unistring() {
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TRACE_DTOR(unistring);
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}
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std::size_t length() const {
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return utf32chars.size();
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}
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std::string extract(const std::string::size_type begin = 0,
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const std::string::size_type len = 0) const
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{
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std::string utf8result;
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std::string::size_type this_len = length();
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assert(begin <= this_len);
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assert(begin + len <= this_len);
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if (this_len)
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utf8::unchecked::utf32to8
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(utf32chars.begin() + begin,
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utf32chars.begin() + begin +
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(len ? (len > this_len ? this_len : len) : this_len),
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std::back_inserter(utf8result));
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return utf8result;
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}
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};
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inline void justify(std::ostream& out,
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const std::string& str,
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int width,
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bool right = false,
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bool redden = false)
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{
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if (! right) {
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if (redden) out << "\033[31m";
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out << str;
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if (redden) out << "\033[0m";
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}
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unistring temp(str);
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int spacing = width - int(temp.length());
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while (spacing-- > 0)
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out << ' ';
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if (right) {
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if (redden) out << "\033[31m";
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out << str;
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if (redden) out << "\033[0m";
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}
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}
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} // namespace ledger
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#endif // _UNISTRING_H
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