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60 lines
2.2 KiB
C++
60 lines
2.2 KiB
C++
/*
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* is_utf8 is distributed under the following terms:
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*
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* Copyright (c) 2013 Palard Julien. 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
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* are met:
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* 1. 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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* 2. 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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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _IS_UTF8_H
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#define _IS_UTF8_H
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#include <stdlib.h>
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#include <sys/types.h>
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#include "intern_string.hh"
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struct utf8_scan_result {
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const char* usr_message{nullptr};
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size_t usr_faulty_bytes{0};
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string_fragment usr_valid_frag{string_fragment::invalid()};
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std::optional<string_fragment> usr_remaining;
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bool usr_has_ansi{false};
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size_t usr_column_width_guess{0};
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const char* remaining_ptr(const string_fragment& frag) const
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{
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if (this->usr_remaining) {
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return this->usr_remaining->begin();
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} else {
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return nullptr;
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}
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}
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bool is_valid() const { return this->usr_message == nullptr; }
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};
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utf8_scan_result is_utf8(string_fragment frag,
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std::optional<unsigned char> terminator
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= std::nullopt);
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#endif /* _IS_UTF8_H */
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