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/** @file
* @brief Append a string to an object description, escaping invalid UTF-8
*/
/* Copyright (C) 2013,2019,2024 Olly Betts
*
* 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 2 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, see
* <https://www.gnu.org/licenses/>.
*/
#include <config.h>
#include "description_append.h"
#include "xapian/unicode.h"
#include <string>
#include <string_view>
using namespace std;
void
description_append(std::string& desc, std::string_view s)
{
desc.reserve(desc.size() + s.size());
for (Xapian::Utf8Iterator i(s); i != Xapian::Utf8Iterator(); ++i) {
unsigned ch = i.strict_deref();
if ((ch & 0x80000000) == 0 && ch >= ' ' && ch != '\\' && ch != 127) {
Xapian::Unicode::append_utf8(desc, ch);
} else {
desc.append("\\x", 2);
desc += "0123456789abcdef"[(ch >> 4) & 0x0f];
desc += "0123456789abcdef"[ch & 0x0f];
}
}
}
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