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/*
* Author Jerry Lundström <jerry@dns-oarc.net>
* Copyright (c) 2019, OARC, Inc.
* All rights reserved.
*
* This file is part of the dnswire library.
*
* dnswire library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* dnswire library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with dnswire library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "dnswire/trace.h"
#if DNSWIRE_TRACE
const char* __printable_string(const uint8_t* data, size_t len)
{
static char buf[512];
size_t r = 0, w = 0;
while (r < len && w < sizeof(buf) - 1) {
if (isprint(data[r])) {
buf[w++] = data[r++];
} else {
if (w + 4 >= sizeof(buf) - 1) {
break;
}
sprintf(&buf[w], "\\x%02x", data[r++]);
w += 4;
}
}
if (w >= sizeof(buf)) {
buf[sizeof(buf) - 1] = 0;
} else {
buf[w] = 0;
}
return buf;
}
#endif
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