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https://git.kernel.org/pub/scm/network/wireless/iwd.git
synced 2024-11-18 01:59:31 +01:00
bf25abf38d
Use a static buffer for converting an SSID to an approximate string in UTF8. Replace each char that is not UTF8 compatible with the UTF8 replacement symbol.
77 lines
1.7 KiB
C
77 lines
1.7 KiB
C
/*
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*
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* Wireless daemon for Linux
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*
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* Copyright (C) 2014 Intel Corporation. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <string.h>
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#include <ell/string.h>
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#include "util.h"
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const char *util_ssid_to_utf8(size_t len, const uint8_t *ssid)
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{
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static char buf[3* 32 + 1];
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size_t i = 0, pos = 0;
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const uint8_t *start = ssid, *end;
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memset(buf, 0, sizeof(buf));
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if (len > 32)
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goto no_ssid;
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while (i < len && !ssid[i])
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i++;
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if (i == len)
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goto no_ssid;
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i = len;
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while (i && (!l_utf8_validate((const char *)start, i,
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(const char **)&end))) {
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const char replacement[] = { 0xEF, 0xBF, 0xBD };
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int bytes = end - start;
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memcpy(&buf[pos], start, bytes);
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pos += bytes;
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memcpy(&buf[pos], replacement, sizeof(replacement));
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pos += sizeof(replacement);
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start = end + 1;
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i -= (bytes + 1);
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}
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if (i) {
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memcpy(&buf[pos], start, i);
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pos += i;
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}
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no_ssid:
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buf[pos] = '\0';
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return buf;
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}
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