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inet/ether_aton_r.c
62 строки
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Paul Eggert
Update copyright dates with scripts/update-copyrights
02 янв 2026, 00:42
02 янв 2026, 00:42
66f3e92
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/* Copyright (C) 1996-2026 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C 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 2.1 of the License, or (at your option) any later version. The GNU C 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 the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ #include <ctype.h> #include <stdlib.h> #include <netinet/ether.h> #include <netinet/if_ether.h> struct ether_addr * ether_aton_r (const char *asc, struct ether_addr *addr) { size_t cnt; for (cnt = 0; cnt < 6; ++cnt) { unsigned int number; char ch; ch = _tolower (*asc++); if ((ch < '0' || ch > '9') && (ch < 'a' || ch > 'f')) return NULL; number = isdigit (ch) ? (ch - '0') : (ch - 'a' + 10); ch = _tolower (*asc); if ((cnt < 5 && ch != ':') || (cnt == 5 && ch != '\0' && !isspace (ch))) { ++asc; if ((ch < '0' || ch > '9') && (ch < 'a' || ch > 'f')) return NULL; number <<= 4; number += isdigit (ch) ? (ch - '0') : (ch - 'a' + 10); ch = *asc; if (cnt < 5 && ch != ':') return NULL; } /* Store result. */ addr->ether_addr_octet[cnt] = (unsigned char) number; /* Skip ':'. */ ++asc; } return addr; } libc_hidden_def (ether_aton_r)