/* $NetBSD: string.c,v 1.3.4.1 2024/02/29 12:35:04 martin Exp $ */ /* * Copyright (C) Internet Systems Consortium, Inc. ("ISC") * * SPDX-License-Identifier: MPL-2.0 * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, you can obtain one at https://mozilla.org/MPL/2.0/. * * See the COPYRIGHT file distributed with this work for additional * information regarding copyright ownership. */ /* * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 2001 Mike Barcroft * Copyright (c) 1990, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Chris Torek. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /*! \file */ #ifdef _GNU_SOURCE #undef _GNU_SOURCE #endif /* ifdef _GNU_SOURCE */ #include #include /* IWYU pragma: keep */ #if !defined(HAVE_STRLCPY) size_t strlcpy(char *dst, const char *src, size_t size) { char *d = dst; const char *s = src; size_t n = size; /* Copy as many bytes as will fit */ if (n != 0U && --n != 0U) { do { if ((*d++ = *s++) == 0) { break; } } while (--n != 0U); } /* Not enough room in dst, add NUL and traverse rest of src */ if (n == 0U) { if (size != 0U) { *d = '\0'; /* NUL-terminate dst */ } while (*s++) { } } return (s - src - 1); /* count does not include NUL */ } #endif /* !defined(HAVE_STRLCPY) */ #if !defined(HAVE_STRLCAT) size_t strlcat(char *dst, const char *src, size_t size) { char *d = dst; const char *s = src; size_t n = size; size_t dlen; /* Find the end of dst and adjust bytes left but don't go past end */ while (n-- != 0U && *d != '\0') { d++; } dlen = d - dst; n = size - dlen; if (n == 0U) { return (dlen + strlen(s)); } while (*s != '\0') { if (n != 1U) { *d++ = *s; n--; } s++; } *d = '\0'; return (dlen + (s - src)); /* count does not include NUL */ } #endif /* !defined(HAVE_STRLCAT) */ #if !defined(HAVE_STRNSTR) char * strnstr(const char *s, const char *find, size_t slen) { char c, sc; size_t len; if ((c = *find++) != '\0') { len = strlen(find); do { do { if (slen-- < 1 || (sc = *s++) == '\0') return (NULL); } while (sc != c); if (len > slen) return (NULL); } while (strncmp(s, find, len) != 0); s--; } return ((char *)s); } #endif int isc_string_strerror_r(int errnum, char *buf, size_t buflen) { return (strerror_r(errnum, buf, buflen)); }