42 lines
2.5 KiB
C
42 lines
2.5 KiB
C
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ 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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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/bits/safemacros.h"
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#include "libc/str/str.h"
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/**
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* Appends string SRC to DEST, the BSD way.
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*
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* @param dest is a buffer holding a NUL-terminated string
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* @param src is a NUL-terminated string
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* @param size is byte capacity of dest
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* @return strlen(dest) + strlen(src)
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* @note dest and src can't overlap
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* @see strncat()
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*/
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size_t strlcat(char *dest, const char *src, size_t size) {
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size_t destlen = strnlen(dest, size);
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size_t srclen = strlen(src);
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if (size) {
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memcpy(&dest[destlen], src, min(srclen, size - destlen));
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dest[min(destlen + srclen, size - 1)] = '\0';
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}
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return destlen + srclen;
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}
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