57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
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/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#include <string.h>
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#include <sys/types.h>
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/*
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* Appends src to the dstsize buffer at dst. The append will never
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* overflow the destination buffer and the buffer will always be null
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* terminated. Never reference beyond &dst[dstsize-1] when computing
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* the length of the pre-existing string.
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*/
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size_t
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strlcat(char *dst, const char *src, size_t dstsize)
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{
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char *df = dst;
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size_t left = dstsize;
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size_t l1;
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size_t l2 = strlen(src);
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size_t copied;
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while (left-- != 0 && *df != '\0')
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df++;
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l1 = df - dst;
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if (dstsize == l1)
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return (l1 + l2);
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copied = l1 + l2 >= dstsize ? dstsize - l1 - 1 : l2;
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(void) memcpy(dst + l1, src, copied);
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dst[l1+copied] = '\0';
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return (l1 + l2);
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}
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