1a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project/* $OpenBSD: strlcpy.c,v 1.11 2006/05/05 15:27:38 millert Exp $ */ 2a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project 3a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project/* 4a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> 5a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project * 6a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project * Permission to use, copy, modify, and distribute this software for any 7a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project * purpose with or without fee is hereby granted, provided that the above 8a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project * copyright notice and this permission notice appear in all copies. 9a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project * 10a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project */ 18a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project 19a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project#include <sys/types.h> 20a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project#include <string.h> 21a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project 22a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project/* 23a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project * Copy src to string dst of size siz. At most siz-1 characters 24a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project * will be copied. Always NUL terminates (unless siz == 0). 25a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project * Returns strlen(src); if retval >= siz, truncation occurred. 26a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project */ 27a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Projectsize_t 28a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Projectstrlcpy(char *dst, const char *src, size_t siz) 29a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project{ 30a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project char *d = dst; 31a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project const char *s = src; 32a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project size_t n = siz; 33a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project 34a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project /* Copy as many bytes as will fit */ 35a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project if (n != 0) { 36a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project while (--n != 0) { 37a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project if ((*d++ = *s++) == '\0') 38a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project break; 39a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project } 4030a419afc3cdb641e350c7cfde753877675958e0André Goddard Rosa } 41a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project 42a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project /* Not enough room in dst, add NUL and traverse rest of src */ 43a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project if (n == 0) { 44a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project if (siz != 0) 45a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project *d = '\0'; /* NUL-terminate dst */ 46a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project while (*s++) 47a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project ; 48a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project } 49a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project 50a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project return(s - src - 1); /* count does not include NUL */ 51a27d2baa0c1a2ec70f47ea9199b1dd6762c8a34The Android Open Source Project} 52