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authorMark Dykes <mardyk01@review.trustedfirmware.org>2020-09-11 18:44:19 +0000
committerTrustedFirmware Code Review <review@review.trustedfirmware.org>2020-09-11 18:44:19 +0000
commit34029d01c6effbbd643413b69c851cc24d047eaa (patch)
tree5096b3d6635f872e8fa00c0b0340edb9e1589a42 /lib
parentddf04313dc8ada22583e19307da6f94fd8f187cd (diff)
parent1123a5e2f973dc9f0223467f4782f6b2df542620 (diff)
downloadtrusted-firmware-a-34029d01c6effbbd643413b69c851cc24d047eaa.tar.gz
Merge "libc: Import strlcat from FreeBSD project" into integration
Diffstat (limited to 'lib')
-rw-r--r--lib/libc/strlcat.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/lib/libc/strlcat.c b/lib/libc/strlcat.c
new file mode 100644
index 0000000000..e60c863a57
--- /dev/null
+++ b/lib/libc/strlcat.c
@@ -0,0 +1,56 @@
+/* $OpenBSD: strlcat.c,v 1.15 2015/03/02 21:41:08 millert Exp $ */
+
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 1998, 2015 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <string.h>
+
+/*
+ * Appends src to string dst of size dsize (unlike strncat, dsize is the
+ * full size of dst, not space left). At most dsize-1 characters
+ * will be copied. Always NUL terminates (unless dsize <= strlen(dst)).
+ * Returns strlen(src) + MIN(dsize, strlen(initial dst)).
+ * If retval >= dsize, truncation occurred.
+ */
+size_t
+strlcat(char * dst, const char * src, size_t dsize)
+{
+ const char *odst = dst;
+ const char *osrc = src;
+ size_t n = dsize;
+ size_t dlen;
+
+ /* Find the end of dst and adjust bytes left but don't go past end. */
+ while (n-- != 0 && *dst != '\0')
+ dst++;
+ dlen = dst - odst;
+ n = dsize - dlen;
+
+ if (n-- == 0)
+ return(dlen + strlen(src));
+ while (*src != '\0') {
+ if (n != 0) {
+ *dst++ = *src;
+ n--;
+ }
+ src++;
+ }
+ *dst = '\0';
+
+ return(dlen + (src - osrc)); /* count does not include NUL */
+}