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Use OpenBSD strlcpy() - smdev - suckless mdev
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---
commit b1b09f7896b6d2f3fca3cc0c74a85d9e2f246bfa
parent b221ca33fd0deb80fadcdf9bd06392f9e2480553
Author: sin <[email protected]>
Date: Sat, 2 Aug 2014 13:51:52 +0100
Use OpenBSD strlcpy()
I don't remember where the previous implementation comes from and
therefore I can't provide appropriate credit.
Diffstat:
M util/strlcpy.c | 49 +++++++++++++++++++++++++----…
1 file changed, 40 insertions(+), 9 deletions(-)
---
diff --git a/util/strlcpy.c b/util/strlcpy.c
@@ -1,16 +1,47 @@
-#include <stdio.h>
+/*
+ * Copyright (c) 1998 Todd C. Miller <[email protected]>
+ *
+ * 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 <sys/types.h>
#include <string.h>
#include "../util.h"
+/*
+ * Copy src to string dst of size siz. At most siz-1 characters
+ * will be copied. Always NUL terminates (unless siz == 0).
+ * Returns strlen(src); if retval >= siz, truncation occurred.
+ */
size_t
-strlcpy(char *dest, const char *src, size_t size)
+strlcpy(char *dst, const char *src, size_t siz)
{
- size_t ret = strlen(src);
-
- if (size) {
- size_t len = (ret >= size) ? size - 1 : ret;
- memcpy(dest, src, len);
- dest[len] = '\0';
+ char *d = dst;
+ const char *s = src;
+ size_t n = siz;
+ /* Copy as many bytes as will fit */
+ if (n != 0) {
+ while (--n != 0) {
+ if ((*d++ = *s++) == '\0')
+ break;
+ }
+ }
+ /* Not enough room in dst, add NUL and traverse rest of src */
+ if (n == 0) {
+ if (siz != 0)
+ *d = '\0'; /* NUL-terminate dst */
+ while (*s++)
+ ;
}
- return ret;
+ return(s - src - 1); /* count does not include NUL */
}
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