-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
+/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
Copyright 2013 Kay Sievers
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
/*
* Concatenates/copies strings. In any case, terminates in all cases
- * with '\0' * and moves the @dest pointer forward to the added '\0'.
- * Returns the * remaining size, and 0 if the string was truncated.
+ * with '\0' and moves the @dest pointer forward to the added '\0'.
+ * Returns the remaining size, and 0 if the string was truncated.
+ *
+ * Due to the intended usage, these helpers silently noop invocations
+ * having zero size. This is technically an exception to the above
+ * statement "terminates in all cases". It's unexpected for such calls to
+ * occur outside of a loop where this is the preferred behavior.
*/
+#include <stdarg.h>
#include <stdio.h>
#include <string.h>
+
#include "strxcpyx.h"
size_t strpcpy(char **dest, size_t size, const char *src) {
size_t len;
+ assert(dest);
+ assert(src);
+
+ if (size == 0)
+ return 0;
+
len = strlen(src);
if (len >= size) {
if (size > 1)
va_list va;
int i;
+ assert(dest);
+ assert(src);
+
+ if (size == 0)
+ return 0;
+
va_start(va, src);
i = vsnprintf(*dest, size, src, va);
if (i < (int)size) {
*dest += i;
size -= i;
} else {
- *dest += size;
size = 0;
}
va_end(va);
- *dest[0] = '\0';
return size;
}
size_t strpcpyl(char **dest, size_t size, const char *src, ...) {
va_list va;
+ assert(dest);
+ assert(src);
+
va_start(va, src);
do {
size = strpcpy(dest, size, src);
size_t strscpy(char *dest, size_t size, const char *src) {
char *s;
+ assert(dest);
+ assert(src);
+
s = dest;
return strpcpy(&s, size, src);
}
va_list va;
char *s;
+ assert(dest);
+ assert(src);
+
va_start(va, src);
s = dest;
do {