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-rw-r--r--src/shared/strxcpyx.c104
1 files changed, 104 insertions, 0 deletions
diff --git a/src/shared/strxcpyx.c b/src/shared/strxcpyx.c
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+++ b/src/shared/strxcpyx.c
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+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ 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.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include "strxcpyx.h"
+
+size_t strpcpy(char **dest, size_t size, const char *src)
+{
+ size_t len;
+
+ len = strlen(src);
+ if (len >= size) {
+ if (size > 1)
+ *dest = mempcpy(*dest, src, size-1);
+ size = 0;
+ } else {
+ if (len > 0) {
+ *dest = mempcpy(*dest, src, len);
+ size -= len;
+ }
+ }
+ *dest[0] = '\0';
+ return size;
+}
+
+size_t strpcpyf(char **dest, size_t size, const char *src, ...)
+{
+ va_list va;
+ int i;
+
+ 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;
+
+ va_start(va, src);
+ do {
+ size = strpcpy(dest, size, src);
+ src = va_arg(va, char *);
+ } while (src != NULL);
+ va_end(va);
+ return size;
+}
+
+size_t strscpy(char *dest, size_t size, const char *src)
+{
+ char *s;
+
+ s = dest;
+ return strpcpy(&s, size, src);
+}
+
+size_t strscpyl(char *dest, size_t size, const char *src, ...) {
+ va_list va;
+ char *s;
+
+ va_start(va, src);
+ s = dest;
+ do {
+ size = strpcpy(&s, size, src);
+ src = va_arg(va, char *);
+ } while (src != NULL);
+ va_end(va);
+
+ return size;
+}