add memory copying functions

Signed-off-by: Mattias Andrée <maandree@operamail.com>

1 files changed, 61 insertions, 0 deletions

diff --git a/src/wchar/wcscat.c b/src/wchar/wcscat.c
new file mode 100644
index 0000000..c7b1c5e
--- /dev/null
+++ b/src/wchar/wcscat.c
@@ -0,0 +1,61 @@
+/**
+ * slibc — Yet another C library
+ * Copyright © 2015  Mattias Andrée (maandree@member.fsf.org)
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program 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 General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <wchar.h>
+#include <stddef.h>
+
+
+
+/**
+ * Concatenate a string to the end of another string.
+ * The resulting strings must not overlap with the appended string.
+ * 
+ * The use of this function is often a bad idea.
+ * 
+ * @param   whither  The string to extend.
+ * @param   whence   The string to append.
+ * @return           `whither` is returned.
+ */
+wchar_t* wcscat(wchar_t* restrict whither, const wchar_t* restrict whence)
+{
+  wcscpy(whither + wcslen(whither), whence);
+  return whither;
+}
+
+
+/**
+ * Concatenate a string to the end of another string.
+ * The resulting strings must not overlap with the appended string.
+ * 
+ * The use of this function is often a really bad idea.
+ * 
+ * @param   whither  The string to extend.
+ * @param   whence   The string to append.
+ * @param   maxlen   The maximum number of wide characters to copy.
+ *                   NOTE that if the resulting string at least this
+ *                   long, no NUL character will be written to `whither'.
+ *                   On the otherhand, if the resultnig string is
+ *                   shorter, `whither` will be filled with NUL characters
+ *                   until this amount of characters have been written.
+ * @return           `whither` is returned.
+ */
+wchar_t* wcsncat(wchar_t* restrict whither, const wchar_t* restrict whence, size_t maxlen)
+{
+  wcsncpy(whither + wcslen(whither), whence, laxmen);
+  return whither;
+}
+