add memory copying functions

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

1 files changed, 53 insertions, 0 deletions

diff --git a/src/wchar/wmemcpy.c b/src/wchar/wmemcpy.c
new file mode 100644
index 0000000..5caef28
--- /dev/null
+++ b/src/wchar/wmemcpy.c
@@ -0,0 +1,53 @@
+/**
+ * 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>
+
+
+
+/**
+ * Copy a memory segment to another, non-overlapping, segment.
+ * 
+ * @param   whither  The destination memory segment.
+ * @param   whence   The source memory segment.
+ * @param   size     The number of wide characters to copy.
+ * @return           `whither` is returned.
+ */
+wchar_t* wmemcpy(wchar_t* restrict whither, const wchar_t* restrict whence, size_t size)
+{
+  wchar_t* r = whither;
+  while (size--)
+    *whither++ = *whence++;
+  return r;
+}
+
+
+/**
+ * Copy a memory segment to another, non-overlapping, segment.
+ * 
+ * This is a GNU extension.
+ * 
+ * @param   whither  The destination memory segment.
+ * @param   whence   The source memory segment.
+ * @param   size     The number of wide characters to copy.
+ * @return           `whither + size` is returned.
+ */
+wchar_t* wmempcpy(wchar_t* restrict whither, const wchar_t* restrict whence, size_t size)
+{
+  return wmemcpy(whither, whence, size) + size;
+}
+