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-rw-r--r--project/common.mk1
-rw-r--r--src/u16_mbstowcs.c36
2 files changed, 37 insertions, 0 deletions
diff --git a/project/common.mk b/project/common.mk
index 49fdcae..af8cf6b 100644
--- a/project/common.mk
+++ b/project/common.mk
@@ -1,6 +1,7 @@
API_SRCS = \
src/u16_mbsinit.c \
src/u16_mbrtowc.c \
+ src/u16_mbstowcs.c \
INTERNAL_SRCS = \
diff --git a/src/u16_mbstowcs.c b/src/u16_mbstowcs.c
new file mode 100644
index 0000000..8b84379
--- /dev/null
+++ b/src/u16_mbstowcs.c
@@ -0,0 +1,36 @@
+/*******************************************************************/
+/* u16ports: u16 variants of wide character string functions. */
+/* Copyright (C) 2017 Z. Gilboa */
+/* Released under the Standard MIT License; see COPYING.U16PORTS. */
+/*******************************************************************/
+
+#include <wchar.h>
+#include <uchar.h>
+#include <u16ports/u16ports.h>
+
+size_t u16_mbstowcs(uint16_t * dst, const char * src, size_t len)
+{
+ size_t nbytes;
+ uint16_t * wch;
+ mbstate_t st = {0};
+
+ for (wch=dst; len; src+=nbytes) {
+ if ((nbytes = mbrtoc16(wch,src,4,&st)) == (size_t)-1) {
+ return (size_t)(-1);
+
+ } else if (nbytes == 0) {
+ return wch - dst;
+
+ } else if (nbytes == (size_t)-3) {
+ nbytes = 0;
+ len--;
+ wch++;
+
+ } else {
+ len--;
+ wch++;
+ }
+ }
+
+ return wch - dst;
+}