1 files changed, 100 insertions, 0 deletions
diff --git a/StdLib/LibC/Stdio/fgetwc.c b/StdLib/LibC/Stdio/fgetwc.c
new file mode 100644
index 0000000000..548192390d
--- /dev/null
+++ b/StdLib/LibC/Stdio/fgetwc.c
@@ -0,0 +1,100 @@
+/*-
+ * Copyright (c)2001 Citrus Project,
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $Citrus$
+
+  NetBSD: fgetwc.c,v 1.5 2006/07/03 17:06:36 tnozaki Exp
+ */
+#include  <LibConfig.h>
+#include  <sys/EfiCdefs.h>
+
+#include  <assert.h>
+#include  <errno.h>
+#include  <stdio.h>
+#include  <wchar.h>
+#include  "reentrant.h"
+#include  "local.h"
+
+wint_t
+__fgetwc_unlock(FILE *fp)
+{
+  struct wchar_io_data *wcio;
+  mbstate_t *st;
+  wchar_t wc;
+  size_t size;
+
+  _DIAGASSERT(fp != NULL);
+
+  _SET_ORIENTATION(fp, 1);
+  wcio = WCIO_GET(fp);
+  if (wcio == 0) {
+    errno = ENOMEM;
+    return WEOF;
+  }
+
+  /* if there're ungetwc'ed wchars, use them */
+  if (wcio->wcio_ungetwc_inbuf) {
+    wc = wcio->wcio_ungetwc_buf[--wcio->wcio_ungetwc_inbuf];
+
+    return wc;
+  }
+
+  st = &wcio->wcio_mbstate_in;
+
+  do {
+    char c;
+    int ch = __sgetc(fp);
+
+    if (ch == EOF) {
+      return WEOF;
+    }
+
+    c = (char)ch;
+    size = mbrtowc(&wc, &c, 1, st);
+    if (size == (size_t)-1) {
+      errno = EILSEQ;
+      fp->_flags |= __SERR;
+      return WEOF;
+    }
+  } while (size == (size_t)-2);
+
+  _DIAGASSERT(size == 1);
+
+  return wc;
+}
+
+wint_t
+fgetwc(FILE *fp)
+{
+  wint_t r;
+
+  _DIAGASSERT(fp != NULL);
+
+  FLOCKFILE(fp);
+  r = __fgetwc_unlock(fp);
+  FUNLOCKFILE(fp);
+
+  return (r);
+}