Standard Libraries for EDK II.

[mirror_edk2.git] / StdLib / LibC / Stdio / fwide.c

diff --git a/StdLib/LibC/Stdio/fwide.c b/StdLib/LibC/Stdio/fwide.c
new file mode 100644 (file)
index 0000000..b89b7a3
--- /dev/null
+++ b/StdLib/LibC/Stdio/fwide.c
@@ -0,0 +1,72 @@
+/* $NetBSD: fwide.c,v 1.3 2005/06/12 05:21:27 lukem Exp $ */\r
+\r
+/*-\r
+ * Copyright (c)2001 Citrus Project,\r
+ * All rights reserved.\r
+ *\r
+ * Redistribution and use in source and binary forms, with or without\r
+ * modification, are permitted provided that the following conditions\r
+ * are met:\r
+ * 1. Redistributions of source code must retain the above copyright\r
+ *    notice, this list of conditions and the following disclaimer.\r
+ * 2. Redistributions in binary form must reproduce the above copyright\r
+ *    notice, this list of conditions and the following disclaimer in the\r
+ *    documentation and/or other materials provided with the distribution.\r
+ *\r
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND\r
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE\r
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r
+ * SUCH DAMAGE.\r
+ *\r
+ * $Citrus$\r
+ */\r
+#include  <LibConfig.h>\r
+#include <sys/EfiCdefs.h>\r
+#if defined(LIBC_SCCS) && !defined(lint)\r
+__RCSID("$NetBSD: fwide.c,v 1.3 2005/06/12 05:21:27 lukem Exp $");\r
+#endif /* LIBC_SCCS and not lint */\r
+\r
+#include <assert.h>\r
+#include <stdio.h>\r
+#include <wchar.h>\r
+#include "reentrant.h"\r
+#include "local.h"\r
+\r
+int\r
+fwide(FILE *fp, int mode)\r
+{\r
+  struct wchar_io_data *wcio;\r
+\r
+  _DIAGASSERT(fp != NULL);\r
+\r
+  /*\r
+   * this implementation use only -1, 0, 1\r
+   * for mode value.\r
+   * (we don't need to do this, but\r
+   *  this can make things simpler.)\r
+   */\r
+  if (mode > 0)\r
+    mode = 1;\r
+  else if (mode < 0)\r
+    mode = -1;\r
+\r
+  FLOCKFILE(fp);\r
+  wcio = WCIO_GET(fp);\r
+  if (!wcio)\r
+    return 0; /* XXX */\r
+\r
+  if (wcio->wcio_mode == 0 && mode != 0)\r
+    wcio->wcio_mode = mode;\r
+  else\r
+    mode = wcio->wcio_mode;\r
+  FUNLOCKFILE(fp);\r
+\r
+  return mode;\r
+}\r