use signal safe ust_safe_snprintf()

[ust.git] / snprintf / wcio.h

diff --git a/snprintf/wcio.h b/snprintf/wcio.h
new file mode 100644 (file)
index 0000000..1b41ec9
--- /dev/null
+++ b/snprintf/wcio.h
@@ -0,0 +1,81 @@
+/*     $OpenBSD: wcio.h,v 1.1 2005/06/17 20:40:32 espie Exp $  */
+/* $NetBSD: wcio.h,v 1.3 2003/01/18 11:30:00 thorpej Exp $ */
+
+/*-
+ * 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.
+ *
+ * $Citrus$
+ */
+
+#ifndef _WCIO_H_
+#define _WCIO_H_
+
+/* minimal requirement of SUSv2 */
+#define WCIO_UNGETWC_BUFSIZE 1
+
+struct wchar_io_data {
+       mbstate_t wcio_mbstate_in;
+       mbstate_t wcio_mbstate_out;
+
+       wchar_t wcio_ungetwc_buf[WCIO_UNGETWC_BUFSIZE];
+       size_t wcio_ungetwc_inbuf;
+
+       int wcio_mode; /* orientation */
+};
+
+#define WCIO_GET(fp) \
+       (_EXT(fp) ? &(_EXT(fp)->_wcio) : (struct wchar_io_data *)0)
+
+#define _SET_ORIENTATION(fp, mode) \
+do {\
+       struct wchar_io_data *_wcio = WCIO_GET(fp); \
+       if (_wcio && _wcio->wcio_mode == 0) \
+               _wcio->wcio_mode = (mode);\
+} while (0)
+
+/*
+ * WCIO_FREE should be called by fclose
+ */
+#define WCIO_FREE(fp) \
+do {\
+       struct wchar_io_data *_wcio = WCIO_GET(fp); \
+       if (_wcio) { \
+               _wcio->wcio_mode = 0;\
+               _wcio->wcio_ungetwc_inbuf = 0;\
+       } \
+} while (0)
+
+#define WCIO_FREEUB(fp) \
+do {\
+       struct wchar_io_data *_wcio = WCIO_GET(fp); \
+       if (_wcio) { \
+               _wcio->wcio_ungetwc_inbuf = 0;\
+       } \
+} while (0)
+
+#define WCIO_INIT(fp) \
+       memset(WCIO_GET(fp), 0, sizeof(struct wchar_io_data))
+
+#endif /*_WCIO_H_*/