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authorDana Robinson <derobins@hdfgroup.org>2019-03-15 07:41:39 (GMT)
committerDana Robinson <derobins@hdfgroup.org>2019-03-15 07:41:39 (GMT)
commit750b5c293076b6a446088fa3020e4e0787d489d7 (patch)
tree80f392f7152d137a64aa28c0de84554beb066740 /src/H5system.c
parent0ea7aa89ff872f810285b12ddde5d55165534afa (diff)
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Adds _wopen support on Windows so that files with UTF-8 names
can be opened. Fixes: HDFFV-2714, HDFFV-3914, HDFFV-3895, HDFFV-8237, HDFFV-10413, HDFFV-10691
Diffstat (limited to 'src/H5system.c')
-rw-r--r--src/H5system.c126
1 files changed, 126 insertions, 0 deletions
diff --git a/src/H5system.c b/src/H5system.c
index f47d057..2ddc29a 100644
--- a/src/H5system.c
+++ b/src/H5system.c
@@ -985,6 +985,132 @@ Wroundf(float arg)
return (float)(arg < 0.0F ? HDceil(arg - 0.5F) : HDfloor(arg + 0.5F));
}
+/*-------------------------------------------------------------------------
+* Function: H5_get_utf16_str
+*
+* Purpose: Gets a UTF-16 string from an UTF-8 (or ASCII) string.
+*
+* Return: Success: A pointer to a UTF-16 string
+* This must be freed by the caller using H5MM_xfree()
+* Failure: NULL
+*
+* Programmer: Dana Robinson
+* Spring 2019
+*
+*-------------------------------------------------------------------------
+*/
+const wchar_t *
+H5_get_utf16_str(const char *s)
+{
+ int nwchars = -1; /* Length of the UTF-16 buffer */
+ wchar_t *ret_s = NULL; /* UTF-16 version of the string */
+
+ /* Get the number of UTF-16 characters needed */
+ if(0 == (nwchars = MultiByteToWideChar(CP_UTF8, 0, s, -1, NULL, 0)))
+ goto error;
+
+ /* Allocate a buffer for the UTF-16 string */
+ if(NULL == (ret_s = (wchar_t *)H5MM_calloc(sizeof(wchar_t) * (size_t)nwchars)))
+ goto error;
+
+ /* Convert the input UTF-8 string to UTF-16 */
+ if(0 == MultiByteToWideChar(CP_UTF8, 0, s, -1, ret_s, nwchars))
+ goto error;
+
+ return ret_s;
+
+error:
+ if(ret_s)
+ H5MM_xfree((void *)ret_s);
+ return NULL;
+} /* end H5_get_utf16_str() */
+
+/*-------------------------------------------------------------------------
+ * Function: Wopen_utf8
+ *
+ * Purpose: UTF-8 equivalent of open(2) for use on Windows.
+ * Converts a UTF-8 input path to UTF-16 and then opens the
+ * file via _wopen() under the hood
+ *
+ * Return: Success: A POSIX file descriptor
+ * Failure: -1
+ *
+ * Programmer: Dana Robinson
+ * Spring 2019
+ *
+ *-------------------------------------------------------------------------
+ */
+int
+Wopen_utf8(const char *path, int oflag, ...)
+{
+ int fd = -1; /* POSIX file descriptor to be returned */
+ wchar_t *wpath = NULL; /* UTF-16 version of the path */
+ int pmode = 0; /* mode (optionally set via variable args) */
+
+ /* Convert the input UTF-8 path to UTF-16 */
+ if(NULL == (wpath = H5_get_utf16_str(path)))
+ goto done;
+
+ /* _O_BINARY must be set in Windows to avoid CR-LF <-> LF EOL
+ * transformations when performing I/O. Note that this will
+ * produce Unix-style text files, though.
+ */
+ oflag |= _O_BINARY;
+
+ /* Get the mode, if O_CREAT was specified */
+ if(oflag & O_CREAT) {
+ va_list vl;
+
+ HDva_start(vl, oflag);
+ pmode = HDva_arg(vl, int);
+ HDva_end(vl);
+ }
+
+ /* Open the file */
+ fd = _wopen(wpath, oflag, pmode);
+
+done:
+ if(wpath)
+ H5MM_xfree((void *)wpath);
+
+ return fd;
+} /* end Wopen_utf8() */
+
+/*-------------------------------------------------------------------------
+ * Function: Wremove_utf8
+ *
+ * Purpose: UTF-8 equivalent of remove(3) for use on Windows.
+ * Converts a UTF-8 input path to UTF-16 and then opens the
+ * file via _wremove() under the hood
+ *
+ * Return: Success: 0
+ * Failure: -1
+ *
+ * Programmer: Dana Robinson
+ * Spring 2019
+ *
+ *-------------------------------------------------------------------------
+ */
+int
+Wremove_utf8(const char *path)
+{
+ wchar_t *wpath = NULL; /* UTF-16 version of the path */
+ int ret;
+
+ /* Convert the input UTF-8 path to UTF-16 */
+ if(NULL == (wpath = H5_get_utf16_str(path)))
+ goto done;
+
+ /* Open the file */
+ ret = _wremove(wpath);
+
+done:
+ if(wpath)
+ H5MM_xfree((void *)wpath);
+
+ return ret;
+} /* end Wremove_utf8() */
+
#endif /* H5_HAVE_WIN32_API */