Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / isofs / joliet.c

diff --git a/kernel/fs/isofs/joliet.c b/kernel/fs/isofs/joliet.c
new file mode 100644 (file)
index 0000000..a048de8
--- /dev/null
+++ b/kernel/fs/isofs/joliet.c
@@ -0,0 +1,69 @@
+/*
+ *  linux/fs/isofs/joliet.c
+ *
+ *  (C) 1996 Gordon Chaffee
+ *
+ *  Joliet: Microsoft's Unicode extensions to iso9660
+ */
+
+#include <linux/types.h>
+#include <linux/nls.h>
+#include "isofs.h"
+
+/*
+ * Convert Unicode 16 to UTF-8 or ASCII.
+ */
+static int
+uni16_to_x8(unsigned char *ascii, __be16 *uni, int len, struct nls_table *nls)
+{
+       __be16 *ip, ch;
+       unsigned char *op;
+
+       ip = uni;
+       op = ascii;
+
+       while ((ch = get_unaligned(ip)) && len) {
+               int llen;
+               llen = nls->uni2char(be16_to_cpu(ch), op, NLS_MAX_CHARSET_SIZE);
+               if (llen > 0)
+                       op += llen;
+               else
+                       *op++ = '?';
+               ip++;
+
+               len--;
+       }
+       *op = 0;
+       return (op - ascii);
+}
+
+int
+get_joliet_filename(struct iso_directory_record * de, unsigned char *outname, struct inode * inode)
+{
+       unsigned char utf8;
+       struct nls_table *nls;
+       unsigned char len = 0;
+
+       utf8 = ISOFS_SB(inode->i_sb)->s_utf8;
+       nls = ISOFS_SB(inode->i_sb)->s_nls_iocharset;
+
+       if (utf8) {
+               len = utf16s_to_utf8s((const wchar_t *) de->name,
+                               de->name_len[0] >> 1, UTF16_BIG_ENDIAN,
+                               outname, PAGE_SIZE);
+       } else {
+               len = uni16_to_x8(outname, (__be16 *) de->name,
+                               de->name_len[0] >> 1, nls);
+       }
+       if ((len > 2) && (outname[len-2] == ';') && (outname[len-1] == '1'))
+               len -= 2;
+
+       /*
+        * Windows doesn't like periods at the end of a name,
+        * so neither do we
+        */
+       while (len >= 2 && (outname[len-1] == '.'))
+               len--;
+
+       return len;
+}