Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / hfs / trans.c

diff --git a/kernel/fs/hfs/trans.c b/kernel/fs/hfs/trans.c
new file mode 100644 (file)
index 0000000..b1ce4c7
--- /dev/null
+++ b/kernel/fs/hfs/trans.c
@@ -0,0 +1,150 @@
+/*
+ *  linux/fs/hfs/trans.c
+ *
+ * Copyright (C) 1995-1997  Paul H. Hargrove
+ * This file may be distributed under the terms of the GNU General Public License.
+ *
+ * This file contains routines for converting between the Macintosh
+ * character set and various other encodings.  This includes dealing
+ * with ':' vs. '/' as the path-element separator.
+ */
+
+#include <linux/types.h>
+#include <linux/nls.h>
+
+#include "hfs_fs.h"
+
+/*================ Global functions ================*/
+
+/*
+ * hfs_mac2asc()
+ *
+ * Given a 'Pascal String' (a string preceded by a length byte) in
+ * the Macintosh character set produce the corresponding filename using
+ * the 'trivial' name-mangling scheme, returning the length of the
+ * mangled filename.  Note that the output string is not NULL
+ * terminated.
+ *
+ * The name-mangling works as follows:
+ * The character '/', which is illegal in Linux filenames is replaced
+ * by ':' which never appears in HFS filenames.         All other characters
+ * are passed unchanged from input to output.
+ */
+int hfs_mac2asc(struct super_block *sb, char *out, const struct hfs_name *in)
+{
+       struct nls_table *nls_disk = HFS_SB(sb)->nls_disk;
+       struct nls_table *nls_io = HFS_SB(sb)->nls_io;
+       const char *src;
+       char *dst;
+       int srclen, dstlen, size;
+
+       src = in->name;
+       srclen = in->len;
+       if (srclen > HFS_NAMELEN)
+               srclen = HFS_NAMELEN;
+       dst = out;
+       dstlen = HFS_MAX_NAMELEN;
+       if (nls_io) {
+               wchar_t ch;
+
+               while (srclen > 0) {
+                       if (nls_disk) {
+                               size = nls_disk->char2uni(src, srclen, &ch);
+                               if (size <= 0) {
+                                       ch = '?';
+                                       size = 1;
+                               }
+                               src += size;
+                               srclen -= size;
+                       } else {
+                               ch = *src++;
+                               srclen--;
+                       }
+                       if (ch == '/')
+                               ch = ':';
+                       size = nls_io->uni2char(ch, dst, dstlen);
+                       if (size < 0) {
+                               if (size == -ENAMETOOLONG)
+                                       goto out;
+                               *dst = '?';
+                               size = 1;
+                       }
+                       dst += size;
+                       dstlen -= size;
+               }
+       } else {
+               char ch;
+
+               while (--srclen >= 0)
+                       *dst++ = (ch = *src++) == '/' ? ':' : ch;
+       }
+out:
+       return dst - out;
+}
+
+/*
+ * hfs_asc2mac()
+ *
+ * Given an ASCII string (not null-terminated) and its length,
+ * generate the corresponding filename in the Macintosh character set
+ * using the 'trivial' name-mangling scheme, returning the length of
+ * the mangled filename.  Note that the output string is not NULL
+ * terminated.
+ *
+ * This routine is a inverse to hfs_mac2triv().
+ * A ':' is replaced by a '/'.
+ */
+void hfs_asc2mac(struct super_block *sb, struct hfs_name *out, struct qstr *in)
+{
+       struct nls_table *nls_disk = HFS_SB(sb)->nls_disk;
+       struct nls_table *nls_io = HFS_SB(sb)->nls_io;
+       const char *src;
+       char *dst;
+       int srclen, dstlen, size;
+
+       src = in->name;
+       srclen = in->len;
+       dst = out->name;
+       dstlen = HFS_NAMELEN;
+       if (nls_io) {
+               wchar_t ch;
+
+               while (srclen > 0) {
+                       size = nls_io->char2uni(src, srclen, &ch);
+                       if (size < 0) {
+                               ch = '?';
+                               size = 1;
+                       }
+                       src += size;
+                       srclen -= size;
+                       if (ch == ':')
+                               ch = '/';
+                       if (nls_disk) {
+                               size = nls_disk->uni2char(ch, dst, dstlen);
+                               if (size < 0) {
+                                       if (size == -ENAMETOOLONG)
+                                               goto out;
+                                       *dst = '?';
+                                       size = 1;
+                               }
+                               dst += size;
+                               dstlen -= size;
+                       } else {
+                               *dst++ = ch > 0xff ? '?' : ch;
+                               dstlen--;
+                       }
+               }
+       } else {
+               char ch;
+
+               if (dstlen > srclen)
+                       dstlen = srclen;
+               while (--dstlen >= 0)
+                       *dst++ = (ch = *src++) == ':' ? '/' : ch;
+       }
+out:
+       out->len = dst - (char *)out->name;
+       dstlen = HFS_NAMELEN - out->len;
+       while (--dstlen >= 0)
+               *dst++ = 0;
+}