1 files changed, 72 insertions, 0 deletions

diff --git a/fs/hfs/trans.c b/fs/hfs/trans.c
new file mode 100644
index 000000000000..fb9720abbadd
--- /dev/null
+++ b/fs/hfs/trans.c
@@ -0,0 +1,72 @@
+/*
+ *  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 "hfs_fs.h"
+
+/*================ Global functions ================*/
+
+/*
+ * hfs_mac2triv()
+ *
+ * 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_mac2triv(char *out, const struct hfs_name *in)
+{
+        const char *p;
+        char c;
+        int i, len;
+
+        len = in->len;
+        p = in->name;
+        for (i = 0; i < len; i++) {
+                c = *p++;
+                *out++ = c == '/' ? ':' : c;
+        }
+        return i;
+}
+
+/*
+ * hfs_triv2mac()
+ *
+ * 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_triv2mac(struct hfs_name *out, struct qstr *in)
+{
+        const char *src;
+        char *dst, c;
+        int i, len;
+
+        out->len = len = min((unsigned int)HFS_NAMELEN, in->len);
+        src = in->name;
+        dst = out->name;
+        for (i = 0; i < len; i++) {
+                c = *src++;
+                *dst++ = c == ':' ? '/' : c;
+        }
+        for (; i < HFS_NAMELEN; i++)
+                *dst++ = 0;
+}