1 files changed, 110 insertions, 0 deletions
diff --git a/fs/isofs/joliet.c b/fs/isofs/joliet.c
new file mode 100644
index 000000000..c34bfef76
--- /dev/null
+++ b/fs/isofs/joliet.c
@@ -0,0 +1,110 @@
+/*
+ *  linux/fs/isofs/joliet.c
+ *
+ *  (C) 1996 Gordon Chaffee
+ *
+ *  Joliet: Microsoft's Unicode extensions to iso9660
+ */
+
+#include <linux/string.h>
+#include <linux/nls.h>
+#include <linux/malloc.h>
+#include <linux/iso_fs.h>
+
+/*
+ * Convert Unicode 16 to UTF8 or ascii.
+ */
+static int
+uni16_to_x8(unsigned char *ascii, unsigned char *uni, int len,
+	    struct nls_table *nls)
+{
+	unsigned char *ip, *op;
+	unsigned char ch, cl;
+	unsigned char *uni_page;
+
+	ip = uni;
+	op = ascii;
+
+	while ((*ip || ip[1]) && len) {
+		ch = *ip++;
+		cl = *ip++;
+
+		uni_page = nls->page_uni2charset[ch];
+		if (uni_page && uni_page[cl]) {
+			*op++ = uni_page[cl];
+		} else {
+			*op++ = '?';
+		}
+		len--;
+	}
+	*op = 0;
+	return (op - ascii);
+}
+
+/* Convert big endian wide character string to utf8 */
+static int
+wcsntombs_be(__u8 *s, const __u8 *pwcs, int inlen, int maxlen)
+{
+	const __u8 *ip;
+	__u8 *op;
+	int size;
+	__u16 c;
+
+	op = s;
+	ip = pwcs;
+	while ((*ip || ip[1]) && (maxlen > 0) && (inlen > 0)) {
+		c = (*ip << 8) | ip[1];
+		if (c > 0x7f) {
+			size = utf8_wctomb(op, c, maxlen);
+			if (size == -1) {
+				/* Ignore character and move on */
+				maxlen--;
+			} else {
+				op += size;
+				maxlen -= size;
+			}
+		} else {
+			*op++ = (__u8) c;
+		}
+		ip += 2;
+		inlen--;
+	}
+	return (op - s);
+}
+
+int
+get_joliet_filename(struct iso_directory_record * de, struct inode * inode,
+		    unsigned char *outname)
+{
+	unsigned char utf8;
+	struct nls_table *nls;
+	unsigned char len = 0;
+	int i;
+	char c;
+
+	utf8 = inode->i_sb->u.isofs_sb.s_utf8;
+	nls = inode->i_sb->u.isofs_sb.s_nls_iocharset;
+
+	if (utf8) {
+		len = wcsntombs_be(outname, de->name,
+				   de->name_len[0] >> 1, PAGE_SIZE);
+	} else {
+		len = uni16_to_x8(outname, de->name,
+				  de->name_len[0] >> 1, nls);
+	}
+	if ((len > 2) && (outname[len-2] == ';') && (outname[len-1] == '1')) {
+		len -= 2;
+	}
+
+        if (inode->i_sb->u.isofs_sb.s_name_check == 'r') {
+               for (i = 0; i < len; i++) {
+                       c = outname[i];
+                       /* lower case */
+                       if (c >= 'A' && c <= 'Z') c |= 0x20;
+                       if (c == ';') c = '.';
+                       outname[i] = c;
+               }
+	}
+
+	return len;
+}