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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /fs/isofs/joliet.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fs/isofs/joliet.c')
-rw-r--r--fs/isofs/joliet.c68
1 files changed, 68 insertions, 0 deletions
diff --git a/fs/isofs/joliet.c b/fs/isofs/joliet.c
new file mode 100644
index 000000000..c0f04a1e7
--- /dev/null
+++ b/fs/isofs/joliet.c
@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * 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)
+{
+ struct nls_table *nls;
+ unsigned char len = 0;
+
+ nls = ISOFS_SB(inode->i_sb)->s_nls_iocharset;
+
+ if (!nls) {
+ 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;
+}