[PATCH] hfs: NLS support
This adds NLS support to HFS. Using the kernel options iocharset and codepage
it's possible to map the disk encoding to a local mapping. If these options
are not used, it falls back to the old direct mapping.
Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/fs/hfs/trans.c b/fs/hfs/trans.c
index fb9720a..e673a88 100644
--- a/fs/hfs/trans.c
+++ b/fs/hfs/trans.c
@@ -9,12 +9,15 @@
* with ':' vs. '/' as the path-element separator.
*/
+#include <linux/types.h>
+#include <linux/nls.h>
+
#include "hfs_fs.h"
/*================ Global functions ================*/
/*
- * hfs_mac2triv()
+ * hfs_mac2asc()
*
* Given a 'Pascal String' (a string preceded by a length byte) in
* the Macintosh character set produce the corresponding filename using
@@ -27,23 +30,58 @@
* 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)
+int hfs_mac2asc(struct super_block *sb, char *out, const struct hfs_name *in)
{
- const char *p;
- char c;
- int i, len;
+ 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;
- len = in->len;
- p = in->name;
- for (i = 0; i < len; i++) {
- c = *p++;
- *out++ = c == '/' ? ':' : c;
+ src = in->name;
+ srclen = in->len;
+ 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;
}
- return i;
+out:
+ return dst - out;
}
/*
- * hfs_triv2mac()
+ * hfs_asc2mac()
*
* Given an ASCII string (not null-terminated) and its length,
* generate the corresponding filename in the Macintosh character set
@@ -54,19 +92,57 @@
* This routine is a inverse to hfs_mac2triv().
* A ':' is replaced by a '/'.
*/
-void hfs_triv2mac(struct hfs_name *out, struct qstr *in)
+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, c;
- int i, len;
+ char *dst;
+ int srclen, dstlen, size;
- out->len = len = min((unsigned int)HFS_NAMELEN, in->len);
src = in->name;
+ srclen = in->len;
dst = out->name;
- for (i = 0; i < len; i++) {
- c = *src++;
- *dst++ = c == ':' ? '/' : c;
+ 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;
}
- for (; i < HFS_NAMELEN; i++)
+out:
+ out->len = dst - (char *)out->name;
+ dstlen = HFS_NAMELEN - out->len;
+ while (--dstlen >= 0)
*dst++ = 0;
}