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authormarcin.slusarz@gmail.com <marcin.slusarz@gmail.com>2008-01-30 22:03:51 +0100
committerJan Kara <jack@suse.cz>2008-04-17 14:22:23 +0200
commit79cfe0ff5fb585b92126365a2881262945ac0ee9 (patch)
tree02896a68c64d83536f4cfb52557fe6e508f6fe5f /fs/udf/unicode.c
parentb8145a769765ce9688eb84080d4c48b22a3553f2 (diff)
downloadlinux-79cfe0ff5fb585b92126365a2881262945ac0ee9.tar.bz2
udf: udf_CS0toUTF8 cleanup
- fix error handling - always zero output variable - don't zero explicitely fields zeroed by memset - mark "in" paramater as const - remove outdated comment Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/udf/unicode.c')
-rw-r--r--fs/udf/unicode.c27
1 files changed, 10 insertions, 17 deletions
diff --git a/fs/udf/unicode.c b/fs/udf/unicode.c
index b9de050ad830..05bc505ec01a 100644
--- a/fs/udf/unicode.c
+++ b/fs/udf/unicode.c
@@ -82,9 +82,6 @@ static int udf_build_ustr_exact(struct ustr *dest, dstring *ptr, int exactsize)
* PURPOSE
* Convert OSTA Compressed Unicode to the UTF-8 equivalent.
*
- * DESCRIPTION
- * This routine is only called by udf_filldir().
- *
* PRE-CONDITIONS
* utf Pointer to UTF-8 output buffer.
* ocu Pointer to OSTA Compressed Unicode input buffer
@@ -98,43 +95,39 @@ static int udf_build_ustr_exact(struct ustr *dest, dstring *ptr, int exactsize)
* November 12, 1997 - Andrew E. Mileski
* Written, tested, and released.
*/
-int udf_CS0toUTF8(struct ustr *utf_o, struct ustr *ocu_i)
+int udf_CS0toUTF8(struct ustr *utf_o, const struct ustr *ocu_i)
{
- uint8_t *ocu;
- uint32_t c;
+ const uint8_t *ocu;
uint8_t cmp_id, ocu_len;
int i;
- ocu = ocu_i->u_name;
-
ocu_len = ocu_i->u_len;
- cmp_id = ocu_i->u_cmpID;
- utf_o->u_len = 0;
-
if (ocu_len == 0) {
memset(utf_o, 0, sizeof(struct ustr));
- utf_o->u_cmpID = 0;
- utf_o->u_len = 0;
return 0;
}
- if ((cmp_id != 8) && (cmp_id != 16)) {
+ cmp_id = ocu_i->u_cmpID;
+ if (cmp_id != 8 && cmp_id != 16) {
+ memset(utf_o, 0, sizeof(struct ustr));
printk(KERN_ERR "udf: unknown compression code (%d) stri=%s\n",
cmp_id, ocu_i->u_name);
return 0;
}
+ ocu = ocu_i->u_name;
+ utf_o->u_len = 0;
for (i = 0; (i < ocu_len) && (utf_o->u_len <= (UDF_NAME_LEN - 3));) {
/* Expand OSTA compressed Unicode to Unicode */
- c = ocu[i++];
+ uint32_t c = ocu[i++];
if (cmp_id == 16)
c = (c << 8) | ocu[i++];
/* Compress Unicode to UTF-8 */
- if (c < 0x80U) {
+ if (c < 0x80U)
utf_o->u_name[utf_o->u_len++] = (uint8_t)c;
- } else if (c < 0x800U) {
+ else if (c < 0x800U) {
utf_o->u_name[utf_o->u_len++] =
(uint8_t)(0xc0 | (c >> 6));
utf_o->u_name[utf_o->u_len++] =