https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 88026842b0a760145aa71d69e74fbc9ec118ca44 authored by Linus Torvalds on 03 January 2006, 03:21:10 UTC
Linux v2.6.15
Linux v2.6.15
Tip revision: 8802684
joliet.c
/*
* 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 UTF8 or ASCII.
*/
static int
uni16_to_x8(unsigned char *ascii, u16 *uni, int len, struct nls_table *nls)
{
wchar_t *ip, ch;
unsigned char *op;
ip = uni;
op = ascii;
while ((ch = get_unaligned(ip)) && len) {
int llen;
ch = be16_to_cpu(ch);
if ((llen = nls->uni2char(ch, op, NLS_MAX_CHARSET_SIZE)) > 0)
op += llen;
else
*op++ = '?';
ip++;
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, unsigned char *outname, struct inode * inode)
{
unsigned char utf8;
struct nls_table *nls;
unsigned char len = 0;
utf8 = ISOFS_SB(inode->i_sb)->s_utf8;
nls = ISOFS_SB(inode->i_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, (u16 *) 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;
}