FreeBSD-5.3/sys/isofs/cd9660/cd9660_util.c
/*-
* Copyright (c) 1994
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley
* by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
* Support code is derived from software contributed to Berkeley
* by Atsushi Murai (amurai@spec.co.jp). Joliet support was added by
* Joachim Kuebart (joki@kuebart.stuttgart.netsurf.de).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)cd9660_util.c 8.3 (Berkeley) 12/5/94
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/isofs/cd9660/cd9660_util.c,v 1.22 2004/04/07 20:46:09 imp Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mount.h>
#include <sys/vnode.h>
#include <sys/iconv.h>
#include <isofs/cd9660/iso.h>
#include <isofs/cd9660/cd9660_mount.h>
extern struct iconv_functions *cd9660_iconv;
/*
* Get one character out of an iso filename
* Obey joliet_level
* Return number of bytes consumed
*/
int
isochar(isofn, isoend, joliet_level, c, clen, flags, handle)
u_char *isofn;
u_char *isoend;
int joliet_level;
u_short *c;
int *clen;
int flags;
void *handle;
{
size_t i, j, len;
char inbuf[3], outbuf[3], *inp, *outp;
*c = *isofn++;
if (clen) *clen = 1;
if (joliet_level == 0 || isofn == isoend)
/* (00) and (01) are one byte in Joliet, too */
return 1;
if (flags & ISOFSMNT_KICONV && cd9660_iconv) {
i = j = len = 2;
inbuf[0]=(char)*(isofn - 1);
inbuf[1]=(char)*isofn;
inbuf[2]='\0';
inp = inbuf;
outp = outbuf;
cd9660_iconv->convchr(handle, (const char **)&inp, &i, &outp, &j);
len -= j;
if (clen) *clen = len;
*c = '\0';
while(len--)
*c |= (*(outp - len - 1) & 0xff) << (len << 3);
} else {
switch (*c) {
default:
*c = '?';
break;
case '\0':
*c = *isofn;
break;
}
}
return 2;
}
/*
* translate and compare a filename
* returns (fn - isofn)
* Note: Version number plus ';' may be omitted.
*/
int
isofncmp(fn, fnlen, isofn, isolen, joliet_level, flags, handle, lhandle)
u_char *fn;
int fnlen;
u_char *isofn;
int isolen;
int joliet_level;
int flags;
void *handle;
void *lhandle;
{
int i, j;
u_short c, d;
u_char *fnend = fn + fnlen, *isoend = isofn + isolen;
for (; fn < fnend; ) {
d = sgetrune(fn, fnend - fn, (char const **)&fn, flags, lhandle);
if (isofn == isoend)
return d;
isofn += isochar(isofn, isoend, joliet_level, &c, NULL, flags, handle);
if (c == ';') {
if (d != ';')
return d;
for (i = 0; fn < fnend; i = i * 10 + *fn++ - '0') {
if (*fn < '0' || *fn > '9') {
return -1;
}
}
for (j = 0; isofn != isoend; j = j * 10 + c - '0')
isofn += isochar(isofn, isoend,
joliet_level, &c,
NULL, flags, handle);
return i - j;
}
if (c != d) {
if (c >= 'A' && c <= 'Z') {
if (c + ('a' - 'A') != d) {
if (d >= 'a' && d <= 'z')
return d - ('a' - 'A') - c;
else
return d - c;
}
} else
return d - c;
}
}
if (isofn != isoend) {
isofn += isochar(isofn, isoend, joliet_level, &c, NULL, flags, handle);
switch (c) {
default:
return -c;
case '.':
if (isofn != isoend) {
isochar(isofn, isoend, joliet_level, &c,
NULL, flags, handle);
if (c == ';')
return 0;
}
return -1;
case ';':
return 0;
}
}
return 0;
}
/*
* translate a filename of length > 0
*/
void
isofntrans(infn, infnlen, outfn, outfnlen, original, assoc, joliet_level, flags, handle)
u_char *infn;
int infnlen;
u_char *outfn;
u_short *outfnlen;
int original;
int assoc;
int joliet_level;
int flags;
void *handle;
{
u_short c, d = '\0';
u_char *outp = outfn, *infnend = infn + infnlen;
int clen;
if (assoc) {
*outp++ = ASSOCCHAR;
}
for (; infn != infnend; ) {
infn += isochar(infn, infnend, joliet_level, &c, &clen, flags, handle);
if (!original && !joliet_level && c >= 'A' && c <= 'Z')
c += ('a' - 'A');
else if (!original && c == ';') {
outp -= (d == '.');
break;
}
d = c;
while(clen--)
*outp++ = c >> (clen << 3);
}
*outfnlen = outp - outfn;
}
/*
* same as sgetrune(3)
*/
u_short
sgetrune(string, n, result, flags, handle)
const char *string;
size_t n;
char const **result;
int flags;
void *handle;
{
size_t i, j, len;
char outbuf[3], *outp;
u_short c = '\0';
len = i = (n < 2) ? n : 2;
j = 2;
outp = outbuf;
if (flags & ISOFSMNT_KICONV && cd9660_iconv) {
cd9660_iconv->convchr(handle, (const char **)&string,
&i, &outp, &j);
len -= i;
} else {
len = 1;
string++;
}
if (result) *result = string;
while(len--) c |= (*(string - len - 1) & 0xff) << (len << 3);
return (c);
}