250 lines
6.0 KiB
C
250 lines
6.0 KiB
C
/* $NetBSD: cd9660_util.c,v 1.6 2005/12/11 12:24:25 christos Exp $ */
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/*-
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* Copyright (c) 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley
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* by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
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* Support code is derived from software contributed to Berkeley
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* by Atsushi Murai (amurai@spec.co.jp).
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)cd9660_util.c 8.3 (Berkeley) 12/5/94
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: cd9660_util.c,v 1.6 2005/12/11 12:24:25 christos Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/namei.h>
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#include <sys/resourcevar.h>
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#include <sys/kernel.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/buf.h>
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#include <sys/proc.h>
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#include <sys/mount.h>
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#include <sys/vnode.h>
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#include <sys/malloc.h>
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#include <sys/dirent.h>
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#include <fs/cd9660/iso.h>
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#include <fs/cd9660/cd9660_extern.h>
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#include <fs/unicode.h>
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static u_int16_t wget(const u_char **, size_t *, int);
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static int wput(u_char *, size_t, u_int16_t, int);
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int cd9660_utf8_joliet = 1;
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/*
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* Get one character out of an iso filename
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* Return number of bytes consumed
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*/
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int
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isochar(isofn, isoend, joliet_level, c)
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const u_char *isofn;
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const u_char *isoend;
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int joliet_level;
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u_int16_t *c;
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{
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*c = isofn[0];
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if (joliet_level == 0 || isofn + 1 == isoend) {
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/* (00) and (01) are one byte in Joliet, too */
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return 1;
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}
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if (cd9660_utf8_joliet) {
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*c = (*c << 8) + isofn[1];
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} else {
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/* characters outside ISO-8859-1 subset replaced with '?' */
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if (*c != 0)
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*c = '?';
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else
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*c = isofn[1];
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}
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return 2;
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}
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/*
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* translate and compare a filename
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* Note: Version number plus ';' may be omitted.
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*/
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int
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isofncmp(fn, fnlen, isofn, isolen, joliet_level)
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const u_char *fn, *isofn;
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size_t fnlen, isolen;
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int joliet_level;
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{
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int i, j;
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u_int16_t fc, ic;
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const u_char *isoend = isofn + isolen;
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while (fnlen > 0) {
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fc = wget(&fn, &fnlen, joliet_level);
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if (isofn == isoend)
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return fc;
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isofn += isochar(isofn, isoend, joliet_level, &ic);
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if (ic == ';') {
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switch (fc) {
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default:
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return fc;
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case 0:
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return 0;
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case ';':
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break;
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}
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fn++;
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for (i = 0; --fnlen >= 0; i = i * 10 + *fn++ - '0') {
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if (*fn < '0' || *fn > '9') {
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return -1;
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}
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}
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for (j = 0; isofn != isoend; j = j * 10 + ic - '0')
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isofn += isochar(isofn, isoend,
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joliet_level, &ic);
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return i - j;
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}
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if (ic != fc) {
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if (ic >= 'A' && ic <= 'Z') {
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if (ic + ('a' - 'A') != fc) {
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if (fc >= 'a' && fc <= 'z')
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fc -= 'a' - 'A';
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return (int) fc - (int) ic;
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}
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} else
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return (int) fc - (int) ic;
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}
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}
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if (isofn != isoend) {
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isofn += isochar(isofn, isoend, joliet_level, &ic);
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switch (ic) {
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default:
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return -1;
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case '.':
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if (isofn != isoend) {
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isochar(isofn, isoend, joliet_level, &ic);
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if (ic == ';')
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return 0;
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}
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return -1;
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case ';':
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return 0;
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}
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}
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return 0;
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}
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/*
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* translate a filename
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*/
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void
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isofntrans(infn, infnlen, outfn, outfnlen, original, casetrans, assoc, joliet_level)
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u_char *infn, *outfn;
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int infnlen;
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u_short *outfnlen;
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int original;
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int casetrans;
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int assoc;
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int joliet_level;
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{
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int fnidx = 0;
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u_char *infnend = infn + infnlen;
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u_int16_t c;
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int sz;
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if (assoc) {
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*outfn++ = ASSOCCHAR;
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fnidx++;
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}
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for(; infn != infnend; fnidx += sz) {
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infn += isochar(infn, infnend, joliet_level, &c);
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if (casetrans && joliet_level == 0 && c >= 'A' && c <= 'Z')
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c = c + ('a' - 'A');
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else if (!original && c == ';') {
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if (fnidx > 0 && outfn[-1] == '.')
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fnidx--;
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break;
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}
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sz = wput(outfn, MAXNAMLEN - fnidx, c, joliet_level);
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if (sz == 0) {
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/* not enough space to write the character */
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if (fnidx < MAXNAMLEN) {
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*outfn = '?';
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fnidx++;
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}
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break;
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}
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outfn += sz;
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}
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*outfnlen = fnidx;
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}
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static u_int16_t
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wget(const u_char **str, size_t *sz, int joliet_level)
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{
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if (joliet_level > 0 && cd9660_utf8_joliet) {
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/* decode UTF-8 sequence */
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return wget_utf8((const char **) str, sz);
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} else {
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/*
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* Raw 8-bit characters without any conversion. For Joliet,
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* this effectively assumes provided file name is using
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* ISO-8859-1 subset.
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*/
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u_int16_t c = *str[0];
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(*str)++;
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return c;
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}
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}
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static int
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wput(u_char *s, size_t n, u_int16_t c, int joliet_level)
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{
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if (joliet_level > 0 && cd9660_utf8_joliet) {
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/* Store Joliet file name encoded into UTF-8 */
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return wput_utf8((char *)s, n, c);
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} else {
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/*
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* Store raw 8-bit characters without any conversion.
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* For Joliet case, this filters the Unicode characters
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* to ISO-8859-1 subset.
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*/
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*s = (u_char)c;
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return 1;
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}
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}
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