Annotation of sys/isofs/cd9660/cd9660_util.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: cd9660_util.c,v 1.7 2003/11/04 21:54:01 mickey Exp $ */
! 2: /* $NetBSD: cd9660_util.c,v 1.12 1997/01/24 00:27:33 cgd Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1994
! 6: * The Regents of the University of California. All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to Berkeley
! 9: * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
! 10: * Support code is derived from software contributed to Berkeley
! 11: * by Atsushi Murai (amurai@spec.co.jp). Joliet support was added by
! 12: * Joachim Kuebart (joki@kuebart.stuttgart.netsurf.de).
! 13: *
! 14: * Redistribution and use in source and binary forms, with or without
! 15: * modification, are permitted provided that the following conditions
! 16: * are met:
! 17: * 1. Redistributions of source code must retain the above copyright
! 18: * notice, this list of conditions and the following disclaimer.
! 19: * 2. Redistributions in binary form must reproduce the above copyright
! 20: * notice, this list of conditions and the following disclaimer in the
! 21: * documentation and/or other materials provided with the distribution.
! 22: * 3. Neither the name of the University nor the names of its contributors
! 23: * may be used to endorse or promote products derived from this software
! 24: * without specific prior written permission.
! 25: *
! 26: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 28: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 29: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 30: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 31: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 32: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 33: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 34: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 35: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 36: * SUCH DAMAGE.
! 37: *
! 38: * @(#)cd9660_util.c 8.3 (Berkeley) 12/5/94
! 39: */
! 40:
! 41: #include <sys/param.h>
! 42: #include <sys/systm.h>
! 43: #include <sys/namei.h>
! 44: #include <sys/resourcevar.h>
! 45: #include <sys/kernel.h>
! 46: #include <sys/file.h>
! 47: #include <sys/stat.h>
! 48: #include <sys/buf.h>
! 49: #include <sys/proc.h>
! 50: #include <sys/conf.h>
! 51: #include <sys/mount.h>
! 52: #include <sys/vnode.h>
! 53: #include <sys/malloc.h>
! 54: #include <sys/dirent.h>
! 55:
! 56: #include <isofs/cd9660/iso.h>
! 57: #include <isofs/cd9660/cd9660_extern.h>
! 58:
! 59: /*
! 60: * XXX: limited support for loading of Unicode
! 61: * conversion routine as a kld at a run-time.
! 62: * Should be removed when native Unicode kernel
! 63: * interfaces have been introduced.
! 64: */
! 65: u_char (*cd9660_wchar2char)(u_int32_t wchar) = NULL;
! 66:
! 67: /*
! 68: * Get one character out of an iso filename
! 69: * Obey joliet_level
! 70: * Return number of bytes consumed
! 71: */
! 72: int
! 73: isochar(isofn, isoend, joliet_level, c)
! 74: const u_char *isofn;
! 75: const u_char *isoend;
! 76: int joliet_level;
! 77: u_char *c;
! 78: {
! 79: *c = *isofn++;
! 80: if (joliet_level == 0 || isofn == isoend)
! 81: /* (00) and (01) are one byte in Joliet, too */
! 82: return 1;
! 83:
! 84: /* No Unicode support yet :-( */
! 85: switch (*c) {
! 86: default:
! 87: *c = '?';
! 88: break;
! 89: case '\0':
! 90: *c = *isofn;
! 91: break;
! 92: }
! 93:
! 94: /* XXX: if Unicode conversion routine is loaded then use it */
! 95: if (cd9660_wchar2char != NULL)
! 96: *c = cd9660_wchar2char((*(isofn - 1) << 8) | *isofn);
! 97:
! 98: return 2;
! 99: }
! 100:
! 101: /*
! 102: * translate and compare a filename
! 103: * returns (fn - isofn)
! 104: * Note: Version number plus ';' may be omitted.
! 105: */
! 106: int
! 107: isofncmp(fn, fnlen, isofn, isolen, joliet_level)
! 108: const u_char *fn, *isofn;
! 109: int fnlen, isolen, joliet_level;
! 110: {
! 111: int i, j;
! 112: u_char c;
! 113: const u_char *fnend = fn + fnlen, *isoend = isofn + isolen;
! 114:
! 115: for (; fn != fnend; fn++) {
! 116: if (isofn == isoend)
! 117: return *fn;
! 118: isofn += isochar(isofn, isoend, joliet_level, &c);
! 119: if (c == ';') {
! 120: if (*fn++ != ';')
! 121: return fn[-1];
! 122: for (i = 0; fn != fnend; i = i * 10 + *fn++ - '0') {
! 123: if (*fn < '0' || *fn > '9') {
! 124: return -1;
! 125: }
! 126: }
! 127: for (j = 0; isofn != isoend; j = j * 10 + c - '0')
! 128: isofn += isochar(isofn, isoend,
! 129: joliet_level, &c);
! 130: return i - j;
! 131: }
! 132: if (((u_char) c) != *fn) {
! 133: if (c >= 'A' && c <= 'Z') {
! 134: if (c + ('a' - 'A') != *fn) {
! 135: if (*fn >= 'a' && *fn <= 'z')
! 136: return *fn - ('a' - 'A') - c;
! 137: else
! 138: return *fn - c;
! 139: }
! 140: } else
! 141: return *fn - c;
! 142: }
! 143: }
! 144: if (isofn != isoend) {
! 145: isofn += isochar(isofn, isoend, joliet_level, &c);
! 146: switch (c) {
! 147: default:
! 148: return -c;
! 149: case '.':
! 150: if (isofn != isoend) {
! 151: isochar(isofn, isoend, joliet_level, &c);
! 152: if (c == ';')
! 153: return 0;
! 154: }
! 155: return -1;
! 156: case ';':
! 157: return 0;
! 158: }
! 159: }
! 160: return 0;
! 161: }
! 162:
! 163: /*
! 164: * translate a filename of length > 0
! 165: */
! 166: void
! 167: isofntrans(infn, infnlen, outfn, outfnlen, original, assoc, joliet_level)
! 168: u_char *infn, *outfn;
! 169: int infnlen;
! 170: u_short *outfnlen;
! 171: int original;
! 172: int assoc;
! 173: int joliet_level;
! 174: {
! 175: int fnidx = 0;
! 176: u_char c, d = '\0', *infnend = infn + infnlen;
! 177:
! 178: if (assoc) {
! 179: *outfn++ = ASSOCCHAR;
! 180: fnidx++;
! 181: }
! 182: for (; infn != infnend; fnidx++) {
! 183: infn += isochar(infn, infnend, joliet_level, &c);
! 184:
! 185: if (!original && c == ';') {
! 186: fnidx -= (d == '.');
! 187: break;
! 188: } else
! 189: *outfn++ = c;
! 190: d = c;
! 191: }
! 192: *outfnlen = fnidx;
! 193: }
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