/*- * SPDX-License-Identifier: BSD-3-Clause * * 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. * 3. 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 __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include 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, __DECONST(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, __DECONST(const char **, &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); }