Annotation of sys/ntfs/ntfs_conv.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: ntfs_conv.c,v 1.3 2005/04/20 21:02:41 brad Exp $ */
! 2: /* $NetBSD: ntfs_conv.c,v 1.1 2002/12/23 17:38:32 jdolecek Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 2001 The NetBSD Foundation, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: * 3. All advertising materials mentioning features or use of this software
! 17: * must display the following acknowledgement:
! 18: * This product includes software developed by the NetBSD
! 19: * Foundation, Inc. and its contributors.
! 20: * 4. Neither the name of The NetBSD Foundation nor the names of its
! 21: * contributors may be used to endorse or promote products derived
! 22: * from this software without specific prior written permission.
! 23: *
! 24: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 25: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 26: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 27: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 28: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 29: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 30: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 31: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 32: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 33: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 34: * POSSIBILITY OF SUCH DAMAGE.
! 35: */
! 36:
! 37: /*
! 38: * File name recode stuff.
! 39: *
! 40: * The utf-8 routines were derived from src/lib/libc/locale/utf2.c.
! 41: */
! 42:
! 43: #include <sys/cdefs.h>
! 44: #ifdef __KERNEL_RCSID
! 45: __KERNEL_RCSID(0, "$NetBSD: ntfs_conv.c,v 1.1 2002/12/23 17:38:32 jdolecek Exp $");
! 46: #endif
! 47:
! 48: #include <sys/param.h>
! 49: #include <sys/systm.h>
! 50: #include <sys/namei.h>
! 51: #include <sys/proc.h>
! 52: #include <sys/kernel.h>
! 53: #include <sys/vnode.h>
! 54: #include <sys/mount.h>
! 55: #include <sys/buf.h>
! 56: #include <sys/file.h>
! 57: #include <sys/malloc.h>
! 58: #include <sys/lock.h>
! 59: #if defined(__FreeBSD__)
! 60: #include <machine/clock.h>
! 61: #endif
! 62:
! 63: #include <miscfs/specfs/specdev.h>
! 64:
! 65: /* #define NTFS_DEBUG 1 */
! 66: #if defined(__FreeBSD__) || defined(__NetBSD__)
! 67: #include <fs/ntfs/ntfs.h>
! 68: #include <fs/ntfs/ntfsmount.h>
! 69: #include <fs/ntfs/ntfs_inode.h>
! 70: #include <fs/ntfs/ntfs_vfsops.h>
! 71: #include <fs/ntfs/ntfs_subr.h>
! 72: #include <fs/ntfs/ntfs_compr.h>
! 73: #include <fs/ntfs/ntfs_ihash.h>
! 74: #else
! 75: #include <ntfs/ntfs.h>
! 76: #include <ntfs/ntfsmount.h>
! 77: #include <ntfs/ntfs_inode.h>
! 78: #include <ntfs/ntfs_vfsops.h>
! 79: #include <ntfs/ntfs_subr.h>
! 80: #include <ntfs/ntfs_compr.h>
! 81: #include <ntfs/ntfs_ihash.h>
! 82: #endif
! 83:
! 84: /* UTF-8 encoding stuff */
! 85:
! 86: static const int _utf_count[16] = {
! 87: 1, 1, 1, 1, 1, 1, 1, 1,
! 88: 0, 0, 0, 0, 2, 2, 3, 0,
! 89: };
! 90:
! 91: /*
! 92: * Read one wide character off the string, shift the string pointer
! 93: * and return the character.
! 94: */
! 95: wchar
! 96: ntfs_utf8_wget(const char **str)
! 97: {
! 98: int c;
! 99: wchar rune = 0;
! 100: const char *s = *str;
! 101:
! 102: c = _utf_count[(s[0] >> 4) & 0xf];
! 103: if (c == 0) {
! 104: c = 1;
! 105: goto encoding_error;
! 106: }
! 107:
! 108: switch (c) {
! 109: case 1:
! 110: rune = s[0] & 0xff;
! 111: break;
! 112: case 2:
! 113: if ((s[1] & 0xc0) != 0x80)
! 114: goto encoding_error;
! 115: rune = ((s[0] & 0x1F) << 6) | (s[1] & 0x3F);
! 116: break;
! 117: case 3:
! 118: if ((s[1] & 0xC0) != 0x80 || (s[2] & 0xC0) != 0x80)
! 119: goto encoding_error;
! 120: rune = ((s[0] & 0x1F) << 12) | ((s[1] & 0x3F) << 6)
! 121: | (s[2] & 0x3F);
! 122: break;
! 123: }
! 124:
! 125: encoding_error:
! 126: *str = *str + c;
! 127: return rune;
! 128: }
! 129:
! 130: /*
! 131: * Encode wide character and write it to the string. 'n' specifies
! 132: * how much space there is in the string. Returns number of bytes written
! 133: * to the target string.
! 134: */
! 135: int
! 136: ntfs_utf8_wput(char *s, size_t n, wchar wc)
! 137: {
! 138: if (wc & 0xf800) {
! 139: if (n < 3) {
! 140: /* bound check failure */
! 141: ddprintf(("ntfs_utf8_wput: need 3 bytes\n"));
! 142: return 0;
! 143: }
! 144:
! 145: s[0] = 0xE0 | ((wc >> 12) & 0x0F);
! 146: s[1] = 0x80 | ((wc >> 6) & 0x3F);
! 147: s[2] = 0x80 | ((wc) & 0x3F);
! 148: return 3;
! 149: } else {
! 150: if (wc & 0x0780) {
! 151: if (n < 2) {
! 152: /* bound check failure */
! 153: ddprintf(("ntfs_utf8_wput: need 2 bytes\n"));
! 154: return 0;
! 155: }
! 156:
! 157: s[0] = 0xC0 | ((wc >> 6) & 0x1F);
! 158: s[1] = 0x80 | ((wc) & 0x3F);
! 159: return 2;
! 160: } else {
! 161: if (n < 1) {
! 162: /* bound check failure */
! 163: ddprintf(("ntfs_utf8_wput: need 1 byte\n"));
! 164: return 0;
! 165: }
! 166:
! 167: s[0] = wc;
! 168: return 1;
! 169: }
! 170: }
! 171: }
! 172:
! 173: /*
! 174: * Compare two wide characters, returning 1, 0, -1 if the first is
! 175: * bigger, equal or lower than the second.
! 176: */
! 177: int
! 178: ntfs_utf8_wcmp(wchar wc1, wchar wc2)
! 179: {
! 180: /* no conversions needed for utf8 */
! 181:
! 182: if (wc1 == wc2)
! 183: return 0;
! 184: else
! 185: return (int) wc1 - (int) wc2;
! 186: }
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