bsd/hfs/hfs_encodings.c

   1 /*
   2  * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 #if HFS
  29
  30 #include <sys/param.h>
  31 #include <sys/systm.h>
  32 #include <sys/kernel.h>
  33 #include <sys/malloc.h>
  34 #include <sys/queue.h>
  35 #include <sys/utfconv.h>
  36 #include <kern/host.h>
  37 #include <mach/host_priv.h>
  38 #include <libkern/OSKextLib.h>
  39 #include <libkern/OSKextLibPrivate.h>
  40
  41 #include "hfs.h"
  42
  43
  44 lck_grp_t * encodinglst_lck_grp;
  45 lck_grp_attr_t * encodinglst_lck_grp_attr;
  46 lck_attr_t * encodinglst_lck_attr;
  47
  48
  49 /* hfs encoding converter list */
  50 SLIST_HEAD(encodinglst, hfs_encoding) hfs_encoding_list = {0};
  51
  52 lck_mtx_t  encodinglst_mutex;
  53
  54
  55
  56 /* hfs encoding converter entry */
  57 struct  hfs_encoding {
  58         SLIST_ENTRY(hfs_encoding)  link;
  59         int                     refcount;
  60         int                     kmod_id;
  61         u_int32_t       encoding;
  62         hfs_to_unicode_func_t   get_unicode_func;
  63         unicode_to_hfs_func_t   get_hfsname_func;
  64 };
  65
  66 #define MAX_HFS_UNICODE_CHARS   (15*5)
  67
  68 static int unicode_to_mac_roman(UniChar *uni_str, u_int32_t unicodeChars, Str31 hfs_str);
  69
  70 void
  71 hfs_converterinit(void)
  72 {
  73         SLIST_INIT(&hfs_encoding_list);
  74
  75         encodinglst_lck_grp_attr= lck_grp_attr_alloc_init();
  76         encodinglst_lck_grp  = lck_grp_alloc_init("cnode_hash", encodinglst_lck_grp_attr);
  77         encodinglst_lck_attr = lck_attr_alloc_init();
  78
  79         lck_mtx_init(&encodinglst_mutex, encodinglst_lck_grp, encodinglst_lck_attr);
  80
  81         /*
  82          * add resident MacRoman converter and take a reference
  83          * since its always "loaded".
  84          */
  85         hfs_addconverter(0, kTextEncodingMacRoman, mac_roman_to_unicode, unicode_to_mac_roman);
  86         SLIST_FIRST(&hfs_encoding_list)->refcount++;
  87 }
  88
  89
  90 /*
  91  * hfs_addconverter - add an HFS encoding converter
  92  *
  93  * This is called exclusivly by kernel loadable modules
  94  * (like HFS_Japanese.kmod) to register hfs encoding
  95  * conversion routines.
  96  *
  97  */
  98 int
  99 hfs_addconverter(int id, u_int32_t encoding, hfs_to_unicode_func_t get_unicode, unicode_to_hfs_func_t get_hfsname)
 100 {
 101         struct hfs_encoding *encp;
 102
 103         MALLOC(encp, struct hfs_encoding *, sizeof(struct hfs_encoding), M_TEMP, M_WAITOK);
 104
 105         lck_mtx_lock(&encodinglst_mutex);
 106
 107         encp->link.sle_next = NULL;
 108         encp->refcount = 0;
 109         encp->encoding = encoding;
 110         encp->get_unicode_func = get_unicode;
 111         encp->get_hfsname_func = get_hfsname;
 112         encp->kmod_id = id;
 113         SLIST_INSERT_HEAD(&hfs_encoding_list, encp, link);
 114
 115         lck_mtx_unlock(&encodinglst_mutex);
 116         return (0);
 117 }
 118
 119
 120 /*
 121  * hfs_remconverter - remove an HFS encoding converter
 122  *
 123  * Can be called by a kernel loadable module's finalize
 124  * routine to remove an encoding converter so that the
 125  * module (i.e. the code) can be unloaded.
 126  *
 127  * However, in the normal case, the removing and unloading
 128  * of these converters is done in hfs_relconverter.
 129  * The call is initiated from within the kernel during the unmounting of an hfs voulume.
 130  */
 131 int
 132 hfs_remconverter(int id, u_int32_t encoding)
 133 {
 134         struct hfs_encoding *encp;
 135
 136         lck_mtx_lock(&encodinglst_mutex);
 137         SLIST_FOREACH(encp, &hfs_encoding_list, link) {
 138                 if (encp->encoding == encoding && encp->kmod_id == id) {
 139                         encp->refcount--;
 140
 141                         /* if converter is no longer in use, release it */
 142                         if (encp->refcount <= 0 && encp->kmod_id != 0) {
 143                                 SLIST_REMOVE(&hfs_encoding_list, encp, hfs_encoding, link);
 144                                 lck_mtx_unlock(&encodinglst_mutex);
 145                                 FREE(encp, M_TEMP);
 146                                 return (0);
 147                         } else {
 148                                 lck_mtx_unlock(&encodinglst_mutex);
 149                                 return (1);   /* busy */
 150                         }
 151                         break;
 152                 }
 153         }
 154         lck_mtx_unlock(&encodinglst_mutex);
 155
 156         return (0);
 157 }
 158
 159
 160 /*
 161  * hfs_getconverter - get HFS encoding converters
 162  *
 163  * Normally called during the mounting of an hfs voulume.
 164  */
 165 int
 166 hfs_getconverter(u_int32_t encoding, hfs_to_unicode_func_t *get_unicode, unicode_to_hfs_func_t *get_hfsname)
 167 {
 168         struct hfs_encoding *encp;
 169         int found = 0;
 170
 171         lck_mtx_lock(&encodinglst_mutex);
 172         SLIST_FOREACH(encp, &hfs_encoding_list, link) {
 173                 if (encp->encoding == encoding) {
 174                         found = 1;
 175                         *get_unicode = encp->get_unicode_func;
 176                         *get_hfsname = encp->get_hfsname_func;
 177                         ++encp->refcount;
 178                         break;
 179                 }
 180         }
 181         lck_mtx_unlock(&encodinglst_mutex);
 182
 183         if (!found) {
 184                 *get_unicode = NULL;
 185                 *get_hfsname = NULL;
 186                 return (EINVAL);
 187         }
 188
 189         return (0);
 190 }
 191
 192
 193 /*
 194  * hfs_relconverter - release interest in an HFS encoding converter
 195  *
 196  * Normally called during the unmounting of an hfs voulume.
 197  */
 198 int
 199 hfs_relconverter(u_int32_t encoding)
 200 {
 201         struct hfs_encoding *encp;
 202
 203         lck_mtx_lock(&encodinglst_mutex);
 204         SLIST_FOREACH(encp, &hfs_encoding_list, link) {
 205                 if (encp->encoding == encoding) {
 206                         encp->refcount--;
 207
 208                         /* if converter is no longer in use, release it */
 209                         if (encp->refcount <= 0 && encp->kmod_id != 0) {
 210                                 uint32_t loadTag = (uint32_t)encp->kmod_id;
 211
 212                                 SLIST_REMOVE(&hfs_encoding_list, encp, hfs_encoding, link);
 213                                 lck_mtx_unlock(&encodinglst_mutex);
 214
 215                                 FREE(encp, M_TEMP);
 216                                 (void)OSKextUnloadKextWithLoadTag(loadTag);
 217                                 return (0);
 218                         }
 219                         lck_mtx_unlock(&encodinglst_mutex);
 220                         return (0);
 221                 }
 222         }
 223         lck_mtx_unlock(&encodinglst_mutex);
 224
 225         return (EINVAL);
 226 }
 227
 228
 229 /*
 230  * Convert HFS encoded string into UTF-8
 231  *
 232  * Unicode output is fully decomposed
 233  * '/' chars are converted to ':'
 234  */
 235 int
 236 hfs_to_utf8(ExtendedVCB *vcb, const Str31 hfs_str, ByteCount maxDstLen, ByteCount *actualDstLen, unsigned char* dstStr)
 237 {
 238         int error;
 239         UniChar uniStr[MAX_HFS_UNICODE_CHARS];
 240         ItemCount uniCount;
 241         size_t utf8len;
 242         hfs_to_unicode_func_t hfs_get_unicode = VCBTOHFS(vcb)->hfs_get_unicode;
 243
 244         error = hfs_get_unicode(hfs_str, uniStr, MAX_HFS_UNICODE_CHARS, &uniCount);
 245
 246         if (uniCount == 0)
 247                 error = EINVAL;
 248
 249         if (error == 0) {
 250                 error = utf8_encodestr(uniStr, uniCount * sizeof(UniChar), dstStr, &utf8len, maxDstLen , ':', 0);
 251                 if (error == ENAMETOOLONG)
 252                         *actualDstLen = utf8_encodelen(uniStr, uniCount * sizeof(UniChar), ':', 0);
 253                 else
 254                         *actualDstLen = utf8len;
 255         }
 256
 257         return error;
 258 }
 259
 260
 261 /*
 262  * When an HFS name cannot be encoded with the current
 263  * volume encoding then MacRoman is used as a fallback.
 264  */
 265 int
 266 mac_roman_to_utf8(const Str31 hfs_str, ByteCount maxDstLen, ByteCount *actualDstLen, unsigned char* dstStr)
 267 {
 268         int error;
 269         UniChar uniStr[MAX_HFS_UNICODE_CHARS];
 270         ItemCount uniCount;
 271         size_t utf8len;
 272
 273         error = mac_roman_to_unicode(hfs_str, uniStr, MAX_HFS_UNICODE_CHARS, &uniCount);
 274
 275         if (uniCount == 0)
 276                 error = EINVAL;
 277
 278         if (error == 0) {
 279                 error = utf8_encodestr(uniStr, uniCount * sizeof(UniChar), dstStr, &utf8len, maxDstLen , ':', 0);
 280                 if (error == ENAMETOOLONG)
 281                         *actualDstLen = utf8_encodelen(uniStr, uniCount * sizeof(UniChar), ':', 0);
 282                 else
 283                         *actualDstLen = utf8len;
 284         }
 285
 286         return error;
 287 }
 288
 289
 290 /*
 291  * Convert Unicode string into HFS encoding
 292  *
 293  * ':' chars are converted to '/'
 294  * Assumes input represents fully decomposed Unicode
 295  */
 296 int
 297 unicode_to_hfs(ExtendedVCB *vcb, ByteCount srcLen, u_int16_t* srcStr, Str31 dstStr, int retry)
 298 {
 299         int error;
 300         unicode_to_hfs_func_t hfs_get_hfsname = VCBTOHFS(vcb)->hfs_get_hfsname;
 301
 302         error = hfs_get_hfsname(srcStr, srcLen/sizeof(UniChar), dstStr);
 303         if (error && retry) {
 304                 error = unicode_to_mac_roman(srcStr, srcLen/sizeof(UniChar), dstStr);
 305         }
 306         return error;
 307 }
 308
 309 /*
 310  * Convert UTF-8 string into HFS encoding
 311  *
 312  * ':' chars are converted to '/'
 313  * Assumes input represents fully decomposed Unicode
 314  */
 315 int
 316 utf8_to_hfs(ExtendedVCB *vcb, ByteCount srcLen, const unsigned char* srcStr, Str31 dstStr/*, int retry*/)
 317 {
 318         int error;
 319         UniChar uniStr[MAX_HFS_UNICODE_CHARS];
 320         size_t ucslen;
 321
 322         error = utf8_decodestr(srcStr, srcLen, uniStr, &ucslen, sizeof(uniStr), ':', 0);
 323         if (error == 0)
 324                 error = unicode_to_hfs(vcb, ucslen, uniStr, dstStr, 1);
 325
 326         return error;
 327 }
 328
 329 int
 330 utf8_to_mac_roman(ByteCount srcLen, const unsigned char* srcStr, Str31 dstStr)
 331 {
 332         int error;
 333         UniChar uniStr[MAX_HFS_UNICODE_CHARS];
 334         size_t ucslen;
 335
 336         error = utf8_decodestr(srcStr, srcLen, uniStr, &ucslen, sizeof(uniStr), ':', 0);
 337         if (error == 0)
 338                 error = unicode_to_mac_roman(uniStr, ucslen/sizeof(UniChar), dstStr);
 339
 340         return error;
 341 }
 342
 343 /*
 344  * HFS MacRoman to/from Unicode conversions are built into the kernel
 345  * All others hfs encodings are loadable.
 346  */
 347
 348 /* 0x00A0 - 0x00FF = Latin 1 Supplement (30 total) */
 349 static u_int8_t gLatin1Table[] = {
 350   /*              0     1     2     3     4     5     6     7     8     9     A     B     C     D     E     F  */
 351   /* 0x00A0 */  0xCA, 0xC1, 0xA2, 0xA3, 0xDB, 0xB4,  '?', 0xA4, 0xAC, 0xA9, 0xBB, 0xC7, 0xC2,  '?', 0xA8, 0xF8,
 352   /* 0x00B0 */  0xA1, 0XB1,  '?',  '?', 0xAB, 0xB5, 0xA6, 0xe1, 0xFC,  '?', 0xBC, 0xC8,  '?',  '?',  '?', 0xC0,
 353   /* 0x00C0 */   '?',  '?',  '?',  '?',  '?',  '?', 0xAE,  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 354   /* 0x00D0 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xAF,  '?',  '?',  '?',  '?',  '?',  '?', 0xA7,
 355   /* 0x00E0 */   '?',  '?',  '?',  '?',  '?',  '?', 0xBE,  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 356   /* 0x00F0 */   '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xD6, 0xBF,  '?',  '?',  '?',  '?',  '?',  '?',  '?'
 357 };
 358
 359 /* 0x02C0 - 0x02DF = Spacing Modifiers (8 total) */
 360 static u_int8_t gSpaceModsTable[] = {
 361   /*              0     1     2     3     4     5     6     7     8     9     A     B     C     D     E     F  */
 362   /* 0x02C0 */   '?',  '?',  '?',  '?',  '?',  '?', 0xF6, 0xFF,  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 363   /* 0x02D0 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xF9, 0xFA, 0xFB, 0xFE, 0xF7, 0xFD,  '?',  '?'
 364 };
 365
 366 /* 0x2010 - 0x20AF = General Punctuation (17 total) */
 367 static u_int8_t gPunctTable[] = {
 368   /*              0     1     2     3     4     5     6     7     8     9     A     B     C     D     E     F  */
 369   /* 0x2010 */   '?',  '?',  '?', 0xd0, 0xd1,  '?',  '?',  '?', 0xd4, 0xd5, 0xe2,  '?', 0xd2, 0xd3, 0xe3,  '?',
 370   /* 0x2020 */  0xa0, 0xe0, 0xa5,  '?',  '?',  '?', 0xc9,  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 371   /* 0x2030 */  0xe4,  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xdc, 0xdd,  '?',  '?',  '?',  '?',  '?',
 372   /* 0x2040 */   '?',  '?',  '?',  '?', 0xda,  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 373   /* 0x2050 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 374   /* 0x2060 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 375   /* 0x2070 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 376   /* 0x2080 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 377   /* 0x2090 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 378   /* 0x20A0 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xdb,  '?',  '?',  '?'
 379 };
 380
 381 /* 0x22xx = Mathematical Operators (11 total) */
 382 static u_int8_t gMathTable[] = {
 383   /*              0     1     2     3     4     5     6     7     8     9     A     B     C     D     E     F  */
 384   /* 0x2200 */   '?',  '?', 0xb6,  '?',  '?',  '?', 0xc6,  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xb8,
 385   /* 0x2210 */   '?', 0xb7,  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xc3,  '?',  '?',  '?', 0xb0,  '?',
 386   /* 0x2220 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xba,  '?',  '?',  '?',  '?',
 387   /* 0x2230 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 388   /* 0x2240 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xc5,  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 389   /* 0x2250 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 390   /* 0x2260 */  0xad,  '?',  '?',  '?', 0xb2, 0xb3,  '?',  '?'
 391 };
 392
 393 /* */
 394 static u_int8_t gReverseCombTable[] = {
 395   /*              0     1     2     3     4     5     6     7     8     9     A     B     C     D     E     F  */
 396   /* 0x40 */    0xDA, 0x40, 0xDA, 0xDA, 0xDA, 0x56, 0xDA, 0xDA, 0xDA, 0x6C, 0xDA, 0xDA, 0xDA, 0xDA, 0x82, 0x98,
 397   /* 0x50 */    0xDA, 0xDA, 0xDA, 0xDA, 0xDA, 0xAE, 0xDA, 0xDA, 0xDA, 0xC4, 0xDA, 0xDA, 0xDA, 0xDA, 0xDA, 0xDA,
 398   /* 0x60 */    0xDA, 0x4B, 0xDA, 0xDA, 0xDA, 0x61, 0xDA, 0xDA, 0xDA, 0x77, 0xDA, 0xDA, 0xDA, 0xDA, 0x8D, 0xA3,
 399   /* 0x70 */    0xDA, 0xDA, 0xDA, 0xDA, 0xDA, 0xB9, 0xDA, 0xDA, 0xDA, 0xCF, 0xDA, 0xDA, 0xDA, 0xDA, 0xDA, 0xDA,
 400
 401   /* Combining Diacritical Marks (0x0300 - 0x030A) */
 402   /*              0     1     2     3     4     5     6     7     8     9     A  */
 403   /*  'A'   */
 404   /* 0x0300 */  0xCB, 0xE7, 0xE5, 0xCC,  '?',  '?',  '?',  '?', 0x80,  '?', 0x81,
 405
 406   /*  'a'   */
 407   /* 0x0300 */  0x88, 0x87, 0x89, 0x8B,  '?',  '?',  '?',  '?', 0x8A,  '?', 0x8C,
 408
 409   /*  'E'   */
 410   /* 0x0300 */  0xE9, 0x83, 0xE6,  '?',  '?',  '?',  '?',  '?', 0xE8,  '?',  '?',
 411
 412   /*  'e'   */
 413   /* 0x0300 */  0x8F, 0x8E, 0x90,  '?',  '?',  '?',  '?',  '?', 0x91,  '?',  '?',
 414
 415   /*  'I'   */
 416   /* 0x0300 */  0xED, 0xEA, 0xEB,  '?',  '?',  '?',  '?',  '?', 0xEC,  '?',  '?',
 417
 418   /*  'i'   */
 419   /* 0x0300 */  0x93, 0x92, 0x94,  '?',  '?',  '?',  '?',  '?', 0x95,  '?',  '?',
 420
 421   /*  'N'   */
 422   /* 0x0300 */   '?',  '?',  '?', 0x84,  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 423
 424   /*  'n'   */
 425   /* 0x0300 */   '?',  '?',  '?', 0x96,  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 426
 427   /*  'O'   */
 428   /* 0x0300 */  0xF1, 0xEE, 0xEF, 0xCD,  '?',  '?',  '?',  '?', 0x85,  '?',  '?',
 429
 430   /*  'o'   */
 431   /* 0x0300 */  0x98, 0x97, 0x99, 0x9B,  '?',  '?',  '?',  '?', 0x9A,  '?',  '?',
 432
 433   /*  'U'   */
 434   /* 0x0300 */  0xF4, 0xF2, 0xF3,  '?',  '?',  '?',  '?',  '?', 0x86,  '?',  '?',
 435
 436   /*  'u'   */
 437   /* 0x0300 */  0x9D, 0x9C, 0x9E,  '?',  '?',  '?',  '?',  '?', 0x9F,  '?',  '?',
 438
 439   /*  'Y'   */
 440   /* 0x0300 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xD9,  '?',  '?',
 441
 442   /*  'y'   */
 443   /* 0x0300 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xD8,  '?',  '?',
 444
 445   /*  else  */
 446   /* 0x0300 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?'
 447 };
 448
 449
 450 /*
 451  * Convert Unicode string into HFS MacRoman encoding
 452  *
 453  * Assumes Unicode input is fully decomposed
 454  */
 455 static int unicode_to_mac_roman(UniChar *uni_str, u_int32_t unicodeChars, Str31 hfs_str)
 456 {
 457         u_int8_t        *p;
 458         const UniChar   *u;
 459         UniChar         c;
 460         UniChar         mask;
 461         u_int16_t       inputChars;
 462         u_int16_t       pascalChars;
 463         OSErr           result = noErr;
 464         u_int8_t        lsb;
 465         u_int8_t        prevChar;
 466         u_int8_t        mc;
 467
 468         mask = (UniChar) 0xFF80;
 469         p = &hfs_str[1];
 470         u = uni_str;
 471         inputChars = unicodeChars;
 472         pascalChars = prevChar = 0;
 473
 474         while (inputChars) {
 475                 c = *(u++);
 476                 lsb = (u_int8_t) c;
 477
 478                 /*
 479                  * If its not 7-bit ascii, then we need to map it
 480                  */
 481                 if ( c & mask ) {
 482                         mc = '?';
 483                         switch (c & 0xFF00) {
 484                         case 0x0000:
 485                                 if (lsb >= 0xA0)
 486                                         mc = gLatin1Table[lsb - 0xA0];
 487                                 break;
 488
 489                         case 0x0200:
 490                                 if (lsb >= 0xC0 && lsb <= 0xDF)
 491                                         mc = gSpaceModsTable[lsb - 0xC0];
 492                                 break;
 493
 494                         case 0x2000:
 495                                 if (lsb >= 0x10 && lsb <= 0xAF)
 496                                         mc = gPunctTable[lsb- 0x10];
 497                                 break;
 498
 499                         case 0x2200:
 500                                 if (lsb <= 0x68)
 501                                         mc = gMathTable[lsb];
 502                                 break;
 503
 504                         case 0x0300:
 505                                 if (c <= 0x030A) {
 506                                         if (prevChar >= 'A' && prevChar < 'z') {
 507                                                 mc = gReverseCombTable[gReverseCombTable[prevChar - 0x40] + lsb];
 508                                                 --p;    /* backup over base char */
 509                                                 --pascalChars;
 510                                         }
 511                                 } else {
 512                                         switch (c) {
 513                                         case 0x0327:    /* combining cedilla */
 514                                                 if (prevChar == 'C')
 515                                                         mc = 0x82;
 516                                                 else if (prevChar == 'c')
 517                                                         mc = 0x8D;
 518                                                 else
 519                                                         break;
 520                                                 --p;    /* backup over base char */
 521                                                 --pascalChars;
 522                                                 break;
 523
 524                                         case 0x03A9: mc = 0xBD; break;  /* omega */
 525
 526                                         case 0x03C0: mc = 0xB9; break;  /* pi */
 527                                         }
 528                                 }
 529                                 break;
 530
 531                         default:
 532                                 switch (c) {
 533                                 case 0x0131: mc = 0xf5; break;  /* dotless i */
 534
 535                                 case 0x0152: mc = 0xce; break;  /* OE */
 536
 537                                 case 0x0153: mc = 0xcf; break;  /* oe */
 538
 539                                 case 0x0192: mc = 0xc4; break;  /* Ä */
 540
 541                                 case 0x2122: mc = 0xaa; break;  /* TM */
 542
 543                                 case 0x25ca: mc = 0xd7; break;  /* diamond */
 544
 545                                 case 0xf8ff: mc = 0xf0; break;  /* apple logo */
 546
 547                                 case 0xfb01: mc = 0xde; break;  /* fi */
 548
 549                                 case 0xfb02: mc = 0xdf; break;  /* fl */
 550                                 }
 551                         } /* end switch (c & 0xFF00) */
 552
 553                         /*
 554                          * If we have an unmapped character then we need to mangle the name...
 555                          */
 556                         if (mc == '?')
 557                                 result = kTECUsedFallbacksStatus;
 558
 559                         prevChar = 0;
 560                         lsb = mc;
 561
 562                 } else {
 563                         prevChar = lsb;
 564                 }
 565
 566                 if (pascalChars >= 31)
 567                         break;
 568
 569                 *(p++) = lsb;
 570                 ++pascalChars;
 571                 --inputChars;
 572
 573         } /* end while */
 574
 575         hfs_str[0] = pascalChars;
 576
 577         if (inputChars > 0)
 578                 result = ENAMETOOLONG;  /* ran out of room! */
 579
 580         return result;
 581 }
 582
 583
 584 static UniChar gHiBitBaseUnicode[128] = {
 585   /* 0x80 */    0x0041, 0x0041, 0x0043, 0x0045, 0x004e, 0x004f, 0x0055, 0x0061,
 586   /* 0x88 */    0x0061, 0x0061, 0x0061, 0x0061, 0x0061, 0x0063, 0x0065, 0x0065,
 587   /* 0x90 */    0x0065, 0x0065, 0x0069, 0x0069, 0x0069, 0x0069, 0x006e, 0x006f,
 588   /* 0x98 */    0x006f, 0x006f, 0x006f, 0x006f, 0x0075, 0x0075, 0x0075, 0x0075,
 589   /* 0xa0 */    0x2020, 0x00b0, 0x00a2, 0x00a3, 0x00a7, 0x2022, 0x00b6, 0x00df,
 590   /* 0xa8 */    0x00ae, 0x00a9, 0x2122, 0x00b4, 0x00a8, 0x2260, 0x00c6, 0x00d8,
 591   /* 0xb0 */    0x221e, 0x00b1, 0x2264, 0x2265, 0x00a5, 0x00b5, 0x2202, 0x2211,
 592   /* 0xb8 */    0x220f, 0x03c0, 0x222b, 0x00aa, 0x00ba, 0x03a9, 0x00e6, 0x00f8,
 593   /* 0xc0 */    0x00bf, 0x00a1, 0x00ac, 0x221a, 0x0192, 0x2248, 0x2206, 0x00ab,
 594   /* 0xc8 */    0x00bb, 0x2026, 0x00a0, 0x0041, 0x0041, 0x004f, 0x0152, 0x0153,
 595   /* 0xd0 */    0x2013, 0x2014, 0x201c, 0x201d, 0x2018, 0x2019, 0x00f7, 0x25ca,
 596   /* 0xd8 */    0x0079, 0x0059, 0x2044, 0x20ac, 0x2039, 0x203a, 0xfb01, 0xfb02,
 597   /* 0xe0 */    0x2021, 0x00b7, 0x201a, 0x201e, 0x2030, 0x0041, 0x0045, 0x0041,
 598   /* 0xe8 */    0x0045, 0x0045, 0x0049, 0x0049, 0x0049, 0x0049, 0x004f, 0x004f,
 599   /* 0xf0 */    0xf8ff, 0x004f, 0x0055, 0x0055, 0x0055, 0x0131, 0x02c6, 0x02dc,
 600   /* 0xf8 */    0x00af, 0x02d8, 0x02d9, 0x02da, 0x00b8, 0x02dd, 0x02db, 0x02c7
 601 };
 602
 603 static UniChar gHiBitCombUnicode[128] = {
 604   /* 0x80 */    0x0308, 0x030a, 0x0327, 0x0301, 0x0303, 0x0308, 0x0308, 0x0301,
 605   /* 0x88 */    0x0300, 0x0302, 0x0308, 0x0303, 0x030a, 0x0327, 0x0301, 0x0300,
 606   /* 0x90 */    0x0302, 0x0308, 0x0301, 0x0300, 0x0302, 0x0308, 0x0303, 0x0301,
 607   /* 0x98 */    0x0300, 0x0302, 0x0308, 0x0303, 0x0301, 0x0300, 0x0302, 0x0308,
 608   /* 0xa0 */    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
 609   /* 0xa8 */    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
 610   /* 0xb0 */    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
 611   /* 0xb8 */    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
 612   /* 0xc0 */    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
 613   /* 0xc8 */    0x0000, 0x0000, 0x0000, 0x0300, 0x0303, 0x0303, 0x0000, 0x0000,
 614   /* 0xd0 */    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
 615   /* 0xd8 */    0x0308, 0x0308, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
 616   /* 0xe0 */    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0302, 0x0302, 0x0301,
 617   /* 0xe8 */    0x0308, 0x0300, 0x0301, 0x0302, 0x0308, 0x0300, 0x0301, 0x0302,
 618   /* 0xf0 */    0x0000, 0x0300, 0x0301, 0x0302, 0x0300, 0x0000, 0x0000, 0x0000,
 619   /* 0xf8 */    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000
 620 };
 621
 622
 623 /*
 624  * Convert HFS MacRoman encoded string into Unicode
 625  *
 626  * Unicode output is fully decomposed
 627  */
 628 int
 629 mac_roman_to_unicode(const Str31 hfs_str, UniChar *uni_str,
 630                                 __unused u_int32_t maxCharLen, u_int32_t *unicodeChars)
 631 {
 632         const u_int8_t  *p;
 633         UniChar  *u;
 634         u_int16_t  pascalChars;
 635         u_int8_t  c;
 636
 637         p = hfs_str;
 638         u = uni_str;
 639
 640         *unicodeChars = pascalChars = *(p++);   /* pick up length byte */
 641
 642         while (pascalChars--) {
 643                 c = *(p++);
 644
 645                 if ( (int8_t) c >= 0 ) {                /* check if seven bit ascii */
 646                         *(u++) = (UniChar) c;   /* just pad high byte with zero */
 647                 } else { /* its a hi bit character */
 648                         UniChar uc;
 649
 650                         c &= 0x7F;
 651                         *(u++) = uc = gHiBitBaseUnicode[c];
 652
 653                         /*
 654                          * if the unicode character we get back is an alpha char
 655                          * then we must have an additional combining character
 656                          */
 657                         if ((uc <= (UniChar) 'z') && (uc >= (UniChar) 'A')) {
 658                                 *(u++) = gHiBitCombUnicode[c];
 659                                 ++(*unicodeChars);
 660                         }
 661                 }
 662         }
 663
 664         return noErr;
 665 }
 666
 667 #else /* not HFS - temp workaround until 4277828 is fixed */
 668 /* stubs for exported routines that aren't present when we build kernel without HFS */
 669
 670 #include <sys/types.h>
 671 #include <sys/errno.h>
 672
 673 int hfs_addconverter(int id, u_int32_t encoding, void * get_unicode, void * get_hfsname);
 674 int hfs_getconverter(u_int32_t encoding, void *get_unicode, void *get_hfsname);
 675 int hfs_relconverter(u_int32_t encoding);
 676 int hfs_remconverter(int id, u_int32_t encoding);
 677
 678 int hfs_addconverter( __unused int id,
 679                                           __unused u_int32_t encoding,
 680                                           __unused void * get_unicode,
 681                                           __unused void * get_hfsname )
 682 {
 683         return(0);
 684 }
 685
 686 int hfs_getconverter(__unused u_int32_t encoding, __unused void *get_unicode, __unused void *get_hfsname)
 687 {
 688         return(EINVAL);
 689 }
 690
 691 int hfs_relconverter(__unused u_int32_t encoding)
 692 {
 693         return(EINVAL);
 694 }
 695
 696 int hfs_remconverter(__unused int id, __unused u_int32_t encoding)
 697 {
 698         return(0);
 699 }
 700
 701 #endif /* HFS */