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