bsd/hfs/hfs_encodings.c

   1 /*
   2  * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22
  23 #include <sys/param.h>
  24 #include <sys/systm.h>
  25 #include <sys/kernel.h>
  26 #include <sys/malloc.h>
  27 #include <sys/queue.h>
  28 #include <sys/utfconv.h>
  29
  30 #include "hfs.h"
  31
  32
  33 lck_grp_t * encodinglst_lck_grp;
  34 lck_grp_attr_t * encodinglst_lck_grp_attr;
  35 lck_attr_t * encodinglst_lck_attr;
  36
  37
  38 /* hfs encoding converter list */
  39 SLIST_HEAD(encodinglst, hfs_encoding) hfs_encoding_list = {0};
  40
  41 lck_mtx_t  encodinglst_mutex;
  42
  43
  44
  45 /* hfs encoding converter entry */
  46 struct  hfs_encoding {
  47         SLIST_ENTRY(hfs_encoding)  link;
  48         int                     refcount;
  49         int                     kmod_id;
  50         UInt32                  encoding;
  51         hfs_to_unicode_func_t   get_unicode_func;
  52         unicode_to_hfs_func_t   get_hfsname_func;
  53 };
  54
  55 /* XXX We should use an "official" interface! */
  56 extern kern_return_t kmod_destroy(host_priv_t host_priv, kmod_t id);
  57 extern struct host realhost;
  58
  59 #define MAX_HFS_UNICODE_CHARS   (15*5)
  60
  61 int mac_roman_to_unicode(const Str31 hfs_str, UniChar *uni_str, UInt32 maxCharLen, UInt32 *usedCharLen);
  62
  63 static int unicode_to_mac_roman(UniChar *uni_str, UInt32 unicodeChars, Str31 hfs_str);
  64
  65
  66 void
  67 hfs_converterinit(void)
  68 {
  69         SLIST_INIT(&hfs_encoding_list);
  70
  71         encodinglst_lck_grp_attr= lck_grp_attr_alloc_init();
  72         encodinglst_lck_grp  = lck_grp_alloc_init("cnode_hash", encodinglst_lck_grp_attr);
  73         encodinglst_lck_attr = lck_attr_alloc_init();
  74
  75         lck_mtx_init(&encodinglst_mutex, encodinglst_lck_grp, encodinglst_lck_attr);
  76
  77         /*
  78          * add resident MacRoman converter and take a reference
  79          * since its always "loaded".
  80          */
  81         hfs_addconverter(0, kTextEncodingMacRoman, mac_roman_to_unicode, unicode_to_mac_roman);
  82         SLIST_FIRST(&hfs_encoding_list)->refcount++;
  83 }
  84
  85
  86 /*
  87  * hfs_addconverter - add an HFS encoding converter
  88  *
  89  * This is called exclusivly by kernel loadable modules
  90  * (like HFS_Japanese.kmod) to register hfs encoding
  91  * conversion routines.
  92  *
  93  */
  94 int
  95 hfs_addconverter(int id, UInt32 encoding, hfs_to_unicode_func_t get_unicode, unicode_to_hfs_func_t get_hfsname)
  96 {
  97         struct hfs_encoding *encp;
  98
  99         MALLOC(encp, struct hfs_encoding *, sizeof(struct hfs_encoding), M_TEMP, M_WAITOK);
 100
 101         lck_mtx_lock(&encodinglst_mutex);
 102
 103         encp->link.sle_next = NULL;
 104         encp->refcount = 0;
 105         encp->encoding = encoding;
 106         encp->get_unicode_func = get_unicode;
 107         encp->get_hfsname_func = get_hfsname;
 108         encp->kmod_id = id;
 109         SLIST_INSERT_HEAD(&hfs_encoding_list, encp, link);
 110
 111         lck_mtx_unlock(&encodinglst_mutex);
 112         return (0);
 113 }
 114
 115
 116 /*
 117  * hfs_remconverter - remove an HFS encoding converter
 118  *
 119  * Can be called by a kernel loadable module's finalize
 120  * routine to remove an encoding converter so that the
 121  * module (i.e. the code) can be unloaded.
 122  *
 123  * However, in the normal case, the removing and unloading
 124  * of these converters is done in hfs_relconverter.
 125  * The call is initiated from within the kernel during the unmounting of an hfs voulume.
 126  */
 127 int
 128 hfs_remconverter(int id, UInt32 encoding)
 129 {
 130         struct hfs_encoding *encp;
 131
 132         lck_mtx_lock(&encodinglst_mutex);
 133         SLIST_FOREACH(encp, &hfs_encoding_list, link) {
 134                 if (encp->encoding == encoding && encp->kmod_id == id) {
 135                         encp->refcount--;
 136
 137                         /* if converter is no longer in use, release it */
 138                         if (encp->refcount <= 0 && encp->kmod_id != 0) {
 139                                 SLIST_REMOVE(&hfs_encoding_list, encp, hfs_encoding, link);
 140                                 lck_mtx_unlock(&encodinglst_mutex);
 141                                 FREE(encp, M_TEMP);
 142                                 return (0);
 143                         } else {
 144                                 lck_mtx_unlock(&encodinglst_mutex);
 145                                 return (1);   /* busy */
 146                         }
 147                         break;
 148                 }
 149         }
 150         lck_mtx_unlock(&encodinglst_mutex);
 151
 152         return (0);
 153 }
 154
 155
 156 /*
 157  * hfs_getconverter - get HFS encoding converters
 158  *
 159  * Normally called during the mounting of an hfs voulume.
 160  */
 161 int
 162 hfs_getconverter(UInt32 encoding, hfs_to_unicode_func_t *get_unicode, unicode_to_hfs_func_t *get_hfsname)
 163 {
 164         struct hfs_encoding *encp;
 165         int found = 0;
 166
 167         lck_mtx_lock(&encodinglst_mutex);
 168         SLIST_FOREACH(encp, &hfs_encoding_list, link) {
 169                 if (encp->encoding == encoding) {
 170                         found = 1;
 171                         *get_unicode = encp->get_unicode_func;
 172                         *get_hfsname = encp->get_hfsname_func;
 173                         ++encp->refcount;
 174                         break;
 175                 }
 176         }
 177         lck_mtx_unlock(&encodinglst_mutex);
 178
 179         if (!found) {
 180                 *get_unicode = NULL;
 181                 *get_hfsname = NULL;
 182                 return (EINVAL);
 183         }
 184
 185         return (0);
 186 }
 187
 188
 189 /*
 190  * hfs_relconverter - release interest in an HFS encoding converter
 191  *
 192  * Normally called during the unmounting of an hfs voulume.
 193  */
 194 int
 195 hfs_relconverter(UInt32 encoding)
 196 {
 197         struct hfs_encoding *encp;
 198
 199         lck_mtx_lock(&encodinglst_mutex);
 200         SLIST_FOREACH(encp, &hfs_encoding_list, link) {
 201                 if (encp->encoding == encoding) {
 202                         encp->refcount--;
 203
 204                         /* if converter is no longer in use, release it */
 205                         if (encp->refcount <= 0 && encp->kmod_id != 0) {
 206                                 int id = encp->kmod_id;
 207
 208                                 SLIST_REMOVE(&hfs_encoding_list, encp, hfs_encoding, link);
 209                                 lck_mtx_unlock(&encodinglst_mutex);
 210
 211                                 FREE(encp, M_TEMP);
 212                                 kmod_destroy((host_priv_t) host_priv_self(), id);
 213                                 return (0);
 214                         }
 215                         lck_mtx_unlock(&encodinglst_mutex);
 216                         return (0);
 217                 }
 218         }
 219         lck_mtx_unlock(&encodinglst_mutex);
 220
 221         return (EINVAL);
 222 }
 223
 224
 225 /*
 226  * Convert HFS encoded string into UTF-8
 227  *
 228  * Unicode output is fully decomposed
 229  * '/' chars are converted to ':'
 230  */
 231 int
 232 hfs_to_utf8(ExtendedVCB *vcb, Str31 hfs_str, ByteCount maxDstLen, ByteCount *actualDstLen, unsigned char* dstStr)
 233 {
 234         int error;
 235         UniChar uniStr[MAX_HFS_UNICODE_CHARS];
 236         ItemCount uniCount;
 237         size_t utf8len;
 238         hfs_to_unicode_func_t hfs_get_unicode = VCBTOHFS(vcb)->hfs_get_unicode;
 239
 240         error = hfs_get_unicode(hfs_str, uniStr, MAX_HFS_UNICODE_CHARS, &uniCount);
 241
 242         if (uniCount == 0)
 243                 error = EINVAL;
 244
 245         if (error == 0) {
 246                 error = utf8_encodestr(uniStr, uniCount * sizeof(UniChar), dstStr, &utf8len, maxDstLen , ':', 0);
 247                 if (error == ENAMETOOLONG)
 248                         *actualDstLen = utf8_encodelen(uniStr, uniCount * sizeof(UniChar), ':', 0);
 249                 else
 250                         *actualDstLen = utf8len;
 251         }
 252
 253         return error;
 254 }
 255
 256
 257 /*
 258  * When an HFS name cannot be encoded with the current
 259  * volume encoding then MacRoman is used as a fallback.
 260  */
 261 int
 262 mac_roman_to_utf8(Str31 hfs_str, ByteCount maxDstLen, ByteCount *actualDstLen, unsigned char* dstStr)
 263 {
 264         int error;
 265         UniChar uniStr[MAX_HFS_UNICODE_CHARS];
 266         ItemCount uniCount;
 267         size_t utf8len;
 268
 269         error = mac_roman_to_unicode(hfs_str, uniStr, MAX_HFS_UNICODE_CHARS, &uniCount);
 270
 271         if (uniCount == 0)
 272                 error = EINVAL;
 273
 274         if (error == 0) {
 275                 error = utf8_encodestr(uniStr, uniCount * sizeof(UniChar), dstStr, &utf8len, maxDstLen , ':', 0);
 276                 if (error == ENAMETOOLONG)
 277                         *actualDstLen = utf8_encodelen(uniStr, uniCount * sizeof(UniChar), ':', 0);
 278                 else
 279                         *actualDstLen = utf8len;
 280         }
 281
 282         return error;
 283 }
 284
 285
 286 /*
 287  * Convert Unicode string into HFS encoding
 288  *
 289  * ':' chars are converted to '/'
 290  * Assumes input represents fully decomposed Unicode
 291  */
 292 int
 293 unicode_to_hfs(ExtendedVCB *vcb, ByteCount srcLen, u_int16_t* srcStr, Str31 dstStr, int retry)
 294 {
 295         int error;
 296         unicode_to_hfs_func_t hfs_get_hfsname = VCBTOHFS(vcb)->hfs_get_hfsname;
 297
 298         error = hfs_get_hfsname(srcStr, srcLen/sizeof(UniChar), dstStr);
 299         if (error && retry) {
 300                 error = unicode_to_mac_roman(srcStr, srcLen/sizeof(UniChar), dstStr);
 301         }
 302         return error;
 303 }
 304
 305 /*
 306  * Convert UTF-8 string into HFS encoding
 307  *
 308  * ':' chars are converted to '/'
 309  * Assumes input represents fully decomposed Unicode
 310  */
 311 int
 312 utf8_to_hfs(ExtendedVCB *vcb, ByteCount srcLen, const unsigned char* srcStr, Str31 dstStr/*, int retry*/)
 313 {
 314         int error;
 315         UniChar uniStr[MAX_HFS_UNICODE_CHARS];
 316         size_t ucslen;
 317
 318         error = utf8_decodestr(srcStr, srcLen, uniStr, &ucslen, sizeof(uniStr), ':', 0);
 319         if (error == 0)
 320                 error = unicode_to_hfs(vcb, ucslen, uniStr, dstStr, 1);
 321
 322         return error;
 323 }
 324
 325 int
 326 utf8_to_mac_roman(ByteCount srcLen, const unsigned char* srcStr, Str31 dstStr)
 327 {
 328         int error;
 329         UniChar uniStr[MAX_HFS_UNICODE_CHARS];
 330         size_t ucslen;
 331
 332         error = utf8_decodestr(srcStr, srcLen, uniStr, &ucslen, sizeof(uniStr), ':', 0);
 333         if (error == 0)
 334                 error = unicode_to_mac_roman(uniStr, ucslen/sizeof(UniChar), dstStr);
 335
 336         return error;
 337 }
 338
 339 /*
 340  * HFS MacRoman to/from Unicode conversions are built into the kernel
 341  * All others hfs encodings are loadable.
 342  */
 343
 344 /* 0x00A0 - 0x00FF = Latin 1 Supplement (30 total) */
 345 static UInt8 gLatin1Table[] = {
 346   /*              0     1     2     3     4     5     6     7     8     9     A     B     C     D     E     F  */
 347   /* 0x00A0 */  0xCA, 0xC1, 0xA2, 0xA3, 0xDB, 0xB4,  '?', 0xA4, 0xAC, 0xA9, 0xBB, 0xC7, 0xC2,  '?', 0xA8, 0xF8,
 348   /* 0x00B0 */  0xA1, 0XB1,  '?',  '?', 0xAB, 0xB5, 0xA6, 0xe1, 0xFC,  '?', 0xBC, 0xC8,  '?',  '?',  '?', 0xC0,
 349   /* 0x00C0 */   '?',  '?',  '?',  '?',  '?',  '?', 0xAE,  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 350   /* 0x00D0 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xAF,  '?',  '?',  '?',  '?',  '?',  '?', 0xA7,
 351   /* 0x00E0 */   '?',  '?',  '?',  '?',  '?',  '?', 0xBE,  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 352   /* 0x00F0 */   '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xD6, 0xBF,  '?',  '?',  '?',  '?',  '?',  '?',  '?'
 353 };
 354
 355 /* 0x02C0 - 0x02DF = Spacing Modifiers (8 total) */
 356 static UInt8 gSpaceModsTable[] = {
 357   /*              0     1     2     3     4     5     6     7     8     9     A     B     C     D     E     F  */
 358   /* 0x02C0 */   '?',  '?',  '?',  '?',  '?',  '?', 0xF6, 0xFF,  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 359   /* 0x02D0 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xF9, 0xFA, 0xFB, 0xFE, 0xF7, 0xFD,  '?',  '?'
 360 };
 361
 362 /* 0x2010 - 0x20AF = General Punctuation (17 total) */
 363 static UInt8 gPunctTable[] = {
 364   /*              0     1     2     3     4     5     6     7     8     9     A     B     C     D     E     F  */
 365   /* 0x2010 */   '?',  '?',  '?', 0xd0, 0xd1,  '?',  '?',  '?', 0xd4, 0xd5, 0xe2,  '?', 0xd2, 0xd3, 0xe3,  '?',
 366   /* 0x2020 */  0xa0, 0xe0, 0xa5,  '?',  '?',  '?', 0xc9,  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 367   /* 0x2030 */  0xe4,  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xdc, 0xdd,  '?',  '?',  '?',  '?',  '?',
 368   /* 0x2040 */   '?',  '?',  '?',  '?', 0xda,  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 369   /* 0x2050 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 370   /* 0x2060 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 371   /* 0x2070 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 372   /* 0x2080 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 373   /* 0x2090 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 374   /* 0x20A0 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xdb,  '?',  '?',  '?'
 375 };
 376
 377 /* 0x22xx = Mathematical Operators (11 total) */
 378 static UInt8 gMathTable[] = {
 379   /*              0     1     2     3     4     5     6     7     8     9     A     B     C     D     E     F  */
 380   /* 0x2200 */   '?',  '?', 0xb6,  '?',  '?',  '?', 0xc6,  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xb8,
 381   /* 0x2210 */   '?', 0xb7,  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xc3,  '?',  '?',  '?', 0xb0,  '?',
 382   /* 0x2220 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xba,  '?',  '?',  '?',  '?',
 383   /* 0x2230 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 384   /* 0x2240 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xc5,  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 385   /* 0x2250 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 386   /* 0x2260 */  0xad,  '?',  '?',  '?', 0xb2, 0xb3,  '?',  '?'
 387 };
 388
 389 /* */
 390 static UInt8 gReverseCombTable[] = {
 391   /*              0     1     2     3     4     5     6     7     8     9     A     B     C     D     E     F  */
 392   /* 0x40 */    0xDA, 0x40, 0xDA, 0xDA, 0xDA, 0x56, 0xDA, 0xDA, 0xDA, 0x6C, 0xDA, 0xDA, 0xDA, 0xDA, 0x82, 0x98,
 393   /* 0x50 */    0xDA, 0xDA, 0xDA, 0xDA, 0xDA, 0xAE, 0xDA, 0xDA, 0xDA, 0xC4, 0xDA, 0xDA, 0xDA, 0xDA, 0xDA, 0xDA,
 394   /* 0x60 */    0xDA, 0x4B, 0xDA, 0xDA, 0xDA, 0x61, 0xDA, 0xDA, 0xDA, 0x77, 0xDA, 0xDA, 0xDA, 0xDA, 0x8D, 0xA3,
 395   /* 0x70 */    0xDA, 0xDA, 0xDA, 0xDA, 0xDA, 0xB9, 0xDA, 0xDA, 0xDA, 0xCF, 0xDA, 0xDA, 0xDA, 0xDA, 0xDA, 0xDA,
 396
 397   /* Combining Diacritical Marks (0x0300 - 0x030A) */
 398   /*              0     1     2     3     4     5     6     7     8     9     A  */
 399   /*  'A'   */
 400   /* 0x0300 */  0xCB, 0xE7, 0xE5, 0xCC,  '?',  '?',  '?',  '?', 0x80,  '?', 0x81,
 401
 402   /*  'a'   */
 403   /* 0x0300 */  0x88, 0x87, 0x89, 0x8B,  '?',  '?',  '?',  '?', 0x8A,  '?', 0x8C,
 404
 405   /*  'E'   */
 406   /* 0x0300 */  0xE9, 0x83, 0xE6,  '?',  '?',  '?',  '?',  '?', 0xE8,  '?',  '?',
 407
 408   /*  'e'   */
 409   /* 0x0300 */  0x8F, 0x8E, 0x90,  '?',  '?',  '?',  '?',  '?', 0x91,  '?',  '?',
 410
 411   /*  'I'   */
 412   /* 0x0300 */  0xED, 0xEA, 0xEB,  '?',  '?',  '?',  '?',  '?', 0xEC,  '?',  '?',
 413
 414   /*  'i'   */
 415   /* 0x0300 */  0x93, 0x92, 0x94,  '?',  '?',  '?',  '?',  '?', 0x95,  '?',  '?',
 416
 417   /*  'N'   */
 418   /* 0x0300 */   '?',  '?',  '?', 0x84,  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 419
 420   /*  'n'   */
 421   /* 0x0300 */   '?',  '?',  '?', 0x96,  '?',  '?',  '?',  '?',  '?',  '?',  '?',
 422
 423   /*  'O'   */
 424   /* 0x0300 */  0xF1, 0xEE, 0xEF, 0xCD,  '?',  '?',  '?',  '?', 0x85,  '?',  '?',
 425
 426   /*  'o'   */
 427   /* 0x0300 */  0x98, 0x97, 0x99, 0x9B,  '?',  '?',  '?',  '?', 0x9A,  '?',  '?',
 428
 429   /*  'U'   */
 430   /* 0x0300 */  0xF4, 0xF2, 0xF3,  '?',  '?',  '?',  '?',  '?', 0x86,  '?',  '?',
 431
 432   /*  'u'   */
 433   /* 0x0300 */  0x9D, 0x9C, 0x9E,  '?',  '?',  '?',  '?',  '?', 0x9F,  '?',  '?',
 434
 435   /*  'Y'   */
 436   /* 0x0300 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xD9,  '?',  '?',
 437
 438   /*  'y'   */
 439   /* 0x0300 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xD8,  '?',  '?',
 440
 441   /*  else  */
 442   /* 0x0300 */   '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?'
 443 };
 444
 445
 446 /*
 447  * Convert Unicode string into HFS MacRoman encoding
 448  *
 449  * Assumes Unicode input is fully decomposed
 450  */
 451 static int unicode_to_mac_roman(UniChar *uni_str, UInt32 unicodeChars, Str31 hfs_str)
 452 {
 453         UInt8           *p;
 454         const UniChar   *u;
 455         UniChar         c;
 456         UniChar         mask;
 457         UInt16          inputChars;
 458         UInt16          pascalChars;
 459         OSErr           result = noErr;
 460         UInt8           lsb;
 461         UInt8           prevChar;
 462         UInt8           mc;
 463
 464         mask = (UniChar) 0xFF80;
 465         p = &hfs_str[1];
 466         u = uni_str;
 467         inputChars = unicodeChars;
 468         pascalChars = prevChar = 0;
 469
 470         while (inputChars) {
 471                 c = *(u++);
 472                 lsb = (UInt8) c;
 473
 474                 /*
 475                  * If its not 7-bit ascii, then we need to map it
 476                  */
 477                 if ( c & mask ) {
 478                         mc = '?';
 479                         switch (c & 0xFF00) {
 480                         case 0x0000:
 481                                 if (lsb >= 0xA0)
 482                                         mc = gLatin1Table[lsb - 0xA0];
 483                                 break;
 484
 485                         case 0x0200:
 486                                 if (lsb >= 0xC0 && lsb <= 0xDF)
 487                                         mc = gSpaceModsTable[lsb - 0xC0];
 488                                 break;
 489
 490                         case 0x2000:
 491                                 if (lsb >= 0x10 && lsb <= 0xAF)
 492                                         mc = gPunctTable[lsb- 0x10];
 493                                 break;
 494
 495                         case 0x2200:
 496                                 if (lsb <= 0x68)
 497                                         mc = gMathTable[lsb];
 498                                 break;
 499
 500                         case 0x0300:
 501                                 if (c <= 0x030A) {
 502                                         if (prevChar >= 'A' && prevChar < 'z') {
 503                                                 mc = gReverseCombTable[gReverseCombTable[prevChar - 0x40] + lsb];
 504                                                 --p;    /* backup over base char */
 505                                                 --pascalChars;
 506                                         }
 507                                 } else {
 508                                         switch (c) {
 509                                         case 0x0327:    /* combining cedilla */
 510                                                 if (prevChar == 'C')
 511                                                         mc = 0x82;
 512                                                 else if (prevChar == 'c')
 513                                                         mc = 0x8D;
 514                                                 else
 515                                                         break;
 516                                                 --p;    /* backup over base char */
 517                                                 --pascalChars;
 518                                                 break;
 519
 520                                         case 0x03A9: mc = 0xBD; break;  /* omega */
 521
 522                                         case 0x03C0: mc = 0xB9; break;  /* pi */
 523                                         }
 524                                 }
 525                                 break;
 526
 527                         default:
 528                                 switch (c) {
 529                                 case 0x0131: mc = 0xf5; break;  /* dotless i */
 530
 531                                 case 0x0152: mc = 0xce; break;  /* OE */
 532
 533                                 case 0x0153: mc = 0xcf; break;  /* oe */
 534
 535                                 case 0x0192: mc = 0xc4; break;  /* Ä */
 536
 537                                 case 0x2122: mc = 0xaa; break;  /* TM */
 538
 539                                 case 0x25ca: mc = 0xd7; break;  /* diamond */
 540
 541                                 case 0xf8ff: mc = 0xf0; break;  /* apple logo */
 542
 543                                 case 0xfb01: mc = 0xde; break;  /* fi */
 544
 545                                 case 0xfb02: mc = 0xdf; break;  /* fl */
 546                                 }
 547                         } /* end switch (c & 0xFF00) */
 548
 549                         /*
 550                          * If we have an unmapped character then we need to mangle the name...
 551                          */
 552                         if (mc == '?')
 553                                 result = kTECUsedFallbacksStatus;
 554
 555                         prevChar = 0;
 556                         lsb = mc;
 557
 558                 } else {
 559                         prevChar = lsb;
 560                 }
 561
 562                 if (pascalChars >= 31)
 563                         break;
 564
 565                 *(p++) = lsb;
 566                 ++pascalChars;
 567                 --inputChars;
 568
 569         } /* end while */
 570
 571         hfs_str[0] = pascalChars;
 572
 573         if (inputChars > 0)
 574                 result = ENAMETOOLONG;  /* ran out of room! */
 575
 576         return result;
 577 }
 578
 579
 580 static UniChar gHiBitBaseUnicode[128] = {
 581   /* 0x80 */    0x0041, 0x0041, 0x0043, 0x0045, 0x004e, 0x004f, 0x0055, 0x0061,
 582   /* 0x88 */    0x0061, 0x0061, 0x0061, 0x0061, 0x0061, 0x0063, 0x0065, 0x0065,
 583   /* 0x90 */    0x0065, 0x0065, 0x0069, 0x0069, 0x0069, 0x0069, 0x006e, 0x006f,
 584   /* 0x98 */    0x006f, 0x006f, 0x006f, 0x006f, 0x0075, 0x0075, 0x0075, 0x0075,
 585   /* 0xa0 */    0x2020, 0x00b0, 0x00a2, 0x00a3, 0x00a7, 0x2022, 0x00b6, 0x00df,
 586   /* 0xa8 */    0x00ae, 0x00a9, 0x2122, 0x00b4, 0x00a8, 0x2260, 0x00c6, 0x00d8,
 587   /* 0xb0 */    0x221e, 0x00b1, 0x2264, 0x2265, 0x00a5, 0x00b5, 0x2202, 0x2211,
 588   /* 0xb8 */    0x220f, 0x03c0, 0x222b, 0x00aa, 0x00ba, 0x03a9, 0x00e6, 0x00f8,
 589   /* 0xc0 */    0x00bf, 0x00a1, 0x00ac, 0x221a, 0x0192, 0x2248, 0x2206, 0x00ab,
 590   /* 0xc8 */    0x00bb, 0x2026, 0x00a0, 0x0041, 0x0041, 0x004f, 0x0152, 0x0153,
 591   /* 0xd0 */    0x2013, 0x2014, 0x201c, 0x201d, 0x2018, 0x2019, 0x00f7, 0x25ca,
 592   /* 0xd8 */    0x0079, 0x0059, 0x2044, 0x20ac, 0x2039, 0x203a, 0xfb01, 0xfb02,
 593   /* 0xe0 */    0x2021, 0x00b7, 0x201a, 0x201e, 0x2030, 0x0041, 0x0045, 0x0041,
 594   /* 0xe8 */    0x0045, 0x0045, 0x0049, 0x0049, 0x0049, 0x0049, 0x004f, 0x004f,
 595   /* 0xf0 */    0xf8ff, 0x004f, 0x0055, 0x0055, 0x0055, 0x0131, 0x02c6, 0x02dc,
 596   /* 0xf8 */    0x00af, 0x02d8, 0x02d9, 0x02da, 0x00b8, 0x02dd, 0x02db, 0x02c7
 597 };
 598
 599 static UniChar gHiBitCombUnicode[128] = {
 600   /* 0x80 */    0x0308, 0x030a, 0x0327, 0x0301, 0x0303, 0x0308, 0x0308, 0x0301,
 601   /* 0x88 */    0x0300, 0x0302, 0x0308, 0x0303, 0x030a, 0x0327, 0x0301, 0x0300,
 602   /* 0x90 */    0x0302, 0x0308, 0x0301, 0x0300, 0x0302, 0x0308, 0x0303, 0x0301,
 603   /* 0x98 */    0x0300, 0x0302, 0x0308, 0x0303, 0x0301, 0x0300, 0x0302, 0x0308,
 604   /* 0xa0 */    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
 605   /* 0xa8 */    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
 606   /* 0xb0 */    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
 607   /* 0xb8 */    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
 608   /* 0xc0 */    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
 609   /* 0xc8 */    0x0000, 0x0000, 0x0000, 0x0300, 0x0303, 0x0303, 0x0000, 0x0000,
 610   /* 0xd0 */    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
 611   /* 0xd8 */    0x0308, 0x0308, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
 612   /* 0xe0 */    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0302, 0x0302, 0x0301,
 613   /* 0xe8 */    0x0308, 0x0300, 0x0301, 0x0302, 0x0308, 0x0300, 0x0301, 0x0302,
 614   /* 0xf0 */    0x0000, 0x0300, 0x0301, 0x0302, 0x0300, 0x0000, 0x0000, 0x0000,
 615   /* 0xf8 */    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000
 616 };
 617
 618
 619 /*
 620  * Convert HFS MacRoman encoded string into Unicode
 621  *
 622  * Unicode output is fully decomposed
 623  */
 624 int
 625 mac_roman_to_unicode(const Str31 hfs_str, UniChar *uni_str,
 626                                 UInt32 maxCharLen, UInt32 *unicodeChars)
 627 {
 628         const UInt8  *p;
 629         UniChar  *u;
 630         UInt16  pascalChars;
 631         UInt8  c;
 632
 633         p = hfs_str;
 634         u = uni_str;
 635
 636         *unicodeChars = pascalChars = *(p++);   /* pick up length byte */
 637
 638         while (pascalChars--) {
 639                 c = *(p++);
 640
 641                 if ( (SInt8) c >= 0 ) {         /* check if seven bit ascii */
 642                         *(u++) = (UniChar) c;   /* just pad high byte with zero */
 643                 } else { /* its a hi bit character */
 644                         UniChar uc;
 645
 646                         c &= 0x7F;
 647                         *(u++) = uc = gHiBitBaseUnicode[c];
 648
 649                         /*
 650                          * if the unicode character we get back is an alpha char
 651                          * then we must have an additional combining character
 652                          */
 653                         if ((uc <= (UniChar) 'z') && (uc >= (UniChar) 'A')) {
 654                                 *(u++) = gHiBitCombUnicode[c];
 655                                 ++(*unicodeChars);
 656                         }
 657                 }
 658         }
 659
 660         return noErr;
 661 }
 662