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Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * unicode.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Routines for converting between UTF-8 and OSTA Compressed Unicode. | |
6 | * Also handles filename mangling | |
7 | * | |
8 | * DESCRIPTION | |
9 | * OSTA Compressed Unicode is explained in the OSTA UDF specification. | |
10 | * http://www.osta.org/ | |
11 | * UTF-8 is explained in the IETF RFC XXXX. | |
12 | * ftp://ftp.internic.net/rfc/rfcxxxx.txt | |
13 | * | |
1da177e4 LT |
14 | * COPYRIGHT |
15 | * This file is distributed under the terms of the GNU General Public | |
16 | * License (GPL). Copies of the GPL can be obtained from: | |
17 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
18 | * Each contributing author retains all rights to their own work. | |
19 | */ | |
20 | ||
21 | #include "udfdecl.h" | |
22 | ||
23 | #include <linux/kernel.h> | |
24 | #include <linux/string.h> /* for memset */ | |
25 | #include <linux/nls.h> | |
f845fced | 26 | #include <linux/crc-itu-t.h> |
5a0e3ad6 | 27 | #include <linux/slab.h> |
1da177e4 LT |
28 | |
29 | #include "udf_sb.h" | |
30 | ||
0e5cc9a4 JK |
31 | static int udf_translate_to_linux(uint8_t *, int, uint8_t *, int, uint8_t *, |
32 | int); | |
1da177e4 | 33 | |
28de7948 | 34 | static int udf_char_to_ustr(struct ustr *dest, const uint8_t *src, int strlen) |
1da177e4 | 35 | { |
cb00ea35 | 36 | if ((!dest) || (!src) || (!strlen) || (strlen > UDF_NAME_LEN - 2)) |
1da177e4 | 37 | return 0; |
28de7948 | 38 | |
1da177e4 LT |
39 | memset(dest, 0, sizeof(struct ustr)); |
40 | memcpy(dest->u_name, src, strlen); | |
41 | dest->u_cmpID = 0x08; | |
42 | dest->u_len = strlen; | |
28de7948 | 43 | |
1da177e4 LT |
44 | return strlen; |
45 | } | |
46 | ||
47 | /* | |
48 | * udf_build_ustr | |
49 | */ | |
28de7948 | 50 | int udf_build_ustr(struct ustr *dest, dstring *ptr, int size) |
1da177e4 LT |
51 | { |
52 | int usesize; | |
53 | ||
6305a0a9 | 54 | if (!dest || !ptr || !size) |
1da177e4 | 55 | return -1; |
6305a0a9 | 56 | BUG_ON(size < 2); |
1da177e4 | 57 | |
6305a0a9 MS |
58 | usesize = min_t(size_t, ptr[size - 1], sizeof(dest->u_name)); |
59 | usesize = min(usesize, size - 2); | |
cb00ea35 | 60 | dest->u_cmpID = ptr[0]; |
6305a0a9 MS |
61 | dest->u_len = usesize; |
62 | memcpy(dest->u_name, ptr + 1, usesize); | |
63 | memset(dest->u_name + usesize, 0, sizeof(dest->u_name) - usesize); | |
28de7948 | 64 | |
1da177e4 LT |
65 | return 0; |
66 | } | |
67 | ||
68 | /* | |
69 | * udf_build_ustr_exact | |
70 | */ | |
31f2566f | 71 | static void udf_build_ustr_exact(struct ustr *dest, dstring *ptr, int exactsize) |
1da177e4 | 72 | { |
1da177e4 | 73 | memset(dest, 0, sizeof(struct ustr)); |
cb00ea35 CG |
74 | dest->u_cmpID = ptr[0]; |
75 | dest->u_len = exactsize - 1; | |
76 | memcpy(dest->u_name, ptr + 1, exactsize - 1); | |
1da177e4 LT |
77 | } |
78 | ||
79 | /* | |
d67e4a48 | 80 | * udf_CS0toUTF8 |
1da177e4 LT |
81 | * |
82 | * PURPOSE | |
83 | * Convert OSTA Compressed Unicode to the UTF-8 equivalent. | |
84 | * | |
1da177e4 LT |
85 | * PRE-CONDITIONS |
86 | * utf Pointer to UTF-8 output buffer. | |
87 | * ocu Pointer to OSTA Compressed Unicode input buffer | |
88 | * of size UDF_NAME_LEN bytes. | |
89 | * both of type "struct ustr *" | |
90 | * | |
91 | * POST-CONDITIONS | |
e9d4cf41 | 92 | * <return> >= 0 on success. |
1da177e4 LT |
93 | * |
94 | * HISTORY | |
95 | * November 12, 1997 - Andrew E. Mileski | |
96 | * Written, tested, and released. | |
97 | */ | |
79cfe0ff | 98 | int udf_CS0toUTF8(struct ustr *utf_o, const struct ustr *ocu_i) |
1da177e4 | 99 | { |
79cfe0ff | 100 | const uint8_t *ocu; |
1da177e4 LT |
101 | uint8_t cmp_id, ocu_len; |
102 | int i; | |
103 | ||
1da177e4 | 104 | ocu_len = ocu_i->u_len; |
cb00ea35 | 105 | if (ocu_len == 0) { |
1da177e4 | 106 | memset(utf_o, 0, sizeof(struct ustr)); |
1da177e4 LT |
107 | return 0; |
108 | } | |
109 | ||
79cfe0ff | 110 | cmp_id = ocu_i->u_cmpID; |
111 | if (cmp_id != 8 && cmp_id != 16) { | |
112 | memset(utf_o, 0, sizeof(struct ustr)); | |
78ace70c | 113 | pr_err("unknown compression code (%d) stri=%s\n", |
cb00ea35 | 114 | cmp_id, ocu_i->u_name); |
e9d4cf41 | 115 | return -EINVAL; |
1da177e4 LT |
116 | } |
117 | ||
79cfe0ff | 118 | ocu = ocu_i->u_name; |
119 | utf_o->u_len = 0; | |
cb00ea35 | 120 | for (i = 0; (i < ocu_len) && (utf_o->u_len <= (UDF_NAME_LEN - 3));) { |
1da177e4 LT |
121 | |
122 | /* Expand OSTA compressed Unicode to Unicode */ | |
79cfe0ff | 123 | uint32_t c = ocu[i++]; |
1da177e4 LT |
124 | if (cmp_id == 16) |
125 | c = (c << 8) | ocu[i++]; | |
126 | ||
127 | /* Compress Unicode to UTF-8 */ | |
79cfe0ff | 128 | if (c < 0x80U) |
28de7948 | 129 | utf_o->u_name[utf_o->u_len++] = (uint8_t)c; |
79cfe0ff | 130 | else if (c < 0x800U) { |
ad402b26 AG |
131 | if (utf_o->u_len > (UDF_NAME_LEN - 4)) |
132 | break; | |
4b11111a MS |
133 | utf_o->u_name[utf_o->u_len++] = |
134 | (uint8_t)(0xc0 | (c >> 6)); | |
135 | utf_o->u_name[utf_o->u_len++] = | |
136 | (uint8_t)(0x80 | (c & 0x3f)); | |
cb00ea35 | 137 | } else { |
ad402b26 AG |
138 | if (utf_o->u_len > (UDF_NAME_LEN - 5)) |
139 | break; | |
4b11111a MS |
140 | utf_o->u_name[utf_o->u_len++] = |
141 | (uint8_t)(0xe0 | (c >> 12)); | |
142 | utf_o->u_name[utf_o->u_len++] = | |
143 | (uint8_t)(0x80 | | |
144 | ((c >> 6) & 0x3f)); | |
145 | utf_o->u_name[utf_o->u_len++] = | |
146 | (uint8_t)(0x80 | (c & 0x3f)); | |
1da177e4 LT |
147 | } |
148 | } | |
cb00ea35 | 149 | utf_o->u_cmpID = 8; |
1da177e4 LT |
150 | |
151 | return utf_o->u_len; | |
152 | } | |
153 | ||
154 | /* | |
155 | * | |
d67e4a48 | 156 | * udf_UTF8toCS0 |
1da177e4 LT |
157 | * |
158 | * PURPOSE | |
159 | * Convert UTF-8 to the OSTA Compressed Unicode equivalent. | |
160 | * | |
161 | * DESCRIPTION | |
162 | * This routine is only called by udf_lookup(). | |
163 | * | |
164 | * PRE-CONDITIONS | |
165 | * ocu Pointer to OSTA Compressed Unicode output | |
166 | * buffer of size UDF_NAME_LEN bytes. | |
167 | * utf Pointer to UTF-8 input buffer. | |
168 | * utf_len Length of UTF-8 input buffer in bytes. | |
169 | * | |
170 | * POST-CONDITIONS | |
171 | * <return> Zero on success. | |
172 | * | |
173 | * HISTORY | |
174 | * November 12, 1997 - Andrew E. Mileski | |
175 | * Written, tested, and released. | |
176 | */ | |
28de7948 | 177 | static int udf_UTF8toCS0(dstring *ocu, struct ustr *utf, int length) |
1da177e4 LT |
178 | { |
179 | unsigned c, i, max_val, utf_char; | |
bb00c898 | 180 | int utf_cnt, u_len, u_ch; |
1da177e4 LT |
181 | |
182 | memset(ocu, 0, sizeof(dstring) * length); | |
183 | ocu[0] = 8; | |
184 | max_val = 0xffU; | |
bb00c898 | 185 | u_ch = 1; |
1da177e4 | 186 | |
28de7948 | 187 | try_again: |
1da177e4 LT |
188 | u_len = 0U; |
189 | utf_char = 0U; | |
190 | utf_cnt = 0U; | |
cb00ea35 | 191 | for (i = 0U; i < utf->u_len; i++) { |
bb00c898 AG |
192 | /* Name didn't fit? */ |
193 | if (u_len + 1 + u_ch >= length) | |
194 | return 0; | |
195 | ||
28de7948 | 196 | c = (uint8_t)utf->u_name[i]; |
1da177e4 LT |
197 | |
198 | /* Complete a multi-byte UTF-8 character */ | |
cb00ea35 | 199 | if (utf_cnt) { |
1da177e4 LT |
200 | utf_char = (utf_char << 6) | (c & 0x3fU); |
201 | if (--utf_cnt) | |
202 | continue; | |
cb00ea35 | 203 | } else { |
1da177e4 | 204 | /* Check for a multi-byte UTF-8 character */ |
cb00ea35 | 205 | if (c & 0x80U) { |
1da177e4 | 206 | /* Start a multi-byte UTF-8 character */ |
cb00ea35 | 207 | if ((c & 0xe0U) == 0xc0U) { |
1da177e4 LT |
208 | utf_char = c & 0x1fU; |
209 | utf_cnt = 1; | |
cb00ea35 | 210 | } else if ((c & 0xf0U) == 0xe0U) { |
1da177e4 LT |
211 | utf_char = c & 0x0fU; |
212 | utf_cnt = 2; | |
cb00ea35 | 213 | } else if ((c & 0xf8U) == 0xf0U) { |
1da177e4 LT |
214 | utf_char = c & 0x07U; |
215 | utf_cnt = 3; | |
cb00ea35 | 216 | } else if ((c & 0xfcU) == 0xf8U) { |
1da177e4 LT |
217 | utf_char = c & 0x03U; |
218 | utf_cnt = 4; | |
cb00ea35 | 219 | } else if ((c & 0xfeU) == 0xfcU) { |
1da177e4 LT |
220 | utf_char = c & 0x01U; |
221 | utf_cnt = 5; | |
28de7948 | 222 | } else { |
1da177e4 | 223 | goto error_out; |
28de7948 | 224 | } |
1da177e4 | 225 | continue; |
28de7948 | 226 | } else { |
1da177e4 LT |
227 | /* Single byte UTF-8 character (most common) */ |
228 | utf_char = c; | |
28de7948 | 229 | } |
1da177e4 LT |
230 | } |
231 | ||
232 | /* Choose no compression if necessary */ | |
cb00ea35 | 233 | if (utf_char > max_val) { |
28de7948 | 234 | if (max_val == 0xffU) { |
1da177e4 | 235 | max_val = 0xffffU; |
28de7948 | 236 | ocu[0] = (uint8_t)0x10U; |
bb00c898 | 237 | u_ch = 2; |
1da177e4 LT |
238 | goto try_again; |
239 | } | |
240 | goto error_out; | |
241 | } | |
242 | ||
4b11111a | 243 | if (max_val == 0xffffU) |
28de7948 | 244 | ocu[++u_len] = (uint8_t)(utf_char >> 8); |
28de7948 | 245 | ocu[++u_len] = (uint8_t)(utf_char & 0xffU); |
1da177e4 LT |
246 | } |
247 | ||
cb00ea35 | 248 | if (utf_cnt) { |
28de7948 | 249 | error_out: |
1da177e4 | 250 | ocu[++u_len] = '?'; |
78ace70c | 251 | printk(KERN_DEBUG pr_fmt("bad UTF-8 character\n")); |
1da177e4 LT |
252 | } |
253 | ||
28de7948 CG |
254 | ocu[length - 1] = (uint8_t)u_len + 1; |
255 | ||
1da177e4 LT |
256 | return u_len + 1; |
257 | } | |
258 | ||
cb00ea35 | 259 | static int udf_CS0toNLS(struct nls_table *nls, struct ustr *utf_o, |
34f953dd | 260 | const struct ustr *ocu_i) |
1da177e4 | 261 | { |
34f953dd | 262 | const uint8_t *ocu; |
1da177e4 | 263 | uint8_t cmp_id, ocu_len; |
59285c28 | 264 | int i, len; |
1da177e4 | 265 | |
1da177e4 LT |
266 | |
267 | ocu_len = ocu_i->u_len; | |
cb00ea35 | 268 | if (ocu_len == 0) { |
1da177e4 | 269 | memset(utf_o, 0, sizeof(struct ustr)); |
1da177e4 LT |
270 | return 0; |
271 | } | |
272 | ||
34f953dd | 273 | cmp_id = ocu_i->u_cmpID; |
274 | if (cmp_id != 8 && cmp_id != 16) { | |
275 | memset(utf_o, 0, sizeof(struct ustr)); | |
78ace70c | 276 | pr_err("unknown compression code (%d) stri=%s\n", |
cb00ea35 | 277 | cmp_id, ocu_i->u_name); |
78fc2e69 | 278 | return -EINVAL; |
1da177e4 LT |
279 | } |
280 | ||
34f953dd | 281 | ocu = ocu_i->u_name; |
282 | utf_o->u_len = 0; | |
cb00ea35 | 283 | for (i = 0; (i < ocu_len) && (utf_o->u_len <= (UDF_NAME_LEN - 3));) { |
1da177e4 | 284 | /* Expand OSTA compressed Unicode to Unicode */ |
34f953dd | 285 | uint32_t c = ocu[i++]; |
1da177e4 LT |
286 | if (cmp_id == 16) |
287 | c = (c << 8) | ocu[i++]; | |
288 | ||
59285c28 | 289 | len = nls->uni2char(c, &utf_o->u_name[utf_o->u_len], |
ad402b26 | 290 | UDF_NAME_LEN - 2 - utf_o->u_len); |
59285c28 JK |
291 | /* Valid character? */ |
292 | if (len >= 0) | |
293 | utf_o->u_len += len; | |
294 | else | |
295 | utf_o->u_name[utf_o->u_len++] = '?'; | |
1da177e4 | 296 | } |
cb00ea35 | 297 | utf_o->u_cmpID = 8; |
1da177e4 LT |
298 | |
299 | return utf_o->u_len; | |
300 | } | |
301 | ||
28de7948 | 302 | static int udf_NLStoCS0(struct nls_table *nls, dstring *ocu, struct ustr *uni, |
cb00ea35 | 303 | int length) |
1da177e4 | 304 | { |
59285c28 JK |
305 | int len; |
306 | unsigned i, max_val; | |
1da177e4 | 307 | uint16_t uni_char; |
bb00c898 | 308 | int u_len, u_ch; |
1da177e4 LT |
309 | |
310 | memset(ocu, 0, sizeof(dstring) * length); | |
311 | ocu[0] = 8; | |
312 | max_val = 0xffU; | |
bb00c898 | 313 | u_ch = 1; |
1da177e4 | 314 | |
28de7948 | 315 | try_again: |
1da177e4 | 316 | u_len = 0U; |
cb00ea35 | 317 | for (i = 0U; i < uni->u_len; i++) { |
bb00c898 AG |
318 | /* Name didn't fit? */ |
319 | if (u_len + 1 + u_ch >= length) | |
320 | return 0; | |
cb00ea35 | 321 | len = nls->char2uni(&uni->u_name[i], uni->u_len - i, &uni_char); |
59285c28 | 322 | if (!len) |
1da177e4 | 323 | continue; |
59285c28 JK |
324 | /* Invalid character, deal with it */ |
325 | if (len < 0) { | |
326 | len = 1; | |
327 | uni_char = '?'; | |
328 | } | |
1da177e4 | 329 | |
cb00ea35 | 330 | if (uni_char > max_val) { |
1da177e4 | 331 | max_val = 0xffffU; |
28de7948 | 332 | ocu[0] = (uint8_t)0x10U; |
bb00c898 | 333 | u_ch = 2; |
1da177e4 LT |
334 | goto try_again; |
335 | } | |
cb00ea35 | 336 | |
1da177e4 | 337 | if (max_val == 0xffffU) |
28de7948 CG |
338 | ocu[++u_len] = (uint8_t)(uni_char >> 8); |
339 | ocu[++u_len] = (uint8_t)(uni_char & 0xffU); | |
1da177e4 LT |
340 | i += len - 1; |
341 | } | |
342 | ||
28de7948 | 343 | ocu[length - 1] = (uint8_t)u_len + 1; |
1da177e4 LT |
344 | return u_len + 1; |
345 | } | |
346 | ||
0e5cc9a4 JK |
347 | int udf_get_filename(struct super_block *sb, uint8_t *sname, int slen, |
348 | uint8_t *dname, int dlen) | |
1da177e4 | 349 | { |
530f1a5e | 350 | struct ustr *filename, *unifilename; |
6ce63836 | 351 | int ret; |
1da177e4 | 352 | |
31f2566f FF |
353 | if (!slen) |
354 | return -EIO; | |
355 | ||
530f1a5e MS |
356 | filename = kmalloc(sizeof(struct ustr), GFP_NOFS); |
357 | if (!filename) | |
5ceb8b55 | 358 | return -ENOMEM; |
1da177e4 | 359 | |
530f1a5e | 360 | unifilename = kmalloc(sizeof(struct ustr), GFP_NOFS); |
5ceb8b55 FF |
361 | if (!unifilename) { |
362 | ret = -ENOMEM; | |
530f1a5e | 363 | goto out1; |
5ceb8b55 | 364 | } |
530f1a5e | 365 | |
31f2566f | 366 | udf_build_ustr_exact(unifilename, sname, slen); |
cb00ea35 | 367 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) { |
e9d4cf41 FF |
368 | ret = udf_CS0toUTF8(filename, unifilename); |
369 | if (ret < 0) { | |
4b11111a MS |
370 | udf_debug("Failed in udf_get_filename: sname = %s\n", |
371 | sname); | |
530f1a5e | 372 | goto out2; |
1da177e4 | 373 | } |
cb00ea35 | 374 | } else if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) { |
78fc2e69 FF |
375 | ret = udf_CS0toNLS(UDF_SB(sb)->s_nls_map, filename, |
376 | unifilename); | |
377 | if (ret < 0) { | |
4b11111a MS |
378 | udf_debug("Failed in udf_get_filename: sname = %s\n", |
379 | sname); | |
530f1a5e | 380 | goto out2; |
1da177e4 | 381 | } |
4b11111a | 382 | } else |
5dce54b7 | 383 | BUG(); |
530f1a5e | 384 | |
5ceb8b55 | 385 | ret = udf_translate_to_linux(dname, dlen, |
0e5cc9a4 | 386 | filename->u_name, filename->u_len, |
530f1a5e | 387 | unifilename->u_name, unifilename->u_len); |
6ce63836 FF |
388 | /* Zero length filename isn't valid... */ |
389 | if (ret == 0) | |
390 | ret = -EINVAL; | |
530f1a5e MS |
391 | out2: |
392 | kfree(unifilename); | |
393 | out1: | |
394 | kfree(filename); | |
5ceb8b55 | 395 | return ret; |
1da177e4 LT |
396 | } |
397 | ||
525e2c56 AG |
398 | int udf_put_filename(struct super_block *sb, const uint8_t *sname, int slen, |
399 | uint8_t *dname, int dlen) | |
1da177e4 LT |
400 | { |
401 | struct ustr unifilename; | |
402 | int namelen; | |
403 | ||
525e2c56 | 404 | if (!udf_char_to_ustr(&unifilename, sname, slen)) |
1da177e4 | 405 | return 0; |
1da177e4 | 406 | |
cb00ea35 | 407 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) { |
525e2c56 | 408 | namelen = udf_UTF8toCS0(dname, &unifilename, dlen); |
4b11111a | 409 | if (!namelen) |
1da177e4 | 410 | return 0; |
cb00ea35 | 411 | } else if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) { |
4b11111a | 412 | namelen = udf_NLStoCS0(UDF_SB(sb)->s_nls_map, dname, |
525e2c56 | 413 | &unifilename, dlen); |
4b11111a | 414 | if (!namelen) |
1da177e4 | 415 | return 0; |
4b11111a | 416 | } else |
1da177e4 LT |
417 | return 0; |
418 | ||
419 | return namelen; | |
420 | } | |
421 | ||
422 | #define ILLEGAL_CHAR_MARK '_' | |
28de7948 CG |
423 | #define EXT_MARK '.' |
424 | #define CRC_MARK '#' | |
425 | #define EXT_SIZE 5 | |
0e5cc9a4 JK |
426 | /* Number of chars we need to store generated CRC to make filename unique */ |
427 | #define CRC_LEN 5 | |
1da177e4 | 428 | |
0e5cc9a4 JK |
429 | static int udf_translate_to_linux(uint8_t *newName, int newLen, |
430 | uint8_t *udfName, int udfLen, | |
431 | uint8_t *fidName, int fidNameLen) | |
1da177e4 | 432 | { |
cb00ea35 | 433 | int index, newIndex = 0, needsCRC = 0; |
1da177e4 LT |
434 | int extIndex = 0, newExtIndex = 0, hasExt = 0; |
435 | unsigned short valueCRC; | |
436 | uint8_t curr; | |
1da177e4 | 437 | |
28de7948 CG |
438 | if (udfName[0] == '.' && |
439 | (udfLen == 1 || (udfLen == 2 && udfName[1] == '.'))) { | |
1da177e4 LT |
440 | needsCRC = 1; |
441 | newIndex = udfLen; | |
442 | memcpy(newName, udfName, udfLen); | |
cb00ea35 CG |
443 | } else { |
444 | for (index = 0; index < udfLen; index++) { | |
1da177e4 | 445 | curr = udfName[index]; |
cb00ea35 | 446 | if (curr == '/' || curr == 0) { |
1da177e4 LT |
447 | needsCRC = 1; |
448 | curr = ILLEGAL_CHAR_MARK; | |
4b11111a MS |
449 | while (index + 1 < udfLen && |
450 | (udfName[index + 1] == '/' || | |
451 | udfName[index + 1] == 0)) | |
1da177e4 | 452 | index++; |
4b11111a MS |
453 | } |
454 | if (curr == EXT_MARK && | |
455 | (udfLen - index - 1) <= EXT_SIZE) { | |
456 | if (udfLen == index + 1) | |
1da177e4 | 457 | hasExt = 0; |
4b11111a | 458 | else { |
1da177e4 LT |
459 | hasExt = 1; |
460 | extIndex = index; | |
461 | newExtIndex = newIndex; | |
462 | } | |
463 | } | |
0e5cc9a4 | 464 | if (newIndex < newLen) |
1da177e4 LT |
465 | newName[newIndex++] = curr; |
466 | else | |
467 | needsCRC = 1; | |
468 | } | |
469 | } | |
cb00ea35 | 470 | if (needsCRC) { |
1da177e4 LT |
471 | uint8_t ext[EXT_SIZE]; |
472 | int localExtIndex = 0; | |
473 | ||
cb00ea35 | 474 | if (hasExt) { |
1da177e4 | 475 | int maxFilenameLen; |
4b11111a MS |
476 | for (index = 0; |
477 | index < EXT_SIZE && extIndex + index + 1 < udfLen; | |
478 | index++) { | |
1da177e4 LT |
479 | curr = udfName[extIndex + index + 1]; |
480 | ||
cb00ea35 | 481 | if (curr == '/' || curr == 0) { |
1da177e4 LT |
482 | needsCRC = 1; |
483 | curr = ILLEGAL_CHAR_MARK; | |
4b11111a MS |
484 | while (extIndex + index + 2 < udfLen && |
485 | (index + 1 < EXT_SIZE && | |
486 | (udfName[extIndex + index + 2] == '/' || | |
487 | udfName[extIndex + index + 2] == 0))) | |
1da177e4 LT |
488 | index++; |
489 | } | |
490 | ext[localExtIndex++] = curr; | |
491 | } | |
0e5cc9a4 | 492 | maxFilenameLen = newLen - CRC_LEN - localExtIndex; |
1da177e4 LT |
493 | if (newIndex > maxFilenameLen) |
494 | newIndex = maxFilenameLen; | |
495 | else | |
496 | newIndex = newExtIndex; | |
0e5cc9a4 JK |
497 | } else if (newIndex > newLen - CRC_LEN) |
498 | newIndex = newLen - CRC_LEN; | |
1da177e4 | 499 | newName[newIndex++] = CRC_MARK; |
f845fced | 500 | valueCRC = crc_itu_t(0, fidName, fidNameLen); |
c7ff4821 AS |
501 | newName[newIndex++] = hex_asc_upper_hi(valueCRC >> 8); |
502 | newName[newIndex++] = hex_asc_upper_lo(valueCRC >> 8); | |
503 | newName[newIndex++] = hex_asc_upper_hi(valueCRC); | |
504 | newName[newIndex++] = hex_asc_upper_lo(valueCRC); | |
1da177e4 | 505 | |
cb00ea35 | 506 | if (hasExt) { |
1da177e4 | 507 | newName[newIndex++] = EXT_MARK; |
cb00ea35 | 508 | for (index = 0; index < localExtIndex; index++) |
1da177e4 LT |
509 | newName[newIndex++] = ext[index]; |
510 | } | |
511 | } | |
28de7948 | 512 | |
1da177e4 LT |
513 | return newIndex; |
514 | } |