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-rw-r--r--fs/udf/unicode.c630
1 files changed, 250 insertions, 380 deletions
diff --git a/fs/udf/unicode.c b/fs/udf/unicode.c
index e788a05aab83..3ff42f4437f3 100644
--- a/fs/udf/unicode.c
+++ b/fs/udf/unicode.c
@@ -28,199 +28,72 @@
28 28
29#include "udf_sb.h" 29#include "udf_sb.h"
30 30
31static int udf_translate_to_linux(uint8_t *, int, uint8_t *, int, uint8_t *, 31static int udf_uni2char_utf8(wchar_t uni,
32 int); 32 unsigned char *out,
33 33 int boundlen)
34static int udf_char_to_ustr(struct ustr *dest, const uint8_t *src, int strlen)
35{
36 if ((!dest) || (!src) || (!strlen) || (strlen > UDF_NAME_LEN - 2))
37 return 0;
38
39 memset(dest, 0, sizeof(struct ustr));
40 memcpy(dest->u_name, src, strlen);
41 dest->u_cmpID = 0x08;
42 dest->u_len = strlen;
43
44 return strlen;
45}
46
47/*
48 * udf_build_ustr
49 */
50int udf_build_ustr(struct ustr *dest, dstring *ptr, int size)
51{
52 int usesize;
53
54 if (!dest || !ptr || !size)
55 return -1;
56 BUG_ON(size < 2);
57
58 usesize = min_t(size_t, ptr[size - 1], sizeof(dest->u_name));
59 usesize = min(usesize, size - 2);
60 dest->u_cmpID = ptr[0];
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);
64
65 return 0;
66}
67
68/*
69 * udf_build_ustr_exact
70 */
71static void udf_build_ustr_exact(struct ustr *dest, dstring *ptr, int exactsize)
72{
73 memset(dest, 0, sizeof(struct ustr));
74 dest->u_cmpID = ptr[0];
75 dest->u_len = exactsize - 1;
76 memcpy(dest->u_name, ptr + 1, exactsize - 1);
77}
78
79/*
80 * udf_CS0toUTF8
81 *
82 * PURPOSE
83 * Convert OSTA Compressed Unicode to the UTF-8 equivalent.
84 *
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
92 * <return> >= 0 on success.
93 *
94 * HISTORY
95 * November 12, 1997 - Andrew E. Mileski
96 * Written, tested, and released.
97 */
98int udf_CS0toUTF8(struct ustr *utf_o, const struct ustr *ocu_i)
99{ 34{
100 const uint8_t *ocu; 35 int u_len = 0;
101 uint8_t cmp_id, ocu_len; 36
102 int i; 37 if (boundlen <= 0)
103 38 return -ENAMETOOLONG;
104 ocu_len = ocu_i->u_len; 39
105 if (ocu_len == 0) { 40 if (uni < 0x80) {
106 memset(utf_o, 0, sizeof(struct ustr)); 41 out[u_len++] = (unsigned char)uni;
107 return 0; 42 } else if (uni < 0x800) {
108 } 43 if (boundlen < 2)
109 44 return -ENAMETOOLONG;
110 cmp_id = ocu_i->u_cmpID; 45 out[u_len++] = (unsigned char)(0xc0 | (uni >> 6));
111 if (cmp_id != 8 && cmp_id != 16) { 46 out[u_len++] = (unsigned char)(0x80 | (uni & 0x3f));
112 memset(utf_o, 0, sizeof(struct ustr)); 47 } else {
113 pr_err("unknown compression code (%d) stri=%s\n", 48 if (boundlen < 3)
114 cmp_id, ocu_i->u_name); 49 return -ENAMETOOLONG;
115 return -EINVAL; 50 out[u_len++] = (unsigned char)(0xe0 | (uni >> 12));
116 } 51 out[u_len++] = (unsigned char)(0x80 | ((uni >> 6) & 0x3f));
117 52 out[u_len++] = (unsigned char)(0x80 | (uni & 0x3f));
118 ocu = ocu_i->u_name;
119 utf_o->u_len = 0;
120 for (i = 0; (i < ocu_len) && (utf_o->u_len <= (UDF_NAME_LEN - 3));) {
121
122 /* Expand OSTA compressed Unicode to Unicode */
123 uint32_t c = ocu[i++];
124 if (cmp_id == 16)
125 c = (c << 8) | ocu[i++];
126
127 /* Compress Unicode to UTF-8 */
128 if (c < 0x80U)
129 utf_o->u_name[utf_o->u_len++] = (uint8_t)c;
130 else if (c < 0x800U) {
131 if (utf_o->u_len > (UDF_NAME_LEN - 4))
132 break;
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));
137 } else {
138 if (utf_o->u_len > (UDF_NAME_LEN - 5))
139 break;
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));
147 }
148 } 53 }
149 utf_o->u_cmpID = 8; 54 return u_len;
150
151 return utf_o->u_len;
152} 55}
153 56
154/* 57static int udf_char2uni_utf8(const unsigned char *in,
155 * 58 int boundlen,
156 * udf_UTF8toCS0 59 wchar_t *uni)
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 */
177static int udf_UTF8toCS0(dstring *ocu, struct ustr *utf, int length)
178{ 60{
179 unsigned c, i, max_val, utf_char; 61 unsigned int utf_char;
180 int utf_cnt, u_len, u_ch; 62 unsigned char c;
181 63 int utf_cnt, u_len;
182 memset(ocu, 0, sizeof(dstring) * length);
183 ocu[0] = 8;
184 max_val = 0xffU;
185 u_ch = 1;
186 64
187try_again: 65 utf_char = 0;
188 u_len = 0U; 66 utf_cnt = 0;
189 utf_char = 0U; 67 for (u_len = 0; u_len < boundlen;) {
190 utf_cnt = 0U; 68 c = in[u_len++];
191 for (i = 0U; i < utf->u_len; i++) {
192 /* Name didn't fit? */
193 if (u_len + 1 + u_ch >= length)
194 return 0;
195
196 c = (uint8_t)utf->u_name[i];
197 69
198 /* Complete a multi-byte UTF-8 character */ 70 /* Complete a multi-byte UTF-8 character */
199 if (utf_cnt) { 71 if (utf_cnt) {
200 utf_char = (utf_char << 6) | (c & 0x3fU); 72 utf_char = (utf_char << 6) | (c & 0x3f);
201 if (--utf_cnt) 73 if (--utf_cnt)
202 continue; 74 continue;
203 } else { 75 } else {
204 /* Check for a multi-byte UTF-8 character */ 76 /* Check for a multi-byte UTF-8 character */
205 if (c & 0x80U) { 77 if (c & 0x80) {
206 /* Start a multi-byte UTF-8 character */ 78 /* Start a multi-byte UTF-8 character */
207 if ((c & 0xe0U) == 0xc0U) { 79 if ((c & 0xe0) == 0xc0) {
208 utf_char = c & 0x1fU; 80 utf_char = c & 0x1f;
209 utf_cnt = 1; 81 utf_cnt = 1;
210 } else if ((c & 0xf0U) == 0xe0U) { 82 } else if ((c & 0xf0) == 0xe0) {
211 utf_char = c & 0x0fU; 83 utf_char = c & 0x0f;
212 utf_cnt = 2; 84 utf_cnt = 2;
213 } else if ((c & 0xf8U) == 0xf0U) { 85 } else if ((c & 0xf8) == 0xf0) {
214 utf_char = c & 0x07U; 86 utf_char = c & 0x07;
215 utf_cnt = 3; 87 utf_cnt = 3;
216 } else if ((c & 0xfcU) == 0xf8U) { 88 } else if ((c & 0xfc) == 0xf8) {
217 utf_char = c & 0x03U; 89 utf_char = c & 0x03;
218 utf_cnt = 4; 90 utf_cnt = 4;
219 } else if ((c & 0xfeU) == 0xfcU) { 91 } else if ((c & 0xfe) == 0xfc) {
220 utf_char = c & 0x01U; 92 utf_char = c & 0x01;
221 utf_cnt = 5; 93 utf_cnt = 5;
222 } else { 94 } else {
223 goto error_out; 95 utf_cnt = -1;
96 break;
224 } 97 }
225 continue; 98 continue;
226 } else { 99 } else {
@@ -228,97 +101,216 @@ try_again:
228 utf_char = c; 101 utf_char = c;
229 } 102 }
230 } 103 }
231 104 *uni = utf_char;
232 /* Choose no compression if necessary */ 105 break;
233 if (utf_char > max_val) {
234 if (max_val == 0xffU) {
235 max_val = 0xffffU;
236 ocu[0] = (uint8_t)0x10U;
237 u_ch = 2;
238 goto try_again;
239 }
240 goto error_out;
241 }
242
243 if (max_val == 0xffffU)
244 ocu[++u_len] = (uint8_t)(utf_char >> 8);
245 ocu[++u_len] = (uint8_t)(utf_char & 0xffU);
246 } 106 }
247
248 if (utf_cnt) { 107 if (utf_cnt) {
249error_out: 108 *uni = '?';
250 ocu[++u_len] = '?'; 109 return -EINVAL;
251 printk(KERN_DEBUG pr_fmt("bad UTF-8 character\n"));
252 } 110 }
111 return u_len;
112}
253 113
254 ocu[length - 1] = (uint8_t)u_len + 1; 114#define ILLEGAL_CHAR_MARK '_'
115#define EXT_MARK '.'
116#define CRC_MARK '#'
117#define EXT_SIZE 5
118/* Number of chars we need to store generated CRC to make filename unique */
119#define CRC_LEN 5
120
121static int udf_name_conv_char(uint8_t *str_o, int str_o_max_len,
122 int *str_o_idx,
123 const uint8_t *str_i, int str_i_max_len,
124 int *str_i_idx,
125 int u_ch, int *needsCRC,
126 int (*conv_f)(wchar_t, unsigned char *, int),
127 int translate)
128{
129 uint32_t c;
130 int illChar = 0;
131 int len, gotch = 0;
132
133 for (; (!gotch) && (*str_i_idx < str_i_max_len); *str_i_idx += u_ch) {
134 if (*str_o_idx >= str_o_max_len) {
135 *needsCRC = 1;
136 return gotch;
137 }
255 138
256 return u_len + 1; 139 /* Expand OSTA compressed Unicode to Unicode */
140 c = str_i[*str_i_idx];
141 if (u_ch > 1)
142 c = (c << 8) | str_i[*str_i_idx + 1];
143
144 if (translate && (c == '/' || c == 0))
145 illChar = 1;
146 else if (illChar)
147 break;
148 else
149 gotch = 1;
150 }
151 if (illChar) {
152 *needsCRC = 1;
153 c = ILLEGAL_CHAR_MARK;
154 gotch = 1;
155 }
156 if (gotch) {
157 len = conv_f(c, &str_o[*str_o_idx], str_o_max_len - *str_o_idx);
158 /* Valid character? */
159 if (len >= 0)
160 *str_o_idx += len;
161 else if (len == -ENAMETOOLONG) {
162 *needsCRC = 1;
163 gotch = 0;
164 } else {
165 str_o[(*str_o_idx)++] = '?';
166 *needsCRC = 1;
167 }
168 }
169 return gotch;
257} 170}
258 171
259static int udf_CS0toNLS(struct nls_table *nls, struct ustr *utf_o, 172static int udf_name_from_CS0(uint8_t *str_o, int str_max_len,
260 const struct ustr *ocu_i) 173 const uint8_t *ocu, int ocu_len,
174 int (*conv_f)(wchar_t, unsigned char *, int),
175 int translate)
261{ 176{
262 const uint8_t *ocu; 177 uint32_t c;
263 uint8_t cmp_id, ocu_len; 178 uint8_t cmp_id;
264 int i, len; 179 int idx, len;
180 int u_ch;
181 int needsCRC = 0;
182 int ext_i_len, ext_max_len;
183 int str_o_len = 0; /* Length of resulting output */
184 int ext_o_len = 0; /* Extension output length */
185 int ext_crc_len = 0; /* Extension output length if used with CRC */
186 int i_ext = -1; /* Extension position in input buffer */
187 int o_crc = 0; /* Rightmost possible output pos for CRC+ext */
188 unsigned short valueCRC;
189 uint8_t ext[EXT_SIZE * NLS_MAX_CHARSET_SIZE + 1];
190 uint8_t crc[CRC_LEN];
265 191
192 if (str_max_len <= 0)
193 return 0;
266 194
267 ocu_len = ocu_i->u_len;
268 if (ocu_len == 0) { 195 if (ocu_len == 0) {
269 memset(utf_o, 0, sizeof(struct ustr)); 196 memset(str_o, 0, str_max_len);
270 return 0; 197 return 0;
271 } 198 }
272 199
273 cmp_id = ocu_i->u_cmpID; 200 cmp_id = ocu[0];
274 if (cmp_id != 8 && cmp_id != 16) { 201 if (cmp_id != 8 && cmp_id != 16) {
275 memset(utf_o, 0, sizeof(struct ustr)); 202 memset(str_o, 0, str_max_len);
276 pr_err("unknown compression code (%d) stri=%s\n", 203 pr_err("unknown compression code (%d)\n", cmp_id);
277 cmp_id, ocu_i->u_name);
278 return -EINVAL; 204 return -EINVAL;
279 } 205 }
206 u_ch = cmp_id >> 3;
280 207
281 ocu = ocu_i->u_name; 208 ocu++;
282 utf_o->u_len = 0; 209 ocu_len--;
283 for (i = 0; (i < ocu_len) && (utf_o->u_len <= (UDF_NAME_LEN - 3));) {
284 /* Expand OSTA compressed Unicode to Unicode */
285 uint32_t c = ocu[i++];
286 if (cmp_id == 16)
287 c = (c << 8) | ocu[i++];
288 210
289 len = nls->uni2char(c, &utf_o->u_name[utf_o->u_len], 211 if (ocu_len % u_ch) {
290 UDF_NAME_LEN - 2 - utf_o->u_len); 212 pr_err("incorrect filename length (%d)\n", ocu_len + 1);
291 /* Valid character? */ 213 return -EINVAL;
292 if (len >= 0) 214 }
293 utf_o->u_len += len; 215
294 else 216 if (translate) {
295 utf_o->u_name[utf_o->u_len++] = '?'; 217 /* Look for extension */
218 for (idx = ocu_len - u_ch, ext_i_len = 0;
219 (idx >= 0) && (ext_i_len < EXT_SIZE);
220 idx -= u_ch, ext_i_len++) {
221 c = ocu[idx];
222 if (u_ch > 1)
223 c = (c << 8) | ocu[idx + 1];
224
225 if (c == EXT_MARK) {
226 if (ext_i_len)
227 i_ext = idx;
228 break;
229 }
230 }
231 if (i_ext >= 0) {
232 /* Convert extension */
233 ext_max_len = min_t(int, sizeof(ext), str_max_len);
234 ext[ext_o_len++] = EXT_MARK;
235 idx = i_ext + u_ch;
236 while (udf_name_conv_char(ext, ext_max_len, &ext_o_len,
237 ocu, ocu_len, &idx,
238 u_ch, &needsCRC,
239 conv_f, translate)) {
240 if ((ext_o_len + CRC_LEN) < str_max_len)
241 ext_crc_len = ext_o_len;
242 }
243 }
296 } 244 }
297 utf_o->u_cmpID = 8;
298 245
299 return utf_o->u_len; 246 idx = 0;
247 while (1) {
248 if (translate && (idx == i_ext)) {
249 if (str_o_len > (str_max_len - ext_o_len))
250 needsCRC = 1;
251 break;
252 }
253
254 if (!udf_name_conv_char(str_o, str_max_len, &str_o_len,
255 ocu, ocu_len, &idx,
256 u_ch, &needsCRC, conv_f, translate))
257 break;
258
259 if (translate &&
260 (str_o_len <= (str_max_len - ext_o_len - CRC_LEN)))
261 o_crc = str_o_len;
262 }
263
264 if (translate) {
265 if (str_o_len <= 2 && str_o[0] == '.' &&
266 (str_o_len == 1 || str_o[1] == '.'))
267 needsCRC = 1;
268 if (needsCRC) {
269 str_o_len = o_crc;
270 valueCRC = crc_itu_t(0, ocu, ocu_len);
271 crc[0] = CRC_MARK;
272 crc[1] = hex_asc_upper_hi(valueCRC >> 8);
273 crc[2] = hex_asc_upper_lo(valueCRC >> 8);
274 crc[3] = hex_asc_upper_hi(valueCRC);
275 crc[4] = hex_asc_upper_lo(valueCRC);
276 len = min_t(int, CRC_LEN, str_max_len - str_o_len);
277 memcpy(&str_o[str_o_len], crc, len);
278 str_o_len += len;
279 ext_o_len = ext_crc_len;
280 }
281 if (ext_o_len > 0) {
282 memcpy(&str_o[str_o_len], ext, ext_o_len);
283 str_o_len += ext_o_len;
284 }
285 }
286
287 return str_o_len;
300} 288}
301 289
302static int udf_NLStoCS0(struct nls_table *nls, dstring *ocu, struct ustr *uni, 290static int udf_name_to_CS0(uint8_t *ocu, int ocu_max_len,
303 int length) 291 const uint8_t *str_i, int str_len,
292 int (*conv_f)(const unsigned char *, int, wchar_t *))
304{ 293{
305 int len; 294 int i, len;
306 unsigned i, max_val; 295 unsigned int max_val;
307 uint16_t uni_char; 296 wchar_t uni_char;
308 int u_len, u_ch; 297 int u_len, u_ch;
309 298
310 memset(ocu, 0, sizeof(dstring) * length); 299 if (ocu_max_len <= 0)
300 return 0;
301
302 memset(ocu, 0, ocu_max_len);
311 ocu[0] = 8; 303 ocu[0] = 8;
312 max_val = 0xffU; 304 max_val = 0xff;
313 u_ch = 1; 305 u_ch = 1;
314 306
315try_again: 307try_again:
316 u_len = 0U; 308 u_len = 1;
317 for (i = 0U; i < uni->u_len; i++) { 309 for (i = 0; i < str_len; i++) {
318 /* Name didn't fit? */ 310 /* Name didn't fit? */
319 if (u_len + 1 + u_ch >= length) 311 if (u_len + u_ch > ocu_max_len)
320 return 0; 312 return 0;
321 len = nls->char2uni(&uni->u_name[i], uni->u_len - i, &uni_char); 313 len = conv_f(&str_i[i], str_len - i, &uni_char);
322 if (!len) 314 if (!len)
323 continue; 315 continue;
324 /* Invalid character, deal with it */ 316 /* Invalid character, deal with it */
@@ -328,187 +320,65 @@ try_again:
328 } 320 }
329 321
330 if (uni_char > max_val) { 322 if (uni_char > max_val) {
331 max_val = 0xffffU; 323 max_val = 0xffff;
332 ocu[0] = (uint8_t)0x10U; 324 ocu[0] = 0x10;
333 u_ch = 2; 325 u_ch = 2;
334 goto try_again; 326 goto try_again;
335 } 327 }
336 328
337 if (max_val == 0xffffU) 329 if (max_val == 0xffff)
338 ocu[++u_len] = (uint8_t)(uni_char >> 8); 330 ocu[u_len++] = (uint8_t)(uni_char >> 8);
339 ocu[++u_len] = (uint8_t)(uni_char & 0xffU); 331 ocu[u_len++] = (uint8_t)(uni_char & 0xff);
340 i += len - 1; 332 i += len - 1;
341 } 333 }
342 334
343 ocu[length - 1] = (uint8_t)u_len + 1; 335 return u_len;
344 return u_len + 1;
345} 336}
346 337
347int udf_get_filename(struct super_block *sb, uint8_t *sname, int slen, 338int udf_CS0toUTF8(uint8_t *utf_o, int o_len, const uint8_t *ocu_i, int i_len)
339{
340 return udf_name_from_CS0(utf_o, o_len, ocu_i, i_len,
341 udf_uni2char_utf8, 0);
342}
343
344int udf_get_filename(struct super_block *sb, const uint8_t *sname, int slen,
348 uint8_t *dname, int dlen) 345 uint8_t *dname, int dlen)
349{ 346{
350 struct ustr *filename, *unifilename; 347 int (*conv_f)(wchar_t, unsigned char *, int);
351 int ret; 348 int ret;
352 349
353 if (!slen) 350 if (!slen)
354 return -EIO; 351 return -EIO;
355 352
356 filename = kmalloc(sizeof(struct ustr), GFP_NOFS); 353 if (dlen <= 0)
357 if (!filename) 354 return 0;
358 return -ENOMEM;
359
360 unifilename = kmalloc(sizeof(struct ustr), GFP_NOFS);
361 if (!unifilename) {
362 ret = -ENOMEM;
363 goto out1;
364 }
365 355
366 udf_build_ustr_exact(unifilename, sname, slen);
367 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) { 356 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) {
368 ret = udf_CS0toUTF8(filename, unifilename); 357 conv_f = udf_uni2char_utf8;
369 if (ret < 0) {
370 udf_debug("Failed in udf_get_filename: sname = %s\n",
371 sname);
372 goto out2;
373 }
374 } else if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) { 358 } else if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) {
375 ret = udf_CS0toNLS(UDF_SB(sb)->s_nls_map, filename, 359 conv_f = UDF_SB(sb)->s_nls_map->uni2char;
376 unifilename);
377 if (ret < 0) {
378 udf_debug("Failed in udf_get_filename: sname = %s\n",
379 sname);
380 goto out2;
381 }
382 } else 360 } else
383 BUG(); 361 BUG();
384 362
385 ret = udf_translate_to_linux(dname, dlen, 363 ret = udf_name_from_CS0(dname, dlen, sname, slen, conv_f, 1);
386 filename->u_name, filename->u_len,
387 unifilename->u_name, unifilename->u_len);
388 /* Zero length filename isn't valid... */ 364 /* Zero length filename isn't valid... */
389 if (ret == 0) 365 if (ret == 0)
390 ret = -EINVAL; 366 ret = -EINVAL;
391out2:
392 kfree(unifilename);
393out1:
394 kfree(filename);
395 return ret; 367 return ret;
396} 368}
397 369
398int udf_put_filename(struct super_block *sb, const uint8_t *sname, 370int udf_put_filename(struct super_block *sb, const uint8_t *sname, int slen,
399 uint8_t *dname, int flen) 371 uint8_t *dname, int dlen)
400{ 372{
401 struct ustr unifilename; 373 int (*conv_f)(const unsigned char *, int, wchar_t *);
402 int namelen;
403
404 if (!udf_char_to_ustr(&unifilename, sname, flen))
405 return 0;
406 374
407 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) { 375 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) {
408 namelen = udf_UTF8toCS0(dname, &unifilename, UDF_NAME_LEN); 376 conv_f = udf_char2uni_utf8;
409 if (!namelen)
410 return 0;
411 } else if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) { 377 } else if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) {
412 namelen = udf_NLStoCS0(UDF_SB(sb)->s_nls_map, dname, 378 conv_f = UDF_SB(sb)->s_nls_map->char2uni;
413 &unifilename, UDF_NAME_LEN);
414 if (!namelen)
415 return 0;
416 } else 379 } else
417 return 0; 380 BUG();
418 381
419 return namelen; 382 return udf_name_to_CS0(dname, dlen, sname, slen, conv_f);
420} 383}
421 384
422#define ILLEGAL_CHAR_MARK '_'
423#define EXT_MARK '.'
424#define CRC_MARK '#'
425#define EXT_SIZE 5
426/* Number of chars we need to store generated CRC to make filename unique */
427#define CRC_LEN 5
428
429static int udf_translate_to_linux(uint8_t *newName, int newLen,
430 uint8_t *udfName, int udfLen,
431 uint8_t *fidName, int fidNameLen)
432{
433 int index, newIndex = 0, needsCRC = 0;
434 int extIndex = 0, newExtIndex = 0, hasExt = 0;
435 unsigned short valueCRC;
436 uint8_t curr;
437
438 if (udfName[0] == '.' &&
439 (udfLen == 1 || (udfLen == 2 && udfName[1] == '.'))) {
440 needsCRC = 1;
441 newIndex = udfLen;
442 memcpy(newName, udfName, udfLen);
443 } else {
444 for (index = 0; index < udfLen; index++) {
445 curr = udfName[index];
446 if (curr == '/' || curr == 0) {
447 needsCRC = 1;
448 curr = ILLEGAL_CHAR_MARK;
449 while (index + 1 < udfLen &&
450 (udfName[index + 1] == '/' ||
451 udfName[index + 1] == 0))
452 index++;
453 }
454 if (curr == EXT_MARK &&
455 (udfLen - index - 1) <= EXT_SIZE) {
456 if (udfLen == index + 1)
457 hasExt = 0;
458 else {
459 hasExt = 1;
460 extIndex = index;
461 newExtIndex = newIndex;
462 }
463 }
464 if (newIndex < newLen)
465 newName[newIndex++] = curr;
466 else
467 needsCRC = 1;
468 }
469 }
470 if (needsCRC) {
471 uint8_t ext[EXT_SIZE];
472 int localExtIndex = 0;
473
474 if (hasExt) {
475 int maxFilenameLen;
476 for (index = 0;
477 index < EXT_SIZE && extIndex + index + 1 < udfLen;
478 index++) {
479 curr = udfName[extIndex + index + 1];
480
481 if (curr == '/' || curr == 0) {
482 needsCRC = 1;
483 curr = ILLEGAL_CHAR_MARK;
484 while (extIndex + index + 2 < udfLen &&
485 (index + 1 < EXT_SIZE &&
486 (udfName[extIndex + index + 2] == '/' ||
487 udfName[extIndex + index + 2] == 0)))
488 index++;
489 }
490 ext[localExtIndex++] = curr;
491 }
492 maxFilenameLen = newLen - CRC_LEN - localExtIndex;
493 if (newIndex > maxFilenameLen)
494 newIndex = maxFilenameLen;
495 else
496 newIndex = newExtIndex;
497 } else if (newIndex > newLen - CRC_LEN)
498 newIndex = newLen - CRC_LEN;
499 newName[newIndex++] = CRC_MARK;
500 valueCRC = crc_itu_t(0, fidName, fidNameLen);
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);
505
506 if (hasExt) {
507 newName[newIndex++] = EXT_MARK;
508 for (index = 0; index < localExtIndex; index++)
509 newName[newIndex++] = ext[index];
510 }
511 }
512
513 return newIndex;
514}
generated by cgit v1.2.2 (git 2.25.0) at 2025-04-26 08:05:46 -0400