smb/server/unicode.c

17  * cifs_mapchar() - convert a host-endian char to proper char in codepage
20  * @cp:		codepage to which character should be converted
21  * @mapchar:	should character be mapped according to mapchars mount option?
24  * responsibility of the caller to ensure that the target buffer is large
25  * enough to hold the result of the conversion (at least NLS_MAX_CHARSET_SIZE).
42 	 * BB: Cannot handle remapping UNI_SLASH until all the calls to
96  * @from:	pointer to input string
101  * be after being converted to the given charset, not including any null
137  * smb_from_utf16() - convert utf16le string to local charset
138  * @to:		destination buffer
142  * @codepage:	codepage to which characters should be converted
143  * @mapchar:	should characters be remapped according to the mapchars option?
145  * Convert a little-endian utf16le string (as sent by the server) to a string
146  * in the provided codepage. The tolen and fromlen parameters are to ensure
154  * instead of straight UTF16-2. The linux nls routines however aren't able to
160 static int smb_from_utf16(char *to, const __le16 *from, int tolen, int fromlen,
171 	 * because the chars can be of varying widths, we need to take care
172 	 * not to overflow the destination buffer when we get close to the
173 	 * end of it. Until we get to this offset, we don't need to check
190 		 * check to see if converting this character might make the
199 		/* put converted char into 'to' buffer */
200 		charlen = cifs_mapchar(&to[outlen], ftmp, codepage, mapchar);
208 		 * (2 UTF-8 pairs divided to 2 UTF-16 pairs)
219 		to[outlen++] = 0;
225  * smb_strtoUTF16() - Convert character string to unicode string
226  * @to:		destination buffer
229  * @codepage:	codepage to which characters should be converted
233 int smb_strtoUTF16(__le16 *to, const char *from, int len,
238 	wchar_t wchar_to; /* needed to quiet sparse */
240 	/* special case for utf8 to handle no plane0 chars */
248 				     (wchar_t *)to, len);
254 		 * if fails fall back to UCS encoding as this
268 		put_unaligned_le16(wchar_to, &to[i]);
272 	put_unaligned_le16(0, &to[i]);
277  * smb_strndup_from_utf16() - copy a string from wire format to the local
284  * Take a string given by the server, convert it to the local codepage and
285  * put it in a new buffer. Returns a pointer to the new string or NULL on
322  * Convert 16 bit Unicode pathname to wire format from string in current code
328  * smbConvertToUTF16() - convert string from local charset to utf16
332  * @cp:		codepage to which characters should be converted
333  * @mapchar:	should characters be remapped according to the mapchars option?
335  * Convert 16 bit Unicode pathname to wire format from string in current code
383 		 * until all the calls to build_path_from_dentry are modified,
415 				/* 1-3bytes UTF-8 to 2bytes UTF-16 */
419 				 * 4bytes UTF-8(surrogate pair) to 4bytes UTF-16
420 				 * 7-8bytes UTF-8(IVS) divided to 2 UTF-16
428 				/* 5-6bytes UTF-8 to 6bytes UTF-16 */