diff options
Diffstat (limited to 'fs/cifs/cifs_unicode.c')
| -rw-r--r-- | fs/cifs/cifs_unicode.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/fs/cifs/cifs_unicode.c b/fs/cifs/cifs_unicode.c index 8389f359b03d..614512573c67 100644 --- a/fs/cifs/cifs_unicode.c +++ b/fs/cifs/cifs_unicode.c @@ -26,6 +26,37 @@ #include "cifs_debug.h" /* + * cifs_ucs2_bytes - how long will a string be after conversion? + * @ucs - pointer to input string + * @maxbytes - don't go past this many bytes of input string + * @codepage - destination codepage + * + * Walk a ucs2le string and return the number of bytes that the string will + * be after being converted to the given charset, not including any null + * termination required. Don't walk past maxbytes in the source buffer. + */ +int +cifs_ucs2_bytes(const __le16 *from, int maxbytes, + const struct nls_table *codepage) +{ + int i; + int charlen, outlen = 0; + int maxwords = maxbytes / 2; + char tmp[NLS_MAX_CHARSET_SIZE]; + + for (i = 0; from[i] && i < maxwords; i++) { + charlen = codepage->uni2char(le16_to_cpu(from[i]), tmp, + NLS_MAX_CHARSET_SIZE); + if (charlen > 0) + outlen += charlen; + else + outlen++; + } + + return outlen; +} + +/* * cifs_mapchar - convert a little-endian char to proper char in codepage * @target - where converted character should be copied * @src_char - 2 byte little-endian source character |