diff options
Diffstat (limited to 'source3/lib/util_unistr.c')
| -rw-r--r-- | source3/lib/util_unistr.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/source3/lib/util_unistr.c b/source3/lib/util_unistr.c index c666155f9f..812859000a 100644 --- a/source3/lib/util_unistr.c +++ b/source3/lib/util_unistr.c @@ -31,6 +31,14 @@ static smb_ucs2_t *upcase_table; static smb_ucs2_t *lowcase_table; static uint8 *valid_table; +/** + * This table says which Unicode characters are valid dos + * characters. + * + * Each value is just a single bit. + **/ +static uint8 doschar_table[8192]; /* 65536 characters / 8 bits/byte */ + /******************************************************************* load the case handling tables @@ -85,6 +93,21 @@ void load_case_tables(void) */ static int check_dos_char(smb_ucs2_t c) { + static int initialized = False; + + if (!initialized) { + initialized = True; + init_doschar_table(); + } + + /* Find the right byte, and right bit within the byte; return + * 1 or 0 */ + return (doschar_table[(c & 0xffff) / 8] & (1 << (c & 7))) != 0; +} + + +static int check_dos_char_slowly(smb_ucs2_t c) +{ char buf[10]; smb_ucs2_t c2 = 0; int len1, len2; @@ -95,6 +118,31 @@ static int check_dos_char(smb_ucs2_t c) return (c == c2); } + +/** + * Fill out doschar table the hard way, by examining each character + **/ +void init_doschar_table(void) +{ + int i, j, byteval; + + /* For each byte of packed table */ + + for (i = 0; i <= 0xffff; i += 8) { + byteval = 0; + for (j = 0; j <= 7; j++) { + smb_ucs2_t c; + + c = i + j; + + if (check_dos_char_slowly(c)) + byteval |= 1 << j; + } + doschar_table[i/8] = byteval; + } +} + + /** * Load the valid character map table from <tt>valid.dat</tt> or * create from the configured codepage. |