diff options
Diffstat (limited to 'source3/lib/util_str.c')
| -rw-r--r-- | source3/lib/util_str.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/source3/lib/util_str.c b/source3/lib/util_str.c index 200f4ce696..e3dd3124a5 100644 --- a/source3/lib/util_str.c +++ b/source3/lib/util_str.c @@ -900,6 +900,16 @@ char *strrchr_m(const char *s, char c) ********************************************************************/ void strlower_m(char *s) { + /* this is quite a common operation, so we want it to be + fast. We optimise for the ascii case, knowing that all our + supported multi-byte character sets are ascii-compatible + (ie. they match for the first 128 chars) */ + while (*s && !(((unsigned char)s[0]) & 0x7F)) { + *s++ = tolower((unsigned char)*s); + } + + if (!*s) return; + /* I assume that lowercased string takes the same number of bytes * as source string even in UTF-8 encoding. (VIV) */ unix_strlower(s,strlen(s)+1,s,strlen(s)+1); @@ -910,6 +920,16 @@ void strlower_m(char *s) ********************************************************************/ void strupper_m(char *s) { + /* this is quite a common operation, so we want it to be + fast. We optimise for the ascii case, knowing that all our + supported multi-byte character sets are ascii-compatible + (ie. they match for the first 128 chars) */ + while (*s && !(((unsigned char)s[0]) & 0x7F)) { + *s++ = toupper((unsigned char)*s); + } + + if (!*s) return; + /* I assume that lowercased string takes the same number of bytes * as source string even in multibyte encoding. (VIV) */ unix_strupper(s,strlen(s)+1,s,strlen(s)+1); |