diff options
Diffstat (limited to 'strings/ctype-simple.c')
| -rw-r--r-- | strings/ctype-simple.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/strings/ctype-simple.c b/strings/ctype-simple.c index ca0097579bd..152980dd305 100644 --- a/strings/ctype-simple.c +++ b/strings/ctype-simple.c @@ -1030,6 +1030,44 @@ uint my_lengthsp_8bit(CHARSET_INFO *cs __attribute__((unused)), } +int my_instr_simple(CHARSET_INFO *cs, + const char *big, uint b_length, + const char *small, uint s_length) +{ + register const uchar *str, *search, *end, *search_end; + + if (s_length <= b_length) + { + if (!s_length) + return 0; // Empty string is always found + + str= (const uchar*) big; + search= (const uchar*) small; + end= (const uchar*) big+b_length-s_length+1; + search_end= (const uchar*) small + s_length; + +skipp: + while (str != end) + { + if (cs->sort_order[*str++] == cs->sort_order[*search]) + { + register const uchar *i,*j; + + i= str; + j= search+1; + + while (j != search_end) + if (cs->sort_order[*i++] != cs->sort_order[*j++]) + goto skipp; + + return (int) (str- (const uchar*)big) -1; + } + } + } + return -1; +} + + MY_CHARSET_HANDLER my_charset_8bit_handler= { NULL, /* ismbchar */ @@ -1063,5 +1101,6 @@ MY_COLLATION_HANDLER my_collation_8bit_simple_ci_handler = my_like_range_simple, my_wildcmp_8bit, my_strcasecmp_8bit, + my_instr_simple, my_hash_sort_simple }; |