diff options
Diffstat (limited to 'strings/ctype-big5.c')
| -rw-r--r-- | strings/ctype-big5.c | 86 |
1 files changed, 3 insertions, 83 deletions
diff --git a/strings/ctype-big5.c b/strings/ctype-big5.c index 3da307b82fc..2cb40c266d2 100644 --- a/strings/ctype-big5.c +++ b/strings/ctype-big5.c @@ -377,86 +377,6 @@ static int my_strxfrm_big5(uchar *dest, const uchar *src, int len) #endif -/* -** Calculate min_str and max_str that ranges a LIKE string. -** Arguments: -** ptr Pointer to LIKE string. -** ptr_length Length of LIKE string. -** escape Escape character in LIKE. (Normally '\'). -** All escape characters should be removed from min_str and max_str -** res_length Length of min_str and max_str. -** min_str Smallest case sensitive string that ranges LIKE. -** Should be space padded to res_length. -** max_str Largest case sensitive string that ranges LIKE. -** Normally padded with the biggest character sort value. -** -** The function should return 0 if ok and 1 if the LIKE string can't be -** optimized ! -*/ - -#define max_sort_char ((char) 255) - -static my_bool my_like_range_big5(CHARSET_INFO *cs __attribute__((unused)), - const char *ptr,size_t ptr_length, - pbool escape, pbool w_one, pbool w_many, - size_t res_length, - char *min_str, char *max_str, - size_t *min_length, size_t *max_length) -{ - const char *end= ptr + ptr_length; - char *min_org=min_str; - char *min_end=min_str+res_length; - size_t charlen= res_length / cs->mbmaxlen; - - for (; ptr != end && min_str != min_end && charlen > 0; ptr++, charlen--) - { - if (ptr+1 != end && isbig5code(ptr[0],ptr[1])) - { - *min_str++= *max_str++ = *ptr++; - *min_str++= *max_str++ = *ptr; - continue; - } - if (*ptr == escape && ptr+1 != end) - { - ptr++; /* Skip escape */ - if (isbig5code(ptr[0], ptr[1])) - *min_str++= *max_str++ = *ptr++; - if (min_str < min_end) - *min_str++= *max_str++= *ptr; - continue; - } - if (*ptr == w_one) /* '_' in SQL */ - { - *min_str++='\0'; /* This should be min char */ - *max_str++=max_sort_char; - continue; - } - if (*ptr == w_many) /* '%' in SQL */ - { - /* - Calculate length of keys: - 'a\0\0... is the smallest possible string when we have space expand - a\ff\ff... is the biggest possible string - */ - *min_length= ((cs->state & MY_CS_BINSORT) ? (size_t) (min_str - min_org) : - res_length); - *max_length= res_length; - do { - *min_str++ = 0; - *max_str++ = max_sort_char; - } while (min_str != min_end); - return 0; - } - *min_str++= *max_str++ = *ptr; - } - - *min_length= *max_length= (size_t) (min_str-min_org); - while (min_str != min_end) - *min_str++= *max_str++= ' '; - return 0; -} - - static uint ismbchar_big5(CHARSET_INFO *cs __attribute__((unused)), const char* p, const char *e) { @@ -6338,7 +6258,7 @@ static MY_COLLATION_HANDLER my_collation_big5_chinese_ci_handler = my_strnncollsp_big5, my_strnxfrm_big5, my_strnxfrmlen_simple, - my_like_range_big5, + my_like_range_mb, my_wildcmp_mb, my_strcasecmp_mb, my_instr_mb, @@ -6402,7 +6322,7 @@ CHARSET_INFO my_charset_big5_chinese_ci= 1, /* mbminlen */ 2, /* mbmaxlen */ 0, /* min_sort_char */ - 255, /* max_sort_char */ + 0xF9D5, /* max_sort_char */ ' ', /* pad char */ 1, /* escape_with_backslash_is_dangerous */ &my_charset_big5_handler, @@ -6435,7 +6355,7 @@ CHARSET_INFO my_charset_big5_bin= 1, /* mbminlen */ 2, /* mbmaxlen */ 0, /* min_sort_char */ - 255, /* max_sort_char */ + 0xF9FE, /* max_sort_char */ ' ', /* pad char */ 1, /* escape_with_backslash_is_dangerous */ &my_charset_big5_handler, |