diff options
Diffstat (limited to 'strings')
| -rw-r--r-- | strings/ctype-bin.c | 25 | ||||
| -rw-r--r-- | strings/ctype-mb.c | 7 | ||||
| -rw-r--r-- | strings/ctype-ucs2.c | 5 | ||||
| -rw-r--r-- | strings/strtod.c | 55 |
4 files changed, 73 insertions, 19 deletions
diff --git a/strings/ctype-bin.c b/strings/ctype-bin.c index e9de0ade557..f9d29ca1739 100644 --- a/strings/ctype-bin.c +++ b/strings/ctype-bin.c @@ -271,6 +271,29 @@ static int my_wc_mb_bin(CHARSET_INFO *cs __attribute__((unused)), } +void my_hash_sort_8bit_bin(CHARSET_INFO *cs __attribute__((unused)), + const uchar *key, uint len,ulong *nr1, ulong *nr2) +{ + const uchar *pos = key; + + key+= len; + + /* + Remove trailing spaces. We have to do this to be able to compare + 'A ' and 'A' as identical + */ + while (key > pos && key[-1] == ' ') + key--; + + for (; pos < (uchar*) key ; pos++) + { + nr1[0]^=(ulong) ((((uint) nr1[0] & 63)+nr2[0]) * + ((uint)*pos)) + (nr1[0] << 8); + nr2[0]+=3; + } +} + + void my_hash_sort_bin(CHARSET_INFO *cs __attribute__((unused)), const uchar *key, uint len,ulong *nr1, ulong *nr2) { @@ -471,7 +494,7 @@ MY_COLLATION_HANDLER my_collation_8bit_bin_handler = my_wildcmp_bin, my_strcasecmp_bin, my_instr_bin, - my_hash_sort_bin, + my_hash_sort_8bit_bin, my_propagate_simple }; diff --git a/strings/ctype-mb.c b/strings/ctype-mb.c index 40cec669766..c12426b555f 100644 --- a/strings/ctype-mb.c +++ b/strings/ctype-mb.c @@ -467,6 +467,13 @@ static void my_hash_sort_mb_bin(CHARSET_INFO *cs __attribute__((unused)), key+= len; + /* + Remove trailing spaces. We have to do this to be able to compare + 'A ' and 'A' as identical + */ + while (key > pos && key[-1] == ' ') + key--; + for (; pos < (uchar*) key ; pos++) { nr1[0]^=(ulong) ((((uint) nr1[0] & 63)+nr2[0]) * diff --git a/strings/ctype-ucs2.c b/strings/ctype-ucs2.c index 6b1ba3c1ef6..f3abbaa6e7e 100644 --- a/strings/ctype-ucs2.c +++ b/strings/ctype-ucs2.c @@ -1484,7 +1484,10 @@ void my_hash_sort_ucs2_bin(CHARSET_INFO *cs __attribute__((unused)), const uchar *pos = key; key+= len; - + + while (key > pos+1 && key[-1] == ' ' && key[-2] == '\0') + key-= 2; + for (; pos < (uchar*) key ; pos++) { nr1[0]^=(ulong) ((((uint) nr1[0] & 63)+nr2[0]) * diff --git a/strings/strtod.c b/strings/strtod.c index 7196cafb2c9..5fe59d10bd2 100644 --- a/strings/strtod.c +++ b/strings/strtod.c @@ -31,13 +31,40 @@ #define MAX_DBL_EXP 308 #define MAX_RESULT_FOR_MAX_EXP 1.7976931348623157 -static double scaler10[] = { - 1.0, 1e10, 1e20, 1e30, 1e40, 1e50, 1e60, 1e70, 1e80, 1e90 -}; -static double scaler1[] = { - 1.0, 10.0, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9 -}; +const double log_10[] = { + 1e000, 1e001, 1e002, 1e003, 1e004, 1e005, 1e006, 1e007, 1e008, 1e009, + 1e010, 1e011, 1e012, 1e013, 1e014, 1e015, 1e016, 1e017, 1e018, 1e019, + 1e020, 1e021, 1e022, 1e023, 1e024, 1e025, 1e026, 1e027, 1e028, 1e029, + 1e030, 1e031, 1e032, 1e033, 1e034, 1e035, 1e036, 1e037, 1e038, 1e039, + 1e040, 1e041, 1e042, 1e043, 1e044, 1e045, 1e046, 1e047, 1e048, 1e049, + 1e050, 1e051, 1e052, 1e053, 1e054, 1e055, 1e056, 1e057, 1e058, 1e059, + 1e060, 1e061, 1e062, 1e063, 1e064, 1e065, 1e066, 1e067, 1e068, 1e069, + 1e070, 1e071, 1e072, 1e073, 1e074, 1e075, 1e076, 1e077, 1e078, 1e079, + 1e080, 1e081, 1e082, 1e083, 1e084, 1e085, 1e086, 1e087, 1e088, 1e089, + 1e090, 1e091, 1e092, 1e093, 1e094, 1e095, 1e096, 1e097, 1e098, 1e099, + 1e100, 1e101, 1e102, 1e103, 1e104, 1e105, 1e106, 1e107, 1e108, 1e109, + 1e110, 1e111, 1e112, 1e113, 1e114, 1e115, 1e116, 1e117, 1e118, 1e119, + 1e120, 1e121, 1e122, 1e123, 1e124, 1e125, 1e126, 1e127, 1e128, 1e129, + 1e130, 1e131, 1e132, 1e133, 1e134, 1e135, 1e136, 1e137, 1e138, 1e139, + 1e140, 1e141, 1e142, 1e143, 1e144, 1e145, 1e146, 1e147, 1e148, 1e149, + 1e150, 1e151, 1e152, 1e153, 1e154, 1e155, 1e156, 1e157, 1e158, 1e159, + 1e160, 1e161, 1e162, 1e163, 1e164, 1e165, 1e166, 1e167, 1e168, 1e169, + 1e170, 1e171, 1e172, 1e173, 1e174, 1e175, 1e176, 1e177, 1e178, 1e179, + 1e180, 1e181, 1e182, 1e183, 1e184, 1e185, 1e186, 1e187, 1e188, 1e189, + 1e190, 1e191, 1e192, 1e193, 1e194, 1e195, 1e196, 1e197, 1e198, 1e199, + 1e200, 1e201, 1e202, 1e203, 1e204, 1e205, 1e206, 1e207, 1e208, 1e209, + 1e210, 1e211, 1e212, 1e213, 1e214, 1e215, 1e216, 1e217, 1e218, 1e219, + 1e220, 1e221, 1e222, 1e223, 1e224, 1e225, 1e226, 1e227, 1e228, 1e229, + 1e230, 1e231, 1e232, 1e233, 1e234, 1e235, 1e236, 1e237, 1e238, 1e239, + 1e240, 1e241, 1e242, 1e243, 1e244, 1e245, 1e246, 1e247, 1e248, 1e249, + 1e250, 1e251, 1e252, 1e253, 1e254, 1e255, 1e256, 1e257, 1e258, 1e259, + 1e260, 1e261, 1e262, 1e263, 1e264, 1e265, 1e266, 1e267, 1e268, 1e269, + 1e270, 1e271, 1e272, 1e273, 1e274, 1e275, 1e276, 1e277, 1e278, 1e279, + 1e280, 1e281, 1e282, 1e283, 1e284, 1e285, 1e286, 1e287, 1e288, 1e289, + 1e290, 1e291, 1e292, 1e293, 1e294, 1e295, 1e296, 1e297, 1e298, 1e299, + 1e300, 1e301, 1e302, 1e303, 1e304, 1e305, 1e306, 1e307, 1e308 +}; /* Convert string to double (string doesn't have to be null terminated) @@ -57,7 +84,7 @@ double my_strtod(const char *str, char **end_ptr, int *error) { double result= 0.0; uint negative= 0, ndigits, dec_digits= 0, neg_exp= 0; - int exponent= 0, digits_after_dec_point= 0, tmp_exp; + int exponent= 0, digits_after_dec_point= 0, tmp_exp, step; const char *old_str, *end= *end_ptr, *start_of_number; char next_char; my_bool overflow=0; @@ -179,16 +206,10 @@ double my_strtod(const char *str, char **end_ptr, int *error) exponent= -exponent; neg_exp= 1; /* neg_exp was 0 before */ } - while (exponent >= 100) - { - result= neg_exp ? result/1.0e100 : result*1.0e100; - exponent-= 100; - } - scaler= scaler10[exponent/10]*scaler1[exponent%10]; - if (neg_exp) - result/= scaler; - else - result*= scaler; + step= array_elements(log_10) - 1; + for (; exponent > step; exponent-= step) + result= neg_exp ? result / log_10[step] : result * log_10[step]; + result= neg_exp ? result / log_10[exponent] : result * log_10[exponent]; } done: |