diff options
| -rw-r--r-- | mysql-test/r/type_float.result | 2 | ||||
| -rw-r--r-- | strings/strtod.c | 20 |
2 files changed, 5 insertions, 17 deletions
diff --git a/mysql-test/r/type_float.result b/mysql-test/r/type_float.result index 95050163787..f157bbc602d 100644 --- a/mysql-test/r/type_float.result +++ b/mysql-test/r/type_float.result @@ -274,7 +274,7 @@ a double 0 drop table t1,t2,t3; select 1e-308, 1.00000001e-300, 100000000e-300; 1e-308 1.00000001e-300 100000000e-300 -0 1.00000001e-300 1e-292 +1e-308 1.00000001e-300 1e-292 select 10e307; 10e307 1e+308 diff --git a/strings/strtod.c b/strings/strtod.c index f298e265d7f..79ba458c009 100644 --- a/strings/strtod.c +++ b/strings/strtod.c @@ -31,7 +31,6 @@ #define MAX_DBL_EXP 308 #define MAX_RESULT_FOR_MAX_EXP 1.7976931348623157 -#define MIN_RESULT_FOR_MIN_EXP 2.225073858507202 static double scaler10[] = { 1.0, 1e10, 1e20, 1e30, 1e40, 1e50, 1e60, 1e70, 1e80, 1e90 }; @@ -161,26 +160,15 @@ double my_strtod(const char *str, char **end_ptr, int *error) order= exp + (neg_exp ? -1 : 1) * (ndigits - 1); if (order < 0) order= -order; - if (order >= MAX_DBL_EXP && result) + if (order >= MAX_DBL_EXP && !neg_exp && result) { double c; /* Compute modulus of C (see comment above) */ c= result / scaler * 10.0; - if (neg_exp) + if (order > MAX_DBL_EXP || c > MAX_RESULT_FOR_MAX_EXP) { - if (order > MAX_DBL_EXP || c < MIN_RESULT_FOR_MIN_EXP) - { - result= 0.0; - goto done; - } - } - else - { - if (order > MAX_DBL_EXP || c > MAX_RESULT_FOR_MAX_EXP) - { - overflow= 1; - goto done; - } + overflow= 1; + goto done; } } |