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| author | Alexey Kopytov <alexeyk@mysql.com> | 2008-12-03 19:15:39 +0300 |
|---|---|---|
| committer | Alexey Kopytov <alexeyk@mysql.com> | 2008-12-03 19:15:39 +0300 |
| commit | 91f0c94c23eb9b48421d9590662666de9e4c75d5 (patch) | |
| tree | 897de4fad83899e4bae91b9435028a0240815aa6 /include/config-win.h | |
| parent | 7f9e0b9bfb71bd3e47c48bb77f11df76feb1b7ad (diff) | |
| download | mariadb-git-91f0c94c23eb9b48421d9590662666de9e4c75d5.tar.gz | |
Fix for bug #27483: Casting 'scientific notation type' to 'unsigned
bigint' fails on windows.
Visual Studio does not take into account some x86 hardware limitations
which leads to incorrect results when converting large DOUBLE values
to BIGINT UNSIGNED ones.
Fixed by adding a workaround for double->ulonglong conversion on
Windows.
include/config-win.h:
Added double2ulonglong(double) function implementing a workaround for
broken double->ulonglong conversion on Windows/x86.
include/my_global.h:
Define double2ulonglong() as a simple typecast for anything but
Windows.
mysql-test/r/type_float.result:
Added a test case for bug #27483.
mysql-test/t/type_float.test:
Added a test case for bug #27483.
Diffstat (limited to 'include/config-win.h')
| -rw-r--r-- | include/config-win.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/config-win.h b/include/config-win.h index 2628095a181..eba699159c7 100644 --- a/include/config-win.h +++ b/include/config-win.h @@ -245,6 +245,15 @@ inline double ulonglong2double(ulonglong value) #define my_off_t2double(A) ulonglong2double(A) #endif /* _WIN64 */ +inline ulonglong double2ulonglong(double d) +{ + double t= d - (double) 0x8000000000000000ULL; + + if (t >= 0) + return ((ulonglong) t) + 0x8000000000000000ULL; + return (ulonglong) d; +} + #if SIZEOF_OFF_T > 4 #define lseek(A,B,C) _lseeki64((A),(longlong) (B),(C)) #define tell(A) _telli64(A) |