diff options
Diffstat (limited to 'include/my_global.h')
| -rw-r--r-- | include/my_global.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/my_global.h b/include/my_global.h index 23fe71caa8d..21fe1ebc3cb 100644 --- a/include/my_global.h +++ b/include/my_global.h @@ -846,6 +846,21 @@ typedef long long my_ptrdiff_t; #define ADD_TO_PTR(ptr,size,type) (type) ((byte*) (ptr)+size) #define PTR_BYTE_DIFF(A,B) (my_ptrdiff_t) ((byte*) (A) - (byte*) (B)) +/* + Custom version of standard offsetof() macro which can be used to get + offsets of members in class for non-POD types (according to the current + version of C++ standard offsetof() macro can't be used in such cases and + attempt to do so causes warnings to be emitted, OTOH in many cases it is + still OK to assume that all instances of the class has the same offsets + for the same members). + + This is temporary solution which should be removed once File_parser class + and related routines are refactored. +*/ + +#define my_offsetof(TYPE, MEMBER) \ + ((size_t)((char *)&(((TYPE *)0x10)->MEMBER) - (char*)0x10)) + #define NullS (char *) 0 /* Nowdays we do not support MessyDos */ #ifndef NEAR |