diff options
Diffstat (limited to 'include/freetype/internal/ftcalc.h')
| -rw-r--r-- | include/freetype/internal/ftcalc.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/include/freetype/internal/ftcalc.h b/include/freetype/internal/ftcalc.h index df6c3766d..1cd32c892 100644 --- a/include/freetype/internal/ftcalc.h +++ b/include/freetype/internal/ftcalc.h @@ -408,6 +408,29 @@ FT_BEGIN_HEADER #define ROUND_F26DOT6( x ) ( x >= 0 ? ( ( (x) + 32 ) & -64 ) \ : ( -( ( 32 - (x) ) & -64 ) ) ) + /* + * The following macros have two purposes. + * + * . Tag places where overflow is expected and harmless. + * + * . Avoid run-time sanitizer errors. + * + * Use with care! + */ +#define OVERFLOW_ADD_INT( a, b ) \ + (FT_Int)( (FT_UInt)(a) + (FT_UInt)(b) ) +#define OVERFLOW_SUB_INT( a, b ) \ + (FT_Int)( (FT_UInt)(a) - (FT_UInt)(b) ) +#define OVERFLOW_MUL_INT( a, b ) \ + (FT_Int)( (FT_UInt)(a) * (FT_UInt)(b) ) + +#define OVERFLOW_ADD_LONG( a, b ) \ + (FT_Long)( (FT_ULong)(a) + (FT_ULong)(b) ) +#define OVERFLOW_SUB_LONG( a, b ) \ + (FT_Long)( (FT_ULong)(a) - (FT_ULong)(b) ) +#define OVERFLOW_MUL_LONG( a, b ) \ + (FT_Long)( (FT_ULong)(a) * (FT_ULong)(b) ) + FT_END_HEADER |