Werner Lemberg 77f0814a31 Add macros for handling over-/underflowing `FT_Int64' values.
* include/freetype/internal/ftcalc.h (ADD_INT64, SUB_INT64,
MUL_INT64, DIV_INT64) [FT_LONG64]: New macros.

* src/base/ftcalc.c (ft_corner_orientation) [FT_LONG64]: Use
`SUB_INT64' and `MUL_INT64'.

Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=10028
2018-08-23 17:53:54 +02:00
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