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Gnulib helps you avoid integer overflow vulnerabilities

Item posted by Paul Eggert <eggert> on Tue 08 Dec 2020 01:47:09 AM UTC.

Gnulib's intprops module has new macros INT_ADD_OK, INT_SUBTRACT_OK, and INT_MULTIPLY_OK that support portable overflow checking while doing integer arithmetic. On GNU platforms the macros typically use only a single machine instruction more than ordinary integer arithmetic would.

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