intmath.h File Reference

#include <cstdint>

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Functions
bool	AddInt63OverflowEmulated (int64_t a, int64_t b, int64_t &result)
	Computes a + b and stores it in result.
bool	AddInt63Overflow (int64_t a, int64_t b, int64_t &result)
	Computes a + b and stores it in result.
bool	SubInt63OverflowEmulated (int64_t a, int64_t b, int64_t &result)
	Computes a - b and stores it in result.
bool	SubInt63Overflow (int64_t a, int64_t b, int64_t &result)
	Computes a - b and stores it in result.

Function Documentation

AddInt63Overflow()

bool AddInt63Overflow	(	int64_t	a,
		int64_t	b,
		int64_t &	result
	)

Computes a + b and stores it in result.

If the sum overflows or results in an invalid 63+sign-bit integer, return true, otherwise false. Uses built-in overflow functions if available, and emulated overflow math otherwise.

Definition at line 27 of file intmath.cpp.

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AddInt63OverflowEmulated()

bool AddInt63OverflowEmulated	(	int64_t	a,
		int64_t	b,
		int64_t &	result
	)

Computes a + b and stores it in result.

If the sum overflows or results in an invalid 63+sign-bit integer, return true, otherwise false. Overflow checks are emulated and don't rely on built-in overflow checks.

Definition at line 14 of file intmath.cpp.

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SubInt63Overflow()

bool SubInt63Overflow	(	int64_t	a,
		int64_t	b,
		int64_t &	result
	)

Computes a - b and stores it in result.

If the sum difference or results in an invalid 63+sign-bit integer, return true, otherwise false. Uses built-in overflow functions if available, and emulated overflow math otherwise.

Definition at line 51 of file intmath.cpp.

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SubInt63OverflowEmulated()

bool SubInt63OverflowEmulated	(	int64_t	a,
		int64_t	b,
		int64_t &	result
	)

Computes a - b and stores it in result.

If the difference overflows or results in an invalid 63+sign-bit integer, return true, otherwise false. Overflow checks are emulated and don't rely on built-in overflow checks.

Definition at line 38 of file intmath.cpp.

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