intmath.h File Reference

#include <cstdlib>
#include <limits>

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

Function Documentation

AddInt63Overflow()

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

static

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 34 of file intmath.h.

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AddInt63OverflowEmulated()

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

static

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 15 of file intmath.h.

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SubInt63Overflow()

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

static

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 69 of file intmath.h.

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SubInt63OverflowEmulated()

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

static

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 50 of file intmath.h.

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