Cryptlib/SysCall/math.c - main - githubmirror/shim

Cryptlib/SysCall/math.c
68 строк2 KB
Nicolas Frayer
Cryptlib/OpenSSL: update to openssl 3.5.0
08 июл 2026, 17:36
08 июл 2026, 17:363b52c67
#include <CrtLibSupport.h>

/**
  Divides a 64-bit signed integer by a 64-bit signed integer and
  generates a 64-bit signed result and an optional 64-bit signed remainder.

  This function divides the 64-bit signed value Dividend by the 64-bit
  signed value Divisor and generates a 64-bit signed quotient. If Remainder
  is not NULL, then the 64-bit signed remainder is returned in Remainder.
  This function returns the 64-bit signed quotient.

  @param  Dividend  A 64-bit signed value.
  @param  Divisor   A 64-bit signed value.
  @param  Remainder A pointer to a 64-bit signed value. This parameter is
                    optional and may be NULL.

  @return Dividend / Divisor.

**/
INT64
EFIAPI
InternalMathDivRemS64x64 (
  IN      INT64  Dividend,
  IN      INT64  Divisor,
  OUT     INT64  *Remainder  OPTIONAL
  )
{
  if (Remainder != NULL) {
    *Remainder = Dividend % Divisor;
  }

  return Dividend / Divisor;
}

/**
  Divides a 64-bit signed integer by a 64-bit signed integer and generates a
  64-bit signed result and a optional 64-bit signed remainder.

  This function divides the 64-bit signed value Dividend by the 64-bit signed
  value Divisor and generates a 64-bit signed quotient. If Remainder is not
  NULL, then the 64-bit signed remainder is returned in Remainder. This
  function returns the 64-bit signed quotient.

  It is the caller's responsibility to not call this function with a Divisor of 0.
  If Divisor is 0, then the quotient and remainder should be assumed to be
  the largest negative integer.

  If Divisor is 0, then ASSERT().

  @param  Dividend  A 64-bit signed value.
  @param  Divisor   A 64-bit signed value.
  @param  Remainder A pointer to a 64-bit signed value. This parameter is
                    optional and may be NULL.

  @return Dividend / Divisor

**/
INT64
EFIAPI
DivS64x64Remainder (
  IN      INT64  Dividend,
  IN      INT64  Divisor,
  OUT     INT64  *Remainder  OPTIONAL
  )
{
  ASSERT (Divisor != 0);
  return InternalMathDivRemS64x64 (Dividend, Divisor, Remainder);
}