portal.5 (2010 09)

portal(5) portal(5)

The SET_MASK_BIT_LOOP

macro in the following example will turn on the three least signiﬁcant bits of

the maximum integer.

int i;

intmax_t mask = 0;

for(i=0;i<3;i++) {

SET_MASK_BIT_LOOP(mask, i, intmax_t);

}

The SIGN_BIT macro in the following example will return the position of the sign bit in a 32-bit integer.

SIGN_BIT(int32_t)

The SIGN_BIT_MASK

macro in the following example will return a sign bit mask for a 32-bit integer.

SIGN_BIT_MASK(int32_t)

The SIGN_EXTEND macro in the following example will convert the 8-bit integer stored in a char data

type to a 64-bit integer and correctly extend the sign.

char c;

int64_t i;

i = SIGN_EXTEND(c, char, int64_t);

The TEST_ENDIAN macro in the following example will store a 1 in endian if the compilation was big

endian; otherwise, it will store a 0 in endian .

int endian;

TEST_ENDIAN(endian);

if (endian == 0)

printf("This a little endian system\n");

if (endian == 1)

printf("This a big endian system\n");

AUTHOR

portal.h was developed by HP.

FILES

/usr/include/sys/portal.h