Commit 540b8492 authored by Leonid Bloch's avatar Leonid Bloch Committed by Kevin Wolf
Browse files

include: Add a lookup table of sizes 



Adding a lookup table for the powers of two, with the appropriate size
prefixes. This is needed when a size has to be stringified, in which
case something like '(1 * KiB)' would become a literal '(1 * (1L << 10))'
string. Powers of two are used very often for sizes, so such a table
will also make it easier and more intuitive to write them.

This table is generatred using the following AWK script:

BEGIN {
	suffix="KMGTPE";
	for(i=10; i<64; i++) {
		val=2**i;
		s=substr(suffix, int(i/10), 1);
		n=2**(i%10);
		pad=21-int(log(n)/log(10));
		printf("#define S_%d%siB %*d\n", n, s, pad, val);
	}
}

Signed-off-by: default avatarLeonid Bloch <lbloch@janustech.com>
Reviewed-by: default avatarAlberto Garcia <berto@igalia.com>
Reviewed-by: default avatarKevin Wolf <kwolf@redhat.com>
Signed-off-by: default avatarKevin Wolf <kwolf@redhat.com>
parent 40fb215d

include/qemu/units.h

+55 −0
Original line number Diff line number Diff line
@@ -17,4 +17,59 @@ 
#define PiB     (INT64_C(1) << 50)

#define EiB     (INT64_C(1) << 60)



#define S_1KiB                  1024

#define S_2KiB                  2048

#define S_4KiB                  4096

#define S_8KiB                  8192

#define S_16KiB                16384

#define S_32KiB                32768

#define S_64KiB                65536

#define S_128KiB              131072

#define S_256KiB              262144

#define S_512KiB              524288

#define S_1MiB               1048576

#define S_2MiB               2097152

#define S_4MiB               4194304

#define S_8MiB               8388608

#define S_16MiB             16777216

#define S_32MiB             33554432

#define S_64MiB             67108864

#define S_128MiB           134217728

#define S_256MiB           268435456

#define S_512MiB           536870912

#define S_1GiB            1073741824

#define S_2GiB            2147483648

#define S_4GiB            4294967296

#define S_8GiB            8589934592

#define S_16GiB          17179869184

#define S_32GiB          34359738368

#define S_64GiB          68719476736

#define S_128GiB        137438953472

#define S_256GiB        274877906944

#define S_512GiB        549755813888

#define S_1TiB         1099511627776

#define S_2TiB         2199023255552

#define S_4TiB         4398046511104

#define S_8TiB         8796093022208

#define S_16TiB       17592186044416

#define S_32TiB       35184372088832

#define S_64TiB       70368744177664

#define S_128TiB     140737488355328

#define S_256TiB     281474976710656

#define S_512TiB     562949953421312

#define S_1PiB      1125899906842624

#define S_2PiB      2251799813685248

#define S_4PiB      4503599627370496

#define S_8PiB      9007199254740992

#define S_16PiB    18014398509481984

#define S_32PiB    36028797018963968

#define S_64PiB    72057594037927936

#define S_128PiB  144115188075855872

#define S_256PiB  288230376151711744

#define S_512PiB  576460752303423488

#define S_1EiB   1152921504606846976

#define S_2EiB   2305843009213693952

#define S_4EiB   4611686018427387904

#define S_8EiB   9223372036854775808



#endif