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Manual Pages  — EXPAND_NUMBER

NAME

expand_number – format a number from human readable form

CONTENTS

LIBRARY

System Utilities Library (libutil, -lutil)

SYNOPSIS

#include <libutil.h>

int
expand_number(const char *buf, uint64_t *num);

DESCRIPTION

The expand_number() function unformats the buf string and stores a unsigned 64-bit quantity at address pointed out by the num argument.

The expand_number() function is case-insensitive and follows the SI power of two convention.

The prefixes are:
Prefix Description Multiplier
K kilo 1024
M mega 1048576
G giga 1073741824
T tera 1099511627776
P peta 1125899906842624
E exa 1152921504606846976

RETURN VALUES

Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the error.

ERRORS

The expand_number() function will fail if:
[EINVAL]
  The given string contains no digits.
[EINVAL]
  An unrecognized prefix was given.
[ERANGE]
  Result doesn't fit into 64 bits.

SEE ALSO

humanize_number(3)

HISTORY

The expand_number() function first appeared in FreeBSD 6.3 .

EXPAND_NUMBER (3) August 15, 2010

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