expand_number(3bsd) 3bsd expand_number(3bsd)

expand_number — format a number from human readable form

library “libbsd”

#include <libutil.h> (See libbsd(7) for include usage.)
int
expand_number(const char *buf, uint64_t *num);

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

The () function follows the SI power of two convention.

The prefixes are:

1024
1048576
1073741824
1099511627776
1125899906842624
1152921504606846976

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.

The expand_number() function will fail if:

[]
The given string contains no digits.
[]
An unrecognized prefix was given.
[]
Result doesn't fit into 64 bits.

humanize_number(3bsd)

The expand_number() function first appeared in FreeBSD 6.3.

August 15, 2010 Linux 6.7.9-arch1-1