.TH fmt_xlonglong 3
.SH NAME
fmt_xlonglong \- write a hexadecimal ASCII representation of an unsigned long long integer
.SH SYNTAX
.B #include <libowfat/fmt.h>

size_t \fBfmt_xlonglong\fP(char *\fIdest\fR,unsigned long long \fIsource\fR);
.SH DESCRIPTION
fmt_xlonglong writes an ASCII representation ('0' to '9' and 'a' to 'f',
base 16) of \fIsource\fR to \fIdest\fR and returns the number of bytes
written.

fmt_xlonglong does not append \\0.

If \fIdest\fR equals FMT_LEN (i.e. is zero), fmt_xlonglong returns the
number of bytes it would have written.

For convenience, fmt.h defines the integer FMT_XLONG to be big enough to
contain every possible fmt_xlonglong output plus \\0.
.SH "SEE ALSO"
scan_xlonglong(3)