.TH qlibs: fmt 3
.SH NAME
fmt \- ASCII representation of strings and integers
.SH SYNTAX
.B #include \(dqfmt.h\(dq

unsigned int \fBfmt_str\fP(char *\fIdest\fR,const char *\fIsource\fR);
.br
unsigned int \fBfmt_strn\fP(char *\fIdest\fR,const char *\fIsource\fR,unsigned int \fImaxlen\fR);

unsigned int \fBfmt_uint\fP(char *\fIdest\fR,unsigned int \fIsource\fR);
.br
unsigned int \fBfmt_uint0\fP(char *\fIdest\fR,unsigned int \fIsource\fR,unsigned int \fIn\fR);
.br
unsigned int \fBfmt_ulong\fP(char *\fIdest\fR,unsigned long \fIsource\fR);
.br
unsigned int \fBfmt_xlong\fP(char *\fIdest\fR,unsigned long \fIsource\fR);
.br 
char \fBtohex\fP(char \fInum\fR);
.br
int \fBfromhex\fP(unsigned char \fIc\fR);
.SH DESCRIPTION
.B fmt_str 
copies all leading nonzero bytes from \fIsource\fR to \fIdest\fR
and returns the number of bytes it copied.
.B fmt_str 
does not append \\0.

.B fmt_strn
copies at most \fImaxlen\fR leading nonzero bytes from
\fIsource\fR to \fIdest\fR and returns the number of bytes it copied.
.B fmt_strn 
does not append \\0.

.B fmt_uint 
writes an ASCII representation ('0' to '9', base 10) of
\fIsource\fR to \fIdest\fR and returns the number of bytes written.
.B fmt_uint 
does not append \\0.

.B fmt_uint0 
writes an ASCII representation ('0' to '9', base 10) of
\fIsource\fR to \fIdest\fR and returns the number of bytes written.
The output is padded with '0'-bytes until it encompasses at least
\fIn\fR bytes, but it will not be truncated if it does not fit.
.B fmt_uint0 
does not append \\0.

.B fmt_ulong 
writes an ASCII representation ('0' to '9', base 10) of
\fIsource\fR to \fIdest\fR and returns the number of bytes written
perhaps including a trailing \\0.
.B fmt_ulong 
does not append \\0.

.B fmt_xlong 
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.
.B fmt_xlong 
does not append \\0.

.B tohex
reads the ASCII representation of a decimal \fInum\fR and returns its 
hexadecimal ASCII value; thus \'0\' -> \'0\' ... \'9\' -> \'9\',  
\'10\' -> \'a\' and finally \'15\' -> f'.

.B fromhex
reads the ACSII representation of a hexadecimal number \'0\' to \'f\' 
irrelevant of its case and returns its integer value. 

For convenience, 
.B fmt.h 
defines the integers
.I FMT_LEN
and
.I FMT_ULONG
to be big enough to the number of bytes it would have written.


.SH "RETURN CODES"
If \fIdest\fR equals FMT_LEN (i.e. is zero), all
.B fmt_* 
routins return the number of bytes it would have written
i.e. the number of leading nonzero bytes of \fIsource\fR 
perhaps including a \\0.
.SH "SEE ALSO"
byte(3), 
case(3), 
scan(3)