SYNTAX

       #include "fmt.h"

       unsigned int fmt_str(char *dest,const char *source);
       unsigned int fmt_strn(char *dest,const char *source,unsigned int
       maxlen);

       unsigned int fmt_uint(char *dest,unsigned int source);
       unsigned int fmt_uint0(char *dest,unsigned int source,unsigned int n);
       unsigned int fmt_ulong(char *dest,unsigned long source);
       unsigned int fmt_xlong(char *dest,unsigned long source);
       char tohex(char num);
       int fromhex(unsigned char c);

DESCRIPTION

       fmt_str copies all leading nonzero bytes from source to dest and
       returns the number of bytes it copied.  fmt_str does not append \0.

       fmt_strn copies at most maxlen leading nonzero bytes from source to
       dest and returns the number of bytes it copied.  fmt_strn does not
       append \0.

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

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

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

       fmt_xlong writes an ASCII representation ('0' to '9' and 'a' to 'f',
       base 16) of source to dest and returns the number of bytes written.
       fmt_xlong does not append \0.

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

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

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