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STRPCT(3)                  Library Functions Manual                  STRPCT(3)

     strpct, strspct -- decimal percent formatters

     System Utilities Library (libutil, -lutil)

     #include <util.h>

     char *
     strpct(char *buf, size_t bufsiz, uintmax_t numerator,
         uintmax_t denominator, size_t precision);

     char *
     strspct(char *buf, size_t bufsiz, intmax_t numerator,
         intmax_t denominator, size_t precision);

     The strpct() function formats the fraction represented by numerator and
     denominator into a percentage representation with given number of digits
     of precision without using floating point arithmetic.

     strpct() and strspct() always return a pointer to a NUL-terminated
     (unless buflen is 0) formatted string which is placed in buf and is up to
     buflen characters.  If there was an overflow, the formatted string will
     reflect that precision loss.

           strpct(buf, buflen, 1, 16, 3);
           => "6.250"
           strpct(buf, buflen, 1, 2, 0);
           => "50"

     strpct() was originally implemented in csh(1) for NetBSD 1.3.  It printed
     into a static buffer, was not locale aware, handled unsigned long
     numbers, and printed a ``%'' at the end of the number.  Other programs
     such as df(1) and time(1) started using it.  strpct() and strspct()
     appeared separately in libutil for NetBSD 6.0.

     Erik E. Fair <fair@netbsd.org>

NetBSD 7.1.2                    January 7, 2012                   NetBSD 7.1.2