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-PARSE_TIME(3)            BSD Library Functions Manual            PARSE_TIME(3)
-
-NAME
-     parse_time, print_time_table, unparse_time, unparse_time_approx, -- parse
-     and unparse time intervals
-
-LIBRARY
-     The roken library (libroken, -lroken)
-
-SYNOPSIS
-     #include <parse_time.h>
-
-     int
-     parse_time(const char *timespec, const char *def_unit);
-
-     void
-     print_time_table(FILE *f);
-
-     size_t
-     unparse_time(int seconds, char *buf, size_t len);
-
-     size_t
-     unparse_time_approx(int seconds, char *buf, size_t len);
-
-DESCRIPTION
-     The parse_time() function converts the period of time specified into a
-     number of seconds.  The timespec can be any number of <number unit> pairs
-     separated by comma and whitespace. The number can be negative. Numbers
-     without explicit units are taken as being def_unit.
-
-     The unparse_time() and unparse_time_approx() do the opposite of
-     parse_time(), that is they take a number of seconds and express that as
-     human readable strings.  unparse_time produces an exact time, while
-     unparse_time_approx restricts the result to include only one unit.
-
-     print_time_table() prints a descriptive list of available units on the
-     passed file descriptor.
-
-     The possible units include:
-           second, s
-           minute, m
-           hour, h
-           day
-           week   seven days
-           month  30 days
-           year   365 days
-
-     Units names can be arbitrarily abbreviated (as long as they are unique).
-
-RETURN VALUES
-     parse_time() returns the number of seconds that represents the expression
-     in timespec or -1 on error.  unparse_time() and unparse_time_approx() re-
-     turn the number of characters written to buf.  if the return value is
-     greater than or equal to the len argument, the string was too short and
-     some of the printed characters were discarded.
-
-EXAMPLES
-     #include <stdio.h>
-     #include <parse_time.h>
-
-     int
-     main(int argc, char **argv)
-     {
-         int i;
-         int result;
-         char buf[128];
-         print_time_table(stdout);
-         for (i = 1; i < argc; i++) {
-             result = parse_time(argv[i], "second");
-             if(result == -1) {
-                 fprintf(stderr, "%s: parse error\n", argv[i]);
-                 continue;
-             }
-             printf("--\n");
-             printf("parse_time = %d\n", result);
-             unparse_time(result, buf, sizeof(buf));
-             printf("unparse_time = %s\n", buf);
-             unparse_time_approx(result, buf, sizeof(buf));
-             printf("unparse_time_approx = %s\n", buf);
-         }
-         return 0;
-     }
-
-     $ ./a.out "1 minute 30 seconds" "90 s" "1 y -1 s"
-     1   year = 365 days
-     1  month = 30 days
-     1   week = 7 days
-     1    day = 24 hours
-     1   hour = 60 minutes
-     1 minute = 60 seconds
-     1 second
-     --
-     parse_time = 90
-     unparse_time = 1 minute 30 seconds
-     unparse_time_approx = 1 minute
-     --
-     parse_time = 90
-     unparse_time = 1 minute 30 seconds
-     unparse_time_approx = 1 minute
-     --
-     parse_time = 31535999
-     unparse_time = 12 months 4 days 23 hours 59 minutes 59 seconds
-     unparse_time_approx = 12 months
-
-BUGS
-     Since parse_time() returns -1 on error there is no way to parse "minus
-     one second".  Currently "s" at the end of units is ignored. This is a
-     hack for English plural forms. If these functions are ever localised,
-     this scheme will have to change.
-
-HEIMDAL                        November 17, 2013                       HEIMDAL