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calc/lib/qtime.cal
2017-05-21 15:38:36 -07:00

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/*
* qtime - Display time as English sentence
*
* usage:
* qtime(utc_hr_offset)
*
* utc_hr_offset Offset from UTC in hours.
*
* Written by: Klaus Alexander Seistrup <kseis@magnetic-ink.dk>
* With minor mods by: Landon Curt Noll <http://reality.sgi.com/chongo/>
*
* See:
* http://www.magnetic-ink.dk/download/qtime.html
*
* for examples of qtime() written on other languages.
*/
/*
* qtime - Display time as English sentence
*/
define qtime(utc_hr_offset)
{
static mat hr[12] = {
"twelve", "one", "two", "three", "four", "five",
"six", "seven", "eight", "nine", "ten", "eleven"
};
static mat mn[7] = {
"", "five ", "ten ", "a quarter ", "twenty ", "twenty-five ", "half "
};
static mat ny[5] = {
"nearly ", "almost ", "", "just after ", "after "
};
static mat up[3] = {
"to ", "", "past "
};
local adj_mins = (((time() + utc_hr_offset*3600) % 86400) + 30) // 60 + 27;
local hours = (adj_mins // 60) % 12;
local minutes = adj_mins % 60;
local almost = minutes % 5;
local divisions = (minutes // 5) - 5;
local to_past_idx = divisions > 0 ? 1 : 0;
if (divisions < 0) {
divisions = -divisions;
to_past_idx = -1;
}
++to_past_idx;
/*
* Print the English sentence
*
* We avoid forward and back quotes just to show that the char()
* builtin function can be used in conjunction with a printf.
*/
printf("It%cs %s%s%s%s",
char(0x27), ny[almost], mn[divisions], up[to_past_idx], hr[hours]);
if (divisions == 0)
printf(" o%cclock", char(0x27));
printf (".\n");
}