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authorLibravatar Michael J Gruber <git@drmicha.warpmail.net>2011-04-20 11:12:11 +0200
committerLibravatar Junio C Hamano <gitster@pobox.com>2011-04-20 19:23:16 -0700
commitf1e9c548ce45005521892af0299696204ece286b (patch)
tree6387f371b2dcb5c837325b661aa04322d5c5863f /Documentation/CodingGuidelines
parentGit 1.7.3 (diff)
downloadtgif-f1e9c548ce45005521892af0299696204ece286b.tar.xz
date: avoid "X years, 12 months" in relative dates
When relative dates are more than about a year ago, we start writing them as "Y years, M months". At the point where we calculate Y and M, we have the time delta specified as a number of days. We calculate these integers as: Y = days / 365 M = (days % 365 + 15) / 30 This rounds days in the latter half of a month up to the nearest month, so that day 16 is "1 month" (or day 381 is "1 year, 1 month"). We don't round the year at all, though, meaning we can end up with "1 year, 12 months", which is silly; it should just be "2 years". Implement this differently with months of size onemonth = 365/12 so that totalmonths = (long)( (days + onemonth/2)/onemonth ) years = totalmonths / 12 months = totalmonths % 12 In order to do this without floats, we write the first formula as totalmonths = (days*12*2 + 365) / (365*2) Tests and inspiration by Jeff King. Helped-by: Jeff King <peff@peff.net> Signed-off-by: Michael J Gruber <git@drmicha.warpmail.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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