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# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Library General Public License for more details.
#
# You should have received a copy of the GNU Library General
# Public License along with this library; if not, write to the
# Free Foundation, Inc., 59 Temple Place, Suite 330, Boston,
# MA 02111-1307 USA
# Copyrights (C)
# for this R-port:
# 1999 - Diethelm Wuertz, GPL
# 2007 - Rmetrics Foundation, GPL
# Diethelm Wuertz <wuertz@phys.ethz.ch>
# www.rmetrics.org
# for the code accessed (or partly included) from other R-ports:
# see R's copyright and license files
# for the code accessed (or partly included) from contributed R-ports
# and other sources
# see Rmetrics's copyright file
################################################################################
# FUNCTION: DESCRIPTION:
# rulesFinCenter Returns DST rules for a financial center
################################################################################
rulesFinCenter <-
function(FinCenter = myFinCenter)
{
# A function implemented by Diethelm Wuertz
# Description:
# Show the day light saving rules for a financial center
# Arguments:
# FinCenter - a character string with the the location of the
# financial center named as "continent/city".
# FUNCTION:
# Check:
if (FinCenter == "GMT" | FinCenter == "")
stop("There are no DST rules for GMT FinCenter!")
# Set Timezone to GMT:
myTZ = Sys.getenv("TZ")
Sys.setenv(TZ = "GMT")
if (FinCenter == "") FinCenter = "GMT"
TZ <- Sys.getenv("TZ")
if(TZ[[1]] != "GMT") {
Sys.setenv(TZ = "GMT")
on.exit(Sys.setenv(TZ = TZ))
}
# Internal Function for Conversion from Ical Tables:
# if (FALSE) {
# rulesFinCenter2 =
# function(FinCenter = myFinCenter) {
# # A function implemented by Diethelm Wuertz
# # Description:
# # Show the day light saving rules for a financial center
# # Arguments:
# # FinCenter - a character string with the the location of the
# # financial center named as "continent/city".
# # Value:
# # Returns a printed list of DST rules.
# # Example:
# # > rulesFinCenter("Zurich")
# # ruleChanges offSet
# # 1 1894-05-31 23:30:16 3600
# # 2 1940-11-01 23:00:00 7200
# # 3 1940-12-30 22:00:00 3600
# # 5 1941-10-04 22:00:00 3600
# # 6 1942-05-03 01:00:00 7200
# # 7 1942-10-03 22:00:00 3600
# # 8 1980-12-31 23:00:00 3600
# # 9 1981-03-29 01:00:00 7200
# # ...
# # Note:
# # Important, the "TZ" environment variable must set
# # to "GMT" in your Windows Environment!
#
# # Set Timezone to GMT:
# myTZ = Sys.getenv("TZ")
# Sys.setenv(TZ = "GMT")
# if (FinCenter == "") FinCenter = "GMT"
#
# # Read the Rules:
# # Get IcalPath from .FirstLib
# file = paste(IcalPath, FinCenter, sep = "")
# zfile <- zip.file.extract(file, "Rdata.zip")
# ical = read.table(zfile, skip = 2)
#
# # GMT Offsets:
# hm = as.integer(ical[,6])
# sg = sign(hm)
# hm = abs(hm)
# h = floor(hm/100)
# hms.off = sg * ( floor(hm/100)*3600 + (hm - 100*h)*60 + 0 )
# hms.off
#
# # When have the rules changed?
# months.num = 1:12
# names(months.num) = c(
# "Jan", "Feb", "Mar", "Apr", "May", "Jun",
# "Jul", "Aug", "Sep", "Oct", "Nov", "Dec")
# Y = as.integer(ical[,4])
# m = as.integer(months.num[as.character(ical[,3])])
# d = as.integer(ical[,2])
# CCYYMMDD = as.character(Y*10000+100*m+d)
# hms = unlist(strsplit(as.character(ical[,5]), ":"))
# hms = matrix(as.integer(hms), byrow=TRUE, ncol=3)
# hms = 1000000 + 10000*hms[,1] + 100*hms[,2] + hms[,3]
# hhmmss = substr(as.character(hms), 2, 7)
# ruleChangesGMT = strptime(paste(CCYYMMDD, hhmmss), "%Y%m%d %H%M%S")
# attr(ruleChangesGMT, "tzone") <- "GMT"
#
# # Return Value:
# Sys.setenv(TZ = myTZ)
# data.frame(ruleChanges = as.character(ruleChangesGMT),
# offSet = hms.off) }
# }
# ## Instead:
# Match City:
fccity <- strsplit(FinCenter, "/")[[1]]
City <- fccity[length(fccity)]
fun <- match.fun(City)
# Return Value:
fun()
}
################################################################################
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