Nothing
readMagpieMZ <- function(fileName, compressed) {
if (compressed) {
zz <- gzfile(fileName, "rb")
} else {
zz <- file(fileName, "rb")
}
on.exit(close(zz))
newestFformatVersion <- 6
fformatVersion <- readBin(zz, integer(), 1, size = 2)
if (fformatVersion > newestFformatVersion) {
stop("File format is newer (v", fformatVersion, ") than the formats supported (v1-v",
newestFformatVersion, "). ", "\nPlease update your magclass package to the newest version!")
}
ncharComment <- readBin(zz, integer(), 1, size = 4)
empty <- 94
if (fformatVersion > 2) {
nbyteMetadata <- readBin(zz, integer(), 1, size = 4)
}
if (fformatVersion > 1) {
ncharSets <- readBin(zz, integer(), 1, size = 2)
empty <- empty - 2
}
if (fformatVersion < 6) readBin(zz, integer(), empty, size = 1)
nyears <- readBin(zz, integer(), 1, size = 2)
yearList <- readBin(zz, integer(), nyears, size = 2)
useBytes <- (fformatVersion > 4)
if (fformatVersion > 5) {
ncells <- readBin(zz, integer(), 1, size = 4)
ncharCells <- readBin(zz, integer(), 1, size = 4)
cellnames <- strsplit(readChar(zz, ncharCells, useBytes = TRUE), "\n", useBytes = TRUE)[[1]]
} else {
nregions <- readBin(zz, integer(), 1, size = 2)
ncharRegions <- readBin(zz, integer(), 1, size = ifelse(fformatVersion > 3, 4, 2))
regions <- strsplit(readChar(zz, ncharRegions, useBytes = useBytes), "\n", useBytes = useBytes)[[1]]
cpr <- readBin(zz, integer(), nregions, size = 4)
ncells <- sum(cpr)
if (any(cpr != 1)) {
cellnames <- paste(rep(regions, cpr), seq_len(ncells), sep = ".")
} else {
cellnames <- regions
}
}
nelem <- readBin(zz, integer(), 1, size = 4)
ncharData <- readBin(zz, integer(), 1, size = 4)
datanames <- strsplit(readChar(zz, ncharData, useBytes = useBytes), "\n", useBytes = useBytes)[[1]]
output <- array(readBin(zz, numeric(), nelem, size = 4), c(ncells, nyears, nelem / ncells / nyears))
output[is.nan(output)] <- NA
if (length(cellnames) == 1) cellnames <- list(cellnames)
dimnames(output)[[1]] <- cellnames
if (yearList[1] > 0) dimnames(output)[[2]] <- paste("y", yearList, sep = "")
if (length(datanames) > 0) dimnames(output)[[3]] <- datanames
if (fformatVersion > 0 && ncharComment > 0) {
attr(output, "comment") <- strsplit(readChar(zz, ncharComment, useBytes = useBytes), "\n",
useBytes = useBytes)[[1]]
}
if (fformatVersion > 1 && ncharSets > 0) {
names(dimnames(output)) <- strsplit(readChar(zz, ncharSets, useBytes = useBytes), "\n",
useBytes = useBytes)[[1]]
}
if (fformatVersion > 2) {
readBin(zz, raw(), nbyteMetadata)
}
attr(output, "FileFormatVersion") <- fformatVersion
return(new("magpie", output))
}
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