Nothing
# ---
# repo: r-lib/rlang
# file: standalone-sizes.R
# last-updated: 2022-06-23
# license: https://unlicense.org
# ---
#
# nocov start
format_bytes <- local({
pretty_bytes <- function(bytes, style = c("default", "nopad", "6")) {
style <- switch(
match.arg(style),
"default" = pretty_bytes_default,
"nopad" = pretty_bytes_nopad,
"6" = pretty_bytes_6
)
style(bytes)
}
compute_bytes <- function(bytes, smallest_unit = "B") {
units0 <- c("B", "kB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB")
stopifnot(
is.numeric(bytes),
is.character(smallest_unit),
length(smallest_unit) == 1,
!is.na(smallest_unit),
smallest_unit %in% units0
)
limits <- c(1000, 999950 * 1000 ^ (seq_len(length(units0) - 2) - 1))
low <- match(smallest_unit, units0)
units <- units0[low:length(units0)]
limits <- limits[low:length(limits)]
neg <- bytes < 0 & !is.na(bytes)
bytes <- abs(bytes)
mat <- matrix(
rep(bytes, each = length(limits)),
nrow = length(limits),
ncol = length(bytes)
)
mat2 <- matrix(mat < limits, nrow = length(limits), ncol = length(bytes))
exponent <- length(limits) - colSums(mat2) + low - 1L
res <- bytes / 1000 ^ exponent
unit <- units[exponent - low + 2L]
## Zero bytes
res[bytes == 0] <- 0
unit[bytes == 0] <- units[1]
## NA and NaN bytes
res[is.na(bytes)] <- NA_real_
res[is.nan(bytes)] <- NaN
unit[is.na(bytes)] <- units0[low] # Includes NaN as well
data.frame(
stringsAsFactors = FALSE,
amount = res,
unit = unit,
negative = neg
)
}
pretty_bytes_default <- function(bytes) {
szs <- compute_bytes(bytes)
amt <- szs$amount
## String. For fractions we always show two fraction digits
res <- character(length(amt))
int <- is.na(amt) | amt == as.integer(amt)
res[int] <- format(
ifelse(szs$negative[int], -1, 1) * amt[int],
scientific = FALSE
)
res[!int] <- sprintf("%.2f", ifelse(szs$negative[!int], -1, 1) * amt[!int])
format(paste(res, szs$unit), justify = "right")
}
pretty_bytes_nopad <- function(bytes) {
sub("^\\s+", "", pretty_bytes_default(bytes))
}
pretty_bytes_6 <- function(bytes) {
szs <- compute_bytes(bytes, smallest_unit = "kB")
amt <- szs$amount
na <- is.na(amt)
nan <- is.nan(amt)
neg <- !na & !nan & szs$negative
l10 <- !na & !nan & !neg & amt < 10
l100 <- !na & !nan & !neg & amt >= 10 & amt < 100
b100 <- !na & !nan & !neg & amt >= 100
szs$unit[neg] <- "kB"
famt <- character(length(amt))
famt[na] <- " NA"
famt[nan] <- "NaN"
famt[neg] <- "< 0"
famt[l10] <- sprintf("%.1f", amt[l10])
famt[l100] <- sprintf(" %.0f", amt[l100])
famt[b100] <- sprintf("%.0f", amt[b100])
paste0(famt, " ", szs$unit)
}
structure(
list(
.internal = environment(),
pretty_bytes = pretty_bytes,
compute_bytes = compute_bytes
),
class = c("standalone_bytes", "standalone")
)
})
# nocov end
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