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utils.R
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utils.R
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to_posixct <- function(x) {
if (is_POSIXct(x)) {
posixct_standardize(x)
} else if (is_POSIXlt(x)) {
to_posixct_from_posixlt(x)
} else {
abort("Internal error: Should either be POSIXct/POSIXlt.")
}
}
is_Date <- function(x) {
inherits(x, "Date")
}
is_POSIXt <- function(x) {
inherits(x, "POSIXt")
}
is_POSIXct <- function(x) {
inherits(x, "POSIXct")
}
is_POSIXlt <- function(x) {
inherits(x, "POSIXlt")
}
posixct_standardize <- function(x) {
if (identical(typeof(x), "double")) {
return(x)
}
# Convert rare integer POSIXct to double
# Preserves names
storage.mode(x) <- "double"
x
}
to_posixct_from_posixlt <- function(x) {
as.POSIXct.POSIXlt(x)
}
date_standardize <- function(x) {
if (identical(typeof(x), "double")) {
return(x)
}
# Convert somewhat rare integer Date to double.
# Preserves names.
storage.mode(x) <- "double"
x
}
# ------------------------------------------------------------------------------
ones_along <- function(x, na_propagate = FALSE) {
out <- rep(1L, vec_size(x))
if (!na_propagate) {
return(out)
}
na <- vec_equal_na(x)
if (any(na)) {
out[na] <- NA_integer_
}
out
}
zeros_along <- function(x, na_propagate = FALSE) {
out <- vector("integer", length = vec_size(x))
if (!na_propagate) {
return(out)
}
na <- vec_equal_na(x)
if (any(na)) {
out[na] <- NA_integer_
}
out
}
# ------------------------------------------------------------------------------
unstructure <- function(x) {
set_attributes(x, NULL)
}
set_attributes <- function(x, attributes) {
attributes(x) <- attributes
x
}
# ------------------------------------------------------------------------------
posixt_tzone <- function(x) {
tzone <- attr(x, "tzone", exact = TRUE)
posixt_tzone_standardize(tzone)
}
posixt_set_tzone <- function(x, tzone) {
attr(x, "tzone") <- tzone
x
}
# Standardize an R time zone attribute
#
# This is slightly different from the lubridate version. For POSIXlt objects,
# the time zone attribute might be a character vector of length 3. If the first
# element is `""` (which happens on a Mac with `as.POSIXlt(Sys.time())`), then
# lubridate will look to the second element and will use that as the time zone.
# I think this is incorrect, because those are always time zone abbreviations,
# and will fail to load because they aren't true time zone names. I think that
# is the reason Vitalie opened the issue noted below, and the reason for the
# time zone map in lubridate. This function works more like
# `lubridate:::tz.POSIXt()` which just takes the first element of the tzone
# attribute. https://github.com/google/cctz/issues/46
# https://github.com/tidyverse/lubridate/blob
posixt_tzone_standardize <- function(tzone) {
if (is_null(tzone)) {
# Like `Sys.time()`
return("")
}
if (!is_character(tzone)) {
abort("A POSIXt time zone should either be a character vector or `NULL`.")
}
n <- length(tzone)
if (n == 0L) {
warning(paste0(
"POSIXt input had a corrupt time zone attribute of `character(0)`. ",
"Defaulting to the current zone by assuming the zone is `\"\"`."
))
return("")
}
if (n == 1L) {
return(tzone)
}
# Otherwise `n > 1`, likely `n == 3` for a POSIXt with time zone
# abbreviations. The first element is either a full time zone name, or `""`,
# so we use that
tzone <- tzone[[1]]
tzone
}
# ------------------------------------------------------------------------------
stop_clock <- function(message, class = character()) {
rlang::abort(message, class = c(class, "clock_error"))
}
stop_clock_unsupported_conversion <- function(x, to_arg) {
to_arg <- paste0("<", to_arg, ">")
message <- paste0("Can't convert ", paste_class(x), " to ", to_arg, ".")
stop_clock(message, "clock_error_unsupported_conversion")
}
stop_clock_unsupported_calendar_op <- function(op) {
message <- paste0("This calendar doesn't support `", op, "()`.")
stop_clock(message, "clock_error_unsupported_calendar_op")
}
stop_clock_unsupported_time_point_op <- function(op) {
message <- paste0("Time points don't support `", op, "()`.")
stop_clock(message, "clock_error_unsupported_time_point_op")
}
stop_clock_unsupported_zoned_time_op <- function(op) {
message <- paste0("Zoned-times don't support `", op, "()`.")
stop_clock(message, "clock_error_unsupported_zoned_time_op")
}
# Thrown from C++
stop_clock_invalid_date <- function(i) {
header <- paste0(
"Invalid date found at location ", i, "."
)
bullet <- format_error_bullets(
c(i = "Resolve invalid date issues by specifying the `invalid` argument.")
)
message <- paste0(header, "\n", bullet)
stop_clock(message, "clock_error_invalid_date")
}
# Thrown from C++
stop_clock_nonexistent_time <- function(i) {
header <- paste0(
"Nonexistent time due to daylight saving time at location ", i, "."
)
bullet <- format_error_bullets(
c(i = "Resolve nonexistent time issues by specifying the `nonexistent` argument.")
)
message <- paste0(header, "\n", bullet)
stop_clock(message, "clock_error_nonexistent_time")
}
# Thrown from C++
stop_clock_ambiguous_time <- function(i) {
header <- paste0(
"Ambiguous time due to daylight saving time at location ", i, "."
)
bullet <- format_error_bullets(
c(i = "Resolve ambiguous time issues by specifying the `ambiguous` argument.")
)
message <- paste0(header, "\n", bullet)
stop_clock(message, "clock_error_ambiguous_time")
}
paste_class <- function(x) {
out <- paste0(class(x), collapse = "/")
paste0("<", out, ">")
}
# ------------------------------------------------------------------------------
warn_clock <- function(message, class = character()) {
rlang::warn(message, class = c(class, "clock_warning"))
}
# Thrown from C++
warn_clock_parse_failures <- function(n, first) {
if (n == 0) {
abort("Internal error: warning thrown with zero failures.")
} else if (n == 1) {
message <- paste0(
"Failed to parse 1 string at location ", first, ". ",
"Returning `NA` at that location."
)
} else {
message <- paste0(
"Failed to parse ", n, " strings, beginning at location ", first, ". ",
"Returning `NA` at the locations where there were parse failures."
)
}
warn_clock(message, "clock_warning_parse_failures")
}
# Thrown from C++
warn_clock_format_failures <- function(n, first) {
if (n == 0) {
abort("Internal error: warning thrown with zero failures.")
} else if (n == 1) {
message <- paste0(
"Failed to format 1 string at location ", first, ". ",
"Returning `NA` at that location."
)
} else {
message <- paste0(
"Failed to format ", n, " strings, beginning at location ", first, ". ",
"Returning `NA` at the locations where there were format failures."
)
}
warn_clock(message, "clock_warning_format_failures")
}
# ------------------------------------------------------------------------------
max_collect <- function(max) {
if (is_null(max)) {
max <- getOption("max.print", default = 1000L)
}
max <- vec_cast(max, integer(), x_arg = "max")
if (!is_number(max)) {
abort("`max` must be a single number, or `NULL`.")
}
if (max <= 0L) {
abort("`max` must be a positive number.")
}
max
}
max_slice <- function(x, max) {
if (max < vec_size(x)) {
vec_slice(x, seq_len(max))
} else {
x
}
}
clock_print <- function(x, max) {
max <- max_collect(max)
obj_print(x, max = max)
invisible(x)
}
clock_print_footer <- function(x, max) {
size <- vec_size(x)
if (max >= size) {
return(invisible(x))
}
n_omitted <- size - max
if (n_omitted == 1L) {
value <- " value."
} else {
value <- " values."
}
cat(
"Reached `max` or `getOption('max.print')`. ",
"Omitted ", n_omitted, value,
"\n",
sep = ""
)
invisible(x)
}
# ------------------------------------------------------------------------------
is_number <- function(x) {
if (length(x) != 1L) {
FALSE
} else if (typeof(x) != "integer") {
FALSE
} else if (is.na(x)) {
FALSE
} else {
TRUE
}
}
is_last <- function(x) {
identical(x, "last")
}
if_else <- function(condition, true, false, na = NULL) {
vec_assert(condition, logical())
# output size from `condition`
size <- vec_size(condition)
# output type from `true`/`false`/`na`
ptype <- vec_ptype_common(true = true, false = false, na = na)
args <- vec_recycle_common(true = true, false = false, na = na, .size = size)
args <- vec_cast_common(!!!args, .to = ptype)
out <- vec_init(ptype, size)
loc_true <- condition
loc_false <- !condition
out <- vec_assign(out, loc_true, vec_slice(args$true, loc_true))
out <- vec_assign(out, loc_false, vec_slice(args$false, loc_false))
if (!is_null(na)) {
loc_na <- vec_equal_na(condition)
out <- vec_assign(out, loc_na, vec_slice(args$na, loc_na))
}
out
}