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#' Calculate frequencies from fixed width file without loading into memory
#'
#' Calculate the frequency of values in all variables in a fixed width file.
#' Does so without holding the whole data in memory or creating a full
#' R data.frame and calling R code on interim pieces. (Probably only
#' useful inside IPUMS HQ).
#'
#' @inheritParams hipread_long
#'
#' @return A list of frequencies
#' @export
#' @keywords internal
hipread_freqs <- function(
file, var_info, rt_info = hip_rt(1, 0),
compression = NULL, progress = show_progress()
) {
file <- check_file(file)
isgzipped <- is_gzip_compression(compression, file)
var_info <- add_level_to_rect(var_info)
var_names <- get_var_names(var_info)
var_pos_info <- get_var_pos(var_info, var_names)
var_types <- get_var_types(var_info, var_names)
read_freqs(
file, var_names, rt_info, var_pos_info, isgzipped, progress
)
}
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