isCompressed {ngsReports} | R Documentation

## Check to see if a file is compressed

### Description

Check to see if a file, or vector of files is compressed

### Usage

    isCompressed(path, type = c("zip", "gzip"), verbose = FALSE)

### Arguments

`path` | The path to one or more files
`type` | The type of compression to check for. Currently only ZIP/GZIP files have been implemented.
`verbose` | logical/integer Determine the level of output to show as messages

### Details

Reads the first four bytes from the local file header. If the file is a .ZIP file, this should match the magic number `PK\003\004`.

This function assumes that the first thing in a zip archive is the .ZIP entry with the local file header signature. ZIP files containing a self-extracting archive may not exhibit this structure and will return FALSE

### Value

A `logical` vector

### Examples

    # Get the files included with the package
    fileDir <- system.file("extdata", package = "ngsReports")
    allFiles <- list.files(fileDir, pattern = "zip$", full.names = TRUE)
    isCompressed(allFiles)

[Package ngsReports version 1.6.1 Index]