maybe_xlsx: Determine file format

In nacnudus/tidyxl: Read Untidy Excel Files

Determine file format

Description

Whether a file may be be xlsx, xlsm, xltx or xltm (rather than xls or xlt), based on the file signature or "magic number", rather than the filename extension.

Usage

maybe_xlsx(path)

Arguments

path

File path

Details

Only 'maybe', not 'is', because the xlsx magic number is common to all zip files, not specific to xlsx files. The inverse, 'is_xls' isn't possible either, because the xls magic number is common to other Microsoft Office files such as .doc and .ppt.

This uses some logic from Jenny Bryan's commit to the readxl package.

Value

Logicial

Examples

examples_xlsx <- system.file("extdata/examples.xlsx", package = "tidyxl")
examples_xlsm <- system.file("extdata/examples.xlsm", package = "tidyxl")
examples_xltx <- system.file("extdata/examples.xltx", package = "tidyxl")
examples_xltm <- system.file("extdata/examples.xltm", package = "tidyxl")
examples_xlsb <- system.file("extdata/examples.xlsb", package = "tidyxl")
examples_xls <- system.file("extdata/examples.xls", package = "tidyxl")

maybe_xlsx(examples_xlsx)
maybe_xlsx(examples_xlsm)
maybe_xlsx(examples_xltx)
maybe_xlsx(examples_xltm)
maybe_xlsx(examples_xlsb)
maybe_xlsx(examples_xls)

nacnudus/tidyxl documentation built on Jan. 17, 2024, 9:26 a.m.