Tcl Library Source Code

EuroTcl/OpenACS 11 - 12 JULY 2024, VIENNA

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textutil::wcswidth - Procedures to compute terminal width of strings

Table Of Contents


package require Tcl 8.5 9
package require textutil::wcswidth ?35.3?

::textutil::wcswidth string
::textutil::wcswidth_char char
::textutil::wcswidth_type char


The package textutil::wcswidth provides commands that determine character type and width when used in terminals, and the length of strings when printed in a terminal.

The data underlying the functionality of this package is provided by the Unicode database file

The complete set of procedures is described below.

Bugs, Ideas, Feedback

This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category textutil of the Tcllib Trackers. Please also report any ideas for enhancements you may have for either package and/or documentation.

When proposing code changes, please provide unified diffs, i.e the output of diff -u.

Note further that attachments are strongly preferred over inlined patches. Attachments can be made by going to the Edit form of the ticket immediately after its creation, and then using the left-most button in the secondary navigation bar.


regexp(n), split(n), string(n)


character type, character width, double-wide character, prefix, regular expression, string


Text processing