Tcl8.6.16/Tk8.6.16 Documentation > Tcl Commands, version 8.6.16 > encoding

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NAME

encoding — Manipulate encodings

SYNOPSIS

INTRODUCTION

DESCRIPTION

encoding convertfrom ?encoding? data

encoding convertto ?encoding? string

encoding dirs ?directoryList?

encoding names

encoding system ?encoding?

EXAMPLE

SEE ALSO

KEYWORDS

NAME

SYNOPSIS

INTRODUCTION

Different operating system interfaces or applications may generate strings in other encodings such as Shift-JIS. The encoding command helps to bridge the gap between Unicode and these other formats.

DESCRIPTION

encoding convertfrom ?encoding? data

Convert data to Unicode from the specified encoding. The characters in data are treated as binary data where the lower 8-bits of each character is taken as a single byte. The resulting sequence of bytes is treated as a string in the specified encoding. If encoding is not specified, the current system encoding is used.

encoding convertto ?encoding? string

Convert string from Unicode to the specified encoding. The result is a sequence of bytes that represents the converted string. Each byte is stored in the lower 8-bits of a Unicode character (indeed, the resulting string is a binary string as far as Tcl is concerned, at least initially). If encoding is not specified, the current system encoding is used.

encoding dirs ?directoryList?

Tcl can load encoding data files from the file system that describe additional encodings for it to work with. This command sets the search path for *.enc encoding data files to the list of directories directoryList. If directoryList is omitted then the command returns the current list of directories that make up the search path. It is an error for directoryList to not be a valid list. If, when a search for an encoding data file is happening, an element in directoryList does not refer to a readable, searchable directory, that element is ignored.

encoding names

Returns a list containing the names of all of the encodings that are currently available. The encodings “utf-8” and “iso8859-1” are guaranteed to be present in the list.

encoding system ?encoding?

Set the system encoding to encoding. If encoding is omitted then the command returns the current system encoding. The system encoding is used whenever Tcl passes strings to system calls.

EXAMPLE

set s [encoding convertfrom euc-jp "\xA4\xCF"]

The result is the unicode codepoint: “\u306F”, which is the Hiragana letter HA.

SEE ALSO

KEYWORDS