66.6.3 Basic Coding System Functions

Function: find-coding-system coding-system-or-name

This function retrieves the coding system of the given name.

If coding-system-or-name is a coding-system object, it is simply returned. Otherwise, coding-system-or-name should be a symbol. If there is no such coding system, nil is returned. Otherwise the associated coding system object is returned.

Function: get-coding-system name

This function retrieves the coding system of the given name. Same as find-coding-system except an error is signalled if there is no such coding system instead of returning nil.

Function: coding-system-list

This function returns a list of the names of all defined coding systems.

Function: coding-system-name coding-system

This function returns the name of the given coding system.

Function: coding-system-base coding-system

Returns the base coding system (undecided EOL convention) coding system.

Function: make-coding-system name type &optional doc-string props

This function registers symbol name as a coding system.

type describes the conversion method used and should be one of the types listed in Coding System Types.

doc-string is a string describing the coding system.

props is a property list, describing the specific nature of the character set. Recognized properties are as in Coding System Properties.

Function: copy-coding-system old-coding-system new-name

This function copies old-coding-system to new-name. If new-name does not name an existing coding system, a new one will be created.

Function: subsidiary-coding-system coding-system eol-type

This function returns the subsidiary coding system of coding-system with eol type eol-type.