Pathname identifying location of buffer.
An external format spec.
A buffer whose contents are examined.
Length (an integer) up to which buffer should be examined.
DescriptionIf ef-spec is complete, then it is returned. Otherwise guess-external-format calls, in turn, functions on the list *file-encoding-detection-algorithm*. If a complete external format spec is returned it is used, otherwise the return value is passed to the next function. If the name of the external format spec returned by the last function on this list is :default, an error of type file-encoding-resolution-error is signaled. Otherwise guess-external-format proceeds to guess the eol-style.
To guess the eol-style, functions on the list *file-eol-style-detection-algorithm* are called in turn. If a complete external format spec is returned it is used, otherwise the return value is passed to the next function. If the external format spec returned by the last function on this list does not contain :eol-style, an error of type file-encoding-resolution-error is signaled.
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