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8-bit tweaks

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This commit is contained in:
Dave Love 2000-11-27 15:32:38 +00:00
parent b25e2fb558
commit 7f84d9ae46
1 changed files with 13 additions and 2 deletions
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15
lispref/nonascii.texi
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@ -177,12 +177,16 @@ If this is non-@code{nil}, it overrides @code{nonascii-insert-offset}.
This function converts the text of @var{string} to unibyte
representation, if it isn't already, and returns the result. If
@var{string} is a unibyte string, it is returned unchanged.
Multibyte character codes are converted to unibyte
by using just the low 8 bits.
@end defun
@defun string-make-multibyte string
This function converts the text of @var{string} to multibyte
representation, if it isn't already, and returns the result. If
@var{string} is a multibyte string, it is returned unchanged.
The function @code{unibyte-char-to-multibyte} is used to convert
each unibyte character to a multibyte character.
@end defun
@node Selecting a Representation
@ -221,7 +225,10 @@ treating each byte as a character. This means that the value may have
more characters than @var{string} has.
If @var{string} is already a unibyte string, then the value is
@var{string} itself.
@var{string} itself. Otherwise it is a newly created string, with no
text properties. If @var{string} is multibyte, any characters it
contains of charset @var{eight-bit-control} or @var{eight-bit-graphic}
are converted to the corresponding single byte.
@end defun
@defun string-as-multibyte string
@ -230,7 +237,11 @@ treating each multibyte sequence as one character. This means that the
value may have fewer characters than @var{string} has.
If @var{string} is already a multibyte string, then the value is
@var{string} itself.
@var{string} itself. Otherwise it is a newly created string, with no
text properties. If @var{string} is unibyte and contains any individual
8-bit bytes (i.e.@: not part of a multibyte form), they are converted to
the corresponding multibyte character of charset @var{eight-bit-control}
or @var{eight-bit-graphic}.
@end defun
@node Character Codes