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drop ambiguous-wide behaviour from Unicode CJK locales

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Thomas Wolff 2020-10-07 18:35:54 +02:00 committed by Corinna Vinschen
parent 2031b48c93
commit 1ed2fe0f03
1 changed files with 5 additions and 13 deletions
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18
newlib/libc/locale/locale.c
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@ -78,12 +78,9 @@ This implementation also supports the modifiers <<"cjknarrow">> and
<<"cjkwide">>, which affect how the functions <<wcwidth>> and <<wcswidth>>
handle characters from the "CJK Ambiguous Width" category of characters
described at http://www.unicode.org/reports/tr11/#Ambiguous.
These characters have a width of 1 for singlebyte charsets and a width of 2
for multibyte charsets other than UTF-8.
For UTF-8, their width depends on the language specifier:
it is 2 for <<"zh">> (Chinese), <<"ja">> (Japanese), and <<"ko">> (Korean),
and 1 for everything else. Specifying <<"cjknarrow">> or <<"cjkwide">>
forces a width of 1 or 2, respectively, independent of charset and language.
These characters have a width of 1 for singlebyte charsets and UTF-8,
and a width of 2 for multibyte charsets other than UTF-8. Specifying
<<"cjknarrow">> or <<"cjkwide">> forces a width of 1 or 2, respectively.
This implementation also supports the modifier <<"cjksingle">>
to enforce single-width character properties.
@ -903,17 +900,12 @@ restart:
/* Determine the width for the "CJK Ambiguous Width" category of
characters. This is used in wcwidth(). Assume single width for
single-byte charsets, and double width for multi-byte charsets
other than UTF-8. For UTF-8, use double width for the East Asian
languages ("ja", "ko", "zh"), and single width for everything else.
other than UTF-8. For UTF-8, use single width.
Single width can also be forced with the "@cjknarrow" modifier.
Double width can also be forced with the "@cjkwide" modifier.
*/
loc->cjk_lang = cjkwide ||
(!cjknarrow && mbc_max > 1
&& (charset[0] != 'U'
|| strncmp (locale, "ja", 2) == 0
|| strncmp (locale, "ko", 2) == 0
|| strncmp (locale, "zh", 2) == 0));
(!cjknarrow && mbc_max > 1 && charset[0] != 'U');
if (cjksingle)
loc->cjk_lang = -1; /* Disable CJK dual-width */
#ifdef __HAVE_LOCALE_INFO__