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9c94389c3e
The function git_wcwidth() returns for a given unicode code point the width on the display: -1 for control characters, 0 for combining or other non-visible code points 1 for e.g. ASCII 2 for double-width code points. This table had been originally been extracted for one Unicode version, probably 3.2. We now use two tables these days, one for zero-width and another for double-width. Make it easier to update these tables to a later version of Unicode by factoring out the table from utf8.c into unicode_width.h and add the script update_unicode.sh to update the table based on the latest Unicode specification files. Thanks to Peter Krefting <peter@softwolves.pp.se> and Kevin Bracey <kevin@bracey.fi> for helping with their Unicode knowledge. Signed-off-by: Torsten Bögershausen <tboegi@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
37 lines
1.1 KiB
Bash
Executable file
37 lines
1.1 KiB
Bash
Executable file
#!/bin/sh
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#See http://www.unicode.org/reports/tr44/
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#
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#Me Enclosing_Mark an enclosing combining mark
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#Mn Nonspacing_Mark a nonspacing combining mark (zero advance width)
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#Cf Format a format control character
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#
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UNICODEWIDTH_H=../unicode_width.h
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if ! test -d unicode; then
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mkdir unicode
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fi &&
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( cd unicode &&
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if ! test -f UnicodeData.txt; then
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wget http://www.unicode.org/Public/UCD/latest/ucd/UnicodeData.txt
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fi &&
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if ! test -f EastAsianWidth.txt; then
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wget http://www.unicode.org/Public/UCD/latest/ucd/EastAsianWidth.txt
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fi &&
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if ! test -d uniset; then
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git clone https://github.com/depp/uniset.git
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fi &&
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(
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cd uniset &&
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if ! test -x uniset; then
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autoreconf -i &&
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./configure --enable-warnings=-Werror CFLAGS='-O0 -ggdb'
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fi &&
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make
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) &&
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echo "static const struct interval zero_width[] = {" >$UNICODEWIDTH_H &&
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UNICODE_DIR=. ./uniset/uniset --32 cat:Me,Mn,Cf + U+1160..U+11FF - U+00AD |
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grep -v plane >>$UNICODEWIDTH_H &&
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echo "};" >>$UNICODEWIDTH_H &&
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echo "static const struct interval double_width[] = {" >>$UNICODEWIDTH_H &&
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UNICODE_DIR=. ./uniset/uniset --32 eaw:F,W >>$UNICODEWIDTH_H &&
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echo "};" >>$UNICODEWIDTH_H
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)
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