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git/update_unicode.sh
Torsten Bögershausen 9c94389c3e utf8: make it easier to auto-update git_wcwidth()
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>
2014-05-12 10:38:01 -07:00

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#!/bin/sh
#See http://www.unicode.org/reports/tr44/
#
#Me Enclosing_Mark an enclosing combining mark
#Mn Nonspacing_Mark a nonspacing combining mark (zero advance width)
#Cf Format a format control character
#
UNICODEWIDTH_H=../unicode_width.h
if ! test -d unicode; then
mkdir unicode
fi &&
( cd unicode &&
if ! test -f UnicodeData.txt; then
wget http://www.unicode.org/Public/UCD/latest/ucd/UnicodeData.txt
fi &&
if ! test -f EastAsianWidth.txt; then
wget http://www.unicode.org/Public/UCD/latest/ucd/EastAsianWidth.txt
fi &&
if ! test -d uniset; then
git clone https://github.com/depp/uniset.git
fi &&
(
cd uniset &&
if ! test -x uniset; then
autoreconf -i &&
./configure --enable-warnings=-Werror CFLAGS='-O0 -ggdb'
fi &&
make
) &&
echo "static const struct interval zero_width[] = {" >$UNICODEWIDTH_H &&
UNICODE_DIR=. ./uniset/uniset --32 cat:Me,Mn,Cf + U+1160..U+11FF - U+00AD |
grep -v plane >>$UNICODEWIDTH_H &&
echo "};" >>$UNICODEWIDTH_H &&
echo "static const struct interval double_width[] = {" >>$UNICODEWIDTH_H &&
UNICODE_DIR=. ./uniset/uniset --32 eaw:F,W >>$UNICODEWIDTH_H &&
echo "};" >>$UNICODEWIDTH_H
)