Mercurial > vim
view src/testdir/test_regex_char_classes.vim @ 34074:1629cc65d78d v9.1.0006
patch 9.1.0006: is*() and to*() function may be unsafe
Commit: https://github.com/vim/vim/commit/184f71cc6868a240dc872ed2852542bbc1d43e28
Author: Keith Thompson <Keith.S.Thompson@gmail.com>
Date: Thu Jan 4 21:19:04 2024 +0100
patch 9.1.0006: is*() and to*() function may be unsafe
Problem: is*() and to*() function may be unsafe
Solution: Add SAFE_* macros and start using those instead
(Keith Thompson)
Use SAFE_() macros for is*() and to*() functions
The standard is*() and to*() functions declared in <ctype.h> have
undefined behavior for negative arguments other than EOF. If plain char
is signed, passing an unchecked value from argv for from user input
to one of these functions has undefined behavior.
Solution: Add SAFE_*() macros that cast the argument to unsigned char.
Most implementations behave sanely for negative arguments, and most
character values in practice are non-negative, but it's still best
to avoid undefined behavior.
The change from #13347 has been omitted, as this has already been
separately fixed in commit ac709e2fc0db6d31abb7da96f743c40956b60c3a
(v9.0.2054)
fixes: #13332
closes: #13347
Signed-off-by: Keith Thompson <Keith.S.Thompson@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
author | Christian Brabandt <cb@256bit.org> |
---|---|
date | Thu, 04 Jan 2024 21:30:04 +0100 |
parents | 08940efa6b4e |
children |
line wrap: on
line source
" Tests for regexp with backslash and other special characters inside [] " Also test backslash for hex/octal numbered character. " scriptencoding utf-8 function RunSTest(value, calls, expected) new call feedkeys("i" . a:value, "mx") exec a:calls call assert_equal(a:expected, getline(1), printf("wrong result for %s", a:calls)) quit! endfunction function RunXTest(value, search_exp, expected) new call feedkeys("i" . a:value, "mx") call feedkeys("gg" . a:search_exp . "\nx", "mx") call assert_equal(a:expected, getline(1), printf("wrong result for %s", a:search_exp)) quit! endfunction function Test_x_search() let res = "test text test text" call RunXTest("test \\text test text", "/[\\x]", res) call RunXTest("test \ttext test text", "/[\\t\\]]", res) call RunXTest("test text ]test text", "/[]y]", res) call RunXTest("test ]text test text", "/[\\]]", res) call RunXTest("test text te^st text", "/[y^]", res) call RunXTest("test te$xt test text", "/[$y]", res) call RunXTest("test taext test text", "/[\\x61]", res) call RunXTest("test tbext test text","/[\\x60-\\x64]", res) call RunXTest("test 5text test text","/[\\x785]", res) call RunXTest("testc text test text","/[\\o143]", res) call RunXTest("tesdt text test text","/[\\o140-\\o144]", res) call RunXTest("test7 text test text", "/[\\o417]", res) call RunXTest("test text tBest text", "/\\%x42", res) call RunXTest("test text teCst text", "/\\%o103", res) call RunXTest("test text \<C-V>x00test text", "/[\\x00]", res) endfunction function Test_s_search() let res = "test text test text" call RunSTest("test te\<C-V>x00xt t\<C-V>x04est t\<C-V>x10ext", "s/[\\x00-\\x10]//g", res) call RunSTest("test \\xyztext test text", "s/[\\x-z]\\+//", res) call RunSTest("test text tev\\uyst text", "s/[\\u-z]\\{2,}//", res) call RunSTest("xx aaaaa xx a", "s/\\(a\\)\\+//", "xx xx a") call RunSTest("xx aaaaa xx a", "s/\\(a*\\)\\+//", "xx aaaaa xx a") call RunSTest("xx aaaaa xx a", "s/\\(a*\\)*//", "xx aaaaa xx a") call RunSTest("xx aaaaa xx", "s/\\(a\\)\\{2,3}/A/", "xx Aaa xx") call RunSTest("xx aaaaa xx", "s/\\(a\\)\\{-2,3}/A/", "xx Aaaa xx") call RunSTest("xx aaa12aa xx", "s/\\(a\\)*\\(12\\)\\@>/A/", "xx Aaa xx") call RunSTest("xx foobar xbar xx", "s/\\(foo\\)\\@<!bar/A/", "xx foobar xA xx") call RunSTest("xx an file xx", "s/\\(an\\_s\\+\\)\\@<=file/A/", "xx an A xx") call RunSTest("x= 9;", "s/^\\(\\h\\w*\\%(->\\|\\.\\)\\=\\)\\+=/XX/", "XX 9;") call RunSTest("hh= 77;", "s/^\\(\\h\\w*\\%(->\\|\\.\\)\\=\\)\\+=/YY/", "YY 77;") call RunSTest(" aaa ", "s/aaa/xyz/", " xyz ") call RunSTest(" xyz", "s/~/bcd/", " bcd") call RunSTest(" bcdbcdbcd", "s/~\\+/BB/", " BB") endfunction " Test character classes in regexp using regexpengine 0, 1, 2. func Test_regex_char_classes() new let save_enc = &encoding set encoding=utf-8 let input = "\t\<C-L>\<C-M> !\"#$%&'()#+'-./0123456789:;<=>?@ABCDEFGHIXYZ[\]^_`abcdefghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱" " Format is [cmd_to_run, expected_output] let tests = [ \ [':s/\%#=0\d//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./:;<=>?@ABCDEFGHIXYZ[\]^_`abcdefghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=1\d//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./:;<=>?@ABCDEFGHIXYZ[\]^_`abcdefghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=2\d//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./:;<=>?@ABCDEFGHIXYZ[\]^_`abcdefghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=0[0-9]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./:;<=>?@ABCDEFGHIXYZ[\]^_`abcdefghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=1[0-9]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./:;<=>?@ABCDEFGHIXYZ[\]^_`abcdefghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=2[0-9]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./:;<=>?@ABCDEFGHIXYZ[\]^_`abcdefghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=0\D//g', \ "0123456789"], \ [':s/\%#=1\D//g', \ "0123456789"], \ [':s/\%#=2\D//g', \ "0123456789"], \ [':s/\%#=0[^0-9]//g', \ "0123456789"], \ [':s/\%#=1[^0-9]//g', \ "0123456789"], \ [':s/\%#=2[^0-9]//g', \ "0123456789"], \ [':s/\%#=0\o//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./89:;<=>?@ABCDEFGHIXYZ[\]^_`abcdefghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=1\o//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./89:;<=>?@ABCDEFGHIXYZ[\]^_`abcdefghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=2\o//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./89:;<=>?@ABCDEFGHIXYZ[\]^_`abcdefghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=0[0-7]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./89:;<=>?@ABCDEFGHIXYZ[\]^_`abcdefghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=1[0-7]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./89:;<=>?@ABCDEFGHIXYZ[\]^_`abcdefghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=2[0-7]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./89:;<=>?@ABCDEFGHIXYZ[\]^_`abcdefghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=0\O//g', \ "01234567"], \ [':s/\%#=1\O//g', \ "01234567"], \ [':s/\%#=2\O//g', \ "01234567"], \ [':s/\%#=0[^0-7]//g', \ "01234567"], \ [':s/\%#=1[^0-7]//g', \ "01234567"], \ [':s/\%#=2[^0-7]//g', \ "01234567"], \ [':s/\%#=0\x//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./:;<=>?@GHIXYZ[\]^_`ghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=1\x//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./:;<=>?@GHIXYZ[\]^_`ghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=2\x//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./:;<=>?@GHIXYZ[\]^_`ghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=0[0-9A-Fa-f]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./:;<=>?@GHIXYZ[\]^_`ghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=1[0-9A-Fa-f]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./:;<=>?@GHIXYZ[\]^_`ghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=2[0-9A-Fa-f]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./:;<=>?@GHIXYZ[\]^_`ghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=0\X//g', \ "0123456789ABCDEFabcdef"], \ [':s/\%#=1\X//g', \ "0123456789ABCDEFabcdef"], \ [':s/\%#=2\X//g', \ "0123456789ABCDEFabcdef"], \ [':s/\%#=0[^0-9A-Fa-f]//g', \ "0123456789ABCDEFabcdef"], \ [':s/\%#=1[^0-9A-Fa-f]//g', \ "0123456789ABCDEFabcdef"], \ [':s/\%#=2[^0-9A-Fa-f]//g', \ "0123456789ABCDEFabcdef"], \ [':s/\%#=0\w//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./:;<=>?@[\]^`{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=1\w//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./:;<=>?@[\]^`{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=2\w//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./:;<=>?@[\]^`{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=0[0-9A-Za-z_]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./:;<=>?@[\]^`{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=1[0-9A-Za-z_]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./:;<=>?@[\]^`{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=2[0-9A-Za-z_]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./:;<=>?@[\]^`{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=0\W//g', \ "0123456789ABCDEFGHIXYZ_abcdefghiwxyz"], \ [':s/\%#=1\W//g', \ "0123456789ABCDEFGHIXYZ_abcdefghiwxyz"], \ [':s/\%#=2\W//g', \ "0123456789ABCDEFGHIXYZ_abcdefghiwxyz"], \ [':s/\%#=0[^0-9A-Za-z_]//g', \ "0123456789ABCDEFGHIXYZ_abcdefghiwxyz"], \ [':s/\%#=1[^0-9A-Za-z_]//g', \ "0123456789ABCDEFGHIXYZ_abcdefghiwxyz"], \ [':s/\%#=2[^0-9A-Za-z_]//g', \ "0123456789ABCDEFGHIXYZ_abcdefghiwxyz"], \ [':s/\%#=0\h//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./0123456789:;<=>?@[\]^`{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=1\h//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./0123456789:;<=>?@[\]^`{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=2\h//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./0123456789:;<=>?@[\]^`{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=0[A-Za-z_]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./0123456789:;<=>?@[\]^`{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=1[A-Za-z_]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./0123456789:;<=>?@[\]^`{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=2[A-Za-z_]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./0123456789:;<=>?@[\]^`{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=0\H//g', \ "ABCDEFGHIXYZ_abcdefghiwxyz"], \ [':s/\%#=1\H//g', \ "ABCDEFGHIXYZ_abcdefghiwxyz"], \ [':s/\%#=2\H//g', \ "ABCDEFGHIXYZ_abcdefghiwxyz"], \ [':s/\%#=0[^A-Za-z_]//g', \ "ABCDEFGHIXYZ_abcdefghiwxyz"], \ [':s/\%#=1[^A-Za-z_]//g', \ "ABCDEFGHIXYZ_abcdefghiwxyz"], \ [':s/\%#=2[^A-Za-z_]//g', \ "ABCDEFGHIXYZ_abcdefghiwxyz"], \ [':s/\%#=0\a//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./0123456789:;<=>?@[\]^_`{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=1\a//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./0123456789:;<=>?@[\]^_`{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=2\a//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./0123456789:;<=>?@[\]^_`{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=0[A-Za-z]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./0123456789:;<=>?@[\]^_`{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=1[A-Za-z]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./0123456789:;<=>?@[\]^_`{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=2[A-Za-z]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./0123456789:;<=>?@[\]^_`{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=0\A//g', \ "ABCDEFGHIXYZabcdefghiwxyz"], \ [':s/\%#=1\A//g', \ "ABCDEFGHIXYZabcdefghiwxyz"], \ [':s/\%#=2\A//g', \ "ABCDEFGHIXYZabcdefghiwxyz"], \ [':s/\%#=0[^A-Za-z]//g', \ "ABCDEFGHIXYZabcdefghiwxyz"], \ [':s/\%#=1[^A-Za-z]//g', \ "ABCDEFGHIXYZabcdefghiwxyz"], \ [':s/\%#=2[^A-Za-z]//g', \ "ABCDEFGHIXYZabcdefghiwxyz"], \ [':s/\%#=0\l//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./0123456789:;<=>?@ABCDEFGHIXYZ[\]^_`{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=1\l//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./0123456789:;<=>?@ABCDEFGHIXYZ[\]^_`{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=2\l//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./0123456789:;<=>?@ABCDEFGHIXYZ[\]^_`{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=0[a-z]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./0123456789:;<=>?@ABCDEFGHIXYZ[\]^_`{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=1[a-z]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./0123456789:;<=>?@ABCDEFGHIXYZ[\]^_`{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=2[a-z]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./0123456789:;<=>?@ABCDEFGHIXYZ[\]^_`{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=0\L//g', \ "abcdefghiwxyz"], \ [':s/\%#=1\L//g', \ "abcdefghiwxyz"], \ [':s/\%#=2\L//g', \ "abcdefghiwxyz"], \ [':s/\%#=0[^a-z]//g', \ "abcdefghiwxyz"], \ [':s/\%#=1[^a-z]//g', \ "abcdefghiwxyz"], \ [':s/\%#=2[^a-z]//g', \ "abcdefghiwxyz"], \ [':s/\%#=0\u//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./0123456789:;<=>?@[\]^_`abcdefghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=1\u//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./0123456789:;<=>?@[\]^_`abcdefghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=2\u//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./0123456789:;<=>?@[\]^_`abcdefghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=0[A-Z]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./0123456789:;<=>?@[\]^_`abcdefghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=1[A-Z]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./0123456789:;<=>?@[\]^_`abcdefghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=2[A-Z]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./0123456789:;<=>?@[\]^_`abcdefghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=0\U//g', \ "ABCDEFGHIXYZ"], \ [':s/\%#=1\U//g', \ "ABCDEFGHIXYZ"], \ [':s/\%#=2\U//g', \ "ABCDEFGHIXYZ"], \ [':s/\%#=0[^A-Z]//g', \ "ABCDEFGHIXYZ"], \ [':s/\%#=1[^A-Z]//g', \ "ABCDEFGHIXYZ"], \ [':s/\%#=2[^A-Z]//g', \ "ABCDEFGHIXYZ"], \ [':s/\%#=0\%' . line('.') . 'l^\t...//g', \ "!\"#$%&'()#+'-./0123456789:;<=>?@ABCDEFGHIXYZ[\]^_`abcdefghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=1\%' . line('.') . 'l^\t...//g', \ "!\"#$%&'()#+'-./0123456789:;<=>?@ABCDEFGHIXYZ[\]^_`abcdefghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=2\%' . line('.') . 'l^\t...//g', \ "!\"#$%&'()#+'-./0123456789:;<=>?@ABCDEFGHIXYZ[\]^_`abcdefghiwxyz{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=0[0-z]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=1[0-z]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=2[0-z]//g', \ "\t\<C-L>\<C-M> !\"#$%&'()#+'-./{|}~\<C-?>\u0080\u0082\u0090\u009bΡ记娱"], \ [':s/\%#=0[^0-z]//g', \ "0123456789:;<=>?@ABCDEFGHIXYZ[\]^_`abcdefghiwxyz"], \ [':s/\%#=1[^0-z]//g', \ "0123456789:;<=>?@ABCDEFGHIXYZ[\]^_`abcdefghiwxyz"], \ [':s/\%#=2[^0-z]//g', \ "0123456789:;<=>?@ABCDEFGHIXYZ[\]^_`abcdefghiwxyz"] \] for [cmd, expected] in tests call append(0, input) call cursor(1, 1) exe cmd call assert_equal(expected, getline(1), cmd) endfor let &encoding = save_enc enew! close endfunc " vim: shiftwidth=2 sts=2 expandtab