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patch 9.0.1598: screenchar() and others are wrong with DBCS 'encoding'

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Problem:    screenchar(), screenchars() and screenstring() do not work
            properly when 'encoding' is set to a double-byte encoding.
Solution:   Fix the way the bytes of the characters are obtained.
            (issue #12469)
This commit is contained in:
zeertzjq
2023-06-01 20:26:55 +01:00
committed by Bram Moolenaar
parent 8509014add
commit 47eec6716b
5 changed files with 58 additions and 35 deletions
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13
src/testdir/test_utf8.vim
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@@ -135,6 +135,19 @@ func Test_screenchar_utf8()
call assert_equal("B", screenstring(1, 2))
call assert_equal("C\u0308", screenstring(1, 3))
" 1-cell, with 6 composing characters
set maxcombine=6
call setline(1, ["ABC" .. repeat("\u0308", 6)])
redraw
call assert_equal([0x0041], screenchars(1, 1))
call assert_equal([0x0042], 1->screenchars(2))
" This should not use uninitialized memory
call assert_equal([0x0043] + repeat([0x0308], 6), screenchars(1, 3))
call assert_equal("A", screenstring(1, 1))
call assert_equal("B", screenstring(1, 2))
call assert_equal("C" .. repeat("\u0308", 6), screenstring(1, 3))
set maxcombine&
" 2-cells, with composing characters
let text = "\u3042\u3044\u3046\u3099"
call setline(1, text)