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patch 9.0.1629: having utf16idx() rounding up is inconvenient

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Problem:    Having utf16idx() rounding up is inconvenient.
Solution:   Make utf16idx() round down. (Yegappan Lakshmanan, closes #12523)
This commit is contained in:
Yegappan Lakshmanan
2023-06-14 13:10:15 +01:00
committed by Bram Moolenaar
parent d5b952a871
commit 95707037af
4 changed files with 20 additions and 14 deletions
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20
src/testdir/test_functions.vim
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@@ -1518,14 +1518,14 @@ func Test_utf16idx_from_byteidx()
" UTF-16 index of a string with four byte characters
let str = 'a😊😊b'
call assert_equal(0, utf16idx(str, 0))
call assert_equal(2, utf16idx(str, 1))
call assert_equal(2, utf16idx(str, 2))
call assert_equal(2, utf16idx(str, 3))
call assert_equal(2, utf16idx(str, 4))
call assert_equal(4, utf16idx(str, 5))
call assert_equal(4, utf16idx(str, 6))
call assert_equal(4, utf16idx(str, 7))
call assert_equal(4, utf16idx(str, 8))
call assert_equal(1, utf16idx(str, 1))
call assert_equal(1, utf16idx(str, 2))
call assert_equal(1, utf16idx(str, 3))
call assert_equal(1, utf16idx(str, 4))
call assert_equal(3, utf16idx(str, 5))
call assert_equal(3, utf16idx(str, 6))
call assert_equal(3, utf16idx(str, 7))
call assert_equal(3, utf16idx(str, 8))
call assert_equal(5, utf16idx(str, 9))
call assert_equal(6, utf16idx(str, 10))
call assert_equal(-1, utf16idx(str, 11))
@@ -1621,8 +1621,8 @@ func Test_utf16idx_from_charidx()
" UTF-16 index of a string with four byte characters
let str = "a😊😊b"
call assert_equal(0, utf16idx(str, 0, v:false, v:true))
call assert_equal(2, utf16idx(str, 1, v:false, v:true))
call assert_equal(4, utf16idx(str, 2, v:false, v:true))
call assert_equal(1, utf16idx(str, 1, v:false, v:true))
call assert_equal(3, utf16idx(str, 2, v:false, v:true))
call assert_equal(5, utf16idx(str, 3, v:false, v:true))
call assert_equal(6, utf16idx(str, 4, v:false, v:true))
call assert_equal(-1, utf16idx(str, 5, v:false, v:true))