File 0787-ssh-Fix-cli-problems-at-line-end.patch of Package erlang

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File 0787-ssh-Fix-cli-problems-at-line-end.patch of Package erlang (Revision ac78bcc5a6f7a4d1efd770008567e9f7)

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From 1891b32adb8fabfd45a57af55c4cb14959a536eb Mon Sep 17 00:00:00 2001
From: Hans Nilsson <hans@erlang.org>
Date: Tue, 15 Oct 2019 15:22:15 +0200
Subject: [PATCH] ssh: Fix cli problems at line end

Was a bug when one

1) wrote a few chars,
  2) moved back and inserted more chars until the
     last chars should flow into the next line

The cursor then jumped one line above what one expects
---
 lib/ssh/src/ssh_cli.erl | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/lib/ssh/src/ssh_cli.erl b/lib/ssh/src/ssh_cli.erl
index c386806cb5..7f04fcb804 100644
--- a/lib/ssh/src/ssh_cli.erl
+++ b/lib/ssh/src/ssh_cli.erl
@@ -366,7 +366,7 @@ insert_chars([], {Buf, BufTail, Col}, _Tty) ->
 insert_chars(Chars, {Buf, BufTail, Col}, Tty) ->
     {NewBuf, _NewBufTail, WriteBuf, NewCol} =
 	conv_buf(Chars, Buf, [], [], Col),
-    M = move_cursor(NewCol + length(BufTail), NewCol, Tty),
+    M = move_cursor(special_at_width(NewCol+length(BufTail), Tty), NewCol, Tty),
     {[WriteBuf, BufTail | M], {NewBuf, BufTail, NewCol}}.
 
 %%% delete characters at current position, (backwards if negative argument)
@@ -381,7 +381,7 @@ delete_chars(N, {Buf, BufTail, Col}, Tty) -> % N < 0
     NewBuf = nthtail(-N, Buf),
     NewCol = case Col + N of V when V >= 0 -> V; _ -> 0 end,
     M1 = move_cursor(Col, NewCol, Tty),
-    M2 = move_cursor(NewCol + length(BufTail) - N, NewCol, Tty),
+    M2 = move_cursor(special_at_width(NewCol+length(BufTail)-N, Tty), NewCol, Tty),
     {[M1, BufTail, lists:duplicate(-N, $ ) | M2],
      {NewBuf, BufTail, NewCol}}.
 
@@ -438,6 +438,10 @@ move_cursor(From, To, #ssh_pty{width=Width, term=Type}) ->
 	   end,
     [Tcol | Trow].
 
+%%% Caution for line "breaks"
+special_at_width(From0, #ssh_pty{width=Width}) when (From0 rem Width) == 0 -> From0 - 1;
+special_at_width(From0, _) -> From0.
+
 %% %%% write out characters
 %% %%% make sure that there is data to send
 %% %%% before calling ssh_connection:send
-- 
2.16.4

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File 0787-ssh-Fix-cli-problems-at-line-end.patch of Package erlang (Revision ac78bcc5a6f7a4d1efd770008567e9f7)

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