[gdb/testsuite] Initial TERM=ansis support in tuiterm

While investigating using TERM=ansiw for freebsd, I also came across
TERM=ansis which unlike ansiw is present on both linux and freebsd.

Add initial support for TERM=ansi in tuiterm:
- handle ansis in Term::_have_bw
- add Term::_csi_x to support (well, ignore) DECREQTPARM
  (Request Terminal Parameters)

This is sufficient to make the TUI testsuite pass on x86_64-freebsd.

1 files changed, 11 insertions, 1 deletions

diff --git a/gdb/testsuite/lib/tuiterm.exp b/gdb/testsuite/lib/tuiterm.exp
index 1e18a7a..f4a8702 100644
--- a/gdb/testsuite/lib/tuiterm.exp
+++ b/gdb/testsuite/lib/tuiterm.exp
@@ -92,7 +92,9 @@ namespace eval Term {
 
     # Return 1 if tuiterm has the bw/auto_left_margin enabled.
     proc _have_bw {} {
-	return [string equal $Term::_TERM "ansiw"]
+	return [expr \
+		    [string equal $Term::_TERM "ansiw"] \
+		    || [string equal $Term::_TERM "ansis"]]
     }
 
     # Backspace.
@@ -701,6 +703,14 @@ namespace eval Term {
 	}
     }
 
+    # Request Terminal Parameters (DECREQTPARM)
+    #
+    # https://invisible-island.net/xterm/ctlseqs/ctlseqs.html
+    # https://vt100.net/docs/vt100-ug/chapter3.html
+    proc _csi_x {} {
+	# Ignore.
+    }
+
     # Insert string at the cursor location.
     proc _insert {str} {
 	_log_cur "Inserted string '$str'" {