Add an option with a color type.

Colors can be specified as "none" for terminal's default color, as a name of
one of the eight standard colors of ISO/IEC 6429 "black", "red", "green", etc.,
as an RGB hexadecimal tripplet #RRGGBB for 24-bit TrueColor, or as an
integer from 0 to 255.  Integers 0 to 7 are the synonyms for the standard
colors.  Integers 8-15 are used for the so-called bright colors from the
aixterm extended 16-color palette.  Integers 16-255 are the indexes into xterm
extended 256-color palette (usually 6x6x6 cube plus gray ramp).  In
general, 256-color palette is terminal dependent and sometimes can be
changed with OSC 4 sequences, e.g. "\033]4;1;rgb:00/FF/00\033\\".

It is the responsibility of the user to verify that the terminal supports
the specified colors.

PATCH v5 changes: documentation fixed.
PATCH v6 changes: documentation fixed.
PATCH v7 changes: rebase onto master and fixes after review.
PATCH v8 changes: fixes after review.

1 files changed, 6 insertions, 0 deletions

diff --git a/gdb/cli/cli-cmds.c b/gdb/cli/cli-cmds.c
index 0140c71..69a7e8b 100644
--- a/gdb/cli/cli-cmds.c
+++ b/gdb/cli/cli-cmds.c
@@ -2398,6 +2398,11 @@ value_from_setting (const setting &var, struct gdbarch *gdbarch)
 
 	return current_language->value_string (gdbarch, value, len);
       }
+    case var_color:
+      {
+	std::string s = var.get<ui_file_style::color> ().to_string ();
+	return current_language->value_string (gdbarch, s.c_str (), s.size ());
+      }
     default:
       gdb_assert_not_reached ("bad var_type");
     }
@@ -2445,6 +2450,7 @@ str_value_from_setting (const setting &var, struct gdbarch *gdbarch)
     case var_pinteger:
     case var_boolean:
     case var_auto_boolean:
+    case var_color:
       {
 	std::string cmd_val = get_setshow_command_value_string (var);