pretty-print.c (eat_esc_sequence): Swap the foreground and background colors if...

* gcc/pretty-print.c (eat_esc_sequence): Swap the foreground and background
colors if the COMMON_LVB_REVERSE_VIDEO flag is set, and clear it thereafter,
as it only works for DBCS.

From-SVN: r263531

gcc/ChangeLog

 2018-08-13  Liu Hao <lh_mouse@126.com>
 
+	* pretty-print.c (eat_esc_sequence): Swap the foreground and
+	background colors if the COMMON_LVB_REVERSE_VIDEO flag is set,
+	and clear it thereafter, as it only works for DBCS.
+
+2018-08-13  Liu Hao <lh_mouse@126.com>
+
 	* pretty-print.c (mingw_ansi_fputs): Do not call _close() on the
 	handle returned by _get_osf_handle().
 

gcc/pretty-print.c

@@ -640,6 +640,16 @@ sgr_set_it:
 	{
 	  attrib_add |= sb.wAttributes & ~attrib_rm;
 	}
+      if (attrib_add & COMMON_LVB_REVERSE_VIDEO)
+	{
+	  /* COMMON_LVB_REVERSE_VIDEO is only effective for DBCS.
+	   * Swap foreground and background colors by hand.
+	   */
+	  attrib_add = (attrib_add & 0xFF00)
+			| ((attrib_add & 0x00F0) >> 4)
+			| ((attrib_add & 0x000F) << 4);
+	  attrib_add &= ~COMMON_LVB_REVERSE_VIDEO;
+	}
       SetConsoleTextAttribute (h, attrib_add);
       break;
     }