kernel: console: Introduce cons_screen features

Introduce a 'feat' field in the cons_screen structure to allow certain
console features to be turned on or off.

Signed-off-by: Ian Moffett <ian@osmora.org>

4 files changed, 57 insertions, 0 deletions

diff --git a/sys/dev/cons/cons.c b/sys/dev/cons/cons.c
index 8470a60..3eb7c33 100644
--- a/sys/dev/cons/cons.c
+++ b/sys/dev/cons/cons.c
@@ -488,7 +488,10 @@ void
 cons_init(void)
 {
     struct fbdev fbdev = fbdev_get();
+    struct console_feat *featp;
 
+    featp = &g_root_scr.feat;
+    featp->ansi_esc = 1;
     g_root_scr.ch_col = 0;
     g_root_scr.ch_row = 0;
     g_root_scr.fg = CONSOLE_FG;
diff --git a/sys/dev/cons/cons_ansi.c b/sys/dev/cons/cons_ansi.c
index fafb4ff..e00bdc9 100644
--- a/sys/dev/cons/cons_ansi.c
+++ b/sys/dev/cons/cons_ansi.c
@@ -29,6 +29,7 @@
 
 #include <sys/types.h>
 #include <sys/cdefs.h>
+#include <sys/console.h>
 #include <dev/cons/cons.h>
 #include <dev/cons/ansi.h>
 #include <string.h>
@@ -61,6 +62,8 @@ int
 ansi_feed(struct ansi_state *statep, char c)
 {
     struct cons_screen *scr = &g_root_scr;
+    struct console_feat *featp;
+
 
     /* Standard colors */
     static uint32_t colortab[] = {
@@ -70,6 +73,11 @@ ansi_feed(struct ansi_state *statep, char c)
         ANSI_CYAN, ANSI_WHITE
     };
 
+    featp = &scr->feat;
+    if (!featp->ansi_esc) {
+        return 0;
+    }
+
     /*
      * Handle the control sequence introducer
      * bytes.
diff --git a/sys/include/dev/cons/cons.h b/sys/include/dev/cons/cons.h
index 7599dd5..aa9d8e3 100644
--- a/sys/include/dev/cons/cons.h
+++ b/sys/include/dev/cons/cons.h
@@ -32,6 +32,7 @@
 
 #include <sys/types.h>
 #include <sys/spinlock.h>
+#include <sys/console.h>
 #include <dev/video/fbdev.h>
 #include <dev/cons/consvar.h>
 #include <dev/cons/ansi.h>
@@ -47,6 +48,7 @@ struct cons_char {
 struct cons_screen {
     struct fbdev fbdev;
     struct ansi_state ansi_s;
+    struct console_feat feat;   /* Features */
     uint32_t fg;
     uint32_t bg;
 
diff --git a/sys/include/sys/console.h b/sys/include/sys/console.h
new file mode 100644
index 0000000..8ab333f
--- /dev/null
+++ b/sys/include/sys/console.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _SYS_CONSOLE_H_
+#define _SYS_CONSOLE_H_
+
+#include <sys/types.h>
+
+/*
+ * Console features
+ *
+ * @ansi_esc: If 1, ANSI escape codes are enabled
+ */
+struct console_feat {
+    uint8_t ansi_esc : 1;
+};
+
+#endif  /* !_SYS_CONSOLE_H_ */