1 files changed, 130 insertions, 0 deletions
diff --git a/grub-core/kern/term.c b/grub-core/kern/term.c
new file mode 100644
index 0000000..7b35931
--- /dev/null
+++ b/grub-core/kern/term.c
@@ -0,0 +1,130 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2002,2003,2005,2007,2008,2009  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/term.h>
+#include <grub/err.h>
+#include <grub/mm.h>
+#include <grub/misc.h>
+#include <grub/env.h>
+#include <grub/time.h>
+
+struct grub_term_output *grub_term_outputs_disabled;
+struct grub_term_input *grub_term_inputs_disabled;
+struct grub_term_output *grub_term_outputs;
+struct grub_term_input *grub_term_inputs;
+
+void (*grub_term_poll_usb) (void) = NULL;
+
+/* Put a Unicode character.  */
+static void
+grub_putcode_dumb (grub_uint32_t code,
+		   struct grub_term_output *term)
+{
+  struct grub_unicode_glyph c =
+    {
+      .base = code,
+      .variant = 0,
+      .attributes = 0,
+      .ncomb = 0,
+      .combining = 0,
+      .estimated_width = 1
+    };
+
+  if (code == '\t' && term->getxy)
+    {
+      int n;
+
+      n = 8 - ((term->getxy (term) >> 8) & 7);
+      while (n--)
+	grub_putcode_dumb (' ', term);
+
+      return;
+    }
+
+  (term->putchar) (term, &c);
+  if (code == '\n')
+    grub_putcode_dumb ('\r', term);
+}
+
+static void
+grub_xputs_dumb (const char *str)
+{
+  for (; *str; str++)
+    {
+      grub_term_output_t term;
+      grub_uint32_t code = *str;
+      if (code > 0x7f)
+	code = '?';
+
+      FOR_ACTIVE_TERM_OUTPUTS(term)
+	grub_putcode_dumb (code, term);
+    }
+}
+
+void (*grub_xputs) (const char *str) = grub_xputs_dumb;
+
+static int pending_key = GRUB_TERM_NO_KEY;
+
+int
+grub_checkkey (void)
+{
+  grub_term_input_t term;
+
+  if (pending_key != GRUB_TERM_NO_KEY)
+    return pending_key;
+
+  if (grub_term_poll_usb)
+    grub_term_poll_usb ();
+
+  FOR_ACTIVE_TERM_INPUTS(term)
+  {
+    pending_key = term->getkey (term);
+    if (pending_key != GRUB_TERM_NO_KEY)
+      return pending_key;
+  }
+
+  return -1;
+}
+
+int
+grub_getkey (void)
+{
+  int ret;
+
+  grub_refresh ();
+
+  grub_checkkey ();
+  while (pending_key == GRUB_TERM_NO_KEY)
+    {
+      grub_cpu_idle ();
+      grub_checkkey ();
+    }
+  ret = pending_key;
+  pending_key = GRUB_TERM_NO_KEY;
+  return ret;
+}
+
+
+void
+grub_refresh (void)
+{
+  struct grub_term_output *term;
+
+  FOR_ACTIVE_TERM_OUTPUTS(term)
+    grub_term_refresh (term);
+}