[Xen-devel] [PATCH 1/3 v4] ui/input: add qemu_input_qcode_to_linux

[Owen Smith <owen.smith@xxxxxxxxxx>]

Build a reverse mapping on first call that converts qcodes to
linux KEY_* identifiers.

Signed-off-by: Owen Smith <owen.smith@xxxxxxxxxx>
---
 include/ui/input.h |  1 +
 ui/input-keymap.c  | 16 ++++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/include/ui/input.h b/include/ui/input.h
index c488585..c3c1664 100644
--- a/include/ui/input.h
+++ b/include/ui/input.h
@@ -49,6 +49,7 @@ int qemu_input_key_value_to_qcode(const KeyValue *value);
 int qemu_input_key_value_to_scancode(const KeyValue *value, bool down,
                                      int *codes);
 int qemu_input_linux_to_qcode(unsigned int lnx);
+unsigned int qemu_input_qcode_to_linux(int qcode);
 
 InputEvent *qemu_input_event_new_btn(InputButton btn, bool down);
 void qemu_input_queue_btn(QemuConsole *src, InputButton btn, bool down);
diff --git a/ui/input-keymap.c b/ui/input-keymap.c
index cf979c2..5f020fc 100644
--- a/ui/input-keymap.c
+++ b/ui/input-keymap.c
@@ -300,6 +300,7 @@ static const int qcode_to_number[] = {
 };
 
 static int number_to_qcode[0x100];
+static unsigned int qcode_to_linux[Q_KEY_CODE__MAX];
 
 int qemu_input_linux_to_qcode(unsigned int lnx)
 {
@@ -307,6 +308,21 @@ int qemu_input_linux_to_qcode(unsigned int lnx)
     return linux_to_qcode[lnx];
 }
 
+unsigned int qemu_input_qcode_to_linux(int qcode)
+{
+    static int first = true;
+
+    if (first) {
+        unsigned int lnx;
+        first = false;
+        for (lnx = 0; lnx < KEY_CNT; ++lnx) {
+            qcode_to_linux[linux_to_qcode[lnx]] = lnx;
+        }
+    }
+
+    return qcode_to_linux[qcode];
+}
+
 int qemu_input_key_value_to_number(const KeyValue *value)
 {
     if (value->type == KEY_VALUE_KIND_QCODE) {
-- 
2.1.4


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