Merge remote-tracking branch 'upstream/master'

* upstream/master: (1239 commits)
  Update ez.c
  removes planck/rev3 temporarily
  Move hand_swap_config to ez.c, removes error for infinity
  Update Makefile
  ergodox: Update algernon's keymap to v1.9
  Added VS Code dir to .gitignore
  Support the Pegasus Hoof controller.
  [Jack & Erez] Simplifies and documents TO
  add readme
  use wait_ms instead of _delay_ms
  add messenger
  init keymap
  Add example keymap
  Adding whiskey_tango_foxtrot_capslock ergodox keymap
  Unicode map framework. Allow unicode up to 0xFFFFF using separate mapping table
  CIE 1931 dim curve
  Apply the dim curve to the RGB output
  Update the Cluecard readme files
  Tune snake and knight intervals for Cluecard
  Tunable RGB light intervals
  ...

1 files changed, 60 insertions, 0 deletions

diff --git a/quantum/process_keycode/process_chording.c b/quantum/process_keycode/process_chording.c
new file mode 100644
index 0000000000..d7814629f3
--- /dev/null
+++ b/quantum/process_keycode/process_chording.c
@@ -0,0 +1,60 @@
+#include "process_chording.h"
+
+bool keys_chord(uint8_t keys[]) {
+  uint8_t keys_size = sizeof(keys)/sizeof(keys[0]);
+  bool pass = true;
+  uint8_t in = 0;
+  for (uint8_t i = 0; i < chord_key_count; i++) {
+    bool found = false;
+    for (uint8_t j = 0; j < keys_size; j++) {
+      if (chord_keys[i] == (keys[j] & 0xFF)) {
+        in++; // detects key in chord
+        found = true;
+        break;
+      }
+    }
+    if (found)
+      continue;
+    if (chord_keys[i] != 0)  {
+      pass = false; // makes sure rest are blank
+    }
+  }
+  return (pass && (in == keys_size));
+}
+
+bool process_chording(uint16_t keycode, keyrecord_t *record) {
+  if (keycode >= QK_CHORDING && keycode <= QK_CHORDING_MAX) {
+    if (record->event.pressed) {
+      if (!chording) {
+        chording = true;
+        for (uint8_t i = 0; i < CHORDING_MAX; i++)
+          chord_keys[i] = 0;
+        chord_key_count = 0;
+        chord_key_down = 0;
+      }
+      chord_keys[chord_key_count] = (keycode & 0xFF);
+      chord_key_count++;
+      chord_key_down++;
+      return false;
+    } else {
+      if (chording) {
+        chord_key_down--;
+        if (chord_key_down == 0) {
+          chording = false;
+          // Chord Dictionary
+          if (keys_chord((uint8_t[]){KC_ENTER, KC_SPACE})) {
+            register_code(KC_A);
+            unregister_code(KC_A);
+            return false;
+          }
+          for (uint8_t i = 0; i < chord_key_count; i++) {
+            register_code(chord_keys[i]);
+            unregister_code(chord_keys[i]);
+            return false;
+          }
+        }
+      }
+    }
+  }
+  return true;
+}
\ No newline at end of file