From 2f4cb88d5c60f725323739300bb49dfa8923e7d5 Mon Sep 17 00:00:00 2001
From: Albert Cervin <albert@acervin.com>
Date: Wed, 2 Nov 2022 22:20:04 +0100
Subject: =?UTF-8?q?=F0=9F=8E=89=20And=20so=20it=20begins?=
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---
 src/keyboard.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 src/keyboard.c

(limited to 'src/keyboard.c')

diff --git a/src/keyboard.c b/src/keyboard.c
new file mode 100644
index 0000000..2cf9e8c
--- /dev/null
+++ b/src/keyboard.c
@@ -0,0 +1,56 @@
+#include "keyboard.h"
+
+#include <string.h>
+#include <unistd.h>
+
+struct keyboard keyboard_create() {
+  // TODO: should input term stuff be set here?
+  return (struct keyboard){};
+}
+
+void parse_keys(uint8_t *bytes, uint32_t nbytes, struct key *out_keys,
+                uint32_t *out_nkeys) {
+  uint32_t nkps = 0;
+  for (uint32_t bytei = 0; bytei < nbytes; ++bytei) {
+    uint8_t b = bytes[bytei];
+
+    struct key *kp = &out_keys[nkps];
+
+    if (b == 0x1b) { // meta
+      kp->mod |= Meta;
+    } else if (b >= 0x00 && b <= 0x1f) { // ctrl char
+      kp->mod |= Ctrl;
+      kp->c = b | 0x40;
+
+    } else if (b == 0x7f) { // ^?
+      kp->mod |= Ctrl;
+      kp->c = '?';
+    } else { // normal char (or part of char)
+      kp->c = b;
+    }
+
+    ++nkps;
+  }
+
+  *out_nkeys = nkps;
+}
+
+struct keyboard_update keyboard_begin_frame(struct keyboard *kbd) {
+  uint8_t bytes[32] = {0};
+  int nbytes = read(STDIN_FILENO, bytes, 32);
+
+  struct keyboard_update upd =
+      (struct keyboard_update){.keys = {0}, .nkeys = 0};
+
+  if (nbytes > 0) {
+    parse_keys(bytes, nbytes, upd.keys, &upd.nkeys);
+  }
+
+  return upd;
+}
+
+void keyboard_end_frame(struct keyboard *kbd) {}
+
+bool key_equal(struct key *key, uint8_t mod, uint8_t c) {
+  return key->c == c && key->mod == mod;
+}
-- 
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