Start C++ rewrite.

ke_constants.h

@@ -0,0 +1,44 @@
+/*
+ * ke_constants.h
+ * 
+ * Common constants and defines for Kyle's Editor (ke)
+ * Refactored from main.c and other source files for centralized maintenance.
+ */
+
+#ifndef KE_CONSTANTS_H
+#define KE_CONSTANTS_H
+
+/* Version information */
+#ifndef KE_VERSION
+#define KE_VERSION		"ke dev build"
+#endif
+
+/* Terminal escape sequences */
+#define ESCSEQ			"\x1b["
+
+/* Keyboard and control key macros */
+#define CTRL_KEY(key)		((key)&0x1f)
+
+/* Display and rendering constants */
+#define TAB_STOP		8
+#define MSG_TIMEO		3
+
+/* Memory management constants */
+#define INITIAL_CAPACITY	64
+
+/* Keyboard input modes */
+#define MODE_NORMAL		0
+#define MODE_KCOMMAND		1
+#define MODE_ESCAPE		2
+
+/* Kill ring operations */
+#define KILLRING_NO_OP		0	/* don't touch the killring */
+#define KILLRING_APPEND		1	/* append deleted chars */
+#define KILLRING_PREPEND	2	/* prepend deleted chars */
+#define KILLING_SET		3	/* set killring to deleted char */
+#define KILLRING_FLUSH		4	/* clear the killring */
+
+/* Legacy C struct initializers (for compatibility with main.c) */
+#define ABUF_INIT		{NULL, 0, 0}
+
+#endif /* KE_CONSTANTS_H */