Major codebase cleanup and overhaul.

+ editor removes per-buffer fields.
+ switching from internal use of 'int' to 'size_t'.
+ deleting old code
+ double checking relevancy of comments. A lot has changed in
  5 years, even more so in the past week.
+ fixing a few vestigal memory errors from the overhaul.
+ fixing search behavior

editor.h

@@ -1,5 +1,5 @@
-#ifndef EDITOR_H
-#define EDITOR_H
+#ifndef KE_EDITOR_H
+#define KE_EDITOR_H
 
 #include <termios.h>
 #include <time.h>
@@ -9,32 +9,19 @@
 #include "buffer.h"
 
 
-/* TODO(kyle): remove the "per-buffer" fields completely from the editor. */
-
 struct editor {
-	int		  rows, cols;
-	int		  curx, cury;		/* per-buffer */
-	int		  rx;			/* per-buffer */
+	size_t		  rows, cols;
 	int		  mode;
-	int		  nrows;		/* per-buffer */
-	int		  rowoffs, coloffs;	/* per-buffer */
-	abuf		 *row;			/* per-buffer */
 	abuf		 *killring;
 	int		  kill;			/* KILL CHAIN (\m/) */
 	int		  no_kill;		/* don't kill in delete_row */
-	char		 *filename;		/* per-buffer */
-	int		  dirty;		/* per-buffer */
 	int		  dirtyex;
 	char		  msg[80];
-	int		  mark_set;		/* per-buffer */
-	int		  mark_curx, mark_cury;	/* per-buffer */
 	int		  uarg, ucount;		/* C-u support */
 	time_t		  msgtm;
-
-	/* Multi-buffer support */
 	struct buffer	**buffers;  /* array of buffers */
-	int		  bufcount; /* number of buffers */
-	int		  curbuf;   /* current buffer index */
+	size_t		  bufcount; /* number of buffers */
+	size_t		  curbuf;   /* current buffer index */
 	size_t		  bufcap;   /* current buffer capacity */
 };
 
@@ -45,4 +32,4 @@ void			 init_editor(void);
 void			 reset_editor(void);
 
 
-#endif /* EDITOR_H */
+#endif /* KE_EDITOR_H */