globals.h: decouple vim.h and globals.h

Allow globals.h to be included without including vim.h. Another small piece
of the puzzle of dismantling vim.h.

Moving some extra `#define`'s to globals.h is no better than having them in
vim.h. We should, in a later PR, move them to the file where they belong or
to a separate `constants.h` or something.

1 files changed, 21 insertions, 0 deletions

diff --git a/src/nvim/globals.h b/src/nvim/globals.h
index 1f402f3ef9..b3ed2f7239 100644
--- a/src/nvim/globals.h
+++ b/src/nvim/globals.h
@@ -10,15 +10,36 @@
 
 #include <stdbool.h>
 
+// EXTERN is only defined in main.c. That's where global variables are
+// actually defined and initialized.
+#ifndef EXTERN
+# define EXTERN extern
+# define INIT(x)
+#else
+# ifndef INIT
+#  define INIT(x) x
+#  define DO_INIT
+# endif
+#endif
+
 #include "nvim/ex_eval.h"
 #include "nvim/mbyte.h"
 #include "nvim/menu.h"
 #include "nvim/syntax_defs.h"
+#include "nvim/types.h"
 
 /*
  * definition of global variables
  */
 
+#define IOSIZE         (1024+1)          // file I/O and sprintf buffer size
+
+#define MAX_MCO        6                 // maximum value for 'maxcombine'
+
+# define MSG_BUF_LEN 480                 // length of buffer for small messages
+# define MSG_BUF_CLEN  (MSG_BUF_LEN / 6) // cell length (worst case: utf-8
+                                         // takes 6 bytes for one cell)
+
 /* Values for "starting" */
 #define NO_SCREEN       2       /* no screen updating yet */
 #define NO_BUFFERS      1       /* not all buffers loaded yet */