viminfo: First version of ShaDa file dumping

What works:

1. ShaDa file dumping: header, registers, jump list, history, search patterns,
   substitute strings, variables.
2. ShaDa file reading: registers, global marks, variables.

Most was not tested.

TODO:

1. Merging.
2. Reading history, local marks, jump and buffer lists.
3. Documentation update.
4. Converting some data from &encoding.
5. Safer variant of dumping viminfo (dump to temporary file then rename).
6. Removing old viminfo code (currently masked with `#if 0` in a ShaDa file for
   reference).

1 files changed, 6 insertions, 5 deletions

diff --git a/src/nvim/ex_docmd.c b/src/nvim/ex_docmd.c
index f7162896ff..c45e641706 100644
--- a/src/nvim/ex_docmd.c
+++ b/src/nvim/ex_docmd.c
@@ -75,6 +75,7 @@
 #include "nvim/mouse.h"
 #include "nvim/event/rstream.h"
 #include "nvim/event/wstream.h"
+#include "nvim/shada.h"
 
 static int quitmore = 0;
 static int ex_pressedreturn = FALSE;
@@ -9149,11 +9150,11 @@ static void ex_viminfo(exarg_T *eap)
   if (*p_viminfo == NUL)
     p_viminfo = (char_u *)"'100";
   if (eap->cmdidx == CMD_rviminfo) {
-    if (read_viminfo(eap->arg, VIF_WANT_INFO | VIF_WANT_MARKS
-            | (eap->forceit ? VIF_FORCEIT : 0)) == FAIL)
-      EMSG(_("E195: Cannot open viminfo file for reading"));
-  } else
-    write_viminfo(eap->arg, eap->forceit);
+    if (shada_read_everything((char *) eap->arg, eap->forceit) == FAIL)
+      EMSG(_("E195: Cannot open ShaDa file for reading"));
+  } else {
+    shada_write_file((char *) eap->arg, eap->forceit);
+  }
   p_viminfo = save_viminfo;
 }