Included patch for persistent undo. Lots of changes and added test.
diff --git a/src/proto/memline.pro b/src/proto/memline.pro
index de75a7d..4d50671 100644
--- a/src/proto/memline.pro
+++ b/src/proto/memline.pro
@@ -25,6 +25,7 @@
void ml_setmarked __ARGS((linenr_T lnum));
linenr_T ml_firstmarked __ARGS((void));
void ml_clearmarked __ARGS((void));
+int resolve_symlink __ARGS((char_u *fname, char_u *buf));
char_u *makeswapname __ARGS((char_u *fname, char_u *ffname, buf_T *buf, char_u *dir_name));
char_u *get_file_in_dir __ARGS((char_u *fname, char_u *dname));
void ml_setflags __ARGS((buf_T *buf));
diff --git a/src/proto/sha256.pro b/src/proto/sha256.pro
index a6d6be7..e9a3d3c 100644
--- a/src/proto/sha256.pro
+++ b/src/proto/sha256.pro
@@ -1,4 +1,7 @@
/* sha256.c */
+void sha256_start __ARGS((context_sha256_T *ctx));
+void sha256_update __ARGS((context_sha256_T *ctx, char_u *input, uint32_t length));
+void sha256_finish __ARGS((context_sha256_T *ctx, char_u digest[32]));
char_u *sha256_key __ARGS((char_u *buf));
int sha256_self_test __ARGS((void));
void sha2_seed __ARGS((char_u header[], int header_len));
diff --git a/src/proto/spell.pro b/src/proto/spell.pro
index f497dc6..8ab544d 100644
--- a/src/proto/spell.pro
+++ b/src/proto/spell.pro
@@ -2,11 +2,14 @@
int spell_check __ARGS((win_T *wp, char_u *ptr, hlf_T *attrp, int *capcol, int docount));
int spell_move_to __ARGS((win_T *wp, int dir, int allwords, int curline, hlf_T *attrp));
void spell_cat_line __ARGS((char_u *buf, char_u *line, int maxlen));
+int get2c __ARGS((FILE *fd));
+int get3c __ARGS((FILE *fd));
+int get4c __ARGS((FILE *fd));
char_u *did_set_spelllang __ARGS((buf_T *buf));
void spell_free_all __ARGS((void));
void spell_reload __ARGS((void));
int spell_check_msm __ARGS((void));
-void put_bytes __ARGS((FILE *fd, long_u nr, int len));
+int put_bytes __ARGS((FILE *fd, long_u nr, int len));
void ex_mkspell __ARGS((exarg_T *eap));
void ex_spell __ARGS((exarg_T *eap));
void spell_add_word __ARGS((char_u *word, int len, int bad, int idx, int undo));
diff --git a/src/proto/undo.pro b/src/proto/undo.pro
index e712f03..e5f28be 100644
--- a/src/proto/undo.pro
+++ b/src/proto/undo.pro
@@ -5,6 +5,9 @@
int u_inssub __ARGS((linenr_T lnum));
int u_savedel __ARGS((linenr_T lnum, long nlines));
int undo_allowed __ARGS((void));
+void u_compute_hash __ARGS((char_u *hash));
+void u_read_undo __ARGS((char_u *name, char_u *hash));
+void u_write_undo __ARGS((char_u *name, int forceit, buf_T *buf, char_u *hash));
void u_undo __ARGS((int count));
void u_redo __ARGS((int count));
void undo_time __ARGS((long step, int sec, int absolute));