@@ -24,8 +24,10 @@

 #include "sha3/sha3.h"

 //#define CHUNKSIZE 32768

+//#define CHUNKSIZE 4096

+#define CHUNKSIZE 1024

 //#define CHUNKSIZE 160

-#define CHUNKSIZE 16

+//#define CHUNKSIZE 16

 #define UNDOBLOCK 1024

 #define ADDNBLOCK 1024

 #define UNDOGROWSIZE (256*1024)

@@ -846,8 +848,10 @@ redata_undo_movelast(redata_t *redata, undostack_t *from, undostack_t *to)

                 return(-1); /* insuf. mem. */

         undoto->posorig=undofrom->posorig;

         undoto->posdest=undofrom->posdest;

+#ifdef REDATA_HASHUNDO

         memcpy(undoto->prehash,undofrom->prehash,sizeof(undoto->prehash));

         memcpy(undoto->posthash,undofrom->posthash,sizeof(undoto->posthash));

+#endif

         redata_undo_removelast(redata, from);

         return(0);

 }

@@ -945,7 +949,9 @@ redata_op_add(redata_t *redata, long insertpos, char *buf, long buflen, undostac

         if(fromhere!=&(redata->undostack)) {

                 if((undo=redata_undo_newfrombuf(redata,&(redata->undostack),'A',buf,buflen))==NULL)

                         return(-1); /* couldn't create undo struct */

+#ifdef REDATA_HASHUNDO

                 redata_hash(redata,undo->prehash);

+#endif

         } else {

                 undo=NULL;

         }

@@ -1005,7 +1011,9 @@ redata_op_add(redata_t *redata, long insertpos, char *buf, long buflen, undostac

         if(undo!=NULL) {

                 /* new or from redo stack */

                 undo->posorig=undo->posdest=insertpos;

+#ifdef REDATA_HASHUNDO

                 redata_hash(redata,undo->posthash);

+#endif

                 if(fromhere==&(redata->redostack))

                         redata_undo_removelast(redata,&(redata->redostack));

                 else

@@ -1067,7 +1075,9 @@ redata_op_del(redata_t *redata, long delpos, long size, undostack_t *fromhere)

         if(fromhere!=&(redata->undostack)) {

                 if((undo=redata_undo_newfromchunks(redata,&(redata->undostack),'D',delpos,size))==NULL)

                         return(-1); /* couldn't create undo struct */

+#ifdef REDATA_HASHUNDO

                 redata_hash(redata,undo->prehash);

+#endif

         } else {

                 undo=NULL;

         }

@@ -1091,7 +1101,9 @@ redata_op_del(redata_t *redata, long delpos, long size, undostack_t *fromhere)

         if(undo!=NULL) {

                 /* new or from redo stack */

                 undo->posorig=undo->posdest=delpos;

+#ifdef REDATA_HASHUNDO

                 redata_hash(redata,undo->posthash);

+#endif

                 if(fromhere==&(redata->redostack))

                         redata_undo_removelast(redata,&(redata->redostack));

                 else

@@ -1135,7 +1147,9 @@ redata_op_move(redata_t *redata, long posorig, long size, long posdest, undostac

                         return(-1); /* couldn't create undo struct */

                 /* inactivate the undo so we are able to use return(-1) without removing it */

                 redata_undo_inactivatelast(redata,&(redata->undostack));

+#ifdef REDATA_HASHUNDO

                 redata_hash(redata,undo->prehash);

+#endif

         } else {

                 undo=NULL;

         }

@@ -1226,7 +1240,9 @@ redata_op_move(redata_t *redata, long posorig, long size, long posdest, undostac

                 /* new or from redo stack */

                 undo->posorig=posorig;

                 undo->posdest=posdest;

+#ifdef REDATA_HASHUNDO

                 redata_hash(redata,undo->posthash);

+#endif

                 if(fromhere==&(redata->redostack))

                         redata_undo_removelast(redata,&(redata->redostack));

                 else

@@ -47,9 +47,11 @@ typedef struct undo_t {

         long len;

         long posorig;

         long posdest;

+        int hint_groupedwithnext;

+#ifdef REDATA_HASHUNDO

         char prehash[129];

         char posthash[129];

-        int hint_groupedwithnext;

+#endif

 } undo_t;

 typedef struct undostack_t {