draft: subrange apis

cpp/example/test.c

@@ -129,4 +129,10 @@ int main(){
    free(b3.data);
    free(b4.data);
    free_result(&res1);
+
+   void* subrange = subrange_new(st1, 0 , UINT64_MAX);
+   if (subrange == NULL){
+      perror("failed to init subrange");
+   }
+   printf("subrange init successful");
 }

cpp/negentropy_wrapper.c

@@ -4,6 +4,7 @@
 #include "negentropy.h"
 #include "negentropy/storage/BTreeMem.h"
 #include "negentropy_wrapper.h"
+#include "negentropy/storage/SubRange.h"
 
 //This is a C-wrapper for the C++ library that helps in integrating negentropy with nim code.
 //TODO: Do error handling by catching exceptions
@@ -44,6 +45,22 @@ int storage_size(void* storage){
     return lmdbStorage->size();
 }
 
+void* subrange_new(void* storage, uint64_t startTimeStamp, uint64_t endTimeStamp){
+    negentropy::storage::BTreeMem* st = reinterpret_cast<negentropy::storage::BTreeMem*>(storage);
+    negentropy::storage::SubRange* subRange = NULL;
+    try {
+    subRange = new negentropy::storage::SubRange(*st, negentropy::Bound(startTimeStamp), negentropy::Bound(endTimeStamp));
+    } catch (negentropy::err e){
+        return NULL;
+    }
+    return subRange;
+}
+
+void subrange_delete(void* range){
+    negentropy::storage::SubRange* subRange = reinterpret_cast<negentropy::storage::SubRange*>(range);
+    delete subRange;
+}
+
 void negentropy_delete(void* negentropy){
     Negentropy<negentropy::storage::BTreeMem>* ngn_inst = reinterpret_cast<Negentropy<negentropy::storage::BTreeMem>*>(negentropy);
     delete ngn_inst;

cpp/negentropy_wrapper.h

@@ -31,6 +31,10 @@ EXTERNC void storage_delete(void* storage);
 
 EXTERNC int storage_size(void* storage);
 
+EXTERNC void* subrange_new(void* storage, uint64_t startTimeStamp, uint64_t endTimeStamp);
+
+EXTERNC void subrange_delete(void* range);
+
 EXTERNC void* negentropy_new(void* storage, uint64_t frameSizeLimit);
 
 EXTERNC void negentropy_delete(void* negentropy);