function setSize in CycleStorage and few changes in JrnTest to test it

Utilities/JrnTests/JrnTest.cc

@@ -211,7 +211,7 @@ bool reOpen()
 	int i,k=0;
 	char *str = new char[30];
 	printf("the same after reopen:\n");
-	if(!j.open("big_file.test",30,32000,seek))
+	if(!j.open("big_file.test",30,33000,seek))
 	{
 		printf("Reopen file error\n");
 		delete str;
@@ -237,7 +237,7 @@ bool testJournal1(void)
 	int i,k=0;
 	char *str = new char[30];
 	printf("journal test 1\n");
-	for(i=1;i<33000;i++)
+	for(i=1;i<64001;i++)
 	{
 		sprintf(str,"%d",i);
 		j.addRow(str);
@@ -257,7 +257,7 @@ bool testJournal1(void)
 		return false;
 	}
 	k = 0;
-
+	j.setSize(33000);
 	TableBlockStorage t("big_file.test", 4, 40, 100, 5,28,0);
 	printf("test of 2 classes working in 1 file together\n");
 	char *val = new char[40];
@@ -294,7 +294,7 @@ bool testJournal1(void)
 	k = 0;
 
 	printf("first 20 after adding 10 elements\n");
-	for(i=10001;i<10011;i++)
+	for(i=10000001;i<10000011;i++)
 	{
 		sprintf(str,"%d",i);
 		j.addRow(str);
@@ -319,6 +319,20 @@ bool testJournal1(void)
 
 	if(!reOpen()) return false;
 
+	j.setSize(32000);
+	for(i=0;i<32000;i++)
+	{
+		if(j.readRow(i,str))
+		{
+			printf("%s\n",str);
+			k++;
+		}
+	}
+	if( k>0 )
+	{
+		delete str;
+		return false;
+	}
 	delete str;
 	return true;
 }

include/Storages.h

@@ -183,6 +183,9 @@ class CycleStorage
 		/*!  -    /  (  ) */
 		int getIter(void);
 
+		/*!    (   ) */
+		bool setSize(int count);
+		
 		inline int getByteSize() { return (size*full_size + sizeof(CycleStorageAttr)); }
 		inline int getSize(){ return size; }
 		inline int getInfSize(){ return inf_size; }

src/Various/CycleStorage.cc

@@ -365,7 +365,7 @@ void* CycleStorage::readRow(int num, void* str)
 	int j=(head+num)%size;
 	if((file==NULL)||(num>=size)) return 0;
 
-	if((head!=tail+1)&&(num>tail)) return 0;
+	if((head!=tail+1)&&(num>tail)&&(head!=tail)) return 0;
 
 	CycleStorageElem *jrn = (CycleStorageElem*)new char[full_size];
 	fseek(file,seekpos+j*full_size,0);
@@ -385,3 +385,70 @@ int CycleStorage::getIter()
 {
 	return iter;
 }
+
+/*!     .   ,    .   
+,  ,    .    , . .  
+,      */
+
+bool CycleStorage::setSize(int count)
+{
+	if( file==NULL ) return false;
+
+	if( count==size ) return true;
+
+	fseek(file,seekpos-sizeof(CycleStorageAttr),0);
+
+	/*!    */
+	CycleStorageAttr csa;
+	csa.inf_size=inf_size;
+	csa.size=count;
+	csa.seekpos=seekpos-sizeof(CycleStorageAttr);
+	fwrite(&csa,sizeof(CycleStorageAttr),1,file);
+	fflush(file);
+
+	if(count<size)
+	{
+		size=count;
+		return delAllRows();
+	}
+
+	int num = count - size;
+	size = count;
+	CycleStorageElem *jrn = (CycleStorageElem*)new char[full_size];
+
+	if(( head==tail+1 ) || (( tail==size-num-1 ) && ( head==0 )))
+	{
+		if( head<size-num-1 )
+			fseek(file, seekpos + (size-num-1)*full_size, 0);
+		else
+			fseek(file, seekpos, 0);
+		fread(jrn, full_size, 1, file);
+		if(( jrn->status==2 ) || (jrn->status==3 ))
+			jrn->status = ( head<size-num-1 ) ? 3 : 5;
+		else if(( jrn->status==4 ) || (jrn->status==5 ))
+			jrn->status = ( head<size-num-1 ) ? 5 : 3;
+		else
+		{
+			delete[] jrn;
+			return false;
+		}
+		for( int i=num; i>0; i-- )
+		{
+			filewrite(jrn, size-i, false);
+		}
+		fflush(file);
+		if( head==0 )
+			tail = size-1;
+	}
+	else
+	{
+		jrn->status=0;
+		for( int i=num; i>0; i-- )
+			filewrite(jrn, size-i, false);
+		fflush(file);
+	}
+
+	delete[] jrn;
+	return true;
+}
+