System.Data.SQLite.Sqlite3.sqlite3_get_table_cb C# (CSharp) Method

static public int sqlite3_get_table_cb( object pArg, i64 nCol, object Oargv, object Ocolv )
{
string[] argv = (string[])Oargv;
string[]colv = (string[])Ocolv;
TabResult p = (TabResult)pArg;
int need;
int i;
string z;

/* Make sure there is enough space in p.azResult to hold everything
** we need to remember from this invocation of the callback.
*/
if( p.nRow==0 && argv!=null ){
need = (int)nCol*2;
}else{
need = (int)nCol;
}
if( p.nData + need >= p.nAlloc ){
string[] azNew;
p.nAlloc = p.nAlloc*2 + need + 1;
azNew = new string[p.nAlloc];//sqlite3_realloc( p.azResult, sizeof(char*)*p.nAlloc );
if( azNew==null ) goto malloc_failed;
p.azResult = azNew;
}

/* If this is the first row, then generate an extra row containing
** the names of all columns.
*/
if( p.nRow==0 ){
p.nColumn = (int)nCol;
for(i=0; i<nCol; i++){
z = sqlite3_mprintf("%s", colv[i]);
if( z==null ) goto malloc_failed;
p.azResult[p.nData++ -1] = z;
}
}else if( p.nColumn!=nCol ){
//sqlite3_free(ref p.zErrMsg);
p.zErrMsg = sqlite3_mprintf(
"sqlite3_get_table() called with two or more incompatible queries"
);
p.rc = SQLITE_ERROR;
return 1;
}

/* Copy over the row data
*/
if( argv!=null ){
for(i=0; i<nCol; i++){
if( argv[i]==null ){
z = null;
}else{
int n = sqlite3Strlen30(argv[i])+1;
//z = sqlite3_malloc( n );
//if( z==0 ) goto malloc_failed;
z= argv[i];//memcpy(z, argv[i], n);
}
p.azResult[p.nData++ -1] = z;
}
p.nRow++;
}
return 0;

malloc_failed:
p.rc = SQLITE_NOMEM;
return 1;
}