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added: TextStream a class similar to std::ostringstream

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but with a Clear() method
       the dynamic allocated buffer can be easily reused
added: DbTextStream a special version of a stream
       used to create a database string query
       everything is escaped by default
added: DbBase a base class with some basic methods for communicating
       with the database
added: DbConn a class for managing connection to the database
changed: some refactoring in Db class       



git-svn-id: svn://ttmath.org/publicrep/winix/trunk@655 e52654a7-88a9-db11-a3e9-0013d4bc506e
This commit is contained in:
Tomasz Sowa
2010-09-18 00:51:12 +00:00
parent 8b1db3304f
commit a589e5a090
52 changed files with 3261 additions and 1913 deletions
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75
db/dbbase.h Executable file
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@@ -0,0 +1,75 @@
/*
* This file is a part of Winix
* and is not publicly distributed
*
* Copyright (c) 2010, Tomasz Sowa
* All rights reserved.
*
*/
#ifndef headerfile_winix_db_dbbase
#define headerfile_winix_db_dbbase
#include "dbconn.h"
#include "dbtextstream.h"
class DbBase
{
public:
DbBase();
void SetConn(DbConn * conn);
void SetConn(DbConn & conn);
DbConn * GetConn();
void LogQueries(bool log_q);
PGresult * AssertQuery(const char * query);
PGresult * AssertQuery(const std::string & query);
PGresult * AssertQuery(const DbTextStream & query);
void AssertResult(PGresult * r, ExecStatusType t);
static int AssertColumn(PGresult * r, const char * column_name);
static const char * AssertValue(PGresult * r, int row, int col);
static long AssertValueLong(PGresult * r, int row, int col);
static int AssertValueInt(PGresult * r, int row, int col);
static unsigned long AssertValueULong(PGresult * r, int row, int col);
static unsigned int AssertValueUInt(PGresult * r, int row, int col);
void ClearResult(PGresult * r);
long AssertCurrval(const char * table);
bool IsNull(PGresult * r, int row, int col);
int Rows(PGresult * r);
int Cols(PGresult * r);
long AffectedRows(PGresult * r);
static tm ConvertTime(const char * str);
static const char * ConvertTime(const tm & t); // warning: it uses its own static buffer
protected:
// a helper method for escaping strings
template<class RawType>
DbTextStream::RawText<RawType> R(const RawType & par)
{
return DbTextStream::RawText<RawType>(par);
}
DbConn * db_conn;
bool log_queries;
private:
DbTextStream bquery;
};
#endif