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// ********************************************************************************************************
// Nombre del fichero: Database.cpp
// Autor: José Manuel Alonso (E.T.S.I.I.) Universidad de Sevilla
// Fecha Creación: Marzo-2010
// Fecha Última modificación: Marzo-2010
// Descripción:
// Fichero de implementación de la clase Database para funciones de manipulación
// de bases de datos sobre un Servidor Mysql
// ********************************************************************************************************
#include "Database.h"
// __________________________________________________________________________
void ErrorHandler(Herror hr, char* ErrStr)
{
sprintf(ErrStr,"Error:\n");
sprintf(ErrStr,"%sCode = %d\n",ErrStr ,hr.nError);
sprintf(ErrStr,"%sDescription = %s",ErrStr, (char*) hr.dError);
}
// __________________________________________________________________________
Database::Database()
{
m_Cnn=NULL;
sprintf(m_ErrStr,"NULL POINTER");
}
// __________________________________________________________________________
void Database::GetErrorErrStr(char* ErrStr)
{
sprintf(ErrStr,"%s",m_ErrStr);
}
// __________________________________________________________________________
void Table::GetErrorErrStr(char* ErrStr)
{
sprintf(ErrStr,"%s",m_ErrStr);
}
// __________________________________________________________________________
bool Database::Open(char* UserName, char* Pwd,char* server,char*Bd)
{
Herror hr;
m_Cnn=mysql_init(NULL);
if(m_Cnn==NULL){
hr.nError=0;
strcpy(hr.dError,"Error en la Creación del objeto MYSQL");
ErrorHandler(hr,m_ErrStr);
return(false); // Fallo de inicializaci�
}
if(!mysql_real_connect(m_Cnn, server,UserName,Pwd,Bd, MYSQL_PORT,NULL,0)){
mysql_error(m_Cnn);
hr.nError=mysql_errno(m_Cnn);
strcpy(hr.dError,mysql_error(m_Cnn));
ErrorHandler(hr,m_ErrStr);
return(false); // Fallo de conexi�
}
hr.nError=0;
strcpy(hr.dError,"Success");
ErrorHandler(hr,m_ErrStr);
return (true);
}
// __________________________________________________________________________
bool Database::Close()
{
mysql_close(m_Cnn);
return(true);
}
// __________________________________________________________________________
bool Database::Execute(char* CmdStr)
{
Herror hr;
if (mysql_query(m_Cnn,CmdStr)){ // Ejecuta la consulta
mysql_error(m_Cnn);
hr.nError=mysql_errno(m_Cnn);
strcpy(hr.dError,mysql_error(m_Cnn));
ErrorHandler(hr,m_ErrStr);
mysql_close(m_Cnn);
return(false); // Fallo de conexión
}
hr.nError=0;
strcpy(hr.dError,"Success");
ErrorHandler(hr,m_ErrStr);
return (true);
}
// __________________________________________________________________________
bool Database::Execute(char* CmdStr, Table& Tbl)
{
Herror hr;
if (mysql_query(m_Cnn,CmdStr)) { // Ejecuta la consulta
mysql_error(m_Cnn);
hr.nError=mysql_errno(m_Cnn);
strcpy(hr.dError,mysql_error(m_Cnn));
ErrorHandler(hr,m_ErrStr);
mysql_close(m_Cnn);
return(false); // Fallo de conexi�
}
hr.nError=0;
strcpy(hr.dError,"Success");
ErrorHandler(hr,m_ErrStr);
Tbl.m_Rec = mysql_store_result(m_Cnn) ; // Toma el recordset
if(Tbl.m_Rec){
Tbl.row=mysql_fetch_row(Tbl.m_Rec);
Tbl.fields = mysql_fetch_fields(Tbl.m_Rec);
Tbl.num_fields = mysql_num_fields(Tbl.m_Rec);
Tbl.numreg=mysql_num_rows(Tbl.m_Rec);
Tbl.eof=Tbl.numreg==0; // Consulta vacia
}
return (true);
}
// __________________________________________________________________________
void Database::liberaResult (Table& Tbl) {
//Free resources after mysql_store_result
mysql_free_result(Tbl.m_Rec);
}
// __________________________________________________________________________
Table::Table()
{
m_Rec=NULL;
}
// __________________________________________________________________________
bool Table::ISEOF()
{
return(eof);
}
// __________________________________________________________________________
bool Table::Get(const char* FieldName, char *FieldValue)
{
char * aux;
aux=tomadato(FieldName);
if(aux)
strcpy(FieldValue,aux);
else
strcpy(FieldValue,"");
return(true);
}
// __________________________________________________________________________
bool Table::Get(const char* FieldName,int &FieldValue)
{
char *aux;
aux=tomadato(FieldName);
if(aux)
FieldValue=atoi(aux);
else
FieldValue=0;
return(true);
}
// __________________________________________________________________________
bool Table::Get(const char* FieldName,char &FieldValue)
{
char *aux;
aux=tomadato(FieldName);
FieldValue=aux[0];
return(true);
}
// __________________________________________________________________________
char* Table::tomadato(const char* FieldName)
{
Herror hr;
unsigned int i;
for(i = 0; i < num_fields; i++){
if(strcmp((char*)fields[i].name,FieldName)==0){
sprintf(m_ErrStr,"Success");
return((char*)row[i]);
}
}
hr.nError=-1;
strcpy(hr.dError,"El nombre del campo no existe");
ErrorHandler(hr,m_ErrStr);
return(NULL); // No existe el nombre del campo en la tabla
}
// __________________________________________________________________________
bool Table::MoveNext()
{
eof=false;
row=mysql_fetch_row(m_Rec);
if(row==NULL){
if(!mysql_eof(m_Rec))
return(false); // Fallo de lectura
else
eof=true; // Fin de fichero
}
return (true);
}
// __________________________________________________________________________
bool Table::MoveFirst()
{
my_ulonglong auxnumreg;
auxnumreg=0;
mysql_data_seek(m_Rec,auxnumreg);
return (MoveNext());
}
// __________________________________________________________________________
bool Table::MoveLast()
{
my_ulonglong auxnumreg;
auxnumreg=numreg;
auxnumreg--;
if(auxnumreg<0) auxnumreg=0; // Principio de fichero
mysql_data_seek(m_Rec,auxnumreg);
return (MoveNext());
return (true);
}
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