class;;;;;DBMysql{
DBMysql(const DBMysql&);
DBMysql&operator=(const DBMysql&);
MYSQL;;;;;*;;;;;mysqlPtr_;
uint32_t;;;;;errno_;
protected:
friend;;;;;class;;;;;DBSTMT;
MYSQL_STMT*;;;;;_createSTMT(){
MYSQL_STMT;;;;;*ret=mysql_stmt_init(mysqlPtr_);
if(ret)
return;;;;;ret;
errno_=mysql_errno(mysqlPtr_);
throw;;;;;mysql_error(mysqlPtr_);
}
public:
const;;;;;char*;;;;;strerr(){
return;;;;;mysql_error(mysqlPtr_);
}
DBMysql():mysqlPtr_(NULL){
mysqlPtr_=mysql_init(NULL);
if(NULL== mysqlPtr_)
throw;;;;;"Mysql :outof memory";
}
void;;;;;open(const;;;;;mysql_parm& parm){
if(!mysql_real_connect(mysqlPtr_,
parm.host.c_str(),
parm.user.c_str(),
parm.password.c_str(),
parm.database.c_str(),
0,
parm.unixsock.c_str(),
0;;;;;))
{
errno_=mysql_errno(mysqlPtr_);
throw(mysql_error(mysqlPtr_));
}
}
void;;;;;close(){
if(mysqlPtr_)
{
mysql_close(mysqlPtr_);
mysqlPtr_=NULL;
}
}
};
DBSTMT::DBSTMT(pcsz_t;;;;;query,DBMysql& mysql):stmt_(NULL){
stmt_=mysql._createSTMT();
if(!stmt_)
throw;;;;;mysql.strerr();
if( mysql_stmt_prepare(stmt_,query,strlen(query)) )
{
//const char*;;;;;err=
throw;;;;;mysql_stmt_error(stmt_);
}
}
#define;;;;;DECL_BIND(h,n)
class bind_##h:public;;;;;h{
typedef;;;;;h;;;;;parent;
MYSQL_BIND;;;;;_bind[n];
my_bool;;;;;_is_null[n];
unsigned;;;;;long;;;;;_length[n];
public:
bind_##h(){
int;;;;;i=0;
bzero(_bind,sizeof(_bind));
#define;;;;;BIND_BIN(x,l)
_bind[i].buffer_type= MYSQL_TYPE_STRING;
_bind[i].buffer= (char *)&(parent::x);
_bind[i].buffer_length= l;
_bind[i].is_null= _is_null+i;
_bind[i].length= _length+i;
++i;
#define;;;;;BIND_INT(x)
_bind[i].buffer_type= MYSQL_TYPE_LONG;
_bind[i].buffer= (char *)&(parent::x);
_bind[i].buffer_length= 0;
_bind[i].is_null= _is_null+i;
_bind[i].length= _length+i;
++i;
#define;;;;;END_BIND(h);;;;;}
operator;;;;;MYSQL_BIND*(){
return;;;;;_bind;
}
};
使用方法;
例如想查询的内容具有以下结构
struct account{
char;;;;;user[36];
byte;;;;;password[16];
uint32_t;;;;;status;
uint32_t;;;;;id;
};
//声明查询bind 结构account,参数4个
DECL_BIND(account,4)
BIND_BIN(user,32)
BIND_BIN(password,16)
BIND_INT(status)
BIND_INT(id)
END_BIND(account)
int main(){
try{
DBMysql;;;;;mysql;
mysql_parm;;;;;parm;
parm.host="localhost";
parm.user="root";
parm.password="test";
parm.unixsock="/var/lib/mysql/mysql.sock";
parm.database="testdb";
mysql.open(parm);//打开数据库
DBSTMT;;;;;
smt("select user,password,status,id from account",mysql);
//生成一个查询语法
DBSTMT;;;;;;;
smt1("insert into account(user,password,status) value(?,?,?)",mysql);
//另外一个
//
bind_account;;;;;acc;
smt.execute(acc);//执行查询,并bind返回结果到account结构;;;;;
while(smt.fetch()){
printf("%s %d %dn",acc.user,acc.status,acc.id);
};
smt1.bind(acc);//bind查询参数
smt1.execute();//执行
}catch(const char* err){
printf("error:%sn",err);
}
}