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Timelines: family | ancestors | BOGUS
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SHA3-256:e0025ebfb414c2d74c8257eea28a3d4fc59d8383eda340a749be76a657a36a54
User & Date: tangent 2018-09-26 02:33:11
Context
2018-09-26
02:33
Not needed Closed-Leaf check-in: e0025ebfb4 user: tangent tags: BOGUS
02:28
Better explanation of the "bootstrap bat" option in HACKERS.md. BAD CHECKIN. check-in: cf53e4ee34 user: tangent tags: BOGUS
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#ifndef __result1_hh__
#define __result1_hh__
#ifdef __WIN32__
#include <Windows32/Base.h>
#include <Windows32/Defines.h>
#include <Windows32/Structures.h>
#include <winsock.h>
#define errno WSAGetLastError()
#endif
#include <map.h>
#include <set.h>
#include <mysql.h>
#include <string>
#include "define_short"
#include "field_names1.hh"
#include "row1.hh"
#include "resiter1.hh"
#include "tracker.h"
#include "field_types1.hh"
#include "fields1.hh"

#include "connection0.hh"

//:
class ResUse : public MysqlChild {
  friend Connection;
protected:
  Connection            *mysql;
  mutable MYSQL_RES     *mysql_res;
  bool                  throw_exceptions;
  mutable FieldNames    *_names;
  mutable FieldTypes    *_types;
  Fields                _fields;
  string                _table;       

  static pointer_tracker<MYSQL_RES, ResUse> others;

  void copy(const ResUse& other); 
public:
  ResUse () : mysql(0), mysql_res(0), throw_exceptions(false), _names(NULL), _types(NULL), _fields(this) {}
  ResUse (MYSQL_RES *result, Connection *m = NULL, bool te = false);
  ResUse (const ResUse &other) {copy(other);}
  inline ResUse& operator = (const ResUse &other);
  MYSQL_RES *mysql_result (void) {return mysql_res;}
  /* raw mysql c api functions */
  Row fetch_row()
    {return Row(mysql_fetch_row(mysql_res), this, throw_exceptions);}
  //: raw c api function
  bool          eof () const {return mysql_eof(mysql_res);}
  //: raw c api function
  unsigned int fetch_lengths () const {return *mysql_fetch_lengths(mysql_res);}
  //: raw c api function
  void         free_result() {mysql_free_result(mysql_res);}
  //: raw c api function

  /* raw mysql c api fields functions */
  Field&       fetch_field () const   {return *mysql_fetch_field(mysql_res);}
  //: raw c api field function
  void         field_seek (int field) {mysql_field_seek (mysql_res, field);}
  //: raw c api field function
  int          num_fields() const {return mysql_num_fields(mysql_res);}
  //: raw c api field function

  ~ResUse (); 

  void parent_leaving() {mysql = NULL;}
  
  void purge(MYSQL_RES *r)
    { free_result(); delete _names; delete _types; _names=0; _types=0; }
  
  operator bool() const {if (mysql_res) return true; return false;} //:
  unsigned int columns() const {return num_fields();} //:

  string& table() {return _table;}
  //: table name
  const string& table() const {return _table;}
  //: table name

  /* methods for working with field names */
  inline int               field_num(const string&) const;
  //: Returns the offset of the filed which equals str.
  inline string&           field_name(int);
  //: Returns the field with an offset of i.
  inline const string&     field_name(int) const;
  //: Returns the field with an offset of i.
  inline FieldNames&       field_names();
  //: Returns a reference to the underlying FieldNames class.
  inline const FieldNames& field_names() const;
  //: Returns a const reference to the underlaying FieldNames class.
  inline void              reset_field_names();
  //: Resets the field names to there original values.

  /* methods for working with field types */
  inline mysql_type_info&  field_type(int i);
  //: Returns a reference to the  mysql field type for the field with an offset of i.
  inline const mysql_type_info& field_type(int) const;
  //: Returns a const reference to the  mysql field type for the field with an offset of i.
  inline FieldTypes&       field_types();
  //: Returns a reference to the underlying FieldTypes
  inline const FieldTypes& field_types() const;
  //: Returns a const reference to the underlying FieldTypes
  inline void              reset_field_types();
  //: Resets the field_types to their original values.

  /* short names for the above methods */
  inline int               names(const string& s) const;
  //: Returns the offset of the filed which equals str.
  inline string&           names(int i);
  //: Returns the field with an offset of i.
  inline const string&     names(int i) const;
  //: Returns the field with an offset of i.
  inline FieldNames&       names();
  //: Returns a reference to the underlying FieldNames class.
  inline const FieldNames& names() const;
  //: Returns a const reference to the underlying FieldNames class.
  inline void              reset_names();
  //: Resets the field names to their original values.

  inline mysql_type_info&  types(int i);
  //: Returns a reference to the  mysql field type for the field with an offset of i.
  inline const mysql_type_info& types(int i) const;
  //: Returns a const reference to the mysql field type for the field with an offset of i.
  inline FieldTypes&       types();
  //: Returns a reference to the underlying FieldTypes
  inline const FieldTypes& types() const;
  //: Returns a const reference to the underlying FieldTypes
  inline void              reset_types();
  //: Resets the field_types to their original values.
  
  /* methods for working with field info */
  const Fields&     fields() const {return _fields;}
  //: returns a reference to the underling Fields structure.
  const Field&      fields(unsigned int i) const {return _fields[i];}
  //: returns a reference to the the mysql field info for a field with an offset of i.

  bool     operator == (const ResUse &other) const
    {return mysql_res == other.mysql_res;}
  //:
  bool     operator != (const ResUse &other) const
    {return mysql_res != other.mysql_res;}
  //:
};

//: This class handles the result set. 
// It is also a Random Access Container that is not LessThanComparable
// and not Assignable. Being a Random Access Container it can
// return a Random Access Iterator or a reverse Random Access Iterator
// yet.
//
// See MutableRes for a result set that can be modified.
class Result : public ResUse, 
	       public const_subscript_container<Result,Row,const Row>
{
  friend Connection;
public:
  Result () {} //:
  Result (MYSQL_RES *result, bool te = false) 
    : ResUse(result, NULL, te) {mysql = NULL;} //:
  Result (const Result &other) : ResUse(other) {mysql = NULL;} //:
  
  // raw mysql c api functions
  const Row    fetch_row() const
    {return Row(mysql_fetch_row(mysql_res), this, throw_exceptions);}  
  //: Raw c api function
  int          num_rows() const {return mysql_num_rows(mysql_res);}
  //: Raw c api function
  void         data_seek (uint offset) const 
    {mysql_data_seek(mysql_res, offset);}
  //: Raw c api function

  size_type size() const {return num_rows();}
  //: Returns the number of columns.
  size_type rows() const {return num_rows();}
  //: Returns the number of rows.
  const Row operator [] (size_type i) const {data_seek(i); return fetch_row();}
  //: Returns the row with an offset of i.
};

class MutabelRes;

//: This class handles the result set. 
// It is also a Random Access Container that is not LessThanComparable
// but is Assignable. Being a Random Access Container it can
// return a Random Access Iterator or a reverse Random Access Iterator
// yet.
//
class MutableRes : public vector<MutableRow<MutableRes> > {
private:
  size_type  _columns;
  FieldNames _names;
  void populate(ResUse res);

  typedef vector<MutableRow<MutableRes> >  parent;
public:
  MutableRes() {}  //:
  MutableRes(ResUse res) : _names(&res) {populate(res);} //:
  MutableRes(size_type i) : _columns(i), _names (i) {} 
  //: Creates a new mutable result set with i columns.

  MutableRes& operator = (ResUse res) {
    _names=&res; populate(res); return *this;
  } //: 
  MutableRes& operator = (size_type i) {
    _columns = i; _names = i; return *this;
  } //:

  size_type rows() const {return size();}
  //: Returns the number of rows.
  size_type columns() const {return _columns;}
  //: Returns the number of columns.

  /* methodes for inserting elements as the standart insert functions
     won't work that well as MutableRow needs to be constructed in a
     special way */

  iterator insert(iterator pos) {return parent::insert(pos, value_type(this));} 
  void insert(iterator pos, size_type n) {parent::insert(pos, n, value_type(this));}
  void push_back() {parent::push_back(value_type(this));}

  /* methods for working with field names */

  inline int               field_num(const string& str) const;
  //: Returns the offset of the filed which equals str.
  inline string&           field_name(int i);
  //: Returns the field with an offset of i.
  inline const string&     field_name(int i) const;
  //: Returns the field with an offset of i.
  inline FieldNames&       field_names();
  //: Returns a reference to the underlying FieldNames class.
  inline const FieldNames& field_names() const;
  //: Returns a const reference to the underlying FieldNames class.

  // short names for the above methods
  inline int               names(const string& s) const;
  //: Returns the offset of the filed which equals str.
  inline string&           names(int i);
  //: Returns the field with an offset of i.
  inline const string&     names(int i) const;
  //: Returns the field with an offset of i.
  inline FieldNames&       names();
  //: Returns a reference to the underlying FieldNames class.
  inline const FieldNames& names() const;
  //: Returns a const reference to the underlying FieldNames class.
};

//! with_class = ResUSe

//:
inline void swap (ResUse &x, ResUse &y) {
  ResUse tmp = x;
  x = y;
  y = tmp;
}

//! with_class = Result

//:
inline void swap (Result &x, Result &y) {
  Result tmp = x;
  x = y;
  y = tmp;
}

//: This structure holds the information on the success of queries that
//: don't return any results.
struct ResNSel {
  bool     success;   
  int      insert_id; //: 
  int      rows;      //: Number of rows affected
  string   info;      //: Additional info

  ResNSel() : success(false) {};
  ResNSel (Connection *q);

  operator bool() {return success;}  //: If the query was successful
};  


#endif






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