dbcompare.h

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// Database comparison and filter methods -*- C++ -*-

// $Id: dbcompare.h 856 2008-12-18 16:08:24Z dferi $
// Copyright (C) 2003 Hermann Schichl
//
// This file is part of the COCONUT API.  This library
// is free software; you can redistribute it and/or modify it under the
// terms of the Library GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// Library GNU General Public License for more details.

// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the Library GNU General Public License.  This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the Library GNU General Public License.

#ifndef _DBCOMPARE_H_
#define _DBCOMPARE_H_

#include <add_algo>
#include <database>
#include <basic_alltype.h>

namespace coco {

#define DB_COMPARE_CMP_EQ       0
#define DB_COMPARE_CMP_NE       1
#define DB_COMPARE_CMP_GT       2
#define DB_COMPARE_CMP_GE       3
#define DB_COMPARE_CMP_LT       4
#define DB_COMPARE_CMP_LE       5
#define DB_COMPARE_CMP_IN       6

#define DB_COMPARE_CMP_ABSEQ    7
#define DB_COMPARE_CMP_ABSNE    8
#define DB_COMPARE_CMP_ABSGT    9
#define DB_COMPARE_CMP_ABSGE   10
#define DB_COMPARE_CMP_ABSLT   11
#define DB_COMPARE_CMP_ABSLE   12
#define DB_COMPARE_CMP_ABSIN   13

#define dbc_is_cmp(X)  ((X) <= DB_COMPARE_CMP_ABSIN)

#define dbc_is_sort(X) ((X) > DB_COMPARE_CMP_ABSIN)

#define DB_COMPARE_SORT_MIN    14
#define DB_COMPARE_SORT_MAX    15
#define DB_COMPARE_SORT_ABSMIN 16
#define DB_COMPARE_SORT_ABSMAX 17
#define DB_COMPARE_SORT_TRUE   18
#define DB_COMPARE_SORT_FALSE  19

typedef enum { dbc_cmp_eq=DB_COMPARE_CMP_EQ,
               dbc_cmp_ne=DB_COMPARE_CMP_NE,
               dbc_cmp_gt=DB_COMPARE_CMP_GT,
               dbc_cmp_ge=DB_COMPARE_CMP_GE,
               dbc_cmp_lt=DB_COMPARE_CMP_LT,
               dbc_cmp_le=DB_COMPARE_CMP_LE,
               dbc_cmp_in=DB_COMPARE_CMP_IN,
               dbc_cmp_abseq=DB_COMPARE_CMP_ABSEQ,
               dbc_cmp_absne=DB_COMPARE_CMP_ABSNE,
               dbc_cmp_absgt=DB_COMPARE_CMP_ABSGT,
               dbc_cmp_absge=DB_COMPARE_CMP_ABSGE,
               dbc_cmp_abslt=DB_COMPARE_CMP_ABSLT,
               dbc_cmp_absle=DB_COMPARE_CMP_ABSLE,
               dbc_cmp_absin=DB_COMPARE_CMP_ABSIN,
               dbc_sort_min=DB_COMPARE_SORT_MIN,
               dbc_sort_max=DB_COMPARE_SORT_MAX,
               dbc_sort_absmin=DB_COMPARE_SORT_ABSMIN,
               dbc_sort_absmax=DB_COMPARE_SORT_ABSMAX,
               dbc_sort_true=DB_COMPARE_SORT_TRUE,
               dbc_sort_false=DB_COMPARE_SORT_FALSE
             } dbc_method;

void parse_dbcompare_expression(const std::string& s,
    std::map<int,std::triple<std::string, dbc_method, basic_alltype> >& cols,
    std::vector<std::vector<int> >& expr);

void parse_dbcompare_sortorder(const std::string& s,
    std::map<int,std::triple<std::string, dbc_method, basic_alltype> >& cols,
    std::vector<int>& order);

template <typename _AT> 
void filter_from_view(typename std::vector<std::pair<vdbl::rowid,_AT> >& riv,
    vdbl::view* iv, const std::map<int,std::triple<std::string,
        dbc_method, basic_alltype> >& cols,
    const std::vector<std::vector<int> >& expr);

template <typename _AT> 
void list_from_view(typename std::vector<std::pair<vdbl::rowid,_AT> >& riv,
    vdbl::view* iv, const std::map<int,std::triple<std::string,
        dbc_method, basic_alltype > >& cols, const std::vector<int>& sort,
        unsigned int n);

} // namespace coco

#include <dbcompare.hpp>

#endif /* _DBCOMPARE_H_ */

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