90 lines
2.9 KiB
C
90 lines
2.9 KiB
C
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#pragma once
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/*
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* Copyright (c) 2013-2015, Roland Bock
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <memory>
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namespace sqlpp
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{
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namespace database
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{
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/*
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* bind_result_t binds values of a sqlpp11 result row
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* to the results of a statement
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*/
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class bind_result_t
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{
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public:
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bind_result_t(); // default constructor for a result that will not yield a valid row
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bind_result_t(...);
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bind_result_t(const bind_result_t&) = delete;
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bind_result_t(bind_result_t&& rhs);
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bind_result_t& operator=(const bind_result_t&) = delete;
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bind_result_t& operator=(bind_result_t&&);
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~bind_result_t();
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bool operator==(const bind_result_t& rhs) const;
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template <typename ResultRow>
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void next(ResultRow& result_row);
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// something similar to this:
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/*
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{
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if (!_handle)
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{
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result_row.invalidate();
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return;
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}
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if (next_impl())
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{
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if (not result_row)
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{
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result_row.validate();
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}
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result_row._bind(*this); // bind result row values to results
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}
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else
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{
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if (result_row)
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result_row.invalidate();
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}
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};
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*/
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// These are called by the result row to bind individual result values
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// More will be added over time
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void _bind_boolean_result(size_t index, signed char* value, bool* is_null);
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void _bind_floating_point_result(size_t index, double* value, bool* is_null);
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void _bind_integral_result(size_t index, int64_t* value, bool* is_null);
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void _bind_text_result(size_t index, const char** text, size_t* len);
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...
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};
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}
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}
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