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| -rw-r--r-- | include/ixion/formula.hpp | 217 |
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diff --git a/include/ixion/formula.hpp b/include/ixion/formula.hpp new file mode 100644 index 0000000..f15c72d --- /dev/null +++ b/include/ixion/formula.hpp @@ -0,0 +1,217 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + */ + +#ifndef INCLUDED_IXION_FORMULA_HPP +#define INCLUDED_IXION_FORMULA_HPP + +#include "formula_tokens.hpp" +#include "types.hpp" +#include "env.hpp" + +#include <string> + +namespace ixion { + +class formula_cell; +class formula_name_resolver; +class model_context; + +/** + * Parse a raw formula expression string into formula tokens. + * + * @param cxt model context. + * @param pos address of the cell that has the formula expression. + * @param resolver name resolver object used to resolve name tokens. + * @param formula raw formula expression string to parse. + * + * @return formula tokens representing the parsed formula expression. + */ +IXION_DLLPUBLIC formula_tokens_t parse_formula_string( + model_context& cxt, const abs_address_t& pos, + const formula_name_resolver& resolver, std::string_view formula); + +/** + * Create a set of tokens that represent an invalid formula. + * + * This can be used for a cell containing an invalid formula expression, and + * the error information needs to be preserved. + * + * @param cxt model context. + * @param src_formula original formula string. + * @param error error string. + * + * @return a set of tokens, the first of which is a token of type fop_error, + * followed by two string tokens. The second token stores the + * original formula string, whereas the third one stores the error + * string. The first token stores the number of tokens that follows + * as its value of type std::size_t, which is always 2 in the current + * implementation. + */ +IXION_DLLPUBLIC formula_tokens_t create_formula_error_tokens( + model_context& cxt, std::string_view src_formula, + std::string_view error); + +/** + * Convert formula tokens into a human-readable string representation. + * + * @param cxt model context. + * @param pos address of the cell that has the formula tokens. + * @param resolver name resolver object used to print name tokens. + * @param tokens formula tokens. + * + * @return string representation of the formula tokens. + */ +IXION_DLLPUBLIC std::string print_formula_tokens( + const model_context& cxt, const abs_address_t& pos, + const formula_name_resolver& resolver, const formula_tokens_t& tokens); + +/** + * Convert formula tokens into a human-readable string representation. + * + * @param config Configuration options for printing preferences. + * @param cxt Model context. + * @param pos Address of the cell that has the formula tokens. + * @param resolver Name resolver object used to print name tokens. + * @param tokens Formula tokens to print. + * + * @return string representation of the formula tokens. + */ +IXION_DLLPUBLIC std::string print_formula_tokens( + const print_config& config, const model_context& cxt, const abs_address_t& pos, + const formula_name_resolver& resolver, const formula_tokens_t& tokens); + +/** + * Convert an individual formula token into a human-readable string + * representation. + * + * @param cxt model context. + * @param pos address of the cell that has the formula tokens. + * @param resolver name resolver object used to print name tokens. + * @param token formula token to convert. + * + * @return string representation of the formula token. + */ +IXION_DLLPUBLIC std::string print_formula_token( + const model_context& cxt, const abs_address_t& pos, + const formula_name_resolver& resolver, const formula_token& token); + +/** + * Convert an individual formula token into a human-readable string + * representation. + * + * @param config Configuration options for printing preferences. + * @param cxt Model context. + * @param pos Address of the cell that has the formula tokens. + * @param resolver Name resolver object used to print name tokens. + * @param token Formula token to convert. + * + * @return string representation of the formula token. + */ +IXION_DLLPUBLIC std::string print_formula_token( + const print_config& config, const model_context& cxt, const abs_address_t& pos, + const formula_name_resolver& resolver, const formula_token& token); + +/** + * Regisiter a formula cell with cell dependency tracker. + * + * @param cxt model context. + * @param pos address of the cell being registered. In case of grouped + * cells, the position must be that of teh top-left cell of that + * group. + * @param cell (optional) pointer to the formula cell object to register. + * You can skip this parameter, in which case the formula cell + * object will be fetched from the address of the cell. But + * passing a pointer will save the overhead of fetching. + */ +void IXION_DLLPUBLIC register_formula_cell( + model_context& cxt, const abs_address_t& pos, const formula_cell* cell = nullptr); + +/** + * Unregister a formula cell with cell dependency tracker if a formula cell + * exists at specified cell address. If there is no existing cell at the + * specified address, or the cell is not a formula cell, this function is a + * no-op. + * + * @param cxt model context. + * @param pos address of the cell being unregistered. + */ +void IXION_DLLPUBLIC unregister_formula_cell( + model_context& cxt, const abs_address_t& pos); + +/** + * Get the positions of those formula cells that directly or indirectly + * depend on the specified source cells. + * + * @param cxt model context. + * @param modified_cells collection of the postiions of cells that have been + * modified. + * + * @return collection of the positions of formula cells that directly or + * indirectly depend on at least one of the specified source cells. + */ +IXION_DLLPUBLIC abs_address_set_t query_dirty_cells( + model_context& cxt, const abs_address_set_t& modified_cells); + +/** + * Get a sequence of the positions of all formula cells that track at least + * one of the specified modified cells either directly or indirectly. Such + * formula cells are referred to as "dirty" formula cells. The sequence + * returned from this function is already sorted in topological order based + * on the dependency relationships between the affected formula cells. Note + * that if the model contains volatile formula cells, they will be included + * in the returned sequence each and every time. + * + * Use query_dirty_cells() instead if you don't need the results to be sorted + * in order of dependency, to avoid the extra overhead incurred by the + * sorting. + * + * @param cxt model context. + * @param modified_cells a collection of non-formula cells whose values have + * been updated. You can specify one or more ranges + * of cells rather than individual cell positions. + * @param dirty_formula_cells (optional) a collection of formula cells that + * are already known to be dirty. These formula + * cells will be added to the list of the + * affected formula cells returned from this + * function. Note that even though this + * parameter is a set of cell ranges, regular + * formula cell positions must be given as single + * cell addresses. Only the positions of grouped + * formula cells must be given as ranges. + * + * @return an sequence containing the positions of the formula cells that + * track at least one of the modified cells, as well as those + * formula cells that are already known to be dirty. + */ +IXION_DLLPUBLIC std::vector<abs_range_t> query_and_sort_dirty_cells( + model_context& cxt, const abs_range_set_t& modified_cells, + const abs_range_set_t* dirty_formula_cells = nullptr); + +/** + * Calculate all specified formula cells in the order they occur in the + * sequence. + * + * @param cxt model context. + * @param formula_cells formula cells to be calculated. The cells will be + * calculated in the order they appear in the sequence. + * In a typical use case, this will be the returned + * value from query_and_sort_dirty_cells. + * @param thread_count number of calculation threads to use. Note that + * passing 0 will make the process use the main thread + * only, while passing any number greater than 0 will + * make the process spawn specified number of + * calculation threads plus one additional thread to + * manage the calculation threads. + */ +void IXION_DLLPUBLIC calculate_sorted_cells( + model_context& cxt, const std::vector<abs_range_t>& formula_cells, size_t thread_count); + +} // namespace ixion + +#endif + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |