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Merge pull request #467 from Crzyrndm/experimental/serialisation
locale aware double->string conversions
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| #ifndef XLNT_DETAIL_SERIALISATION_HELPERS_HPP | ||
| #define XLNT_DETAIL_SERIALISATION_HELPERS_HPP | ||
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| #include <xlnt/cell/cell_type.hpp> | ||
| #include <xlnt/cell/index_types.hpp> | ||
| #include <string> | ||
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| namespace xlnt { | ||
| namespace detail { | ||
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| /// parsing assumptions used by the following functions | ||
| /// - on entry, the start element for the element has been consumed by parser->next | ||
| /// - on exit, the closing element has been consumed by parser->next | ||
| /// using these assumptions, the following functions DO NOT use parser->peek (SLOW!!!) | ||
| /// probable further gains from not building an attribute map and using the attribute events instead as the impl just iterates the map | ||
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| /// 'r' == cell reference e.g. 'A1' | ||
| /// https://docs.microsoft.com/en-us/openspecs/office_standards/ms-oe376/db11a912-b1cb-4dff-b46d-9bedfd10cef0 | ||
| /// | ||
| /// a lightweight version of xlnt::cell_reference with no extre functionality (absolute/relative, ...) | ||
| /// many thousands are created during (de)serialisation, so even minor overhead is noticable | ||
| struct Cell_Reference | ||
| { | ||
| // the obvious ctor | ||
| explicit Cell_Reference(xlnt::row_t row_arg, xlnt::column_t::index_t column_arg) noexcept | ||
| : row(row_arg), column(column_arg) | ||
| { | ||
| } | ||
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| // the common case. row # is already known during parsing (from parent <row> element) | ||
| // just need to evaluate the column | ||
| explicit Cell_Reference(xlnt::row_t row_arg, const std::string &reference) noexcept | ||
| : row(row_arg) | ||
| { | ||
| // only three characters allowed for the column | ||
| // assumption: | ||
| // - regex pattern match: [A-Z]{1,3}\d{1,7} | ||
| const char *iter = reference.c_str(); | ||
| int temp = *iter - 'A' + 1; // 'A' == 1 | ||
| ++iter; | ||
| if (*iter >= 'A') // second char | ||
| { | ||
| temp *= 26; // LHS values are more significant | ||
| temp += *iter - 'A' + 1; // 'A' == 1 | ||
| ++iter; | ||
| if (*iter >= 'A') // third char | ||
| { | ||
| temp *= 26; // LHS values are more significant | ||
| temp += *iter - 'A' + 1; // 'A' == 1 | ||
| } | ||
| } | ||
| column = static_cast<xlnt::column_t::index_t>(temp); | ||
| } | ||
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| // for sorting purposes | ||
| bool operator<(const Cell_Reference &rhs) | ||
| { | ||
| // row first, serialisation is done by row then column | ||
| if (row < rhs.row) | ||
| { | ||
| return true; | ||
| } | ||
| else if (rhs.row < row) | ||
| { | ||
| return false; | ||
| } | ||
| // same row, column comparison | ||
| return column < rhs.column; | ||
| } | ||
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| xlnt::row_t row; // range:[1, 1048576] | ||
| xlnt::column_t::index_t column; // range:["A", "ZZZ"] -> [1, 26^3] -> [1, 17576] | ||
| }; | ||
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| // <c> inside <row> element | ||
| // https://docs.microsoft.com/en-us/dotnet/api/documentformat.openxml.spreadsheet.cell?view=openxml-2.8.1 | ||
| struct Cell | ||
| { | ||
| // sort cells by location, row first | ||
| bool operator<(const Cell &rhs) | ||
| { | ||
| return ref < rhs.ref; | ||
| } | ||
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| bool is_phonetic = false; // 'ph' | ||
| xlnt::cell_type type = xlnt::cell_type::number; // 't' | ||
| int cell_metatdata_idx = -1; // 'cm' | ||
| int style_index = -1; // 's' | ||
| Cell_Reference ref{0, 0}; // 'r' | ||
| std::string value; // <v> OR <is> | ||
| std::string formula_string; // <f> | ||
| }; | ||
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| } // namespace detail | ||
| } // namespace xlnt | ||
| #endif |
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