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Applications: Move to Userland/Applications/
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Andreas Kling
parent
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commit
dc28c07fa5
287 changed files with 1 additions and 1 deletions
272
Userland/Applications/Spreadsheet/Readers/XSV.cpp
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272
Userland/Applications/Spreadsheet/Readers/XSV.cpp
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/*
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* Copyright (c) 2020, the SerenityOS developers.
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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
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. 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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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or 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"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED 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
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "XSV.h"
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#include <AK/StringBuilder.h>
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namespace Reader {
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ParserBehaviour operator&(ParserBehaviour left, ParserBehaviour right)
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{
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return static_cast<ParserBehaviour>(static_cast<u32>(left) & static_cast<u32>(right));
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}
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ParserBehaviour operator|(ParserBehaviour left, ParserBehaviour right)
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{
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return static_cast<ParserBehaviour>(static_cast<u32>(left) | static_cast<u32>(right));
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}
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void XSV::set_error(ReadError error)
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{
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if (m_error == ReadError::None)
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m_error = error;
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}
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Vector<String> XSV::headers() const
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{
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Vector<String> headers;
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for (auto& field : m_names)
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headers.append(field.is_string_view ? field.as_string_view : field.as_string.view());
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return headers;
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}
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void XSV::parse()
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{
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if ((m_behaviours & ParserBehaviour::ReadHeaders) != ParserBehaviour::None)
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read_headers();
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while (!has_error() && !m_lexer.is_eof())
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m_rows.append(read_row());
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if (!m_lexer.is_eof())
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set_error(ReadError::DataPastLogicalEnd);
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}
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void XSV::read_headers()
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{
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if (!m_names.is_empty()) {
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set_error(ReadError::InternalError);
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m_names.clear();
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}
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m_names = read_row(true);
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}
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Vector<XSV::Field> XSV::read_row(bool header_row)
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{
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Vector<Field> row;
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bool first = true;
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while (!(m_lexer.is_eof() || m_lexer.next_is('\n') || m_lexer.next_is("\r\n")) && (first || m_lexer.consume_specific(m_traits.separator))) {
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first = false;
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row.append(read_one_field());
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}
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if (!m_lexer.is_eof()) {
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auto crlf_ok = m_lexer.consume_specific("\r\n");
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if (!crlf_ok) {
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auto lf_ok = m_lexer.consume_specific('\n');
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if (!lf_ok)
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set_error(ReadError::DataPastLogicalEnd);
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}
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}
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if (!header_row && (m_behaviours & ParserBehaviour::ReadHeaders) != ParserBehaviour::None && row.size() != m_names.size())
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set_error(ReadError::NonConformingColumnCount);
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return row;
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}
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XSV::Field XSV::read_one_field()
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{
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if ((m_behaviours & ParserBehaviour::TrimLeadingFieldSpaces) != ParserBehaviour::None)
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m_lexer.consume_while(is_any_of(" \t\v"));
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bool is_quoted = false;
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Field field;
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if (m_lexer.next_is(m_traits.quote.view())) {
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is_quoted = true;
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field = read_one_quoted_field();
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} else {
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field = read_one_unquoted_field();
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}
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if ((m_behaviours & ParserBehaviour::TrimTrailingFieldSpaces) != ParserBehaviour::None) {
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m_lexer.consume_while(is_any_of(" \t\v"));
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if (!is_quoted) {
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// Also have to trim trailing spaces from unquoted fields.
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StringView view;
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if (field.is_string_view)
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view = field.as_string_view;
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else
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view = field.as_string;
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if (!view.is_empty()) {
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ssize_t i = view.length() - 1;
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for (; i >= 0; --i) {
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if (!view.substring_view(i, 1).is_one_of(" ", "\t", "\v"))
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break;
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}
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view = view.substring_view(0, i + 1);
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}
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if (field.is_string_view)
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field.as_string_view = view;
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else
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field.as_string = field.as_string.substring(0, view.length());
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}
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}
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return field;
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}
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XSV::Field XSV::read_one_quoted_field()
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{
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if (!m_lexer.consume_specific(m_traits.quote))
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set_error(ReadError::InternalError);
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size_t start = m_lexer.tell(), end = start;
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bool is_copy = false;
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StringBuilder builder;
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auto allow_newlines = (m_behaviours & ParserBehaviour::AllowNewlinesInFields) != ParserBehaviour::None;
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for (; !m_lexer.is_eof();) {
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char ch;
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switch (m_traits.quote_escape) {
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case ParserTraits::Backslash:
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if (m_lexer.consume_specific('\\') && m_lexer.consume_specific(m_traits.quote)) {
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// If there is an escaped quote, we have no choice but to make a copy.
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if (!is_copy) {
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is_copy = true;
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builder.append(m_source.substring_view(start, end - start));
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}
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builder.append(m_traits.quote);
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end = m_lexer.tell();
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continue;
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}
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break;
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case ParserTraits::Repeat:
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if (m_lexer.consume_specific(m_traits.quote)) {
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if (m_lexer.consume_specific(m_traits.quote)) {
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// If there is an escaped quote, we have no choice but to make a copy.
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if (!is_copy) {
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is_copy = true;
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builder.append(m_source.substring_view(start, end - start));
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}
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builder.append(m_traits.quote);
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end = m_lexer.tell();
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continue;
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}
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for (size_t i = 0; i < m_traits.quote.length(); ++i)
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m_lexer.retreat();
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goto end;
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}
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break;
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}
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if (m_lexer.next_is(m_traits.quote.view()))
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goto end;
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if (!allow_newlines) {
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if (m_lexer.next_is('\n') || m_lexer.next_is("\r\n"))
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goto end;
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}
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ch = m_lexer.consume();
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if (is_copy)
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builder.append(ch);
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end = m_lexer.tell();
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continue;
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end:
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break;
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}
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if (!m_lexer.consume_specific(m_traits.quote))
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set_error(ReadError::QuoteFailure);
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if (is_copy)
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return { {}, builder.to_string(), false };
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return { m_source.substring_view(start, end - start), {}, true };
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}
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XSV::Field XSV::read_one_unquoted_field()
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{
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size_t start = m_lexer.tell(), end = start;
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bool allow_quote_in_field = (m_behaviours & ParserBehaviour::QuoteOnlyInFieldStart) != ParserBehaviour::None;
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for (; !m_lexer.is_eof();) {
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if (m_lexer.next_is(m_traits.separator.view()))
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break;
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if (m_lexer.next_is("\r\n") || m_lexer.next_is("\n"))
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break;
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if (m_lexer.consume_specific(m_traits.quote)) {
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if (!allow_quote_in_field)
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set_error(ReadError::QuoteFailure);
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end = m_lexer.tell();
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continue;
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}
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m_lexer.consume();
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end = m_lexer.tell();
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}
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return { m_source.substring_view(start, end - start), {}, true };
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}
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StringView XSV::Row::operator[](StringView name) const
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{
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ASSERT(!m_xsv.m_names.is_empty());
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auto it = m_xsv.m_names.find_if([&](const auto& entry) { return name == entry; });
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ASSERT(!it.is_end());
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return (*this)[it.index()];
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}
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StringView XSV::Row::operator[](size_t column) const
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{
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auto& field = m_xsv.m_rows[m_index][column];
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if (field.is_string_view)
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return field.as_string_view;
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return field.as_string;
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}
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const XSV::Row XSV::operator[](size_t index) const
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{
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return const_cast<XSV&>(*this)[index];
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}
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XSV::Row XSV::operator[](size_t index)
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{
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ASSERT(m_rows.size() > index);
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return Row { *this, index };
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}
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}
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