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79 lines
2.8 KiB
C++
79 lines
2.8 KiB
C++
#include <boost/algorithm/string.hpp>
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#include "error.h"
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#include "string.h"
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using namespace std;
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string replace_common_escape_characters(string text) {
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// Copied from clickhouse_driver/util/escape.py
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boost::replace_all(text, "\\a", "\a");
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boost::replace_all(text, "\\b", "\b");
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boost::replace_all(text, "\\f", "\f");
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boost::replace_all(text, "\\n", "\n");
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boost::replace_all(text, "\\r", "\r");
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boost::replace_all(text, "\\t", "\t");
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boost::replace_all(text, "\\v", "\v");
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boost::replace_all(text, "\\0", ""); // NUL characters are ignored
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boost::replace_all(text, "\\\\", "\\");
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return text;
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}
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string parse_string_literal_text(string text) {
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size_t original_text_size = text.size();
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if (original_text_size == 0) {
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throw ParsingError("Encountered an unexpected empty string input");
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}
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const char first_char = text.front();
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const char last_char = text.back();
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if (first_char == '\'' && last_char == '\'') {
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text = text.substr(1, original_text_size - 2);
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boost::replace_all(text, "''", "'");
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boost::replace_all(text, "\\'", "'");
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} else if (first_char == '"' && last_char == '"') {
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text = text.substr(1, original_text_size - 2);
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boost::replace_all(text, "\"\"", "\"");
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boost::replace_all(text, "\\\"", "\"");
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} else if (first_char == '`' && last_char == '`') {
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text = text.substr(1, original_text_size - 2);
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boost::replace_all(text, "``", "`");
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boost::replace_all(text, "\\`", "`");
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} else if (first_char == '{' && last_char == '}') {
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text = text.substr(1, original_text_size - 2);
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boost::replace_all(text, "{{", "{");
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boost::replace_all(text, "\\{", "{");
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} else {
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throw SyntaxError("Invalid string literal, must start and end with the same quote type: " + text);
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}
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return replace_common_escape_characters(text);
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}
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string parse_string_literal_ctx(antlr4::tree::TerminalNode* node) {
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string text = node->getText();
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try {
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return parse_string_literal_text(text);
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} catch (SyntaxError& e) {
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throw SyntaxError(e.what(), node->getSymbol()->getStartIndex(), node->getSymbol()->getStopIndex() + 1);
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} catch (ParsingError& e) {
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throw ParsingError(e.what(), node->getSymbol()->getStartIndex(), node->getSymbol()->getStopIndex() + 1);
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}
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}
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string parse_string_text_ctx(antlr4::tree::TerminalNode* node, bool escape_quotes) {
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string text = node->getText();
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try {
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if (escape_quotes) {
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boost::replace_all(text, "''", "'");
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boost::replace_all(text, "\\'", "'");
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}
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boost::replace_all(text, "\\{", "{");
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return replace_common_escape_characters(text);
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} catch (SyntaxError& e) {
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throw SyntaxError(e.what(), node->getSymbol()->getStartIndex(), node->getSymbol()->getStopIndex() + 1);
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} catch (ParsingError& e) {
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throw ParsingError(e.what(), node->getSymbol()->getStartIndex(), node->getSymbol()->getStopIndex() + 1);
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}
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}
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