77 lines
2.2 KiB
C++
77 lines
2.2 KiB
C++
#include "StarJsonPath.hpp"
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namespace Star {
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namespace JsonPath {
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TypeHint parsePointer(String& buffer, String const& path, String::const_iterator& iterator, String::const_iterator end) {
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buffer.clear();
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if (*iterator != '/')
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throw ParsingException::format("Missing leading '/' in Json pointer \"{}\"", path);
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iterator++;
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while (iterator != end && *iterator != '/') {
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if (*iterator == '~') {
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++iterator;
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if (iterator == end)
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throw ParsingException::format("Incomplete escape sequence in Json pointer \"{}\"", path);
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if (*iterator == '0')
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buffer.append('~');
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else if (*iterator == '1')
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buffer.append('/');
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else
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throw ParsingException::format("Invalid escape sequence in Json pointer \"{}\"", path);
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++iterator;
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} else
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buffer.append(*iterator++);
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}
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Maybe<size_t> index = maybeLexicalCast<size_t>(buffer);
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if (index.isValid() || (buffer == "-" && iterator == end))
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return TypeHint::Array;
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return TypeHint::Object;
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}
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TypeHint parseQueryPath(String& buffer, String const& path, String::const_iterator& iterator, String::const_iterator end) {
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buffer.clear();
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if (*iterator == '.') {
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throw ParsingException::format("Entry starts with '.' in query path \"{}\"", path);
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} else if (*iterator == '[') {
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// Parse array number and ']'
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// Consume initial '['
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++iterator;
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while (iterator != end && *iterator >= '0' && *iterator <= '9')
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buffer.append(*iterator++);
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if (iterator == end || *iterator != ']')
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throw ParsingException::format("Array has no trailing ']' or has invalid character in query path \"{}\"", path);
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// Consume trailing ']'
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++iterator;
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// Consume trailing '.'
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if (iterator != end && *iterator == '.')
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++iterator;
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return TypeHint::Array;
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} else {
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// Parse path up to next '.' or '['
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while (iterator != end && *iterator != '.' && *iterator != '[')
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buffer.append(*iterator++);
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// Consume single trailing '.' if it exists
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if (iterator != end && *iterator == '.')
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++iterator;
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return TypeHint::Object;
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}
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}
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}
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}
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