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#ifndef SIMDJSON_INLINE_OBJECT_H
#define SIMDJSON_INLINE_OBJECT_H
#include "simdjson/dom/element.h"
#include "simdjson/dom/object.h"
#include "simdjson/portability.h"
#include <cstring>
#include <string>
namespace simdjson {
//
// simdjson_result<dom::object> inline implementation
//
really_inline simdjson_result<dom::object>::simdjson_result() noexcept
: internal::simdjson_result_base<dom::object>() {}
really_inline simdjson_result<dom::object>::simdjson_result(dom::object value) noexcept
: internal::simdjson_result_base<dom::object>(std::forward<dom::object>(value)) {}
really_inline simdjson_result<dom::object>::simdjson_result(error_code error) noexcept
: internal::simdjson_result_base<dom::object>(error) {}
inline simdjson_result<dom::element> simdjson_result<dom::object>::operator[](const std::string_view &key) const noexcept {
if (error()) { return error(); }
return first[key];
}
inline simdjson_result<dom::element> simdjson_result<dom::object>::operator[](const char *key) const noexcept {
if (error()) { return error(); }
return first[key];
}
inline simdjson_result<dom::element> simdjson_result<dom::object>::at(const std::string_view &json_pointer) const noexcept {
if (error()) { return error(); }
return first.at(json_pointer);
}
inline simdjson_result<dom::element> simdjson_result<dom::object>::at_key(const std::string_view &key) const noexcept {
if (error()) { return error(); }
return first.at_key(key);
}
inline simdjson_result<dom::element> simdjson_result<dom::object>::at_key_case_insensitive(const std::string_view &key) const noexcept {
if (error()) { return error(); }
return first.at_key_case_insensitive(key);
}
#if SIMDJSON_EXCEPTIONS
inline dom::object::iterator simdjson_result<dom::object>::begin() const noexcept(false) {
if (error()) { throw simdjson_error(error()); }
return first.begin();
}
inline dom::object::iterator simdjson_result<dom::object>::end() const noexcept(false) {
if (error()) { throw simdjson_error(error()); }
return first.end();
}
inline size_t simdjson_result<dom::object>::size() const noexcept(false) {
if (error()) { throw simdjson_error(error()); }
return first.size();
}
#endif // SIMDJSON_EXCEPTIONS
namespace dom {
//
// object inline implementation
//
really_inline object::object() noexcept : tape{} {}
really_inline object::object(const internal::tape_ref &_tape) noexcept : tape{_tape} { }
inline object::iterator object::begin() const noexcept {
return internal::tape_ref(tape.doc, tape.json_index + 1);
}
inline object::iterator object::end() const noexcept {
return internal::tape_ref(tape.doc, tape.after_element() - 1);
}
inline size_t object::size() const noexcept {
return tape.scope_count();
}
inline simdjson_result<element> object::operator[](const std::string_view &key) const noexcept {
return at_key(key);
}
inline simdjson_result<element> object::operator[](const char *key) const noexcept {
return at_key(key);
}
inline simdjson_result<element> object::at(const std::string_view &json_pointer) const noexcept {
size_t slash = json_pointer.find('/');
std::string_view key = json_pointer.substr(0, slash);
// Grab the child with the given key
simdjson_result<element> child;
// If there is an escape character in the key, unescape it and then get the child.
size_t escape = key.find('~');
if (escape != std::string_view::npos) {
// Unescape the key
std::string unescaped(key);
do {
switch (unescaped[escape+1]) {
case '0':
unescaped.replace(escape, 2, "~");
break;
case '1':
unescaped.replace(escape, 2, "/");
break;
default:
return INVALID_JSON_POINTER; // "Unexpected ~ escape character in JSON pointer");
}
escape = unescaped.find('~', escape+1);
} while (escape != std::string::npos);
child = at_key(unescaped);
} else {
child = at_key(key);
}
// If there is a /, we have to recurse and look up more of the path
if (slash != std::string_view::npos) {
child = child.at(json_pointer.substr(slash+1));
}
return child;
}
inline simdjson_result<element> object::at_key(const std::string_view &key) const noexcept {
iterator end_field = end();
for (iterator field = begin(); field != end_field; ++field) {
if (field.key_equals(key)) {
return field.value();
}
}
return NO_SUCH_FIELD;
}
// In case you wonder why we need this, please see
// https://github.com/simdjson/simdjson/issues/323
// People do seek keys in a case-insensitive manner.
inline simdjson_result<element> object::at_key_case_insensitive(const std::string_view &key) const noexcept {
iterator end_field = end();
for (iterator field = begin(); field != end_field; ++field) {
if (field.key_equals_case_insensitive(key)) {
return field.value();
}
}
return NO_SUCH_FIELD;
}
//
// object::iterator inline implementation
//
really_inline object::iterator::iterator(const internal::tape_ref &_tape) noexcept : tape{_tape} { }
inline const key_value_pair object::iterator::operator*() const noexcept {
return key_value_pair(key(), value());
}
inline bool object::iterator::operator!=(const object::iterator& other) const noexcept {
return tape.json_index != other.tape.json_index;
}
inline bool object::iterator::operator==(const object::iterator& other) const noexcept {
return tape.json_index == other.tape.json_index;
}
inline bool object::iterator::operator<(const object::iterator& other) const noexcept {
return tape.json_index < other.tape.json_index;
}
inline bool object::iterator::operator<=(const object::iterator& other) const noexcept {
return tape.json_index <= other.tape.json_index;
}
inline bool object::iterator::operator>=(const object::iterator& other) const noexcept {
return tape.json_index >= other.tape.json_index;
}
inline bool object::iterator::operator>(const object::iterator& other) const noexcept {
return tape.json_index > other.tape.json_index;
}
inline object::iterator& object::iterator::operator++() noexcept {
tape.json_index++;
tape.json_index = tape.after_element();
return *this;
}
inline object::iterator object::iterator::operator++(int) noexcept {
object::iterator out = *this;
++*this;
return out;
}
inline std::string_view object::iterator::key() const noexcept {
return tape.get_string_view();
}
inline uint32_t object::iterator::key_length() const noexcept {
return tape.get_string_length();
}
inline const char* object::iterator::key_c_str() const noexcept {
return reinterpret_cast<const char *>(&tape.doc->string_buf[size_t(tape.tape_value()) + sizeof(uint32_t)]);
}
inline element object::iterator::value() const noexcept {
return element(internal::tape_ref(tape.doc, tape.json_index + 1));
}
/**
* Design notes:
* Instead of constructing a string_view and then comparing it with a
* user-provided strings, it is probably more performant to have dedicated
* functions taking as a parameter the string we want to compare against
* and return true when they are equal. That avoids the creation of a temporary
* std::string_view. Though it is possible for the compiler to avoid entirely
* any overhead due to string_view, relying too much on compiler magic is
* problematic: compiler magic sometimes fail, and then what do you do?
* Also, enticing users to rely on high-performance function is probably better
* on the long run.
*/
inline bool object::iterator::key_equals(const std::string_view & o) const noexcept {
// We use the fact that the key length can be computed quickly
// without access to the string buffer.
const uint32_t len = key_length();
if(o.size() == len) {
// We avoid construction of a temporary string_view instance.
return (memcmp(o.data(), key_c_str(), len) == 0);
}
return false;
}
inline bool object::iterator::key_equals_case_insensitive(const std::string_view & o) const noexcept {
// We use the fact that the key length can be computed quickly
// without access to the string buffer.
const uint32_t len = key_length();
if(o.size() == len) {
// See For case-insensitive string comparisons, avoid char-by-char functions
// https://lemire.me/blog/2020/04/30/for-case-insensitive-string-comparisons-avoid-char-by-char-functions/
// Note that it might be worth rolling our own strncasecmp function, with vectorization.
return (simdjson_strncasecmp(o.data(), key_c_str(), len) == 0);
}
return false;
}
//
// key_value_pair inline implementation
//
inline key_value_pair::key_value_pair(const std::string_view &_key, element _value) noexcept :
key(_key), value(_value) {}
inline std::ostream& operator<<(std::ostream& out, const object &value) {
return out << minify<object>(value);
}
inline std::ostream& operator<<(std::ostream& out, const key_value_pair &value) {
return out << minify<key_value_pair>(value);
}
} // namespace dom
template<>
inline std::ostream& minifier<dom::object>::print(std::ostream& out) {
out << '{';
auto pair = value.begin();
auto end = value.end();
if (pair != end) {
out << minify<dom::key_value_pair>(*pair);
for (++pair; pair != end; ++pair) {
out << "," << minify<dom::key_value_pair>(*pair);
}
}
return out << '}';
}
template<>
inline std::ostream& minifier<dom::key_value_pair>::print(std::ostream& out) {
return out << '"' << internal::escape_json_string(value.key) << "\":" << value.value;
}
#if SIMDJSON_EXCEPTIONS
template<>
inline std::ostream& minifier<simdjson_result<dom::object>>::print(std::ostream& out) {
if (value.error()) { throw simdjson_error(value.error()); }
return out << minify<dom::object>(value.first);
}
inline std::ostream& operator<<(std::ostream& out, const simdjson_result<dom::object> &value) noexcept(false) {
return out << minify<simdjson_result<dom::object>>(value);
}
#endif // SIMDJSON_EXCEPTIONS
} // namespace simdjson
#if defined(__cpp_lib_ranges)
static_assert(std::ranges::view<simdjson::dom::object>);
static_assert(std::ranges::sized_range<simdjson::dom::object>);
#if SIMDJSON_EXCEPTIONS
static_assert(std::ranges::view<simdjson::simdjson_result<simdjson::dom::object>>);
static_assert(std::ranges::sized_range<simdjson::simdjson_result<simdjson::dom::object>>);
#endif // SIMDJSON_EXCEPTIONS
#endif // defined(__cpp_lib_ranges)
#endif // SIMDJSON_INLINE_OBJECT_H