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https://github.com/nlohmann/json.git
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Compare commits
| Author | SHA1 | Date | |
|---|---|---|---|
 Niels Lohmann
|
a33e015e39 |
@@ -8,11 +8,10 @@
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#pragma once
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#include <algorithm> // find_if
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#include <cstddef>
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#include <string> // string
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#include <type_traits> // enable_if_t
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#include <utility> // move, pair
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#include <utility> // move
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#include <vector> // vector
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#include <nlohmann/detail/exceptions.hpp>
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@@ -586,17 +585,7 @@ class json_sax_dom_callback_parser
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// add discarded value at the given key and store the reference for later
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if (keep && ref_stack.back())
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{
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auto& obj = *ref_stack.back()->m_data.m_value.object;
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const auto it = obj.find(val);
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if (it != obj.end())
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{
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// this is a duplicate key (legal in JSON); remember its
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// current value so it can be restored later if the new
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// value is rejected by the callback, instead of being
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// erased together with the discarded placeholder
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duplicate_key_stash.emplace_back(&(it->second), it->second);
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}
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object_element = &(obj[val] = discarded);
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object_element = &(ref_stack.back()->m_data.m_value.object->operator[](val) = discarded);
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}
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return true;
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@@ -608,18 +597,13 @@ class json_sax_dom_callback_parser
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{
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if (!callback(static_cast<int>(ref_stack.size()) - 1, parse_event_t::object_end, *ref_stack.back()))
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{
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// discard object, unless this slot holds a duplicate key's
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// previous value pending restoration, in which case that
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// value is restored instead of being discarded
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if (!resolve_duplicate_key_stash(ref_stack.back(), true))
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{
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*ref_stack.back() = discarded;
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// discard object
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*ref_stack.back() = discarded;
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#if JSON_DIAGNOSTIC_POSITIONS
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// Set start/end positions for discarded object.
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handle_diagnostic_positions_for_json_value(*ref_stack.back());
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// Set start/end positions for discarded object.
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handle_diagnostic_positions_for_json_value(*ref_stack.back());
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#endif
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}
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}
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else
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{
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@@ -633,10 +617,6 @@ class json_sax_dom_callback_parser
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#endif
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ref_stack.back()->set_parents();
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// this object is finally, definitively kept; drop any
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// pending duplicate-key stash entry for its slot since it
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// can no longer be restored
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resolve_duplicate_key_stash(ref_stack.back(), false);
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}
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}
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@@ -706,25 +686,16 @@ class json_sax_dom_callback_parser
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#endif
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ref_stack.back()->set_parents();
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// this array is finally, definitively kept; drop any
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// pending duplicate-key stash entry for its slot since it
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// can no longer be restored
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resolve_duplicate_key_stash(ref_stack.back(), false);
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}
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else
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{
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// discard array, unless this slot holds a duplicate key's
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// previous value pending restoration, in which case that
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// value is restored instead of being discarded
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if (!resolve_duplicate_key_stash(ref_stack.back(), true))
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{
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*ref_stack.back() = discarded;
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// discard array
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*ref_stack.back() = discarded;
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#if JSON_DIAGNOSTIC_POSITIONS
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// Set start/end positions for discarded array.
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handle_diagnostic_positions_for_json_value(*ref_stack.back());
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// Set start/end positions for discarded array.
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handle_diagnostic_positions_for_json_value(*ref_stack.back());
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#endif
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}
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}
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}
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@@ -838,48 +809,14 @@ class json_sax_dom_callback_parser
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}
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#endif
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/// if there is a pending duplicate-key stash entry for this exact slot,
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/// remove it from the stash; if restore_value is true, the stashed
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/// previous value is moved back into the slot first (use this when the
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/// new value at that slot was rejected); otherwise the stash entry is
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/// simply dropped (use this when the new value was accepted, so it
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/// correctly supersedes the old one and no restore should ever happen
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/// for this slot again)
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/// @return whether a matching stash entry was found (and processed)
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bool resolve_duplicate_key_stash(BasicJsonType* slot, bool restore_value)
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{
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const auto it = std::find_if(duplicate_key_stash.begin(), duplicate_key_stash.end(),
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[slot](const std::pair<BasicJsonType*, BasicJsonType>& entry)
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{
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return entry.first == slot;
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});
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if (it == duplicate_key_stash.end())
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{
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return false;
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}
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if (restore_value)
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{
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*slot = std::move(it->second);
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}
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duplicate_key_stash.erase(it);
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return true;
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}
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/// remove the discarded value the callback rejected from its parent,
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/// unless it is a duplicate key's slot with a stashed previous value,
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/// in which case that previous value is restored instead
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void remove_discarded_value(BasicJsonType& parent)
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/// remove the discarded value the callback rejected from its parent
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static void remove_discarded_value(BasicJsonType& parent)
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{
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for (auto it = parent.begin(); it != parent.end(); ++it)
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{
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if (it->is_discarded())
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{
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if (!resolve_duplicate_key_stash(&(*it), true))
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{
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parent.erase(it);
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}
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parent.erase(it);
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break;
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}
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}
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@@ -977,16 +914,6 @@ class json_sax_dom_callback_parser
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JSON_ASSERT(object_element);
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*object_element = std::move(value);
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if (!skip_callback)
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{
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// this scalar value finally, definitively replaces whatever was
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// at this slot; drop any pending duplicate-key stash entry for
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// it since it can no longer be restored (a container value at
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// this slot is resolved later, in end_object()/end_array(),
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// since skip_callback is true for the placeholder handling that
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// happens here for those)
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resolve_duplicate_key_stash(object_element, false);
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}
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return {true, object_element};
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}
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@@ -1000,12 +927,6 @@ class json_sax_dom_callback_parser
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std::vector<bool> key_keep_stack {}; // NOLINT(readability-redundant-member-init)
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/// helper to hold the reference for the next object element
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BasicJsonType* object_element = nullptr;
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/// stash of (slot pointer, previous value) for object members that
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/// already existed when key() was called again for the same key
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/// (duplicate keys); used to restore the previous value if the new
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/// value is later rejected by the callback, instead of erasing the
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/// member entirely
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std::vector<std::pair<BasicJsonType*, BasicJsonType>> duplicate_key_stash {};
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/// whether a syntax error occurred
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bool errored = false;
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/// callback function
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+14
-121
@@ -3573,7 +3573,6 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
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{
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using std::swap;
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swap(*(m_data.m_value.array), other);
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set_parents();
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}
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else
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{
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@@ -3590,7 +3589,6 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
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{
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using std::swap;
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swap(*(m_data.m_value.object), other);
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set_parents();
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}
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else
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{
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@@ -5159,139 +5157,34 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
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case value_t::object:
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{
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// first pass: record, for every source key, whether it is
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// common to both objects (in source's iteration order) or
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// was deleted (i.e., in source but not in target) -- this is
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// a by-product of the target.find() call already needed to
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// tell the two cases apart, so it adds no extra lookups. The
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// "remove" ops themselves are emitted later, interleaved
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// with the recursive per-key diffs in the fast path below,
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// to match source's original iteration order (as the
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// original, pre-reordering-aware implementation did) instead
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// of grouping all removes before all recursive diffs.
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std::vector<typename object_t::key_type> common_keys_source_order;
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// first pass: traverse this object's elements
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for (auto it = source.cbegin(); it != source.cend(); ++it)
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{
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// escape the key name to be used in a JSON patch
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const auto path_key = detail::concat<string_t>(path, '/', detail::escape(it.key()));
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if (target.find(it.key()) != target.end())
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{
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common_keys_source_order.push_back(it.key());
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}
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}
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// second pass: find keys that were added (i.e., in target but
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// not in source), and record the keys common to both, in
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// target's iteration order -- again a by-product of the
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// source.find() call already needed to detect added keys. At
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// the same time, determine whether every added key comes
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// after every common key in target's order (a precondition
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// for the fast path below, which only ever appends new keys
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// at the very end): for an object_t whose iteration order is
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// a pure function of the key set (e.g. the default std::map,
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// which always iterates in sorted key order), the order
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// check further below is always true and this whole
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// mechanism is effectively a no-op; it only matters for a
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// reorderable object_t such as the one backing `ordered_json`.
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// patch ops for keys that were added (i.e., in target but not
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// in source); built here so the fast path below can reuse
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// them without a second source.find() per target key. Only
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// used by the fast path -- the slow (reordering) path
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// rebuilds "add" ops for every key itself.
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std::vector<typename object_t::key_type> common_keys_target_order;
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basic_json added_ops(value_t::array);
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bool new_keys_form_suffix = true;
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bool seen_new_key = false;
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for (auto it = target.cbegin(); it != target.cend(); ++it)
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{
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if (source.find(it.key()) == source.end())
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{
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seen_new_key = true;
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const auto path_key = detail::concat<string_t>(path, '/', detail::escape(it.key()));
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added_ops.push_back(
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{
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{"op", "add"}, {"path", path_key},
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{"value", it.value()}
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});
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// recursive call to compare object values at key it
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auto temp_diff = diff(it.value(), target[it.key()], path_key);
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result.insert(result.end(), temp_diff.begin(), temp_diff.end());
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}
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else
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{
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common_keys_target_order.push_back(it.key());
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if (seen_new_key)
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{
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new_keys_form_suffix = false;
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}
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}
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}
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if (common_keys_source_order == common_keys_target_order && new_keys_form_suffix)
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{
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// fast path: order of common keys already matches (or the
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// object_t's iteration order does not depend on
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// insertion history), so a plain per-key recursive diff
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// is correct and minimal, as before. common_keys_source_order
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// is, by construction, the subsequence of source's keys
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// that are common to both objects, in source's iteration
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// order -- so it can be walked in lockstep with `source`
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// using a cheap key comparison instead of another lookup.
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// Deleted keys (those source keys not in common_keys_source_order)
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// are interleaved here too, in source's original order, to
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// match the historical (pre-reordering-aware) output order.
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auto common_it = common_keys_source_order.cbegin();
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for (auto it = source.cbegin(); it != source.cend(); ++it)
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{
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if (common_it != common_keys_source_order.cend() && it.key() == *common_it)
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{
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const auto path_key = detail::concat<string_t>(path, '/', detail::escape(it.key()));
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auto temp_diff = diff(it.value(), target[it.key()], path_key);
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result.insert(result.end(), temp_diff.begin(), temp_diff.end());
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++common_it;
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}
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else
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{
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// found a key that is not in target -> remove it
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const auto path_key = detail::concat<string_t>(path, '/', detail::escape(it.key()));
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result.push_back(object(
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{
|
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{"op", "remove"}, {"path", path_key}
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}));
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}
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}
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// append the "add" ops for brand-new keys collected above
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// during the pass over target -- no second source.find()
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// per target key needed
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result.insert(result.end(), added_ops.begin(), added_ops.end());
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}
|
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else
|
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{
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// slow path: the common keys are in a different relative
|
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// order in source and target (only possible for a
|
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// reorderable object_t like ordered_map). Building a
|
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// minimal reordering patch is a nontrivial (LCS-like)
|
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// problem; instead, remove every source key -- both
|
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// deleted keys (which must be removed regardless) and
|
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// common keys (removed so they can be re-added in
|
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// target's order) -- and re-add every key that should
|
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// remain, with its final target value, in target's
|
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// order. basic_json::patch()'s "add" operation on an
|
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// object uses operator[], which appends at the end for a
|
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// vector-backed insertion-ordered map when the key does
|
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// not already exist -- so removing a key and then adding
|
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// it moves it to the end, fixing its position.
|
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for (auto it = source.cbegin(); it != source.cend(); ++it)
|
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{
|
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const auto path_key = detail::concat<string_t>(path, '/', detail::escape(it.key()));
|
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// found a key that is not in o -> remove it
|
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result.push_back(object(
|
||||
{
|
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{"op", "remove"}, {"path", path_key}
|
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}));
|
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}
|
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}
|
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|
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// add every key that is either common (just removed
|
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// above) or brand new, in target's iteration order, so
|
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// that the final order after applying the patch matches
|
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// target exactly
|
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for (auto it = target.cbegin(); it != target.cend(); ++it)
|
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// second pass: traverse other object's elements
|
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for (auto it = target.cbegin(); it != target.cend(); ++it)
|
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{
|
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if (source.find(it.key()) == source.end())
|
||||
{
|
||||
// found a key that is not in this -> add it
|
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const auto path_key = detail::concat<string_t>(path, '/', detail::escape(it.key()));
|
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result.push_back(
|
||||
{
|
||||
|
||||
@@ -7768,11 +7768,10 @@ NLOHMANN_JSON_NAMESPACE_END
|
||||
|
||||
|
||||
|
||||
#include <algorithm> // find_if
|
||||
#include <cstddef>
|
||||
#include <string> // string
|
||||
#include <type_traits> // enable_if_t
|
||||
#include <utility> // move, pair
|
||||
#include <utility> // move
|
||||
#include <vector> // vector
|
||||
|
||||
// #include <nlohmann/detail/exceptions.hpp>
|
||||
@@ -10114,17 +10113,7 @@ class json_sax_dom_callback_parser
|
||||
// add discarded value at the given key and store the reference for later
|
||||
if (keep && ref_stack.back())
|
||||
{
|
||||
auto& obj = *ref_stack.back()->m_data.m_value.object;
|
||||
const auto it = obj.find(val);
|
||||
if (it != obj.end())
|
||||
{
|
||||
// this is a duplicate key (legal in JSON); remember its
|
||||
// current value so it can be restored later if the new
|
||||
// value is rejected by the callback, instead of being
|
||||
// erased together with the discarded placeholder
|
||||
duplicate_key_stash.emplace_back(&(it->second), it->second);
|
||||
}
|
||||
object_element = &(obj[val] = discarded);
|
||||
object_element = &(ref_stack.back()->m_data.m_value.object->operator[](val) = discarded);
|
||||
}
|
||||
|
||||
return true;
|
||||
@@ -10136,18 +10125,13 @@ class json_sax_dom_callback_parser
|
||||
{
|
||||
if (!callback(static_cast<int>(ref_stack.size()) - 1, parse_event_t::object_end, *ref_stack.back()))
|
||||
{
|
||||
// discard object, unless this slot holds a duplicate key's
|
||||
// previous value pending restoration, in which case that
|
||||
// value is restored instead of being discarded
|
||||
if (!resolve_duplicate_key_stash(ref_stack.back(), true))
|
||||
{
|
||||
*ref_stack.back() = discarded;
|
||||
// discard object
|
||||
*ref_stack.back() = discarded;
|
||||
|
||||
#if JSON_DIAGNOSTIC_POSITIONS
|
||||
// Set start/end positions for discarded object.
|
||||
handle_diagnostic_positions_for_json_value(*ref_stack.back());
|
||||
// Set start/end positions for discarded object.
|
||||
handle_diagnostic_positions_for_json_value(*ref_stack.back());
|
||||
#endif
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
@@ -10161,10 +10145,6 @@ class json_sax_dom_callback_parser
|
||||
#endif
|
||||
|
||||
ref_stack.back()->set_parents();
|
||||
// this object is finally, definitively kept; drop any
|
||||
// pending duplicate-key stash entry for its slot since it
|
||||
// can no longer be restored
|
||||
resolve_duplicate_key_stash(ref_stack.back(), false);
|
||||
}
|
||||
}
|
||||
|
||||
@@ -10234,25 +10214,16 @@ class json_sax_dom_callback_parser
|
||||
#endif
|
||||
|
||||
ref_stack.back()->set_parents();
|
||||
// this array is finally, definitively kept; drop any
|
||||
// pending duplicate-key stash entry for its slot since it
|
||||
// can no longer be restored
|
||||
resolve_duplicate_key_stash(ref_stack.back(), false);
|
||||
}
|
||||
else
|
||||
{
|
||||
// discard array, unless this slot holds a duplicate key's
|
||||
// previous value pending restoration, in which case that
|
||||
// value is restored instead of being discarded
|
||||
if (!resolve_duplicate_key_stash(ref_stack.back(), true))
|
||||
{
|
||||
*ref_stack.back() = discarded;
|
||||
// discard array
|
||||
*ref_stack.back() = discarded;
|
||||
|
||||
#if JSON_DIAGNOSTIC_POSITIONS
|
||||
// Set start/end positions for discarded array.
|
||||
handle_diagnostic_positions_for_json_value(*ref_stack.back());
|
||||
// Set start/end positions for discarded array.
|
||||
handle_diagnostic_positions_for_json_value(*ref_stack.back());
|
||||
#endif
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@@ -10366,48 +10337,14 @@ class json_sax_dom_callback_parser
|
||||
}
|
||||
#endif
|
||||
|
||||
/// if there is a pending duplicate-key stash entry for this exact slot,
|
||||
/// remove it from the stash; if restore_value is true, the stashed
|
||||
/// previous value is moved back into the slot first (use this when the
|
||||
/// new value at that slot was rejected); otherwise the stash entry is
|
||||
/// simply dropped (use this when the new value was accepted, so it
|
||||
/// correctly supersedes the old one and no restore should ever happen
|
||||
/// for this slot again)
|
||||
/// @return whether a matching stash entry was found (and processed)
|
||||
bool resolve_duplicate_key_stash(BasicJsonType* slot, bool restore_value)
|
||||
{
|
||||
const auto it = std::find_if(duplicate_key_stash.begin(), duplicate_key_stash.end(),
|
||||
[slot](const std::pair<BasicJsonType*, BasicJsonType>& entry)
|
||||
{
|
||||
return entry.first == slot;
|
||||
});
|
||||
|
||||
if (it == duplicate_key_stash.end())
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
if (restore_value)
|
||||
{
|
||||
*slot = std::move(it->second);
|
||||
}
|
||||
duplicate_key_stash.erase(it);
|
||||
return true;
|
||||
}
|
||||
|
||||
/// remove the discarded value the callback rejected from its parent,
|
||||
/// unless it is a duplicate key's slot with a stashed previous value,
|
||||
/// in which case that previous value is restored instead
|
||||
void remove_discarded_value(BasicJsonType& parent)
|
||||
/// remove the discarded value the callback rejected from its parent
|
||||
static void remove_discarded_value(BasicJsonType& parent)
|
||||
{
|
||||
for (auto it = parent.begin(); it != parent.end(); ++it)
|
||||
{
|
||||
if (it->is_discarded())
|
||||
{
|
||||
if (!resolve_duplicate_key_stash(&(*it), true))
|
||||
{
|
||||
parent.erase(it);
|
||||
}
|
||||
parent.erase(it);
|
||||
break;
|
||||
}
|
||||
}
|
||||
@@ -10505,16 +10442,6 @@ class json_sax_dom_callback_parser
|
||||
|
||||
JSON_ASSERT(object_element);
|
||||
*object_element = std::move(value);
|
||||
if (!skip_callback)
|
||||
{
|
||||
// this scalar value finally, definitively replaces whatever was
|
||||
// at this slot; drop any pending duplicate-key stash entry for
|
||||
// it since it can no longer be restored (a container value at
|
||||
// this slot is resolved later, in end_object()/end_array(),
|
||||
// since skip_callback is true for the placeholder handling that
|
||||
// happens here for those)
|
||||
resolve_duplicate_key_stash(object_element, false);
|
||||
}
|
||||
return {true, object_element};
|
||||
}
|
||||
|
||||
@@ -10528,12 +10455,6 @@ class json_sax_dom_callback_parser
|
||||
std::vector<bool> key_keep_stack {}; // NOLINT(readability-redundant-member-init)
|
||||
/// helper to hold the reference for the next object element
|
||||
BasicJsonType* object_element = nullptr;
|
||||
/// stash of (slot pointer, previous value) for object members that
|
||||
/// already existed when key() was called again for the same key
|
||||
/// (duplicate keys); used to restore the previous value if the new
|
||||
/// value is later rejected by the callback, instead of erasing the
|
||||
/// member entirely
|
||||
std::vector<std::pair<BasicJsonType*, BasicJsonType>> duplicate_key_stash {};
|
||||
/// whether a syntax error occurred
|
||||
bool errored = false;
|
||||
/// callback function
|
||||
@@ -25080,7 +25001,6 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
|
||||
{
|
||||
using std::swap;
|
||||
swap(*(m_data.m_value.array), other);
|
||||
set_parents();
|
||||
}
|
||||
else
|
||||
{
|
||||
@@ -25097,7 +25017,6 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
|
||||
{
|
||||
using std::swap;
|
||||
swap(*(m_data.m_value.object), other);
|
||||
set_parents();
|
||||
}
|
||||
else
|
||||
{
|
||||
@@ -26666,139 +26585,34 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
|
||||
|
||||
case value_t::object:
|
||||
{
|
||||
// first pass: record, for every source key, whether it is
|
||||
// common to both objects (in source's iteration order) or
|
||||
// was deleted (i.e., in source but not in target) -- this is
|
||||
// a by-product of the target.find() call already needed to
|
||||
// tell the two cases apart, so it adds no extra lookups. The
|
||||
// "remove" ops themselves are emitted later, interleaved
|
||||
// with the recursive per-key diffs in the fast path below,
|
||||
// to match source's original iteration order (as the
|
||||
// original, pre-reordering-aware implementation did) instead
|
||||
// of grouping all removes before all recursive diffs.
|
||||
std::vector<typename object_t::key_type> common_keys_source_order;
|
||||
// first pass: traverse this object's elements
|
||||
for (auto it = source.cbegin(); it != source.cend(); ++it)
|
||||
{
|
||||
// escape the key name to be used in a JSON patch
|
||||
const auto path_key = detail::concat<string_t>(path, '/', detail::escape(it.key()));
|
||||
|
||||
if (target.find(it.key()) != target.end())
|
||||
{
|
||||
common_keys_source_order.push_back(it.key());
|
||||
}
|
||||
}
|
||||
|
||||
// second pass: find keys that were added (i.e., in target but
|
||||
// not in source), and record the keys common to both, in
|
||||
// target's iteration order -- again a by-product of the
|
||||
// source.find() call already needed to detect added keys. At
|
||||
// the same time, determine whether every added key comes
|
||||
// after every common key in target's order (a precondition
|
||||
// for the fast path below, which only ever appends new keys
|
||||
// at the very end): for an object_t whose iteration order is
|
||||
// a pure function of the key set (e.g. the default std::map,
|
||||
// which always iterates in sorted key order), the order
|
||||
// check further below is always true and this whole
|
||||
// mechanism is effectively a no-op; it only matters for a
|
||||
// reorderable object_t such as the one backing `ordered_json`.
|
||||
// patch ops for keys that were added (i.e., in target but not
|
||||
// in source); built here so the fast path below can reuse
|
||||
// them without a second source.find() per target key. Only
|
||||
// used by the fast path -- the slow (reordering) path
|
||||
// rebuilds "add" ops for every key itself.
|
||||
std::vector<typename object_t::key_type> common_keys_target_order;
|
||||
basic_json added_ops(value_t::array);
|
||||
bool new_keys_form_suffix = true;
|
||||
bool seen_new_key = false;
|
||||
for (auto it = target.cbegin(); it != target.cend(); ++it)
|
||||
{
|
||||
if (source.find(it.key()) == source.end())
|
||||
{
|
||||
seen_new_key = true;
|
||||
const auto path_key = detail::concat<string_t>(path, '/', detail::escape(it.key()));
|
||||
added_ops.push_back(
|
||||
{
|
||||
{"op", "add"}, {"path", path_key},
|
||||
{"value", it.value()}
|
||||
});
|
||||
// recursive call to compare object values at key it
|
||||
auto temp_diff = diff(it.value(), target[it.key()], path_key);
|
||||
result.insert(result.end(), temp_diff.begin(), temp_diff.end());
|
||||
}
|
||||
else
|
||||
{
|
||||
common_keys_target_order.push_back(it.key());
|
||||
if (seen_new_key)
|
||||
{
|
||||
new_keys_form_suffix = false;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (common_keys_source_order == common_keys_target_order && new_keys_form_suffix)
|
||||
{
|
||||
// fast path: order of common keys already matches (or the
|
||||
// object_t's iteration order does not depend on
|
||||
// insertion history), so a plain per-key recursive diff
|
||||
// is correct and minimal, as before. common_keys_source_order
|
||||
// is, by construction, the subsequence of source's keys
|
||||
// that are common to both objects, in source's iteration
|
||||
// order -- so it can be walked in lockstep with `source`
|
||||
// using a cheap key comparison instead of another lookup.
|
||||
// Deleted keys (those source keys not in common_keys_source_order)
|
||||
// are interleaved here too, in source's original order, to
|
||||
// match the historical (pre-reordering-aware) output order.
|
||||
auto common_it = common_keys_source_order.cbegin();
|
||||
for (auto it = source.cbegin(); it != source.cend(); ++it)
|
||||
{
|
||||
if (common_it != common_keys_source_order.cend() && it.key() == *common_it)
|
||||
{
|
||||
const auto path_key = detail::concat<string_t>(path, '/', detail::escape(it.key()));
|
||||
auto temp_diff = diff(it.value(), target[it.key()], path_key);
|
||||
result.insert(result.end(), temp_diff.begin(), temp_diff.end());
|
||||
++common_it;
|
||||
}
|
||||
else
|
||||
{
|
||||
// found a key that is not in target -> remove it
|
||||
const auto path_key = detail::concat<string_t>(path, '/', detail::escape(it.key()));
|
||||
result.push_back(object(
|
||||
{
|
||||
{"op", "remove"}, {"path", path_key}
|
||||
}));
|
||||
}
|
||||
}
|
||||
|
||||
// append the "add" ops for brand-new keys collected above
|
||||
// during the pass over target -- no second source.find()
|
||||
// per target key needed
|
||||
result.insert(result.end(), added_ops.begin(), added_ops.end());
|
||||
}
|
||||
else
|
||||
{
|
||||
// slow path: the common keys are in a different relative
|
||||
// order in source and target (only possible for a
|
||||
// reorderable object_t like ordered_map). Building a
|
||||
// minimal reordering patch is a nontrivial (LCS-like)
|
||||
// problem; instead, remove every source key -- both
|
||||
// deleted keys (which must be removed regardless) and
|
||||
// common keys (removed so they can be re-added in
|
||||
// target's order) -- and re-add every key that should
|
||||
// remain, with its final target value, in target's
|
||||
// order. basic_json::patch()'s "add" operation on an
|
||||
// object uses operator[], which appends at the end for a
|
||||
// vector-backed insertion-ordered map when the key does
|
||||
// not already exist -- so removing a key and then adding
|
||||
// it moves it to the end, fixing its position.
|
||||
for (auto it = source.cbegin(); it != source.cend(); ++it)
|
||||
{
|
||||
const auto path_key = detail::concat<string_t>(path, '/', detail::escape(it.key()));
|
||||
// found a key that is not in o -> remove it
|
||||
result.push_back(object(
|
||||
{
|
||||
{"op", "remove"}, {"path", path_key}
|
||||
}));
|
||||
}
|
||||
}
|
||||
|
||||
// add every key that is either common (just removed
|
||||
// above) or brand new, in target's iteration order, so
|
||||
// that the final order after applying the patch matches
|
||||
// target exactly
|
||||
for (auto it = target.cbegin(); it != target.cend(); ++it)
|
||||
// second pass: traverse other object's elements
|
||||
for (auto it = target.cbegin(); it != target.cend(); ++it)
|
||||
{
|
||||
if (source.find(it.key()) == source.end())
|
||||
{
|
||||
// found a key that is not in this -> add it
|
||||
const auto path_key = detail::concat<string_t>(path, '/', detail::escape(it.key()));
|
||||
result.push_back(
|
||||
{
|
||||
|
||||
+114
-3
@@ -38,6 +38,26 @@ class huge_binary_t : public std::vector<std::uint8_t>
|
||||
using huge_binary_json = nlohmann::basic_json <
|
||||
std::map, std::vector, std::string, bool, std::int64_t, std::uint64_t,
|
||||
double, std::allocator, nlohmann::adl_serializer, huge_binary_t, void >;
|
||||
|
||||
// a string type that reports a size beyond INT32_MAX without allocating that
|
||||
// much memory, so BSON length overflow can be tested for strings and
|
||||
// (embedded) documents as well, following the same idea as huge_binary_t
|
||||
class huge_string_t : public std::string
|
||||
{
|
||||
public:
|
||||
using std::string::string;
|
||||
huge_string_t(const std::string& s) : std::string(s) {} // NOLINT(google-explicit-constructor,hicpp-explicit-conversions)
|
||||
|
||||
size_type size() const noexcept // NOLINT(readability-convert-member-functions-to-static)
|
||||
{
|
||||
// one byte more than the BSON length field can represent
|
||||
return static_cast<size_type>((std::numeric_limits<std::int32_t>::max)()) + 1;
|
||||
}
|
||||
};
|
||||
|
||||
using huge_string_json = nlohmann::basic_json <
|
||||
std::map, std::vector, huge_string_t, bool, std::int64_t, std::uint64_t,
|
||||
double, std::allocator, nlohmann::adl_serializer, std::vector<std::uint8_t>, void >;
|
||||
} // namespace
|
||||
|
||||
TEST_CASE("BSON")
|
||||
@@ -105,10 +125,36 @@ TEST_CASE("BSON")
|
||||
|
||||
SECTION("lengths exceeding INT32_MAX cannot be serialized to BSON")
|
||||
{
|
||||
huge_binary_json j;
|
||||
j["b"] = huge_binary_json::binary(huge_binary_t{});
|
||||
// out_of_range.412 is thrown from a single shared helper
|
||||
// (to_bson_length) that guards the BSON length fields of binary
|
||||
// values, strings, and (embedded) documents alike
|
||||
SECTION("binary")
|
||||
{
|
||||
huge_binary_json j;
|
||||
j["b"] = huge_binary_json::binary(huge_binary_t{});
|
||||
|
||||
CHECK_THROWS_WITH_AS(huge_binary_json::to_bson(j), "[json.exception.out_of_range.412] BSON length 2147483661 exceeds maximum of 2147483647", huge_binary_json::out_of_range&);
|
||||
CHECK_THROWS_WITH_AS(huge_binary_json::to_bson(j), "[json.exception.out_of_range.412] BSON length 2147483661 exceeds maximum of 2147483647", huge_binary_json::out_of_range&);
|
||||
}
|
||||
|
||||
SECTION("string")
|
||||
{
|
||||
huge_string_json j;
|
||||
j["s"] = huge_string_json::string_t("value");
|
||||
|
||||
CHECK_THROWS_WITH_AS(huge_string_json::to_bson(j), "[json.exception.out_of_range.412] BSON length 4294967308 exceeds maximum of 2147483647", huge_string_json::out_of_range&);
|
||||
}
|
||||
|
||||
SECTION("document")
|
||||
{
|
||||
// an oversized string nested one level deep makes the
|
||||
// *embedded* document's own length exceed INT32_MAX as well
|
||||
huge_string_json nested;
|
||||
nested["s"] = huge_string_json::string_t("value");
|
||||
huge_string_json j;
|
||||
j["nested"] = nested;
|
||||
|
||||
CHECK_THROWS_WITH_AS(huge_string_json::to_bson(j), "[json.exception.out_of_range.412] BSON length 6442450963 exceeds maximum of 2147483647", huge_string_json::out_of_range&);
|
||||
}
|
||||
}
|
||||
|
||||
SECTION("string length must be at least 1")
|
||||
@@ -193,6 +239,23 @@ TEST_CASE("BSON")
|
||||
CHECK(json::from_bson(result, true, false) == j);
|
||||
}
|
||||
|
||||
SECTION("non-empty object with bool from a non-0/1 byte (lenient parsing)")
|
||||
{
|
||||
// documented lenient behavior (see gh-5333): any non-zero byte
|
||||
// is accepted as `true`, not just 0x01
|
||||
std::vector<std::uint8_t> const input =
|
||||
{
|
||||
0x0D, 0x00, 0x00, 0x00, // size (little endian)
|
||||
0x08, // entry: boolean
|
||||
'e', 'n', 't', 'r', 'y', '\x00',
|
||||
0x02, // value = 0x02 (neither 0x00 nor 0x01)
|
||||
0x00 // end marker
|
||||
};
|
||||
|
||||
const json expected = { { "entry", true } };
|
||||
CHECK(json::from_bson(input) == expected);
|
||||
}
|
||||
|
||||
SECTION("non-empty object with double")
|
||||
{
|
||||
json const j =
|
||||
@@ -499,6 +562,29 @@ TEST_CASE("BSON")
|
||||
CHECK(json::from_bson(result, true, false) == j);
|
||||
}
|
||||
|
||||
SECTION("array elements with non-conforming keys (lenient parsing)")
|
||||
{
|
||||
// documented lenient behavior (see gh-5333): BSON array element
|
||||
// keys are not checked against the required decimal sequence
|
||||
// "0", "1", "2", ... - elements are taken in encoded order
|
||||
std::vector<std::uint8_t> const input =
|
||||
{
|
||||
0x26, 0x00, 0x00, 0x00, // size (little endian)
|
||||
0x04, 'e', 'n', 't', 'r', 'y', '\x00', // entry: embedded array
|
||||
|
||||
0x1A, 0x00, 0x00, 0x00, // size (little endian)
|
||||
0x10, '5', 0x00, 0x0A, 0x00, 0x00, 0x00, // key "5" (bogus) -> 10
|
||||
0x10, 'x', 0x00, 0x14, 0x00, 0x00, 0x00, // key "x" (non-numeric) -> 20
|
||||
0x10, '1', 0x00, 0x1E, 0x00, 0x00, 0x00, // key "1" (out of order) -> 30
|
||||
0x00, // end marker (embedded array)
|
||||
|
||||
0x00 // end marker
|
||||
};
|
||||
|
||||
const json expected = { { "entry", json::array({10, 20, 30}) } };
|
||||
CHECK(json::from_bson(input) == expected);
|
||||
}
|
||||
|
||||
SECTION("non-empty object with binary member")
|
||||
{
|
||||
const size_t N = 10;
|
||||
@@ -594,6 +680,31 @@ TEST_CASE("BSON")
|
||||
CHECK(json::from_bson(result, true, false) == j);
|
||||
}
|
||||
|
||||
SECTION("binary member with subtype 0x02 (old binary) keeps its inner length prefix (lenient parsing)")
|
||||
{
|
||||
// documented lenient behavior (see gh-5333): the payload for
|
||||
// binary subtype 0x02 ("old binary") is returned as-is,
|
||||
// including its own inner 4-byte length prefix; it is not
|
||||
// stripped or reinterpreted
|
||||
std::vector<std::uint8_t> const input =
|
||||
{
|
||||
0x17, 0x00, 0x00, 0x00, // size (little endian)
|
||||
0x05, 'e', 'n', 't', 'r', 'y', '\x00', // entry: binary
|
||||
|
||||
0x06, 0x00, 0x00, 0x00, // size of binary (little endian)
|
||||
0x02, // "old binary" subtype
|
||||
0x02, 0x00, 0x00, 0x00, // inner length prefix (part of the old-binary payload)
|
||||
0x68, 0x69, // payload ('h', 'i')
|
||||
|
||||
0x00 // end marker
|
||||
};
|
||||
|
||||
// the inner length prefix is part of the (unmodified) payload
|
||||
const std::vector<std::uint8_t> expected_payload = {0x02, 0x00, 0x00, 0x00, 0x68, 0x69};
|
||||
const json expected = { { "entry", json::binary(expected_payload, 0x02) } };
|
||||
CHECK(json::from_bson(input) == expected);
|
||||
}
|
||||
|
||||
SECTION("Some more complex document")
|
||||
{
|
||||
json const j =
|
||||
|
||||
@@ -273,36 +273,5 @@ TEST_CASE("Regression tests for extended diagnostics")
|
||||
CHECK(j1["numbers"]["two"] == 2);
|
||||
CHECK(j1["string"] == "t");
|
||||
}
|
||||
|
||||
SECTION("Regression test - swap(array_t&)/swap(object_t&) must update JSON_DIAGNOSTICS parent pointers")
|
||||
{
|
||||
// swap(array_t&)
|
||||
{
|
||||
json j = json::array();
|
||||
json::array_t arr = {json::array({1})};
|
||||
j.swap(arr);
|
||||
|
||||
// parent pointers of the moved-in elements must point into j, not
|
||||
// into the now-defunct free-standing array_t
|
||||
CHECK_THROWS_WITH_AS(j[0][0].get<std::string>(), "[json.exception.type_error.302] (/0/0) type must be string, but is number", json::type_error);
|
||||
|
||||
// must not trigger assert_invariant() in a debug/assert-enabled build
|
||||
json const k = j;
|
||||
CHECK(k == j);
|
||||
}
|
||||
|
||||
// swap(object_t&)
|
||||
{
|
||||
json o = json::object();
|
||||
json::object_t obj = {{"a", json::array({1})}};
|
||||
o.swap(obj);
|
||||
|
||||
CHECK_THROWS_WITH_AS(o["a"][0].get<std::string>(), "[json.exception.type_error.302] (/a/0) type must be string, but is number", json::type_error);
|
||||
|
||||
// must not trigger assert_invariant() in a debug/assert-enabled build
|
||||
json const p = o;
|
||||
CHECK(p == o);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
@@ -81,84 +81,3 @@ TEST_CASE("regression test for issue #3732 - iteration_proxy_value<iter_impl<ord
|
||||
};
|
||||
static_cast<void>(fn);
|
||||
}
|
||||
|
||||
TEST_CASE("regression test - diff() must account for ordered_json member order")
|
||||
{
|
||||
SECTION("pure reorder, no value changes")
|
||||
{
|
||||
ordered_json a = {{"a", 1}, {"b", 2}};
|
||||
ordered_json b = {{"b", 2}, {"a", 1}};
|
||||
CHECK(a != b); // order-sensitive equality
|
||||
CHECK(a.patch(ordered_json::diff(a, b)) == b);
|
||||
}
|
||||
|
||||
SECTION("new key must land at the front")
|
||||
{
|
||||
ordered_json c = {{"b", 2}};
|
||||
ordered_json e = {{"a", 1}, {"b", 2}};
|
||||
CHECK(c.patch(ordered_json::diff(c, e)) == e);
|
||||
}
|
||||
|
||||
SECTION("reorder plus a value change on one of the reordered keys")
|
||||
{
|
||||
ordered_json a = {{"a", 1}, {"b", 2}};
|
||||
ordered_json b = {{"b", 20}, {"a", 1}};
|
||||
CHECK(a != b);
|
||||
CHECK(a.patch(ordered_json::diff(a, b)) == b);
|
||||
}
|
||||
|
||||
SECTION("reorder plus a deleted key")
|
||||
{
|
||||
ordered_json a = {{"a", 1}, {"b", 2}, {"c", 3}};
|
||||
ordered_json b = {{"b", 2}, {"a", 1}};
|
||||
CHECK(a != b);
|
||||
CHECK(a.patch(ordered_json::diff(a, b)) == b);
|
||||
}
|
||||
|
||||
SECTION("reorder plus a nested value that itself needs a recursive diff")
|
||||
{
|
||||
ordered_json a = {{"a", {{"x", 1}, {"y", 2}}}, {"b", 2}};
|
||||
ordered_json b = {{"b", 2}, {"a", {{"x", 1}, {"y", 99}}}};
|
||||
CHECK(a != b);
|
||||
CHECK(a.patch(ordered_json::diff(a, b)) == b);
|
||||
}
|
||||
|
||||
SECTION("three or more keys shuffled into a different order")
|
||||
{
|
||||
ordered_json a = {{"a", 1}, {"b", 2}, {"c", 3}, {"d", 4}};
|
||||
ordered_json b = {{"d", 4}, {"b", 2}, {"a", 1}, {"c", 3}};
|
||||
CHECK(a != b);
|
||||
CHECK(a.patch(ordered_json::diff(a, b)) == b);
|
||||
}
|
||||
|
||||
SECTION("matching order still produces a minimal patch (fast path unaffected)")
|
||||
{
|
||||
ordered_json a = {{"a", 1}, {"b", 2}, {"c", 3}};
|
||||
ordered_json b = {{"a", 1}, {"b", 20}, {"c", 3}};
|
||||
auto p = ordered_json::diff(a, b);
|
||||
// only the changed value should be touched, not a wholesale remove+add
|
||||
CHECK(p.size() == 1);
|
||||
CHECK(p[0]["op"] == "replace");
|
||||
CHECK(p[0]["path"] == "/b");
|
||||
CHECK(a.patch(p) == b);
|
||||
}
|
||||
|
||||
SECTION("plain json (std::map-backed) is unaffected by same-key-different-insertion-order")
|
||||
{
|
||||
json a;
|
||||
a["b"] = 2;
|
||||
a["a"] = 1;
|
||||
|
||||
json b;
|
||||
b["a"] = 1;
|
||||
b["b"] = 2;
|
||||
|
||||
// std::map iteration is always sorted by key, so a == b regardless of
|
||||
// insertion order, and diff() must still produce the same minimal
|
||||
// (empty) result as before this fix
|
||||
CHECK(a == b);
|
||||
auto p = json::diff(a, b);
|
||||
CHECK(p.empty());
|
||||
CHECK(a.patch(p) == b);
|
||||
}
|
||||
}
|
||||
|
||||
@@ -1566,75 +1566,4 @@ TEST_CASE("issue #5402 - update(merge_objects=true) overwrites a primitive with
|
||||
CHECK(mixed == json({{"keep", {{"a", 1}, {"b", 2}}}, {"replace", {{"x", 2}}}}));
|
||||
}
|
||||
|
||||
TEST_CASE("regression test - parser callback must not lose a duplicate key's prior value")
|
||||
{
|
||||
// a callback that rejects only the scalar value 2
|
||||
const json::parser_callback_t drop_value_2 = [](int /*depth*/, json::parse_event_t ev, json & v) noexcept
|
||||
{
|
||||
return !(ev == json::parse_event_t::value && v == 2);
|
||||
};
|
||||
|
||||
SECTION("duplicate key, second (scalar) value rejected - prior value is restored")
|
||||
{
|
||||
const json j = json::parse(R"({"a":1,"a":2})", drop_value_2);
|
||||
CHECK(j.dump() == "{\"a\":1}");
|
||||
}
|
||||
|
||||
SECTION("duplicate key, second value is an object rejected at object_end - prior value is restored")
|
||||
{
|
||||
const json j = json::parse(R"({"a":1,"a":{"x":2}})",
|
||||
[](int depth, json::parse_event_t ev, json& /*parsed*/) noexcept
|
||||
{
|
||||
return !(ev == json::parse_event_t::object_end && depth == 1);
|
||||
});
|
||||
CHECK(j.dump() == "{\"a\":1}");
|
||||
}
|
||||
|
||||
SECTION("duplicate key, second value is an array rejected at array_end - prior value is restored")
|
||||
{
|
||||
const json j = json::parse(R"({"a":1,"a":[9,9]})",
|
||||
[](int depth, json::parse_event_t ev, json& /*parsed*/) noexcept
|
||||
{
|
||||
return !(ev == json::parse_event_t::array_end && depth == 1);
|
||||
});
|
||||
CHECK(j.dump() == "{\"a\":1}");
|
||||
}
|
||||
|
||||
SECTION("duplicate key, second value accepted (scalar) - last value wins")
|
||||
{
|
||||
const json j = json::parse(R"({"a":1,"a":2})", [](int, json::parse_event_t, json&) noexcept
|
||||
{
|
||||
return true;
|
||||
});
|
||||
CHECK(j.dump() == "{\"a\":2}");
|
||||
}
|
||||
|
||||
SECTION("duplicate key, second value accepted (object) - last value wins")
|
||||
{
|
||||
const json j = json::parse(R"({"a":1,"a":{"x":2}})", [](int, json::parse_event_t, json&) noexcept
|
||||
{
|
||||
return true;
|
||||
});
|
||||
CHECK(j.dump() == "{\"a\":{\"x\":2}}");
|
||||
}
|
||||
|
||||
SECTION("brand new (non-duplicate) key, value rejected - member is fully absent")
|
||||
{
|
||||
const json j = json::parse(R"({"a":1,"b":2})", drop_value_2);
|
||||
CHECK(j.dump() == "{\"a\":1}");
|
||||
}
|
||||
|
||||
SECTION("duplicate key nested two levels deep")
|
||||
{
|
||||
const json j = json::parse(R"({"outer":{"a":1,"a":2}})", drop_value_2);
|
||||
CHECK(j.dump() == "{\"outer\":{\"a\":1}}");
|
||||
}
|
||||
|
||||
SECTION("three occurrences of the same key - middle rejected, last accepted")
|
||||
{
|
||||
const json j = json::parse(R"({"k":1,"k":2,"k":3})", drop_value_2);
|
||||
CHECK(j.dump() == "{\"k\":3}");
|
||||
}
|
||||
}
|
||||
|
||||
DOCTEST_CLANG_SUPPRESS_WARNING_POP
|
||||
|
||||
Reference in New Issue
Block a user