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Commits
| Author | SHA1 | Message | Date | |
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 Niels Lohmann
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bcc19dca3f |
json_view: view_mode enum instead of bool Editable, node_kind for node::kind
basic_json_document and basic_json_view take a view_mode (read_only, the default, or editable) instead of a bool: basic_json_document<json, true> did not say what true means. The shortcut aliases are unchanged. The kind of a node is a node_kind (the value_t values plus link, 10 as before), which removes the static_cast<std::uint8_t>(value_t::...) of every comparison. The node and image layouts are unchanged. Signed-off-by: Niels Lohmann <mail@nlohmann.me> |
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Niels Lohmann
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fe5e401870 |
Consolidate duplicated detail helpers and bodies (#5891) (#5901)
* Add shared detail helpers for the #5891 cleanup Add detail::is_primitive(value_t), detail::hex4_lower(), detail::utf8_shape(), detail::input_format_name(), detail::empty_input_message(), the exception ids 116, 319, 320 and 416 to detail::exception_id, and make detail::is_ascii_copyable() constexpr. Later commits switch the duplicated code over to them. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 1.4: BSON writers share one write-pass UTF-8 sanitizer (#5891) write_bson_entry_header and write_bson_string re-derived the error-handler policy differently. Both now use sanitize_utf8_for_bson_write, which treats strict like keep (the size pass already validated) and sanitizes replace/ignore into the bytes the size pass measured. No context plumbing is needed. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.1.1: one MessagePack container prefix helper (#5891) Array and object prefixes differed only in the fix marker and the 16/32-bit markers; both now delegate to write_msgpack_container_prefix. Output is byte-identical. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.1.2: one iterative walker for CBOR and MessagePack (#5891) write_cbor_iterative and write_msgpack_iterative (and their *_value_or_push helpers) were identical but for the head, scalar, and key writers. They are now one template over a small policy struct, so everything inlines. BON8 keeps its own walker (open string run, closing marker), noted in a comment. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.1.3, 2.1.8: one UBJSON container start helper, shared frame base (#5891) write_ubjson_start_array/_object are now write_ubjson_start_container<IsArray>, keeping the array-only begin()+1 scan and excessive_valueless rule. ubjson_frame derives from binary_container_frame instead of duplicating it. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.1.4: write_bytes helper for the byte-string write sites (#5891) The 13 oa.write_characters(reinterpret_cast<const CharType*>(x.data()), n) sites now call write_bytes(const void*, size_t); copy_characters sites and the buffer-based writes are untouched. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.1.5: shared object-key writer for CBOR and MessagePack (#5891) write_cbor_key and write_msgpack_key were the same SFINAE pair apart from the string/scalar writers; both now delegate to write_object_key<Walk>. UBJSON key and to_format_length stay as they are. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.3.10: writer-side format names from input_format_name (#5891) The CBOR/MessagePack/UBJSON/BSON/BJData/BON8 literals in throw_on_discarded and throw_integer_out_of_range calls now come from detail::input_format_name; the texts are identical, and UBJSON vs BJData still follows use_bjdata. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * serializer: constexpr ascii table, hex4_lower, dedupe helpers (#5891) 1.1: build ascii_copyable() at compile time from is_ascii_copyable and test find_ascii_copyable_run against it for every byte. 1.2/2.5.4: use detail::hex4_lower in both \uXXXX writers. 2.1.6: factor the repeated flush/emit blocks in dump_escaped_impl into always-inline helpers. 2.1.7: comment why the escape copy does not use put_buffer. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 1.6: use string_t-aware to_string/concat in meta() (#5891) Replaces the four std::to_string sites; rendered text unchanged. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 1.7: use detail::is_primitive in json.hpp switches (#5891) has_no_children, set_parents, max_size and the two diff walkers. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.2.1: factor insert()/iterator throw helpers (#5891) Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.2.2: share swap() overloads via swap_impl (#5891) Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.2.4: factor primitive reset and range check in erase()/range ctor (#5891) Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.2.6: share push_back array bodies via push_back_array_impl (#5891) Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.2.7: route parse/accept/sax_parse through *_impl helpers (#5891) Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.2.8: share the vector-returning to_* bodies via to_binary_vector (#5891) Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.2.10: merge destroy_string/destroy_binary into destroy_pointer (#5891) Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.4.1/1.7: exceptions: share what_impl, flatten diagnostics switch (#5891) The four create() bodies build their message through one protected static helper; the diagnostics parent walk handles array/object and ignores all other types. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.4.2/2.4.3/1.7: json_pointer: share slash and escape checks, drop primitive case lists (#5891) The leading-slash and invalid '~' escape checks are shared helpers; the reference-token walks test object and array first and treat everything else as primitive. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 1.7/2.4.9: iter_impl, iteration_proxy: drop primitive case lists, share compare preamble (#5891) Object and array stay the first branches; everything else is the primitive case. operator== and operator< share the different-container check. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.4.5/2.4.6: from_json: share get_number_value and reserve_if_possible (#5891) The three number cases of get_arithmetic_value and the arithmetic from_json share one helper (boolean stays accepted only by the latter); the array and object reserve overload pairs become one. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.4.8: ordered_map: share erase_impl between the key erase overloads (#5891) Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 1.7: json_pointer: flatten walk drops the primitive case list (#5891) Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 1.2/1.3/1.5/2.5.1/2.5.2/2.5.5: share helpers in the view code (#5891) - detail::exception_id at every numeric id; throw_* helpers take it - hex_byte, hex4_lower, utf8_shape replace local hex/table code - throw_array_index_out_of_range/_past_end, throw_key_not_found - has_native_float_format replaces the hand-written IEEE check No change of messages, ids or output. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 1.5: use utf8_shape in get_bon8_string, add exhaustive UTF-8 validator test (#5891) get_bon8_string takes the valid range of the second byte from utf8_shape() (0xF5..0xF7 stay errors, unget behavior unchanged). validate_one_utf8 keeps its if-chain (hot bulk path); the new test checks decode, validate_one_utf8, utf8_shape, json::accept and the BON8 reader against each other for every lead and second byte. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.3.1: get_cbor_sized_bytes for the CBOR chunk getters (#5891) Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.3.2: get_string_with_length for the plain-order string sites (#5891) Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.3.3, 2.3.4, 2.3.10: unsupported_key_type, empty_input_message, input_format_name in the readers (#5891) Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.3.7, 2.3.9: read_object_key and leave_container_and_check for CBOR/MessagePack/BON8 (#5891) UBJSON keys (different getter signature) and its container tail stay as is. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.3.5: json_sax_dom_error_state base for the DOM SAX parsers (#5891) Holds errored, allow_exceptions, parse_error() and is_errored(). The scalar handlers stay in each class (parse hot path). Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.3.6: table of control-character messages in the lexer (#5891) Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.3.8: finish_input helper for the strict-EOF block in the parser (#5891) sax_parse keeps its if (result) guard and return value. Also adds the clang-tidy NOLINT for the 2.3.6 message table. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.5.7: share parse_array_index between json_pointer and json_view (#5891) Move json_pointer::parse_array_index() and its status enum to namespace detail (json_pointer keeps a forwarding member), and let the json_view pointer resolution use it instead of its own copy of the RFC 6901 index grammar. Both accepted the same tokens with the same outcome. Also update the comment on detail::decode(), which listed four of the five UTF-8 validators and now points to the test that keeps them in sync. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Amalgamate (#5891) Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.4.5: keep the inlined number cases in from_json(ArithmeticType&) (#5891) Calling get_number_value() from from_json(ArithmeticType&) made GetArray<std::array<int, 1000>> 2.4x slower (it changes the inlining of the std::array conversion), so that overload keeps its own switch, with a comment. get_arithmetic_value() still uses the shared helper. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 2.5.7: force-inline detail::parse_array_index (#5891) Moving parse_array_index out of json_pointer stopped clang from inlining it into the pointer resolution (JsonPointerAt/citm_catalog +17%, JsonPointerAt/twitter +8%); JSON_HEDLEY_ALWAYS_INLINE restores the baseline. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * 1.5: keep get_bon8_string's own UTF-8 ranges (#5891) Taking the second-byte range from utf8_shape() made BON8 decoding 2-3% slower (FromBinaryShape/scalars, FromBinaryBuffer, alignment-pinned builds), so the byte path keeps its hand-written ranges. The exhaustive validator test still checks that it accepts the same sequences as the other validators. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Amalgamate (#5891) Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Fix CI failures: constexpr, NRVO, cppcheck, IWYU (#5891) - json_sax_dom_error_state::is_errored() cannot be constexpr: the class is not a literal type (GCC 4.8, GCC -Wpedantic, Clang 3.5). - to_binary_vector: destroy the vector writer before returning, as the output_vector_sink sets the size of the vector in its destructor. Without NRVO (MSVC Debug in C++14 mode), the vector was moved out before it was resized. - parser::sax_parse: return false instead of result after the early exit (cppcheck identicalConditionAfterEarlyExit). - json.hpp: export detail/exceptions.hpp for IWYU, so json_view.hpp can name exception_id without including a detail header. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Address review: throw helpers take input_format_t, simpler type checks - throw_on_discarded() and throw_integer_out_of_range() take an input_format_t and call input_format_name() themselves - has_no_children(), set_parents() and max_size() check array, then object, instead of calling is_primitive() first - parse_impl() chains like accept_impl(); sax_parse_impl() uses if/else - std::array for the control character messages; negation<> in write_object_key(); clarify the is_primitive() comment Signed-off-by: Niels Lohmann <mail@nlohmann.me> * json_view: use exception_id in the value() overloads Signed-off-by: Niels Lohmann <mail@nlohmann.me> * json_sax: assert the invariant of place_container for the static analyzer Signed-off-by: Niels Lohmann <mail@nlohmann.me> --------- Signed-off-by: Niels Lohmann <mail@nlohmann.me> |
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Niels Lohmann
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823eee3b59 |
Add editable json_documents: set, push_back, insert, and erase (#5630)
* Add editable json_documents: set, push_back, insert, and erase basic_json_document gets a second template parameter, Editable (false by default), plus the aliases json_editable_document, json_editable_view, ordered_json_editable_document and ordered_json_editable_view. Editable documents can change values and structure without rewriting the source text: set()/push_back() on values, keys, array indices and JSON pointers; insert() before an array element; erase() of an object key, array index or JSON pointer. New values and element sequences go into edit storage that the document owns and never moves, so views keep referring to their value across edits and a parsed node never moves. Read-only documents walk the plain node array and are unaffected. Strings are checked for UTF-8 on entry, so dump() of an editable document never throws type_error.316. Binary values cannot be stored (type_error.319). A seeded differential test applies random edits to an editable document and to the equivalent ordered_json and compares both after every step. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Fix old clang and MSVC C4127 in editable json documents Value-initialize the const std::less in find_parent (clang 3.4/3.6 do not implement DR 253), and test the Editable template argument through a function to avoid MSVC C4127. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Copy nested values into a document without recursion Counting and copying the nodes of a view or a basic_json value into an editable document recursed once per nesting level, so that a deeply nested value overflowed the stack. The four functions now walk the value with an explicit stack, as materialize() does. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Do not leave a half-assigned container when set_moved() throws assign() rewrote the kind, length and extent of a slot before set_moved() registered its new element sequence. set_moved() can throw (std::bad_alloc from reserving the bookkeeping vectors) for a slot that is not moved yet, which left a container without the moved flag that showed its old children. The bookkeeping is now reserved first (reserve_moved()), so that nothing after the first write to the slot can throw. block_of() reserves before it marks anything for the same reason. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Check strings copied from another document for valid UTF-8 An editable document only holds valid UTF-8, but copy_scalar() copied the strings and keys of a view of another document unchecked. A document of a weaker check (or a borrowed text that changed after parsing) could therefore bring ill-formed UTF-8 into it. The copy is checked now, with the error that dump() reports for the string; copies within the same document stay unchecked. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Allow the edit arena to grow up to 4 GiB - 1 bytes append_text() doubled the capacity of the arena and rejected the result if it exceeded 4 GiB, so that an arena of more than 2 GiB could not grow even though the 32-bit offsets of nodes address 4 GiB - 1 bytes. The capacity is now clamped to that limit (text_capacity()), and an append is rejected only if the bytes themselves do not fit. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Set a null value below a pointer as basic_json does set(json_pointer, value) turned a null parent into an object for every last reference token, so "/a/0" and "/a/-" below {"a":null} made {"a":{"0":1}}, where basic_json's operator[](json_pointer) makes an array. A null parent now becomes an array for "-" and for digit tokens (filled with nulls up to the index) and an object otherwise. An invalid index is reported before the parent changes. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Replace a container by a scalar in constant time once it is linked Replacing an array or object that spans several nodes by a scalar looks up its parent from the root (find_parent), which is linear in the size of the document: setting every element of a 20,000 element array took more than half a second. The parent only has to switch to links once; afterward the extent of the replaced value no longer matters. Nodes that an entry of a moved sequence links to are now marked (node_flags::linked), and assign() skips the lookup for them. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Update the json_view banner and type_error.319 for editable documents The banner still described a read-only view, and the documentation of type_error.319 listed set and push_back only, although insert rejects binary values as well. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Assign the member that lookups find when set() meets duplicate keys An editable document reads the last member of a repeated key (as the read-only document does), but set(object, key, value) assigned the first one: a view taken from object[key] before the call did not show the new value. It now assigns the last member's value, keeps the key at the position of its first occurrence (where materialize() puts it), and drops the other members. The seeded differential test now also edits documents whose objects repeat keys and compares every lookup (operator[], at, find, value, contains, count, and JSON pointers) with the parsed basic_json value. A targeted test covers duplicates before and after edits that move the object, in large objects with an index, in moved arrays, and in values copied from other documents. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Assign the first member when set() meets duplicate keys again Lookups find the first member of a repeated key again, so set(object, key, value) assigns that member (keeping the key where it is) and drops the others, as documented before, and a view taken from object[key] shows the new value. This undoes the code and documentation changes of |