simdjson  3.6.3
Ridiculously Fast JSON
parser.h
1 #ifndef SIMDJSON_DOM_PARSER_H
2 #define SIMDJSON_DOM_PARSER_H
3 
4 #include "simdjson/dom/base.h"
5 #include "simdjson/dom/document.h"
6 
7 namespace simdjson {
8 
9 namespace dom {
10 
30 class parser {
31 public:
43  simdjson_inline explicit parser(size_t max_capacity = SIMDJSON_MAXSIZE_BYTES) noexcept;
49  simdjson_inline parser(parser &&other) noexcept;
50  parser(const parser &) = delete;
56  simdjson_inline parser &operator=(parser &&other) noexcept;
57  parser &operator=(const parser &) = delete;
58 
60  ~parser()=default;
61 
96  inline simdjson_result<element> load(const std::string &path) & noexcept;
97  inline simdjson_result<element> load(const std::string &path) && = delete ;
165  inline simdjson_result<element> parse(const uint8_t *buf, size_t len, bool realloc_if_needed = true) & noexcept;
166  inline simdjson_result<element> parse(const uint8_t *buf, size_t len, bool realloc_if_needed = true) && =delete;
168  simdjson_inline simdjson_result<element> parse(const char *buf, size_t len, bool realloc_if_needed = true) & noexcept;
169  simdjson_inline simdjson_result<element> parse(const char *buf, size_t len, bool realloc_if_needed = true) && =delete;
171  simdjson_inline simdjson_result<element> parse(const std::string &s) & noexcept;
172  simdjson_inline simdjson_result<element> parse(const std::string &s) && =delete;
174  simdjson_inline simdjson_result<element> parse(const padded_string &s) & noexcept;
175  simdjson_inline simdjson_result<element> parse(const padded_string &s) && =delete;
177  simdjson_inline simdjson_result<element> parse(const padded_string_view &v) & noexcept;
178  simdjson_inline simdjson_result<element> parse(const padded_string_view &v) && =delete;
179 
181  simdjson_inline simdjson_result<element> parse(const char *buf) noexcept = delete;
182 
227  inline simdjson_result<element> parse_into_document(document& doc, const uint8_t *buf, size_t len, bool realloc_if_needed = true) & noexcept;
228  inline simdjson_result<element> parse_into_document(document& doc, const uint8_t *buf, size_t len, bool realloc_if_needed = true) && =delete;
230  simdjson_inline simdjson_result<element> parse_into_document(document& doc, const char *buf, size_t len, bool realloc_if_needed = true) & noexcept;
231  simdjson_inline simdjson_result<element> parse_into_document(document& doc, const char *buf, size_t len, bool realloc_if_needed = true) && =delete;
233  simdjson_inline simdjson_result<element> parse_into_document(document& doc, const std::string &s) & noexcept;
234  simdjson_inline simdjson_result<element> parse_into_document(document& doc, const std::string &s) && =delete;
236  simdjson_inline simdjson_result<element> parse_into_document(document& doc, const padded_string &s) & noexcept;
237  simdjson_inline simdjson_result<element> parse_into_document(document& doc, const padded_string &s) && =delete;
238 
240  simdjson_inline simdjson_result<element> parse_into_document(document& doc, const char *buf) noexcept = delete;
241 
317  inline simdjson_result<document_stream> load_many(const std::string &path, size_t batch_size = dom::DEFAULT_BATCH_SIZE) noexcept;
318 
415  inline simdjson_result<document_stream> parse_many(const uint8_t *buf, size_t len, size_t batch_size = dom::DEFAULT_BATCH_SIZE) noexcept;
417  inline simdjson_result<document_stream> parse_many(const char *buf, size_t len, size_t batch_size = dom::DEFAULT_BATCH_SIZE) noexcept;
419  inline simdjson_result<document_stream> parse_many(const std::string &s, size_t batch_size = dom::DEFAULT_BATCH_SIZE) noexcept;
420  inline simdjson_result<document_stream> parse_many(const std::string &&s, size_t batch_size) = delete;// unsafe
422  inline simdjson_result<document_stream> parse_many(const padded_string &s, size_t batch_size = dom::DEFAULT_BATCH_SIZE) noexcept;
423  inline simdjson_result<document_stream> parse_many(const padded_string &&s, size_t batch_size) = delete;// unsafe
424 
426  simdjson_result<document_stream> parse_many(const char *buf, size_t batch_size = dom::DEFAULT_BATCH_SIZE) noexcept = delete;
427 
436  simdjson_warn_unused inline error_code allocate(size_t capacity, size_t max_depth = DEFAULT_MAX_DEPTH) noexcept;
437 
438 #ifndef SIMDJSON_DISABLE_DEPRECATED_API
450  [[deprecated("Use allocate() instead.")]]
451  simdjson_warn_unused inline bool allocate_capacity(size_t capacity, size_t max_depth = DEFAULT_MAX_DEPTH) noexcept;
452 #endif // SIMDJSON_DISABLE_DEPRECATED_API
458  simdjson_inline size_t capacity() const noexcept;
459 
467  simdjson_inline size_t max_capacity() const noexcept;
468 
474  simdjson_inline size_t max_depth() const noexcept;
475 
490  simdjson_inline void set_max_capacity(size_t max_capacity) noexcept;
491 
492 #ifdef SIMDJSON_THREADS_ENABLED
498  bool threaded{true};
499 #endif
501  class Iterator;
503  using InvalidJSON [[deprecated("Use simdjson_error instead")]] = simdjson_error;
504 
506  std::unique_ptr<internal::dom_parser_implementation> implementation{};
507 
509  bool valid{false};
511  error_code error{UNINITIALIZED};
512 
514  document doc{};
515 
517  [[deprecated("Use the result of parser.parse() instead")]]
518  inline bool is_valid() const noexcept;
519 
524  [[deprecated("Use the result of parser.parse() instead")]]
525  inline int get_error_code() const noexcept;
526 
528  [[deprecated("Use error_message() on the result of parser.parse() instead, or cout << error")]]
529  inline std::string get_error_message() const noexcept;
530 
532  [[deprecated("Use cout << on the result of parser.parse() instead")]]
533  inline bool print_json(std::ostream &os) const noexcept;
534 
536  inline bool dump_raw_tape(std::ostream &os) const noexcept;
537 
538 
539 private:
545  size_t _max_capacity;
546 
550  std::unique_ptr<char[]> loaded_bytes;
551 
553  size_t _loaded_bytes_capacity{0};
554 
555  // all nodes are stored on the doc.tape using a 64-bit word.
556  //
557  // strings, double and ints are stored as
558  // a 64-bit word with a pointer to the actual value
559  //
560  //
561  //
562  // for objects or arrays, store [ or { at the beginning and } and ] at the
563  // end. For the openings ([ or {), we annotate them with a reference to the
564  // location on the doc.tape of the end, and for then closings (} and ]), we
565  // annotate them with a reference to the location of the opening
566  //
567  //
568 
574  inline error_code ensure_capacity(size_t desired_capacity) noexcept;
580  inline error_code ensure_capacity(document& doc, size_t desired_capacity) noexcept;
581 
583  inline simdjson_result<size_t> read_file(const std::string &path) noexcept;
584 
585  friend class parser::Iterator;
586  friend class document_stream;
587 
588 
589 }; // class parser
590 
591 } // namespace dom
592 } // namespace simdjson
593 
594 #endif // SIMDJSON_DOM_PARSER_H
A parsed JSON document.
Definition: document.h:16
A persistent document parser.
Definition: parser.h:30
simdjson_inline parser(size_t max_capacity=SIMDJSON_MAXSIZE_BYTES) noexcept
Create a JSON parser.
Definition: parser-inl.h:23
simdjson_result< element > parse(const uint8_t *buf, size_t len, bool realloc_if_needed=true) &noexcept
Parse a JSON document and return a temporary reference to it.
Definition: parser-inl.h:149
simdjson_result< element > parse_into_document(document &doc, const uint8_t *buf, size_t len, bool realloc_if_needed=true) &noexcept
Parse a JSON document into a provide document instance and return a temporary reference to it.
Definition: parser-inl.h:109
simdjson_inline size_t max_depth() const noexcept
The maximum level of nested object and arrays supported by this parser.
Definition: parser-inl.h:190
simdjson_inline parser(parser &&other) noexcept
Take another parser's buffers and state.
simdjson_result< document_stream > load_many(const std::string &path, size_t batch_size=dom::DEFAULT_BATCH_SIZE) noexcept
Load a file containing many JSON documents.
Definition: parser-inl.h:101
simdjson_inline void set_max_capacity(size_t max_capacity) noexcept
Set max_capacity.
Definition: parser-inl.h:243
simdjson_inline size_t max_capacity() const noexcept
The largest document this parser can automatically support.
Definition: parser-inl.h:187
simdjson_result< element > load(const std::string &path) &noexcept
Load a JSON document from a file and return a reference to it.
Definition: parser-inl.h:94
~parser()=default
Deallocate the JSON parser.
simdjson_inline size_t capacity() const noexcept
The largest document this parser can support without reallocating.
Definition: parser-inl.h:184
simdjson_inline parser & operator=(parser &&other) noexcept
Take another parser's buffers and state.
simdjson_warn_unused error_code allocate(size_t capacity, size_t max_depth=DEFAULT_MAX_DEPTH) noexcept
Ensure this parser has enough memory to process JSON documents up to capacity bytes in length and max...
Definition: parser-inl.h:195
simdjson_result< document_stream > parse_many(const uint8_t *buf, size_t len, size_t batch_size=dom::DEFAULT_BATCH_SIZE) noexcept
Parse a buffer containing many JSON documents.
Definition: parser-inl.h:166
An implementation of simdjson for a particular CPU architecture.
User-provided string that promises it has extra padded bytes at the end for use with parser::parse().
The top level simdjson namespace, containing everything the library provides.
Definition: base.h:8
constexpr SIMDJSON_PUSH_DISABLE_UNUSED_WARNINGS size_t SIMDJSON_MAXSIZE_BYTES
The maximum document size supported by simdjson.
Definition: base.h:21
const char * error_message(error_code error) noexcept
It is the convention throughout the code that the macro SIMDJSON_DEVELOPMENT_CHECKS determines whethe...
Definition: error-inl.h:20
constexpr size_t DEFAULT_MAX_DEPTH
By default, simdjson supports this many nested objects and arrays.
Definition: base.h:38
error_code
All possible errors returned by simdjson.
Definition: error.h:19
@ UNINITIALIZED
unknown error, or uninitialized document
Definition: error.h:31
String with extra allocation for ease of use with parser::parse()
Definition: padded_string.h:23
Exception thrown when an exception-supporting simdjson method is called.
Definition: error.h:81
The result of a simdjson operation that could fail.
Definition: error.h:214