python-rapidjson/rapidjson.cpp at master · manishgit138/python-rapidjson · GitHub

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// -*- coding: utf-8 -*-

// :Project: python-rapidjson -- Python extension module

// :Author: Ken Robbins <ken@kenrobbins.com>

// :License: MIT License

#include <Python.h>

#include <datetime.h>

#include <structmember.h>

#include <algorithm>

#include <cmath>

#include <string>

#include <vector>

#include "rapidjson/reader.h"

#include "rapidjson/schema.h"

#include "rapidjson/stringbuffer.h"

#include "rapidjson/writer.h"

#include "rapidjson/prettywriter.h"

#include "rapidjson/error/en.h"

using namespace rapidjson;

/* On some MacOS combo, using Py_IS_XXX() macros does not work (see

https://github.com/python-rapidjson/python-rapidjson/issues/78).

OTOH, MSVC < 2015 does not have std::isxxx() (see

https://stackoverflow.com/questions/38441740/where-is-isnan-in-msvc-2010).

Oh well... */

#if defined (_MSC_VER) && (_MSC_VER < 1900)

#define IS_NAN(x) Py_IS_NAN(x)

#define IS_INF(x) Py_IS_INFINITY(x)

#else

#define IS_NAN(x) std::isnan(x)

#define IS_INF(x) std::isinf(x)

#endif

static PyObject* decimal_type = NULL;

static PyObject* timezone_type = NULL;

static PyObject* timezone_utc = NULL;

static PyObject* uuid_type = NULL;

static PyObject* validation_error = NULL;

static PyObject* decode_error = NULL;

/* These are the names of oftenly used methods or literal values, interned in the module

initialization function, to avoid repeated creation/destruction of PyUnicode values

from plain C strings.

We cannot use _Py_IDENTIFIER() because that upsets the GNU C++ compiler in -pedantic

mode. */

static PyObject* astimezone_name = NULL;

static PyObject* hex_name = NULL;

static PyObject* timestamp_name = NULL;

static PyObject* total_seconds_name = NULL;

static PyObject* utcoffset_name = NULL;

static PyObject* is_infinite_name = NULL;

static PyObject* is_nan_name = NULL;

static PyObject* start_object_name = NULL;

static PyObject* end_object_name = NULL;

static PyObject* default_name = NULL;

static PyObject* end_array_name = NULL;

static PyObject* string_name = NULL;

static PyObject* read_name = NULL;

static PyObject* write_name = NULL;

static PyObject* encoding_name = NULL;

static PyObject* minus_inf_string_value = NULL;

static PyObject* nan_string_value = NULL;

static PyObject* plus_inf_string_value = NULL;

struct HandlerContext {

PyObject* object;

const char* key;

SizeType keyLength;

bool isObject;

bool keyValuePairs;

bool copiedKey;

};

enum DatetimeMode {

DM_NONE = 0,

// Formats

DM_ISO8601 = 1<<0, // Bidirectional ISO8601 for datetimes, dates and times

DM_UNIX_TIME = 1<<1, // Serialization only, "Unix epoch"-based number of seconds

// Options

DM_ONLY_SECONDS = 1<<4, // Truncate values to the whole second, ignoring micro seconds

DM_IGNORE_TZ = 1<<5, // Ignore timezones

DM_NAIVE_IS_UTC = 1<<6, // Assume naive datetime are in UTC timezone

DM_SHIFT_TO_UTC = 1<<7, // Shift to/from UTC

DM_MAX = 1<<8

};

#define DATETIME_MODE_FORMATS_MASK 0x0f // 0b00001111 in C++14

static inline int

datetime_mode_format(unsigned mode) {

return mode & DATETIME_MODE_FORMATS_MASK;

}

static inline bool

valid_datetime_mode(int mode) {

int format = datetime_mode_format(mode);

return (mode >= 0 && mode < DM_MAX

&& (format <= DM_UNIX_TIME)

&& (mode == 0 || format > 0));

}

static int

days_per_month(int year, int month) {

assert(month >= 1);

assert(month <= 12);

if (month == 1 || month == 3 || month == 5 || month == 7

|| month == 8 || month == 10 || month == 12) {

return 31;

} else if (month == 4 || month == 6 || month == 9 || month == 11) {

return 30;

} else if (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)) {

return 29;

} else {

return 28;

}

enum UuidMode {

UM_NONE = 0,

UM_CANONICAL = 1<<0, // 4-dashed 32 hex chars: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx

UM_HEX = 1<<1, // canonical OR 32 hex chars in a row

UM_MAX = 1<<2

};

enum NumberMode {

NM_NONE = 0,

NM_NAN = 1<<0, // allow "not-a-number" values

NM_DECIMAL = 1<<1, // serialize Decimal instances, deserialize floats as Decimal

NM_NATIVE = 1<<2, // use faster native C library number handling

NM_MAX = 1<<3

};

enum BytesMode {

BM_NONE = 0,

BM_UTF8 = 1<<0, // try to convert to UTF-8

BM_MAX = 1<<1

};

enum ParseMode {

PM_NONE = 0,

PM_COMMENTS = 1<<0, // Allow one-line // ... and multi-line /* ... */ comments

PM_TRAILING_COMMAS = 1<<1, // allow trailing commas at the end of objects and arrays

PM_MAX = 1<<2

};

enum WriteMode {

WM_COMPACT = 0,

WM_PRETTY = 1<<0, // Use PrettyWriter

WM_SINGLE_LINE_ARRAY = 1<<1, // Format arrays on a single line

WM_MAX = 1<<2

};

enum IterableMode {

IM_ANY_ITERABLE = 0, // Default, any iterable is dumped as JSON array

IM_ONLY_LISTS = 1<<0, // Only list instances are dumped as JSON arrays

IM_MAX = 1<<1

};

enum MappingMode {

MM_ANY_MAPPING = 0, // Default, any mapping is dumped as JSON object

MM_ONLY_DICTS = 1<<0, // Only dict instances are dumped as JSON objects

MM_COERCE_KEYS_TO_STRINGS = 1<<1, // Convert keys to strings

MM_SKIP_NON_STRING_KEYS = 1<<2, // Ignore non-string keys

MM_SORT_KEYS = 1<<3, // Sort keys

MM_MAX = 1<<4

};

//////////////////////////

// Forward declarations //

//////////////////////////

static PyObject* do_decode(PyObject* decoder,

const char* jsonStr, Py_ssize_t jsonStrlen,

PyObject* jsonStream, size_t chunkSize,

PyObject* objectHook,

unsigned numberMode, unsigned datetimeMode,

unsigned uuidMode, unsigned parseMode);

static PyObject* decoder_call(PyObject* self, PyObject* args, PyObject* kwargs);

static PyObject* decoder_new(PyTypeObject* type, PyObject* args, PyObject* kwargs);

static PyObject* do_encode(PyObject* value, PyObject* defaultFn, bool ensureAscii,

unsigned writeMode, char indentChar, unsigned indentCount,

unsigned numberMode, unsigned datetimeMode,

unsigned uuidMode, unsigned bytesMode,

unsigned iterableMode, unsigned mappingMode);

static PyObject* do_stream_encode(PyObject* value, PyObject* stream, size_t chunkSize,

PyObject* defaultFn, bool ensureAscii,

unsigned writeMode, char indentChar,

unsigned indentCount, unsigned numberMode,

unsigned datetimeMode, unsigned uuidMode,

unsigned bytesMode, unsigned iterableMode,

unsigned mappingMode);

static PyObject* encoder_call(PyObject* self, PyObject* args, PyObject* kwargs);

static PyObject* encoder_new(PyTypeObject* type, PyObject* args, PyObject* kwargs);

static PyObject* validator_call(PyObject* self, PyObject* args, PyObject* kwargs);

static void validator_dealloc(PyObject* self);

static PyObject* validator_new(PyTypeObject* type, PyObject* args, PyObject* kwargs);

///////////////////////////////////////////////////

// Stream wrapper around Python file-like object //

///////////////////////////////////////////////////

class PyReadStreamWrapper {

public:

typedef char Ch;

PyReadStreamWrapper(PyObject* stream, size_t size)

: stream(stream) {

Py_INCREF(stream);

chunkSize = PyLong_FromUnsignedLong(size);

buffer = NULL;

chunk = NULL;

chunkLen = 0;

pos = 0;

offset = 0;

eof = false;

}

~PyReadStreamWrapper() {

Py_CLEAR(stream);

Py_CLEAR(chunkSize);

Py_CLEAR(chunk);

}

Ch Peek() {

if (!eof && pos == chunkLen) {

Read();

}

return eof ? '\0' : buffer[pos];

}

Ch Take() {

if (!eof && pos == chunkLen) {

Read();

}

return eof ? '\0' : buffer[pos++];

}

size_t Tell() const {

return offset + pos;

}

void Flush() {

assert(false);

}

void Put(Ch c) {

assert(false);

}

Ch* PutBegin() {

assert(false);

return 0;

}

size_t PutEnd(Ch* begin) {

assert(false);

return 0;

}

private:

void Read() {

Py_CLEAR(chunk);

chunk = PyObject_CallMethodObjArgs(stream, read_name, chunkSize, NULL);

if (chunk == NULL) {

eof = true;

} else {

Py_ssize_t len;

if (PyBytes_Check(chunk)) {

len = PyBytes_GET_SIZE(chunk);

buffer = PyBytes_AS_STRING(chunk);

} else {

buffer = PyUnicode_AsUTF8AndSize(chunk, &len);

if (buffer == NULL) {

len = 0;

}

if (len == 0) {

eof = true;

} else {

offset += chunkLen;

chunkLen = len;

pos = 0;

}

PyObject* stream;

PyObject* chunkSize;

PyObject* chunk;

const Ch* buffer;

size_t chunkLen;

size_t pos;

size_t offset;

bool eof;

};

class PyWriteStreamWrapper {

public:

typedef char Ch;

PyWriteStreamWrapper(PyObject* stream, size_t size)

: stream(stream) {

Py_INCREF(stream);

buffer = (char*) PyMem_Malloc(size);

assert(buffer);

bufferEnd = buffer + size;

cursor = buffer;

multiByteChar = NULL;

isBinary = !PyObject_HasAttr(stream, encoding_name);

}

~PyWriteStreamWrapper() {

Py_CLEAR(stream);

PyMem_Free(buffer);

}

Ch Peek() {

assert(false);

return 0;

}

Ch Take() {

assert(false);

return 0;

}

size_t Tell() const {

assert(false);

return 0;

}

void Flush() {

PyObject* c;

if (isBinary) {

c = PyBytes_FromStringAndSize(buffer, (size_t)(cursor - buffer));

cursor = buffer;

} else {

if (multiByteChar == NULL) {

c = PyUnicode_FromStringAndSize(buffer, (size_t)(cursor - buffer));

cursor = buffer;

} else {

size_t complete = (size_t)(multiByteChar - buffer);

c = PyUnicode_FromStringAndSize(buffer, complete);

size_t remaining = (size_t)(cursor - multiByteChar);

if (RAPIDJSON_LIKELY(remaining < complete))

memcpy(buffer, multiByteChar, remaining);

else

std::memmove(buffer, multiByteChar, remaining);

cursor = buffer + remaining;

multiByteChar = NULL;

}

if (c == NULL) {

// Propagate the error state, it will be catched by dumps_internal()

} else {

PyObject* res = PyObject_CallMethodObjArgs(stream, write_name, c, NULL);

if (res == NULL) {

// Likewise

} else {

Py_DECREF(res);

}

Py_DECREF(c);

}

void Put(Ch c) {

if (cursor == bufferEnd)

Flush();

if (!isBinary) {

if ((c & 0x80) == 0) {

multiByteChar = NULL;

} else if (c & 0x40) {

multiByteChar = cursor;

}

*cursor++ = c;

}

Ch* PutBegin() {

assert(false);

return 0;

}

size_t PutEnd(Ch* begin) {

assert(false);

return 0;

}

private:

PyObject* stream;

Ch* buffer;

Ch* bufferEnd;

Ch* cursor;

Ch* multiByteChar;

bool isBinary;

};

inline void PutUnsafe(PyWriteStreamWrapper& stream, char c) {

stream.Put(c);

}

/////////////

// RawJSON //

/////////////

typedef struct {

PyObject_HEAD

PyObject* value;

} RawJSON;

static void

RawJSON_dealloc(RawJSON* self)

{

Py_XDECREF(self->value);

Py_TYPE(self)->tp_free((PyObject*) self);

}

static PyObject*

RawJSON_new(PyTypeObject* type, PyObject* args, PyObject* kwds)

{

PyObject* self = type->tp_alloc(type, 0);

static char const* kwlist[] = {

"value",

NULL

};

PyObject* value = NULL;

if (!PyArg_ParseTupleAndKeywords(args, kwds, "U", (char**) kwlist, &value))

return NULL;

((RawJSON*) self)->value = value;

Py_INCREF(value);

return self;

}

static PyMemberDef RawJSON_members[] = {

{"value",

T_OBJECT_EX, offsetof(RawJSON, value), READONLY,

"string representing a serialized JSON object"},

{NULL} /* Sentinel */

};

PyDoc_STRVAR(rawjson_doc,

"Raw (preserialized) JSON object\n"

"\n"

"When rapidjson tries to serialize instances of this class, it will"

" use their literal `value`. For instance:\n"

">>> rapidjson.dumps(RawJSON('{\"already\": \"serialized\"}'))\n"

"'{\"already\": \"serialized\"}'");

static PyTypeObject RawJSON_Type = {

PyVarObject_HEAD_INIT(NULL, 0)

"rapidjson.RawJSON", /* tp_name */

sizeof(RawJSON), /* tp_basicsize */

0, /* tp_itemsize */

(destructor) RawJSON_dealloc, /* tp_dealloc */

0, /* tp_print */

0, /* tp_getattr */

0, /* tp_setattr */

0, /* tp_compare */

0, /* tp_repr */

0, /* tp_as_number */

0, /* tp_as_sequence */

0, /* tp_as_mapping */

0, /* tp_hash */

0, /* tp_call */

0, /* tp_str */

0, /* tp_getattro */

0, /* tp_setattro */

0, /* tp_as_buffer */

Py_TPFLAGS_DEFAULT, /* tp_flags */

rawjson_doc, /* tp_doc */

0, /* tp_traverse */

0, /* tp_clear */

0, /* tp_richcompare */

0, /* tp_weaklistoffset */

0, /* tp_iter */

0, /* tp_iternext */

0, /* tp_methods */

RawJSON_members, /* tp_members */

0, /* tp_getset */

0, /* tp_base */

0, /* tp_dict */

0, /* tp_descr_get */

0, /* tp_descr_set */

0, /* tp_dictoffset */

0, /* tp_init */

0, /* tp_alloc */

RawJSON_new, /* tp_new */

};

static bool

accept_indent_arg(PyObject* arg, unsigned &write_mode, unsigned &indent_count,

char &indent_char)

{

if (arg != NULL && arg != Py_None) {

write_mode = WM_PRETTY;

if (PyLong_Check(arg) && PyLong_AsLong(arg) >= 0) {

indent_count = PyLong_AsUnsignedLong(arg);

} else if (PyUnicode_Check(arg)) {

Py_ssize_t len;

const char* indentStr = PyUnicode_AsUTF8AndSize(arg, &len);

indent_count = len;

if (indent_count) {

indent_char = '\0';

while (len--) {

char ch = indentStr[len];

if (ch == '\n' || ch == ' ' || ch == '\t' || ch == '\r') {

if (indent_char == '\0') {

indent_char = ch;

} else if (indent_char != ch) {

PyErr_SetString(

PyExc_TypeError,

"indent string cannot contains different chars");

return false;

}

} else {

PyErr_SetString(PyExc_TypeError,

"non-whitespace char in indent string");

return false;

}

} else {

PyErr_SetString(PyExc_TypeError,

"indent must be a non-negative int or a string");

return false;

}

return true;

}

static bool

accept_write_mode_arg(PyObject* arg, unsigned &write_mode)

{

if (arg != NULL && arg != Py_None) {

if (PyLong_Check(arg)) {

long mode = PyLong_AsLong(arg);

if (mode < 0 || mode >= WM_MAX) {

PyErr_SetString(PyExc_ValueError, "Invalid write_mode");

return false;

}

if (mode == WM_COMPACT) {

write_mode = WM_COMPACT;

} else if (mode & WM_SINGLE_LINE_ARRAY) {

write_mode = (unsigned) (write_mode | WM_SINGLE_LINE_ARRAY);

}

} else {

PyErr_SetString(PyExc_TypeError,

"write_mode must be a non-negative int");

return false;

}

return true;

}

static bool

accept_number_mode_arg(PyObject* arg, int allow_nan, unsigned &number_mode)

{

if (arg != NULL) {

if (arg == Py_None)

number_mode = NM_NONE;

else if (PyLong_Check(arg)) {

long mode = PyLong_AsLong(arg);

if (mode < 0 || mode >= NM_MAX) {

PyErr_SetString(PyExc_ValueError, "Invalid number_mode, out of range");

return false;

}

number_mode = (unsigned) mode;

} else {

PyErr_SetString(PyExc_TypeError,

"number_mode must be a non-negative int");

return false;

}

if (allow_nan != -1) {

if (allow_nan)

number_mode |= NM_NAN;

else

number_mode &= ~NM_NAN;

}

return true;

}

static bool

accept_datetime_mode_arg(PyObject* arg, unsigned &datetime_mode)

{

if (arg != NULL && arg != Py_None) {

if (PyLong_Check(arg)) {

long mode = PyLong_AsLong(arg);

if (!valid_datetime_mode(mode)) {

PyErr_SetString(PyExc_ValueError, "Invalid datetime_mode, out of range");

return false;

}

datetime_mode = (unsigned) mode;

} else {

PyErr_SetString(PyExc_TypeError,

"datetime_mode must be a non-negative int");

return false;

}

return true;

}

static bool

accept_uuid_mode_arg(PyObject* arg, unsigned &uuid_mode)

{

if (arg != NULL && arg != Py_None) {

if (PyLong_Check(arg)) {

long mode = PyLong_AsLong(arg);

if (mode < 0 || mode >= UM_MAX) {

PyErr_SetString(PyExc_ValueError, "Invalid uuid_mode, out of range");

return false;

}

uuid_mode = (unsigned) mode;

} else {

PyErr_SetString(PyExc_TypeError, "uuid_mode must be a non-negative int");

return false;

}

return true;

}

static bool

accept_bytes_mode_arg(PyObject* arg, unsigned &bytes_mode)

{

if (arg != NULL && arg != Py_None) {

if (PyLong_Check(arg)) {

long mode = PyLong_AsLong(arg);

if (mode < 0 || mode >= BM_MAX) {

PyErr_SetString(PyExc_ValueError, "Invalid bytes_mode, out of range");

return false;

}

bytes_mode = (unsigned) mode;

} else {

PyErr_SetString(PyExc_TypeError, "bytes_mode must be a non-negative int");

return false;

}

return true;

}

static bool

accept_iterable_mode_arg(PyObject* arg, unsigned &iterable_mode)

{

if (arg != NULL && arg != Py_None) {

if (PyLong_Check(arg)) {

long mode = PyLong_AsLong(arg);

if (mode < 0 || mode >= IM_MAX) {

PyErr_SetString(PyExc_ValueError, "Invalid iterable_mode, out of range");

return false;

}

iterable_mode = (unsigned) mode;

} else {

PyErr_SetString(PyExc_TypeError, "iterable_mode must be a non-negative int");

return false;

}

return true;

}

static bool

accept_mapping_mode_arg(PyObject* arg, unsigned &mapping_mode)

{

if (arg != NULL && arg != Py_None) {

if (PyLong_Check(arg)) {

long mode = PyLong_AsLong(arg);

if (mode < 0 || mode >= MM_MAX) {

PyErr_SetString(PyExc_ValueError, "Invalid mapping_mode, out of range");

return false;

}

mapping_mode = (unsigned) mode;

} else {

PyErr_SetString(PyExc_TypeError, "mapping_mode must be a non-negative int");

return false;

}

return true;

}

static bool

accept_chunk_size_arg(PyObject* arg, size_t &chunk_size)

{

if (arg != NULL && arg != Py_None) {

if (PyLong_Check(arg)) {

Py_ssize_t size = PyNumber_AsSsize_t(arg, PyExc_ValueError);

if (PyErr_Occurred() || size < 4 || size > UINT_MAX) {

PyErr_SetString(PyExc_ValueError, "Invalid chunk_size, out of range");

return false;

}

chunk_size = (size_t) size;

} else {

PyErr_SetString(PyExc_TypeError,

"chunk_size must be a non-negative int");

return false;

}

return true;

}

static bool

accept_parse_mode_arg(PyObject* arg, unsigned &parse_mode)

{

if (arg != NULL && arg != Py_None) {

if (PyLong_Check(arg)) {

long mode = PyLong_AsLong(arg);

if (mode < 0 || mode >= PM_MAX) {

PyErr_SetString(PyExc_ValueError, "Invalid parse_mode, out of range");

return false;

}

parse_mode = (unsigned) mode;

} else {

PyErr_SetString(PyExc_TypeError,

"parse_mode must be a non-negative int");

return false;

}

return true;

}

/////////////

// Decoder //

/////////////

/* Adapted from CPython's Objects/floatobject.c::float_from_string_inner() */

static PyObject*

float_from_string(const char* s, Py_ssize_t len)

{

double x;

const char* end;

/* We don't care about overflow or underflow. If the platform

* supports them, infinities and signed zeroes (on underflow) are

* fine. */

x = PyOS_string_to_double(s, (char **) &end, NULL);

if (end != s + len) {

return NULL;

} else if (x == -1.0 && PyErr_Occurred()) {

return NULL;

} else {

return PyFloat_FromDouble(x);

}

struct PyHandler {

PyObject* decoderStartObject;

PyObject* decoderEndObject;

PyObject* decoderEndArray;

PyObject* decoderString;

PyObject* sharedKeys;

PyObject* root;

PyObject* objectHook;

unsigned datetimeMode;

unsigned uuidMode;

unsigned numberMode;

std::vector<HandlerContext> stack;

PyHandler(PyObject* decoder,

PyObject* hook,

unsigned dm,

unsigned um,

unsigned nm)

: decoderStartObject(NULL),

decoderEndObject(NULL),

decoderEndArray(NULL),

decoderString(NULL),

root(NULL),

objectHook(hook),

datetimeMode(dm),

uuidMode(um),

numberMode(nm)

{

stack.reserve(128);

if (decoder != NULL) {

assert(!objectHook);

if (PyObject_HasAttr(decoder, start_object_name)) {

decoderStartObject = PyObject_GetAttr(decoder, start_object_name);

}

if (PyObject_HasAttr(decoder, end_object_name)) {

decoderEndObject = PyObject_GetAttr(decoder, end_object_name);

}

if (PyObject_HasAttr(decoder, end_array_name)) {

decoderEndArray = PyObject_GetAttr(decoder, end_array_name);

}

if (PyObject_HasAttr(decoder, string_name)) {

decoderString = PyObject_GetAttr(decoder, string_name);

}

sharedKeys = PyDict_New();

}

~PyHandler() {

while (!stack.empty()) {

const HandlerContext& ctx = stack.back();

if (ctx.copiedKey)

PyMem_Free((void*) ctx.key);

if (ctx.object != NULL)

Py_DECREF(ctx.object);

stack.pop_back();

}

Py_CLEAR(decoderStartObject);

Py_CLEAR(decoderEndObject);

Py_CLEAR(decoderEndArray);

Py_CLEAR(decoderString);

Py_CLEAR(sharedKeys);

}

bool Handle(PyObject* value) {

if (root) {

const HandlerContext& current = stack.back();

if (current.isObject) {

PyObject* key = PyUnicode_FromStringAndSize(current.key,

current.keyLength);

if (key == NULL) {

Py_DECREF(value);

return false;

}

PyObject* shared_key = PyDict_SetDefault(sharedKeys, key, key);

if (shared_key == NULL) {

Py_DECREF(key);

Py_DECREF(value);

return false;

}

Py_INCREF(shared_key);

Py_DECREF(key);

key = shared_key;

int rc;

if (current.keyValuePairs) {

PyObject* pair = PyTuple_Pack(2, key, value);

Py_DECREF(key);

Py_DECREF(value);

if (pair == NULL) {

return false;

}

rc = PyList_Append(current.object, pair);

Py_DECREF(pair);

} else {

if (PyDict_CheckExact(current.object))

// If it's a standard dictionary, this is +20% faster

rc = PyDict_SetItem(current.object, key, value);

else

rc = PyObject_SetItem(current.object, key, value);

Py_DECREF(key);

Py_DECREF(value);

}

if (rc == -1) {

return false;

}

} else {

PyList_Append(current.object, value);

Py_DECREF(value);

}

} else {

root = value;

}

return true;

}

bool Key(const char* str, SizeType length, bool copy) {

HandlerContext& current = stack.back();

// This happens when operating in stream mode and kParseInsituFlag is not set: we

// must copy the incoming string in the context, and destroy the duplicate when

// the context gets reused for the next dictionary key

if (current.key && current.copiedKey) {

PyMem_Free((void*) current.key);

current.key = NULL;

}

if (copy) {

char* copied_str = (char*) PyMem_Malloc(length+1);

if (copied_str == NULL)

return false;

memcpy(copied_str, str, length+1);

str = copied_str;

assert(!current.key);

}

current.key = str;

current.keyLength = length;

current.copiedKey = copy;

return true;

}

bool StartObject() {

PyObject* mapping;

bool key_value_pairs;

if (decoderStartObject != NULL) {

mapping = PyObject_CallFunctionObjArgs(decoderStartObject, NULL);

if (mapping == NULL)

return false;

key_value_pairs = PyList_Check(mapping);

if (!PyMapping_Check(mapping) && !key_value_pairs) {

Py_DECREF(mapping);

PyErr_SetString(PyExc_ValueError,

"start_object() must return a mapping or a list instance");

return false;

}

} else {

mapping = PyDict_New();

if (mapping == NULL) {

return false;

}

key_value_pairs = false;

}

if (!Handle(mapping)) {

return false;

}

HandlerContext ctx;

ctx.isObject = true;

ctx.keyValuePairs = key_value_pairs;

ctx.object = mapping;

ctx.key = NULL;

ctx.copiedKey = false;

Py_INCREF(mapping);

stack.push_back(ctx);

return true;

}

bool EndObject(SizeType member_count) {

const HandlerContext& ctx = stack.back();

if (ctx.copiedKey)

PyMem_Free((void*) ctx.key);

PyObject* mapping = ctx.object;

stack.pop_back();

if (objectHook == NULL && decoderEndObject == NULL) {

Py_DECREF(mapping);

return true;

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python-rapidjson/rapidjson.cpp at master · manishgit138/python-rapidjson · GitHub

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