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_speedups.c
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_speedups.c
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/* -*- mode: C; c-file-style: "python"; c-basic-offset: 4 -*- */
#include "Python.h"
#include "structmember.h"
#if PY_MAJOR_VERSION >= 3
#define PyInt_FromSsize_t PyLong_FromSsize_t
#define PyInt_AsSsize_t PyLong_AsSsize_t
#define PyInt_Check(obj) 0
#define PyInt_CheckExact(obj) 0
#define JSON_UNICHR Py_UCS4
#define JSON_InternFromString PyUnicode_InternFromString
#define PyString_GET_SIZE PyUnicode_GET_LENGTH
#define PY2_UNUSED
#define PY3_UNUSED UNUSED
#else /* PY_MAJOR_VERSION >= 3 */
#define PY2_UNUSED UNUSED
#define PY3_UNUSED
#define PyBytes_Check PyString_Check
#define PyUnicode_READY(obj) 0
#define PyUnicode_KIND(obj) (sizeof(Py_UNICODE))
#define PyUnicode_DATA(obj) ((void *)(PyUnicode_AS_UNICODE(obj)))
#define PyUnicode_READ(kind, data, index) ((JSON_UNICHR)((const Py_UNICODE *)(data))[(index)])
#define PyUnicode_GET_LENGTH PyUnicode_GET_SIZE
#define JSON_UNICHR Py_UNICODE
#define JSON_InternFromString PyString_InternFromString
#endif /* PY_MAJOR_VERSION < 3 */
#if PY_VERSION_HEX < 0x03090000
#if !defined(PyObject_CallNoArgs)
#define PyObject_CallNoArgs(callable) PyObject_CallFunctionObjArgs(callable, NULL);
#endif
#if !defined(PyObject_CallOneArg)
#define PyObject_CallOneArg(callable, arg) PyObject_CallFunctionObjArgs(callable, arg, NULL);
#endif
#endif /* PY_VERSION_HEX < 0x03090000 */
#if PY_VERSION_HEX < 0x02070000
#if !defined(PyOS_string_to_double)
#define PyOS_string_to_double json_PyOS_string_to_double
static double
json_PyOS_string_to_double(const char *s, char **endptr, PyObject *overflow_exception);
static double
json_PyOS_string_to_double(const char *s, char **endptr, PyObject *overflow_exception)
{
double x;
assert(endptr == NULL);
assert(overflow_exception == NULL);
PyFPE_START_PROTECT("json_PyOS_string_to_double", return -1.0;)
x = PyOS_ascii_atof(s);
PyFPE_END_PROTECT(x)
return x;
}
#endif
#endif /* PY_VERSION_HEX < 0x02070000 */
#if PY_VERSION_HEX < 0x02060000
#if !defined(Py_TYPE)
#define Py_TYPE(ob) (((PyObject*)(ob))->ob_type)
#endif
#if !defined(Py_SIZE)
#define Py_SIZE(ob) (((PyVarObject*)(ob))->ob_size)
#endif
#if !defined(PyVarObject_HEAD_INIT)
#define PyVarObject_HEAD_INIT(type, size) PyObject_HEAD_INIT(type) size,
#endif
#endif /* PY_VERSION_HEX < 0x02060000 */
#ifdef __GNUC__
#define UNUSED __attribute__((__unused__))
#else
#define UNUSED
#endif
#define DEFAULT_ENCODING "utf-8"
#define PyScanner_Check(op) PyObject_TypeCheck(op, &PyScannerType)
#define PyScanner_CheckExact(op) (Py_TYPE(op) == &PyScannerType)
#define PyEncoder_Check(op) PyObject_TypeCheck(op, &PyEncoderType)
#define PyEncoder_CheckExact(op) (Py_TYPE(op) == &PyEncoderType)
#define JSON_ALLOW_NAN 1
#define JSON_IGNORE_NAN 2
static PyObject *JSON_Infinity = NULL;
static PyObject *JSON_NegInfinity = NULL;
static PyObject *JSON_NaN = NULL;
static PyObject *JSON_EmptyUnicode = NULL;
#if PY_MAJOR_VERSION < 3
static PyObject *JSON_EmptyStr = NULL;
#endif
static PyTypeObject PyScannerType;
static PyTypeObject PyEncoderType;
typedef struct {
PyObject *large_strings; /* A list of previously accumulated large strings */
PyObject *small_strings; /* Pending small strings */
} JSON_Accu;
static int
JSON_Accu_Init(JSON_Accu *acc);
static int
JSON_Accu_Accumulate(JSON_Accu *acc, PyObject *unicode);
static PyObject *
JSON_Accu_FinishAsList(JSON_Accu *acc);
static void
JSON_Accu_Destroy(JSON_Accu *acc);
#define ERR_EXPECTING_VALUE "Expecting value"
#define ERR_ARRAY_DELIMITER "Expecting ',' delimiter or ']'"
#define ERR_ARRAY_VALUE_FIRST "Expecting value or ']'"
#define ERR_OBJECT_DELIMITER "Expecting ',' delimiter or '}'"
#define ERR_OBJECT_PROPERTY "Expecting property name enclosed in double quotes"
#define ERR_OBJECT_PROPERTY_FIRST "Expecting property name enclosed in double quotes or '}'"
#define ERR_OBJECT_PROPERTY_DELIMITER "Expecting ':' delimiter"
#define ERR_STRING_UNTERMINATED "Unterminated string starting at"
#define ERR_STRING_CONTROL "Invalid control character %r at"
#define ERR_STRING_ESC1 "Invalid \\X escape sequence %r"
#define ERR_STRING_ESC4 "Invalid \\uXXXX escape sequence"
#define FOR_JSON_METHOD_NAME "for_json"
#define ASDICT_METHOD_NAME "_asdict"
typedef struct _PyScannerObject {
PyObject_HEAD
PyObject *encoding;
PyObject *strict_bool;
int strict;
PyObject *object_hook;
PyObject *pairs_hook;
PyObject *parse_float;
PyObject *parse_int;
PyObject *parse_constant;
PyObject *memo;
} PyScannerObject;
static PyMemberDef scanner_members[] = {
{"encoding", T_OBJECT, offsetof(PyScannerObject, encoding), READONLY, "encoding"},
{"strict", T_OBJECT, offsetof(PyScannerObject, strict_bool), READONLY, "strict"},
{"object_hook", T_OBJECT, offsetof(PyScannerObject, object_hook), READONLY, "object_hook"},
{"object_pairs_hook", T_OBJECT, offsetof(PyScannerObject, pairs_hook), READONLY, "object_pairs_hook"},
{"parse_float", T_OBJECT, offsetof(PyScannerObject, parse_float), READONLY, "parse_float"},
{"parse_int", T_OBJECT, offsetof(PyScannerObject, parse_int), READONLY, "parse_int"},
{"parse_constant", T_OBJECT, offsetof(PyScannerObject, parse_constant), READONLY, "parse_constant"},
{NULL}
};
typedef struct _PyEncoderObject {
PyObject_HEAD
PyObject *markers;
PyObject *defaultfn;
PyObject *encoder;
PyObject *indent;
PyObject *key_separator;
PyObject *item_separator;
PyObject *sort_keys;
PyObject *key_memo;
PyObject *encoding;
PyObject *Decimal;
PyObject *skipkeys_bool;
int skipkeys;
int fast_encode;
/* 0, JSON_ALLOW_NAN, JSON_IGNORE_NAN */
int allow_or_ignore_nan;
int use_decimal;
int namedtuple_as_object;
int tuple_as_array;
int iterable_as_array;
PyObject *max_long_size;
PyObject *min_long_size;
PyObject *item_sort_key;
PyObject *item_sort_kw;
int for_json;
} PyEncoderObject;
static PyMemberDef encoder_members[] = {
{"markers", T_OBJECT, offsetof(PyEncoderObject, markers), READONLY, "markers"},
{"default", T_OBJECT, offsetof(PyEncoderObject, defaultfn), READONLY, "default"},
{"encoder", T_OBJECT, offsetof(PyEncoderObject, encoder), READONLY, "encoder"},
{"encoding", T_OBJECT, offsetof(PyEncoderObject, encoder), READONLY, "encoding"},
{"indent", T_OBJECT, offsetof(PyEncoderObject, indent), READONLY, "indent"},
{"key_separator", T_OBJECT, offsetof(PyEncoderObject, key_separator), READONLY, "key_separator"},
{"item_separator", T_OBJECT, offsetof(PyEncoderObject, item_separator), READONLY, "item_separator"},
{"sort_keys", T_OBJECT, offsetof(PyEncoderObject, sort_keys), READONLY, "sort_keys"},
/* Python 2.5 does not support T_BOOl */
{"skipkeys", T_OBJECT, offsetof(PyEncoderObject, skipkeys_bool), READONLY, "skipkeys"},
{"key_memo", T_OBJECT, offsetof(PyEncoderObject, key_memo), READONLY, "key_memo"},
{"item_sort_key", T_OBJECT, offsetof(PyEncoderObject, item_sort_key), READONLY, "item_sort_key"},
{"max_long_size", T_OBJECT, offsetof(PyEncoderObject, max_long_size), READONLY, "max_long_size"},
{"min_long_size", T_OBJECT, offsetof(PyEncoderObject, min_long_size), READONLY, "min_long_size"},
{NULL}
};
static PyObject *
join_list_unicode(PyObject *lst);
static PyObject *
JSON_ParseEncoding(PyObject *encoding);
static PyObject *
maybe_quote_bigint(PyEncoderObject* s, PyObject *encoded, PyObject *obj);
static Py_ssize_t
ascii_char_size(JSON_UNICHR c);
static Py_ssize_t
ascii_escape_char(JSON_UNICHR c, char *output, Py_ssize_t chars);
static PyObject *
ascii_escape_unicode(PyObject *pystr);
static PyObject *
ascii_escape_str(PyObject *pystr);
static PyObject *
py_encode_basestring_ascii(PyObject* self UNUSED, PyObject *pystr);
#if PY_MAJOR_VERSION < 3
static PyObject *
join_list_string(PyObject *lst);
static PyObject *
scan_once_str(PyScannerObject *s, PyObject *pystr, Py_ssize_t idx, Py_ssize_t *next_idx_ptr);
static PyObject *
scanstring_str(PyObject *pystr, Py_ssize_t end, char *encoding, int strict, Py_ssize_t *next_end_ptr);
static PyObject *
_parse_object_str(PyScannerObject *s, PyObject *pystr, Py_ssize_t idx, Py_ssize_t *next_idx_ptr);
#endif
static PyObject *
scanstring_unicode(PyObject *pystr, Py_ssize_t end, int strict, Py_ssize_t *next_end_ptr);
static PyObject *
scan_once_unicode(PyScannerObject *s, PyObject *pystr, Py_ssize_t idx, Py_ssize_t *next_idx_ptr);
static PyObject *
_build_rval_index_tuple(PyObject *rval, Py_ssize_t idx);
static PyObject *
scanner_new(PyTypeObject *type, PyObject *args, PyObject *kwds);
static void
scanner_dealloc(PyObject *self);
static int
scanner_clear(PyObject *self);
static PyObject *
encoder_new(PyTypeObject *type, PyObject *args, PyObject *kwds);
static void
encoder_dealloc(PyObject *self);
static int
encoder_clear(PyObject *self);
static int
is_raw_json(PyObject *obj);
static PyObject *
encoder_stringify_key(PyEncoderObject *s, PyObject *key);
static int
encoder_listencode_list(PyEncoderObject *s, JSON_Accu *rval, PyObject *seq, Py_ssize_t indent_level);
static int
encoder_listencode_obj(PyEncoderObject *s, JSON_Accu *rval, PyObject *obj, Py_ssize_t indent_level);
static int
encoder_listencode_dict(PyEncoderObject *s, JSON_Accu *rval, PyObject *dct, Py_ssize_t indent_level);
static PyObject *
_encoded_const(PyObject *obj);
static void
raise_errmsg(char *msg, PyObject *s, Py_ssize_t end);
static PyObject *
encoder_encode_string(PyEncoderObject *s, PyObject *obj);
static int
_convertPyInt_AsSsize_t(PyObject *o, Py_ssize_t *size_ptr);
static PyObject *
_convertPyInt_FromSsize_t(Py_ssize_t *size_ptr);
static int
_call_json_method(PyObject *obj, const char *method_name, PyObject **result);
static PyObject *
encoder_encode_float(PyEncoderObject *s, PyObject *obj);
static PyObject *
moduleinit(void);
#define S_CHAR(c) (c >= ' ' && c <= '~' && c != '\\' && c != '"')
#define IS_WHITESPACE(c) (((c) == ' ') || ((c) == '\t') || ((c) == '\n') || ((c) == '\r'))
#define MIN_EXPANSION 6
static PyObject* RawJSONType = NULL;
static int
is_raw_json(PyObject *obj)
{
return PyObject_IsInstance(obj, RawJSONType) ? 1 : 0;
}
static int
JSON_Accu_Init(JSON_Accu *acc)
{
/* Lazily allocated */
acc->large_strings = NULL;
acc->small_strings = PyList_New(0);
if (acc->small_strings == NULL)
return -1;
return 0;
}
static int
flush_accumulator(JSON_Accu *acc)
{
Py_ssize_t nsmall = PyList_GET_SIZE(acc->small_strings);
if (nsmall) {
int ret;
PyObject *joined;
if (acc->large_strings == NULL) {
acc->large_strings = PyList_New(0);
if (acc->large_strings == NULL)
return -1;
}
#if PY_MAJOR_VERSION >= 3
joined = join_list_unicode(acc->small_strings);
#else /* PY_MAJOR_VERSION >= 3 */
joined = join_list_string(acc->small_strings);
#endif /* PY_MAJOR_VERSION < 3 */
if (joined == NULL)
return -1;
if (PyList_SetSlice(acc->small_strings, 0, nsmall, NULL)) {
Py_DECREF(joined);
return -1;
}
ret = PyList_Append(acc->large_strings, joined);
Py_DECREF(joined);
return ret;
}
return 0;
}
static int
JSON_Accu_Accumulate(JSON_Accu *acc, PyObject *unicode)
{
Py_ssize_t nsmall;
#if PY_MAJOR_VERSION >= 3
assert(PyUnicode_Check(unicode));
#else /* PY_MAJOR_VERSION >= 3 */
assert(PyString_Check(unicode) || PyUnicode_Check(unicode));
#endif /* PY_MAJOR_VERSION < 3 */
if (PyList_Append(acc->small_strings, unicode))
return -1;
nsmall = PyList_GET_SIZE(acc->small_strings);
/* Each item in a list of unicode objects has an overhead (in 64-bit
* builds) of:
* - 8 bytes for the list slot
* - 56 bytes for the header of the unicode object
* that is, 64 bytes. 100000 such objects waste more than 6MB
* compared to a single concatenated string.
*/
if (nsmall < 100000)
return 0;
return flush_accumulator(acc);
}
static PyObject *
JSON_Accu_FinishAsList(JSON_Accu *acc)
{
int ret;
PyObject *res;
ret = flush_accumulator(acc);
Py_CLEAR(acc->small_strings);
if (ret) {
Py_CLEAR(acc->large_strings);
return NULL;
}
res = acc->large_strings;
acc->large_strings = NULL;
if (res == NULL)
return PyList_New(0);
return res;
}
static void
JSON_Accu_Destroy(JSON_Accu *acc)
{
Py_CLEAR(acc->small_strings);
Py_CLEAR(acc->large_strings);
}
static int
IS_DIGIT(JSON_UNICHR c)
{
return c >= '0' && c <= '9';
}
static PyObject *
maybe_quote_bigint(PyEncoderObject* s, PyObject *encoded, PyObject *obj)
{
if (s->max_long_size != Py_None && s->min_long_size != Py_None) {
if (PyObject_RichCompareBool(obj, s->max_long_size, Py_GE) ||
PyObject_RichCompareBool(obj, s->min_long_size, Py_LE)) {
#if PY_MAJOR_VERSION >= 3
PyObject* quoted = PyUnicode_FromFormat("\"%U\"", encoded);
#else
PyObject* quoted = PyString_FromFormat("\"%s\"",
PyString_AsString(encoded));
#endif
Py_DECREF(encoded);
encoded = quoted;
}
}
return encoded;
}
static int
_call_json_method(PyObject *obj, const char *method_name, PyObject **result)
{
int rval = 0;
PyObject *method = PyObject_GetAttrString(obj, method_name);
if (method == NULL) {
PyErr_Clear();
return 0;
}
if (PyCallable_Check(method)) {
PyObject *tmp = PyObject_CallNoArgs(method);
if (tmp == NULL && PyErr_ExceptionMatches(PyExc_TypeError)) {
PyErr_Clear();
} else {
// This will set result to NULL if a TypeError occurred,
// which must be checked by the caller
*result = tmp;
rval = 1;
}
}
Py_DECREF(method);
return rval;
}
static int
_convertPyInt_AsSsize_t(PyObject *o, Py_ssize_t *size_ptr)
{
/* PyObject to Py_ssize_t converter */
*size_ptr = PyInt_AsSsize_t(o);
if (*size_ptr == -1 && PyErr_Occurred())
return 0;
return 1;
}
static PyObject *
_convertPyInt_FromSsize_t(Py_ssize_t *size_ptr)
{
/* Py_ssize_t to PyObject converter */
return PyInt_FromSsize_t(*size_ptr);
}
static Py_ssize_t
ascii_escape_char(JSON_UNICHR c, char *output, Py_ssize_t chars)
{
/* Escape unicode code point c to ASCII escape sequences
in char *output. output must have at least 12 bytes unused to
accommodate an escaped surrogate pair "\uXXXX\uXXXX" */
if (S_CHAR(c)) {
output[chars++] = (char)c;
}
else {
output[chars++] = '\\';
switch (c) {
case '\\': output[chars++] = (char)c; break;
case '"': output[chars++] = (char)c; break;
case '\b': output[chars++] = 'b'; break;
case '\f': output[chars++] = 'f'; break;
case '\n': output[chars++] = 'n'; break;
case '\r': output[chars++] = 'r'; break;
case '\t': output[chars++] = 't'; break;
default:
#if PY_MAJOR_VERSION >= 3 || defined(Py_UNICODE_WIDE)
if (c >= 0x10000) {
/* UTF-16 surrogate pair */
JSON_UNICHR v = c - 0x10000;
c = 0xd800 | ((v >> 10) & 0x3ff);
output[chars++] = 'u';
output[chars++] = "0123456789abcdef"[(c >> 12) & 0xf];
output[chars++] = "0123456789abcdef"[(c >> 8) & 0xf];
output[chars++] = "0123456789abcdef"[(c >> 4) & 0xf];
output[chars++] = "0123456789abcdef"[(c ) & 0xf];
c = 0xdc00 | (v & 0x3ff);
output[chars++] = '\\';
}
#endif
output[chars++] = 'u';
output[chars++] = "0123456789abcdef"[(c >> 12) & 0xf];
output[chars++] = "0123456789abcdef"[(c >> 8) & 0xf];
output[chars++] = "0123456789abcdef"[(c >> 4) & 0xf];
output[chars++] = "0123456789abcdef"[(c ) & 0xf];
}
}
return chars;
}
static Py_ssize_t
ascii_char_size(JSON_UNICHR c)
{
if (S_CHAR(c)) {
return 1;
}
else if (c == '\\' ||
c == '"' ||
c == '\b' ||
c == '\f' ||
c == '\n' ||
c == '\r' ||
c == '\t') {
return 2;
}
#if PY_MAJOR_VERSION >= 3 || defined(Py_UNICODE_WIDE)
else if (c >= 0x10000U) {
return 2 * MIN_EXPANSION;
}
#endif
else {
return MIN_EXPANSION;
}
}
static PyObject *
ascii_escape_unicode(PyObject *pystr)
{
/* Take a PyUnicode pystr and return a new ASCII-only escaped PyString */
Py_ssize_t i;
Py_ssize_t input_chars = PyUnicode_GET_LENGTH(pystr);
Py_ssize_t output_size = 2;
Py_ssize_t chars;
PY2_UNUSED int kind = PyUnicode_KIND(pystr);
void *data = PyUnicode_DATA(pystr);
PyObject *rval;
char *output;
output_size = 2;
for (i = 0; i < input_chars; i++) {
output_size += ascii_char_size(PyUnicode_READ(kind, data, i));
}
#if PY_MAJOR_VERSION >= 3
rval = PyUnicode_New(output_size, 127);
if (rval == NULL) {
return NULL;
}
assert(PyUnicode_KIND(rval) == PyUnicode_1BYTE_KIND);
output = (char *)PyUnicode_DATA(rval);
#else
rval = PyString_FromStringAndSize(NULL, output_size);
if (rval == NULL) {
return NULL;
}
output = PyString_AS_STRING(rval);
#endif
chars = 0;
output[chars++] = '"';
for (i = 0; i < input_chars; i++) {
chars = ascii_escape_char(PyUnicode_READ(kind, data, i), output, chars);
}
output[chars++] = '"';
assert(chars == output_size);
return rval;
}
#if PY_MAJOR_VERSION >= 3
static PyObject *
ascii_escape_str(PyObject *pystr)
{
PyObject *rval;
PyObject *input = PyUnicode_DecodeUTF8(PyBytes_AS_STRING(pystr), PyBytes_GET_SIZE(pystr), NULL);
if (input == NULL)
return NULL;
rval = ascii_escape_unicode(input);
Py_DECREF(input);
return rval;
}
#else /* PY_MAJOR_VERSION >= 3 */
static PyObject *
ascii_escape_str(PyObject *pystr)
{
/* Take a PyString pystr and return a new ASCII-only escaped PyString */
Py_ssize_t i;
Py_ssize_t input_chars;
Py_ssize_t output_size;
Py_ssize_t chars;
PyObject *rval;
char *output;
char *input_str;
input_chars = PyString_GET_SIZE(pystr);
input_str = PyString_AS_STRING(pystr);
output_size = 2;
/* Fast path for a string that's already ASCII */
for (i = 0; i < input_chars; i++) {
JSON_UNICHR c = (JSON_UNICHR)input_str[i];
if (c > 0x7f) {
/* We hit a non-ASCII character, bail to unicode mode */
PyObject *uni;
uni = PyUnicode_DecodeUTF8(input_str, input_chars, "strict");
if (uni == NULL) {
return NULL;
}
rval = ascii_escape_unicode(uni);
Py_DECREF(uni);
return rval;
}
output_size += ascii_char_size(c);
}
rval = PyString_FromStringAndSize(NULL, output_size);
if (rval == NULL) {
return NULL;
}
chars = 0;
output = PyString_AS_STRING(rval);
output[chars++] = '"';
for (i = 0; i < input_chars; i++) {
chars = ascii_escape_char((JSON_UNICHR)input_str[i], output, chars);
}
output[chars++] = '"';
assert(chars == output_size);
return rval;
}
#endif /* PY_MAJOR_VERSION < 3 */
static PyObject *
encoder_stringify_key(PyEncoderObject *s, PyObject *key)
{
if (PyUnicode_Check(key)) {
Py_INCREF(key);
return key;
}
#if PY_MAJOR_VERSION >= 3
else if (PyBytes_Check(key) && s->encoding != NULL) {
const char *encoding = PyUnicode_AsUTF8(s->encoding);
if (encoding == NULL)
return NULL;
return PyUnicode_Decode(
PyBytes_AS_STRING(key),
PyBytes_GET_SIZE(key),
encoding,
NULL);
}
#else /* PY_MAJOR_VERSION >= 3 */
else if (PyString_Check(key)) {
Py_INCREF(key);
return key;
}
#endif /* PY_MAJOR_VERSION < 3 */
else if (PyFloat_Check(key)) {
return encoder_encode_float(s, key);
}
else if (key == Py_True || key == Py_False || key == Py_None) {
/* This must come before the PyInt_Check because
True and False are also 1 and 0.*/
return _encoded_const(key);
}
else if (PyInt_Check(key) || PyLong_Check(key)) {
if (!(PyInt_CheckExact(key) || PyLong_CheckExact(key))) {
/* See #118, do not trust custom str/repr */
PyObject *res;
PyObject *tmp = PyObject_CallOneArg((PyObject *)&PyLong_Type, key);
if (tmp == NULL) {
return NULL;
}
res = PyObject_Str(tmp);
Py_DECREF(tmp);
return res;
}
else {
return PyObject_Str(key);
}
}
else if (s->use_decimal && PyObject_TypeCheck(key, (PyTypeObject *)s->Decimal)) {
return PyObject_Str(key);
}
if (s->skipkeys) {
Py_INCREF(Py_None);
return Py_None;
}
PyErr_Format(PyExc_TypeError,
"keys must be str, int, float, bool or None, "
"not %.100s", key->ob_type->tp_name);
return NULL;
}
static PyObject *
encoder_dict_iteritems(PyEncoderObject *s, PyObject *dct)
{
PyObject *items;
PyObject *iter = NULL;
PyObject *lst = NULL;
PyObject *item = NULL;
PyObject *kstr = NULL;
PyObject *sortfun = NULL;
PyObject *sortres;
static PyObject *sortargs = NULL;
if (sortargs == NULL) {
sortargs = PyTuple_New(0);
if (sortargs == NULL)
return NULL;
}
if (PyDict_CheckExact(dct))
items = PyDict_Items(dct);
else
items = PyMapping_Items(dct);
if (items == NULL)
return NULL;
iter = PyObject_GetIter(items);
Py_DECREF(items);
if (iter == NULL)
return NULL;
if (s->item_sort_kw == Py_None)
return iter;
lst = PyList_New(0);
if (lst == NULL)
goto bail;
while ((item = PyIter_Next(iter))) {
PyObject *key, *value;
if (!PyTuple_Check(item) || Py_SIZE(item) != 2) {
PyErr_SetString(PyExc_ValueError, "items must return 2-tuples");
goto bail;
}
key = PyTuple_GET_ITEM(item, 0);
if (key == NULL)
goto bail;
#if PY_MAJOR_VERSION < 3
else if (PyString_Check(key)) {
/* item can be added as-is */
}
#endif /* PY_MAJOR_VERSION < 3 */
else if (PyUnicode_Check(key)) {
/* item can be added as-is */
}
else {
PyObject *tpl;
kstr = encoder_stringify_key(s, key);
if (kstr == NULL)
goto bail;
else if (kstr == Py_None) {
/* skipkeys */
Py_DECREF(kstr);
continue;
}
value = PyTuple_GET_ITEM(item, 1);
if (value == NULL)
goto bail;
tpl = PyTuple_Pack(2, kstr, value);
if (tpl == NULL)
goto bail;
Py_CLEAR(kstr);
Py_DECREF(item);
item = tpl;
}
if (PyList_Append(lst, item))
goto bail;
Py_DECREF(item);
}
Py_CLEAR(iter);
if (PyErr_Occurred())
goto bail;
sortfun = PyObject_GetAttrString(lst, "sort");
if (sortfun == NULL)
goto bail;
sortres = PyObject_Call(sortfun, sortargs, s->item_sort_kw);
if (!sortres)
goto bail;
Py_DECREF(sortres);
Py_CLEAR(sortfun);
iter = PyObject_GetIter(lst);
Py_CLEAR(lst);
return iter;
bail:
Py_XDECREF(sortfun);
Py_XDECREF(kstr);
Py_XDECREF(item);
Py_XDECREF(lst);
Py_XDECREF(iter);
return NULL;
}
/* Use JSONDecodeError exception to raise a nice looking ValueError subclass */
static PyObject *JSONDecodeError = NULL;
static void
raise_errmsg(char *msg, PyObject *s, Py_ssize_t end)
{
PyObject *exc = PyObject_CallFunction(JSONDecodeError, "(zOO&)", msg, s, _convertPyInt_FromSsize_t, &end);
if (exc) {
PyErr_SetObject(JSONDecodeError, exc);
Py_DECREF(exc);
}
}
static PyObject *
join_list_unicode(PyObject *lst)
{
/* return u''.join(lst) */
return PyUnicode_Join(JSON_EmptyUnicode, lst);
}
#if PY_MAJOR_VERSION >= 3
#define join_list_string join_list_unicode
#else /* PY_MAJOR_VERSION >= 3 */
static PyObject *
join_list_string(PyObject *lst)
{
/* return ''.join(lst) */
static PyObject *joinfn = NULL;
if (joinfn == NULL) {
joinfn = PyObject_GetAttrString(JSON_EmptyStr, "join");
if (joinfn == NULL)
return NULL;
}
return PyObject_CallOneArg(joinfn, lst);
}
#endif /* PY_MAJOR_VERSION < 3 */
static PyObject *
_build_rval_index_tuple(PyObject *rval, Py_ssize_t idx)
{
/* return (rval, idx) tuple, stealing reference to rval */
PyObject *tpl;
PyObject *pyidx;
/*
steal a reference to rval, returns (rval, idx)
*/
if (rval == NULL) {
assert(PyErr_Occurred());
return NULL;
}
pyidx = PyInt_FromSsize_t(idx);
if (pyidx == NULL) {
Py_DECREF(rval);
return NULL;
}
tpl = PyTuple_New(2);
if (tpl == NULL) {
Py_DECREF(pyidx);
Py_DECREF(rval);
return NULL;
}
PyTuple_SET_ITEM(tpl, 0, rval);
PyTuple_SET_ITEM(tpl, 1, pyidx);
return tpl;
}
#define APPEND_OLD_CHUNK \
if (chunk != NULL) { \
if (chunks == NULL) { \
chunks = PyList_New(0); \
if (chunks == NULL) { \
goto bail; \
} \
} \
if (PyList_Append(chunks, chunk)) { \
goto bail; \
} \
Py_CLEAR(chunk); \
}
#if PY_MAJOR_VERSION < 3
static PyObject *
scanstring_str(PyObject *pystr, Py_ssize_t end, char *encoding, int strict, Py_ssize_t *next_end_ptr)
{
/* Read the JSON string from PyString pystr.
end is the index of the first character after the quote.
encoding is the encoding of pystr (must be an ASCII superset)
if strict is zero then literal control characters are allowed
*next_end_ptr is a return-by-reference index of the character
after the end quote
Return value is a new PyString (if ASCII-only) or PyUnicode
*/
PyObject *rval;
Py_ssize_t len = PyString_GET_SIZE(pystr);
Py_ssize_t begin = end - 1;
Py_ssize_t next = begin;
int has_unicode = 0;
char *buf = PyString_AS_STRING(pystr);
PyObject *chunks = NULL;
PyObject *chunk = NULL;
PyObject *strchunk = NULL;
if (len == end) {
raise_errmsg(ERR_STRING_UNTERMINATED, pystr, begin);
goto bail;
}
else if (end < 0 || len < end) {
PyErr_SetString(PyExc_ValueError, "end is out of bounds");
goto bail;
}
while (1) {
/* Find the end of the string or the next escape */
Py_UNICODE c = 0;
for (next = end; next < len; next++) {
c = (unsigned char)buf[next];
if (c == '"' || c == '\\') {
break;
}
else if (strict && c <= 0x1f) {
raise_errmsg(ERR_STRING_CONTROL, pystr, next);
goto bail;
}
else if (c > 0x7f) {
has_unicode = 1;
}
}
if (!(c == '"' || c == '\\')) {
raise_errmsg(ERR_STRING_UNTERMINATED, pystr, begin);
goto bail;
}
/* Pick up this chunk if it's not zero length */
if (next != end) {
APPEND_OLD_CHUNK
strchunk = PyString_FromStringAndSize(&buf[end], next - end);
if (strchunk == NULL) {
goto bail;
}
if (has_unicode) {
chunk = PyUnicode_FromEncodedObject(strchunk, encoding, NULL);
Py_DECREF(strchunk);
if (chunk == NULL) {
goto bail;
}
}
else {
chunk = strchunk;
}
}
next++;
if (c == '"') {
end = next;
break;
}
if (next == len) {
raise_errmsg(ERR_STRING_UNTERMINATED, pystr, begin);
goto bail;
}
c = buf[next];
if (c != 'u') {
/* Non-unicode backslash escapes */
end = next + 1;
switch (c) {
case '"': break;
case '\\': break;
case '/': break;
case 'b': c = '\b'; break;
case 'f': c = '\f'; break;
case 'n': c = '\n'; break;
case 'r': c = '\r'; break;
case 't': c = '\t'; break;
default: c = 0;
}
if (c == 0) {
raise_errmsg(ERR_STRING_ESC1, pystr, end - 2);
goto bail;
}
}
else {
c = 0;
next++;
end = next + 4;
if (end >= len) {
raise_errmsg(ERR_STRING_ESC4, pystr, next - 1);
goto bail;
}
/* Decode 4 hex digits */
for (; next < end; next++) {
JSON_UNICHR digit = (JSON_UNICHR)buf[next];
c <<= 4;
switch (digit) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
c |= (digit - '0'); break;
case 'a': case 'b': case 'c': case 'd': case 'e':
case 'f':
c |= (digit - 'a' + 10); break;
case 'A': case 'B': case 'C': case 'D': case 'E':
case 'F':
c |= (digit - 'A' + 10); break;
default:
raise_errmsg(ERR_STRING_ESC4, pystr, end - 5);
goto bail;
}
}
#if defined(Py_UNICODE_WIDE)
/* Surrogate pair */
if ((c & 0xfc00) == 0xd800) {
if (end + 6 < len && buf[next] == '\\' && buf[next+1] == 'u') {
JSON_UNICHR c2 = 0;
end += 6;
/* Decode 4 hex digits */
for (next += 2; next < end; next++) {
c2 <<= 4;
JSON_UNICHR digit = buf[next];
switch (digit) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
c2 |= (digit - '0'); break;
case 'a': case 'b': case 'c': case 'd': case 'e':
case 'f':
c2 |= (digit - 'a' + 10); break;
case 'A': case 'B': case 'C': case 'D': case 'E':
case 'F':
c2 |= (digit - 'A' + 10); break;
default:
raise_errmsg(ERR_STRING_ESC4, pystr, end - 5);
goto bail;
}
}
if ((c2 & 0xfc00) != 0xdc00) {
/* not a low surrogate, rewind */
end -= 6;