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py-yajl/yajl.c

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/*
* Copyright 2009, R. Tyler Ballance <tyler@monkeypox.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. Neither the name of R. Tyler Ballance nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <Python.h>
#include "py_yajl.h"
static PyMethodDef yajldecoder_methods[] = {
{"decode", (PyCFunction)(py_yajldecoder_decode), METH_VARARGS, NULL},
{NULL}
};
static PyMethodDef yajlencoder_methods[] = {
{"encode", (PyCFunction)(py_yajlencoder_encode), METH_VARARGS, NULL},
{NULL}
};
static PyTypeObject YajlDecoderType = {
#ifdef IS_PYTHON3
PyVarObject_HEAD_INIT(NULL, 0)
#else
PyObject_HEAD_INIT(NULL)
0, /*ob_size*/
#endif
"yajl.YajlDecoder", /*tp_name*/
sizeof(_YajlDecoder), /*tp_basicsize*/
0, /*tp_itemsize*/
(destructor)yajldecoder_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*/
"Yajl-based decoder", /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
yajldecoder_methods, /* tp_methods */
NULL, /* tp_members */
0, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
(initproc)(yajldecoder_init),/* tp_init */
0, /* tp_alloc */
};
static PyTypeObject YajlEncoderType = {
#ifdef IS_PYTHON3
PyVarObject_HEAD_INIT(NULL, 0)
#else
PyObject_HEAD_INIT(NULL)
0, /*ob_size*/
#endif
"yajl.YajlEncoder", /*tp_name*/
sizeof(_YajlEncoder), /*tp_basicsize*/
0, /*tp_itemsize*/
(destructor)yajlencoder_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*/
"Yajl-based encoder", /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
yajlencoder_methods, /* tp_methods */
NULL, /* tp_members */
0, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
(initproc)(yajlencoder_init),/* tp_init */
0, /* tp_alloc */
};
static PyObject *py_loads(PYARGS)
{
PyObject *decoder = NULL;
PyObject *result = NULL;
char *buffer = NULL;
unsigned int buflen = 0;
if (!PyArg_ParseTuple(args, "z#", &buffer, &buflen)) {
return NULL;
}
decoder = PyObject_Call((PyObject *)(&YajlDecoderType), NULL, NULL);
if (decoder == NULL) {
return NULL;
}
result = _internal_decode((_YajlDecoder *)decoder, buffer, buflen);
Py_XDECREF(decoder);
return result;
}
static char *__config_gen_config(PyObject *indent, yajl_gen_config *config)
{
long indentLevel = -1;
char *spaces = NULL;
if (!indent)
return NULL;
if ((indent != Py_None) && (!PyLong_Check(indent))
#ifndef IS_PYTHON3
&& (!PyInt_Check(indent))
#endif
) {
PyErr_SetObject(PyExc_TypeError,
PyUnicode_FromString("`indent` must be int or None"));
return NULL;
}
if (indent != Py_None) {
indentLevel = PyLong_AsLong(indent);
if (indentLevel >= 0) {
config->beautify = 1;
if (indentLevel == 0) {
config->indentString = "";
}
else {
spaces = (char *)(malloc(sizeof(char) * (indentLevel + 1)));
memset((void *)(spaces), (int)' ', indentLevel);
spaces[indentLevel] = '\0';
config->indentString = spaces;
}
}
}
return spaces;
}
static PyObject *py_dumps(PYARGS)
{
PyObject *encoder = NULL;
PyObject *obj = NULL;
PyObject *result = NULL;
PyObject *indent = NULL;
yajl_gen_config config = { 0, NULL };
static char *kwlist[] = {"object", "indent", NULL};
char *spaces = NULL;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O|O", kwlist, &obj, &indent)) {
return NULL;
}
spaces = __config_gen_config(indent, &config);
if (PyErr_Occurred()) {
return NULL;
}
encoder = PyObject_Call((PyObject *)(&YajlEncoderType), NULL, NULL);
if (encoder == NULL) {
return NULL;
}
result = _internal_encode((_YajlEncoder *)encoder, obj, config);
Py_XDECREF(encoder);
if (spaces) {
free(spaces);
}
return result;
}
static PyObject *__read = NULL;
static PyObject *_internal_stream_load(PyObject *args, unsigned int blocking)
{
PyObject *decoder = NULL;
PyObject *stream = NULL;
PyObject *buffer = NULL;
PyObject *result = NULL;
#ifdef IS_PYTHON3
PyObject *bufferstring = NULL;
#endif
if (!PyArg_ParseTuple(args, "O", &stream)) {
goto bad_type;
}
if (__read == NULL) {
__read = PyUnicode_FromString("read");
}
if (!PyObject_HasAttr(stream, __read)) {
goto bad_type;
}
buffer = PyObject_CallMethodObjArgs(stream, __read, NULL);
if (!buffer)
return NULL;
#ifdef IS_PYTHON3
bufferstring = PyUnicode_AsUTF8String(buffer);
if (!bufferstring)
return NULL;
#endif
decoder = PyObject_Call((PyObject *)(&YajlDecoderType), NULL, NULL);
if (decoder == NULL) {
return NULL;
}
#ifdef IS_PYTHON3
result = _internal_decode((_YajlDecoder *)decoder, PyBytes_AsString(bufferstring),
PyBytes_Size(bufferstring));
Py_XDECREF(bufferstring);
#else
result = _internal_decode((_YajlDecoder *)decoder, PyString_AsString(buffer),
PyString_Size(buffer));
#endif
Py_XDECREF(decoder);
Py_XDECREF(buffer);
return result;
bad_type:
PyErr_SetObject(PyExc_TypeError, PyUnicode_FromString("Must pass a single stream object"));
return NULL;
}
static PyObject *py_load(PYARGS)
{
return _internal_stream_load(args, 1);
}
static PyObject *py_iterload(PYARGS)
{
return _internal_stream_load(args, 0);
}
static PyObject *__write = NULL;
static PyObject *_internal_stream_dump(PyObject *object, PyObject *stream, unsigned int blocking,
yajl_gen_config config)
{
PyObject *encoder = NULL;
PyObject *buffer = NULL;
if (__write == NULL) {
__write = PyUnicode_FromString("write");
}
if (!PyObject_HasAttr(stream, __write)) {
goto bad_type;
}
encoder = PyObject_Call((PyObject *)(&YajlEncoderType), NULL, NULL);
if (encoder == NULL) {
return NULL;
}
buffer = _internal_encode((_YajlEncoder *)encoder, object, config);
PyObject_CallMethodObjArgs(stream, __write, buffer, NULL);
Py_XDECREF(encoder);
return Py_True;
bad_type:
PyErr_SetObject(PyExc_TypeError, PyUnicode_FromString("Must pass a stream object"));
return NULL;
}
static PyObject *py_dump(PYARGS)
{
PyObject *object = NULL;
PyObject *indent = NULL;
PyObject *stream = NULL;
PyObject *result = NULL;
yajl_gen_config config = { 0, NULL };
static char *kwlist[] = {"object", "stream", "indent", NULL};
char *spaces = NULL;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "OO|O", kwlist, &object, &stream, &indent)) {
return NULL;
}
spaces = __config_gen_config(indent, &config);
if (PyErr_Occurred()) {
return NULL;
}
result = _internal_stream_dump(object, stream, 0, config);
if (spaces) {
free(spaces);
}
return result;
}
static struct PyMethodDef yajl_methods[] = {
{"dumps", (PyCFunctionWithKeywords)(py_dumps), METH_VARARGS | METH_KEYWORDS,
"yajl.dumps(obj [, indent=None])\n\n\
Returns an encoded JSON string of the specified `obj`\n\
\n\
If `indent` is a non-negative integer, then JSON array elements \n\
and object members will be pretty-printed with that indent level. \n\
An indent level of 0 will only insert newlines. None (the default) \n\
selects the most compact representation.\n\
"},
{"loads", (PyCFunction)(py_loads), METH_VARARGS,
"yajl.loads(string)\n\n\
Returns a decoded object based on the given JSON `string`"},
{"load", (PyCFunction)(py_load), METH_VARARGS,
"yajl.load(fp)\n\n\
Returns a decoded object based on the JSON read from the `fp` stream-like\n\
object; *Note:* It is expected that `fp` supports the `read()` method"},
{"dump", (PyCFunctionWithKeywords)(py_dump), METH_VARARGS | METH_KEYWORDS,
"yajl.dump(obj, fp [, indent=None])\n\n\
Encodes the given `obj` and writes it to the `fp` stream-like object. \n\
*Note*: It is expected that `fp` supports the `write()` method\n\
\n\
If `indent` is a non-negative integer, then JSON array elements \n\
and object members will be pretty-printed with that indent level. \n\
An indent level of 0 will only insert newlines. None (the default) \n\
selects the most compact representation.\n\
"},
/*
{"iterload", (PyCFunction)(py_iterload), METH_VARARGS, NULL},
*/
{NULL}
};
#ifdef IS_PYTHON3
static struct PyModuleDef yajlmodule = {
PyModuleDef_HEAD_INIT,
"yajl",
#else
PyMODINIT_FUNC inityajl(void)
{
PyObject *module = Py_InitModule3("yajl", yajl_methods,
#endif
"Providing a pythonic interface to the yajl (Yet Another JSON Library) parser\n\n\
The interface is similar to that of simplejson or jsonlib providing a consistent syntax for JSON\n\
encoding and decoding. Unlike simplejson or jsonlib, yajl is **fast** :)\n\n\
The following benchmark was done on a dual core MacBook Pro with a fairly large (100K) JSON document:\n\
json.loads():\t\t21351.313ms\n\
simplejson.loads():\t1378.6492ms\n\
yajl.loads():\t\t502.4572ms\n\
\n\
json.dumps():\t\t7760.6348ms\n\
simplejson.dumps():\t930.9748ms\n\
yajl.dumps():\t\t681.0221ms"
#ifdef IS_PYTHON3
, -1, yajl_methods, NULL, NULL, NULL, NULL
};
PyMODINIT_FUNC PyInit_yajl(void)
{
PyObject *module = PyModule_Create(&yajlmodule);
#else
);
#endif
PyObject *version = PyUnicode_FromString(MOD_VERSION);
PyModule_AddObject(module, "__version__", version);
YajlDecoderType.tp_new = PyType_GenericNew;
if (PyType_Ready(&YajlDecoderType) < 0) {
goto bad_exit;
}
Py_INCREF(&YajlDecoderType);
PyModule_AddObject(module, "Decoder", (PyObject *)(&YajlDecoderType));
YajlEncoderType.tp_new = PyType_GenericNew;
if (PyType_Ready(&YajlEncoderType) < 0) {
goto bad_exit;
}
Py_INCREF(&YajlEncoderType);
PyModule_AddObject(module, "Encoder", (PyObject *)(&YajlEncoderType));
#ifdef IS_PYTHON3
return module;
#endif
bad_exit:
#ifdef IS_PYTHON3
return NULL;
#else
return;
#endif
}
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