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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2015 Red Hat Inc
*
* Author: John Spray <john.spray@redhat.com>
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#ifndef PY_FORMATTER_H_
#define PY_FORMATTER_H_
// Python.h comes first because otherwise it clobbers ceph's assert
#include <Python.h>
#include <stack>
#include <string>
#include <string_view>
#include <sstream>
#include <memory>
#include <list>
#include "common/Formatter.h"
#include "include/ceph_assert.h"
class PyFormatter : public ceph::Formatter
{
public:
PyFormatter (const PyFormatter&) = delete;
PyFormatter& operator= (const PyFormatter&) = delete;
PyFormatter(bool pretty = false, bool array = false)
{
// It is forbidden to instantiate me outside of the GIL,
// because I construct python objects right away
// Initialise cursor to an empty dict
if (!array) {
root = cursor = PyDict_New();
} else {
root = cursor = PyList_New(0);
}
}
~PyFormatter() override
{
cursor = NULL;
Py_DECREF(root);
root = NULL;
}
// Obscure, don't care.
void open_array_section_in_ns(std::string_view name, const char *ns) override
{ceph_abort();}
void open_object_section_in_ns(std::string_view name, const char *ns) override
{ceph_abort();}
void reset() override
{
const bool array = PyList_Check(root);
Py_DECREF(root);
if (array) {
root = cursor = PyList_New(0);
} else {
root = cursor = PyDict_New();
}
}
void set_status(int status, const char* status_name) override {}
void output_header() override {};
void output_footer() override {};
void enable_line_break() override {};
void open_array_section(std::string_view name) override;
void open_object_section(std::string_view name) override;
void close_section() override
{
ceph_assert(cursor != root);
ceph_assert(!stack.empty());
cursor = stack.top();
stack.pop();
}
void dump_bool(std::string_view name, bool b) override;
void dump_unsigned(std::string_view name, uint64_t u) override;
void dump_int(std::string_view name, int64_t u) override;
void dump_float(std::string_view name, double d) override;
void dump_string(std::string_view name, std::string_view s) override;
std::ostream& dump_stream(std::string_view name) override;
void dump_format_va(std::string_view name, const char *ns, bool quoted, const char *fmt, va_list ap) override;
void flush(std::ostream& os) override
{
// This class is not a serializer: this doesn't make sense
ceph_abort();
}
int get_len() const override
{
// This class is not a serializer: this doesn't make sense
ceph_abort();
return 0;
}
void write_raw_data(const char *data) override
{
// This class is not a serializer: this doesn't make sense
ceph_abort();
}
PyObject *get()
{
finish_pending_streams();
Py_INCREF(root);
return root;
}
void finish_pending_streams();
private:
PyObject *root;
PyObject *cursor;
std::stack<PyObject *> stack;
void dump_pyobject(std::string_view name, PyObject *p);
class PendingStream {
public:
PyObject *cursor;
std::string name;
std::stringstream stream;
};
std::list<std::shared_ptr<PendingStream> > pending_streams;
};
class PyJSONFormatter : public JSONFormatter {
public:
PyObject *get();
PyJSONFormatter (const PyJSONFormatter&) = default;
PyJSONFormatter(bool pretty=false, bool is_array=false) : JSONFormatter(pretty) {
if(is_array) {
open_array_section("");
} else {
open_object_section("");
}
}
private:
using json_formatter = JSONFormatter;
template <class T> void add_value(std::string_view name, T val);
void add_value(std::string_view name, std::string_view val, bool quoted);
};
#endif
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