grpc/src/core/json/json.h

/*
 *
 * Copyright 2014, Google Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name of Google Inc. 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 COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "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 COPYRIGHT
 * OWNER OR CONTRIBUTORS 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.
 *
 */

#ifndef __GRPC_SRC_CORE_JSON_JSON_H__
#define __GRPC_SRC_CORE_JSON_JSON_H__

#include <stdlib.h>

#include "src/core/json/json_common.h"

/* A tree-like structure to hold json values. The key and value pointers
 * are not owned by it.
 */
typedef struct grpc_json {
  struct grpc_json* next;
  struct grpc_json* prev;
  struct grpc_json* child;
  struct grpc_json* parent;

  grpc_json_type type;
  const char* key;
  const char* value;
} grpc_json;

/* The next two functions are going to parse the input string, and
 * destroy it in the process, in order to use its space to store
 * all of the keys and values for the returned object tree.
 *
 * They assume UTF-8 input stream, and will output UTF-8 encoded
 * strings in the tree. The input stream's UTF-8 isn't validated,
 * as in, what you input is what you get as an output.
 *
 * All the keys and values in the grpc_json_t objects will be strings
 * pointing at your input buffer.
 *
 * Delete the allocated tree afterward using grpc_json_destroy().
 */
grpc_json* grpc_json_parse_string_with_len(char* input, size_t size);
grpc_json* grpc_json_parse_string(char* input);

/* This function will create a new string using gpr_realloc, and will
 * deserialize the grpc_json tree into it. It'll be zero-terminated,
 * but will be allocated in chunks of 256 bytes.
 *
 * The indent parameter controls the way the output is formatted.
 * If indent is 0, then newlines will be suppressed as well, and the
 * output will be condensed at its maximum.
 */
char* grpc_json_dump_to_string(grpc_json* json, int indent);

/* Use these to create or delete a grpc_json object.
 * Deletion is recursive. We will not attempt to free any of the strings
 * in any of the objects of that tree.
 */
grpc_json* grpc_json_create(grpc_json_type type);
void grpc_json_destroy(grpc_json* json);

#endif /* __GRPC_SRC_CORE_JSON_JSON_H__ */