/*
 * Copyright (c) 2009-2021, Google LLC
 * 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 LLC 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 Google LLC 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 UPB_COLLECTIONS_ARRAY_H_
#define UPB_COLLECTIONS_ARRAY_H_

#include "upb/base/descriptor_constants.h"
#include "upb/collections/message_value.h"
#include "upb/mem/arena.h"

// Must be last.
#include "upb/port/def.inc"

#ifdef __cplusplus
extern "C" {
#endif

// Creates a new array on the given arena that holds elements of this type.
UPB_API upb_Array* upb_Array_New(upb_Arena* a, upb_CType type);

// Returns the number of elements in the array.
UPB_API size_t upb_Array_Size(const upb_Array* arr);

// Returns the given element, which must be within the array's current size.
UPB_API upb_MessageValue upb_Array_Get(const upb_Array* arr, size_t i);

// Sets the given element, which must be within the array's current size.
UPB_API void upb_Array_Set(upb_Array* arr, size_t i, upb_MessageValue val);

// Appends an element to the array. Returns false on allocation failure.
UPB_API bool upb_Array_Append(upb_Array* array, upb_MessageValue val,
                              upb_Arena* arena);

// Moves elements within the array using memmove().
// Like memmove(), the source and destination elements may be overlapping.
UPB_API void upb_Array_Move(upb_Array* array, size_t dst_idx, size_t src_idx,
                            size_t count);

// Inserts one or more empty elements into the array.
// Existing elements are shifted right.
// The new elements have undefined state and must be set with `upb_Array_Set()`.
// REQUIRES: `i <= upb_Array_Size(arr)`
UPB_API bool upb_Array_Insert(upb_Array* array, size_t i, size_t count,
                              upb_Arena* arena);

// Deletes one or more elements from the array.
// Existing elements are shifted left.
// REQUIRES: `i + count <= upb_Array_Size(arr)`
UPB_API void upb_Array_Delete(upb_Array* array, size_t i, size_t count);

// Changes the size of a vector. New elements are initialized to NULL/0.
// Returns false on allocation failure.
UPB_API bool upb_Array_Resize(upb_Array* array, size_t size, upb_Arena* arena);

#ifdef __cplusplus
} /* extern "C" */
#endif

#include "upb/port/undef.inc"

#endif /* UPB_COLLECTIONS_ARRAY_H_ */