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 * 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
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 */

#ifndef UPB_ARRAY_H_
#define UPB_ARRAY_H_

#include "upb/message_value.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_Array* upb_Array_New(upb_Arena* a, upb_CType type);

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

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

/* Appends an element to the array.  Returns false on allocation failure. */
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. */
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)` */
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)` */
void upb_Array_Delete(upb_Array* array, size_t i, size_t count);

/* Changes the size of a vector.  New elements are initialized to empty/0.
 * Returns false on allocation failure. */
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_ARRAY_H_ */