protobuf/upb/collections/map_gencode_util.h

/*
 * 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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 */

// These functions are only used by generated code.

#ifndef UPB_COLLECTIONS_MAP_GENCODE_UTIL_H_
#define UPB_COLLECTIONS_MAP_GENCODE_UTIL_H_

#include "upb/collections/map_internal.h"

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

#ifdef __cplusplus
extern "C" {
#endif

// Message map operations, these get the map from the message first.

UPB_INLINE size_t _upb_msg_map_size(const upb_Message* msg, size_t ofs) {
  upb_Map* map = *UPB_PTR_AT(msg, ofs, upb_Map*);
  return map ? _upb_Map_Size(map) : 0;
}

UPB_INLINE bool _upb_msg_map_get(const upb_Message* msg, size_t ofs,
                                 const void* key, size_t key_size, void* val,
                                 size_t val_size) {
  upb_Map* map = *UPB_PTR_AT(msg, ofs, upb_Map*);
  if (!map) return false;
  return _upb_Map_Get(map, key, key_size, val, val_size);
}

UPB_INLINE void* _upb_msg_map_next(const upb_Message* msg, size_t ofs,
                                   size_t* iter) {
  upb_Map* map = *UPB_PTR_AT(msg, ofs, upb_Map*);
  if (!map) return NULL;
  return _upb_map_next(map, iter);
}

UPB_INLINE bool _upb_msg_map_set(upb_Message* msg, size_t ofs, const void* key,
                                 size_t key_size, void* val, size_t val_size,
                                 upb_Arena* arena) {
  upb_Map** map = UPB_PTR_AT(msg, ofs, upb_Map*);
  if (!*map) {
    *map = _upb_Map_New(arena, key_size, val_size);
  }
  return _upb_Map_Insert(*map, key, key_size, val, val_size, arena) !=
         kUpb_MapInsertStatus_OutOfMemory;
}

UPB_INLINE bool _upb_msg_map_delete(upb_Message* msg, size_t ofs,
                                    const void* key, size_t key_size) {
  upb_Map* map = *UPB_PTR_AT(msg, ofs, upb_Map*);
  if (!map) return false;
  return _upb_Map_Delete(map, key, key_size);
}

UPB_INLINE void _upb_msg_map_clear(upb_Message* msg, size_t ofs) {
  upb_Map* map = *UPB_PTR_AT(msg, ofs, upb_Map*);
  if (!map) return;
  _upb_Map_Clear(map);
}

UPB_INLINE void _upb_msg_map_key(const void* msg, void* key, size_t size) {
  const upb_tabent* ent = (const upb_tabent*)msg;
  uint32_t u32len;
  upb_StringView k;
  k.data = upb_tabstr(ent->key, &u32len);
  k.size = u32len;
  _upb_map_fromkey(k, key, size);
}

UPB_INLINE void _upb_msg_map_value(const void* msg, void* val, size_t size) {
  const upb_tabent* ent = (const upb_tabent*)msg;
  upb_value v = {ent->val.val};
  _upb_map_fromvalue(v, val, size);
}

UPB_INLINE void _upb_msg_map_set_value(void* msg, const void* val,
                                       size_t size) {
  upb_tabent* ent = (upb_tabent*)msg;
  // This is like _upb_map_tovalue() except the entry already exists
  // so we can reuse the allocated upb_StringView for string fields.
  if (size == UPB_MAPTYPE_STRING) {
    upb_StringView* strp = (upb_StringView*)(uintptr_t)ent->val.val;
    memcpy(strp, val, sizeof(*strp));
  } else {
    memcpy(&ent->val.val, val, size);
  }
}

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

#include "upb/port/undef.inc"

#endif /* UPB_COLLECTIONS_MAP_GENCODE_UTIL_H_ */