Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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41 lines
1.4 KiB
41 lines
1.4 KiB
// Protocol Buffers - Google's data interchange format |
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// Copyright 2023 Google LLC. All rights reserved. |
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// |
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// Use of this source code is governed by a BSD-style |
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// license that can be found in the LICENSE file or at |
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// https://developers.google.com/open-source/licenses/bsd |
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#ifndef UPB_MESSAGE_INTERNAL_MAP_ENTRY_H_ |
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#define UPB_MESSAGE_INTERNAL_MAP_ENTRY_H_ |
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#include <stdint.h> |
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#include "upb/base/string_view.h" |
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#include "upb/hash/common.h" |
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#include "upb/message/internal/types.h" |
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// Map entries aren't actually stored for map fields, they are only used during |
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// parsing. (It helps a lot if all map entry messages have the same layout.) |
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// The mini_table layout code will ensure that all map entries have this layout. |
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// |
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// Note that users can and do create map entries directly, which will also use |
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// this layout. |
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typedef struct { |
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struct upb_Message message; |
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// We only need 2 hasbits max, but due to alignment we'll use 8 bytes here, |
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// and the uint64_t helps make this clear. |
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uint64_t hasbits; |
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union { |
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upb_StringView str; // For str/bytes. |
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upb_value val; // For all other types. |
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double d[2]; // Padding for 32-bit builds. |
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} k; |
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union { |
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upb_StringView str; // For str/bytes. |
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upb_value val; // For all other types. |
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double d[2]; // Padding for 32-bit builds. |
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} v; |
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} upb_MapEntry; |
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#endif // UPB_MESSAGE_INTERNAL_MAP_ENTRY_H_
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