Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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83 lines
3.4 KiB
83 lines
3.4 KiB
/* |
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* Copyright (c) 2009-2021, Google LLC |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* * Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* * Neither the name of Google LLC nor the |
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* names of its contributors may be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL Google LLC BE LIABLE FOR ANY DIRECT, |
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#ifndef UPB_MESSAGE_EXTENSION_INTERNAL_H_ |
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#define UPB_MESSAGE_EXTENSION_INTERNAL_H_ |
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#include "upb/base/descriptor_constants.h" |
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#include "upb/base/string_view.h" |
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#include "upb/mem/arena.h" |
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#include "upb/message/message.h" |
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#include "upb/mini_table/extension.h" |
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// Must be last. |
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#include "upb/port/def.inc" |
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// The internal representation of an extension is self-describing: it contains |
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// enough information that we can serialize it to binary format without needing |
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// to look it up in a upb_ExtensionRegistry. |
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// |
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// This representation allocates 16 bytes to data on 64-bit platforms. |
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// This is rather wasteful for scalars (in the extreme case of bool, |
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// it wastes 15 bytes). We accept this because we expect messages to be |
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// the most common extension type. |
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typedef struct { |
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const upb_MiniTableExtension* ext; |
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union { |
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upb_StringView str; |
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void* ptr; |
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char scalar_data[8]; |
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} data; |
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} upb_Message_Extension; |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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// Adds the given extension data to the given message. |
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// |ext| is copied into the message instance. |
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// This logically replaces any previously-added extension with this number. |
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upb_Message_Extension* _upb_Message_GetOrCreateExtension( |
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upb_Message* msg, const upb_MiniTableExtension* ext, upb_Arena* arena); |
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// Returns an array of extensions for this message. |
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// Note: the array is ordered in reverse relative to the order of creation. |
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const upb_Message_Extension* _upb_Message_Getexts(const upb_Message* msg, |
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size_t* count); |
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// Returns an extension for the given field number, or NULL if no extension |
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// exists for this field number. |
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const upb_Message_Extension* _upb_Message_Getext( |
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const upb_Message* msg, const upb_MiniTableExtension* ext); |
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#ifdef __cplusplus |
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} /* extern "C" */ |
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#endif |
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#include "upb/port/undef.inc" |
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#endif /* UPB_MESSAGE_EXTENSION_INTERNAL_H_ */
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