Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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88 lines
3.6 KiB
88 lines
3.6 KiB
// Protocol Buffers - Google's data interchange format |
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// Copyright 2023 Google Inc. All rights reserved. |
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// https://developers.google.com/protocol-buffers/ |
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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 |
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// met: |
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// |
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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 |
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// copyright notice, this list of conditions and the following disclaimer |
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// in the documentation and/or other materials provided with the |
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// distribution. |
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// * Neither the name of Google Inc. nor the names of its |
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// contributors may be used to endorse or promote products derived from |
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// 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 |
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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// 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 |
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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// ----------------------------------------------------------------------------- |
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// Ruby Message functions. Strictly free of dependencies on |
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// Ruby interpreter internals. |
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#include "shared_message.h" |
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// Support function for Message_Hash. Returns a hash value for the given |
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// message. |
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uint64_t shared_Message_Hash(const upb_Message* msg, const upb_MessageDef* m, |
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uint64_t seed, upb_Status* status) { |
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upb_Arena* arena = upb_Arena_New(); |
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char* data; |
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size_t size; |
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// Hash a deterministically serialized payloads with no unknown fields. |
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upb_EncodeStatus encode_status = upb_Encode( |
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msg, upb_MessageDef_MiniTable(m), |
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kUpb_EncodeOption_SkipUnknown | kUpb_EncodeOption_Deterministic, arena, |
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&data, &size); |
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if (encode_status == kUpb_EncodeStatus_Ok) { |
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uint64_t ret = _upb_Hash(data, size, seed); |
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upb_Arena_Free(arena); |
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return ret; |
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} else { |
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upb_Arena_Free(arena); |
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upb_Status_SetErrorMessage(status, "Error calculating hash"); |
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} |
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} |
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// Support function for Message_Equal |
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bool shared_Message_Equal(const upb_Message* m1, const upb_Message* m2, |
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const upb_MessageDef* m, upb_Status* status) { |
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if (m1 == m2) return true; |
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size_t size1, size2; |
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int encode_opts = |
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kUpb_EncodeOption_SkipUnknown | kUpb_EncodeOption_Deterministic; |
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upb_Arena* arena_tmp = upb_Arena_New(); |
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const upb_MiniTable* layout = upb_MessageDef_MiniTable(m); |
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// Compare deterministically serialized payloads with no unknown fields. |
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char* data1; |
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char* data2; |
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upb_EncodeStatus status1 = |
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upb_Encode(m1, layout, encode_opts, arena_tmp, &data1, &size1); |
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upb_EncodeStatus status2 = |
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upb_Encode(m2, layout, encode_opts, arena_tmp, &data2, &size2); |
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if (status1 == kUpb_EncodeStatus_Ok && status2 == kUpb_EncodeStatus_Ok) { |
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bool ret = (size1 == size2) && (memcmp(data1, data2, size1) == 0); |
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upb_Arena_Free(arena_tmp); |
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return ret; |
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} else { |
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upb_Arena_Free(arena_tmp); |
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upb_Status_SetErrorMessage(status, "Error comparing messages"); |
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} |
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}
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