Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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67 lines
2.7 KiB
67 lines
2.7 KiB
2 years ago
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/*
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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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#include "upb/wire/reader.h"
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// Must be last.
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#include "upb/port/def.inc"
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#include "upb/wire/eps_copy_input_stream.h"
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#include "upb/wire/types.h"
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UPB_NOINLINE _upb_WireReader_ReadLongVarintRet
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_upb_WireReader_ReadLongVarint(const char* ptr, uint64_t val) {
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_upb_WireReader_ReadLongVarintRet ret = {NULL, 0};
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uint64_t byte;
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int i;
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for (i = 1; i < 10; i++) {
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byte = (uint8_t)ptr[i];
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val += (byte - 1) << (i * 7);
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if (!(byte & 0x80)) {
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ret.ptr = ptr + i + 1;
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ret.val = val;
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return ret;
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}
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}
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return ret;
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}
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const char* upb_WireReader_SkipGroup(const char* ptr, uint32_t tag,
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int depth_limit,
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upb_EpsCopyInputStream* stream) {
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if (--depth_limit == 0) return NULL;
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uint32_t end_group_tag = (tag & ~7ULL) | kUpb_WireType_EndGroup;
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while (!upb_EpsCopyInputStream_IsDone(stream, &ptr)) {
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uint32_t tag;
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ptr = upb_WireReader_ReadTag(ptr, &tag);
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if (!ptr) return NULL;
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if (tag == end_group_tag) return ptr;
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ptr = upb_WireReader_SkipValue(ptr, tag, depth_limit, stream);
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if (!ptr) return NULL;
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}
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return ptr;
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}
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