Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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69 lines
2.4 KiB
69 lines
2.4 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/internal/atoi.h"
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// Must be last.
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#include "upb/port_def.inc"
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const char* upb_BufToUint64(const char* ptr, const char* end, uint64_t* val) {
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uint64_t u64 = 0;
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while (ptr < end) {
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unsigned ch = *ptr - '0';
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if (ch >= 10) break;
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if (u64 > UINT64_MAX / 10 || u64 * 10 > UINT64_MAX - ch) {
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return NULL; // integer overflow
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}
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u64 *= 10;
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u64 += ch;
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ptr++;
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}
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*val = u64;
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return ptr;
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}
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const char* upb_BufToInt64(const char* ptr, const char* end, int64_t* val,
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bool* is_neg) {
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bool neg = false;
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uint64_t u64;
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if (ptr != end && *ptr == '-') {
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ptr++;
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neg = true;
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}
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ptr = upb_BufToUint64(ptr, end, &u64);
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if (!ptr || u64 > (uint64_t)INT64_MAX + neg) {
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return NULL; // integer overflow
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}
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*val = neg ? -u64 : u64;
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if (is_neg) *is_neg = neg;
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return ptr;
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}
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