Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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57 lines
1.7 KiB
57 lines
1.7 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_MINI_TABLE_INTERNAL_ENUM_H_ |
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#define UPB_MINI_TABLE_INTERNAL_ENUM_H_ |
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#include <stdint.h> |
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// Must be last. |
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#include "upb/port/def.inc" |
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struct upb_MiniTableEnum { |
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uint32_t UPB_PRIVATE(mask_limit); // Highest that can be tested with mask. |
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uint32_t UPB_PRIVATE(value_count); // Number of values after the bitfield. |
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uint32_t UPB_PRIVATE(data)[]; // Bitmask + enumerated values follow. |
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}; |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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UPB_INLINE bool UPB_PRIVATE(_upb_MiniTableEnum_CheckValue)( |
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const struct upb_MiniTableEnum* e, uint32_t val) { |
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if (UPB_LIKELY(val < 64)) { |
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const uint64_t mask = |
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e->UPB_PRIVATE(data)[0] | ((uint64_t)e->UPB_PRIVATE(data)[1] << 32); |
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const uint64_t bit = 1ULL << val; |
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return (mask & bit) != 0; |
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} |
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if (UPB_LIKELY(val < e->UPB_PRIVATE(mask_limit))) { |
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const uint32_t mask = e->UPB_PRIVATE(data)[val / 32]; |
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const uint32_t bit = 1ULL << (val % 32); |
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return (mask & bit) != 0; |
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} |
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// OPT: binary search long lists? |
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const uint32_t* start = |
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&e->UPB_PRIVATE(data)[e->UPB_PRIVATE(mask_limit) / 32]; |
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const uint32_t* limit = &e->UPB_PRIVATE( |
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data)[e->UPB_PRIVATE(mask_limit) / 32 + e->UPB_PRIVATE(value_count)]; |
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for (const uint32_t* p = start; p < limit; p++) { |
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if (*p == val) return true; |
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} |
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return false; |
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} |
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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_MINI_TABLE_INTERNAL_ENUM_H_ */
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