Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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188 lines
6.5 KiB
188 lines
6.5 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_MINI_TABLE_FIELD_INTERNAL_H_ |
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#define UPB_MINI_TABLE_FIELD_INTERNAL_H_ |
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#include "upb/base/descriptor_constants.h" |
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#include "upb/mini_table/types.h" |
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// Must be last. |
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#include "upb/port/def.inc" |
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// LINT.IfChange(mini_table_field_layout) |
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struct upb_MiniTableField { |
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uint32_t number; |
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uint16_t offset; |
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int16_t presence; // If >0, hasbit_index. If <0, ~oneof_index |
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uint16_t submsg_index; // kUpb_NoSub if descriptortype != MESSAGE/GROUP/ENUM |
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uint8_t descriptortype; |
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// upb_FieldMode | upb_LabelFlags | (upb_FieldRep << kUpb_FieldRep_Shift) |
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uint8_t mode; |
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}; |
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#define kUpb_NoSub ((uint16_t)-1) |
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typedef enum { |
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kUpb_FieldMode_Map = 0, |
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kUpb_FieldMode_Array = 1, |
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kUpb_FieldMode_Scalar = 2, |
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} upb_FieldMode; |
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// Mask to isolate the upb_FieldMode from field.mode. |
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#define kUpb_FieldMode_Mask 3 |
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// Extra flags on the mode field. |
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typedef enum { |
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kUpb_LabelFlags_IsPacked = 4, |
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kUpb_LabelFlags_IsExtension = 8, |
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// Indicates that this descriptor type is an "alternate type": |
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// - for Int32, this indicates that the actual type is Enum (but was |
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// rewritten to Int32 because it is an open enum that requires no check). |
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// - for Bytes, this indicates that the actual type is String (but does |
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// not require any UTF-8 check). |
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kUpb_LabelFlags_IsAlternate = 16, |
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} upb_LabelFlags; |
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// Note: we sort by this number when calculating layout order. |
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typedef enum { |
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kUpb_FieldRep_1Byte = 0, |
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kUpb_FieldRep_4Byte = 1, |
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kUpb_FieldRep_StringView = 2, |
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kUpb_FieldRep_8Byte = 3, |
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kUpb_FieldRep_NativePointer = |
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UPB_SIZE(kUpb_FieldRep_4Byte, kUpb_FieldRep_8Byte), |
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kUpb_FieldRep_Max = kUpb_FieldRep_8Byte, |
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} upb_FieldRep; |
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#define kUpb_FieldRep_Shift 6 |
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// LINT.ThenChange(//depot/google3/third_party/upb/js/impl/upb_bits/mini_table_field.ts:mini_table_field_layout) |
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UPB_INLINE upb_FieldRep |
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_upb_MiniTableField_GetRep(const upb_MiniTableField* field) { |
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return (upb_FieldRep)(field->mode >> kUpb_FieldRep_Shift); |
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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 upb_FieldMode upb_FieldMode_Get(const upb_MiniTableField* field) { |
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return (upb_FieldMode)(field->mode & 3); |
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} |
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UPB_INLINE void _upb_MiniTableField_CheckIsArray( |
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const upb_MiniTableField* field) { |
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UPB_ASSUME(_upb_MiniTableField_GetRep(field) == kUpb_FieldRep_NativePointer); |
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UPB_ASSUME(upb_FieldMode_Get(field) == kUpb_FieldMode_Array); |
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UPB_ASSUME(field->presence == 0); |
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} |
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UPB_INLINE void _upb_MiniTableField_CheckIsMap( |
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const upb_MiniTableField* field) { |
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UPB_ASSUME(_upb_MiniTableField_GetRep(field) == kUpb_FieldRep_NativePointer); |
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UPB_ASSUME(upb_FieldMode_Get(field) == kUpb_FieldMode_Map); |
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UPB_ASSUME(field->presence == 0); |
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} |
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UPB_INLINE bool upb_IsRepeatedOrMap(const upb_MiniTableField* field) { |
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// This works because upb_FieldMode has no value 3. |
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return !(field->mode & kUpb_FieldMode_Scalar); |
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} |
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UPB_INLINE bool upb_IsSubMessage(const upb_MiniTableField* field) { |
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return field->descriptortype == kUpb_FieldType_Message || |
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field->descriptortype == kUpb_FieldType_Group; |
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} |
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// LINT.IfChange(presence_logic) |
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// Hasbit access /////////////////////////////////////////////////////////////// |
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UPB_INLINE size_t _upb_hasbit_ofs(size_t idx) { return idx / 8; } |
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UPB_INLINE char _upb_hasbit_mask(size_t idx) { return 1 << (idx % 8); } |
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UPB_INLINE bool _upb_hasbit(const upb_Message* msg, size_t idx) { |
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return (*UPB_PTR_AT(msg, _upb_hasbit_ofs(idx), const char) & |
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_upb_hasbit_mask(idx)) != 0; |
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} |
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UPB_INLINE void _upb_sethas(const upb_Message* msg, size_t idx) { |
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(*UPB_PTR_AT(msg, _upb_hasbit_ofs(idx), char)) |= _upb_hasbit_mask(idx); |
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} |
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UPB_INLINE void _upb_clearhas(const upb_Message* msg, size_t idx) { |
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(*UPB_PTR_AT(msg, _upb_hasbit_ofs(idx), char)) &= ~_upb_hasbit_mask(idx); |
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} |
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UPB_INLINE size_t _upb_Message_Hasidx(const upb_MiniTableField* f) { |
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UPB_ASSERT(f->presence > 0); |
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return f->presence; |
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} |
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UPB_INLINE bool _upb_hasbit_field(const upb_Message* msg, |
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const upb_MiniTableField* f) { |
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return _upb_hasbit(msg, _upb_Message_Hasidx(f)); |
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} |
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UPB_INLINE void _upb_sethas_field(const upb_Message* msg, |
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const upb_MiniTableField* f) { |
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_upb_sethas(msg, _upb_Message_Hasidx(f)); |
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} |
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// Oneof case access /////////////////////////////////////////////////////////// |
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UPB_INLINE size_t _upb_oneofcase_ofs(const upb_MiniTableField* f) { |
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UPB_ASSERT(f->presence < 0); |
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return ~(ptrdiff_t)f->presence; |
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} |
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UPB_INLINE uint32_t* _upb_oneofcase_field(upb_Message* msg, |
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const upb_MiniTableField* f) { |
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return UPB_PTR_AT(msg, _upb_oneofcase_ofs(f), uint32_t); |
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} |
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UPB_INLINE uint32_t _upb_getoneofcase_field(const upb_Message* msg, |
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const upb_MiniTableField* f) { |
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return *_upb_oneofcase_field((upb_Message*)msg, f); |
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} |
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// LINT.ThenChange(GoogleInternalName2) |
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// LINT.ThenChange(//depot/google3/third_party/upb/js/impl/upb_bits/presence.ts:presence_logic) |
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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_FIELD_INTERNAL_H_ */
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