Protocol Buffers - Google's data interchange format (grpc依赖)
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112 lines
3.2 KiB
112 lines
3.2 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_FIELD_H_ |
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#define UPB_MINI_TABLE_INTERNAL_FIELD_H_ |
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#include <stddef.h> |
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#include <stdint.h> |
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#include "upb/base/descriptor_constants.h" |
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#include "upb/mini_table/internal/size_log2.h" |
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// Must be last. |
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#include "upb/port/def.inc" |
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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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// Indexes into `upb_MiniTable.subs` |
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// Will be set to `kUpb_NoSub` if `descriptortype` != MESSAGE/GROUP/ENUM |
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uint16_t UPB_PRIVATE(submsg_index); |
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uint8_t UPB_PRIVATE(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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UPB_INLINE upb_FieldRep |
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_upb_MiniTableField_GetRep(const struct 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 |
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upb_FieldMode_Get(const struct 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 struct 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 struct 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 size_t |
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_upb_MiniTableField_ElemSizeLg2(const struct upb_MiniTableField* field) { |
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return upb_FieldType_SizeLg2( |
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(upb_FieldType)field->UPB_PRIVATE(descriptortype)); |
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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_FIELD_H_ */
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