Protocol Buffers - Google's data interchange format (grpc依赖) https://developers.google.com/protocol-buffers/
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/*
* Copyright (c) 2009-2021, Google LLC
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Google LLC nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL Google LLC BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef UPB_MINI_TABLE_FIELD_INTERNAL_H_
#define UPB_MINI_TABLE_FIELD_INTERNAL_H_
#include "upb/base/descriptor_constants.h"
#include "upb/mini_table/types.h"
// Must be last.
#include "upb/port/def.inc"
// LINT.IfChange(mini_table_field_layout)
struct upb_MiniTableField {
uint32_t number;
uint16_t offset;
int16_t presence; // If >0, hasbit_index. If <0, ~oneof_index
uint16_t submsg_index; // kUpb_NoSub if descriptortype != MESSAGE/GROUP/ENUM
uint8_t descriptortype;
// upb_FieldMode | upb_LabelFlags | (upb_FieldRep << kUpb_FieldRep_Shift)
uint8_t mode;
};
#define kUpb_NoSub ((uint16_t)-1)
typedef enum {
kUpb_FieldMode_Map = 0,
kUpb_FieldMode_Array = 1,
kUpb_FieldMode_Scalar = 2,
} upb_FieldMode;
// Mask to isolate the upb_FieldMode from field.mode.
#define kUpb_FieldMode_Mask 3
// Extra flags on the mode field.
typedef enum {
kUpb_LabelFlags_IsPacked = 4,
kUpb_LabelFlags_IsExtension = 8,
// Indicates that this descriptor type is an "alternate type":
// - for Int32, this indicates that the actual type is Enum (but was
// rewritten to Int32 because it is an open enum that requires no check).
// - for Bytes, this indicates that the actual type is String (but does
// not require any UTF-8 check).
kUpb_LabelFlags_IsAlternate = 16,
} upb_LabelFlags;
// Note: we sort by this number when calculating layout order.
typedef enum {
kUpb_FieldRep_1Byte = 0,
kUpb_FieldRep_4Byte = 1,
kUpb_FieldRep_StringView = 2,
kUpb_FieldRep_8Byte = 3,
kUpb_FieldRep_NativePointer =
UPB_SIZE(kUpb_FieldRep_4Byte, kUpb_FieldRep_8Byte),
kUpb_FieldRep_Max = kUpb_FieldRep_8Byte,
} upb_FieldRep;
#define kUpb_FieldRep_Shift 6
// LINT.ThenChange(//depot/google3/third_party/upb/js/impl/upb_bits/mini_table_field.ts:mini_table_field_layout)
UPB_INLINE upb_FieldRep
_upb_MiniTableField_GetRep(const upb_MiniTableField* field) {
return (upb_FieldRep)(field->mode >> kUpb_FieldRep_Shift);
}
#ifdef __cplusplus
extern "C" {
#endif
UPB_INLINE upb_FieldMode upb_FieldMode_Get(const upb_MiniTableField* field) {
return (upb_FieldMode)(field->mode & 3);
}
UPB_INLINE void _upb_MiniTableField_CheckIsArray(
const upb_MiniTableField* field) {
UPB_ASSUME(_upb_MiniTableField_GetRep(field) == kUpb_FieldRep_NativePointer);
UPB_ASSUME(upb_FieldMode_Get(field) == kUpb_FieldMode_Array);
UPB_ASSUME(field->presence == 0);
}
UPB_INLINE void _upb_MiniTableField_CheckIsMap(
const upb_MiniTableField* field) {
UPB_ASSUME(_upb_MiniTableField_GetRep(field) == kUpb_FieldRep_NativePointer);
UPB_ASSUME(upb_FieldMode_Get(field) == kUpb_FieldMode_Map);
UPB_ASSUME(field->presence == 0);
}
UPB_INLINE bool upb_IsRepeatedOrMap(const upb_MiniTableField* field) {
// This works because upb_FieldMode has no value 3.
return !(field->mode & kUpb_FieldMode_Scalar);
}
UPB_INLINE bool upb_IsSubMessage(const upb_MiniTableField* field) {
return field->descriptortype == kUpb_FieldType_Message ||
field->descriptortype == kUpb_FieldType_Group;
}
// LINT.IfChange(presence_logic)
// Hasbit access ///////////////////////////////////////////////////////////////
UPB_INLINE size_t _upb_hasbit_ofs(size_t idx) { return idx / 8; }
UPB_INLINE char _upb_hasbit_mask(size_t idx) { return 1 << (idx % 8); }
UPB_INLINE bool _upb_hasbit(const upb_Message* msg, size_t idx) {
return (*UPB_PTR_AT(msg, _upb_hasbit_ofs(idx), const char) &
_upb_hasbit_mask(idx)) != 0;
}
UPB_INLINE void _upb_sethas(const upb_Message* msg, size_t idx) {
(*UPB_PTR_AT(msg, _upb_hasbit_ofs(idx), char)) |= _upb_hasbit_mask(idx);
}
UPB_INLINE void _upb_clearhas(const upb_Message* msg, size_t idx) {
(*UPB_PTR_AT(msg, _upb_hasbit_ofs(idx), char)) &= ~_upb_hasbit_mask(idx);
}
UPB_INLINE size_t _upb_Message_Hasidx(const upb_MiniTableField* f) {
UPB_ASSERT(f->presence > 0);
return f->presence;
}
UPB_INLINE bool _upb_hasbit_field(const upb_Message* msg,
const upb_MiniTableField* f) {
return _upb_hasbit(msg, _upb_Message_Hasidx(f));
}
UPB_INLINE void _upb_sethas_field(const upb_Message* msg,
const upb_MiniTableField* f) {
_upb_sethas(msg, _upb_Message_Hasidx(f));
}
// Oneof case access ///////////////////////////////////////////////////////////
UPB_INLINE size_t _upb_oneofcase_ofs(const upb_MiniTableField* f) {
UPB_ASSERT(f->presence < 0);
return ~(ptrdiff_t)f->presence;
}
UPB_INLINE uint32_t* _upb_oneofcase_field(upb_Message* msg,
const upb_MiniTableField* f) {
return UPB_PTR_AT(msg, _upb_oneofcase_ofs(f), uint32_t);
}
UPB_INLINE uint32_t _upb_getoneofcase_field(const upb_Message* msg,
const upb_MiniTableField* f) {
return *_upb_oneofcase_field((upb_Message*)msg, f);
}
// LINT.ThenChange(GoogleInternalName2)
// LINT.ThenChange(//depot/google3/third_party/upb/js/impl/upb_bits/presence.ts:presence_logic)
#ifdef __cplusplus
} /* extern "C" */
#endif
#include "upb/port/undef.inc"
#endif /* UPB_MINI_TABLE_FIELD_INTERNAL_H_ */