Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
103 lines
4.0 KiB
103 lines
4.0 KiB
2 years ago
|
/*
|
||
|
|
* 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_MESSAGE_INTERNAL_H_
|
||
|
|
#define UPB_MINI_TABLE_MESSAGE_INTERNAL_H_
|
||
|
|
|
||
|
|
#include "upb/mini_table/types.h"
|
||
|
|
|
||
|
|
// Must be last.
|
||
|
|
#include "upb/port/def.inc"
|
||
|
|
|
||
|
|
struct upb_Decoder;
|
||
|
|
typedef const char* _upb_FieldParser(struct upb_Decoder* d, const char* ptr,
|
||
|
|
upb_Message* msg, intptr_t table,
|
||
|
|
uint64_t hasbits, uint64_t data);
|
||
|
|
typedef struct {
|
||
|
|
uint64_t field_data;
|
||
|
|
_upb_FieldParser* field_parser;
|
||
|
|
} _upb_FastTable_Entry;
|
||
|
|
|
||
|
|
typedef enum {
|
||
|
|
kUpb_ExtMode_NonExtendable = 0, // Non-extendable message.
|
||
|
|
kUpb_ExtMode_Extendable = 1, // Normal extendable message.
|
||
|
|
kUpb_ExtMode_IsMessageSet = 2, // MessageSet message.
|
||
|
|
kUpb_ExtMode_IsMessageSet_ITEM =
|
||
|
|
3, // MessageSet item (temporary only, see decode.c)
|
||
|
|
|
||
|
|
// During table building we steal a bit to indicate that the message is a map
|
||
|
|
// entry. *Only* used during table building!
|
||
|
|
kUpb_ExtMode_IsMapEntry = 4,
|
||
|
|
} upb_ExtMode;
|
||
|
|
|
||
|
|
// upb_MiniTable represents the memory layout of a given upb_MessageDef.
|
||
|
|
// The members are public so generated code can initialize them,
|
||
|
|
// but users MUST NOT directly read or write any of its members.
|
||
|
|
struct upb_MiniTable {
|
||
|
|
const upb_MiniTableSub* subs;
|
||
|
|
const upb_MiniTableField* fields;
|
||
|
|
|
||
|
|
// Must be aligned to sizeof(void*). Doesn't include internal members like
|
||
|
|
// unknown fields, extension dict, pointer to msglayout, etc.
|
||
|
|
uint16_t size;
|
||
|
|
|
||
|
|
uint16_t field_count;
|
||
|
|
uint8_t ext; // upb_ExtMode, declared as uint8_t so sizeof(ext) == 1
|
||
|
|
uint8_t dense_below;
|
||
|
|
uint8_t table_mask;
|
||
|
|
uint8_t required_count; // Required fields have the lowest hasbits.
|
||
|
|
|
||
|
|
// To statically initialize the tables of variable length, we need a flexible
|
||
|
|
// array member, and we need to compile in gnu99 mode (constant initialization
|
||
|
|
// of flexible array members is a GNU extension, not in C99 unfortunately.
|
||
|
|
_upb_FastTable_Entry fasttable[];
|
||
|
|
};
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
extern "C" {
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// Computes a bitmask in which the |l->required_count| lowest bits are set,
|
||
|
|
// except that we skip the lowest bit (because upb never uses hasbit 0).
|
||
|
|
//
|
||
|
|
// Sample output:
|
||
|
|
// requiredmask(1) => 0b10 (0x2)
|
||
|
|
// requiredmask(5) => 0b111110 (0x3e)
|
||
|
|
UPB_INLINE uint64_t upb_MiniTable_requiredmask(const upb_MiniTable* l) {
|
||
|
|
int n = l->required_count;
|
||
|
|
assert(0 < n && n <= 63);
|
||
|
|
return ((1ULL << n) - 1) << 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
} /* extern "C" */
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include "upb/port/undef.inc"
|
||
|
|
|
||
|
|
#endif /* UPB_MINI_TABLE_MESSAGE_INTERNAL_H_ */
|