Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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84 lines
3.5 KiB
84 lines
3.5 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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// Functions for linking MiniTables together once they are built from a |
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// MiniDescriptor. |
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// |
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// These functions have names like upb_MiniTable_Link() because they operate on |
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// MiniTables. We put them here, rather than in the mini_table/ directory, |
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// because they are only needed when building MiniTables from MiniDescriptors. |
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// The interfaces in mini_table/ assume that MiniTables are immutable. |
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#ifndef UPB_MINI_DESCRIPTOR_LINK_H_ |
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#define UPB_MINI_DESCRIPTOR_LINK_H_ |
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#include "upb/base/status.h" |
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#include "upb/mem/arena.h" |
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#include "upb/mini_table/enum.h" |
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#include "upb/mini_table/field.h" |
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#include "upb/mini_table/message.h" |
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#include "upb/mini_table/sub.h" |
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// Must be last. |
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#include "upb/port/def.inc" |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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// Links a sub-message field to a MiniTable for that sub-message. If a |
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// sub-message field is not linked, it will be treated as an unknown field |
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// during parsing, and setting the field will not be allowed. It is possible |
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// to link the message field later, at which point it will no longer be treated |
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// as unknown. However there is no synchronization for this operation, which |
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// means parallel mutation requires external synchronization. |
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// Returns success/failure. |
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UPB_API bool upb_MiniTable_SetSubMessage(upb_MiniTable* table, |
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upb_MiniTableField* field, |
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const upb_MiniTable* sub); |
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// Links an enum field to a MiniTable for that enum. |
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// All enum fields must be linked prior to parsing. |
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// Returns success/failure. |
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UPB_API bool upb_MiniTable_SetSubEnum(upb_MiniTable* table, |
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upb_MiniTableField* field, |
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const upb_MiniTableEnum* sub); |
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// Returns a list of fields that require linking at runtime, to connect the |
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// MiniTable to its sub-messages and sub-enums. The list of fields will be |
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// written to the `subs` array, which must have been allocated by the caller |
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// and must be large enough to hold a list of all fields in the message. |
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// |
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// The order of the fields returned by this function is significant: it matches |
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// the order expected by upb_MiniTable_Link() below. |
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// |
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// The return value packs the sub-message count and sub-enum count into a single |
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// integer like so: |
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// return (msg_count << 16) | enum_count; |
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UPB_API uint32_t upb_MiniTable_GetSubList(const upb_MiniTable* mt, |
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const upb_MiniTableField** subs); |
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// Links a message to its sub-messages and sub-enums. The caller must pass |
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// arrays of sub-tables and sub-enums, in the same length and order as is |
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// returned by upb_MiniTable_GetSubList() above. However, individual elements |
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// of the sub_tables may be NULL if those sub-messages were tree shaken. |
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// |
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// Returns false if either array is too short, or if any of the tables fails |
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// to link. |
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UPB_API bool upb_MiniTable_Link(upb_MiniTable* mt, |
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const upb_MiniTable** sub_tables, |
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size_t sub_table_count, |
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const upb_MiniTableEnum** sub_enums, |
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size_t sub_enum_count); |
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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_DESCRIPTOR_LINK_H_
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