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2025-08-15 15:56:40 +08:00
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protobuf/objectivec/GPBDescriptor_PackagePrivate.h Normal file
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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// 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 Inc. 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 THE COPYRIGHT
// OWNER OR CONTRIBUTORS 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.
// This header is private to the ProtobolBuffers library and must NOT be
// included by any sources outside this library. The contents of this file are
// subject to change at any time without notice.
#import "GPBDescriptor.h"
#import "GPBWireFormat.h"
// Describes attributes of the field.
typedef NS_OPTIONS(uint16_t, GPBFieldFlags) {
GPBFieldNone = 0,
// These map to standard protobuf concepts.
GPBFieldRequired = 1 << 0,
GPBFieldRepeated = 1 << 1,
GPBFieldPacked = 1 << 2,
GPBFieldOptional = 1 << 3,
GPBFieldHasDefaultValue = 1 << 4,
// Indicates the field needs custom handling for the TextFormat name, if not
// set, the name can be derived from the ObjC name.
GPBFieldTextFormatNameCustom = 1 << 6,
// Indicates the field has an enum descriptor.
GPBFieldHasEnumDescriptor = 1 << 7,
// These are not standard protobuf concepts, they are specific to the
// Objective C runtime.
// These bits are used to mark the field as a map and what the key
// type is.
GPBFieldMapKeyMask = 0xF << 8,
GPBFieldMapKeyInt32 = 1 << 8,
GPBFieldMapKeyInt64 = 2 << 8,
GPBFieldMapKeyUInt32 = 3 << 8,
GPBFieldMapKeyUInt64 = 4 << 8,
GPBFieldMapKeySInt32 = 5 << 8,
GPBFieldMapKeySInt64 = 6 << 8,
GPBFieldMapKeyFixed32 = 7 << 8,
GPBFieldMapKeyFixed64 = 8 << 8,
GPBFieldMapKeySFixed32 = 9 << 8,
GPBFieldMapKeySFixed64 = 10 << 8,
GPBFieldMapKeyBool = 11 << 8,
GPBFieldMapKeyString = 12 << 8,
};
// NOTE: The structures defined here have their members ordered to minimize
// their size. This directly impacts the size of apps since these exist per
// field/extension.
// Describes a single field in a protobuf as it is represented as an ivar.
typedef struct GPBMessageFieldDescription {
// Name of ivar.
const char *name;
union {
const char *className; // Name for message class.
// For enums only: If EnumDescriptors are compiled in, it will be that,
// otherwise it will be the verifier.
GPBEnumDescriptorFunc enumDescFunc;
GPBEnumValidationFunc enumVerifier;
} dataTypeSpecific;
// The field number for the ivar.
uint32_t number;
// The index (in bits) into _has_storage_.
// >= 0: the bit to use for a value being set.
// = GPBNoHasBit(INT32_MAX): no storage used.
// < 0: in a oneOf, use a full int32 to record the field active.
int32_t hasIndex;
// Offset of the variable into it's structure struct.
uint32_t offset;
// Field flags. Use accessor functions below.
GPBFieldFlags flags;
// Data type of the ivar.
GPBDataType dataType;
} GPBMessageFieldDescription;
// Fields in messages defined in a 'proto2' syntax file can provide a default
// value. This struct provides the default along with the field info.
typedef struct GPBMessageFieldDescriptionWithDefault {
// Default value for the ivar.
GPBGenericValue defaultValue;
GPBMessageFieldDescription core;
} GPBMessageFieldDescriptionWithDefault;
// Describes attributes of the extension.
typedef NS_OPTIONS(uint8_t, GPBExtensionOptions) {
GPBExtensionNone = 0,
// These map to standard protobuf concepts.
GPBExtensionRepeated = 1 << 0,
GPBExtensionPacked = 1 << 1,
GPBExtensionSetWireFormat = 1 << 2,
};
// An extension
typedef struct GPBExtensionDescription {
GPBGenericValue defaultValue;
const char *singletonName;
const char *extendedClass;
const char *messageOrGroupClassName;
GPBEnumDescriptorFunc enumDescriptorFunc;
int32_t fieldNumber;
GPBDataType dataType;
GPBExtensionOptions options;
} GPBExtensionDescription;
typedef NS_OPTIONS(uint32_t, GPBDescriptorInitializationFlags) {
GPBDescriptorInitializationFlag_None = 0,
GPBDescriptorInitializationFlag_FieldsWithDefault = 1 << 0,
GPBDescriptorInitializationFlag_WireFormat = 1 << 1,
};
@interface GPBDescriptor () {
@package
NSArray *fields_;
NSArray *oneofs_;
uint32_t storageSize_;
}
// fieldDescriptions have to be long lived, they are held as raw pointers.
+ (instancetype)
allocDescriptorForClass:(Class)messageClass
rootClass:(Class)rootClass
file:(GPBFileDescriptor *)file
fields:(void *)fieldDescriptions
fieldCount:(uint32_t)fieldCount
storageSize:(uint32_t)storageSize
flags:(GPBDescriptorInitializationFlags)flags;
- (instancetype)initWithClass:(Class)messageClass
file:(GPBFileDescriptor *)file
fields:(NSArray *)fields
storageSize:(uint32_t)storage
wireFormat:(BOOL)wireFormat;
// Called right after init to provide extra information to avoid init having
// an explosion of args. These pointers are recorded, so they are expected
// to live for the lifetime of the app.
- (void)setupOneofs:(const char **)oneofNames
count:(uint32_t)count
firstHasIndex:(int32_t)firstHasIndex;
- (void)setupExtraTextInfo:(const char *)extraTextFormatInfo;
- (void)setupExtensionRanges:(const GPBExtensionRange *)ranges count:(int32_t)count;
- (void)setupContainingMessageClassName:(const char *)msgClassName;
- (void)setupMessageClassNameSuffix:(NSString *)suffix;
@end
@interface GPBFileDescriptor ()
- (instancetype)initWithPackage:(NSString *)package
objcPrefix:(NSString *)objcPrefix
syntax:(GPBFileSyntax)syntax;
- (instancetype)initWithPackage:(NSString *)package
syntax:(GPBFileSyntax)syntax;
@end
@interface GPBOneofDescriptor () {
@package
const char *name_;
NSArray *fields_;
SEL caseSel_;
}
// name must be long lived.
- (instancetype)initWithName:(const char *)name fields:(NSArray *)fields;
@end
@interface GPBFieldDescriptor () {
@package
GPBMessageFieldDescription *description_;
GPB_UNSAFE_UNRETAINED GPBOneofDescriptor *containingOneof_;
SEL getSel_;
SEL setSel_;
SEL hasOrCountSel_; // *Count for map<>/repeated fields, has* otherwise.
SEL setHasSel_;
}
// Single initializer
// description has to be long lived, it is held as a raw pointer.
- (instancetype)initWithFieldDescription:(void *)description
includesDefault:(BOOL)includesDefault
syntax:(GPBFileSyntax)syntax;
@end
@interface GPBEnumDescriptor ()
// valueNames, values and extraTextFormatInfo have to be long lived, they are
// held as raw pointers.
+ (instancetype)
allocDescriptorForName:(NSString *)name
valueNames:(const char *)valueNames
values:(const int32_t *)values
count:(uint32_t)valueCount
enumVerifier:(GPBEnumValidationFunc)enumVerifier;
+ (instancetype)
allocDescriptorForName:(NSString *)name
valueNames:(const char *)valueNames
values:(const int32_t *)values
count:(uint32_t)valueCount
enumVerifier:(GPBEnumValidationFunc)enumVerifier
extraTextFormatInfo:(const char *)extraTextFormatInfo;
- (instancetype)initWithName:(NSString *)name
valueNames:(const char *)valueNames
values:(const int32_t *)values
count:(uint32_t)valueCount
enumVerifier:(GPBEnumValidationFunc)enumVerifier;
@end
@interface GPBExtensionDescriptor () {
@package
GPBExtensionDescription *description_;
}
@property(nonatomic, readonly) GPBWireFormat wireType;
// For repeated extensions, alternateWireType is the wireType with the opposite
// value for the packable property. i.e. - if the extension was marked packed
// it would be the wire type for unpacked; if the extension was marked unpacked,
// it would be the wire type for packed.
@property(nonatomic, readonly) GPBWireFormat alternateWireType;
// description has to be long lived, it is held as a raw pointer.
- (instancetype)initWithExtensionDescription:
(GPBExtensionDescription *)description;
- (NSComparisonResult)compareByFieldNumber:(GPBExtensionDescriptor *)other;
@end
CF_EXTERN_C_BEGIN
// Direct access is use for speed, to avoid even internally declaring things
// read/write, etc. The warning is enabled in the project to ensure code calling
// protos can turn on -Wdirect-ivar-access without issues.
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdirect-ivar-access"
GPB_INLINE BOOL GPBFieldIsMapOrArray(GPBFieldDescriptor *field) {
return (field->description_->flags &
(GPBFieldRepeated | GPBFieldMapKeyMask)) != 0;
}
GPB_INLINE GPBDataType GPBGetFieldDataType(GPBFieldDescriptor *field) {
return field->description_->dataType;
}
GPB_INLINE int32_t GPBFieldHasIndex(GPBFieldDescriptor *field) {
return field->description_->hasIndex;
}
GPB_INLINE uint32_t GPBFieldNumber(GPBFieldDescriptor *field) {
return field->description_->number;
}
#pragma clang diagnostic pop
uint32_t GPBFieldTag(GPBFieldDescriptor *self);
// For repeated fields, alternateWireType is the wireType with the opposite
// value for the packable property. i.e. - if the field was marked packed it
// would be the wire type for unpacked; if the field was marked unpacked, it
// would be the wire type for packed.
uint32_t GPBFieldAlternateTag(GPBFieldDescriptor *self);
GPB_INLINE BOOL GPBHasPreservingUnknownEnumSemantics(GPBFileSyntax syntax) {
return syntax == GPBFileSyntaxProto3;
}
GPB_INLINE BOOL GPBExtensionIsRepeated(GPBExtensionDescription *description) {
return (description->options & GPBExtensionRepeated) != 0;
}
GPB_INLINE BOOL GPBExtensionIsPacked(GPBExtensionDescription *description) {
return (description->options & GPBExtensionPacked) != 0;
}
GPB_INLINE BOOL GPBExtensionIsWireFormat(GPBExtensionDescription *description) {
return (description->options & GPBExtensionSetWireFormat) != 0;
}
// Helper for compile time assets.
#ifndef GPBInternalCompileAssert
#if __has_feature(c_static_assert) || __has_extension(c_static_assert)
#define GPBInternalCompileAssert(test, msg) _Static_assert((test), #msg)
#else
// Pre-Xcode 7 support.
#define GPBInternalCompileAssertSymbolInner(line, msg) GPBInternalCompileAssert ## line ## __ ## msg
#define GPBInternalCompileAssertSymbol(line, msg) GPBInternalCompileAssertSymbolInner(line, msg)
#define GPBInternalCompileAssert(test, msg) \
typedef char GPBInternalCompileAssertSymbol(__LINE__, msg) [ ((test) ? 1 : -1) ]
#endif // __has_feature(c_static_assert) || __has_extension(c_static_assert)
#endif // GPBInternalCompileAssert
// Sanity check that there isn't padding between the field description
// structures with and without a default.
GPBInternalCompileAssert(sizeof(GPBMessageFieldDescriptionWithDefault) ==
(sizeof(GPBGenericValue) +
sizeof(GPBMessageFieldDescription)),
DescriptionsWithDefault_different_size_than_expected);
CF_EXTERN_C_END