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GPBDescriptor.m
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GPBDescriptor.m
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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.
#import "GPBDescriptor_PackagePrivate.h"
#import <objc/runtime.h>
#import "GPBMessage_PackagePrivate.h"
#import "GPBUtilities_PackagePrivate.h"
#import "GPBWireFormat.h"
@interface GPBDescriptor ()
- (instancetype)initWithClass:(Class)messageClass
messageName:(NSString *)messageName
fileDescription:(GPBFileDescription *)fileDescription
fields:(NSArray *)fields
storageSize:(uint32_t)storage
wireFormat:(BOOL)wireFormat;
@end
@interface GPBFieldDescriptor ()
// Single initializer
// description has to be long lived, it is held as a raw pointer.
- (instancetype)initWithFieldDescription:(void *)description
descriptorFlags:(GPBDescriptorInitializationFlags)descriptorFlags;
@end
@interface GPBEnumDescriptor ()
- (instancetype)initWithName:(NSString *)name
valueNames:(const char *)valueNames
values:(const int32_t *)values
count:(uint32_t)valueCount
enumVerifier:(GPBEnumValidationFunc)enumVerifier
flags:(GPBEnumDescriptorInitializationFlags)flags;
@end
// 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"
// The addresses of these variables are used as keys for objc_getAssociatedObject.
static const char kTextFormatExtraValueKey = 0;
static const char kParentClassValueKey = 0;
static const char kClassNameSuffixKey = 0;
static const char kFileDescriptorCacheKey = 0;
// Utility function to generate selectors on the fly.
static SEL SelFromStrings(const char *prefix, const char *middle, const char *suffix,
BOOL takesArg) {
if (prefix == NULL && suffix == NULL && !takesArg) {
return sel_getUid(middle);
}
const size_t prefixLen = prefix != NULL ? strlen(prefix) : 0;
const size_t middleLen = strlen(middle);
const size_t suffixLen = suffix != NULL ? strlen(suffix) : 0;
size_t totalLen = prefixLen + middleLen + suffixLen + 1; // include space for null on end.
if (takesArg) {
totalLen += 1;
}
char buffer[totalLen];
if (prefix != NULL) {
memcpy(buffer, prefix, prefixLen);
memcpy(buffer + prefixLen, middle, middleLen);
buffer[prefixLen] = (char)toupper(buffer[prefixLen]);
} else {
memcpy(buffer, middle, middleLen);
}
if (suffix != NULL) {
memcpy(buffer + prefixLen + middleLen, suffix, suffixLen);
}
if (takesArg) {
buffer[totalLen - 2] = ':';
}
// Always null terminate it.
buffer[totalLen - 1] = 0;
SEL result = sel_getUid(buffer);
return result;
}
static NSArray *NewFieldsArrayForHasIndex(int hasIndex, NSArray *allMessageFields)
__attribute__((ns_returns_retained));
static NSArray *NewFieldsArrayForHasIndex(int hasIndex, NSArray *allMessageFields) {
NSMutableArray *result = [[NSMutableArray alloc] init];
for (GPBFieldDescriptor *fieldDesc in allMessageFields) {
if (fieldDesc->description_->hasIndex == hasIndex) {
[result addObject:fieldDesc];
}
}
return result;
}
@implementation GPBDescriptor {
Class messageClass_;
NSString *messageName_;
const GPBFileDescription *fileDescription_;
BOOL wireFormat_;
}
@synthesize messageClass = messageClass_;
@synthesize fields = fields_;
@synthesize oneofs = oneofs_;
@synthesize extensionRanges = extensionRanges_;
@synthesize extensionRangesCount = extensionRangesCount_;
@synthesize wireFormat = wireFormat_;
+ (instancetype)allocDescriptorForClass:(Class)messageClass
messageName:(NSString *)messageName
fileDescription:(GPBFileDescription *)fileDescription
fields:(void *)fieldDescriptions
fieldCount:(uint32_t)fieldCount
storageSize:(uint32_t)storageSize
flags:(GPBDescriptorInitializationFlags)flags {
// Compute the unknown flags by this version of the runtime and then check the passed in flags
// (from the generated code) to detect when sources from a newer version are being used with an
// older runtime.
GPBDescriptorInitializationFlags unknownFlags =
~(GPBDescriptorInitializationFlag_FieldsWithDefault |
GPBDescriptorInitializationFlag_WireFormat | GPBDescriptorInitializationFlag_UsesClassRefs |
GPBDescriptorInitializationFlag_Proto3OptionalKnown |
GPBDescriptorInitializationFlag_ClosedEnumSupportKnown);
if ((flags & unknownFlags) != 0) {
GPBRuntimeMatchFailure();
}
#if defined(DEBUG) && DEBUG
NSAssert((flags & GPBDescriptorInitializationFlag_UsesClassRefs) != 0,
@"Internal error: all fields should have class refs");
NSAssert((flags & GPBDescriptorInitializationFlag_Proto3OptionalKnown) != 0,
@"Internal error: proto3 optional should be known");
NSAssert((flags & GPBDescriptorInitializationFlag_ClosedEnumSupportKnown) != 0,
@"Internal error: close enum should be known");
// `messageName` and `fileDescription` should both be set or both be unset depending on if this is
// being called from current code generation or legacy code generation.
NSAssert((messageName == nil) == (fileDescription == NULL),
@"name and fileDescription should always be provided together");
#endif
NSMutableArray *fields =
(fieldCount ? [[NSMutableArray alloc] initWithCapacity:fieldCount] : nil);
BOOL fieldsIncludeDefault = (flags & GPBDescriptorInitializationFlag_FieldsWithDefault) != 0;
void *desc;
GPBFieldFlags mergedFieldFlags = GPBFieldNone;
for (uint32_t i = 0; i < fieldCount; ++i) {
// Need correctly typed pointer for array indexing below to work.
if (fieldsIncludeDefault) {
desc = &(((GPBMessageFieldDescriptionWithDefault *)fieldDescriptions)[i]);
mergedFieldFlags |=
(((GPBMessageFieldDescriptionWithDefault *)fieldDescriptions)[i]).core.flags;
} else {
desc = &(((GPBMessageFieldDescription *)fieldDescriptions)[i]);
mergedFieldFlags |= (((GPBMessageFieldDescription *)fieldDescriptions)[i]).flags;
}
GPBFieldDescriptor *fieldDescriptor =
[[GPBFieldDescriptor alloc] initWithFieldDescription:desc descriptorFlags:flags];
[fields addObject:fieldDescriptor];
[fieldDescriptor release];
}
// No real value in checking all the fields individually, just check the combined flags at the
// end.
GPBFieldFlags unknownFieldFlags =
~(GPBFieldRequired | GPBFieldRepeated | GPBFieldPacked | GPBFieldOptional |
GPBFieldHasDefaultValue | GPBFieldClearHasIvarOnZero | GPBFieldTextFormatNameCustom |
GPBFieldHasEnumDescriptor | GPBFieldMapKeyMask | GPBFieldClosedEnum);
if ((mergedFieldFlags & unknownFieldFlags) != 0) {
GPBRuntimeMatchFailure();
}
BOOL wireFormat = (flags & GPBDescriptorInitializationFlag_WireFormat) != 0;
GPBDescriptor *descriptor = [[self alloc] initWithClass:messageClass
messageName:messageName
fileDescription:fileDescription
fields:fields
storageSize:storageSize
wireFormat:wireFormat];
[fields release];
return descriptor;
}
+ (instancetype)allocDescriptorForClass:(Class)messageClass
file:(GPBFileDescriptor *)file
fields:(void *)fieldDescriptions
fieldCount:(uint32_t)fieldCount
storageSize:(uint32_t)storageSize
flags:(GPBDescriptorInitializationFlags)flags {
GPBInternalCompileAssert(GOOGLE_PROTOBUF_OBJC_MIN_SUPPORTED_VERSION <= 30006,
time_to_remove_this_old_version_shim);
BOOL fixClassRefs = (flags & GPBDescriptorInitializationFlag_UsesClassRefs) == 0;
GPBInternalCompileAssert(GOOGLE_PROTOBUF_OBJC_MIN_SUPPORTED_VERSION <= 30003,
time_to_remove_non_class_ref_support);
BOOL fixProto3Optional = (flags & GPBDescriptorInitializationFlag_Proto3OptionalKnown) == 0;
GPBInternalCompileAssert(GOOGLE_PROTOBUF_OBJC_MIN_SUPPORTED_VERSION <= 30004,
time_to_remove_proto3_optional_fallback);
BOOL fixClosedEnums = (flags & GPBDescriptorInitializationFlag_ClosedEnumSupportKnown) == 0;
GPBInternalCompileAssert(GOOGLE_PROTOBUF_OBJC_MIN_SUPPORTED_VERSION <= 30005,
time_to_remove_closed_enum_fallback);
if (fixClassRefs || fixProto3Optional || fixClosedEnums) {
BOOL fieldsIncludeDefault = (flags & GPBDescriptorInitializationFlag_FieldsWithDefault) != 0;
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
GPBFileSyntax fileSyntax = file.syntax;
#pragma clang diagnostic pop
for (uint32_t i = 0; i < fieldCount; ++i) {
GPBMessageFieldDescription *coreDesc;
if (fieldsIncludeDefault) {
coreDesc = &((((GPBMessageFieldDescriptionWithDefault *)fieldDescriptions)[i]).core);
} else {
coreDesc = &(((GPBMessageFieldDescription *)fieldDescriptions)[i]);
}
if (fixClassRefs && GPBDataTypeIsMessage(coreDesc->dataType)) {
const char *className = coreDesc->dataTypeSpecific.className;
Class msgClass = objc_getClass(className);
NSAssert(msgClass, @"Class %s not defined", className);
coreDesc->dataTypeSpecific.clazz = msgClass;
}
if (fixProto3Optional) {
// If it was...
// - proto3 syntax
// - not repeated/map
// - not in a oneof (negative has index)
// - not a message (the flag doesn't make sense for messages)
BOOL clearOnZero = ((fileSyntax == GPBFileSyntaxProto3) &&
((coreDesc->flags & (GPBFieldRepeated | GPBFieldMapKeyMask)) == 0) &&
(coreDesc->hasIndex >= 0) && !GPBDataTypeIsMessage(coreDesc->dataType));
if (clearOnZero) {
coreDesc->flags |= GPBFieldClearHasIvarOnZero;
}
}
if (fixClosedEnums) {
// NOTE: This isn't correct, it is using the syntax of the file that
// declared the field, not the syntax of the file that declared the
// enum; but for older generated code, that's all we have and that happens
// to be what the runtime was doing (even though it was wrong). This is
// only wrong in the rare cases an enum is declared in a proto3 syntax
// file but used for a field in the proto2 syntax file.
BOOL isClosedEnum =
(coreDesc->dataType == GPBDataTypeEnum && fileSyntax != GPBFileSyntaxProto3);
if (isClosedEnum) {
coreDesc->flags |= GPBFieldClosedEnum;
}
}
}
flags |= (GPBDescriptorInitializationFlag_UsesClassRefs |
GPBDescriptorInitializationFlag_Proto3OptionalKnown |
GPBDescriptorInitializationFlag_ClosedEnumSupportKnown);
}
GPBDescriptor *result = [self allocDescriptorForClass:messageClass
messageName:nil
fileDescription:NULL
fields:fieldDescriptions
fieldCount:fieldCount
storageSize:storageSize
flags:flags];
objc_setAssociatedObject(result, &kFileDescriptorCacheKey, file,
OBJC_ASSOCIATION_RETAIN_NONATOMIC);
return result;
}
+ (instancetype)allocDescriptorForClass:(Class)messageClass
rootClass:(__unused Class)rootClass
file:(GPBFileDescriptor *)file
fields:(void *)fieldDescriptions
fieldCount:(uint32_t)fieldCount
storageSize:(uint32_t)storageSize
flags:(GPBDescriptorInitializationFlags)flags {
GPBInternalCompileAssert(GOOGLE_PROTOBUF_OBJC_MIN_SUPPORTED_VERSION <= 30006,
time_to_remove_this_old_version_shim);
// The rootClass is no longer used, but it is passed as [ROOT class] to
// ensure it was started up during initialization also when the message
// scopes extensions.
return [self allocDescriptorForClass:messageClass
file:file
fields:fieldDescriptions
fieldCount:fieldCount
storageSize:storageSize
flags:flags];
}
- (instancetype)initWithClass:(Class)messageClass
messageName:(NSString *)messageName
fileDescription:(GPBFileDescription *)fileDescription
fields:(NSArray *)fields
storageSize:(uint32_t)storageSize
wireFormat:(BOOL)wireFormat {
if ((self = [super init])) {
messageClass_ = messageClass;
messageName_ = [messageName copy];
fileDescription_ = fileDescription;
fields_ = [fields retain];
storageSize_ = storageSize;
wireFormat_ = wireFormat;
}
return self;
}
- (void)dealloc {
[messageName_ release];
[fields_ release];
[oneofs_ release];
[super dealloc];
}
// No need to provide -hash/-isEqual: as the instances are singletons and the
// default from NSObject is fine.
- (instancetype)copyWithZone:(__unused NSZone *)zone {
// Immutable.
return [self retain];
}
- (void)setupOneofs:(const char **)oneofNames
count:(uint32_t)count
firstHasIndex:(int32_t)firstHasIndex {
NSCAssert(firstHasIndex < 0, @"Should always be <0");
NSMutableArray *oneofs = [[NSMutableArray alloc] initWithCapacity:count];
for (uint32_t i = 0, hasIndex = firstHasIndex; i < count; ++i, --hasIndex) {
const char *name = oneofNames[i];
NSArray *fieldsForOneof = NewFieldsArrayForHasIndex(hasIndex, fields_);
NSCAssert(fieldsForOneof.count > 0, @"No fields for this oneof? (%s:%d)", name, hasIndex);
GPBOneofDescriptor *oneofDescriptor = [[GPBOneofDescriptor alloc] initWithName:name
fields:fieldsForOneof];
[oneofs addObject:oneofDescriptor];
[oneofDescriptor release];
[fieldsForOneof release];
}
oneofs_ = oneofs;
}
- (void)setupExtraTextInfo:(const char *)extraTextFormatInfo {
// Extra info is a compile time option, so skip the work if not needed.
if (extraTextFormatInfo) {
NSValue *extraInfoValue = [NSValue valueWithPointer:extraTextFormatInfo];
for (GPBFieldDescriptor *fieldDescriptor in fields_) {
if (fieldDescriptor->description_->flags & GPBFieldTextFormatNameCustom) {
objc_setAssociatedObject(fieldDescriptor, &kTextFormatExtraValueKey, extraInfoValue,
OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
}
}
}
- (void)setupExtensionRanges:(const GPBExtensionRange *)ranges count:(int32_t)count {
extensionRanges_ = ranges;
extensionRangesCount_ = count;
}
- (void)setupContainingMessageClass:(Class)messageClass {
objc_setAssociatedObject(self, &kParentClassValueKey, messageClass, OBJC_ASSOCIATION_ASSIGN);
}
- (void)setupContainingMessageClassName:(const char *)msgClassName {
GPBInternalCompileAssert(GOOGLE_PROTOBUF_OBJC_MIN_SUPPORTED_VERSION <= 30003,
time_to_remove_this_old_version_shim);
// Note: Only fetch the class here, can't send messages to it because
// that could cause cycles back to this class within +initialize if
// two messages have each other in fields (i.e. - they build a graph).
Class clazz = objc_getClass(msgClassName);
NSAssert(clazz, @"Class %s not defined", msgClassName);
[self setupContainingMessageClass:clazz];
}
- (void)setupMessageClassNameSuffix:(NSString *)suffix {
GPBInternalCompileAssert(GOOGLE_PROTOBUF_OBJC_MIN_SUPPORTED_VERSION <= 30007,
time_to_remove_this_old_version_shim);
if (suffix.length) {
objc_setAssociatedObject(self, &kClassNameSuffixKey, suffix, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
}
- (NSString *)name {
return NSStringFromClass(messageClass_);
}
- (GPBFileDescriptor *)file {
@synchronized(self) {
GPBFileDescriptor *result = objc_getAssociatedObject(self, &kFileDescriptorCacheKey);
if (!result) {
#if defined(DEBUG) && DEBUG
NSAssert(fileDescription_ != NULL, @"Internal error in generation/startup");
#endif
// `package` and `prefix` can both be NULL if there wasn't one for the file.
NSString *package = fileDescription_->package ? @(fileDescription_->package) : @"";
if (fileDescription_->prefix) {
result = [[GPBFileDescriptor alloc] initWithPackage:package
objcPrefix:@(fileDescription_->prefix)
syntax:fileDescription_->syntax];
} else {
result = [[GPBFileDescriptor alloc] initWithPackage:package
syntax:fileDescription_->syntax];
}
objc_setAssociatedObject(result, &kFileDescriptorCacheKey, result,
OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
return result;
}
}
- (GPBDescriptor *)containingType {
Class parentClass = objc_getAssociatedObject(self, &kParentClassValueKey);
return [parentClass descriptor];
}
- (NSString *)fullName {
GPBDescriptor *parent = self.containingType;
if (messageName_) {
if (parent) {
return [NSString stringWithFormat:@"%@.%@", parent.fullName, messageName_];
}
if (fileDescription_->package) {
return [NSString stringWithFormat:@"%s.%@", fileDescription_->package, messageName_];
}
return messageName_;
}
GPBInternalCompileAssert(GOOGLE_PROTOBUF_OBJC_MIN_SUPPORTED_VERSION <= 30007,
time_to_remove_this_old_approach);
// NOTE: When this code path is removed, this also means this api can't return nil any more but
// that would be a breaking code change (not longer a Swift optional), so changing that will be
// harder.
NSString *className = NSStringFromClass(self.messageClass);
GPBFileDescriptor *file = self.file;
NSString *objcPrefix = file.objcPrefix;
if (objcPrefix && ![className hasPrefix:objcPrefix]) {
NSAssert(0, @"Class didn't have correct prefix? (%@ - %@)", className, objcPrefix);
return nil;
}
NSString *name = nil;
if (parent) {
NSString *parentClassName = NSStringFromClass(parent.messageClass);
// The generator will add _Class to avoid reserved words, drop it.
NSString *suffix = objc_getAssociatedObject(parent, &kClassNameSuffixKey);
if (suffix) {
if (![parentClassName hasSuffix:suffix]) {
NSAssert(0, @"ParentMessage class didn't have correct suffix? (%@ - %@)", className,
suffix);
return nil;
}
parentClassName = [parentClassName substringToIndex:(parentClassName.length - suffix.length)];
}
NSString *parentPrefix = [parentClassName stringByAppendingString:@"_"];
if (![className hasPrefix:parentPrefix]) {
NSAssert(0, @"Class didn't have the correct parent name prefix? (%@ - %@)", parentPrefix,
className);
return nil;
}
name = [className substringFromIndex:parentPrefix.length];
} else {
name = [className substringFromIndex:objcPrefix.length];
}
// The generator will add _Class to avoid reserved words, drop it.
NSString *suffix = objc_getAssociatedObject(self, &kClassNameSuffixKey);
if (suffix) {
if (![name hasSuffix:suffix]) {
NSAssert(0, @"Message class didn't have correct suffix? (%@ - %@)", name, suffix);
return nil;
}
name = [name substringToIndex:(name.length - suffix.length)];
}
NSString *prefix = (parent != nil ? parent.fullName : file.package);
NSString *result;
if (prefix.length > 0) {
result = [NSString stringWithFormat:@"%@.%@", prefix, name];
} else {
result = name;
}
return result;
}
- (GPBFieldDescriptor *)fieldWithNumber:(uint32_t)fieldNumber {
for (GPBFieldDescriptor *descriptor in fields_) {
if (GPBFieldNumber(descriptor) == fieldNumber) {
return descriptor;
}
}
return nil;
}
- (GPBFieldDescriptor *)fieldWithName:(NSString *)name {
for (GPBFieldDescriptor *descriptor in fields_) {
if ([descriptor.name isEqual:name]) {
return descriptor;
}
}
return nil;
}
- (GPBOneofDescriptor *)oneofWithName:(NSString *)name {
for (GPBOneofDescriptor *descriptor in oneofs_) {
if ([descriptor.name isEqual:name]) {
return descriptor;
}
}
return nil;
}
@end
@implementation GPBFileDescriptor {
NSString *package_;
NSString *objcPrefix_;
GPBFileSyntax syntax_;
}
@synthesize package = package_;
@synthesize objcPrefix = objcPrefix_;
@synthesize syntax = syntax_;
- (instancetype)initWithPackage:(NSString *)package
objcPrefix:(NSString *)objcPrefix
syntax:(GPBFileSyntax)syntax {
self = [super init];
if (self) {
package_ = [package copy];
objcPrefix_ = [objcPrefix copy];
syntax_ = syntax;
}
return self;
}
- (instancetype)initWithPackage:(NSString *)package syntax:(GPBFileSyntax)syntax {
self = [super init];
if (self) {
package_ = [package copy];
syntax_ = syntax;
}
return self;
}
- (void)dealloc {
[package_ release];
[objcPrefix_ release];
[super dealloc];
}
- (BOOL)isEqual:(id)other {
if (other == self) {
return YES;
}
if (![other isKindOfClass:[GPBFileDescriptor class]]) {
return NO;
}
GPBFileDescriptor *otherFile = other;
// objcPrefix can be nil, otherwise, straight up compare.
return (syntax_ == otherFile->syntax_ && [package_ isEqual:otherFile->package_] &&
(objcPrefix_ == otherFile->objcPrefix_ ||
(otherFile->objcPrefix_ && [objcPrefix_ isEqual:otherFile->objcPrefix_])));
}
- (NSUInteger)hash {
// The prefix is recommended to be the same for a given package, so just hash
// the package.
return [package_ hash];
}
- (instancetype)copyWithZone:(__unused NSZone *)zone {
// Immutable.
return [self retain];
}
@end
@implementation GPBOneofDescriptor
@synthesize fields = fields_;
- (instancetype)initWithName:(const char *)name fields:(NSArray *)fields {
self = [super init];
if (self) {
name_ = name;
fields_ = [fields retain];
for (GPBFieldDescriptor *fieldDesc in fields) {
fieldDesc->containingOneof_ = self;
}
caseSel_ = SelFromStrings(NULL, name, "OneOfCase", NO);
}
return self;
}
- (void)dealloc {
[fields_ release];
[super dealloc];
}
// No need to provide -hash/-isEqual: as the instances are singletons and the
// default from NSObject is fine.
- (instancetype)copyWithZone:(__unused NSZone *)zone {
// Immutable.
return [self retain];
}
- (NSString *)name {
return (NSString *_Nonnull)@(name_);
}
- (GPBFieldDescriptor *)fieldWithNumber:(uint32_t)fieldNumber {
for (GPBFieldDescriptor *descriptor in fields_) {
if (GPBFieldNumber(descriptor) == fieldNumber) {
return descriptor;
}
}
return nil;
}
- (GPBFieldDescriptor *)fieldWithName:(NSString *)name {
for (GPBFieldDescriptor *descriptor in fields_) {
if ([descriptor.name isEqual:name]) {
return descriptor;
}
}
return nil;
}
@end
uint32_t GPBFieldTag(GPBFieldDescriptor *self) {
GPBMessageFieldDescription *description = self->description_;
GPBWireFormat format;
if ((description->flags & GPBFieldMapKeyMask) != 0) {
// Maps are repeated messages on the wire.
format = GPBWireFormatForType(GPBDataTypeMessage, NO);
} else {
format =
GPBWireFormatForType(description->dataType, ((description->flags & GPBFieldPacked) != 0));
}
return GPBWireFormatMakeTag(description->number, format);
}
uint32_t GPBFieldAlternateTag(GPBFieldDescriptor *self) {
GPBMessageFieldDescription *description = self->description_;
NSCAssert((description->flags & GPBFieldRepeated) != 0, @"Only valid on repeated fields");
GPBWireFormat format =
GPBWireFormatForType(description->dataType, ((description->flags & GPBFieldPacked) == 0));
return GPBWireFormatMakeTag(description->number, format);
}
@implementation GPBFieldDescriptor {
GPBGenericValue defaultValue_;
// Message ivars
Class msgClass_;
// Enum ivars.
GPBEnumDescriptor *enumDescriptor_;
}
@synthesize msgClass = msgClass_;
@synthesize containingOneof = containingOneof_;
- (instancetype)initWithFieldDescription:(void *)description
descriptorFlags:(GPBDescriptorInitializationFlags)descriptorFlags {
if ((self = [super init])) {
BOOL includesDefault =
(descriptorFlags & GPBDescriptorInitializationFlag_FieldsWithDefault) != 0;
GPBMessageFieldDescription *coreDesc;
if (includesDefault) {
coreDesc = &(((GPBMessageFieldDescriptionWithDefault *)description)->core);
} else {
coreDesc = description;
}
description_ = coreDesc;
getSel_ = sel_getUid(coreDesc->name);
setSel_ = SelFromStrings("set", coreDesc->name, NULL, YES);
GPBDataType dataType = coreDesc->dataType;
BOOL isMessage = GPBDataTypeIsMessage(dataType);
BOOL isMapOrArray = GPBFieldIsMapOrArray(self);
if (isMapOrArray) {
// map<>/repeated fields get a *Count property (inplace of a has*) to
// support checking if there are any entries without triggering
// autocreation.
hasOrCountSel_ = SelFromStrings(NULL, coreDesc->name, "_Count", NO);
} else {
// It is a single field; it gets has/setHas selectors if...
// - not in a oneof (negative has index)
// - not clearing on zero
if ((coreDesc->hasIndex >= 0) && ((coreDesc->flags & GPBFieldClearHasIvarOnZero) == 0)) {
hasOrCountSel_ = SelFromStrings("has", coreDesc->name, NULL, NO);
setHasSel_ = SelFromStrings("setHas", coreDesc->name, NULL, YES);
}
}
// Extra type specific data.
if (isMessage) {
// Note: Only fetch the class here, can't send messages to it because
// that could cause cycles back to this class within +initialize if
// two messages have each other in fields (i.e. - they build a graph).
msgClass_ = coreDesc->dataTypeSpecific.clazz;
} else if (dataType == GPBDataTypeEnum) {
enumDescriptor_ = coreDesc->dataTypeSpecific.enumDescFunc();
#if defined(DEBUG) && DEBUG
NSAssert((coreDesc->flags & GPBFieldHasEnumDescriptor) != 0,
@"Field must have GPBFieldHasEnumDescriptor set");
#endif // DEBUG
}
// Non map<>/repeated fields can have defaults in proto2 syntax.
if (!isMapOrArray && includesDefault) {
defaultValue_ = ((GPBMessageFieldDescriptionWithDefault *)description)->defaultValue;
if (dataType == GPBDataTypeBytes) {
// Data stored as a length prefixed (network byte order) c-string in
// descriptor structure.
const uint8_t *bytes = (const uint8_t *)defaultValue_.valueData;
if (bytes) {
uint32_t length;
memcpy(&length, bytes, sizeof(length));
length = ntohl(length);
bytes += sizeof(length);
defaultValue_.valueData = [[NSData alloc] initWithBytes:bytes length:length];
}
}
}
}
return self;
}
- (void)dealloc {
if (description_->dataType == GPBDataTypeBytes && !(description_->flags & GPBFieldRepeated)) {
[defaultValue_.valueData release];
}
[super dealloc];
}
// No need to provide -hash/-isEqual: as the instances are singletons and the
// default from NSObject is fine.
- (instancetype)copyWithZone:(__unused NSZone *)zone {
// Immutable.
return [self retain];
}
- (GPBDataType)dataType {
return description_->dataType;
}
- (BOOL)hasDefaultValue {
return (description_->flags & GPBFieldHasDefaultValue) != 0;
}
- (uint32_t)number {
return description_->number;
}
- (NSString *)name {
return (NSString *_Nonnull)@(description_->name);
}
- (BOOL)isRequired {
return (description_->flags & GPBFieldRequired) != 0;
}
- (BOOL)isOptional {
return (description_->flags & GPBFieldOptional) != 0;
}
- (GPBFieldType)fieldType {
GPBFieldFlags flags = description_->flags;
if ((flags & GPBFieldRepeated) != 0) {
return GPBFieldTypeRepeated;
} else if ((flags & GPBFieldMapKeyMask) != 0) {
return GPBFieldTypeMap;
} else {
return GPBFieldTypeSingle;
}
}
- (GPBDataType)mapKeyDataType {
switch (description_->flags & GPBFieldMapKeyMask) {
case GPBFieldMapKeyInt32:
return GPBDataTypeInt32;
case GPBFieldMapKeyInt64:
return GPBDataTypeInt64;
case GPBFieldMapKeyUInt32:
return GPBDataTypeUInt32;
case GPBFieldMapKeyUInt64:
return GPBDataTypeUInt64;
case GPBFieldMapKeySInt32:
return GPBDataTypeSInt32;
case GPBFieldMapKeySInt64:
return GPBDataTypeSInt64;
case GPBFieldMapKeyFixed32:
return GPBDataTypeFixed32;
case GPBFieldMapKeyFixed64:
return GPBDataTypeFixed64;
case GPBFieldMapKeySFixed32:
return GPBDataTypeSFixed32;
case GPBFieldMapKeySFixed64:
return GPBDataTypeSFixed64;
case GPBFieldMapKeyBool:
return GPBDataTypeBool;
case GPBFieldMapKeyString:
return GPBDataTypeString;
default:
NSAssert(0, @"Not a map type");
return GPBDataTypeInt32; // For lack of anything better.
}
}
- (BOOL)isPackable {
return (description_->flags & GPBFieldPacked) != 0;
}
- (BOOL)isValidEnumValue:(int32_t)value {
NSAssert(description_->dataType == GPBDataTypeEnum, @"Field Must be of type GPBDataTypeEnum");
return enumDescriptor_.enumVerifier(value);
}
- (GPBEnumDescriptor *)enumDescriptor {
return enumDescriptor_;
}
- (GPBGenericValue)defaultValue {
// Depends on the fact that defaultValue_ is initialized either to "0/nil" or
// to an actual defaultValue in our initializer.
GPBGenericValue value = defaultValue_;
if (!(description_->flags & GPBFieldRepeated)) {
// We special handle data and strings. If they are nil, we replace them
// with empty string/empty data.
GPBDataType type = description_->dataType;
if (type == GPBDataTypeBytes && value.valueData == nil) {
value.valueData = GPBEmptyNSData();
} else if (type == GPBDataTypeString && value.valueString == nil) {
value.valueString = @"";
}
}
return value;
}
- (NSString *)textFormatName {
if ((description_->flags & GPBFieldTextFormatNameCustom) != 0) {
NSValue *extraInfoValue = objc_getAssociatedObject(self, &kTextFormatExtraValueKey);
// Support can be left out at generation time.
if (!extraInfoValue) {
return nil;
}
const uint8_t *extraTextFormatInfo = [extraInfoValue pointerValue];
return GPBDecodeTextFormatName(extraTextFormatInfo, GPBFieldNumber(self), self.name);
}
// The logic here has to match SetCommonFieldVariables() from
// objectivec/field.cc in the proto compiler.
NSString *name = self.name;
NSUInteger len = [name length];
// Remove the "_p" added to reserved names.
if ([name hasSuffix:@"_p"]) {
name = [name substringToIndex:(len - 2)];
len = [name length];
}
// Remove "Array" from the end for repeated fields.
if (((description_->flags & GPBFieldRepeated) != 0) && [name hasSuffix:@"Array"]) {
name = [name substringToIndex:(len - 5)];
len = [name length];
}
// Groups vs. other fields.
if (description_->dataType == GPBDataTypeGroup) {
// Just capitalize the first letter.
unichar firstChar = [name characterAtIndex:0];
if (firstChar >= 'a' && firstChar <= 'z') {
NSString *firstCharString =
[NSString stringWithFormat:@"%C", (unichar)(firstChar - 'a' + 'A')];
NSString *result = [name stringByReplacingCharactersInRange:NSMakeRange(0, 1)
withString:firstCharString];
return result;
}
return name;
} else {
// Undo the CamelCase.
NSMutableString *result = [NSMutableString stringWithCapacity:len];
for (uint32_t i = 0; i < len; i++) {
unichar c = [name characterAtIndex:i];
if (c >= 'A' && c <= 'Z') {
if (i > 0) {
[result appendFormat:@"_%C", (unichar)(c - 'A' + 'a')];
} else {
[result appendFormat:@"%C", c];
}
} else {
[result appendFormat:@"%C", c];
}
}
return result;
}
}
@end
@implementation GPBEnumDescriptor {
NSString *name_;
// valueNames_ is a single c string with all of the value names appended
// together, each null terminated. -calcValueNameOffsets fills in
// nameOffsets_ with the offsets to allow quicker access to the individual
// names.
const char *valueNames_;
const int32_t *values_;
GPBEnumValidationFunc enumVerifier_;
const uint8_t *extraTextFormatInfo_;
uint32_t *nameOffsets_;
uint32_t valueCount_;
uint32_t flags_;
}
@synthesize name = name_;
@synthesize enumVerifier = enumVerifier_;
+ (instancetype)allocDescriptorForName:(NSString *)name
valueNames:(const char *)valueNames
values:(const int32_t *)values
count:(uint32_t)valueCount
enumVerifier:(GPBEnumValidationFunc)enumVerifier
flags:(GPBEnumDescriptorInitializationFlags)flags {
// Compute the unknown flags by this version of the runtime and then check the passed in flags
// (from the generated code) to detect when sources from a newer version are being used with an
// older runtime.
GPBEnumDescriptorInitializationFlags unknownFlags =
~(GPBEnumDescriptorInitializationFlag_IsClosed);
if ((flags & unknownFlags) != 0) {
GPBRuntimeMatchFailure();
}
GPBEnumDescriptor *descriptor = [[self alloc] initWithName:name
valueNames:valueNames
values:values
count:valueCount
enumVerifier:enumVerifier
flags:flags];
return descriptor;
}
+ (instancetype)allocDescriptorForName:(NSString *)name
valueNames:(const char *)valueNames
values:(const int32_t *)values
count:(uint32_t)valueCount
enumVerifier:(GPBEnumValidationFunc)enumVerifier
flags:(GPBEnumDescriptorInitializationFlags)flags
extraTextFormatInfo:(const char *)extraTextFormatInfo {
// Call the common case.
GPBEnumDescriptor *descriptor = [self allocDescriptorForName:name
valueNames:valueNames
values:values
count:valueCount
enumVerifier:enumVerifier
flags:flags];
// Set the extra info.
descriptor->extraTextFormatInfo_ = (const uint8_t *)extraTextFormatInfo;
return descriptor;
}
+ (instancetype)allocDescriptorForName:(NSString *)name
valueNames:(const char *)valueNames