Protocol Buffers - Google's data interchange format (grpc依赖) https://developers.google.com/protocol-buffers/
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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd
#import "GPBDescriptor.h"
#import "GPBDescriptor_PackagePrivate.h"
#import <objc/runtime.h>
#import "GPBMessage.h"
#import "GPBMessage_PackagePrivate.h"
#import "GPBUtilities.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 kFileDescriptorCacheKey = 0;
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");
NSAssert((messageName != nil), @"Internal error: missing messageName");
NSAssert((fileDescription != NULL), @"Internal error: missing fileDescription");
#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)initWithClass:(Class)messageClass
messageName:(NSString *)messageName
fileDescription:(GPBFileDescription *)fileDescription
fields:(NSArray *)fields
storageSize:(uint32_t)storageSize
wireFormat:(BOOL)wireFormat {
#if defined(DEBUG) && DEBUG && !defined(NS_BLOCK_ASSERTIONS)
// This is also checked by the generator.
NSAssert(!wireFormat || fields.count == 0, @"Internal error: MessageSets should not have fields");
#endif
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);
}
- (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_;
}
#if defined(DEBUG) && DEBUG
NSAssert(NO, @"Missing messageName_");
#endif
return nil;
}
- (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_;
- (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;
}
}
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;
GPBDataType dataType = coreDesc->dataType;
BOOL isMessage = GPBDataTypeIsMessage(dataType);
// 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.
BOOL isMapOrArray = GPBFieldIsMapOrArray(self);
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)initWithName:(NSString *)name
valueNames:(const char *)valueNames
values:(const int32_t *)values
count:(uint32_t)valueCount
enumVerifier:(GPBEnumValidationFunc)enumVerifier
flags:(GPBEnumDescriptorInitializationFlags)flags {
if ((self = [super init])) {
name_ = [name copy];
valueNames_ = valueNames;
values_ = values;
valueCount_ = valueCount;
enumVerifier_ = enumVerifier;
flags_ = flags;
}
return self;
}
- (void)dealloc {
[name_ release];
if (nameOffsets_) free(nameOffsets_);
[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];
}
- (BOOL)isClosed {
return (flags_ & GPBEnumDescriptorInitializationFlag_IsClosed) != 0;
}
- (void)calcValueNameOffsets {
@synchronized(self) {
if (nameOffsets_ != NULL) {
return;
}
uint32_t *offsets = malloc(valueCount_ * sizeof(uint32_t));
if (!offsets) return;
const char *scan = valueNames_;
for (uint32_t i = 0; i < valueCount_; ++i) {
offsets[i] = (uint32_t)(scan - valueNames_);
while (*scan != '\0') ++scan;
++scan; // Step over the null.
}
nameOffsets_ = offsets;
}
}
- (NSString *)enumNameForValue:(int32_t)number {
for (uint32_t i = 0; i < valueCount_; ++i) {
if (values_[i] == number) {
return [self getEnumNameForIndex:i];
}
}
return nil;
}
- (BOOL)getValue:(int32_t *)outValue forEnumName:(NSString *)name {
// Must have the prefix.
NSUInteger prefixLen = name_.length + 1;
if ((name.length <= prefixLen) || ![name hasPrefix:name_] ||
([name characterAtIndex:prefixLen - 1] != '_')) {
return NO;
}
// Skip over the prefix.
const char *nameAsCStr = [name UTF8String];
nameAsCStr += prefixLen;
[self calcValueNameOffsets];
if (nameOffsets_ == NULL) return NO;
// Find it.
for (uint32_t i = 0; i < valueCount_; ++i) {
const char *valueName = valueNames_ + nameOffsets_[i];
if (strcmp(nameAsCStr, valueName) == 0) {
if (outValue) {
*outValue = values_[i];
}
return YES;
}
}
return NO;
}
- (BOOL)getValue:(int32_t *)outValue forEnumTextFormatName:(NSString *)textFormatName {
[self calcValueNameOffsets];
if (nameOffsets_ == NULL) return NO;
for (uint32_t i = 0; i < valueCount_; ++i) {
NSString *valueTextFormatName = [self getEnumTextFormatNameForIndex:i];
if ([valueTextFormatName isEqual:textFormatName]) {
if (outValue) {
*outValue = values_[i];
}
return YES;
}
}
return NO;
}
- (NSString *)textFormatNameForValue:(int32_t)number {
// Find the EnumValue descriptor and its index.
BOOL foundIt = NO;
uint32_t valueDescriptorIndex;
for (valueDescriptorIndex = 0; valueDescriptorIndex < valueCount_; ++valueDescriptorIndex) {
if (values_[valueDescriptorIndex] == number) {
foundIt = YES;
break;
}
}
if (!foundIt) {
return nil;
}
return [self getEnumTextFormatNameForIndex:valueDescriptorIndex];
}
- (uint32_t)enumNameCount {
return valueCount_;
}
- (NSString *)getEnumNameForIndex:(uint32_t)index {
[self calcValueNameOffsets];
if (nameOffsets_ == NULL) return nil;
if (index >= valueCount_) {
return nil;
}
const char *valueName = valueNames_ + nameOffsets_[index];
NSString *fullName = [NSString stringWithFormat:@"%@_%s", name_, valueName];
return fullName;
}
- (NSString *)getEnumTextFormatNameForIndex:(uint32_t)index {
[self calcValueNameOffsets];
if (nameOffsets_ == NULL) return nil;
if (index >= valueCount_) {
return nil;
}
NSString *result = nil;
// Naming adds an underscore between enum name and value name, skip that also.
const char *valueName = valueNames_ + nameOffsets_[index];
NSString *shortName = @(valueName);
// See if it is in the map of special format handling.
if (extraTextFormatInfo_) {
result = GPBDecodeTextFormatName(extraTextFormatInfo_, (int32_t)index, shortName);
}
// Logic here needs to match what objectivec/enum.cc does in the proto
// compiler.
if (result == nil) {
NSUInteger len = [shortName length];
NSMutableString *worker = [NSMutableString stringWithCapacity:len];
for (NSUInteger i = 0; i < len; i++) {
unichar c = [shortName characterAtIndex:i];
if (i > 0 && c >= 'A' && c <= 'Z') {
[worker appendString:@"_"];
}
[worker appendFormat:@"%c", toupper((char)c)];
}
result = worker;
}
return result;
}
@end
@implementation GPBExtensionDescriptor {
GPBGenericValue defaultValue_;
}
- (instancetype)initWithExtensionDescription:(GPBExtensionDescription *)desc
usesClassRefs:(BOOL)usesClassRefs {
// Compute the unknown options by this version of the runtime and then check the passed in
// descriptor's options (from the generated code) to detect when sources from a newer version are
// being used with an older runtime.
GPBExtensionOptions unknownOptions =
~(GPBExtensionRepeated | GPBExtensionPacked | GPBExtensionSetWireFormat);
if ((desc->options & unknownOptions) != 0) {
GPBRuntimeMatchFailure();
}
#if defined(DEBUG) && DEBUG && !defined(NS_BLOCK_ASSERTIONS)
NSAssert(usesClassRefs, @"Internal error: all extensions should have class refs");
// These are also checked by the generator.
if ((desc->options & GPBExtensionSetWireFormat) != 0) {
NSAssert(desc->dataType == GPBDataTypeMessage,
@"Internal error: If a MessageSet extension is set, the data type must be a message.");
NSAssert((desc->options & GPBExtensionRepeated) == 0,
@"Internal Error: MessageSet extension can't be repeated.");
// NOTE: Could also check that the extended class is a MessageSet, but that would force the
// ObjC runtime to start up that class and that isn't desirable here.
}
#endif
if ((self = [super init])) {
description_ = desc;
GPBDataType type = description_->dataType;
if (type == GPBDataTypeBytes) {
// Data stored as a length prefixed c-string in descriptor records.
const uint8_t *bytes = (const uint8_t *)description_->defaultValue.valueData;
if (bytes) {
uint32_t length;
memcpy(&length, bytes, sizeof(length));
// The length is stored in network byte order.
length = ntohl(length);
bytes += sizeof(length);
defaultValue_.valueData = [[NSData alloc] initWithBytes:bytes length:length];
}
} else if (type == GPBDataTypeMessage || type == GPBDataTypeGroup) {
// The default is looked up in -defaultValue instead since extensions
// aren't common, we avoid the hit startup hit and it avoids initialization
// order issues.
} else {
defaultValue_ = description_->defaultValue;
}
}
return self;
}
- (void)dealloc {
if ((description_->dataType == GPBDataTypeBytes) && !GPBExtensionIsRepeated(description_)) {
[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];
}
- (NSString *)singletonName {
return (NSString *_Nonnull)@(description_->singletonName);
}
- (const char *)singletonNameC {
return description_->singletonName;
}
- (uint32_t)fieldNumber {
return description_->fieldNumber;
}
- (GPBDataType)dataType {
return description_->dataType;
}
- (GPBWireFormat)wireType {
return GPBWireFormatForType(description_->dataType, GPBExtensionIsPacked(description_));
}
- (GPBWireFormat)alternateWireType {
NSAssert(GPBExtensionIsRepeated(description_), @"Only valid on repeated extensions");
return GPBWireFormatForType(description_->dataType, !GPBExtensionIsPacked(description_));
}
- (BOOL)isRepeated {
return GPBExtensionIsRepeated(description_);
}
- (BOOL)isPackable {
return GPBExtensionIsPacked(description_);
}
- (Class)msgClass {
return description_->messageOrGroupClass.clazz;
}
- (Class)containingMessageClass {
return description_->extendedClass.clazz;
}
- (GPBEnumDescriptor *)enumDescriptor {
if (description_->dataType == GPBDataTypeEnum) {
GPBEnumDescriptor *enumDescriptor = description_->enumDescriptorFunc();
return enumDescriptor;
}
return nil;
}
- (id)defaultValue {
if (GPBExtensionIsRepeated(description_)) {
return nil;
}
switch (description_->dataType) {
case GPBDataTypeBool:
return @(defaultValue_.valueBool);
case GPBDataTypeFloat:
return @(defaultValue_.valueFloat);
case GPBDataTypeDouble:
return @(defaultValue_.valueDouble);
case GPBDataTypeInt32:
case GPBDataTypeSInt32:
case GPBDataTypeEnum:
case GPBDataTypeSFixed32:
return @(defaultValue_.valueInt32);
case GPBDataTypeInt64:
case GPBDataTypeSInt64:
case GPBDataTypeSFixed64:
return @(defaultValue_.valueInt64);
case GPBDataTypeUInt32:
case GPBDataTypeFixed32:
return @(defaultValue_.valueUInt32);
case GPBDataTypeUInt64:
case GPBDataTypeFixed64:
return @(defaultValue_.valueUInt64);
case GPBDataTypeBytes:
// Like message fields, the default is zero length data.
return (defaultValue_.valueData ? defaultValue_.valueData : GPBEmptyNSData());
case GPBDataTypeString:
// Like message fields, the default is zero length string.
return (defaultValue_.valueString ? defaultValue_.valueString : @"");
case GPBDataTypeGroup:
case GPBDataTypeMessage:
return nil;
}
}
- (NSComparisonResult)compareByFieldNumber:(GPBExtensionDescriptor *)other {
int32_t selfNumber = description_->fieldNumber;
int32_t otherNumber = other->description_->fieldNumber;
if (selfNumber < otherNumber) {
return NSOrderedAscending;
} else if (selfNumber == otherNumber) {
return NSOrderedSame;
} else {
return NSOrderedDescending;
}
}
@end
#pragma clang diagnostic pop