// 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 "GPBUtilities_PackagePrivate.h"
#import "GPBWireFormat.h"
#import "GPBMessage_PackagePrivate.h"
// The address of this variable is used as a key for obj_getAssociatedObject.
static const char kTextFormatExtraValueKey = 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_;
GPBFileDescriptor *file_;
BOOL wireFormat_;
}
@synthesize messageClass = messageClass_;
@synthesize fields = fields_;
@synthesize oneofs = oneofs_;
@synthesize extensionRanges = extensionRanges_;
@synthesize extensionRangesCount = extensionRangesCount_;
@synthesize file = file_;
@synthesize wireFormat = wireFormat_;
+ (instancetype)
allocDescriptorForClass:(Class)messageClass
rootClass:(Class)rootClass
file:(GPBFileDescriptor *)file
fields:(void *)fieldDescriptions
fieldCount:(uint32_t)fieldCount
storageSize:(uint32_t)storageSize
flags:(GPBDescriptorInitializationFlags)flags {
// The rootClass is no longer used, but it is passed in to ensure it
// was started up during initialization also.
(void)rootClass;
NSMutableArray *fields = nil;
GPBFileSyntax syntax = file.syntax;
BOOL fieldsIncludeDefault =
(flags & GPBDescriptorInitializationFlag_FieldsWithDefault) != 0;
void *desc;
for (uint32_t i = 0; i < fieldCount; ++i) {
if (fields == nil) {
fields = [[NSMutableArray alloc] initWithCapacity:fieldCount];
}
// Need correctly typed pointer for array indexing below to work.
if (fieldsIncludeDefault) {
GPBMessageFieldDescriptionWithDefault *fieldDescWithDefault = fieldDescriptions;
desc = &(fieldDescWithDefault[i]);
} else {
GPBMessageFieldDescription *fieldDesc = fieldDescriptions;
desc = &(fieldDesc[i]);
}
GPBFieldDescriptor *fieldDescriptor =
[[GPBFieldDescriptor alloc] initWithFieldDescription:desc
includesDefault:fieldsIncludeDefault
syntax:syntax];
[fields addObject:fieldDescriptor];
[fieldDescriptor release];
}
BOOL wireFormat = (flags & GPBDescriptorInitializationFlag_WireFormat) != 0;
GPBDescriptor *descriptor = [[self alloc] initWithClass:messageClass
file:file
fields:fields
storageSize:storageSize
wireFormat:wireFormat];
[fields release];
return descriptor;
}
- (instancetype)initWithClass:(Class)messageClass
file:(GPBFileDescriptor *)file
fields:(NSArray *)fields
storageSize:(uint32_t)storageSize
wireFormat:(BOOL)wireFormat {
if ((self = [super init])) {
messageClass_ = messageClass;
file_ = file;
fields_ = [fields retain];
storageSize_ = storageSize;
wireFormat_ = wireFormat;
}
return self;
}
- (void)dealloc {
[fields_ release];
[oneofs_ release];
[super dealloc];
}
- (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;
}
- (NSString *)name {
return NSStringFromClass(messageClass_);
}
- (id)copyWithZone:(NSZone *)zone {
#pragma unused(zone)
return [self retain];
}
- (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_;
GPBFileSyntax syntax_;
}
@synthesize package = package_;
@synthesize syntax = syntax_;
- (instancetype)initWithPackage:(NSString *)package
syntax:(GPBFileSyntax)syntax {
self = [super init];
if (self) {
package_ = [package copy];
syntax_ = syntax;
}
return self;
}
@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];
}
- (NSString *)name {
return @(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.
// If protos are generated with GenerateEnumDescriptors on then it will
// be a enumDescriptor, otherwise it will be a enumVerifier.
union {
GPBEnumDescriptor *enumDescriptor_;
GPBEnumValidationFunc enumVerifier_;
} enumHandling_;
}
@synthesize msgClass = msgClass_;
@synthesize containingOneof = containingOneof_;
- (instancetype)init {
// Throw an exception if people attempt to not use the designated initializer.
self = [super init];
if (self != nil) {
[self doesNotRecognizeSelector:_cmd];
self = nil;
}
return self;
}
- (instancetype)initWithFieldDescription:(void *)description
includesDefault:(BOOL)includesDefault
syntax:(GPBFileSyntax)syntax {
if ((self = [super init])) {
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 {
// If there is a positive hasIndex, then:
// - All fields types for proto2 messages get has* selectors.
// - Only message fields for proto3 messages get has* selectors.
// Note: the positive check is to handle oneOfs, we can't check
// containingOneof_ because it isn't set until after initialization.
if ((coreDesc->hasIndex >= 0) &&
(coreDesc->hasIndex != GPBNoHasBit) &&
((syntax != GPBFileSyntaxProto3) || isMessage)) {
hasOrCountSel_ = SelFromStrings("has", coreDesc->name, NULL, NO);
setHasSel_ = SelFromStrings("setHas", coreDesc->name, NULL, YES);
}
}
// Extra type specific data.
if (isMessage) {
const char *className = coreDesc->dataTypeSpecific.className;
msgClass_ = objc_getClass(className);
NSAssert(msgClass_, @"Class %s not defined", className);
} else if (dataType == GPBDataTypeEnum) {
if ((coreDesc->flags & GPBFieldHasEnumDescriptor) != 0) {
enumHandling_.enumDescriptor_ =
coreDesc->dataTypeSpecific.enumDescFunc();
} else {
enumHandling_.enumVerifier_ =
coreDesc->dataTypeSpecific.enumVerifier;
}
}
// 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 = *((uint32_t *)bytes);
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];
}
- (GPBDataType)dataType {
return description_->dataType;
}
- (BOOL)hasDefaultValue {
return (description_->flags & GPBFieldHasDefaultValue) != 0;
}
- (uint32_t)number {
return description_->number;
}
- (NSString *)name {
return @(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");
if (description_->flags & GPBFieldHasEnumDescriptor) {
return enumHandling_.enumDescriptor_.enumVerifier(value);
} else {
return enumHandling_.enumVerifier_(value);
}
}
- (GPBEnumDescriptor *)enumDescriptor {
if (description_->flags & GPBFieldHasEnumDescriptor) {
return enumHandling_.enumDescriptor_;
} else {
return nil;
}
}
- (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_;
}
@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 {
GPBEnumDescriptor *descriptor = [[self alloc] initWithName:name
valueNames:valueNames
values:values
count:valueCount
enumVerifier:enumVerifier];
return descriptor;
}
+ (instancetype)
allocDescriptorForName:(NSString *)name
valueNames:(const char *)valueNames
values:(const int32_t *)values
count:(uint32_t)valueCount
enumVerifier:(GPBEnumValidationFunc)enumVerifier
extraTextFormatInfo:(const char *)extraTextFormatInfo {
// Call the common case.
GPBEnumDescriptor *descriptor = [self allocDescriptorForName:name
valueNames:valueNames
values:values
count:valueCount
enumVerifier:enumVerifier];
// 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 {
if ((self = [super init])) {
name_ = [name copy];
valueNames_ = valueNames;
values_ = values;
valueCount_ = valueCount;
enumVerifier_ = enumVerifier;
}
return self;
}
- (void)dealloc {
[name_ release];
if (nameOffsets_) free(nameOffsets_);
[super dealloc];
}
- (void)calcValueNameOffsets {
@synchronized(self) {
if (nameOffsets_ != NULL) {
return;
}
uint32_t *offsets = malloc(valueCount_ * sizeof(uint32_t));
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 {
if (nameOffsets_ == NULL) [self calcValueNameOffsets];
for (uint32_t i = 0; i < valueCount_; ++i) {
if (values_[i] == number) {
const char *valueName = valueNames_ + nameOffsets_[i];
NSString *fullName = [NSString stringWithFormat:@"%@_%s", name_, valueName];
return fullName;
}
}
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;
if (nameOffsets_ == NULL) [self calcValueNameOffsets];
// 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;
}
- (NSString *)textFormatNameForValue:(int32_t)number {
if (nameOffsets_ == NULL) [self calcValueNameOffsets];
// 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;
}
NSString *result = nil;
// Naming adds an underscore between enum name and value name, skip that also.
const char *valueName = valueNames_ + nameOffsets_[valueDescriptorIndex];
NSString *shortName = @(valueName);
// See if it is in the map of special format handling.
if (extraTextFormatInfo_) {
result = GPBDecodeTextFormatName(extraTextFormatInfo_,
(int32_t)valueDescriptorIndex, 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_;
}
@synthesize containingMessageClass = containingMessageClass_;
- (instancetype)initWithExtensionDescription:
(GPBExtensionDescription *)description {
if ((self = [super init])) {
description_ = description;
#if DEBUG
const char *className = description->messageOrGroupClassName;
if (className) {
NSAssert(objc_lookUpClass(className) != Nil,
@"Class %s not defined", className);
}
#endif
if (description->extendedClass) {
Class containingClass = objc_lookUpClass(description->extendedClass);
NSAssert(containingClass, @"Class %s not defined",
description->extendedClass);
containingMessageClass_ = containingClass;
}
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 = *((uint32_t *)bytes);
// 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 avoid initialization
// order issues.
} else {
defaultValue_ = description->defaultValue;
}
}
return self;
}
- (void)dealloc {
if ((description_->dataType == GPBDataTypeBytes) &&
!GPBExtensionIsRepeated(description_)) {
[defaultValue_.valueData release];
}
[super dealloc];
}
- (instancetype)copyWithZone:(NSZone *)zone {
#pragma unused(zone)
// Immutable.
return [self retain];
}
- (NSString *)singletonName {
return @(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)isMap {
return (description_->options & GPBFieldMapKeyMask) != 0;
}
- (BOOL)isPackable {
return GPBExtensionIsPacked(description_);
}
- (Class)msgClass {
return objc_getClass(description_->messageOrGroupClassName);
}
- (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