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- /*
- * Copyright (c) 2009-2015 Erik Doernenburg and contributors
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may
- * not use these files except in compliance with the License. You may obtain
- * a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations
- * under the License.
- */
- #import "NSMethodSignature+OCMAdditions.h"
- #import "OCMFunctions.h"
- #import <objc/runtime.h>
- @implementation NSMethodSignature(OCMAdditions)
- - (BOOL)usesSpecialStructureReturn
- {
- const char *types = OCMTypeWithoutQualifiers([self methodReturnType]);
- if((types == NULL) || (types[0] != '{'))
- return NO;
- /* In some cases structures are returned by ref. The rules are complex and depend on the
- architecture, see:
- http://sealiesoftware.com/blog/archive/2008/10/30/objc_explain_objc_msgSend_stret.html
- http://developer.apple.com/library/mac/#documentation/DeveloperTools/Conceptual/LowLevelABI/000-Introduction/introduction.html
- https://github.com/atgreen/libffi/blob/master/src/x86/ffi64.c
- http://www.uclibc.org/docs/psABI-x86_64.pdf
- http://infocenter.arm.com/help/topic/com.arm.doc.ihi0042e/IHI0042E_aapcs.pdf
- NSMethodSignature knows the details but has no API to return it, though it is in
- the debugDescription. Horribly kludgy.
- */
- NSRange range = [[self debugDescription] rangeOfString:@"is special struct return? YES"];
- return range.length > 0;
- }
- - (NSString *)fullTypeString
- {
- NSMutableString *typeString = [NSMutableString string];
- [typeString appendFormat:@"%s", [self methodReturnType]];
- for (NSUInteger i=0; i<[self numberOfArguments]; i++)
- [typeString appendFormat:@"%s", [self getArgumentTypeAtIndex:i]];
- return typeString;
- }
- - (const char *)fullObjCTypes
- {
- return [[self fullTypeString] UTF8String];
- }
- @end
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