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| 805 | - | 1 | // |
| 2 | // Copyright 2009-2010 Facebook |
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| 3 | // |
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| 4 | // Licensed under the Apache License, Version 2.0 (the "License"); |
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| 5 | // you may not use this file except in compliance with the License. |
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| 6 | // You may obtain a copy of the License at |
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| 7 | // |
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| 8 | // http://www.apache.org/licenses/LICENSE-2.0 |
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| 9 | // |
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| 10 | // Unless required by applicable law or agreed to in writing, software |
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| 11 | // distributed under the License is distributed on an "AS IS" BASIS, |
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| 12 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 13 | // See the License for the specific language governing permissions and |
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| 14 | // limitations under the License. |
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| 15 | // |
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| 16 | |||
| 17 | #import "TTGlobalCore.h" |
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| 18 | |||
| 19 | #import <objc/runtime.h> |
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| 20 | |||
| 21 | // No-ops for non-retaining objects. |
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| 22 | static const void* TTRetainNoOp(CFAllocatorRef allocator, const void *value) { return value; } |
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| 23 | static void TTReleaseNoOp(CFAllocatorRef allocator, const void *value) { } |
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| 24 | |||
| 25 | |||
| 26 | /////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 27 | NSMutableArray* TTCreateNonRetainingArray() { |
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| 28 | CFArrayCallBacks callbacks = kCFTypeArrayCallBacks; |
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| 29 | callbacks.retain = TTRetainNoOp; |
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| 30 | callbacks.release = TTReleaseNoOp; |
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| 31 | return (NSMutableArray*)CFArrayCreateMutable(nil, 0, &callbacks); |
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| 32 | } |
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| 33 | |||
| 34 | |||
| 35 | /////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 36 | NSMutableDictionary* TTCreateNonRetainingDictionary() { |
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| 37 | CFDictionaryKeyCallBacks keyCallbacks = kCFTypeDictionaryKeyCallBacks; |
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| 38 | CFDictionaryValueCallBacks callbacks = kCFTypeDictionaryValueCallBacks; |
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| 39 | callbacks.retain = TTRetainNoOp; |
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| 40 | callbacks.release = TTReleaseNoOp; |
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| 41 | return (NSMutableDictionary*)CFDictionaryCreateMutable(nil, 0, &keyCallbacks, &callbacks); |
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| 42 | } |
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| 43 | |||
| 44 | |||
| 45 | /////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 46 | BOOL TTIsArrayWithItems(id object) { |
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| 47 | return [object isKindOfClass:[NSArray class]] && [(NSArray*)object count] > 0; |
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| 48 | } |
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| 49 | |||
| 50 | |||
| 51 | /////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 52 | BOOL TTIsSetWithItems(id object) { |
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| 53 | return [object isKindOfClass:[NSSet class]] && [(NSSet*)object count] > 0; |
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| 54 | } |
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| 55 | |||
| 56 | |||
| 57 | /////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 58 | BOOL TTIsStringWithAnyText(id object) { |
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| 59 | return [object isKindOfClass:[NSString class]] && [(NSString*)object length] > 0; |
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| 60 | } |
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| 61 | |||
| 62 | |||
| 63 | /////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 64 | void TTSwapMethods(Class cls, SEL originalSel, SEL newSel) { |
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| 65 | Method originalMethod = class_getInstanceMethod(cls, originalSel); |
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| 66 | Method newMethod = class_getInstanceMethod(cls, newSel); |
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| 67 | method_exchangeImplementations(originalMethod, newMethod); |
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| 68 | } |