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77e2d28919
* Create transfer-array method and use it * License headers * Update ASArrayByFlatMapping
53 lines
1.7 KiB
Objective-C
53 lines
1.7 KiB
Objective-C
//
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// ASExperimentalFeatures.m
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// Texture
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//
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// Copyright (c) 2018-present, Pinterest, Inc. All rights reserved.
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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#import <AsyncDisplayKit/ASExperimentalFeatures.h>
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#import <AsyncDisplayKit/ASCollections.h>
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NSArray<NSString *> *ASExperimentalFeaturesGetNames(ASExperimentalFeatures flags)
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{
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NSArray *allNames = ASCreateOnce((@[@"exp_graphics_contexts",
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@"exp_text_node",
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@"exp_interface_state_coalesce",
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@"exp_unfair_lock",
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@"exp_infer_layer_defaults",
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@"exp_network_image_queue",
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@"exp_dealloc_queue_v2",
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@"exp_collection_teardown"]));
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if (flags == ASExperimentalFeatureAll) {
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return allNames;
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}
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// Go through all names, testing each bit.
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NSUInteger i = 0;
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return ASArrayByFlatMapping(allNames, NSString *name, ({
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(flags & (1 << i++)) ? name : nil;
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}));
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}
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// O(N^2) but with counts this small, it's probably faster
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// than hashing the strings.
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ASExperimentalFeatures ASExperimentalFeaturesFromArray(NSArray<NSString *> *array)
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{
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NSArray *allNames = ASExperimentalFeaturesGetNames(ASExperimentalFeatureAll);
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ASExperimentalFeatures result = 0;
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for (NSString *str in array) {
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NSUInteger i = [allNames indexOfObject:str];
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if (i != NSNotFound) {
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result |= (1 << i);
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}
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}
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return result;
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}
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