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WebDriverAgentLib/Utilities/FBRuntimeUtils.m

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+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import "FBRuntimeUtils.h"
+
+#import "FBMacros.h"
+#import "XCUIDevice.h"
+
+#include <dlfcn.h>
+#import <objc/runtime.h>
+
+NSArray<Class> *FBClassesThatConformsToProtocol(Protocol *protocol)
+{
+  Class *classes = NULL;
+  NSMutableArray *collection = [NSMutableArray array];
+  int numClasses = objc_getClassList(NULL, 0);
+  if (numClasses == 0 ) {
+    return @[];
+  }
+
+  classes = (__unsafe_unretained Class*)malloc(sizeof(Class) * numClasses);
+  numClasses = objc_getClassList(classes, numClasses);
+  for (int index = 0; index < numClasses; index++) {
+    Class aClass = classes[index];
+    if (class_conformsToProtocol(aClass, protocol)) {
+      [collection addObject:aClass];
+    }
+  }
+  free(classes);
+  return collection.copy;
+}
+
+void *FBRetrieveSymbolFromBinary(const char *binary, const char *name)
+{
+  void *handle = dlopen(binary, RTLD_LAZY);
+  NSCAssert(handle, @"%s could not be opened", binary);
+  void *pointer = dlsym(handle, name);
+  NSCAssert(pointer, @"%s could not be located", name);
+  return pointer;
+}
+
+static NSString *sdkVersion = nil;
+static dispatch_once_t onceSdkVersionToken;
+NSString * _Nullable FBSDKVersion(void)
+{
+  dispatch_once(&onceSdkVersionToken, ^{
+    NSString *sdkName = [[NSBundle mainBundle] infoDictionary][@"DTSDKName"];
+    if (sdkName) {
+      // the value of DTSDKName looks like 'iphoneos9.2'
+      NSRange versionRange = [sdkName rangeOfString:@"\\d+\\.\\d+" options:NSRegularExpressionSearch];
+      if (versionRange.location != NSNotFound) {
+        sdkVersion = [sdkName substringWithRange:versionRange];
+      }
+    }
+  });
+  return sdkVersion;
+}
+
+BOOL isSDKVersionLessThan(NSString *expected)
+{
+  NSString *version = FBSDKVersion();
+  if (nil == version) {
+    return SYSTEM_VERSION_LESS_THAN(expected);
+  }
+  NSComparisonResult result = [version compare:expected options:NSNumericSearch];
+  return result == NSOrderedAscending;
+}
+
+BOOL isSDKVersionLessThanOrEqualTo(NSString *expected)
+{
+  NSString *version = FBSDKVersion();
+  if (nil == version) {
+    return SYSTEM_VERSION_LESS_THAN_OR_EQUAL_TO(expected);
+  }
+  NSComparisonResult result = [version compare:expected options:NSNumericSearch];
+  return result == NSOrderedAscending || result == NSOrderedSame;
+}
+
+BOOL isSDKVersionEqualTo(NSString *expected)
+{
+  NSString *version = FBSDKVersion();
+  if (nil == version) {
+    return SYSTEM_VERSION_EQUAL_TO(expected);
+  }
+  NSComparisonResult result = [version compare:expected options:NSNumericSearch];
+  return result == NSOrderedSame;
+}
+
+BOOL isSDKVersionGreaterThanOrEqualTo(NSString *expected)
+{
+  NSString *version = FBSDKVersion();
+  if (nil == version) {
+    return SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(expected);
+  }
+  NSComparisonResult result = [version compare:expected options:NSNumericSearch];
+  return result == NSOrderedDescending || result == NSOrderedSame;
+}
+
+BOOL isSDKVersionGreaterThan(NSString *expected)
+{
+  NSString *version = FBSDKVersion();
+  if (nil == version) {
+    return SYSTEM_VERSION_GREATER_THAN(expected);
+  }
+  NSComparisonResult result = [version compare:expected options:NSNumericSearch];
+  return result == NSOrderedDescending;
+}