Add CFPropertyToLaunchData() and its test

util/mac/launchd.mm

+// Copyright 2014 The Crashpad Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file 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.
+
+#include "util/mac/launchd.h"
+
+#import <Foundation/Foundation.h>
+
+#include "base/mac/foundation_util.h"
+#include "base/mac/scoped_launch_data.h"
+#include "base/mac/scoped_cftyperef.h"
+#include "base/strings/sys_string_conversions.h"
+
+namespace crashpad {
+
+launch_data_t CFPropertyToLaunchData(CFPropertyListRef property_cf) {
+  // This function mixes Foundation and Core Foundation access to property list
+  // elements according to which is more convenient and correct for any specific
+  // task.
+
+  launch_data_t data_launch = NULL;
+  CFTypeID type_id_cf = CFGetTypeID(property_cf);
+
+  if (type_id_cf == CFDictionaryGetTypeID()) {
+    NSDictionary* dictionary_ns = base::mac::CFToNSCast(
+        base::mac::CFCastStrict<CFDictionaryRef>(property_cf));
+    base::mac::ScopedLaunchData dictionary_launch(
+        launch_data_alloc(LAUNCH_DATA_DICTIONARY));
+
+    for (NSString* key in dictionary_ns) {
+      if (![key isKindOfClass:[NSString class]]) {
+        return NULL;
+      }
+
+      CFPropertyListRef value_cf =
+          static_cast<CFPropertyListRef>([dictionary_ns objectForKey:key]);
+      launch_data_t value_launch = CFPropertyToLaunchData(value_cf);
+      if (!value_launch) {
+        return NULL;
+      }
+
+      launch_data_dict_insert(
+          dictionary_launch, value_launch, [key UTF8String]);
+    }
+
+    data_launch = dictionary_launch.release();
+
+  } else if (type_id_cf == CFArrayGetTypeID()) {
+    NSArray* array_ns =
+        base::mac::CFToNSCast(base::mac::CFCastStrict<CFArrayRef>(property_cf));
+    base::mac::ScopedLaunchData array_launch(
+        launch_data_alloc(LAUNCH_DATA_ARRAY));
+    size_t index = 0;
+
+    for (id element_ns in array_ns) {
+      CFPropertyListRef element_cf = static_cast<CFPropertyListRef>(element_ns);
+      launch_data_t element_launch = CFPropertyToLaunchData(element_cf);
+      if (!element_launch) {
+        return NULL;
+      }
+
+      launch_data_array_set_index(array_launch, element_launch, index++);
+    }
+
+    data_launch = array_launch.release();
+
+  } else if (type_id_cf == CFNumberGetTypeID()) {
+    CFNumberRef number_cf = base::mac::CFCastStrict<CFNumberRef>(property_cf);
+    NSNumber* number_ns = base::mac::CFToNSCast(number_cf);
+    switch (CFNumberGetType(number_cf)) {
+      case kCFNumberSInt8Type:
+      case kCFNumberSInt16Type:
+      case kCFNumberSInt32Type:
+      case kCFNumberSInt64Type:
+      case kCFNumberCharType:
+      case kCFNumberShortType:
+      case kCFNumberIntType:
+      case kCFNumberLongType:
+      case kCFNumberLongLongType:
+      case kCFNumberCFIndexType:
+      case kCFNumberNSIntegerType: {
+        data_launch = launch_data_new_integer([number_ns longLongValue]);
+        break;
+      }
+
+      case kCFNumberFloat32Type:
+      case kCFNumberFloat64Type:
+      case kCFNumberFloatType:
+      case kCFNumberDoubleType: {
+        data_launch = launch_data_new_real([number_ns doubleValue]);
+        break;
+      }
+
+      default: { return NULL; }
+    }
+
+  } else if (type_id_cf == CFBooleanGetTypeID()) {
+    CFBooleanRef boolean_cf =
+        base::mac::CFCastStrict<CFBooleanRef>(property_cf);
+    data_launch = launch_data_new_bool(CFBooleanGetValue(boolean_cf));
+
+  } else if (type_id_cf == CFStringGetTypeID()) {
+    NSString* string_ns = base::mac::CFToNSCast(
+        base::mac::CFCastStrict<CFStringRef>(property_cf));
+
+    // -fileSystemRepresentation might be more correct than -UTF8String, because
+    // these strings can hold paths. The analogous function in launchctl,
+    // CF2launch_data (10.9.2 launchd-842.90.1/support/launchctl.c), uses UTF-8
+    // instead of filesystem encoding, so do the same here. Note that there’s
+    // another occurrence of -UTF8String above, used for dictionary keys.
+    data_launch = launch_data_new_string([string_ns UTF8String]);
+
+  } else if (type_id_cf == CFDataGetTypeID()) {
+    NSData* data_ns =
+        base::mac::CFToNSCast(base::mac::CFCastStrict<CFDataRef>(property_cf));
+    data_launch = launch_data_new_opaque([data_ns bytes], [data_ns length]);
+  } else {
+    base::ScopedCFTypeRef<CFStringRef> type_name_cf(
+        CFCopyTypeIDDescription(type_id_cf));
+    DLOG(ERROR) << "unable to convert CFTypeID " << type_id_cf << " ("
+                << base::SysCFStringRefToUTF8(type_name_cf) << ")";
+  }
+
+  return data_launch;
+}
+
+}  // namespace crashpad