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/*
* Copyright 2020, Google LLC
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* Neither the name of Google LLC nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.android.tools.smali.dexlib2;
import static java.util.Collections.unmodifiableSet;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.StringJoiner;
public enum HiddenApiRestriction {
WHITELIST(0, "whitelist", false),
GREYLIST(1, "greylist", false),
BLACKLIST(2, "blacklist", false),
GREYLIST_MAX_O(3, "greylist-max-o", false),
GREYLIST_MAX_P(4, "greylist-max-p", false),
GREYLIST_MAX_Q(5, "greylist-max-q", false),
GREYLIST_MAX_R(6, "greylist-max-r", false),
CORE_PLATFORM_API(8, "core-platform-api", true),
TEST_API(16, "test-api", true);
private static final HiddenApiRestriction[] hiddenApiFlags = new HiddenApiRestriction[] {
WHITELIST,
GREYLIST,
BLACKLIST,
GREYLIST_MAX_O,
GREYLIST_MAX_P,
GREYLIST_MAX_Q,
GREYLIST_MAX_R
};
private static final HiddenApiRestriction[] domainSpecificApiFlags = new HiddenApiRestriction[] {
CORE_PLATFORM_API,
TEST_API
};
private static final Map<String, HiddenApiRestriction> hiddenApiRestrictionsByName;
static {
hiddenApiRestrictionsByName = new HashMap<>();
for (HiddenApiRestriction hiddenApiRestriction : HiddenApiRestriction.values()) {
hiddenApiRestrictionsByName.put(hiddenApiRestriction.toString(), hiddenApiRestriction);
}
}
private static final int HIDDENAPI_FLAG_MASK = 0x7;
private final int value;
private final String name;
private final boolean isDomainSpecificApiFlag;
HiddenApiRestriction(int value, String name, boolean isDomainSpecificApiFlag) {
this.value = value;
this.name = name;
this.isDomainSpecificApiFlag = isDomainSpecificApiFlag;
}
public String toString() {
return name;
}
public int getValue() {
return value;
}
public boolean isSet(int value) {
if (isDomainSpecificApiFlag) {
return (value & this.value) != 0;
} else {
return (value & HIDDENAPI_FLAG_MASK) == this.value;
}
}
public boolean isDomainSpecificApiFlag() {
return isDomainSpecificApiFlag;
}
public static Set<HiddenApiRestriction> getAllFlags(int value) {
HiddenApiRestriction normalRestriction = hiddenApiFlags[value & HIDDENAPI_FLAG_MASK];
HashSet restrictionSet = new HashSet<HiddenApiRestriction>();
int domainSpecificPart = (value & ~HIDDENAPI_FLAG_MASK);
if (domainSpecificPart == 0) {
restrictionSet.add(normalRestriction);
return unmodifiableSet(restrictionSet);
}
restrictionSet.add(normalRestriction);
for (HiddenApiRestriction domainSpecificApiFlag : domainSpecificApiFlags) {
if (domainSpecificApiFlag.isSet(value)) {
restrictionSet.add(domainSpecificApiFlag);
}
}
return unmodifiableSet(restrictionSet);
}
public static String formatHiddenRestrictions(int value) {
StringJoiner joiner = new StringJoiner("|");
for (HiddenApiRestriction hiddenApiRestriction : getAllFlags(value)) {
joiner.add(hiddenApiRestriction.toString());
}
return joiner.toString();
}
public static int combineFlags(Iterable<HiddenApiRestriction> flags) {
boolean gotHiddenApiFlag = false;
int value = 0;
for (HiddenApiRestriction flag : flags) {
if (flag.isDomainSpecificApiFlag) {
value += flag.value;
} else {
if (gotHiddenApiFlag) {
throw new IllegalArgumentException(
"Cannot combine multiple flags for hidden api restrictions");
}
gotHiddenApiFlag = true;
value += flag.value;
}
}
return value;
}
public static HiddenApiRestriction forName(String name) {
return hiddenApiRestrictionsByName.get(name);
}
}
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