/*
 * Copyright (C) 2018 The Android Open Source Project
 *
 * 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 <dex2oat_return_codes.h>

namespace android {
namespace installd {

// Constants for exit codes that installd code emits. These are failure situations before calling
// any tools, e.g., in validation, and must not overlap with the exit codes of tools, so they
// can be distinguished.
enum DexoptReturnCodes : int {
    kSetGid = 64,
    kSetUid = 65,
    kCapSet = 66,
    kFlock = 67,
    kProfmanExec = 68,
    kSetSchedPolicy = 70,
    kSetPriority = 71,
    kDex2oatExec = 72,
    kInstructionSetLength = 73,
    kHashValidatePath = 74,
    kHashOpenPath = 75,
    kHashReadDex = 76,
    kHashWrite = 77,
};

inline const char* get_installd_return_code_name(DexoptReturnCodes code) {
    switch (code) {
        case kSetGid:
            return "setgid";
        case kSetUid:
            return "setuid";
        case kCapSet:
            return "capset";
        case kFlock:
            return "flock";
        case kProfmanExec:
            return "exec(profman)";
        case kSetSchedPolicy:
            return "setschedpolicy";
        case kSetPriority:
            return "setpriority";
        case kDex2oatExec:
            return "exec(dex2oat)";
        case kInstructionSetLength:
            return "instruction-set-length";
        case kHashValidatePath:
            return "hash(validate-path)";
        case kHashOpenPath:
            return "hash(open-path)";
        case kHashReadDex:
            return "hash(read-dex)";
        case kHashWrite:
            return "hash(write)";
    }
    return nullptr;
}

inline const char* get_dex2oat_return_code_name(art::dex2oat::ReturnCode code) {
    switch (code) {
        case art::dex2oat::ReturnCode::kNoFailure:
            return "dex2oat success";
        case art::dex2oat::ReturnCode::kOther:
            return "unspecified dex2oat error";
        case art::dex2oat::ReturnCode::kCreateRuntime:
            return "dex2oat failed to create a runtime";
    }
    return nullptr;
}

// Get some slightly descriptive string for the return code. Handles both DexoptReturnCodes (local
// exit codes) as well as art::dex2oat::ReturnCode.
inline const char* get_return_code_name(int code) {
    // Try to enforce non-overlap (see comment on DexoptReturnCodes)
    // TODO: How could switch-case checks be used to enforce completeness?
    switch (code) {
        case kSetGid:
        case kSetUid:
        case kCapSet:
        case kFlock:
        case kProfmanExec:
        case kSetSchedPolicy:
        case kSetPriority:
        case kDex2oatExec:
        case kInstructionSetLength:
        case kHashValidatePath:
        case kHashOpenPath:
        case kHashReadDex:
        case kHashWrite:
            break;
        case static_cast<int>(art::dex2oat::ReturnCode::kNoFailure):
        case static_cast<int>(art::dex2oat::ReturnCode::kOther):
        case static_cast<int>(art::dex2oat::ReturnCode::kCreateRuntime):
            break;
    }
    const char* value = get_installd_return_code_name(static_cast<DexoptReturnCodes>(code));
    if (value != nullptr) {
        return value;
    }
    value = get_dex2oat_return_code_name(static_cast<art::dex2oat::ReturnCode>(code));
    return value;
}

}  // namespace installd
}  // namespace android