sandbox/linux/bpf_dsl: remove ErrorCode intermediary representation

sandbox/linux/bpf_dsl/errorcode.cc

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "sandbox/linux/bpf_dsl/errorcode.h"
-
-#include "base/logging.h"
-#include "sandbox/linux/system_headers/linux_seccomp.h"
-
-namespace sandbox {
-namespace bpf_dsl {
-
-ErrorCode::ErrorCode() : error_type_(ET_INVALID), err_(SECCOMP_RET_INVALID) {}
-
-ErrorCode::ErrorCode(int err) {
-  switch (err) {
-    case ERR_ALLOWED:
-      err_ = SECCOMP_RET_ALLOW;
-      error_type_ = ET_SIMPLE;
-      break;
-    case ERR_KILL:
-      err_ = SECCOMP_RET_KILL;
-      error_type_ = ET_SIMPLE;
-      break;
-    case ERR_MIN_ERRNO... ERR_MAX_ERRNO:
-      err_ = SECCOMP_RET_ERRNO + err;
-      error_type_ = ET_SIMPLE;
-      break;
-    default:
-      if ((err & ~SECCOMP_RET_DATA) == ERR_TRACE) {
-        err_ = SECCOMP_RET_TRACE + (err & SECCOMP_RET_DATA);
-        error_type_ = ET_SIMPLE;
-        break;
-      }
-      LOG(FATAL) << "Invalid use of ErrorCode object";
-  }
-}
-
-ErrorCode::ErrorCode(uint16_t trap_id,
-                     TrapRegistry::TrapFnc fnc,
-                     const void* aux,
-                     bool safe)
-    : error_type_(ET_TRAP),
-      fnc_(fnc),
-      aux_(const_cast<void*>(aux)),
-      safe_(safe),
-      err_(SECCOMP_RET_TRAP + trap_id) {}
-
-ErrorCode::ErrorCode(int argno,
-                     ArgType width,
-                     uint64_t mask,
-                     uint64_t value,
-                     const ErrorCode* passed,
-                     const ErrorCode* failed)
-    : error_type_(ET_COND),
-      mask_(mask),
-      value_(value),
-      argno_(argno),
-      width_(width),
-      passed_(passed),
-      failed_(failed),
-      err_(SECCOMP_RET_INVALID) {}
-
-bool ErrorCode::Equals(const ErrorCode& err) const {
-  if (error_type_ == ET_INVALID || err.error_type_ == ET_INVALID) {
-    LOG(FATAL) << "Dereferencing invalid ErrorCode";
-  }
-  if (error_type_ != err.error_type_) {
-    return false;
-  }
-  if (error_type_ == ET_SIMPLE || error_type_ == ET_TRAP) {
-    return err_ == err.err_;
-  } else if (error_type_ == ET_COND) {
-    return mask_ == err.mask_ && value_ == err.value_ && argno_ == err.argno_ &&
-           width_ == err.width_ && passed_->Equals(*err.passed_) &&
-           failed_->Equals(*err.failed_);
-  } else {
-    LOG(FATAL) << "Corrupted ErrorCode";
-    return false;
-  }
-}
-
-bool ErrorCode::LessThan(const ErrorCode& err) const {
-  // Implementing a "LessThan()" operator allows us to use ErrorCode objects
-  // as keys in STL containers; most notably, it also allows us to put them
-  // into std::set<>. Actual ordering is not important as long as it is
-  // deterministic.
-  if (error_type_ == ET_INVALID || err.error_type_ == ET_INVALID) {
-    LOG(FATAL) << "Dereferencing invalid ErrorCode";
-  }
-  if (error_type_ != err.error_type_) {
-    return error_type_ < err.error_type_;
-  } else {
-    if (error_type_ == ET_SIMPLE || error_type_ == ET_TRAP) {
-      return err_ < err.err_;
-    } else if (error_type_ == ET_COND) {
-      if (mask_ != err.mask_) {
-        return mask_ < err.mask_;
-      } else if (value_ != err.value_) {
-        return value_ < err.value_;
-      } else if (argno_ != err.argno_) {
-        return argno_ < err.argno_;
-      } else if (width_ != err.width_) {
-        return width_ < err.width_;
-      } else if (!passed_->Equals(*err.passed_)) {
-        return passed_->LessThan(*err.passed_);
-      } else if (!failed_->Equals(*err.failed_)) {
-        return failed_->LessThan(*err.failed_);
-      } else {
-        return false;
-      }
-    } else {
-      LOG(FATAL) << "Corrupted ErrorCode";
-      return false;
-    }
-  }
-}
-
-}  // namespace bpf_dsl
-}  // namespace sandbox