77 lines
1.8 KiB
Go
77 lines
1.8 KiB
Go
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// Copyright 2018 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package abi
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import (
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"fmt"
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"math"
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"strconv"
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"strings"
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)
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// A FlagSet is a slice of bit-flags and their name.
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type FlagSet []struct {
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Flag uint64
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Name string
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}
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// Parse returns a pretty version of val, using the flag names for known flags.
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// Unknown flags remain numeric.
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func (s FlagSet) Parse(val uint64) string {
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var flags []string
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for _, f := range s {
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if val&f.Flag == f.Flag {
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flags = append(flags, f.Name)
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val &^= f.Flag
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}
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}
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if val != 0 {
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flags = append(flags, "0x"+strconv.FormatUint(val, 16))
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}
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return strings.Join(flags, "|")
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}
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// ValueSet is a slice of syscall values and their name. Parse will replace
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// values that exactly match an entry with its name.
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type ValueSet []struct {
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Value uint64
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Name string
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}
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// Parse returns the name of the value associated with `val`. Unknown values
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// are converted to hex.
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func (e ValueSet) Parse(val uint64) string {
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for _, f := range e {
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if val == f.Value {
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return f.Name
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}
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}
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return fmt.Sprintf("%#x", val)
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}
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// ParseName returns the flag value associated with 'name'. Returns false
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// if no value is found.
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func (e ValueSet) ParseName(name string) (uint64, bool) {
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for _, f := range e {
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if name == f.Name {
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return f.Value, true
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}
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}
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return math.MaxUint64, false
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}
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