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https://github.com/vbatts/go-mtree.git
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d02f298ad4
testify makes most bog-standard test checks much easier to read and maintain, and is quite widely used. It wasn't really well known back when govis was first written, but the migration is fairly straight-forward for most tests. Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
81 lines
2.7 KiB
Go
81 lines
2.7 KiB
Go
/*
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* govis: unicode aware vis(3) encoding implementation
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* Copyright (C) 2017 SUSE LLC.
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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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*/
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package govis
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import (
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"strconv"
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"strings"
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)
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// VisFlag manipulates how the characters are encoded/decoded
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type VisFlag uint
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// vis() has a variety of flags when deciding what encodings to use. While
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// mtree only uses one set of flags, implementing them all is necessary in
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// order to have compatibility with BSD's vis() and unvis() commands.
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const (
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VisOctal VisFlag = (1 << iota) // VIS_OCTAL: Use octal \ddd format.
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VisCStyle // VIS_CSTYLE: Use \[nrft0..] where appropriate.
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VisSpace // VIS_SP: Also encode space.
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VisTab // VIS_TAB: Also encode tab.
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VisNewline // VIS_NL: Also encode newline.
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VisSafe // VIS_SAFE: Encode unsafe characters.
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VisNoSlash // VIS_NOSLASH: Inhibit printing '\'.
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VisHTTPStyle // VIS_HTTPSTYLE: HTTP-style escape %xx.
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VisGlob // VIS_GLOB: Encode glob(3) magics.
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visMask VisFlag = (1 << iota) - 1 // Mask of all flags.
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VisWhite VisFlag = (VisSpace | VisTab | VisNewline)
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)
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// String pretty-prints VisFlag.
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func (vflags VisFlag) String() string {
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flagNames := []struct {
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name string
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bits VisFlag
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}{
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{"VisOctal", VisOctal},
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{"VisCStyle", VisCStyle},
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{"VisSpace", VisSpace},
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{"VisTab", VisTab},
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{"VisNewline", VisNewline},
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{"VisSafe", VisSafe},
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{"VisNoSlash", VisNoSlash},
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{"VisHTTPStyle", VisHTTPStyle},
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{"VisGlob", VisGlob},
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}
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var (
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flagSet = make([]string, 0, len(flagNames))
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seenBits VisFlag
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)
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for _, flag := range flagNames {
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if vflags&flag.bits == flag.bits {
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seenBits |= flag.bits
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flagSet = append(flagSet, flag.name)
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}
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}
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// If there were any remaining flags specified we don't know the name of,
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// just add them in an 0x... format.
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if remaining := vflags &^ seenBits; remaining != 0 {
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flagSet = append(flagSet, "0x"+strconv.FormatUint(uint64(remaining), 16))
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}
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if len(flagSet) == 0 {
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return "0"
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}
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return strings.Join(flagSet, "|")
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}
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