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https://github.com/kata-containers/kata-containers.git
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8311dffce3
QF1001: Distributing negation across terms and flipping operators, makes it easy for humans to process expressions at a time, vs evaluating a whole block and then flipping it and can allow for earlier exit Signed-off-by: stevenhorsman <steven@uk.ibm.com>
54 lines
1.1 KiB
Go
54 lines
1.1 KiB
Go
//
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// Copyright (c) 2017-2018 Intel Corporation
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//
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// SPDX-License-Identifier: Apache-2.0
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//
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package main
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import (
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"fmt"
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"regexp"
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"unicode"
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)
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// checkValid determines if the specified string is valid or not.
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// It looks for:
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//
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// - Invalid (unprintable) characters.
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// - Standard golang error strings added by the formatting functions into the
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// resulting strings when issues are detected.
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func checkValid(value string) error {
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if value == "" {
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return nil
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}
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for _, ch := range value {
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if !unicode.IsPrint(ch) && !unicode.IsSpace(ch) {
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return fmt.Errorf("character %v (%x) in value %v not printable", ch, ch, value)
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}
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}
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// See: https://golang.org/pkg/fmt/
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invalidPatterns := []string{
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`%!\(BADINDEX\)`,
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`%!\(BADPREC\)`,
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`%!\(BADWIDTH\)`,
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`%!\(EXTRA\b`,
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`%!\w\(MISSING\)`,
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}
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for _, pattern := range invalidPatterns {
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re := regexp.MustCompile(pattern)
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foundMissing := re.FindStringSubmatch(value)
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if foundMissing != nil {
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return fmt.Errorf("invalid pattern %q in value %v "+
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"suggests log creator programming error",
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pattern, value)
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}
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}
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return nil
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}
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