tetragon

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// SPDX-License-Identifier: Apache-2.0
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// Copyright Authors of Tetragon
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package strutils
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import (
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	"strconv"
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	"strings"
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)
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// UTF8FromBPFBytes transforms bpf (C) strings to valid utf-8 strings
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//
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// NB(kkourt): strings we get from BPF/kernel are C strings: null-terminated sequence of bytes. They
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// may or may not be valid utf-8 strings. This is true for pathnames (cwd, binary) as well as
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// program arguments. Many of these fields, however, are represented as the protobuf string type,
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// which always has to be utf-8 encoded.
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//
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// This function ensures that by replacing all invalid runes with '�'.
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//
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// Note that this approach means that we loose information.
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// Alternatively, we could use strconf.Quote() or similar to quote the strings but this would add
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// overhead and it will also break the way we 've been representing strings up until now. A better
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// solution would be to update the fields in the proto description to be bytes, and let the proto
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// clients (e.g., tetra CLI and JSON writer) choose their preffered approach.
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func UTF8FromBPFBytes(b []byte) string {
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	return strings.ToValidUTF8(string(b), "�")
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}
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func ParseSize(str string) (int, error) {
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	suffix := str[len(str)-1:]
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	if !strings.Contains("KMG", suffix) {
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		return strconv.Atoi(str)
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	}
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	val, err := strconv.Atoi(str[0 : len(str)-1])
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	if err != nil {
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		return 0, err
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	}
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	switch suffix {
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	case "K":
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		return val * 1024, nil
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	case "M":
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		return val * 1024 * 1024, nil
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	case "G":
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		return val * 1024 * 1024 * 1024, nil
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	}
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	// never reached
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	return 0, nil
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}
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