summary refs log tree commit diff
path: root/crypto/src/util/Strings.cs
blob: 147b6d3493980a2f1b2ce04410f1e681b7e96f03 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
using System;
using System.Text;

namespace Org.BouncyCastle.Utilities
{
    /// <summary> General string utilities.</summary>
    public static class Strings
    {
        internal static bool IsOneOf(string s, params string[] candidates)
        {
            foreach (string candidate in candidates)
            {
                if (s == candidate)
                    return true;
            }
            return false;
        }

        public static string FromByteArray(byte[] bs)
        {
#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
            return string.Create(bs.Length, bs, (chars, bytes) =>
            {
                for (int i = 0; i < chars.Length; ++i)
                {
                    chars[i] = Convert.ToChar(bytes[i]);
                }
            });
#else
            char[] cs = new char[bs.Length];
            for (int i = 0; i < cs.Length; ++i)
            {
                cs[i] = Convert.ToChar(bs[i]);
            }
            return new string(cs);
#endif
        }

        public static byte[] ToByteArray(char[] cs)
        {
            byte[] bs = new byte[cs.Length];
            for (int i = 0; i < bs.Length; ++i)
            {
                bs[i] = Convert.ToByte(cs[i]);
            }
            return bs;
        }

        public static byte[] ToByteArray(string s)
        {
            byte[] bs = new byte[s.Length];
            for (int i = 0; i < bs.Length; ++i)
            {
                bs[i] = Convert.ToByte(s[i]);
            }
            return bs;
        }

#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
        public static byte[] ToByteArray(ReadOnlySpan<char> cs)
        {
            byte[] bs = new byte[cs.Length];
            for (int i = 0; i < bs.Length; ++i)
            {
                bs[i] = Convert.ToByte(cs[i]);
            }
            return bs;
        }
#endif

        public static string FromAsciiByteArray(byte[] bytes)
        {
            return Encoding.ASCII.GetString(bytes);
        }

        public static byte[] ToAsciiByteArray(char[] cs)
        {
            return Encoding.ASCII.GetBytes(cs);
        }

        public static byte[] ToAsciiByteArray(string s)
        {
            return Encoding.ASCII.GetBytes(s);
        }

        public static string FromUtf8ByteArray(byte[] bytes)
        {
            return Encoding.UTF8.GetString(bytes);
        }

        public static string FromUtf8ByteArray(byte[] bytes, int index, int count)
        {
            return Encoding.UTF8.GetString(bytes, index, count);
        }

        public static byte[] ToUtf8ByteArray(char[] cs)
        {
            return Encoding.UTF8.GetBytes(cs);
        }

        public static byte[] ToUtf8ByteArray(string s)
        {
            return Encoding.UTF8.GetBytes(s);
        }

#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
        public static byte[] ToUtf8ByteArray(ReadOnlySpan<char> cs)
        {
            int count = Encoding.UTF8.GetByteCount(cs);
            byte[] bytes = new byte[count];
            Encoding.UTF8.GetBytes(cs, bytes);
            return bytes;
        }
#endif
    }
}