55 lines
2.1 KiB
Go
55 lines
2.1 KiB
Go
package xmlcheck
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import (
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"bytes"
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"fmt"
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"io"
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"unicode/utf8"
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)
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var cp1251Table = [128]rune{
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0x0402, 0x0403, 0x201A, 0x0453, 0x201E, 0x2026, 0x2020, 0x2021, // 80-87
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0x20AC, 0x2030, 0x0409, 0x2039, 0x040A, 0x040C, 0x040B, 0x040F, // 88-8F
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0x0452, 0x2018, 0x2019, 0x201C, 0x201D, 0x2022, 0x2013, 0x2014, // 90-97
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0xFFFD, 0x2122, 0x0459, 0x203A, 0x045A, 0x045C, 0x045B, 0x045F, // 98-9F
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0x00A0, 0x040E, 0x045E, 0x0408, 0x00A4, 0x0490, 0x00A6, 0x00A7, // A0-A7
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0x0401, 0x00A9, 0x0404, 0x00AB, 0x00AC, 0x00AD, 0x00AE, 0x0407, // A8-AF
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0x00B0, 0x00B1, 0x0406, 0x0456, 0x0491, 0x00B5, 0x00B6, 0x00B7, // B0-B7
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0x0451, 0x2116, 0x0454, 0x00BB, 0x0458, 0x0405, 0x0455, 0x0457, // B8-BF
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0x0410, 0x0411, 0x0412, 0x0413, 0x0414, 0x0415, 0x0416, 0x0417, // C0-C7
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0x0418, 0x0419, 0x041A, 0x041B, 0x041C, 0x041D, 0x041E, 0x041F, // C8-CF
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0x0420, 0x0421, 0x0422, 0x0423, 0x0424, 0x0425, 0x0426, 0x0427, // D0-D7
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0x0428, 0x0429, 0x042A, 0x042B, 0x042C, 0x042D, 0x042E, 0x042F, // D8-DF
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0x0430, 0x0431, 0x0432, 0x0433, 0x0434, 0x0435, 0x0436, 0x0437, // E0-E7
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0x0438, 0x0439, 0x043A, 0x043B, 0x043C, 0x043D, 0x043E, 0x043F, // E8-EF
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0x0440, 0x0441, 0x0442, 0x0443, 0x0444, 0x0445, 0x0446, 0x0447, // F0-F7
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0x0448, 0x0449, 0x044A, 0x044B, 0x044C, 0x044D, 0x044E, 0x044F, // F8-FF
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}
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func charsetReader(name string, r io.Reader) (io.Reader, error) {
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switch name {
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case "windows-1251", "Windows-1251", "WINDOWS-1251", "cp1251", "CP1251", "windows1251":
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data, err := io.ReadAll(r)
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if err != nil {
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return nil, err
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}
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result := make([]byte, 0, len(data)*2)
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for i, b := range data {
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if b < 0x80 {
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result = append(result, b)
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continue
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}
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runeValue := cp1251Table[b-0x80]
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if runeValue == utf8.RuneError {
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return nil, fmt.Errorf("неопределённый байт Windows-1251 0x%02X по смещению %d", b, i)
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}
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result = utf8.AppendRune(result, runeValue)
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}
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return bytes.NewReader(result), nil
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case "utf-8", "UTF-8", "utf8", "UTF8":
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return r, nil
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default:
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return nil, fmt.Errorf("неподдерживаемая кодировка XML %q", name)
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}
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}
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