84 lines
1.7 KiB
Go
84 lines
1.7 KiB
Go
package text
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func DetectEncoding(text string) map[string]int {
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charsets := map[string]int{
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"UTF-8": 0,
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"CP1251": 0,
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"KOI8-R": 0,
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"IBM866": 0,
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"ISO-8859-5": 0,
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"MAC": 0,
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}
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if len(text) == 0 {
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return charsets
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}
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utflower := 7
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utfupper := 5
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lowercase := 3
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uppercase := 1
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last_simb := 0
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for a := 0; a < len(text); a++ {
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char := int(text[a])
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// non-russian characters
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if char < 128 || char > 256 {
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continue
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}
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// UTF-8
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if (last_simb == 208) && ((char > 143 && char < 176) || char == 129) {
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charsets["UTF-8"] += (utfupper * 2)
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}
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if ((last_simb == 208) && ((char > 175 && char < 192) || char == 145)) || (last_simb == 209 && char > 127 && char < 144) {
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charsets["UTF-8"] += (utflower * 2)
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}
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// CP1251
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if (char > 223 && char < 256) || char == 184 {
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charsets["CP1251"] += lowercase
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}
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if (char > 191 && char < 224) || char == 168 {
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charsets["CP1251"] += uppercase
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}
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// KOI8-R
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if (char > 191 && char < 224) || char == 163 {
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charsets["KOI8-R"] += lowercase
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}
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if (char > 222 && char < 256) || char == 179 {
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charsets["KOI8-R"] += uppercase
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}
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// IBM866
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if (char > 159 && char < 176) || (char > 223 && char < 241) {
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charsets["IBM866"] += lowercase
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}
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if (char > 127 && char < 160) || char == 241 {
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charsets["IBM866"] += uppercase
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}
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// ISO-8859-5
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if (char > 207 && char < 240) || char == 161 {
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charsets["ISO-8859-5"] += lowercase
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}
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if (char > 175 && char < 208) || char == 241 {
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charsets["ISO-8859-5"] += uppercase
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}
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// MAC
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if char > 221 && char < 255 {
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charsets["MAC"] += lowercase
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}
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if char > 127 && char < 160 {
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charsets["MAC"] += uppercase
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}
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last_simb = char
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}
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return charsets
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}
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