Платформа ЦРНП "Мирокод" для разработки проектов
https://git.mirocod.ru
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35 lines
812 B
35 lines
812 B
// Copyright 2021 The Gitea Authors. All rights reserved. |
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// Use of this source code is governed by a MIT-style |
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// license that can be found in the LICENSE file. |
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package util |
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import "unicode/utf8" |
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// SplitStringAtByteN splits a string at byte n accounting for rune boundaries. (Combining characters are not accounted for.) |
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func SplitStringAtByteN(input string, n int) (left, right string) { |
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if len(input) <= n { |
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left = input |
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return |
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} |
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if !utf8.ValidString(input) { |
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left = input[:n-3] + "..." |
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right = "..." + input[n-3:] |
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return |
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} |
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// in UTF8 "…" is 3 bytes so doesn't really gain us anything... |
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end := 0 |
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for end <= n-3 { |
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_, size := utf8.DecodeRuneInString(input[end:]) |
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if end+size > n-3 { |
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break |
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} |
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end += size |
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} |
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left = input[:end] + "…" |
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right = "…" + input[end:] |
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return |
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}
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