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32 lines
691 B
Go
32 lines
691 B
Go
package quicktemplate
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func appendURLEncode(dst []byte, src string) []byte {
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n := len(src)
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if n > 0 {
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// Hint the compiler to remove bounds checks in the loop below.
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_ = src[n-1]
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}
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for i := 0; i < n; i++ {
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c := src[i]
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// See http://www.w3.org/TR/html5/forms.html#form-submission-algorithm
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if c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z' || c >= '0' && c <= '9' ||
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c == '-' || c == '.' || c == '_' {
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dst = append(dst, c)
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} else {
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if c == ' ' {
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dst = append(dst, '+')
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} else {
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dst = append(dst, '%', hexCharUpper(c>>4), hexCharUpper(c&15))
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}
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}
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}
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return dst
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}
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func hexCharUpper(c byte) byte {
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if c < 10 {
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return '0' + c
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}
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return c - 10 + 'A'
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}
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