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package internal
func IsUpper(c byte) bool {
return c >= 'A' && c <= 'Z'
}
func IsLower(c byte) bool {
return c >= 'a' && c <= 'z'
}
func ToUpper(c byte) byte {
return c - 32
}
func ToLower(c byte) byte {
return c + 32
}
// Underscore converts "CamelCasedString" to "camel_cased_string".
func Underscore(s string) string {
r := make([]byte, 0, len(s)+5)
for i := 0; i < len(s); i++ {
c := s[i]
if IsUpper(c) {
if i > 0 && i+1 < len(s) && (IsLower(s[i-1]) || IsLower(s[i+1])) {
r = append(r, '_', ToLower(c))
} else {
r = append(r, ToLower(c))
}
} else {
r = append(r, c)
}
}
return string(r)
}
func CamelCased(s string) string {
r := make([]byte, 0, len(s))
upperNext := true
for i := 0; i < len(s); i++ {
c := s[i]
if c == '_' {
upperNext = true
continue
}
if upperNext {
if IsLower(c) {
c = ToUpper(c)
}
upperNext = false
}
r = append(r, c)
}
return string(r)
}
func ToExported(s string) string {
if len(s) == 0 {
return s
}
if c := s[0]; IsLower(c) {
b := []byte(s)
b[0] = ToUpper(c)
return string(b)
}
return s
}
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