need_uconvert
Tells if a string requires encoding conversion.
Description
Given a pointer to a string (`s'), a description of the type of the string
(`type'), and the type that you would like this string to be converted into
(`newtype'), this function tells you whether any conversion is required. No
conversion will be needed if `type' and `newtype' are the same, or if one
type is ASCII, the other is UTF-8, and the string contains only character
values less than 128. As a convenience shortcut, you can pass the value
U_CURRENT as either of the type parameters, to represent whatever text
encoding format is currently selected. Example:
if (need_uconvert(text, U_UTF8, U_CURRENT)) {
/* conversion is required */
}
Returns non-zero if any conversion is required or zero otherwise.
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