Foundation (?) mangles diacriticals in Greek Extended (U+1F54)

Question

fritza OP

Created 5d

Replies 1

Boosts 0

Participants 2

(NOTE: In sum, this is destructive of user data.)

The client is a professor of Classics in constant need of properly-rendered glyphs that represent legitimate code points. As an example, the correct spelling might be:

εὔτρητος

It is spelled and rendered as intended. A file by this name will be correctly spelled by ls in the Terminal. Note that two diacritics are applied to the second letter, an upsilon (ὔ)

However, the Finder displays that file as

ἐύτρητος

and iterating the string reveals that the accents are improperly distributed over the two. This would never be correct.

This handicaps digital-humanities researchers from college to postdoctoral work.

A Character by Character iteration demonstrates the mangling.:

intended  (εὔτρητος)
displayed (ἐύτρητος) 


3B5 (ε)      1F10 (ἐ)	
	GREEK SMALL LETTER EPSILON, 
	GREEK SMALL LETTER EPSILON WITH PSILI
1F54 (ὔ)      3CD (ύ)
	GREEK SMALL LETTER UPSILON WITH PSILI AND OXIA
	GREEK SMALL LETTER UPSILON WITH TONOS
3C4 (τ)      3C4 (τ)
	(back in sync)
3C1 (ρ)      3C1 (ρ)
3B7 (η)      3B7 (η)
3C4 (τ)      3C4 (τ)
3BF (ο)      3BF (ο)
3C2 (ς)      3C2 (ς)

I don't want to muddy the waters by guessing where and how the mistake is made, just see for yourself.

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Answer 1

DTS Engineer OP

Apple

4d

AFAICT these two strings are different and both Finder and Terminal render them in the same way. Consider this program:

import Darwin

let name1 = "\u{03B5}\u{1F54}\u{03C4}\u{03C1}\u{03B7}\u{03C4}\u{03BF}\u{03C2}"
let name2 = "\u{1F10}\u{03CD}\u{03C4}\u{03C1}\u{03B7}\u{03C4}\u{03BF}\u{03C2}"

func test(_ name: String) {
    let path = "/Users/quinn/Test/" + name
    creat(path, 0o666)
}

func main() {
    test(name1)
    test(name2)
}

main()

I ran this on my Mac (macOS 15.3.1) and then viewed the resulting directories in Finder:

and Terminal:

Both environments show both file names, and both seem to render the way you’re expecting.

What am I missing here?

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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
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