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Collation keys are not encoded in UTF-8

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The value returned when generating a collation key is an opaque binary
blob that is only meant to be used for byte-wise comparisons; we should
not imply it's a nul-terminated, UTF-8 string.

This is especially true for language bindings that try to convert C
strings returned by GLib into UTF-8 encoded strings.

Ideally, the collation functions should return a byte array, but the
closest thing we have is the OS native encoding type that we use for
paths and environment variables.

See: https://github.com/gtk-rs/gtk-rs-core/issues/1504
This commit is contained in:
Emmanuele Bassi 2024-09-09 16:58:38 +01:00
parent 2ec62d638d
commit 0630b8145d
1 changed files with 15 additions and 5 deletions
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18
glib/gunicollate.c
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@ -375,8 +375,13 @@ carbon_collate_key_for_filename (const gchar *str,
*
* Note that this function depends on the [current locale][setlocale].
*
* Returns: a newly allocated string. This string should
* be freed with g_free() when you are done with it.
* Note that the returned string is not guaranteed to be in any
* encoding, especially UTF-8. The returned value is meant to be
* used only for comparisons.
*
* Returns: (transfer full) (type filename): a newly allocated string.
* The contents of the string are only meant to be used when sorting.
* This string should be freed with g_free() when you are done with it.
**/
gchar *
g_utf8_collate_key (const gchar *str,
@ -504,8 +509,13 @@ g_utf8_collate_key (const gchar *str,
*
* Note that this function depends on the [current locale][setlocale].
*
* Returns: a newly allocated string. This string should
* be freed with g_free() when you are done with it.
* Note that the returned string is not guaranteed to be in any
* encoding, especially UTF-8. The returned value is meant to be
* used only for comparisons.
*
* Returns: (transfer full) (type filename): a newly allocated string.
* The contents of the string are only meant to be used when sorting.
* This string should be freed with g_free() when you are done with it.
*
* Since: 2.8
*/