luc14n0/glib
1
0
Fork 0
mirror of https://gitlab.gnome.org/GNOME/glib.git synced 2025-01-23 20:46:14 +01:00
Code Issues Packages Projects Releases Wiki Activity

Document, that the second part of a decompose() wouldn't decompose()

Browse Source 
This is not directly documented in Unicode, or I couldn't find it,
but the test I just added confirms that it is currently the case.
This commit is contained in:
Behdad Esfahbod 2011-07-14 16:26:58 -04:00
parent f4cf6c3db0
commit 89a5d17d58
2 changed files with 23 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
glib/gunidecomp.c
View File

@ -625,6 +625,13 @@ compose_hangul_step (gunichar a,
* If @ch is not decomposable, *@a is set to @ch and *@b
* is set to zero.
*
* Note that the way Unicode decomposition pairs are
* defined, it is guaranteed that @b would not decompose
* further, but @a may itself decompose. To get the full
* canonical decomposition for @ch, one would need to
* recursively call this function on @a. Or use
* g_unicode_canonical_decomposition().
*
* See <ulink url="http://unicode.org/reports/tr15/">UAX#15</ulink>
* for details.
*

16
glib/tests/unicode.c
View File

@ -525,6 +525,21 @@ test_canonical_decomposition (void)
TEST2 (0xCE20, 0x110E, 0x1173);
}
static void
test_decompose_tail (void)
{
gunichar ch, a, b, c, d;
/* Test that whenever a char ch decomposes into a and b, b itself
* won't decompose any further. */
for (ch = 0; ch < 0x110000; ch++)
if (g_unichar_decompose (ch, &a, &b))
g_assert (!g_unichar_decompose (b, &c, &d));
else
g_assert (a == ch && b == 0);
}
int
main (int argc,
char *argv[])
@ -543,6 +558,7 @@ main (int argc,
g_test_add_func ("/unicode/compose", test_compose);
g_test_add_func ("/unicode/decompose", test_decompose);
g_test_add_func ("/unicode/canonical-decomposition", test_canonical_decomposition);
g_test_add_func ("/unicode/decompose-tail", test_decompose_tail);
return g_test_run();
}