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efi_loader: carve out utf_to_cp()

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Carve out a function to translate a Unicode code point to an 8bit codepage.

Provide a unit test for the new function.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt
2021-02-27 14:08:36 +01:00
parent 70616a1ed8
commit 73bb90cabc
4 changed files with 71 additions and 16 deletions
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29
test/unicode_ut.c
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@@ -595,6 +595,35 @@ static int unicode_test_u16_strsize(struct unit_test_state *uts)
}
UNICODE_TEST(unicode_test_u16_strsize);
static int unicode_test_utf_to_cp(struct unit_test_state *uts)
{
int ret;
s32 c;
c = '\n';
ret = utf_to_cp(&c, codepage_437);
ut_asserteq(0, ret);
ut_asserteq('\n', c);
c = 'a';
ret = utf_to_cp(&c, codepage_437);
ut_asserteq(0, ret);
ut_asserteq('a', c);
c = 0x03c4; /* Greek small letter tau */
ret = utf_to_cp(&c, codepage_437);
ut_asserteq(0, ret);
ut_asserteq(0xe7, c);
c = 0x03a4; /* Greek capital letter tau */
ret = utf_to_cp(&c, codepage_437);
ut_asserteq(-ENOENT, ret);
ut_asserteq('?', c);
return 0;
}
UNICODE_TEST(unicode_test_utf_to_cp);
#ifdef CONFIG_EFI_LOADER
static int unicode_test_efi_create_indexed_name(struct unit_test_state *uts)
{