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AK: Replace the mutable String::replace API with an immutable version

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This removes the awkward String::replace API which was the only String
API which mutated the String and replaces it with a new immutable
version that returns a new String with the replacements applied. This
also fixes a couple of UAFs that were caused by the use of this API.

As an optimization an equivalent StringView::replace API was also added
to remove an unnecessary String allocations in the format of:
`String { view }.replace(...);`
This commit is contained in:
Idan Horowitz 2021-09-11 02:15:44 +03:00
parent aba4c9579f
commit 6704961c82
26 changed files with 72 additions and 118 deletions
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16
Tests/AK/TestString.cpp
View file

@ -146,25 +146,21 @@ TEST_CASE(flystring)
TEST_CASE(replace)
{
String test_string = "Well, hello Friends!";
u32 replacements = test_string.replace("Friends", "Testers");
EXPECT(replacements == 1);
test_string = test_string.replace("Friends", "Testers");
EXPECT(test_string == "Well, hello Testers!");
replacements = test_string.replace("ell", "e're", true);
EXPECT(replacements == 2);
test_string = test_string.replace("ell", "e're", true);
EXPECT(test_string == "We're, he'reo Testers!");
replacements = test_string.replace("!", " :^)");
EXPECT(replacements == 1);
test_string = test_string.replace("!", " :^)");
EXPECT(test_string == "We're, he'reo Testers :^)");
test_string = String("111._.111._.111");
replacements = test_string.replace("111", "|||", true);
EXPECT(replacements == 3);
test_string = test_string.replace("111", "|||", true);
EXPECT(test_string == "|||._.|||._.|||");
replacements = test_string.replace("|||", "111");
EXPECT(replacements == 1);
test_string = test_string.replace("|||", "111");
EXPECT(test_string == "111._.|||._.|||");
}