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0f08a282ef
llvm/Support/Base64, fix its implementation and provide a decent test suite. Previous implementation code was using + operator instead of | to combine results, which is a problem when shifting signed values. (0xFF << 16) is implicitly converted to a (signed) int, and thus results in 0xffff0000, h is negative. Combining negative numbers with a + in that context is not what we want to do. This is a recommit of 5a1958f2673f8c771e406a7e309e160b432c9a79 with UB removved. This fixes https://github.com/llvm/llvm-project/issues/149. Differential Revision: https://reviews.llvm.org/D75057
53 lines
1.9 KiB
C++
53 lines
1.9 KiB
C++
//===- llvm/unittest/Support/Base64Test.cpp - Base64 tests
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//--------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements unit tests for the Base64 functions.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/Base64.h"
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#include "llvm/ADT/StringRef.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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namespace {
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/// Tests an arbitrary set of bytes passed as \p Input.
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void TestBase64(StringRef Input, StringRef Final) {
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auto Res = encodeBase64(Input);
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EXPECT_EQ(Res, Final);
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}
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} // namespace
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TEST(Base64Test, Base64) {
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// from: https://tools.ietf.org/html/rfc4648#section-10
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TestBase64("", "");
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TestBase64("f", "Zg==");
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TestBase64("fo", "Zm8=");
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TestBase64("foo", "Zm9v");
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TestBase64("foob", "Zm9vYg==");
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TestBase64("fooba", "Zm9vYmE=");
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TestBase64("foobar", "Zm9vYmFy");
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// With non-printable values.
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char NonPrintableVector[] = {0x00, 0x00, 0x00, 0x46,
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0x00, 0x08, (char)0xff, (char)0xee};
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TestBase64({NonPrintableVector, sizeof(NonPrintableVector)}, "AAAARgAI/+4=");
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// Large test case
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char LargeVector[] = {0x54, 0x68, 0x65, 0x20, 0x71, 0x75, 0x69, 0x63, 0x6b,
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0x20, 0x62, 0x72, 0x6f, 0x77, 0x6e, 0x20, 0x66, 0x6f,
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0x78, 0x20, 0x6a, 0x75, 0x6d, 0x70, 0x73, 0x20, 0x6f,
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0x76, 0x65, 0x72, 0x20, 0x31, 0x33, 0x20, 0x6c, 0x61,
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0x7a, 0x79, 0x20, 0x64, 0x6f, 0x67, 0x73, 0x2e};
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TestBase64({LargeVector, sizeof(LargeVector)},
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"VGhlIHF1aWNrIGJyb3duIGZveCBqdW1wcyBvdmVyIDEzIGxhenkgZG9ncy4=");
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}
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