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Bug 1456189 - Simplify BufferList::Extract to make the lifetimes clearer. r=froydnj, a=RyanVM

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This commit is contained in:
Alex Gaynor 2018-05-18 18:59:00 -04:00 • committed by Roy Tam
commit 921ff8f640
2 changed files with 115 additions and 47 deletions
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33
mfbt/tests/TestBufferList.cpp
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@ -245,12 +245,39 @@ int main(void)
BufferList bl3 = bl.Extract(iter, kExtractOverSize, &success);
MOZ_RELEASE_ASSERT(!success);
MOZ_RELEASE_ASSERT(iter.AdvanceAcrossSegments(bl, kSmallWrite * 3 - kExtractSize - kExtractStart));
MOZ_RELEASE_ASSERT(iter.Done());
iter = bl2.Iter();
MOZ_RELEASE_ASSERT(iter.AdvanceAcrossSegments(bl2, kExtractSize));
MOZ_RELEASE_ASSERT(iter.Done());
BufferList bl4(8, 8, 8);
bl4.WriteBytes("abcd1234", 8);
iter = bl4.Iter();
iter.Advance(bl4, 8);
BufferList bl5 = bl4.Extract(iter, kExtractSize, &success);
MOZ_RELEASE_ASSERT(!success);
BufferList bl6(0, 0, 16);
bl6.WriteBytes("abcdefgh12345678", 16);
bl6.WriteBytes("ijklmnop87654321", 16);
iter = bl6.Iter();
iter.Advance(bl6, 8);
BufferList bl7 = bl6.Extract(iter, 16, &success);
MOZ_RELEASE_ASSERT(success);
char data[16];
MOZ_RELEASE_ASSERT(bl6.ReadBytes(iter, data, 8));
MOZ_RELEASE_ASSERT(memcmp(data, "87654321", 8) == 0);
iter = bl7.Iter();
MOZ_RELEASE_ASSERT(bl7.ReadBytes(iter, data, 16));
MOZ_RELEASE_ASSERT(memcmp(data, "12345678ijklmnop", 16) == 0);
BufferList bl8(0, 0, 16);
bl8.WriteBytes("abcdefgh12345678", 16);
iter = bl8.Iter();
BufferList bl9 = bl8.Extract(iter, 8, &success);
MOZ_RELEASE_ASSERT(success);
MOZ_RELEASE_ASSERT(bl9.Size() == 8);
MOZ_RELEASE_ASSERT(!iter.Done());
return 0;
}