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author | Chandler Carruth <chandlerc@gmail.com> | 2013-12-27 04:28:57 +0000 |
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committer | Chandler Carruth <chandlerc@gmail.com> | 2013-12-27 04:28:57 +0000 |
commit | 5ff21b411149095abb421c1e1263341360072cec (patch) | |
tree | d34de93b7beaf2c032c7f26de8e85291c9b30495 /unittests | |
parent | 52b162375ad7f0e1d820ae959031ac70e254aa3b (diff) | |
download | llvm-5ff21b411149095abb421c1e1263341360072cec.tar.gz llvm-5ff21b411149095abb421c1e1263341360072cec.tar.bz2 llvm-5ff21b411149095abb421c1e1263341360072cec.tar.xz |
Introduce a simple line-by-line iterator type into the Support library.
This is an iterator which you can build around a MemoryBuffer. It will
iterate through the non-empty, non-comment lines of the buffer as
a forward iterator. It should be small and reasonably fast (although it
could be made much faster if anyone cares, I don't really...).
This will be used to more simply support the text-based sample
profile file format, and is largely based on the original patch by
Diego. I've re-worked the style of it and separated it from the work of
producing a MemoryBuffer from a file which both simplifies the interface
and makes it easier to test.
The style of the API follows the C++ standard naming conventions to fit
in better with iterators in general, much like the Path and FileSystem
interfaces follow standard-based naming conventions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198068 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'unittests')
-rw-r--r-- | unittests/Support/CMakeLists.txt | 1 | ||||
-rw-r--r-- | unittests/Support/LineIteratorTest.cpp | 115 |
2 files changed, 116 insertions, 0 deletions
diff --git a/unittests/Support/CMakeLists.txt b/unittests/Support/CMakeLists.txt index 0abc2ffe1d..b3f0622e34 100644 --- a/unittests/Support/CMakeLists.txt +++ b/unittests/Support/CMakeLists.txt @@ -18,6 +18,7 @@ add_llvm_unittest(SupportTests ErrorOrTest.cpp FileOutputBufferTest.cpp LeakDetectorTest.cpp + LineIteratorTest.cpp LockFileManagerTest.cpp ManagedStatic.cpp MathExtrasTest.cpp diff --git a/unittests/Support/LineIteratorTest.cpp b/unittests/Support/LineIteratorTest.cpp new file mode 100644 index 0000000000..d684e25df5 --- /dev/null +++ b/unittests/Support/LineIteratorTest.cpp @@ -0,0 +1,115 @@ +//===- LineIterator.cpp - Unit tests --------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "llvm/Support/LineIterator.h" +#include "llvm/ADT/OwningPtr.h" +#include "llvm/Support/MemoryBuffer.h" +#include "gtest/gtest.h" + +using namespace llvm; +using namespace llvm::sys; + +namespace { + +TEST(LineIteratorTest, Basic) { + OwningPtr<MemoryBuffer> Buffer(MemoryBuffer::getMemBuffer("line 1\n" + "line 2\n" + "line 3")); + + line_iterator I = line_iterator(*Buffer), E; + + EXPECT_FALSE(I.is_at_eof()); + EXPECT_NE(E, I); + + EXPECT_EQ("line 1", *I); + EXPECT_EQ(1, I.line_number()); + ++I; + EXPECT_EQ("line 2", *I); + EXPECT_EQ(2, I.line_number()); + ++I; + EXPECT_EQ("line 3", *I); + EXPECT_EQ(3, I.line_number()); + ++I; + + EXPECT_TRUE(I.is_at_eof()); + EXPECT_EQ(E, I); +} + +TEST(LineIteratorTest, CommentSkipping) { + OwningPtr<MemoryBuffer> Buffer(MemoryBuffer::getMemBuffer("line 1\n" + "line 2\n" + "# Comment 1\n" + "line 4\n" + "# Comment 2")); + + line_iterator I = line_iterator(*Buffer, '#'), E; + + EXPECT_FALSE(I.is_at_eof()); + EXPECT_NE(E, I); + + EXPECT_EQ("line 1", *I); + EXPECT_EQ(1, I.line_number()); + ++I; + EXPECT_EQ("line 2", *I); + EXPECT_EQ(2, I.line_number()); + ++I; + EXPECT_EQ("line 4", *I); + EXPECT_EQ(4, I.line_number()); + ++I; + + EXPECT_TRUE(I.is_at_eof()); + EXPECT_EQ(E, I); +} + +TEST(LineIteratorTest, BlankSkipping) { + OwningPtr<MemoryBuffer> Buffer(MemoryBuffer::getMemBuffer("\n\n\n" + "line 1\n" + "\n\n\n" + "line 2\n" + "\n\n\n")); + + line_iterator I = line_iterator(*Buffer), E; + + EXPECT_FALSE(I.is_at_eof()); + EXPECT_NE(E, I); + + EXPECT_EQ("line 1", *I); + EXPECT_EQ(4, I.line_number()); + ++I; + EXPECT_EQ("line 2", *I); + EXPECT_EQ(8, I.line_number()); + ++I; + + EXPECT_TRUE(I.is_at_eof()); + EXPECT_EQ(E, I); +} + +TEST(LineIteratorTest, EmptyBuffers) { + OwningPtr<MemoryBuffer> Buffer(MemoryBuffer::getMemBuffer("")); + EXPECT_TRUE(line_iterator(*Buffer).is_at_eof()); + EXPECT_EQ(line_iterator(), line_iterator(*Buffer)); + + Buffer.reset(MemoryBuffer::getMemBuffer("\n\n\n")); + EXPECT_TRUE(line_iterator(*Buffer).is_at_eof()); + EXPECT_EQ(line_iterator(), line_iterator(*Buffer)); + + Buffer.reset(MemoryBuffer::getMemBuffer("# foo\n" + "\n" + "# bar")); + EXPECT_TRUE(line_iterator(*Buffer, '#').is_at_eof()); + EXPECT_EQ(line_iterator(), line_iterator(*Buffer, '#')); + + Buffer.reset(MemoryBuffer::getMemBuffer("\n" + "# baz\n" + "\n")); + EXPECT_TRUE(line_iterator(*Buffer, '#').is_at_eof()); + EXPECT_EQ(line_iterator(), line_iterator(*Buffer, '#')); +} + +} // anonymous namespace |