/*
- * Copyright 2012 Facebook, Inc.
+ * Copyright 2016 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* limitations under the License.
*/
-//
// @author Kristina Holst (kholst@fb.com)
// @author Andrei Alexandrescu (andrei.alexandrescu@fb.com)
+#include <folly/Range.h>
+
+#include <folly/portability/Memory.h>
+#include <folly/portability/SysMman.h>
+
+#include <array>
+#include <iterator>
+#include <limits>
+#include <random>
+#include <string>
+#include <type_traits>
+#include <vector>
#include <boost/range/concepts.hpp>
+#include <boost/algorithm/string/trim.hpp>
#include <gtest/gtest.h>
-#include "folly/Range.h"
using namespace folly;
+using namespace folly::detail;
using namespace std;
+static_assert(std::is_literal_type<StringPiece>::value, "");
+
BOOST_CONCEPT_ASSERT((boost::RandomAccessRangeConcept<StringPiece>));
TEST(StringPiece, All) {
EXPECT_EQ(s.toString().find("notfound", 55), StringPiece::npos);
EXPECT_EQ(s.find("z", s.size()), StringPiece::npos);
EXPECT_EQ(s.find("z", 55), StringPiece::npos);
+ // empty needle
+ EXPECT_EQ(s.find(""), std::string().find(""));
+ EXPECT_EQ(s.find(""), 0);
+
+ // single char finds
+ EXPECT_EQ(s.find('b'), 3);
+ EXPECT_EQ(s.find('b', 3), 3);
+ EXPECT_EQ(s.find('b', 4), 6);
+ EXPECT_EQ(s.find('o', 2), 2);
+ EXPECT_EQ(s.find('y'), StringPiece::npos);
+ EXPECT_EQ(s.find('y', 1), StringPiece::npos);
+ EXPECT_EQ(s.find('o', 4), StringPiece::npos); // starting position too far
+ EXPECT_TRUE(s.contains('z'));
+ // starting pos that is obviously past the end -- This works for std::string
+ EXPECT_EQ(s.toString().find('y', 55), StringPiece::npos);
+ EXPECT_EQ(s.find('z', s.size()), StringPiece::npos);
+ EXPECT_EQ(s.find('z', 55), StringPiece::npos);
+ // null char
+ EXPECT_EQ(s.find('\0'), std::string().find('\0'));
+ EXPECT_EQ(s.find('\0'), StringPiece::npos);
+ EXPECT_FALSE(s.contains('\0'));
+
+ // single char rfinds
+ EXPECT_EQ(s.rfind('b'), 6);
+ EXPECT_EQ(s.rfind('y'), StringPiece::npos);
+ EXPECT_EQ(s.str().rfind('y'), StringPiece::npos);
+ EXPECT_EQ(ByteRange(s).rfind('b'), 6);
+ EXPECT_EQ(ByteRange(s).rfind('y'), StringPiece::npos);
+ // null char
+ EXPECT_EQ(s.rfind('\0'), s.str().rfind('\0'));
+ EXPECT_EQ(s.rfind('\0'), StringPiece::npos);
+
+ // find_first_of
+ s.reset(foobarbaz, strlen(foobarbaz));
+ EXPECT_EQ(s.find_first_of("bar"), 3);
+ EXPECT_EQ(s.find_first_of("ba", 3), 3);
+ EXPECT_EQ(s.find_first_of("ba", 4), 4);
+ EXPECT_TRUE(s.contains("bar"));
+ EXPECT_EQ(s.find_first_of("xyxy"), StringPiece::npos);
+ EXPECT_EQ(s.find_first_of("xyxy", 1), StringPiece::npos);
+ EXPECT_FALSE(s.contains("xyxy"));
+ // starting position too far
+ EXPECT_EQ(s.find_first_of("foo", 4), StringPiece::npos);
+ // starting pos that is obviously past the end -- This works for std::string
+ EXPECT_EQ(s.toString().find_first_of("xyxy", 55), StringPiece::npos);
+ EXPECT_EQ(s.find_first_of("z", s.size()), StringPiece::npos);
+ EXPECT_EQ(s.find_first_of("z", 55), StringPiece::npos);
+ // empty needle. Note that this returns npos, while find() returns 0!
+ EXPECT_EQ(s.find_first_of(""), std::string().find_first_of(""));
+ EXPECT_EQ(s.find_first_of(""), StringPiece::npos);
+
+ // single char find_first_ofs
+ EXPECT_EQ(s.find_first_of('b'), 3);
+ EXPECT_EQ(s.find_first_of('b', 3), 3);
+ EXPECT_EQ(s.find_first_of('b', 4), 6);
+ EXPECT_EQ(s.find_first_of('o', 2), 2);
+ EXPECT_EQ(s.find_first_of('y'), StringPiece::npos);
+ EXPECT_EQ(s.find_first_of('y', 1), StringPiece::npos);
+ // starting position too far
+ EXPECT_EQ(s.find_first_of('o', 4), StringPiece::npos);
+ // starting pos that is obviously past the end -- This works for std::string
+ EXPECT_EQ(s.toString().find_first_of('y', 55), StringPiece::npos);
+ EXPECT_EQ(s.find_first_of('z', s.size()), StringPiece::npos);
+ EXPECT_EQ(s.find_first_of('z', 55), StringPiece::npos);
+ // null char
+ EXPECT_EQ(s.find_first_of('\0'), std::string().find_first_of('\0'));
+ EXPECT_EQ(s.find_first_of('\0'), StringPiece::npos);
// just "barbaz"
s.reset(foobarbaz + 3, strlen(foobarbaz + 3));
EXPECT_EQ(s2, s);
}
+template <class T>
+void expectLT(const T& a, const T& b) {
+ EXPECT_TRUE(a < b);
+ EXPECT_TRUE(a <= b);
+ EXPECT_FALSE(a == b);
+ EXPECT_FALSE(a >= b);
+ EXPECT_FALSE(a > b);
+
+ EXPECT_FALSE(b < a);
+ EXPECT_FALSE(b <= a);
+ EXPECT_TRUE(b >= a);
+ EXPECT_TRUE(b > a);
+}
+
+template <class T>
+void expectEQ(const T& a, const T& b) {
+ EXPECT_FALSE(a < b);
+ EXPECT_TRUE(a <= b);
+ EXPECT_TRUE(a == b);
+ EXPECT_TRUE(a >= b);
+ EXPECT_FALSE(a > b);
+}
+
+TEST(StringPiece, EightBitComparisons) {
+ char values[] = {'\x00', '\x20', '\x40', '\x7f', '\x80', '\xc0', '\xff'};
+ constexpr size_t count = sizeof(values) / sizeof(values[0]);
+ for (size_t i = 0; i < count; ++i) {
+ std::string a(1, values[i]);
+ // Defeat copy-on-write
+ std::string aCopy(a.data(), a.size());
+ expectEQ(a, aCopy);
+ expectEQ(StringPiece(a), StringPiece(aCopy));
+
+ for (size_t j = i + 1; j < count; ++j) {
+ std::string b(1, values[j]);
+ expectLT(a, b);
+ expectLT(StringPiece(a), StringPiece(b));
+ }
+ }
+}
+
TEST(StringPiece, ToByteRange) {
StringPiece a("hello");
ByteRange b(a);
static_cast<const void*>(b.begin()));
EXPECT_EQ(static_cast<const void*>(a.end()),
static_cast<const void*>(b.end()));
+
+ // and convert back again
+ StringPiece c(b);
+ EXPECT_EQ(a.begin(), c.begin());
+ EXPECT_EQ(a.end(), c.end());
+}
+
+TEST(StringPiece, InvalidRange) {
+ StringPiece a("hello");
+ EXPECT_EQ(a, a.subpiece(0, 10));
+ EXPECT_EQ(StringPiece("ello"), a.subpiece(1));
+ EXPECT_EQ(StringPiece("ello"), a.subpiece(1, std::string::npos));
+ EXPECT_EQ(StringPiece("ell"), a.subpiece(1, 3));
+ EXPECT_THROW(a.subpiece(6, 7), std::out_of_range);
+ EXPECT_THROW(a.subpiece(6), std::out_of_range);
+
+ std::string b("hello");
+ EXPECT_EQ(a, StringPiece(b, 0, 10));
+ EXPECT_EQ("ello", a.subpiece(1));
+ EXPECT_EQ("ello", a.subpiece(1, std::string::npos));
+ EXPECT_EQ("ell", a.subpiece(1, 3));
+ EXPECT_THROW(a.subpiece(6, 7), std::out_of_range);
+ EXPECT_THROW(a.subpiece(6), std::out_of_range);
+}
+
+constexpr char helloArray[] = "hello";
+
+TEST(StringPiece, Constexpr) {
+ constexpr StringPiece hello1("hello");
+ EXPECT_EQ("hello", hello1);
+ static_assert(hello1.size() == 5, "hello size should be 5 at compile time");
+
+ constexpr StringPiece hello2(helloArray);
+ EXPECT_EQ("hello", hello2);
+ static_assert(hello2.size() == 5, "hello size should be 5 at compile time");
+}
+
+TEST(StringPiece, Prefix) {
+ StringPiece a("hello");
+ EXPECT_TRUE(a.startsWith(""));
+ EXPECT_TRUE(a.startsWith("h"));
+ EXPECT_TRUE(a.startsWith('h'));
+ EXPECT_TRUE(a.startsWith("hello"));
+ EXPECT_FALSE(a.startsWith("hellox"));
+ EXPECT_FALSE(a.startsWith('x'));
+ EXPECT_FALSE(a.startsWith("x"));
+
+ {
+ auto b = a;
+ EXPECT_TRUE(b.removePrefix(""));
+ EXPECT_EQ("hello", b);
+ }
+ {
+ auto b = a;
+ EXPECT_TRUE(b.removePrefix("h"));
+ EXPECT_EQ("ello", b);
+ }
+ {
+ auto b = a;
+ EXPECT_TRUE(b.removePrefix('h'));
+ EXPECT_EQ("ello", b);
+ }
+ {
+ auto b = a;
+ EXPECT_TRUE(b.removePrefix("hello"));
+ EXPECT_EQ("", b);
+ }
+ {
+ auto b = a;
+ EXPECT_FALSE(b.removePrefix("hellox"));
+ EXPECT_EQ("hello", b);
+ }
+ {
+ auto b = a;
+ EXPECT_FALSE(b.removePrefix("x"));
+ EXPECT_EQ("hello", b);
+ }
+ {
+ auto b = a;
+ EXPECT_FALSE(b.removePrefix('x'));
+ EXPECT_EQ("hello", b);
+ }
+}
+
+TEST(StringPiece, Suffix) {
+ StringPiece a("hello");
+ EXPECT_TRUE(a.endsWith(""));
+ EXPECT_TRUE(a.endsWith("o"));
+ EXPECT_TRUE(a.endsWith('o'));
+ EXPECT_TRUE(a.endsWith("hello"));
+ EXPECT_FALSE(a.endsWith("xhello"));
+ EXPECT_FALSE(a.endsWith("x"));
+ EXPECT_FALSE(a.endsWith('x'));
+
+ {
+ auto b = a;
+ EXPECT_TRUE(b.removeSuffix(""));
+ EXPECT_EQ("hello", b);
+ }
+ {
+ auto b = a;
+ EXPECT_TRUE(b.removeSuffix("o"));
+ EXPECT_EQ("hell", b);
+ }
+ {
+ auto b = a;
+ EXPECT_TRUE(b.removeSuffix('o'));
+ EXPECT_EQ("hell", b);
+ }
+ {
+ auto b = a;
+ EXPECT_TRUE(b.removeSuffix("hello"));
+ EXPECT_EQ("", b);
+ }
+ {
+ auto b = a;
+ EXPECT_FALSE(b.removeSuffix("xhello"));
+ EXPECT_EQ("hello", b);
+ }
+ {
+ auto b = a;
+ EXPECT_FALSE(b.removeSuffix("x"));
+ EXPECT_EQ("hello", b);
+ }
+ {
+ auto b = a;
+ EXPECT_FALSE(b.removeSuffix('x'));
+ EXPECT_EQ("hello", b);
+ }
+}
+
+TEST(StringPiece, PrefixEmpty) {
+ StringPiece a;
+ EXPECT_TRUE(a.startsWith(""));
+ EXPECT_FALSE(a.startsWith("a"));
+ EXPECT_FALSE(a.startsWith('a'));
+ EXPECT_TRUE(a.removePrefix(""));
+ EXPECT_EQ("", a);
+ EXPECT_FALSE(a.removePrefix("a"));
+ EXPECT_EQ("", a);
+ EXPECT_FALSE(a.removePrefix('a'));
+ EXPECT_EQ("", a);
+}
+
+TEST(StringPiece, SuffixEmpty) {
+ StringPiece a;
+ EXPECT_TRUE(a.endsWith(""));
+ EXPECT_FALSE(a.endsWith("a"));
+ EXPECT_FALSE(a.endsWith('a'));
+ EXPECT_TRUE(a.removeSuffix(""));
+ EXPECT_EQ("", a);
+ EXPECT_FALSE(a.removeSuffix("a"));
+ EXPECT_EQ("", a);
+ EXPECT_FALSE(a.removeSuffix('a'));
+ EXPECT_EQ("", a);
+}
+
+TEST(StringPiece, erase) {
+ StringPiece a("hello");
+ auto b = a.begin();
+ auto e = b + 1;
+ a.erase(b, e);
+ EXPECT_EQ("ello", a);
+
+ e = a.end();
+ b = e - 1;
+ a.erase(b, e);
+ EXPECT_EQ("ell", a);
+
+ b = a.end() - 1;
+ e = a.end() - 1;
+ EXPECT_THROW(a.erase(b, e), std::out_of_range);
+
+ b = a.begin();
+ e = a.end();
+ a.erase(b, e);
+ EXPECT_EQ("", a);
+
+ a = "hello";
+ b = a.begin();
+ e = b + 2;
+ a.erase(b, e);
+ EXPECT_EQ("llo", a);
+
+ b = a.end() - 2;
+ e = a.end();
+ a.erase(b, e);
+ EXPECT_EQ("l", a);
+
+ a = " hello ";
+ boost::algorithm::trim(a);
+ EXPECT_EQ(a, "hello");
+}
+
+TEST(StringPiece, split_step_char_delimiter) {
+ // 0 1 2
+ // 012345678901234567890123456
+ auto const s = "this is just a test string";
+ auto const e = std::next(s, std::strlen(s));
+ EXPECT_EQ('\0', *e);
+
+ folly::StringPiece p(s);
+ EXPECT_EQ(s, p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ(s, p);
+
+ auto x = p.split_step(' ');
+ EXPECT_EQ(std::next(s, 5), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("this", x);
+
+ x = p.split_step(' ');
+ EXPECT_EQ(std::next(s, 8), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("is", x);
+
+ x = p.split_step('u');
+ EXPECT_EQ(std::next(s, 10), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("j", x);
+
+ x = p.split_step(' ');
+ EXPECT_EQ(std::next(s, 13), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("st", x);
+
+ x = p.split_step(' ');
+ EXPECT_EQ(std::next(s, 14), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("", x);
+
+ x = p.split_step(' ');
+ EXPECT_EQ(std::next(s, 16), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("a", x);
+
+ x = p.split_step(' ');
+ EXPECT_EQ(std::next(s, 21), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("test", x);
+
+ x = p.split_step(' ');
+ EXPECT_EQ(e, p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("string", x);
+
+ x = p.split_step(' ');
+ EXPECT_EQ(e, p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("", x);
+}
+
+TEST(StringPiece, split_step_range_delimiter) {
+ // 0 1 2 3
+ // 0123456789012345678901234567890123
+ auto const s = "this is just a test string";
+ auto const e = std::next(s, std::strlen(s));
+ EXPECT_EQ('\0', *e);
+
+ folly::StringPiece p(s);
+ EXPECT_EQ(s, p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ(s, p);
+
+ auto x = p.split_step(" ");
+ EXPECT_EQ(std::next(s, 6), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("this", x);
+
+ x = p.split_step(" ");
+ EXPECT_EQ(std::next(s, 10), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("is", x);
+
+ x = p.split_step("u");
+ EXPECT_EQ(std::next(s, 12), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("j", x);
+
+ x = p.split_step(" ");
+ EXPECT_EQ(std::next(s, 16), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("st", x);
+
+ x = p.split_step(" ");
+ EXPECT_EQ(std::next(s, 18), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("", x);
+
+ x = p.split_step(" ");
+ EXPECT_EQ(std::next(s, 21), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("a", x);
+
+ x = p.split_step(" ");
+ EXPECT_EQ(std::next(s, 28), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ(" test", x);
+
+ x = p.split_step(" ");
+ EXPECT_EQ(e, p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("string", x);
+
+ x = p.split_step(" ");
+ EXPECT_EQ(e, p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("", x);
+
+ x = p.split_step(" ");
+ EXPECT_EQ(e, p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("", x);
+}
+
+void split_step_with_process_noop(folly::StringPiece) {}
+
+TEST(StringPiece, split_step_with_process_char_delimiter) {
+ // 0 1 2
+ // 012345678901234567890123456
+ auto const s = "this is just a test string";
+ auto const e = std::next(s, std::strlen(s));
+ EXPECT_EQ('\0', *e);
+
+ folly::StringPiece p(s);
+ EXPECT_EQ(s, p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ(s, p);
+
+ EXPECT_EQ(1, (p.split_step(' ', [&](folly::StringPiece x) {
+ EXPECT_EQ(std::next(s, 5), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("this", x);
+ return 1;
+ })));
+
+ EXPECT_EQ(2, (p.split_step(' ', [&](folly::StringPiece x) {
+ EXPECT_EQ(std::next(s, 8), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("is", x);
+ return 2;
+ })));
+
+ EXPECT_EQ(3, (p.split_step('u', [&](folly::StringPiece x) {
+ EXPECT_EQ(std::next(s, 10), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("j", x);
+ return 3;
+ })));
+
+ EXPECT_EQ(4, (p.split_step(' ', [&](folly::StringPiece x) {
+ EXPECT_EQ(std::next(s, 13), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("st", x);
+ return 4;
+ })));
+
+ EXPECT_EQ(5, (p.split_step(' ', [&](folly::StringPiece x) {
+ EXPECT_EQ(std::next(s, 14), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("", x);
+ return 5;
+ })));
+
+ EXPECT_EQ(6, (p.split_step(' ', [&](folly::StringPiece x) {
+ EXPECT_EQ(std::next(s, 16), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("a", x);
+ return 6;
+ })));
+
+ EXPECT_EQ(7, (p.split_step(' ', [&](folly::StringPiece x) {
+ EXPECT_EQ(std::next(s, 21), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("test", x);
+ return 7;
+ })));
+
+ EXPECT_EQ(8, (p.split_step(' ', [&](folly::StringPiece x) {
+ EXPECT_EQ(e, p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("string", x);
+ return 8;
+ })));
+
+ EXPECT_EQ(9, (p.split_step(' ', [&](folly::StringPiece x) {
+ EXPECT_EQ(e, p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("", x);
+ return 9;
+ })));
+
+ EXPECT_TRUE((std::is_same<
+ void,
+ decltype(p.split_step(' ', split_step_with_process_noop))
+ >::value));
+
+ EXPECT_NO_THROW(p.split_step(' ', split_step_with_process_noop));
+}
+
+TEST(StringPiece, split_step_with_process_range_delimiter) {
+ // 0 1 2 3
+ // 0123456789012345678901234567890123
+ auto const s = "this is just a test string";
+ auto const e = std::next(s, std::strlen(s));
+ EXPECT_EQ('\0', *e);
+
+ folly::StringPiece p(s);
+ EXPECT_EQ(s, p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ(s, p);
+
+ EXPECT_EQ(1, (p.split_step(" ", [&](folly::StringPiece x) {
+ EXPECT_EQ(std::next(s, 6), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("this", x);
+ return 1;
+ })));
+
+ EXPECT_EQ(2, (p.split_step(" ", [&](folly::StringPiece x) {
+ EXPECT_EQ(std::next(s, 10), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("is", x);
+ return 2;
+ })));
+
+ EXPECT_EQ(3, (p.split_step("u", [&](folly::StringPiece x) {
+ EXPECT_EQ(std::next(s, 12), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("j", x);
+ return 3;
+ })));
+
+ EXPECT_EQ(4, (p.split_step(" ", [&](folly::StringPiece x) {
+ EXPECT_EQ(std::next(s, 16), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("st", x);
+ return 4;
+ })));
+
+ EXPECT_EQ(5, (p.split_step(" ", [&](folly::StringPiece x) {
+ EXPECT_EQ(std::next(s, 18), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("", x);
+ return 5;
+ })));
+
+ EXPECT_EQ(6, (p.split_step(" ", [&](folly::StringPiece x) {
+ EXPECT_EQ(std::next(s, 21), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("a", x);
+ return 6;
+ })));
+
+ EXPECT_EQ(7, (p.split_step(" ", [&](folly::StringPiece x) {
+ EXPECT_EQ(std::next(s, 28), p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ(" test", x);
+ return 7;
+ })));
+
+ EXPECT_EQ(8, (p.split_step(" ", [&](folly::StringPiece x) {
+ EXPECT_EQ(e, p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("string", x);
+ return 8;
+ })));
+
+ EXPECT_EQ(9, (p.split_step(" ", [&](folly::StringPiece x) {
+ EXPECT_EQ(e, p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("", x);
+ return 9;
+ })));
+
+ EXPECT_EQ(10, (p.split_step(" ", [&](folly::StringPiece x) {
+ EXPECT_EQ(e, p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ("", x);
+ return 10;
+ })));
+
+ EXPECT_TRUE((std::is_same<
+ void,
+ decltype(p.split_step(' ', split_step_with_process_noop))
+ >::value));
+
+ EXPECT_NO_THROW(p.split_step(' ', split_step_with_process_noop));
+}
+
+TEST(StringPiece, split_step_with_process_char_delimiter_additional_args) {
+ // 0 1 2
+ // 012345678901234567890123456
+ auto const s = "this is just a test string";
+ auto const e = std::next(s, std::strlen(s));
+ auto const delimiter = ' ';
+ EXPECT_EQ('\0', *e);
+
+ folly::StringPiece p(s);
+ EXPECT_EQ(s, p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ(s, p);
+
+ auto const functor = [](
+ folly::StringPiece s,
+ folly::StringPiece expected
+ ) {
+ EXPECT_EQ(expected, s);
+ return expected;
+ };
+
+ auto const checker = [&](folly::StringPiece expected) {
+ EXPECT_EQ(expected, p.split_step(delimiter, functor, expected));
+ };
+
+ checker("this");
+ checker("is");
+ checker("just");
+ checker("");
+ checker("a");
+ checker("test");
+ checker("string");
+ checker("");
+ checker("");
+
+ EXPECT_TRUE(p.empty());
+}
+
+TEST(StringPiece, split_step_with_process_range_delimiter_additional_args) {
+ // 0 1 2 3
+ // 0123456789012345678901234567890123
+ auto const s = "this is just a test string";
+ auto const e = std::next(s, std::strlen(s));
+ auto const delimiter = " ";
+ EXPECT_EQ('\0', *e);
+
+ folly::StringPiece p(s);
+ EXPECT_EQ(s, p.begin());
+ EXPECT_EQ(e, p.end());
+ EXPECT_EQ(s, p);
+
+ auto const functor = [](
+ folly::StringPiece s,
+ folly::StringPiece expected
+ ) {
+ EXPECT_EQ(expected, s);
+ return expected;
+ };
+
+ auto const checker = [&](folly::StringPiece expected) {
+ EXPECT_EQ(expected, p.split_step(delimiter, functor, expected));
+ };
+
+ checker("this");
+ checker("is");
+ checker("just");
+ checker("");
+ checker("a");
+ checker(" test");
+ checker("string");
+ checker("");
+ checker("");
+
+ EXPECT_TRUE(p.empty());
+}
+
+TEST(StringPiece, NoInvalidImplicitConversions) {
+ struct IsString {
+ bool operator()(folly::Range<int*>) { return false; }
+ bool operator()(folly::StringPiece) { return true; }
+ };
+
+ std::string s = "hello";
+ EXPECT_TRUE(IsString()(s));
+}
+
+TEST(qfind, UInt32_Ranges) {
+ vector<uint32_t> a({1, 2, 3, 260, 5});
+ vector<uint32_t> b({2, 3, 4});
+
+ auto a_range = folly::Range<const uint32_t*>(&a[0], a.size());
+ auto b_range = folly::Range<const uint32_t*>(&b[0], b.size());
+
+ EXPECT_EQ(qfind(a_range, b_range), string::npos);
+
+ a[3] = 4;
+ EXPECT_EQ(qfind(a_range, b_range), 1);
+}
+
+template <typename NeedleFinder>
+class NeedleFinderTest : public ::testing::Test {
+ public:
+ static size_t find_first_byte_of(StringPiece haystack, StringPiece needles) {
+ return NeedleFinder::find_first_byte_of(haystack, needles);
+ }
+};
+
+struct SseNeedleFinder {
+ static size_t find_first_byte_of(StringPiece haystack, StringPiece needles) {
+ // This will only use the SSE version if it is supported on this CPU
+ // (selected using ifunc).
+ return detail::qfind_first_byte_of(haystack, needles);
+ }
+};
+
+struct NoSseNeedleFinder {
+ static size_t find_first_byte_of(StringPiece haystack, StringPiece needles) {
+ return detail::qfind_first_byte_of_nosse(haystack, needles);
+ }
+};
+
+struct ByteSetNeedleFinder {
+ static size_t find_first_byte_of(StringPiece haystack, StringPiece needles) {
+ return detail::qfind_first_byte_of_byteset(haystack, needles);
+ }
+};
+
+typedef ::testing::Types<SseNeedleFinder,
+ NoSseNeedleFinder,
+ ByteSetNeedleFinder> NeedleFinders;
+TYPED_TEST_CASE(NeedleFinderTest, NeedleFinders);
+
+TYPED_TEST(NeedleFinderTest, Null) {
+ { // null characters in the string
+ string s(10, char(0));
+ s[5] = 'b';
+ string delims("abc");
+ EXPECT_EQ(5, this->find_first_byte_of(s, delims));
+ }
+ { // null characters in delim
+ string s("abc");
+ string delims(10, char(0));
+ delims[3] = 'c';
+ delims[7] = 'b';
+ EXPECT_EQ(1, this->find_first_byte_of(s, delims));
+ }
+ { // range not terminated by null character
+ string buf = "abcdefghijklmnopqrstuvwxyz";
+ StringPiece s(buf.data() + 5, 3);
+ StringPiece delims("z");
+ EXPECT_EQ(string::npos, this->find_first_byte_of(s, delims));
+ }
+}
+
+TYPED_TEST(NeedleFinderTest, DelimDuplicates) {
+ string delims(1000, 'b');
+ EXPECT_EQ(1, this->find_first_byte_of("abc", delims));
+ EXPECT_EQ(string::npos, this->find_first_byte_of("ac", delims));
+}
+
+TYPED_TEST(NeedleFinderTest, Empty) {
+ string a = "abc";
+ string b = "";
+ EXPECT_EQ(string::npos, this->find_first_byte_of(a, b));
+ EXPECT_EQ(string::npos, this->find_first_byte_of(b, a));
+ EXPECT_EQ(string::npos, this->find_first_byte_of(b, b));
+}
+
+TYPED_TEST(NeedleFinderTest, Unaligned) {
+ // works correctly even if input buffers are not 16-byte aligned
+ string s = "0123456789ABCDEFGH";
+ for (size_t i = 0; i < s.size(); ++i) {
+ StringPiece a(s.c_str() + i);
+ for (size_t j = 0; j < s.size(); ++j) {
+ StringPiece b(s.c_str() + j);
+ EXPECT_EQ((i > j) ? 0 : j - i, this->find_first_byte_of(a, b));
+ }
+ }
+}
+
+// for some algorithms (specifically those that create a set of needles),
+// we check for the edge-case of _all_ possible needles being sought.
+TYPED_TEST(NeedleFinderTest, Needles256) {
+ string needles;
+ const auto minValue = std::numeric_limits<StringPiece::value_type>::min();
+ const auto maxValue = std::numeric_limits<StringPiece::value_type>::max();
+ // make the size ~big to avoid any edge-case branches for tiny haystacks
+ const int haystackSize = 50;
+ for (size_t i = minValue; i <= maxValue; i++) { // <=
+ needles.push_back(i);
+ }
+ EXPECT_EQ(StringPiece::npos, this->find_first_byte_of("", needles));
+ for (size_t i = minValue; i <= maxValue; i++) {
+ EXPECT_EQ(0, this->find_first_byte_of(string(haystackSize, i), needles));
+ }
+
+ needles.append("these are redundant characters");
+ EXPECT_EQ(StringPiece::npos, this->find_first_byte_of("", needles));
+ for (size_t i = minValue; i <= maxValue; i++) {
+ EXPECT_EQ(0, this->find_first_byte_of(string(haystackSize, i), needles));
+ }
+}
+
+TYPED_TEST(NeedleFinderTest, Base) {
+ for (size_t i = 0; i < 32; ++i) {
+ for (int j = 0; j < 32; ++j) {
+ string s = string(i, 'X') + "abca" + string(i, 'X');
+ string delims = string(j, 'Y') + "a" + string(j, 'Y');
+ EXPECT_EQ(i, this->find_first_byte_of(s, delims));
+ }
+ }
+}
+
+const size_t kPageSize = 4096;
+// Updates contents so that any read accesses past the last byte will
+// cause a SIGSEGV. It accomplishes this by changing access to the page that
+// begins immediately after the end of the contents (as allocators and mmap()
+// all operate on page boundaries, this is a reasonable assumption).
+// This function will also initialize buf, which caller must free().
+void createProtectedBuf(StringPiece& contents, char** buf) {
+ ASSERT_LE(contents.size(), kPageSize);
+ const size_t kSuccess = 0;
+ char* pageAlignedBuf = (char*)aligned_malloc(2 * kPageSize, kPageSize);
+ if (pageAlignedBuf == nullptr) {
+ ASSERT_FALSE(true);
+ }
+ // Protect the page after the first full page-aligned region of the
+ // malloc'ed buffer
+ mprotect(pageAlignedBuf + kPageSize, kPageSize, PROT_NONE);
+ size_t newBegin = kPageSize - contents.size();
+ memcpy(pageAlignedBuf + newBegin, contents.data(), contents.size());
+ contents.reset(pageAlignedBuf + newBegin, contents.size());
+ *buf = pageAlignedBuf;
+}
+
+void freeProtectedBuf(char* buf) {
+ mprotect(buf + kPageSize, kPageSize, PROT_READ | PROT_WRITE);
+ aligned_free(buf);
+}
+
+TYPED_TEST(NeedleFinderTest, NoSegFault) {
+ const string base = string(32, 'a') + string("b");
+ const string delims = string(32, 'c') + string("b");
+ for (int i = 0; i <= 32; i++) {
+ for (int j = 0; j <= 33; j++) {
+ for (int shouldFind = 0; shouldFind <= 1; ++shouldFind) {
+ StringPiece s1(base);
+ s1.advance(i);
+ ASSERT_TRUE(!s1.empty());
+ if (!shouldFind) {
+ s1.pop_back();
+ }
+ StringPiece s2(delims);
+ s2.advance(j);
+ char* buf1;
+ char* buf2;
+ createProtectedBuf(s1, &buf1);
+ createProtectedBuf(s2, &buf2);
+ // printf("s1: '%s' (%ld) \ts2: '%s' (%ld)\n",
+ // string(s1.data(), s1.size()).c_str(), s1.size(),
+ // string(s2.data(), s2.size()).c_str(), s2.size());
+ auto r1 = this->find_first_byte_of(s1, s2);
+ auto f1 = std::find_first_of(s1.begin(), s1.end(),
+ s2.begin(), s2.end());
+ auto e1 = (f1 == s1.end()) ? StringPiece::npos : f1 - s1.begin();
+ EXPECT_EQ(r1, e1);
+ auto r2 = this->find_first_byte_of(s2, s1);
+ auto f2 = std::find_first_of(s2.begin(), s2.end(),
+ s1.begin(), s1.end());
+ auto e2 = (f2 == s2.end()) ? StringPiece::npos : f2 - s2.begin();
+ EXPECT_EQ(r2, e2);
+ freeProtectedBuf(buf1);
+ freeProtectedBuf(buf2);
+ }
+ }
+ }
+}
+
+TEST(NonConstTest, StringPiece) {
+ std::string hello("hello");
+ MutableStringPiece sp(&hello.front(), hello.size());
+ sp[0] = 'x';
+ EXPECT_EQ("xello", hello);
+ {
+ StringPiece s(sp);
+ EXPECT_EQ("xello", s);
+ }
+ {
+ ByteRange r1(sp);
+ MutableByteRange r2(sp);
+ }
+}
+
+// Similar to the begin() template functions, but instread of returing
+// an iterator, return a pointer to data.
+template <class Container>
+typename Container::value_type* dataPtr(Container& cont) {
+ // NOTE: &cont[0] is undefined if cont is empty (it creates a
+ // reference to nullptr - which is not dereferenced, but still UBSAN).
+ return cont.data();
+}
+template <class T, size_t N>
+constexpr T* dataPtr(T (&arr)[N]) noexcept {
+ return &arr[0];
+}
+
+template<class C>
+void testRangeFunc(C&& x, size_t n) {
+ const auto& cx = x;
+ // type, conversion checks
+ Range<int*> r1 = range(std::forward<C>(x));
+ Range<const int*> r2 = range(std::forward<C>(x));
+ Range<const int*> r3 = range(cx);
+ Range<const int*> r5 = range(std::move(cx));
+ EXPECT_EQ(r1.begin(), dataPtr(x));
+ EXPECT_EQ(r1.end(), dataPtr(x) + n);
+ EXPECT_EQ(n, r1.size());
+ EXPECT_EQ(n, r2.size());
+ EXPECT_EQ(n, r3.size());
+ EXPECT_EQ(n, r5.size());
+}
+
+TEST(RangeFunc, Vector) {
+ std::vector<int> x;
+ testRangeFunc(x, 0);
+ x.push_back(2);
+ testRangeFunc(x, 1);
+ testRangeFunc(std::vector<int>{1, 2}, 2);
+}
+
+TEST(RangeFunc, Array) {
+ std::array<int, 3> x;
+ testRangeFunc(x, 3);
+}
+
+TEST(RangeFunc, CArray) {
+ int x[] {1, 2, 3, 4};
+ testRangeFunc(x, 4);
+}
+
+std::string get_rand_str(size_t size,
+ std::uniform_int_distribution<>& dist,
+ std::mt19937& gen) {
+ std::string ret(size, '\0');
+ for (size_t i = 0; i < size; ++i) {
+ ret[i] = static_cast<char>(dist(gen));
+ }
+
+ return ret;
+}
+
+namespace folly {
+bool operator==(MutableStringPiece mp, StringPiece sp) {
+ return mp.compare(sp) == 0;
+}
+
+bool operator==(StringPiece sp, MutableStringPiece mp) {
+ return mp.compare(sp) == 0;
+}
+}
+
+TEST(ReplaceAt, exhaustiveTest) {
+ char input[] = "this is nice and long input";
+ auto msp = MutableStringPiece(input);
+ auto str = std::string(input);
+ std::random_device rd;
+ std::mt19937 gen(rd());
+ std::uniform_int_distribution<> dist('a', 'z');
+
+ for (int i=0; i < 100; ++i) {
+ for (size_t j = 1; j <= msp.size(); ++j) {
+ auto replacement = get_rand_str(j, dist, gen);
+ for (size_t pos = 0; pos < msp.size() - j; ++pos) {
+ msp.replaceAt(pos, replacement);
+ str.replace(pos, replacement.size(), replacement);
+ EXPECT_EQ(msp.compare(str), 0);
+ }
+ }
+ }
+
+ // too far
+ EXPECT_EQ(msp.replaceAt(msp.size() - 2, StringPiece("meh")), false);
+}
+
+TEST(ReplaceAll, basicTest) {
+ char input[] = "this is nice and long input";
+ auto orig = std::string(input);
+ auto msp = MutableStringPiece(input);
+
+ EXPECT_EQ(msp.replaceAll("is", "si"), 2);
+ EXPECT_EQ("thsi si nice and long input", msp);
+ EXPECT_EQ(msp.replaceAll("si", "is"), 2);
+ EXPECT_EQ(msp, orig);
+
+ EXPECT_EQ(msp.replaceAll("abcd", "efgh"), 0); // nothing to replace
+ EXPECT_EQ(msp, orig);
+
+ // at the very beginning
+ EXPECT_EQ(msp.replaceAll("this", "siht"), 1);
+ EXPECT_EQ("siht is nice and long input", msp);
+ EXPECT_EQ(msp.replaceAll("siht", "this"), 1);
+ EXPECT_EQ(msp, orig);
+
+ // at the very end
+ EXPECT_EQ(msp.replaceAll("input", "soput"), 1);
+ EXPECT_EQ("this is nice and long soput", msp);
+ EXPECT_EQ(msp.replaceAll("soput", "input"), 1);
+ EXPECT_EQ(msp, orig);
+
+ // all spaces
+ EXPECT_EQ(msp.replaceAll(" ", "@"), 5);
+ EXPECT_EQ("this@is@nice@and@long@input", msp);
+ EXPECT_EQ(msp.replaceAll("@", " "), 5);
+ EXPECT_EQ(msp, orig);
+}
+
+TEST(ReplaceAll, randomTest) {
+ char input[] = "abcdefghijklmnoprstuwqz"; // no pattern repeata inside
+ auto orig = std::string(input);
+ auto msp = MutableStringPiece(input);
+
+ std::random_device rd;
+ std::mt19937 gen(rd());
+ std::uniform_int_distribution<> dist('A', 'Z');
+
+ for (int i=0; i < 100; ++i) {
+ for (size_t j = 1; j <= orig.size(); ++j) {
+ auto replacement = get_rand_str(j, dist, gen);
+ for (size_t pos = 0; pos < msp.size() - j; ++pos) {
+ auto piece = orig.substr(pos, j);
+ EXPECT_EQ(msp.replaceAll(piece, replacement), 1);
+ EXPECT_EQ(msp.find(replacement), pos);
+ EXPECT_EQ(msp.replaceAll(replacement, piece), 1);
+ EXPECT_EQ(msp, orig);
+ }
+ }
+ }
+}
+
+TEST(ReplaceAll, BadArg) {
+ int count = 0;
+ auto fst = "longer";
+ auto snd = "small";
+ char input[] = "meh meh meh";
+ auto all = MutableStringPiece(input);
+
+ try {
+ all.replaceAll(fst, snd);
+ } catch (std::invalid_argument&) {
+ ++count;
+ }
+
+ try {
+ all.replaceAll(snd, fst);
+ } catch (std::invalid_argument&) {
+ ++count;
+ }
+
+ EXPECT_EQ(count, 2);
+}
+
+TEST(Range, Constructors) {
+ vector<int> c = {1, 2, 3};
+ typedef Range<vector<int>::iterator> RangeType;
+ typedef Range<vector<int>::const_iterator> ConstRangeType;
+ RangeType cr(c.begin(), c.end());
+ auto subpiece1 = ConstRangeType(cr, 1, 5);
+ auto subpiece2 = ConstRangeType(cr, 1);
+ EXPECT_EQ(subpiece1.size(), 2);
+ EXPECT_EQ(subpiece1.begin(), subpiece2.begin());
+ EXPECT_EQ(subpiece1.end(), subpiece2.end());
}