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//===-- ErrnoSetterMatcher.h ------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIBC_TEST_ERRNOSETTERMATCHER_H
#define LLVM_LIBC_TEST_ERRNOSETTERMATCHER_H
#include "src/__support/FPUtil/FPBits.h"
#include "src/__support/FPUtil/fpbits_str.h"
#include "src/__support/StringUtil/error_to_string.h"
#include "src/__support/macros/config.h"
#include "src/__support/macros/properties/architectures.h"
#include "src/errno/libc_errno.h"
#include "test/UnitTest/Test.h"
namespace LIBC_NAMESPACE_DECL {
namespace testing {
namespace internal {
enum class CompareAction { EQ = 0, GE, GT, LE, LT, NE };
constexpr const char *CompareMessage[] = {
"equal to", "greater than or equal to",
"greater than", "less than or equal to",
"less than", "not equal to"};
template <typename T> struct Comparator {
CompareAction cmp;
T expected;
bool compare(T actual) {
switch (cmp) {
case CompareAction::EQ:
return actual == expected;
case CompareAction::NE:
return actual != expected;
case CompareAction::GE:
return actual >= expected;
case CompareAction::GT:
return actual > expected;
case CompareAction::LE:
return actual <= expected;
case CompareAction::LT:
return actual < expected;
}
__builtin_unreachable();
}
// The NVPTX backend cannot handle circular dependencies on global variables.
// We provide a constant dummy implementation to prevent this from occurring.
#ifdef LIBC_TARGET_ARCH_IS_NVPTX
constexpr const char *str() { return ""; }
#else
const char *str() { return CompareMessage[static_cast<int>(cmp)]; }
#endif
};
template <typename T> class ErrnoSetterMatcher : public Matcher<T> {
Comparator<T> return_cmp;
Comparator<int> errno_cmp;
T actual_return;
int actual_errno;
// Even though this is a errno matcher primarily, it has to cater to platforms
// which do not have an errno. This predicate checks if errno matching is to
// be skipped.
static constexpr bool ignore_errno() {
#ifdef LIBC_TARGET_ARCH_IS_GPU
return true;
#else
return false;
#endif
}
public:
ErrnoSetterMatcher(Comparator<T> rcmp) : return_cmp(rcmp) {}
ErrnoSetterMatcher(Comparator<T> rcmp, Comparator<int> ecmp)
: return_cmp(rcmp), errno_cmp(ecmp) {}
ErrnoSetterMatcher<T> with_errno(Comparator<int> ecmp) {
errno_cmp = ecmp;
return *this;
}
void explainError() override {
if (!return_cmp.compare(actual_return)) {
if constexpr (cpp::is_floating_point_v<T>) {
tlog << "Expected return value to be " << return_cmp.str() << ": "
<< str(fputil::FPBits<T>(return_cmp.expected)) << '\n'
<< " But got: "
<< str(fputil::FPBits<T>(actual_return)) << '\n';
} else {
tlog << "Expected return value to be " << return_cmp.str() << " "
<< return_cmp.expected << " but got " << actual_return << ".\n";
}
}
if constexpr (!ignore_errno()) {
if (!errno_cmp.compare(actual_errno)) {
tlog << "Expected errno to be " << errno_cmp.str() << " \""
<< get_error_string(errno_cmp.expected) << "\" but got \""
<< get_error_string(actual_errno) << "\".\n";
}
}
}
bool match(T got) {
actual_return = got;
actual_errno = LIBC_NAMESPACE::libc_errno;
LIBC_NAMESPACE::libc_errno = 0;
if constexpr (ignore_errno())
return return_cmp.compare(actual_return);
else
return return_cmp.compare(actual_return) &&
errno_cmp.compare(actual_errno);
}
};
} // namespace internal
namespace ErrnoSetterMatcher {
template <typename T> internal::Comparator<T> LT(T val) {
return internal::Comparator<T>{internal::CompareAction::LT, val};
}
template <typename T> internal::Comparator<T> LE(T val) {
return internal::Comparator<T>{internal::CompareAction::LE, val};
}
template <typename T> internal::Comparator<T> GT(T val) {
return internal::Comparator<T>{internal::CompareAction::GT, val};
}
template <typename T> internal::Comparator<T> GE(T val) {
return internal::Comparator<T>{internal::CompareAction::GE, val};
}
template <typename T> internal::Comparator<T> EQ(T val) {
return internal::Comparator<T>{internal::CompareAction::EQ, val};
}
template <typename T> internal::Comparator<T> NE(T val) {
return internal::Comparator<T>{internal::CompareAction::NE, val};
}
template <typename RetT = int>
static internal::ErrnoSetterMatcher<RetT> Succeeds(RetT ExpectedReturn = 0,
int ExpectedErrno = 0) {
return internal::ErrnoSetterMatcher<RetT>(EQ(ExpectedReturn),
EQ(ExpectedErrno));
}
template <typename RetT = int>
static internal::ErrnoSetterMatcher<RetT> Fails(int ExpectedErrno,
RetT ExpectedReturn = -1) {
return internal::ErrnoSetterMatcher<RetT>(EQ(ExpectedReturn),
EQ(ExpectedErrno));
}
template <typename RetT = int> class ErrnoSetterMatcherBuilder {
public:
template <typename T> using Cmp = internal::Comparator<T>;
ErrnoSetterMatcherBuilder(Cmp<RetT> cmp) : return_cmp(cmp) {}
internal::ErrnoSetterMatcher<RetT> with_errno(Cmp<int> cmp) {
return internal::ErrnoSetterMatcher<RetT>(return_cmp, cmp);
}
private:
Cmp<RetT> return_cmp;
};
template <typename RetT>
static ErrnoSetterMatcherBuilder<RetT> returns(internal::Comparator<RetT> cmp) {
return ErrnoSetterMatcherBuilder<RetT>(cmp);
}
} // namespace ErrnoSetterMatcher
} // namespace testing
} // namespace LIBC_NAMESPACE_DECL
#endif // LLVM_LIBC_TEST_ERRNOSETTERMATCHER_H
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