// Copyright 2017 The Abseil Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Unit test for memutil.cc
#include "absl/strings/internal/memutil.h"
#include <cstdlib>
#include "gtest/gtest.h"
#include "absl/strings/ascii.h"
namespace {
static char* memcasechr(const char* s, int c, size_t slen) {
c = absl::ascii_tolower(c);
for (; slen; ++s, --slen) {
if (absl::ascii_tolower(*s) == c) return const_cast<char*>(s);
}
return nullptr;
}
static const char* memcasematch(const char* phaystack, size_t haylen,
const char* pneedle, size_t neelen) {
if (0 == neelen) {
return phaystack; // even if haylen is 0
}
if (haylen < neelen) return nullptr;
const char* match;
const char* hayend = phaystack + haylen - neelen + 1;
while ((match = static_cast<char*>(
memcasechr(phaystack, pneedle[0], hayend - phaystack)))) {
if (absl::strings_internal::memcasecmp(match, pneedle, neelen) == 0)
return match;
else
phaystack = match + 1;
}
return nullptr;
}
TEST(MemUtilTest, AllTests) {
// check memutil functions
char a[1000];
absl::strings_internal::memcat(a, 0, "hello", sizeof("hello") - 1);
absl::strings_internal::memcat(a, 5, " there", sizeof(" there") - 1);
EXPECT_EQ(absl::strings_internal::memcasecmp(a, "heLLO there",
sizeof("hello there") - 1),
0);
EXPECT_EQ(absl::strings_internal::memcasecmp(a, "heLLO therf",
sizeof("hello there") - 1),
-1);
EXPECT_EQ(absl::strings_internal::memcasecmp(a, "heLLO therf",
sizeof("hello there") - 2),
0);
EXPECT_EQ(absl::strings_internal::memcasecmp(a, "whatever", 0), 0);
char* p = absl::strings_internal::memdup("hello", 5);
free(p);
p = absl::strings_internal::memrchr("hello there", 'e',
sizeof("hello there") - 1);
EXPECT_TRUE(p && p[-1] == 'r');
p = absl::strings_internal::memrchr("hello there", 'e',
sizeof("hello there") - 2);
EXPECT_TRUE(p && p[-1] == 'h');
p = absl::strings_internal::memrchr("hello there", 'u',
sizeof("hello there") - 1);
EXPECT_TRUE(p == nullptr);
int len = absl::strings_internal::memspn("hello there",
sizeof("hello there") - 1, "hole");
EXPECT_EQ(len, sizeof("hello") - 1);
len = absl::strings_internal::memspn("hello there", sizeof("hello there") - 1,
"u");
EXPECT_EQ(len, 0);
len = absl::strings_internal::memspn("hello there", sizeof("hello there") - 1,
"");
EXPECT_EQ(len, 0);
len = absl::strings_internal::memspn("hello there", sizeof("hello there") - 1,
"trole h");
EXPECT_EQ(len, sizeof("hello there") - 1);
len = absl::strings_internal::memspn("hello there!",
sizeof("hello there!") - 1, "trole h");
EXPECT_EQ(len, sizeof("hello there") - 1);
len = absl::strings_internal::memspn("hello there!",
sizeof("hello there!") - 2, "trole h!");
EXPECT_EQ(len, sizeof("hello there!") - 2);
len = absl::strings_internal::memcspn("hello there",
sizeof("hello there") - 1, "leho");
EXPECT_EQ(len, 0);
len = absl::strings_internal::memcspn("hello there",
sizeof("hello there") - 1, "u");
EXPECT_EQ(len, sizeof("hello there") - 1);
len = absl::strings_internal::memcspn("hello there",
sizeof("hello there") - 1, "");
EXPECT_EQ(len, sizeof("hello there") - 1);
len = absl::strings_internal::memcspn("hello there",
sizeof("hello there") - 1, " ");
EXPECT_EQ(len, 5);
p = absl::strings_internal::mempbrk("hello there", sizeof("hello there") - 1,
"leho");
EXPECT_TRUE(p && p[1] == 'e' && p[2] == 'l');
p = absl::strings_internal::mempbrk("hello there", sizeof("hello there") - 1,
"nu");
EXPECT_TRUE(p == nullptr);
p = absl::strings_internal::mempbrk("hello there!",
sizeof("hello there!") - 2, "!");
EXPECT_TRUE(p == nullptr);
p = absl::strings_internal::mempbrk("hello there", sizeof("hello there") - 1,
" t ");
EXPECT_TRUE(p && p[-1] == 'o' && p[1] == 't');
{
const char kHaystack[] = "0123456789";
EXPECT_EQ(absl::strings_internal::memmem(kHaystack, 0, "", 0), kHaystack);
EXPECT_EQ(absl::strings_internal::memmem(kHaystack, 10, "012", 3),
kHaystack);
EXPECT_EQ(absl::strings_internal::memmem(kHaystack, 10, "0xx", 1),
kHaystack);
EXPECT_EQ(absl::strings_internal::memmem(kHaystack, 10, "789", 3),
kHaystack + 7);
EXPECT_EQ(absl::strings_internal::memmem(kHaystack, 10, "9xx", 1),
kHaystack + 9);
EXPECT_TRUE(absl::strings_internal::memmem(kHaystack, 10, "9xx", 3) ==
nullptr);
EXPECT_TRUE(absl::strings_internal::memmem(kHaystack, 10, "xxx", 1) ==
nullptr);
}
{
const char kHaystack[] = "aBcDeFgHiJ";
EXPECT_EQ(absl::strings_internal::memcasemem(kHaystack, 0, "", 0),
kHaystack);
EXPECT_EQ(absl::strings_internal::memcasemem(kHaystack, 10, "Abc", 3),
kHaystack);
EXPECT_EQ(absl::strings_internal::memcasemem(kHaystack, 10, "Axx", 1),
kHaystack);
EXPECT_EQ(absl::strings_internal::memcasemem(kHaystack, 10, "hIj", 3),
kHaystack + 7);
EXPECT_EQ(absl::strings_internal::memcasemem(kHaystack, 10, "jxx", 1),
kHaystack + 9);
EXPECT_TRUE(absl::strings_internal::memcasemem(kHaystack, 10, "jxx", 3) ==
nullptr);
EXPECT_TRUE(absl::strings_internal::memcasemem(kHaystack, 10, "xxx", 1) ==
nullptr);
}
{
const char kHaystack[] = "0123456789";
EXPECT_EQ(absl::strings_internal::memmatch(kHaystack, 0, "", 0), kHaystack);
EXPECT_EQ(absl::strings_internal::memmatch(kHaystack, 10, "012", 3),
kHaystack);
EXPECT_EQ(absl::strings_internal::memmatch(kHaystack, 10, "0xx", 1),
kHaystack);
EXPECT_EQ(absl::strings_internal::memmatch(kHaystack, 10, "789", 3),
kHaystack + 7);
EXPECT_EQ(absl::strings_internal::memmatch(kHaystack, 10, "9xx", 1),
kHaystack + 9);
EXPECT_TRUE(absl::strings_internal::memmatch(kHaystack, 10, "9xx", 3) ==
nullptr);
EXPECT_TRUE(absl::strings_internal::memmatch(kHaystack, 10, "xxx", 1) ==
nullptr);
}
}
} // namespace
