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