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//===-- Unittests for strtok_r -------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "src/string/strtok_r.h"
#include "test/UnitTest/Test.h"
TEST(LlvmLibcStrTokReentrantTest, NoTokenFound) {
{ // Empty source and delimiter string.
char empty[] = "";
char *reserve = nullptr;
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(empty, "", &reserve), nullptr);
// Another call to ensure that 'reserve' is not in a bad state.
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(empty, "", &reserve), nullptr);
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(nullptr, "", &reserve), nullptr);
}
{ // Empty source and single character delimiter string.
char empty[] = "";
char *reserve = nullptr;
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(empty, "_", &reserve), nullptr);
// Another call to ensure that 'reserve' is not in a bad state.
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(empty, "_", &reserve), nullptr);
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(nullptr, "_", &reserve), nullptr);
}
{ // Same character source and delimiter string.
char single[] = "_";
char *reserve = nullptr;
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(single, "_", &reserve), nullptr);
// Another call to ensure that 'reserve' is not in a bad state.
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(single, "_", &reserve), nullptr);
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(nullptr, "_", &reserve), nullptr);
}
{ // Multiple character source and single character delimiter string.
char multiple[] = "1,2";
char *reserve = nullptr;
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(multiple, ":", &reserve), "1,2");
// Another call to ensure that 'reserve' is not in a bad state.
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(multiple, ":", &reserve), "1,2");
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(nullptr, ":", &reserve), nullptr);
}
}
TEST(LlvmLibcStrTokReentrantTest, DelimiterAsFirstCharacterShouldBeIgnored) {
char src[] = ".123";
char *reserve = nullptr;
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(src, ".", &reserve), "123");
// Another call to ensure that 'reserve' is not in a bad state.
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(src, ".", &reserve), "123");
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(nullptr, ".", &reserve), nullptr);
}
TEST(LlvmLibcStrTokReentrantTest, DelimiterIsMiddleCharacter) {
char src[] = "12,34";
char *reserve = nullptr;
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(src, ",", &reserve), "12");
// Another call to ensure that 'reserve' is not in a bad state.
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(src, ",", &reserve), "12");
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(nullptr, ",", &reserve), nullptr);
}
TEST(LlvmLibcStrTokReentrantTest, DelimiterAsLastCharacterShouldBeIgnored) {
char src[] = "1234:";
char *reserve = nullptr;
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(src, ":", &reserve), "1234");
// Another call to ensure that 'reserve' is not in a bad state.
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(src, ":", &reserve), "1234");
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(nullptr, ":", &reserve), nullptr);
}
TEST(LlvmLibcStrTokReentrantTest, ShouldNotGoPastNullTerminator) {
char src[] = {'1', '2', '\0', ',', '3'};
char *reserve = nullptr;
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(src, ",", &reserve), "12");
// Another call to ensure that 'reserve' is not in a bad state.
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(src, ",", &reserve), "12");
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(nullptr, ",", &reserve), nullptr);
}
TEST(LlvmLibcStrTokReentrantTest,
ShouldReturnNullptrWhenBothSrcAndSaveptrAreNull) {
char *src = nullptr;
char *reserve = nullptr;
// Ensure that instead of crashing if src and reserve are null, nullptr is
// returned
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(src, ",", &reserve), nullptr);
// And that neither src nor reserve are changed when that happens
ASSERT_STREQ(src, nullptr);
ASSERT_STREQ(reserve, nullptr);
}
TEST(LlvmLibcStrTokReentrantTest,
SubsequentCallsShouldFindFollowingDelimiters) {
char src[] = "12,34.56";
char *reserve = nullptr;
char *token = LIBC_NAMESPACE::strtok_r(src, ",.", &reserve);
ASSERT_STREQ(token, "12");
token = LIBC_NAMESPACE::strtok_r(nullptr, ",.", &reserve);
ASSERT_STREQ(token, "34");
token = LIBC_NAMESPACE::strtok_r(nullptr, ",.", &reserve);
ASSERT_STREQ(token, "56");
token = LIBC_NAMESPACE::strtok_r(nullptr, "_:,_", &reserve);
ASSERT_STREQ(token, nullptr);
// Subsequent calls after hitting the end of the string should also return
// nullptr.
token = LIBC_NAMESPACE::strtok_r(nullptr, "_:,_", &reserve);
ASSERT_STREQ(token, nullptr);
}
TEST(LlvmLibcStrTokReentrantTest, DelimitersShouldNotBeIncludedInToken) {
char src[] = "__ab__:_cd__:__ef__:__";
char *reserve = nullptr;
char *token = LIBC_NAMESPACE::strtok_r(src, "_:", &reserve);
ASSERT_STREQ(token, "ab");
token = LIBC_NAMESPACE::strtok_r(nullptr, ":_", &reserve);
ASSERT_STREQ(token, "cd");
token = LIBC_NAMESPACE::strtok_r(nullptr, "_:,", &reserve);
ASSERT_STREQ(token, "ef");
token = LIBC_NAMESPACE::strtok_r(nullptr, "_:,_", &reserve);
ASSERT_STREQ(token, nullptr);
}
TEST(LlvmLibcStrTokReentrantTest, SubsequentSearchesReturnNull) {
char src[] = "a";
char *reserve = nullptr;
char *token = LIBC_NAMESPACE::strtok_r(src, ":", &reserve);
ASSERT_STREQ(token, "a");
ASSERT_EQ(LIBC_NAMESPACE::strtok_r(nullptr, ":", &reserve), nullptr);
ASSERT_EQ(LIBC_NAMESPACE::strtok_r(nullptr, ":", &reserve), nullptr);
}
TEST(LlvmLibcStrTokReentrantTest, TopBitSet) {
char top_bit_set_str[] = "hello\x80world";
char *p;
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(top_bit_set_str, "\x80", &p), "hello");
ASSERT_STREQ(LIBC_NAMESPACE::strtok_r(nullptr, "\x80", &p), "world");
ASSERT_EQ(LIBC_NAMESPACE::strtok_r(nullptr, "\x80", &p), nullptr);
}
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