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serenity/Libraries/LibRegex/Tests/RegexLibC.cpp
Emanuel Sprung 55450055d8 LibRegex: Add a regular expression library 
This commit is a mix of several commits, squashed into one because the
commits before 'Move regex to own Library and fix all the broken stuff'
were not fixable in any elegant way.
The commits are listed below for "historical" purposes:

- AK: Add options/flags and Errors for regular expressions

Flags can be provided for any possible flavour by adding a new scoped enum.
Handling of flags is done by templated Options class and the overloaded
'|' and '&' operators.

- AK: Add Lexer for regular expressions

The lexer parses the input and extracts tokens needed to parse a regular
expression.

- AK: Add regex Parser and PosixExtendedParser

This patchset adds a abstract parser class that can be derived to implement
different parsers. A parser produces bytecode to be executed within the
regex matcher.

- AK: Add regex matcher

This patchset adds an regex matcher based on the principles of the T-REX VM.
The bytecode pruduced by the respective Parser is put into the matcher and
the VM will recursively execute the bytecode according to the available OpCodes.
Possible improvement: the recursion could be replaced by multi threading capabilities.

To match a Regular expression, e.g. for the Posix standard regular expression matcher
use the following API:

```
Pattern<PosixExtendedParser> pattern("^.*$");
auto result = pattern.match("Well, hello friends!\nHello World!"); // Match whole needle

EXPECT(result.count == 1);
EXPECT(result.matches.at(0).view.starts_with("Well"));
EXPECT(result.matches.at(0).view.end() == "!");

result = pattern.match("Well, hello friends!\nHello World!", PosixFlags::Multiline); // Match line by line

EXPECT(result.count == 2);
EXPECT(result.matches.at(0).view == "Well, hello friends!");
EXPECT(result.matches.at(1).view == "Hello World!");

EXPECT(pattern.has_match("Well,....")); // Just check if match without a result, which saves some resources.
```

- AK: Rework regex to work with opcodes objects

This patchsets reworks the matcher to work on a more structured base.
For that an abstract OpCode class and derived classes for the specific
OpCodes have been added. The respective opcode logic is contained in
each respective execute() method.

- AK: Add benchmark for regex

- AK: Some optimization in regex for runtime and memory

- LibRegex: Move regex to own Library and fix all the broken stuff

Now regex works again and grep utility is also in place for testing.
This commit also fixes the use of regex.h in C by making `regex_t`
an opaque (-ish) type, which makes its behaviour consistent between
C and C++ compilers.
Previously, <regex.h> would've blown C compilers up, and even if it
didn't, would've caused a leak in C code, and not in C++ code (due to
the existence of `OwnPtr` inside the struct).

To make this whole ordeal easier to deal with (for now), this pulls the
definitions of `reg*()` into LibRegex.

pros:
- The circular dependency between LibC and LibRegex is broken
- Eaiser to test (without accidentally pulling in the host's libc!)

cons:
- Using any of the regex.h functions will require the user to link -lregex
- The symbols will be missing from libc, which will be a big surprise
  down the line (especially with shared libs).

Co-Authored-By: Ali Mohammad Pur <ali.mpfard@gmail.com>
2020-11-27 21:32:41 +01:00

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/*
* Copyright (c) 2020, Emanuel Sprung <emanuel.sprung@gmail.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/TestSuite.h>
#include <AK/StringBuilder.h>
#include <LibC/regex.h>
#include <stdio.h>
#define BENCHMARK_LOOP_ITERATIONS 100000
#define DISABLE_REGEX_BENCHMARK
//#if not(defined(REGEX_DEBUG) || defined(REGEX_MATCH_STATUS) || defined(DISABLE_REGEX_BENCHMARK))
# include <regex>
//#endif
TEST_CASE(catch_all)
{
String pattern = "^.*$";
regex_t regex;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
EXPECT_EQ(regexec(&regex, "Hello World", 0, NULL, 0), REG_NOERR);
regfree(&regex);
}
TEST_CASE(simple_start)
{
String pattern = "^hello friends";
regex_t regex;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
EXPECT_EQ(regexec(&regex, "Hello!", 0, NULL, 0), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "hello friends", 0, NULL, 0), REG_NOERR);
EXPECT_EQ(regexec(&regex, "Well, hello friends", 0, NULL, 0), REG_NOMATCH);
regfree(&regex);
}
TEST_CASE(simple_end)
{
String pattern = ".*hello\\.\\.\\. there$";
regex_t regex;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
EXPECT_EQ(regexec(&regex, "Hallo", 0, NULL, 0), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "I said fyhello... there", 0, NULL, 0), REG_NOERR);
EXPECT_EQ(regexec(&regex, "ahello... therea", 0, NULL, 0), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "hello.. there", 0, NULL, 0), REG_NOMATCH);
regfree(&regex);
}
TEST_CASE(simple_period)
{
String pattern = "hello.";
regex_t regex;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
EXPECT_EQ(regexec(&regex, "Hello1", 0, NULL, 0), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "hello1", 0, NULL, 0), REG_NOERR);
EXPECT_EQ(regexec(&regex, "hello2", 0, NULL, 0), REG_NOERR);
EXPECT_EQ(regexec(&regex, "hello?", 0, NULL, 0), REG_NOERR);
regfree(&regex);
}
TEST_CASE(simple_period_end)
{
String pattern = "hello.$";
regex_t regex;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED | REG_NOSUB), REG_NOERR);
EXPECT_EQ(regexec(&regex, "Hello1", 0, NULL, REG_NOSUB), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "hello1hello1", 0, NULL, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(regexec(&regex, "hello2hell", 0, NULL, REG_GLOBAL), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "hello?", 0, NULL, REG_NOSUB), REG_NOERR);
regfree(&regex);
}
TEST_CASE(simple_escaped)
{
String pattern = "hello\\.";
regex_t regex;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
EXPECT_EQ(regexec(&regex, "hello", 0, NULL, 0), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "hello.", 0, NULL, 0), REG_NOERR);
regfree(&regex);
}
TEST_CASE(simple_period2_end)
{
String pattern = ".*hi... there$";
regex_t regex;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
EXPECT_EQ(regexec(&regex, "Hello there", 0, NULL, REG_GLOBAL), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "I said fyhi... there", 0, NULL, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(regexec(&regex, "....hi... ", 0, NULL, REG_GLOBAL), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "I said fyhihii there", 0, NULL, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(regexec(&regex, "I said fyhihi there", 0, NULL, REG_GLOBAL), REG_NOMATCH);
regfree(&regex);
}
TEST_CASE(simple_plus)
{
String pattern = "a+";
regex_t regex;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED | REG_NOSUB), REG_NOERR);
EXPECT_EQ(regexec(&regex, "b", 0, NULL, REG_NOSUB), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "a", 0, NULL, REG_NOSUB), REG_NOERR);
EXPECT_EQ(regexec(&regex, "aaaaaabbbbb", 0, NULL, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(regexec(&regex, "aaaaaaaaaaa", 0, NULL, REG_GLOBAL), REG_NOERR);
regfree(&regex);
}
TEST_CASE(simple_questionmark)
{
String pattern = "da?d";
regex_t regex;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
EXPECT_EQ(regexec(&regex, "a", 0, NULL, REG_GLOBAL), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "daa", 0, NULL, REG_GLOBAL), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "ddddd", 0, NULL, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(regexec(&regex, "dd", 0, NULL, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(regexec(&regex, "dad", 0, NULL, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(regexec(&regex, "dada", 0, NULL, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(regexec(&regex, "adadaa", 0, NULL, REG_GLOBAL), REG_NOERR);
regfree(&regex);
}
TEST_CASE(simple_questionmark_matchall)
{
String pattern = "da?d";
regex_t regex;
static constexpr int num_matches { 5 };
regmatch_t matches[num_matches];
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
EXPECT_EQ(regexec(&regex, "a", num_matches, matches, REG_GLOBAL), REG_NOMATCH);
EXPECT_EQ(matches[0].rm_cnt, 0u);
EXPECT_EQ(regexec(&regex, "daa", num_matches, matches, REG_GLOBAL), REG_NOMATCH);
EXPECT_EQ(matches[0].rm_cnt, 0u);
EXPECT_EQ(regexec(&regex, "ddddd", num_matches, matches, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 2u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 2u);
EXPECT_EQ(matches[1].rm_so, 2u);
EXPECT_EQ(matches[1].rm_eo, 4u);
EXPECT_EQ(regexec(&regex, "dd", num_matches, matches, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(regexec(&regex, "dad", num_matches, matches, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(regexec(&regex, "dada", num_matches, matches, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(regexec(&regex, "adadaa", num_matches, matches, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
regfree(&regex);
}
TEST_CASE(character_class)
{
String pattern = "[[:alpha:]]";
regex_t regex;
static constexpr int num_matches { 5 };
regmatch_t matches[num_matches];
String haystack = "[Window]\nOpacity=255\nAudibleBeep=0\n";
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
EXPECT_EQ(regexec(&regex, haystack.characters(), num_matches, matches, 0), REG_NOMATCH);
EXPECT_EQ(matches[0].rm_cnt, 0u);
EXPECT_EQ(regexec(&regex, haystack.characters(), num_matches, matches, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 24u);
EXPECT_EQ(haystack.substring_view(matches[0].rm_so, matches[0].rm_eo - matches[0].rm_so), "W");
EXPECT_EQ(haystack.substring_view(matches[1].rm_so, matches[1].rm_eo - matches[1].rm_so), "i");
regfree(&regex);
}
TEST_CASE(character_class2)
{
String pattern = "[[:alpha:]]*=([[:digit:]]*)|\\[(.*)\\]";
regex_t regex;
static constexpr int num_matches { 9 };
regmatch_t matches[num_matches];
String haystack = "[Window]\nOpacity=255\nAudibleBeep=0\n";
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED | REG_NEWLINE), REG_NOERR);
EXPECT_EQ(regexec(&regex, haystack.characters(), num_matches, matches, 0), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 3u);
#if 0
for (int i = 0; i < num_matches; ++i) {
fprintf(stderr, "Matches[%i].rm_so: %li, .rm_eo: %li .rm_cnt: %li: ", i, matches[i].rm_so, matches[i].rm_eo, matches[i].rm_cnt);
fprintf(stderr, "haystack length: %lu\n", haystack.length());
if (matches[i].rm_so != -1)
fprintf(stderr, "%s\n", haystack.substring_view(matches[i].rm_so, matches[i].rm_eo - matches[i].rm_so).to_string().characters());
}
#endif
EXPECT_EQ(haystack.substring_view(matches[0].rm_so, matches[0].rm_eo - matches[0].rm_so), "[Window]");
EXPECT_EQ(matches[1].rm_so, -1);
EXPECT_EQ(matches[1].rm_eo, -1);
EXPECT_EQ(matches[1].rm_cnt, 0);
EXPECT_EQ(haystack.substring_view(matches[2].rm_so, matches[2].rm_eo - matches[2].rm_so), "Window");
EXPECT_EQ(haystack.substring_view(matches[3].rm_so, matches[3].rm_eo - matches[3].rm_so), "Opacity=255");
EXPECT_EQ(haystack.substring_view(matches[4].rm_so, matches[4].rm_eo - matches[4].rm_so), "255");
EXPECT_EQ(matches[5].rm_so, -1);
EXPECT_EQ(matches[5].rm_eo, -1);
EXPECT_EQ(matches[5].rm_cnt, 0);
EXPECT_EQ(haystack.substring_view(matches[6].rm_so, matches[6].rm_eo - matches[6].rm_so), "AudibleBeep=0");
EXPECT_EQ(haystack.substring_view(matches[7].rm_so, matches[7].rm_eo - matches[7].rm_so), "0");
EXPECT_EQ(matches[8].rm_so, -1);
EXPECT_EQ(matches[8].rm_eo, -1);
EXPECT_EQ(matches[8].rm_cnt, 0);
regfree(&regex);
}
TEST_CASE(escaped_char_questionmark)
{
String pattern = "This\\.?And\\.?That";
regex_t regex;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
EXPECT_EQ(regexec(&regex, "ThisAndThat", 0, NULL, 0), REG_NOERR);
EXPECT_EQ(regexec(&regex, "This.And.That", 0, NULL, 0), REG_NOERR);
EXPECT_EQ(regexec(&regex, "This And That", 0, NULL, 0), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "This..And..That", 0, NULL, 0), REG_NOMATCH);
regfree(&regex);
}
TEST_CASE(char_qualifier_asterisk)
{
String pattern = "regex*";
regex_t regex;
static constexpr int num_matches { 5 };
regmatch_t matches[num_matches];
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
EXPECT_EQ(regexec(&regex, "#include <regex.h>", num_matches, matches, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
regfree(&regex);
}
TEST_CASE(char_utf8)
{
String pattern = "😀";
regex_t regex;
static constexpr int num_matches { 5 };
regmatch_t matches[num_matches];
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
EXPECT_EQ(regexec(&regex, "Привет, мир! 😀 γειά σου κόσμος 😀 こんにちは世界", num_matches, matches, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 2u);
regfree(&regex);
}
TEST_CASE(parens)
{
String pattern = "test(hello)test";
regex_t regex;
static constexpr int num_matches { 5 };
regmatch_t matches[num_matches];
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
EXPECT_EQ(regexec(&regex, "testhellotest", num_matches, matches, 0), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 13u);
EXPECT_EQ(matches[1].rm_so, 4u);
EXPECT_EQ(matches[1].rm_eo, 9u);
regfree(&regex);
}
TEST_CASE(parser_error_parens)
{
String pattern = "test()test";
regex_t regex;
static constexpr int num_matches { 5 };
regmatch_t matches[num_matches];
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_EMPTY_EXPR);
EXPECT_EQ(regexec(&regex, "testhellotest", num_matches, matches, 0), REG_EMPTY_EXPR);
regfree(&regex);
}
TEST_CASE(parser_error_special_characters_used_at_wrong_place)
{
String pattern;
regex_t regex;
static constexpr int num_matches { 5 };
regmatch_t matches[num_matches];
Vector<char, 4> chars = { '*', '+', '?', '}' };
StringBuilder b;
for (auto& ch : chars) {
auto error_code_to_check = ch == '}' ? REG_EBRACE : REG_BADRPT;
// First in ere
b.clear();
b.append(ch);
pattern = b.build();
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), error_code_to_check);
EXPECT_EQ(regexec(&regex, "test", num_matches, matches, 0), error_code_to_check);
// After vertical line
b.clear();
b.append("a|");
b.append(ch);
pattern = b.build();
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), error_code_to_check);
EXPECT_EQ(regexec(&regex, "test", num_matches, matches, 0), error_code_to_check);
// After circumflex
b.clear();
b.append("^");
b.append(ch);
pattern = b.build();
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), error_code_to_check);
EXPECT_EQ(regexec(&regex, "test", num_matches, matches, 0), error_code_to_check);
// After dollar
b.clear();
b.append("$");
b.append(ch);
pattern = b.build();
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), error_code_to_check);
EXPECT_EQ(regexec(&regex, "test", num_matches, matches, 0), error_code_to_check);
// After left parens
b.clear();
b.append("(");
b.append(ch);
b.append(")");
pattern = b.build();
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), error_code_to_check);
EXPECT_EQ(regexec(&regex, "test", num_matches, matches, 0), error_code_to_check);
}
regfree(&regex);
}
TEST_CASE(parser_error_vertical_line_used_at_wrong_place)
{
String pattern;
regex_t regex;
static constexpr int num_matches { 5 };
regmatch_t matches[num_matches];
// First in ere
pattern = "|asdf";
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_EMPTY_EXPR);
EXPECT_EQ(regexec(&regex, "test", num_matches, matches, 0), REG_EMPTY_EXPR);
// Last in ere
pattern = "asdf|";
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_EMPTY_EXPR);
EXPECT_EQ(regexec(&regex, "test", num_matches, matches, 0), REG_EMPTY_EXPR);
// After left parens
pattern = "(|asdf)";
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_EMPTY_EXPR);
EXPECT_EQ(regexec(&regex, "test", num_matches, matches, 0), REG_EMPTY_EXPR);
// Proceed right parens
pattern = "(asdf)|";
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_EMPTY_EXPR);
EXPECT_EQ(regexec(&regex, "test", num_matches, matches, 0), REG_EMPTY_EXPR);
regfree(&regex);
}
TEST_CASE(parens_qualifier_questionmark)
{
String pattern = "test(hello)?test";
regex_t regex;
static constexpr int num_matches { 5 };
regmatch_t matches[num_matches];
const char* match_str;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
match_str = "testtest";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 8u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testtest");
match_str = "testhellotest";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 13u);
EXPECT_EQ(matches[1].rm_so, 4u);
EXPECT_EQ(matches[1].rm_eo, 9u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testhellotest");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
regfree(&regex);
}
TEST_CASE(parens_qualifier_asterisk)
{
String pattern = "test(hello)*test";
regex_t regex;
static constexpr int num_matches { 6 };
regmatch_t matches[num_matches];
const char* match_str;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
match_str = "testtest";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 8u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testtest");
match_str = "testhellohellotest";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 18u);
EXPECT_EQ(matches[1].rm_so, 9u);
EXPECT_EQ(matches[1].rm_eo, 14u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testhellohellotest");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
match_str = "testhellohellotest, testhellotest";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 2u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 18u);
EXPECT_EQ(matches[1].rm_so, 9u);
EXPECT_EQ(matches[1].rm_eo, 14u);
EXPECT_EQ(matches[2].rm_so, 20u);
EXPECT_EQ(matches[2].rm_eo, 33u);
EXPECT_EQ(matches[3].rm_so, 24u);
EXPECT_EQ(matches[3].rm_eo, 29u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testhellohellotest");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
EXPECT_EQ(StringView(&match_str[matches[2].rm_so], matches[2].rm_eo - matches[2].rm_so), "testhellotest");
EXPECT_EQ(StringView(&match_str[matches[3].rm_so], matches[3].rm_eo - matches[3].rm_so), "hello");
regfree(&regex);
}
TEST_CASE(parens_qualifier_asterisk_2)
{
String pattern = "test(.*)test";
regex_t regex;
static constexpr int num_matches { 6 };
regmatch_t matches[num_matches];
const char* match_str;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
match_str = "testasdftest";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 12u);
EXPECT_EQ(matches[1].rm_so, 4u);
EXPECT_EQ(matches[1].rm_eo, 8u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testasdftest");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "asdf");
match_str = "testasdfasdftest";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 16u);
EXPECT_EQ(matches[1].rm_so, 4u);
EXPECT_EQ(matches[1].rm_eo, 12u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testasdfasdftest");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "asdfasdf");
match_str = "testaaaatest, testbbbtest, testtest";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 35u);
EXPECT_EQ(matches[1].rm_so, 4u);
EXPECT_EQ(matches[1].rm_eo, 31u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testaaaatest, testbbbtest, testtest");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "aaaatest, testbbbtest, test");
regfree(&regex);
}
TEST_CASE(mulit_parens_qualifier_too_less_result_values)
{
String pattern = "test(a)?(b)?(c)?test";
regex_t regex;
static constexpr int num_matches { 4 };
regmatch_t matches[num_matches];
const char* match_str;
matches[3] = { -2, -2, 100 };
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
match_str = "testabtest";
EXPECT_EQ(regexec(&regex, match_str, num_matches - 1, matches, 0), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 10u);
EXPECT_EQ(matches[1].rm_so, 4u);
EXPECT_EQ(matches[1].rm_eo, 5u);
EXPECT_EQ(matches[2].rm_so, 5u);
EXPECT_EQ(matches[2].rm_eo, 6u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testabtest");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "a");
EXPECT_EQ(StringView(&match_str[matches[2].rm_so], matches[2].rm_eo - matches[2].rm_so), "b");
EXPECT_EQ(matches[3].rm_so, -2);
EXPECT_EQ(matches[3].rm_eo, -2);
EXPECT_EQ(matches[3].rm_cnt, 100u);
match_str = "testabctest";
EXPECT_EQ(regexec(&regex, match_str, num_matches - 1, matches, 0), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 11u);
EXPECT_EQ(matches[1].rm_so, 4u);
EXPECT_EQ(matches[1].rm_eo, 5u);
EXPECT_EQ(matches[2].rm_so, 5u);
EXPECT_EQ(matches[2].rm_eo, 6u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testabctest");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "a");
EXPECT_EQ(StringView(&match_str[matches[2].rm_so], matches[2].rm_eo - matches[2].rm_so), "b");
EXPECT_EQ(matches[3].rm_so, -2);
EXPECT_EQ(matches[3].rm_eo, -2);
EXPECT_EQ(matches[3].rm_cnt, 100u);
match_str = "testabctest, testabctest";
EXPECT_EQ(regexec(&regex, match_str, num_matches - 1, matches, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 2u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 11u);
EXPECT_EQ(matches[1].rm_so, 4u);
EXPECT_EQ(matches[1].rm_eo, 5u);
EXPECT_EQ(matches[2].rm_so, 5u);
EXPECT_EQ(matches[2].rm_eo, 6u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testabctest");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "a");
EXPECT_EQ(StringView(&match_str[matches[2].rm_so], matches[2].rm_eo - matches[2].rm_so), "b");
EXPECT_EQ(matches[3].rm_so, -2);
EXPECT_EQ(matches[3].rm_eo, -2);
EXPECT_EQ(matches[3].rm_cnt, 100u);
regfree(&regex);
}
TEST_CASE(multi_parens_qualifier_questionmark)
{
String pattern = "test(a)?(b)?(c)?test";
regex_t regex;
static constexpr int num_matches { 8 };
regmatch_t matches[num_matches];
const char* match_str;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
match_str = "testtest";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 8u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testtest");
match_str = "testabctest";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 11u);
EXPECT_EQ(matches[1].rm_so, 4u);
EXPECT_EQ(matches[1].rm_eo, 5u);
EXPECT_EQ(matches[2].rm_so, 5u);
EXPECT_EQ(matches[2].rm_eo, 6u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testabctest");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "a");
EXPECT_EQ(StringView(&match_str[matches[2].rm_so], matches[2].rm_eo - matches[2].rm_so), "b");
match_str = "testabctest, testactest";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 2u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 11u);
EXPECT_EQ(matches[1].rm_so, 4u);
EXPECT_EQ(matches[1].rm_eo, 5u);
EXPECT_EQ(matches[2].rm_so, 5u);
EXPECT_EQ(matches[2].rm_eo, 6u);
EXPECT_EQ(matches[3].rm_so, 6u);
EXPECT_EQ(matches[3].rm_eo, 7u);
EXPECT_EQ(matches[4].rm_so, 13u);
EXPECT_EQ(matches[4].rm_eo, 23u);
EXPECT_EQ(matches[5].rm_so, 17u);
EXPECT_EQ(matches[5].rm_eo, 18u);
EXPECT_EQ(matches[6].rm_so, -1);
EXPECT_EQ(matches[6].rm_eo, -1);
EXPECT_EQ(matches[7].rm_so, 18u);
EXPECT_EQ(matches[7].rm_eo, 19u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testabctest");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "a");
EXPECT_EQ(StringView(&match_str[matches[2].rm_so], matches[2].rm_eo - matches[2].rm_so), "b");
EXPECT_EQ(StringView(&match_str[matches[3].rm_so], matches[3].rm_eo - matches[3].rm_so), "c");
EXPECT_EQ(StringView(&match_str[matches[4].rm_so], matches[4].rm_eo - matches[4].rm_so), "testactest");
EXPECT_EQ(StringView(&match_str[matches[5].rm_so], matches[5].rm_eo - matches[5].rm_so), "a");
EXPECT_EQ(StringView(&match_str[matches[6].rm_so], matches[6].rm_eo - matches[6].rm_so), "");
EXPECT_EQ(StringView(&match_str[matches[7].rm_so], matches[7].rm_eo - matches[7].rm_so), "c");
regfree(&regex);
}
TEST_CASE(simple_alternative)
{
String pattern = "test|hello|friends";
regex_t regex;
static constexpr int num_matches { 1 };
regmatch_t matches[num_matches];
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
EXPECT_EQ(regexec(&regex, "test", num_matches, matches, 0), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 4u);
EXPECT_EQ(regexec(&regex, "hello", num_matches, matches, 0), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 5u);
EXPECT_EQ(regexec(&regex, "friends", num_matches, matches, 0), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 7u);
regfree(&regex);
}
TEST_CASE(alternative_match_groups)
{
String pattern = "test(a)?(b)?|hello ?(dear|my)? friends";
regex_t regex;
static constexpr int num_matches { 8 };
regmatch_t matches[num_matches];
const char* match_str;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
match_str = "test";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0);
EXPECT_EQ(matches[0].rm_eo, 4);
EXPECT_EQ(matches[1].rm_so, -1);
EXPECT_EQ(matches[1].rm_eo, -1);
EXPECT_EQ(matches[2].rm_so, -1);
EXPECT_EQ(matches[2].rm_eo, -1);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "test");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "");
EXPECT_EQ(StringView(&match_str[matches[2].rm_so], matches[2].rm_eo - matches[2].rm_so), "");
match_str = "testa";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 5u);
EXPECT_EQ(matches[1].rm_so, 4u);
EXPECT_EQ(matches[1].rm_eo, 5u);
EXPECT_EQ(matches[2].rm_so, -1);
EXPECT_EQ(matches[2].rm_eo, -1);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testa");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "a");
EXPECT_EQ(StringView(&match_str[matches[2].rm_so], matches[2].rm_eo - matches[2].rm_so), "");
match_str = "testb";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 5u);
EXPECT_EQ(matches[1].rm_so, -1);
EXPECT_EQ(matches[1].rm_eo, -1);
EXPECT_EQ(matches[2].rm_so, 4u);
EXPECT_EQ(matches[2].rm_eo, 5u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testb");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "");
EXPECT_EQ(StringView(&match_str[matches[2].rm_so], matches[2].rm_eo - matches[2].rm_so), "b");
match_str = "hello friends";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 13u);
EXPECT_EQ(matches[1].rm_so, -1);
EXPECT_EQ(matches[1].rm_eo, -1);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hello friends");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "");
match_str = "hello dear friends";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 18u);
EXPECT_EQ(matches[1].rm_so, -1);
EXPECT_EQ(matches[1].rm_eo, -1);
EXPECT_EQ(matches[2].rm_so, -1);
EXPECT_EQ(matches[2].rm_eo, -1);
EXPECT_EQ(matches[3].rm_so, 6);
EXPECT_EQ(matches[3].rm_eo, 10);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hello dear friends");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "");
EXPECT_EQ(StringView(&match_str[matches[2].rm_so], matches[2].rm_eo - matches[2].rm_so), "");
EXPECT_EQ(StringView(&match_str[matches[3].rm_so], matches[3].rm_eo - matches[3].rm_so), "dear");
match_str = "hello my friends";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 16u);
EXPECT_EQ(matches[1].rm_so, -1);
EXPECT_EQ(matches[1].rm_eo, -1);
EXPECT_EQ(matches[2].rm_so, -1);
EXPECT_EQ(matches[2].rm_eo, -1);
EXPECT_EQ(matches[3].rm_so, 6);
EXPECT_EQ(matches[3].rm_eo, 8);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hello my friends");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "");
EXPECT_EQ(StringView(&match_str[matches[2].rm_so], matches[2].rm_eo - matches[2].rm_so), "");
EXPECT_EQ(StringView(&match_str[matches[3].rm_so], matches[3].rm_eo - matches[3].rm_so), "my");
match_str = "testabc";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOMATCH);
EXPECT_EQ(matches[0].rm_cnt, 0u);
EXPECT_EQ(matches[0].rm_so, -1);
EXPECT_EQ(matches[0].rm_eo, -1);
match_str = "hello test friends";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOMATCH);
EXPECT_EQ(matches[0].rm_cnt, 0u);
EXPECT_EQ(matches[0].rm_so, -1);
EXPECT_EQ(matches[0].rm_eo, -1);
regfree(&regex);
}
TEST_CASE(parens_qualifier_exact)
{
String pattern = "(hello){3}";
regex_t regex;
static constexpr int num_matches { 5 };
regmatch_t matches[num_matches];
const char* match_str;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
match_str = "hello";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOMATCH);
EXPECT_EQ(matches[0].rm_cnt, 0u);
match_str = "hellohellohello";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 15u);
EXPECT_EQ(matches[1].rm_so, 10u);
EXPECT_EQ(matches[1].rm_eo, 15u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hellohellohello");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
match_str = "hellohellohellohello";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 15u);
EXPECT_EQ(matches[1].rm_so, 10u);
EXPECT_EQ(matches[1].rm_eo, 15u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hellohellohello");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
match_str = "test hellohellohello";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 5u);
EXPECT_EQ(matches[0].rm_eo, 20u);
EXPECT_EQ(matches[1].rm_so, 15u);
EXPECT_EQ(matches[1].rm_eo, 20u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hellohellohello");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
regfree(&regex);
}
TEST_CASE(parens_qualifier_minimum)
{
String pattern = "(hello){3,}";
regex_t regex;
static constexpr int num_matches { 5 };
regmatch_t matches[num_matches];
const char* match_str;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
match_str = "hello";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOMATCH);
EXPECT_EQ(matches[0].rm_cnt, 0u);
match_str = "hellohellohello";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 15u);
EXPECT_EQ(matches[1].rm_so, 10u);
EXPECT_EQ(matches[1].rm_eo, 15u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hellohellohello");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
match_str = "hellohellohellohello";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, REG_SEARCH), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 20u);
EXPECT_EQ(matches[1].rm_so, 15u);
EXPECT_EQ(matches[1].rm_eo, 20u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hellohellohellohello");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
match_str = "test hellohellohello";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 5u);
EXPECT_EQ(matches[0].rm_eo, 20u);
EXPECT_EQ(matches[1].rm_so, 15u);
EXPECT_EQ(matches[1].rm_eo, 20u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hellohellohello");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
match_str = "test hellohellohellohello";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 5u);
EXPECT_EQ(matches[0].rm_eo, 25u);
EXPECT_EQ(matches[1].rm_so, 20u);
EXPECT_EQ(matches[1].rm_eo, 25u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hellohellohellohello");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
regfree(&regex);
}
TEST_CASE(parens_qualifier_maximum)
{
String pattern = "(hello){2,3}";
regex_t regex;
static constexpr int num_matches { 5 };
regmatch_t matches[num_matches];
const char* match_str;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
match_str = "hello";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOMATCH);
EXPECT_EQ(matches[0].rm_cnt, 0u);
match_str = "hellohellohello";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 15u);
EXPECT_EQ(matches[1].rm_so, 10u);
EXPECT_EQ(matches[1].rm_eo, 15u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hellohellohello");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
match_str = "hellohellohellohello";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 0u);
EXPECT_EQ(matches[0].rm_eo, 15u);
EXPECT_EQ(matches[1].rm_so, 10u);
EXPECT_EQ(matches[1].rm_eo, 15u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hellohellohello");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
match_str = "test hellohellohello";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 5u);
EXPECT_EQ(matches[0].rm_eo, 20u);
EXPECT_EQ(matches[1].rm_so, 15u);
EXPECT_EQ(matches[1].rm_eo, 20u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hellohellohello");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
match_str = "test hellohellohellohello";
EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(matches[0].rm_so, 5u);
EXPECT_EQ(matches[0].rm_eo, 20u);
EXPECT_EQ(matches[1].rm_so, 15u);
EXPECT_EQ(matches[1].rm_eo, 20u);
EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hellohellohello");
EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
regfree(&regex);
}
TEST_CASE(char_qualifier_min_max)
{
String pattern = "c{3,30}";
regex_t regex;
static constexpr int num_matches { 5 };
regmatch_t matches[num_matches];
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
EXPECT_EQ(regexec(&regex, "cc", num_matches, matches, 0), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "ccc", num_matches, matches, 0), REG_NOERR);
EXPECT_EQ(regexec(&regex, "cccccccccccccccccccccccccccccc", num_matches, matches, 0), REG_NOERR);
EXPECT_EQ(matches[0].rm_cnt, 1u);
EXPECT_EQ(regexec(&regex, "ccccccccccccccccccccccccccccccc", num_matches, matches, 0), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "ccccccccccccccccccccccccccccccc", num_matches, matches, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(regexec(&regex, "cccccccccccccccccccccccccccccccc", num_matches, matches, 0), REG_NOMATCH);
regfree(&regex);
}
TEST_CASE(simple_bracket_chars)
{
String pattern = "[abc]";
regex_t regex;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
EXPECT_EQ(regexec(&regex, "a", 0, NULL, 0), REG_NOERR);
EXPECT_EQ(regexec(&regex, "b", 0, NULL, 0), REG_NOERR);
EXPECT_EQ(regexec(&regex, "c", 0, NULL, 0), REG_NOERR);
EXPECT_EQ(regexec(&regex, "d", 0, NULL, 0), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "e", 0, NULL, 0), REG_NOMATCH);
}
TEST_CASE(simple_bracket_chars_inverse)
{
String pattern = "[^abc]";
regex_t regex;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
EXPECT_EQ(regexec(&regex, "a", 0, NULL, 0), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "b", 0, NULL, 0), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "c", 0, NULL, 0), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "d", 0, NULL, 0), REG_NOERR);
EXPECT_EQ(regexec(&regex, "e", 0, NULL, 0), REG_NOERR);
}
TEST_CASE(simple_bracket_chars_range)
{
String pattern = "[a-d]";
regex_t regex;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
EXPECT_EQ(regexec(&regex, "a", 0, NULL, 0), REG_NOERR);
EXPECT_EQ(regexec(&regex, "b", 0, NULL, 0), REG_NOERR);
EXPECT_EQ(regexec(&regex, "c", 0, NULL, 0), REG_NOERR);
EXPECT_EQ(regexec(&regex, "d", 0, NULL, 0), REG_NOERR);
EXPECT_EQ(regexec(&regex, "e", 0, NULL, 0), REG_NOMATCH);
}
TEST_CASE(simple_bracket_chars_range_inverse)
{
String pattern = "[^a-df-z]";
regex_t regex;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
EXPECT_EQ(regexec(&regex, "a", 0, NULL, 0), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "b", 0, NULL, 0), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "c", 0, NULL, 0), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "d", 0, NULL, 0), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "e", 0, NULL, 0), REG_NOERR);
EXPECT_EQ(regexec(&regex, "k", 0, NULL, 0), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "z", 0, NULL, 0), REG_NOMATCH);
}
TEST_CASE(bracket_character_class_uuid)
{
String pattern = "^([[:xdigit:]]{8})-([[:xdigit:]]{4})-([[:xdigit:]]{4})-([[:xdigit:]]{4})-([[:xdigit:]]{12})$";
regex_t regex;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
EXPECT_EQ(regexec(&regex, "fb9b62a2-1579-4e3a-afba-76239ccb6583", 0, NULL, 0), REG_NOERR);
EXPECT_EQ(regexec(&regex, "fb9b62a2", 0, NULL, 0), REG_NOMATCH);
regfree(&regex);
}
TEST_CASE(simple_bracket_character_class_inverse)
{
String pattern = "[^[:digit:]]";
regex_t regex;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
EXPECT_EQ(regexec(&regex, "1", 0, NULL, 0), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "2", 0, NULL, 0), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "3", 0, NULL, 0), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "d", 0, NULL, 0), REG_NOERR);
EXPECT_EQ(regexec(&regex, "e", 0, NULL, 0), REG_NOERR);
}
TEST_CASE(email_address)
{
String pattern = "^[A-Z0-9a-z._%+-]{1,64}@(?:[A-Za-z0-9-]{1,63}\\.){1,125}[A-Za-z]{2,63}$";
regex_t regex;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
EXPECT_EQ(regexec(&regex, "emanuel.sprung@gmail.com", 0, NULL, 0), REG_NOERR);
EXPECT_EQ(regexec(&regex, "kling@serenityos.org", 0, NULL, 0), REG_NOERR);
regfree(&regex);
}
TEST_CASE(error_message)
{
String pattern = "^[A-Z0-9[a-z._%+-]{1,64}@[A-Za-z0-9-]{1,63}\\.{1,125}[A-Za-z]{2,63}$";
regex_t regex;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_EBRACK);
EXPECT_EQ(regexec(&regex, "asdf@asdf.com", 0, NULL, 0), REG_EBRACK);
char buf[1024];
size_t buflen = 1024;
auto len = regerror(0, &regex, buf, buflen);
String expected = "Error during parsing of regular expression:\n ^[A-Z0-9[a-z._%+-]{1,64}@[A-Za-z0-9-]{1,63}\\.{1,125}[A-Za-z]{2,63}$\n ^---- [ ] imbalance.\n";
for (size_t i = 0; i < len; ++i) {
EXPECT_EQ(buf[i], expected[i]);
}
regfree(&regex);
}
TEST_CASE(simple_ignorecase)
{
String pattern = "^hello friends";
regex_t regex;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED | REG_NOSUB | REG_ICASE), REG_NOERR);
EXPECT_EQ(regexec(&regex, "Hello Friends", 0, NULL, 0), REG_NOERR);
EXPECT_EQ(regexec(&regex, "hello Friends", 0, NULL, 0), REG_NOERR);
EXPECT_EQ(regexec(&regex, "hello Friends!", 0, NULL, 0), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "hello Friends!", 0, NULL, REG_GLOBAL), REG_NOERR);
EXPECT_EQ(regexec(&regex, "hell Friends", 0, NULL, 0), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "hell Friends", 0, NULL, REG_GLOBAL), REG_NOMATCH);
regfree(&regex);
}
TEST_CASE(simple_notbol_noteol)
{
String pattern = "^hello friends$";
regex_t regex;
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED | REG_NOSUB | REG_ICASE), REG_NOERR);
EXPECT_EQ(regexec(&regex, "hello friends", 0, NULL, REG_NOTBOL), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "hello friends", 0, NULL, REG_NOTEOL), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "hello friends", 0, NULL, REG_NOTBOL | REG_NOTEOL), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "a hello friends b", 0, NULL, REG_NOTBOL), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "a hello friends", 0, NULL, REG_NOTBOL), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "a hello friends", 0, NULL, REG_NOTBOL | REG_SEARCH), REG_NOERR);
EXPECT_EQ(regexec(&regex, "a hello friends b", 0, NULL, REG_NOTBOL | REG_SEARCH), REG_NOERR);
EXPECT_EQ(regexec(&regex, "a hello friends b", 0, NULL, REG_NOTEOL), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "hello friends b", 0, NULL, REG_NOTEOL), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "hello friends b", 0, NULL, REG_NOTEOL | REG_SEARCH), REG_NOERR);
EXPECT_EQ(regexec(&regex, "a hello friends b", 0, NULL, REG_NOTEOL | REG_SEARCH), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "a hello friends b", 0, NULL, REG_NOTBOL | REG_NOTEOL), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "a hello friends b", 0, NULL, REG_NOTBOL | REG_NOTEOL | REG_SEARCH), REG_NOMATCH);
pattern = "hello friends";
EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED | REG_NOSUB | REG_ICASE), REG_NOERR);
EXPECT_EQ(regexec(&regex, "hello friends", 0, NULL, REG_NOTBOL), REG_NOMATCH);
EXPECT_EQ(regexec(&regex, "hello friends", 0, NULL, REG_NOTEOL), REG_NOMATCH);
regfree(&regex);
}
//#if not(defined(REGEX_DEBUG) || defined(REGEX_MATCH_STATUS) || defined(DISABLE_REGEX_BENCHMARK))
//BENCHMARK_CASE(simple_notbol_noteol_benchmark)
//{
// String pattern = "^hello friends$";
// regex_t regex;
// EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED | REG_NOSUB | REG_ICASE), REG_NOERR);
// for (size_t i = 0; i < BENCHMARK_LOOP_ITERATIONS; ++i) {
// EXPECT_EQ(regexec(&regex, "hello friends", 0, NULL, REG_NOTBOL), REG_NOMATCH);
// EXPECT_EQ(regexec(&regex, "hello friends", 0, NULL, REG_NOTEOL), REG_NOMATCH);
// EXPECT_EQ(regexec(&regex, "hello friends", 0, NULL, REG_NOTBOL | REG_NOTEOL), REG_NOMATCH);
// EXPECT_EQ(regexec(&regex, "a hello friends b", 0, NULL, REG_NOTBOL), REG_NOMATCH);
// EXPECT_EQ(regexec(&regex, "a hello friends", 0, NULL, REG_NOTBOL), REG_NOMATCH);
// EXPECT_EQ(regexec(&regex, "a hello friends", 0, NULL, REG_NOTBOL | REG_SEARCH), REG_NOERR);
// EXPECT_EQ(regexec(&regex, "a hello friends b", 0, NULL, REG_NOTBOL | REG_SEARCH), REG_NOMATCH);
// EXPECT_EQ(regexec(&regex, "a hello friends b", 0, NULL, REG_NOTEOL), REG_NOMATCH);
// EXPECT_EQ(regexec(&regex, "hello friends b", 0, NULL, REG_NOTEOL), REG_NOMATCH);
// EXPECT_EQ(regexec(&regex, "hello friends b", 0, NULL, REG_NOTEOL | REG_SEARCH), REG_NOERR);
// EXPECT_EQ(regexec(&regex, "a hello friends b", 0, NULL, REG_NOTEOL | REG_SEARCH), REG_NOMATCH);
// EXPECT_EQ(regexec(&regex, "a hello friends b", 0, NULL, REG_NOTBOL | REG_NOTEOL), REG_NOMATCH);
// EXPECT_EQ(regexec(&regex, "a hello friends b", 0, NULL, REG_NOTBOL | REG_NOTEOL | REG_SEARCH), REG_NOERR);
// }
// regfree(&regex);
//}
BENCHMARK_CASE(simple_notbol_noteol_benchmark_reference_stdcpp_regex_match)
{
std::regex re1("^hello friends$", std::regex_constants::match_not_bol);
std::regex re2("^hello friends$", std::regex_constants::match_not_eol);
std::regex re3("^hello friends$", std::regex_constants::match_not_bol | std::regex_constants::match_not_eol);
std::regex re4("hello friends", std::regex_constants::match_not_bol);
std::regex re5("hello friends", std::regex_constants::match_not_eol);
std::cmatch m;
//for (size_t i = 0; i < BENCHMARK_LOOP_ITERATIONS; ++i) {
EXPECT_EQ(std::regex_match("hello friends", m, re1), false);
EXPECT_EQ(std::regex_match("hello friends", m, re2), false);
EXPECT_EQ(std::regex_match("hello friends", m, re3), false);
EXPECT_EQ(std::regex_match("a hello friends b", m, re1), false);
EXPECT_EQ(std::regex_match("a hello friends", m, re1), false);
EXPECT_EQ(std::regex_search("a hello friends", m, re1), true);
EXPECT_EQ(std::regex_search("a hello friends b", m, re1), true);
EXPECT_EQ(std::regex_match("a hello friends b", m, re2), false);
EXPECT_EQ(std::regex_match("hello friends b", m, re2), false);
EXPECT_EQ(std::regex_search("hello friends b", m, re2), true);
EXPECT_EQ(std::regex_search("a hello friends b", m, re2), false);
EXPECT_EQ(std::regex_match("a hello friends b", m, re3), false);
EXPECT_EQ(std::regex_search("a hello friends b", m, re3), false);
EXPECT_EQ(std::regex_match("hello friends", m, re4), false);
EXPECT_EQ(std::regex_match("hello friends", m, re5), false);
//}
}
//#endif
TEST_MAIN(Regex)
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