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/*
* capture_ut.cpp --
*
* Copyright (c) 2007-2010, Dmitry Prokoptsev <dprokoptsev@gmail.com>,
* Alexander Gololobov <agololobov@gmail.com>
*
* This file is part of Pire, the Perl Incompatible
* Regular Expressions library.
*
* Pire is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Pire is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser Public License for more details.
* You should have received a copy of the GNU Lesser Public License
* along with Pire. If not, see <http://www.gnu.org/licenses>.
*/
#include <stub/hacks.h>
#include <stub/saveload.h>
#include <stub/utf8.h>
#include <stub/memstreams.h>
#include "stub/cppunit.h"
#include <pire.h>
#include <extra.h>
#include <string.h>
Y_UNIT_TEST_SUITE(TestPireCapture) {
using Pire::CapturingScanner;
using Pire::SlowCapturingScanner;
typedef Pire::CapturingScanner::State State;
CapturingScanner Compile(const char* regexp, int index)
{
Pire::Lexer lexer;
lexer.Assign(regexp, regexp + strlen(regexp));
lexer.AddFeature(Pire::Features::CaseInsensitive());
lexer.AddFeature(Pire::Features::Capture((size_t) index));
Pire::Fsm fsm = lexer.Parse();
fsm.Surround();
fsm.Determine();
return fsm.Compile<Pire::CapturingScanner>();
}
SlowCapturingScanner SlowCompile(const char* regexp, int index, const Pire::Encoding& encoding = Pire::Encodings::Utf8())
{
Pire::Lexer lexer;
lexer.AddFeature(Pire::Features::Capture(static_cast<size_t>(index)));
lexer.SetEncoding(encoding);
TVector<wchar32> ucs4;
encoding.FromLocal(regexp, regexp + strlen(regexp), std::back_inserter(ucs4));
lexer.Assign(ucs4.begin(), ucs4.end());
Pire::Fsm fsm = lexer.Parse();
fsm.Surround();
return fsm.Compile<Pire::SlowCapturingScanner>();
}
State RunRegexp(const CapturingScanner& scanner, const char* str)
{
State state;
scanner.Initialize(state);
Step(scanner, state, Pire::BeginMark);
Run(scanner, state, str, str + strlen(str));
Step(scanner, state, Pire::EndMark);
return state;
}
SlowCapturingScanner::State RunRegexp(const SlowCapturingScanner& scanner, const char* str)
{
SlowCapturingScanner::State state;
scanner.Initialize(state);
Run(scanner, state, str, str + strlen(str));
return state;
}
ystring Captured(const State& state, const char* str)
{
if (state.Captured())
return ystring(str + state.Begin() - 1, str + state.End() - 1);
else
return ystring();
}
Y_UNIT_TEST(Trivial)
{
CapturingScanner scanner = Compile("google_id\\s*=\\s*[\'\"]([a-z0-9]+)[\'\"]\\s*;", 1);
State state;
const char* str;
str = "google_id = 'abcde';";
state = RunRegexp(scanner, str);
UNIT_ASSERT(state.Captured());
UNIT_ASSERT_EQUAL(Captured(state, str), ystring("abcde"));
str = "var google_id = 'abcde'; eval(google_id);";
state = RunRegexp(scanner, str);
UNIT_ASSERT(state.Captured());
UNIT_ASSERT_EQUAL(Captured(state, str), ystring("abcde"));
str = "google_id != 'abcde';";
state = RunRegexp(scanner, str);
UNIT_ASSERT(!state.Captured());
}
Y_UNIT_TEST(Sequential)
{
CapturingScanner scanner = Compile("google_id\\s*=\\s*[\'\"]([a-z0-9]+)[\'\"]\\s*;", 1);
State state;
const char* str;
str = "google_id = 'abcde'; google_id = 'xyz';";
state = RunRegexp(scanner, str);
UNIT_ASSERT(state.Captured());
UNIT_ASSERT_VALUES_EQUAL(Captured(state, str), ystring("abcde"));
str = "var google_id = 'abc de'; google_id = 'xyz';";
state = RunRegexp(scanner, str);
UNIT_ASSERT(state.Captured());
UNIT_ASSERT_VALUES_EQUAL(Captured(state, str), ystring("xyz"));
}
Y_UNIT_TEST(NegatedTerminator)
{
CapturingScanner scanner = Compile("=(\\d+)[^\\d]", 1);
State state;
const char* str;
str = "=12345;";
state = RunRegexp(scanner, str);
UNIT_ASSERT(state.Captured());
UNIT_ASSERT_EQUAL(Captured(state, str), ystring("12345"));
}
Y_UNIT_TEST(Serialization)
{
const char* regex = "google_id\\s*=\\s*[\'\"]([a-z0-9]+)[\'\"]\\s*;";
CapturingScanner scanner2 = Compile(regex, 1);
SlowCapturingScanner slowScanner2 = SlowCompile(regex, 1);
BufferOutput wbuf, wbuf2;
::Save(&wbuf, scanner2);
::Save(&wbuf2, slowScanner2);
MemoryInput rbuf(wbuf.Buffer().Data(), wbuf.Buffer().Size());
MemoryInput rbuf2(wbuf2.Buffer().Data(), wbuf2.Buffer().Size());
CapturingScanner scanner;
SlowCapturingScanner slowScanner;
::Load(&rbuf, scanner);
::Load(&rbuf2, slowScanner);
State state;
SlowCapturingScanner::State slowState;
const char* str;
str = "google_id = 'abcde';";
state = RunRegexp(scanner, str);
slowState = RunRegexp(slowScanner, str);
UNIT_ASSERT(state.Captured());
UNIT_ASSERT_EQUAL(Captured(state, str), ystring("abcde"));
SlowCapturingScanner::SingleState final;
UNIT_ASSERT(slowScanner.GetCapture(slowState, final));
ystring ans(str, final.GetBegin(), final.GetEnd() - final.GetBegin());
UNIT_ASSERT_EQUAL(ans, ystring("abcde"));
str = "google_id != 'abcde';";
state = RunRegexp(scanner, str);
slowState = RunRegexp(slowScanner, str);
UNIT_ASSERT(!state.Captured());
UNIT_ASSERT(!slowScanner.GetCapture(slowState, final));
CapturingScanner scanner3;
const size_t MaxTestOffset = 2 * sizeof(Pire::Impl::MaxSizeWord);
TVector<char> buf2(wbuf.Buffer().Size() + sizeof(size_t) + MaxTestOffset);
const void* ptr = Pire::Impl::AlignUp(&buf2[0], sizeof(size_t));
memcpy((void*) ptr, wbuf.Buffer().Data(), wbuf.Buffer().Size());
const void* tail = scanner3.Mmap(ptr, wbuf.Buffer().Size());
UNIT_ASSERT_EQUAL(tail, (const void*) ((size_t)ptr + wbuf.Buffer().Size()));
str = "google_id = 'abcde';";
state = RunRegexp(scanner3, str);
UNIT_ASSERT(state.Captured());
UNIT_ASSERT_EQUAL(Captured(state, str), ystring("abcde"));
str = "google_id != 'abcde';";
state = RunRegexp(scanner3, str);
UNIT_ASSERT(!state.Captured());
ptr = (const void*) ((const char*) wbuf.Buffer().Data() + 1);
try {
scanner3.Mmap(ptr, wbuf.Buffer().Size());
UNIT_ASSERT(!"CapturingScanner failed to check for misaligned mmaping");
}
catch (Pire::Error&) {}
for (size_t offset = 1; offset < MaxTestOffset; ++offset) {
ptr = Pire::Impl::AlignUp(&buf2[0], sizeof(size_t)) + offset;
memcpy((void*) ptr, wbuf.Buffer().Data(), wbuf.Buffer().Size());
try {
scanner3.Mmap(ptr, wbuf.Buffer().Size());
if (offset % sizeof(size_t) != 0) {
UNIT_ASSERT(!"CapturingScanner failed to check for misaligned mmaping");
} else {
str = "google_id = 'abcde';";
state = RunRegexp(scanner3, str);
UNIT_ASSERT(state.Captured());
}
}
catch (Pire::Error&) {}
}
}
Y_UNIT_TEST(Empty)
{
Pire::CapturingScanner sc;
UNIT_ASSERT(sc.Empty());
UNIT_CHECKPOINT(); RunRegexp(sc, "a string"); // Just should not crash
// Test Save/Load/Mmap
BufferOutput wbuf;
::Save(&wbuf, sc);
MemoryInput rbuf(wbuf.Buffer().Data(), wbuf.Buffer().Size());
Pire::CapturingScanner sc3;
::Load(&rbuf, sc3);
UNIT_CHECKPOINT(); RunRegexp(sc3, "a string");
const size_t MaxTestOffset = 2 * sizeof(Pire::Impl::MaxSizeWord);
TVector<char> buf2(wbuf.Buffer().Size() + sizeof(size_t) + MaxTestOffset);
const void* ptr = Pire::Impl::AlignUp(&buf2[0], sizeof(size_t));
memcpy((void*) ptr, wbuf.Buffer().Data(), wbuf.Buffer().Size());
Pire::CapturingScanner sc4;
const void* tail = sc4.Mmap(ptr, wbuf.Buffer().Size());
UNIT_ASSERT_EQUAL(tail, (const void*) ((size_t)ptr + wbuf.Buffer().Size()));
UNIT_CHECKPOINT(); RunRegexp(sc4, "a string");
}
void MakeSlowCapturingTest(const char* regexp, const char* text, size_t position, bool ans, const ystring& captured = ystring(""), const Pire::Encoding& encoding = Pire::Encodings::Utf8())
{
Pire::SlowCapturingScanner sc = SlowCompile(regexp, position, encoding);
SlowCapturingScanner::State st = RunRegexp(sc, text);
SlowCapturingScanner::SingleState fin;
bool ifCaptured = sc.GetCapture(st, fin);
if (ans) {
UNIT_ASSERT(ifCaptured);
ystring answer(text, fin.GetBegin(), fin.GetEnd() - fin.GetBegin());
UNIT_ASSERT_EQUAL(answer, captured);
} else {
UNIT_ASSERT(!ifCaptured);
}
}
Y_UNIT_TEST(SlowCapturingNonGreedy)
{
const char* regexp = ".*?(pref.*suff)";
const char* text = "pref ala bla pref cla suff dla";
MakeSlowCapturingTest(regexp, text, 1, true, ystring("pref ala bla pref cla suff"));
}
Y_UNIT_TEST(SlowCaptureGreedy)
{
const char* regexp = ".*(pref.*suff)";
const char* text = "pref ala bla pref cla suff dla";
MakeSlowCapturingTest(regexp, text, 1, true, ystring("pref cla suff"));
}
Y_UNIT_TEST(SlowCaptureInOr)
{
const char* regexp = "(A)|A";
const char* text = "A";
MakeSlowCapturingTest(regexp, text, 1, true, ystring("A"));
const char* regexp2 = "A|(A)";
MakeSlowCapturingTest(regexp2, text, 1, false);
}
Y_UNIT_TEST(SlowCapturing)
{
const char* regexp = "^http://vk(ontakte[.]ru|[.]com)/id(\\d+)([^0-9]|$)";
const char* text = "http://vkontakte.ru/id100500";
MakeSlowCapturingTest(regexp, text, 2, true, ystring("100500"));
}
Y_UNIT_TEST(Utf_8)
{
const char* regexp = "\xd0\x97\xd0\xb4\xd1\x80\xd0\xb0\xd0\xb2\xd1\x81\xd1\x82\xd0\xb2\xd1\x83\xd0\xb9\xd1\x82\xd0\xb5, ((\\s|\\w|[()]|-)+)!";
const char* text =" \xd0\x97\xd0\xb4\xd1\x80\xd0\xb0\xd0\xb2\xd1\x81\xd1\x82\xd0\xb2\xd1\x83\xd0\xb9\xd1\x82\xd0\xb5, \xd0\xa3\xd0\xb2\xd0\xb0\xd0\xb6\xd0\xb0\xd0\xb5\xd0\xbc\xd1\x8b\xd0\xb9 (-\xd0\xb0\xd1\x8f)! ";
const char* ans = "\xd0\xa3\xd0\xb2\xd0\xb0\xd0\xb6\xd0\xb0\xd0\xb5\xd0\xbc\xd1\x8b\xd0\xb9 (-\xd0\xb0\xd1\x8f)";
MakeSlowCapturingTest(regexp, text, 1, true, ystring(ans));
}
}
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