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/*
Copyright (c) Marshall Clow 2010-2012.
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
For more information, see http://www.boost.org
*/
#include <boost/algorithm/searching/boyer_moore.hpp>
#include <boost/algorithm/searching/boyer_moore_horspool.hpp>
#include <boost/algorithm/searching/knuth_morris_pratt.hpp>
#define BOOST_TEST_MAIN
#include <boost/test/unit_test.hpp>
#include <iostream>
#include <string>
#include <vector>
namespace ba = boost::algorithm;
template <typename Iter>
std::string make_str ( Iter first, std::size_t len ) {
std::string retVal ( len + 2, '\'' );
std::copy ( first, first+len, retVal.begin () + 1);
return retVal;
}
namespace {
// Check using iterators
template<typename Container>
void check_one_iter ( const Container &haystack, const std::string &needle, std::ptrdiff_t expected ) {
typedef typename Container::const_iterator iter_type;
typedef typename std::pair<iter_type, iter_type> ret_type;
typedef std::string::const_iterator pattern_type;
iter_type hBeg = haystack.begin ();
iter_type hEnd = haystack.end ();
pattern_type nBeg = needle.begin ();
pattern_type nEnd = needle.end ();
// iter_type ret0 = std::search (hBeg, hEnd, nBeg, nEnd);
ret_type ret1 = ba::boyer_moore_search (hBeg, hEnd, nBeg, nEnd);
ret_type ret1r = ba::boyer_moore_search (haystack, nBeg, nEnd);
ret_type ret2 = ba::boyer_moore_horspool_search (hBeg, hEnd, nBeg, nEnd);
ret_type ret3 = ba::knuth_morris_pratt_search (hBeg, hEnd, nBeg, nEnd);
iter_type it0 = std::search (hBeg, hEnd, nBeg, nEnd);
// iter_type it1 = ret1.first;
// iter_type it1r = ret1r.first;
// iter_type it2 = ret2.first;
// iter_type it3 = ret3.first;
const std::ptrdiff_t dist = ret1.first == hEnd ? -1 : std::distance ( hBeg, ret1.first );
std::cout << "(Iterators) Pattern is " << needle.length () << ", haysstack is " << haystack.length () << " chars long; " << std::endl;
try {
if ( it0 != ret1.first ) {
throw std::runtime_error (
std::string ( "results mismatch between std::search and boyer-moore search" ));
}
if ( ret1.first != ret1r.first || ret1.second != ret1r.second ) {
throw std::runtime_error (
std::string ( "results mismatch between iterator and range boyer_moore search" ));
}
if ( ret1.first != ret2.first || ret1.second != ret2.second ) {
throw std::runtime_error (
std::string ( "results mismatch between boyer-moore and boyer-moore-horspool search" ));
}
if ( ret1.first != ret3.first || ret1.second != ret3.second ) {
throw std::runtime_error (
std::string ( "results mismatch between boyer-moore and knuth-morris-pratt search" ));
}
}
catch ( ... ) {
std::cout << "Searching for: " << needle << std::endl;
std::cout << "Expected: " << expected << "\n";
std::cout << " std: " << std::distance ( hBeg, it0 ) << "\n";
std::cout << " bm: " << std::distance ( hBeg, ret1.first ) << "\n";
std::cout << " bm(r): " << std::distance ( hBeg, ret1r.first ) << "\n";
std::cout << " bmh: " << std::distance ( hBeg, ret2.first ) << "\n";
std::cout << " kpm: " << std::distance ( hBeg, ret3.first )<< "\n";
std::cout << std::flush;
throw ;
}
BOOST_CHECK_EQUAL ( dist, expected );
}
// Check using pointers
// We're assuming that the container implements contiguous storage here.
template<typename Container>
void check_one_pointer ( const Container &haystack, const std::string &needle, std::ptrdiff_t expected ) {
typedef const typename Container::value_type *ptr_type;
typedef typename std::pair<ptr_type, ptr_type> ret_type;
ptr_type hBeg = haystack.size () == 0 ? NULL : &*haystack.begin ();
ptr_type hEnd = hBeg + haystack.size ();
ptr_type nBeg = needle.size () == 0 ? NULL : &*needle.begin ();
ptr_type nEnd = nBeg + needle.size ();
ptr_type it0 = std::search (hBeg, hEnd, nBeg, nEnd);
ret_type ret1 = ba::boyer_moore_search (hBeg, hEnd, nBeg, nEnd);
ret_type ret2 = ba::boyer_moore_horspool_search (hBeg, hEnd, nBeg, nEnd);
ret_type ret3 = ba::knuth_morris_pratt_search (hBeg, hEnd, nBeg, nEnd);
const std::ptrdiff_t dist = ret1.first == hEnd ? -1 : std::distance ( hBeg, ret1.first );
std::cout << "(Pointers) Pattern is " << needle.length () << ", haysstack is " << haystack.length () << " chars long; " << std::endl;
try {
if ( it0 != ret1.first ) {
throw std::runtime_error (
std::string ( "results mismatch between std::search and boyer-moore search" ));
}
if ( ret1.first != ret2.first || ret1.second != ret2.second ) {
throw std::runtime_error (
std::string ( "results mismatch between boyer-moore and boyer-moore-horspool search" ));
}
if ( ret1.first != ret3.first || ret1.second != ret3.second ) {
throw std::runtime_error (
std::string ( "results mismatch between boyer-moore and knuth-morris-pratt search" ));
}
}
catch ( ... ) {
std::cout << "Searching for: " << needle << std::endl;
std::cout << "Expected: " << expected << "\n";
std::cout << " std: " << std::distance ( hBeg, it0 ) << "\n";
std::cout << " bm: " << std::distance ( hBeg, ret1.first ) << "\n";
std::cout << " bmh: " << std::distance ( hBeg, ret2.first ) << "\n";
std::cout << " kpm: " << std::distance ( hBeg, ret3.first )<< "\n";
std::cout << std::flush;
throw ;
}
BOOST_CHECK_EQUAL ( dist, expected );
}
// Check using objects
template<typename Container>
void check_one_object ( const Container &haystack, const std::string &needle, std::ptrdiff_t expected ) {
typedef typename Container::const_iterator iter_type;
typedef typename std::pair<iter_type, iter_type> ret_type;
typedef std::string::const_iterator pattern_type;
iter_type hBeg = haystack.begin ();
iter_type hEnd = haystack.end ();
pattern_type nBeg = needle.begin ();
pattern_type nEnd = needle.end ();
ba::boyer_moore<pattern_type> bm_r = ba::make_boyer_moore ( needle );
ba::boyer_moore<pattern_type> bm ( nBeg, nEnd );
ba::boyer_moore_horspool<pattern_type> bmh ( nBeg, nEnd );
ba::knuth_morris_pratt<pattern_type> kmp ( nBeg, nEnd );
iter_type it0 = std::search (hBeg, hEnd, nBeg, nEnd);
ret_type ret1 = bm (hBeg, hEnd);
ret_type ret1r = bm (haystack);
ret_type retr1 = bm_r (hBeg, hEnd);
ret_type retr1r = bm_r (haystack);
ret_type ret2 = bmh (hBeg, hEnd);
ret_type ret3 = kmp (hBeg, hEnd);
const std::ptrdiff_t dist = ret1.first == hEnd ? -1 : std::distance ( hBeg, ret1.first );
std::cout << "(Objects) Pattern is " << needle.length () << ", haysstack is " << haystack.length () << " chars long; " << std::endl;
try {
if ( it0 != ret1.first ) {
throw std::runtime_error (
std::string ( "results mismatch between std::search and boyer-moore search" ));
}
if ( ret1.first != ret1r.first || ret1.second != ret1r.second ) {
throw std::runtime_error (
std::string ( "results mismatch between iterator and range boyer_moore search(1)" ));
}
if ( ret1.first != retr1.first || ret1.second != retr1.second ) {
throw std::runtime_error (
std::string ( "results mismatch between iterator and range boyer_moore search(2)" ));
}
if ( ret1.first != retr1r.first || ret1.second != retr1r.second ) {
throw std::runtime_error (
std::string ( "results mismatch between iterator and range boyer_moore search(3)" ));
}
if ( ret1.first != ret2.first || ret1.second != ret2.second ) {
throw std::runtime_error (
std::string ( "results mismatch between boyer-moore and boyer-moore-horspool search" ));
}
if ( ret1.first != ret3.first || ret1.second != ret3.second ) {
throw std::runtime_error (
std::string ( "results mismatch between boyer-moore and knuth-morris-pratt search" ));
}
}
catch ( ... ) {
std::cout << "Searching for: " << needle << std::endl;
std::cout << "Expected: " << expected << "\n";
std::cout << " std: " << std::distance ( hBeg, it0 ) << "\n";
std::cout << " bm: " << std::distance ( hBeg, ret1.first ) << "\n";
std::cout << " bm(r1): " << std::distance ( hBeg, ret1r.first ) << "\n";
std::cout << " bm(r2): " << std::distance ( hBeg, retr1.first ) << "\n";
std::cout << " bm(r3): " << std::distance ( hBeg, retr1r.first ) << "\n";
std::cout << " bmh: " << std::distance ( hBeg, ret2.first ) << "\n";
std::cout << " kpm: " << std::distance ( hBeg, ret3.first )<< "\n";
std::cout << std::flush;
throw ;
}
BOOST_CHECK_EQUAL ( dist, expected );
}
template<typename Container>
void check_one ( const Container &haystack, const std::string &needle, std::ptrdiff_t expected ) {
check_one_iter ( haystack, needle, expected );
check_one_pointer ( haystack, needle, expected );
check_one_object ( haystack, needle, expected );
}
}
BOOST_AUTO_TEST_CASE( test_main )
{
std::string haystack1 ( "NOW AN FOWE\220ER ANNMAN THE ANPANMANEND" );
std::string needle1 ( "ANPANMAN" );
std::string needle2 ( "MAN THE" );
std::string needle3 ( "WE\220ER" );
std::string needle4 ( "NOW " ); // At the beginning
std::string needle5 ( "NEND" ); // At the end
std::string needle6 ( "NOT FOUND" ); // Nowhere
std::string needle7 ( "NOT FO\340ND" ); // Nowhere
std::string haystack2 ( "ABC ABCDAB ABCDABCDABDE" );
std::string needle11 ( "ABCDABD" );
std::string haystack3 ( "abra abracad abracadabra" );
std::string needle12 ( "abracadabra" );
std::string needle13 ( "" );
std::string haystack4 ( "" );
check_one ( haystack1, needle1, 26 );
check_one ( haystack1, needle2, 18 );
check_one ( haystack1, needle3, 9 );
check_one ( haystack1, needle4, 0 );
check_one ( haystack1, needle5, 33 );
check_one ( haystack1, needle6, -1 );
check_one ( haystack1, needle7, -1 );
check_one ( needle1, haystack1, -1 ); // cant find long pattern in short corpus
check_one ( haystack1, haystack1, 0 ); // find something in itself
check_one ( haystack2, haystack2, 0 ); // find something in itself
check_one ( haystack2, needle11, 15 );
check_one ( haystack3, needle12, 13 );
check_one ( haystack1, needle13, 0 ); // find the empty string
check_one ( haystack4, needle1, -1 ); // can't find in an empty haystack
// Mikhail Levin <svarneticist@gmail.com> found a problem, and this was the test
// that triggered it.
const std::string mikhail_pattern =
"GATACACCTACCTTCACCAGTTACTCTATGCACTAGGTGCGCCAGGCCCATGCACAAGGGCTTGAGTGGATGGGAAGGA"
"TGTGCCCTAGTGATGGCAGCATAAGCTACGCAGAGAAGTTCCAGGGCAGAGTCACCATGACCAGGGACACATCCACGAG"
"CACAGCCTACATGGAGCTGAGCAGCCTGAGATCTGAAGACACGGCCATGTATTACTGTGGGAGAGATGTCTGGAGTGGT"
"TATTATTGCCCCGGTAATATTACTACTACTACTACTACATGGACGTCTGGGGCAAAGGGACCACG"
;
const std::string mikhail_corpus = std::string (8, 'a') + mikhail_pattern;
check_one ( mikhail_corpus, mikhail_pattern, 8 );
}
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