96 lines
2.2 KiB
C++
96 lines
2.2 KiB
C++
/*
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VIM: let b:lcppflags="-std=c++14 -O2 -pthread -I."
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VIM: let b:wcppflags="/O2 /EHsc /DWIN32"
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VIM-: let b:cppflags=g:Iboost.g:Itbb
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VIM-: let b:ldflags=g:Lboost.g:Ltbb
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VIM-: let b:ldlibpath=g:Bboost.g:Btbb
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VIM-: let b:argv=""
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*/
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#include <iostream>
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#include <exception>
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#include <chrono>
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#include <string>
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/*
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Simple wildcard match.
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*/
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bool wildcard_match(const std::string& input, const std::string& pattern)
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{
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int j = 0;
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int i = 0;
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int restart_idx = -1;
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while ( i < input.size() )
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{
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while ( j < pattern.size() && pattern[j] == '*' ){
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restart_idx = ++j;
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}
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if ( j<pattern.size() && pattern[j] == input[i] ) {
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++i;
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++j;
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}
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else if ( j>= 0 && pattern[j-1] == '*' ) {
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++i;
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}
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else if ( restart_idx > 0 ) {
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i -= j - restart_idx -1;
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j = restart_idx;
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}
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else {
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return false;
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}
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}
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while ( j < pattern.size() && pattern[j] == '*' ){
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++j;
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}
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return j == pattern.size();
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}
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void test(const std::string& input, const std::string& pattern)
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{
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std::cout << input << " x " << pattern
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<< " == " << wildcard_match(input,pattern)
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<< std::endl;
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}
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int main ( void )
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{try{
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auto begin = std::chrono::high_resolution_clock::now();
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test("zebra", "dog");
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test("zebra", "zebra");
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test("zebra", "*br*");
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test("zebra", "*bi*");
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test("zebra", "*br*a");
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test("zebra", "*br*b");
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test("zebra", "z**a");
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test("zebra", "z*a");
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test("zebra", "x**a");
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test("zebrabrb", "*brb*");
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test("zebra", "*bra*");
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test("zebrazebrazebra", "*bra*zeb*zeb*");
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test("zebrbzebrazebra", "*bra*zeb*zeb*");
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test("zebrbzebrazebra", "*bra*zeb*");
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test("zebrbzebrazebra", "*****bra*zeb*****");
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auto end = std::chrono::high_resolution_clock::now();
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std::chrono::duration<double> seconds = end - begin;
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std::cout << "Time: " << seconds.count() << std::endl;
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return 0;
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}
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catch ( const std::exception& e )
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{
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std::cerr << std::endl
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<< "std::exception(\"" << e.what() << "\")." << std::endl;
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return 2;
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}
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catch ( ... )
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{
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std::cerr << std::endl
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<< "unknown exception." << std::endl;
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return 1;
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}}
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