[51587aa] | 1 | // |
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo |
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| 3 | // |
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| 4 | // The contents of this file are covered under the licence agreement in the |
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| 5 | // file "LICENCE" distributed with Cforall. |
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| 6 | // |
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[60089f4] | 7 | // utility.h -- |
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[51587aa] | 8 | // |
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| 9 | // Author : Richard C. Bilson |
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| 10 | // Created On : Mon May 18 07:44:20 2015 |
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[9dc31c10] | 11 | // Last Modified By : Peter A. Buhr |
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[b6d7f44] | 12 | // Last Modified On : Sun May 6 22:24:16 2018 |
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| 13 | // Update Count : 40 |
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[51587aa] | 14 | // |
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[01aeade] | 15 | |
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[6b0b624] | 16 | #pragma once |
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[51b7345] | 17 | |
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[e491159] | 18 | #include <cctype> |
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[940bba3] | 19 | #include <algorithm> |
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[2e30d47] | 20 | #include <functional> |
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[51b7345] | 21 | #include <iostream> |
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| 22 | #include <iterator> |
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| 23 | #include <list> |
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[e491159] | 24 | #include <memory> |
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| 25 | #include <sstream> |
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| 26 | #include <string> |
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[55a68c3] | 27 | #include <type_traits> |
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[fbecee5] | 28 | #include <utility> |
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[51b7345] | 29 | |
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[294647b] | 30 | #include <cassert> |
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[be9288a] | 31 | |
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[50377a4] | 32 | #include "Common/Indenter.h" |
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| 33 | |
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[5cbacf1] | 34 | class Expression; |
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| 35 | |
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[51b7345] | 36 | template< typename T > |
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[01aeade] | 37 | static inline T * maybeClone( const T *orig ) { |
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| 38 | if ( orig ) { |
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| 39 | return orig->clone(); |
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| 40 | } else { |
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| 41 | return 0; |
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| 42 | } // if |
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[51b7345] | 43 | } |
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| 44 | |
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[a7741435] | 45 | template< typename T, typename U > |
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[e04ef3a] | 46 | struct maybeBuild_t { |
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| 47 | static T * doit( const U *orig ) { |
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| 48 | if ( orig ) { |
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| 49 | return orig->build(); |
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| 50 | } else { |
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| 51 | return 0; |
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| 52 | } // if |
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| 53 | } |
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| 54 | }; |
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| 55 | |
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[51b7345] | 56 | template< typename T, typename U > |
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[01aeade] | 57 | static inline T * maybeBuild( const U *orig ) { |
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[e04ef3a] | 58 | return maybeBuild_t<T,U>::doit(orig); |
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[51b7345] | 59 | } |
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| 60 | |
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[7ecbb7e] | 61 | template< typename T, typename U > |
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| 62 | static inline T * maybeMoveBuild( const U *orig ) { |
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| 63 | T* ret = maybeBuild<T>(orig); |
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| 64 | delete orig; |
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| 65 | return ret; |
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| 66 | } |
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| 67 | |
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[51b7345] | 68 | template< typename Input_iterator > |
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[01aeade] | 69 | void printEnums( Input_iterator begin, Input_iterator end, const char * const *name_array, std::ostream &os ) { |
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| 70 | for ( Input_iterator i = begin; i != end; ++i ) { |
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| 71 | os << name_array[ *i ] << ' '; |
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| 72 | } // for |
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[51b7345] | 73 | } |
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| 74 | |
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| 75 | template< typename Container > |
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[01aeade] | 76 | void deleteAll( Container &container ) { |
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| 77 | for ( typename Container::iterator i = container.begin(); i != container.end(); ++i ) { |
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| 78 | delete *i; |
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| 79 | } // for |
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[51b7345] | 80 | } |
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| 81 | |
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| 82 | template< typename Container > |
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[50377a4] | 83 | void printAll( const Container &container, std::ostream &os, Indenter indent = {} ) { |
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[01aeade] | 84 | for ( typename Container::const_iterator i = container.begin(); i != container.end(); ++i ) { |
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| 85 | if ( *i ) { |
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[50377a4] | 86 | os << indent; |
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| 87 | (*i)->print( os, indent ); |
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[60089f4] | 88 | // need an endl after each element because it's not easy to know when each individual item should end |
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[01aeade] | 89 | os << std::endl; |
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| 90 | } // if |
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| 91 | } // for |
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[51b7345] | 92 | } |
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| 93 | |
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| 94 | template< typename SrcContainer, typename DestContainer > |
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[01aeade] | 95 | void cloneAll( const SrcContainer &src, DestContainer &dest ) { |
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| 96 | typename SrcContainer::const_iterator in = src.begin(); |
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| 97 | std::back_insert_iterator< DestContainer > out( dest ); |
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| 98 | while ( in != src.end() ) { |
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| 99 | *out++ = (*in++)->clone(); |
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| 100 | } // while |
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[51b7345] | 101 | } |
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| 102 | |
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[54c9000] | 103 | template< typename SrcContainer, typename DestContainer, typename Predicate > |
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| 104 | void cloneAll_if( const SrcContainer &src, DestContainer &dest, Predicate pred ) { |
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| 105 | std::back_insert_iterator< DestContainer > out( dest ); |
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| 106 | for ( auto x : src ) { |
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| 107 | if ( pred(x) ) { |
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| 108 | *out++ = x->clone(); |
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| 109 | } |
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| 110 | } // while |
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| 111 | } |
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| 112 | |
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[51b7345] | 113 | template< typename Container > |
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[01aeade] | 114 | void assertAll( const Container &container ) { |
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| 115 | int count = 0; |
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| 116 | for ( typename Container::const_iterator i = container.begin(); i != container.end(); ++i ) { |
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| 117 | if ( !(*i) ) { |
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| 118 | std::cerr << count << " is null" << std::endl; |
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| 119 | } // if |
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| 120 | } // for |
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| 121 | } |
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| 122 | |
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[51b7345] | 123 | template < typename T > |
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[01aeade] | 124 | std::list<T> tail( std::list<T> l ) { |
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| 125 | if ( ! l.empty() ) { |
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| 126 | std::list<T> ret(++(l.begin()), l.end()); |
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| 127 | return ret; |
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| 128 | } // if |
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[51b7345] | 129 | } |
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| 130 | |
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| 131 | template < typename T > |
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| 132 | std::list<T> flatten( std::list < std::list<T> > l) { |
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[01aeade] | 133 | typedef std::list <T> Ts; |
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[51b7345] | 134 | |
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[01aeade] | 135 | Ts ret; |
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[51b7345] | 136 | |
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[a08ba92] | 137 | switch ( l.size() ) { |
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[01aeade] | 138 | case 0: |
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| 139 | return ret; |
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| 140 | case 1: |
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| 141 | return l.front(); |
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| 142 | default: |
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| 143 | ret = flatten(tail(l)); |
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| 144 | ret.insert(ret.begin(), l.front().begin(), l.front().end()); |
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| 145 | return ret; |
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| 146 | } // switch |
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[51b7345] | 147 | } |
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| 148 | |
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[60089f4] | 149 | template < typename T > |
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[2298f728] | 150 | void toString_single( std::ostream & os, const T & value ) { |
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[79970ed] | 151 | os << value; |
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| 152 | } |
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| 153 | |
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| 154 | template < typename T, typename... Params > |
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[2298f728] | 155 | void toString_single( std::ostream & os, const T & value, const Params & ... params ) { |
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[79970ed] | 156 | os << value; |
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| 157 | toString_single( os, params ... ); |
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| 158 | } |
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| 159 | |
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| 160 | template < typename ... Params > |
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[2298f728] | 161 | std::string toString( const Params & ... params ) { |
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[5f2f2d7] | 162 | std::ostringstream os; |
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[79970ed] | 163 | toString_single( os, params... ); |
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[5f2f2d7] | 164 | return os.str(); |
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[51b7345] | 165 | } |
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| 166 | |
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[babeeda] | 167 | #define toCString( ... ) toString( __VA_ARGS__ ).c_str() |
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| 168 | |
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[3c13c03] | 169 | // replace element of list with all elements of another list |
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[51b7345] | 170 | template< typename T > |
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| 171 | void replace( std::list< T > &org, typename std::list< T >::iterator pos, std::list< T > &with ) { |
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[01aeade] | 172 | typename std::list< T >::iterator next = pos; advance( next, 1 ); |
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[51b7345] | 173 | |
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[01aeade] | 174 | //if ( next != org.end() ) { |
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[a08ba92] | 175 | org.erase( pos ); |
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| 176 | org.splice( next, with ); |
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| 177 | //} |
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[51b7345] | 178 | |
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[01aeade] | 179 | return; |
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[51b7345] | 180 | } |
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| 181 | |
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[3c13c03] | 182 | // replace range of a list with a single element |
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| 183 | template< typename T > |
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| 184 | void replace( std::list< T > &org, typename std::list< T >::iterator begin, typename std::list< T >::iterator end, const T & with ) { |
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| 185 | org.insert( begin, with ); |
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| 186 | org.erase( begin, end ); |
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| 187 | } |
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| 188 | |
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[940bba3] | 189 | template< typename... Args > |
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| 190 | auto filter(Args&&... args) -> decltype(std::copy_if(std::forward<Args>(args)...)) { |
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| 191 | return std::copy_if(std::forward<Args>(args)...); |
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[51b7345] | 192 | } |
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| 193 | |
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[2bf9c37] | 194 | template <typename E, typename UnaryPredicate, template< typename, typename...> class Container, typename... Args > |
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| 195 | void filter( Container< E *, Args... > & container, UnaryPredicate pred, bool doDelete ) { |
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| 196 | auto i = begin( container ); |
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| 197 | while ( i != end( container ) ) { |
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| 198 | auto it = next( i ); |
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| 199 | if ( pred( *i ) ) { |
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| 200 | if ( doDelete ) { |
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| 201 | delete *i; |
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| 202 | } // if |
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| 203 | container.erase( i ); |
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| 204 | } // if |
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| 205 | i = it; |
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| 206 | } // while |
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| 207 | } |
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| 208 | |
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[940bba3] | 209 | template< typename... Args > |
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| 210 | auto zip(Args&&... args) -> decltype(zipWith(std::forward<Args>(args)..., std::make_pair)) { |
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| 211 | return zipWith(std::forward<Args>(args)..., std::make_pair); |
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[51b7345] | 212 | } |
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| 213 | |
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| 214 | template< class InputIterator1, class InputIterator2, class OutputIterator, class BinFunction > |
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| 215 | void zipWith( InputIterator1 b1, InputIterator1 e1, InputIterator2 b2, InputIterator2 e2, OutputIterator out, BinFunction func ) { |
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[01aeade] | 216 | while ( b1 != e1 && b2 != e2 ) |
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| 217 | *out++ = func(*b1++, *b2++); |
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[51b7345] | 218 | } |
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| 219 | |
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[d939274] | 220 | // it's nice to actually be able to increment iterators by an arbitrary amount |
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[940bba3] | 221 | template< class InputIt, class Distance > |
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| 222 | InputIt operator+( InputIt it, Distance n ) { |
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| 223 | advance(it, n); |
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| 224 | return it; |
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[d939274] | 225 | } |
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| 226 | |
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[79970ed] | 227 | template< typename T > |
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| 228 | void warn_single( const T & arg ) { |
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| 229 | std::cerr << arg << std::endl; |
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| 230 | } |
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| 231 | |
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| 232 | template< typename T, typename... Params > |
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| 233 | void warn_single(const T & arg, const Params & ... params ) { |
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| 234 | std::cerr << arg; |
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| 235 | warn_single( params... ); |
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| 236 | } |
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| 237 | |
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| 238 | template< typename... Params > |
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| 239 | void warn( const Params & ... params ) { |
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| 240 | std::cerr << "Warning: "; |
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| 241 | warn_single( params... ); |
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| 242 | } |
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| 243 | |
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[bc3127d] | 244 | /// determines if `pref` is a prefix of `str` |
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| 245 | static inline bool isPrefix( const std::string & str, const std::string & pref ) { |
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| 246 | if ( pref.size() > str.size() ) return false; |
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| 247 | auto its = std::mismatch( pref.begin(), pref.end(), str.begin() ); |
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| 248 | return its.first == pref.end(); |
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| 249 | } |
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| 250 | |
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[940bba3] | 251 | // ----------------------------------------------------------------------------- |
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| 252 | // Ref Counted Singleton class |
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| 253 | // Objects that inherit from this class will have at most one reference to it |
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| 254 | // but if all references die, the object will be deleted. |
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| 255 | |
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[e491159] | 256 | template< typename ThisType > |
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| 257 | class RefCountSingleton { |
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| 258 | public: |
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| 259 | static std::shared_ptr<ThisType> get() { |
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| 260 | if( global_instance.expired() ) { |
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| 261 | std::shared_ptr<ThisType> new_instance = std::make_shared<ThisType>(); |
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| 262 | global_instance = new_instance; |
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| 263 | return std::move(new_instance); |
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| 264 | } |
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| 265 | return global_instance.lock(); |
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| 266 | } |
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| 267 | private: |
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| 268 | static std::weak_ptr<ThisType> global_instance; |
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| 269 | }; |
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| 270 | |
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[1f75e2d] | 271 | template< typename ThisType > |
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| 272 | std::weak_ptr<ThisType> RefCountSingleton<ThisType>::global_instance; |
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| 273 | |
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[940bba3] | 274 | // ----------------------------------------------------------------------------- |
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[c8dfcd3] | 275 | // RAII object to regulate "save and restore" behaviour, e.g. |
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| 276 | // void Foo::bar() { |
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| 277 | // ValueGuard<int> guard(var); // var is a member of type Foo |
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| 278 | // var = ...; |
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| 279 | // } // var's original value is restored |
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| 280 | template< typename T > |
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| 281 | struct ValueGuard { |
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| 282 | T old; |
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| 283 | T& ref; |
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| 284 | |
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| 285 | ValueGuard(T& inRef) : old(inRef), ref(inRef) {} |
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| 286 | ~ValueGuard() { ref = old; } |
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| 287 | }; |
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| 288 | |
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[134322e] | 289 | template< typename T > |
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| 290 | struct ValueGuardPtr { |
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| 291 | T old; |
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| 292 | T* ref; |
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| 293 | |
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| 294 | ValueGuardPtr(T * inRef) : old( inRef ? *inRef : T() ), ref(inRef) {} |
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| 295 | ~ValueGuardPtr() { if( ref ) *ref = old; } |
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| 296 | }; |
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| 297 | |
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[234223f] | 298 | template< typename aT > |
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| 299 | struct FuncGuard { |
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| 300 | aT m_after; |
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| 301 | |
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| 302 | template< typename bT > |
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| 303 | FuncGuard( bT before, aT after ) : m_after( after ) { |
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| 304 | before(); |
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| 305 | } |
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| 306 | |
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| 307 | ~FuncGuard() { |
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| 308 | m_after(); |
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| 309 | } |
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| 310 | }; |
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| 311 | |
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| 312 | template< typename bT, typename aT > |
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| 313 | FuncGuard<aT> makeFuncGuard( bT && before, aT && after ) { |
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| 314 | return FuncGuard<aT>( std::forward<bT>(before), std::forward<aT>(after) ); |
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| 315 | } |
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| 316 | |
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[134322e] | 317 | template< typename T > |
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| 318 | struct ValueGuardPtr< std::list< T > > { |
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| 319 | std::list< T > old; |
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| 320 | std::list< T >* ref; |
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| 321 | |
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| 322 | ValueGuardPtr( std::list< T > * inRef) : old(), ref(inRef) { |
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| 323 | if( ref ) { swap( *ref, old ); } |
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| 324 | } |
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| 325 | ~ValueGuardPtr() { if( ref ) { swap( *ref, old ); } } |
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| 326 | }; |
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| 327 | |
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[940bba3] | 328 | // ----------------------------------------------------------------------------- |
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| 329 | // Helper struct and function to support |
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| 330 | // for ( val : reverseIterate( container ) ) {} |
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| 331 | // syntax to have a for each that iterates backwards |
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| 332 | |
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[44f6341] | 333 | template< typename T > |
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[4a9ccc3] | 334 | struct reverse_iterate_t { |
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[44f6341] | 335 | T& ref; |
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| 336 | |
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[4a9ccc3] | 337 | reverse_iterate_t( T & ref ) : ref(ref) {} |
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[44f6341] | 338 | |
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| 339 | typedef typename T::reverse_iterator iterator; |
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| 340 | iterator begin() { return ref.rbegin(); } |
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| 341 | iterator end() { return ref.rend(); } |
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| 342 | }; |
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| 343 | |
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| 344 | template< typename T > |
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[4a9ccc3] | 345 | reverse_iterate_t< T > reverseIterate( T & ref ) { |
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| 346 | return reverse_iterate_t< T >( ref ); |
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[44f6341] | 347 | } |
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| 348 | |
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[3ad7978] | 349 | template< typename OutType, typename Range, typename Functor > |
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| 350 | OutType map_range( const Range& range, Functor&& functor ) { |
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| 351 | OutType out; |
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| 352 | |
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| 353 | std::transform( |
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| 354 | begin( range ), |
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| 355 | end( range ), |
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| 356 | std::back_inserter( out ), |
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| 357 | std::forward< Functor >( functor ) |
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| 358 | ); |
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| 359 | |
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| 360 | return out; |
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| 361 | } |
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| 362 | |
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[4a9ccc3] | 363 | // ----------------------------------------------------------------------------- |
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| 364 | // Helper struct and function to support |
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| 365 | // for ( val : group_iterate( container1, container2, ... ) ) {} |
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| 366 | // syntax to have a for each that iterates multiple containers of the same length |
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[55a68c3] | 367 | // TODO: update to use variadic arguments |
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[4a9ccc3] | 368 | |
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| 369 | template< typename T1, typename T2 > |
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| 370 | struct group_iterate_t { |
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[50377a4] | 371 | private: |
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| 372 | std::tuple<T1, T2> args; |
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| 373 | public: |
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[6d267ca] | 374 | group_iterate_t( bool skipBoundsCheck, const T1 & v1, const T2 & v2 ) : args(v1, v2) { |
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[3c09d47] | 375 | assertf(skipBoundsCheck || v1.size() == v2.size(), "group iteration requires containers of the same size: <%zd, %zd>.", v1.size(), v2.size()); |
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[4a9ccc3] | 376 | }; |
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| 377 | |
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[50377a4] | 378 | typedef std::tuple<decltype(*std::get<0>(args).begin()), decltype(*std::get<1>(args).begin())> value_type; |
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| 379 | typedef decltype(std::get<0>(args).begin()) T1Iter; |
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| 380 | typedef decltype(std::get<1>(args).begin()) T2Iter; |
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| 381 | |
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[4a9ccc3] | 382 | struct iterator { |
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| 383 | typedef std::tuple<T1Iter, T2Iter> IterTuple; |
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| 384 | IterTuple it; |
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| 385 | iterator( T1Iter i1, T2Iter i2 ) : it( i1, i2 ) {} |
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| 386 | iterator operator++() { |
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| 387 | return iterator( ++std::get<0>(it), ++std::get<1>(it) ); |
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| 388 | } |
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| 389 | bool operator!=( const iterator &other ) const { return it != other.it; } |
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[55a68c3] | 390 | value_type operator*() const { return std::tie( *std::get<0>(it), *std::get<1>(it) ); } |
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[4a9ccc3] | 391 | }; |
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[50377a4] | 392 | |
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[4a9ccc3] | 393 | iterator begin() { return iterator( std::get<0>(args).begin(), std::get<1>(args).begin() ); } |
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| 394 | iterator end() { return iterator( std::get<0>(args).end(), std::get<1>(args).end() ); } |
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| 395 | }; |
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| 396 | |
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[6d267ca] | 397 | /// performs bounds check to ensure that all arguments are of the same length. |
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[4a9ccc3] | 398 | template< typename... Args > |
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[55a68c3] | 399 | group_iterate_t<Args...> group_iterate( Args &&... args ) { |
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[6d267ca] | 400 | return group_iterate_t<Args...>(false, std::forward<Args>( args )...); |
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| 401 | } |
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| 402 | |
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| 403 | /// does not perform a bounds check - requires user to ensure that iteration terminates when appropriate. |
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| 404 | template< typename... Args > |
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| 405 | group_iterate_t<Args...> unsafe_group_iterate( Args &&... args ) { |
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| 406 | return group_iterate_t<Args...>(true, std::forward<Args>( args )...); |
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[4a9ccc3] | 407 | } |
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[294647b] | 408 | |
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[108f3cdb] | 409 | // ----------------------------------------------------------------------------- |
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| 410 | // Helper struct and function to support |
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| 411 | // for ( val : lazy_map( container1, f ) ) {} |
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| 412 | // syntax to have a for each that iterates a container, mapping each element by applying f |
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| 413 | template< typename T, typename Func > |
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| 414 | struct lambda_iterate_t { |
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[4639b0d] | 415 | const T & ref; |
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| 416 | std::function<Func> f; |
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[108f3cdb] | 417 | |
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| 418 | struct iterator { |
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| 419 | typedef decltype(begin(ref)) Iter; |
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| 420 | Iter it; |
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[4639b0d] | 421 | std::function<Func> f; |
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| 422 | iterator( Iter it, std::function<Func> f ) : it(it), f(f) {} |
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[108f3cdb] | 423 | iterator & operator++() { |
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| 424 | ++it; return *this; |
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| 425 | } |
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| 426 | bool operator!=( const iterator &other ) const { return it != other.it; } |
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| 427 | auto operator*() const -> decltype(f(*it)) { return f(*it); } |
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| 428 | }; |
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| 429 | |
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[4639b0d] | 430 | lambda_iterate_t( const T & ref, std::function<Func> f ) : ref(ref), f(f) {} |
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[108f3cdb] | 431 | |
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| 432 | auto begin() const -> decltype(iterator(std::begin(ref), f)) { return iterator(std::begin(ref), f); } |
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| 433 | auto end() const -> decltype(iterator(std::end(ref), f)) { return iterator(std::end(ref), f); } |
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| 434 | }; |
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| 435 | |
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| 436 | template< typename... Args > |
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[4639b0d] | 437 | lambda_iterate_t<Args...> lazy_map( const Args &... args ) { |
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| 438 | return lambda_iterate_t<Args...>( args...); |
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[108f3cdb] | 439 | } |
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| 440 | |
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[9dc31c10] | 441 | // ----------------------------------------------------------------------------- |
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[f14d956] | 442 | // O(1) polymorphic integer ilog2, using clz, which returns the number of leading 0-bits, starting at the most |
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[9dc31c10] | 443 | // significant bit (single instruction on x86) |
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| 444 | |
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| 445 | template<typename T> |
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[d28a03e] | 446 | inline |
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[b6d7f44] | 447 | #if defined(__GNUC__) && __GNUC__ > 4 |
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[d28a03e] | 448 | constexpr |
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| 449 | #endif |
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| 450 | T ilog2(const T & t) { |
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| 451 | if(std::is_integral<T>::value) { |
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[9dc31c10] | 452 | const constexpr int r = sizeof(t) * __CHAR_BIT__ - 1; |
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[d28a03e] | 453 | if( sizeof(T) == sizeof(unsigned int) ) return r - __builtin_clz ( t ); |
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| 454 | if( sizeof(T) == sizeof(unsigned long) ) return r - __builtin_clzl ( t ); |
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| 455 | if( sizeof(T) == sizeof(unsigned long long) ) return r - __builtin_clzll( t ); |
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| 456 | } |
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| 457 | assert(false); |
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[9dc31c10] | 458 | return -1; |
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[01b8ccf1] | 459 | } // ilog2 |
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[108f3cdb] | 460 | |
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[5cbacf1] | 461 | // ----------------------------------------------------------------------------- |
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| 462 | /// evaluates expr as a long long int. If second is false, expr could not be evaluated |
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| 463 | std::pair<long long int, bool> eval(Expression * expr); |
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[108f3cdb] | 464 | |
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[fbecee5] | 465 | // ----------------------------------------------------------------------------- |
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| 466 | /// Reorders the input range in-place so that the minimal-value elements according to the |
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| 467 | /// comparator are in front; |
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| 468 | /// returns the iterator after the last minimal-value element. |
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| 469 | template<typename Iter, typename Compare> |
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| 470 | Iter sort_mins( Iter begin, Iter end, Compare& lt ) { |
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| 471 | if ( begin == end ) return end; |
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| 472 | |
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| 473 | Iter min_pos = begin; |
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| 474 | for ( Iter i = begin + 1; i != end; ++i ) { |
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| 475 | if ( lt( *i, *min_pos ) ) { |
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| 476 | // new minimum cost; swap into first position |
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| 477 | min_pos = begin; |
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| 478 | std::iter_swap( min_pos, i ); |
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| 479 | } else if ( ! lt( *min_pos, *i ) ) { |
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| 480 | // duplicate minimum cost; swap into next minimum position |
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| 481 | ++min_pos; |
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| 482 | std::iter_swap( min_pos, i ); |
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| 483 | } |
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| 484 | } |
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| 485 | return ++min_pos; |
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| 486 | } |
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| 487 | |
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| 488 | template<typename Iter, typename Compare> |
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| 489 | inline Iter sort_mins( Iter begin, Iter end, Compare&& lt ) { |
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| 490 | return sort_mins( begin, end, lt ); |
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| 491 | } |
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| 492 | |
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| 493 | /// sort_mins defaulted to use std::less |
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| 494 | template<typename Iter> |
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| 495 | inline Iter sort_mins( Iter begin, Iter end ) { |
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| 496 | return sort_mins( begin, end, std::less<typename std::iterator_traits<Iter>::value_type>{} ); |
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| 497 | } |
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| 498 | |
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[51587aa] | 499 | // Local Variables: // |
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| 500 | // tab-width: 4 // |
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| 501 | // mode: c++ // |
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| 502 | // compile-command: "make install" // |
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| 503 | // End: // |
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