[51b7345] | 1 | /* |
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| 2 | * This file is part of the Cforall project |
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| 3 | * |
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| 4 | * Some useful template utility functions |
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| 5 | * |
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| 6 | * $Id: utility.h,v 1.17 2003/11/26 18:05:21 rgesteve Exp $ |
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| 7 | * |
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| 8 | */ |
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| 9 | |
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| 10 | #ifndef COMMON_UTILITY_H |
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| 11 | #define COMMON_UTILITY_H |
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| 12 | |
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| 13 | #include <iostream> |
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| 14 | #include <strstream> |
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| 15 | #include <iterator> |
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| 16 | #include <string> |
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| 17 | #include <cctype> |
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| 18 | #include <list> |
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| 19 | |
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| 20 | template< typename T > |
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| 21 | static inline T* |
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| 22 | maybeClone( const T *orig ) |
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| 23 | { |
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| 24 | if( orig ) { |
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| 25 | return orig->clone(); |
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| 26 | } else { |
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| 27 | return 0; |
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| 28 | } |
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| 29 | } |
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| 30 | |
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| 31 | template< typename T, typename U > |
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| 32 | static inline T* |
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| 33 | maybeBuild( const U *orig ) |
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| 34 | { |
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| 35 | if( orig ) { |
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| 36 | return orig->build(); |
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| 37 | } else { |
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| 38 | return 0; |
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| 39 | } |
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| 40 | } |
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| 41 | |
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| 42 | template< typename Input_iterator > |
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| 43 | void |
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| 44 | printEnums( Input_iterator begin, Input_iterator end, const char * const *name_array, std::ostream &os ) |
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| 45 | { |
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| 46 | for( Input_iterator i = begin; i != end; ++i ) { |
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| 47 | os << name_array[ *i ] << ' '; |
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| 48 | } |
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| 49 | } |
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| 50 | |
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| 51 | template< typename Container > |
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| 52 | void |
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| 53 | deleteAll( Container &container ) |
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| 54 | { |
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| 55 | for( typename Container::iterator i = container.begin(); i != container.end(); ++i ) { |
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| 56 | delete *i; |
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| 57 | } |
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| 58 | } |
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| 59 | |
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| 60 | template< typename Container > |
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| 61 | void |
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| 62 | printAll( const Container &container, std::ostream &os, int indent = 0 ) |
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| 63 | { |
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| 64 | for( typename Container::const_iterator i = container.begin(); i != container.end(); ++i ) { |
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| 65 | if( *i ) { |
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| 66 | os << std::string(indent, ' '); |
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| 67 | (*i)->print( os, indent + 2 ); |
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| 68 | os << std::endl; |
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| 69 | } |
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| 70 | } |
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| 71 | } |
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| 72 | |
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| 73 | template< typename SrcContainer, typename DestContainer > |
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| 74 | void |
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| 75 | cloneAll( const SrcContainer &src, DestContainer &dest ) |
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| 76 | { |
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| 77 | typename SrcContainer::const_iterator in = src.begin(); |
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| 78 | std::back_insert_iterator< DestContainer > out( dest ); |
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| 79 | while( in != src.end() ) { |
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| 80 | *out++ = (*in++)->clone(); |
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| 81 | } |
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| 82 | } |
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| 83 | |
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| 84 | template< typename Container > |
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| 85 | void |
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| 86 | assertAll( const Container &container ) |
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| 87 | { |
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| 88 | int count = 0; |
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| 89 | for( typename Container::const_iterator i = container.begin(); i != container.end(); ++i ) { |
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| 90 | if( !(*i) ) { |
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| 91 | std::cerr << count << " is null" << std::endl; |
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| 92 | } |
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| 93 | } |
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| 94 | } |
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| 95 | |
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| 96 | static inline std::string |
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| 97 | assign_strptr( std::string *str ) |
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| 98 | { |
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| 99 | if( str == 0 ) { |
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| 100 | return ""; |
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| 101 | } else { |
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| 102 | std::string tmp; |
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| 103 | tmp = *str; |
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| 104 | delete str; |
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| 105 | return tmp; |
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| 106 | } |
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| 107 | } |
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| 108 | |
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| 109 | template< class T, typename ResultType, ResultType (T::* memfunc)() > |
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| 110 | ResultType dispatch(T *pT){ |
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| 111 | return (pT->*memfunc)(); |
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| 112 | } |
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| 113 | |
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| 114 | template < typename T > |
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| 115 | std::list<T> tail( std::list<T> l ) |
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| 116 | { |
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| 117 | if(! l.empty()){ |
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| 118 | std::list<T> ret(++(l.begin()), l.end()); |
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| 119 | return ret; |
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| 120 | } |
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| 121 | } |
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| 122 | |
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| 123 | template < typename T > |
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| 124 | std::list<T> flatten( std::list < std::list<T> > l) { |
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| 125 | typedef std::list <T> Ts; |
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| 126 | |
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| 127 | Ts ret; |
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| 128 | |
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| 129 | switch( l.size() ){ |
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| 130 | case 0: |
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| 131 | return ret; |
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| 132 | case 1: |
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| 133 | return l.front(); |
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| 134 | default: |
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| 135 | ret = flatten(tail(l)); |
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| 136 | ret.insert(ret.begin(), l.front().begin(), l.front().end()); |
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| 137 | return ret; |
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| 138 | } |
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| 139 | } |
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| 140 | |
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| 141 | template < typename T > |
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| 142 | std::string toString ( T value ) { |
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| 143 | std::ostrstream os; |
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| 144 | |
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| 145 | os << value; // << std::ends; |
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| 146 | os.freeze( false ); |
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| 147 | |
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| 148 | return std::string(os.str(), os.pcount()); |
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| 149 | } |
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| 150 | |
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| 151 | template< class Constructed, typename Arg > |
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| 152 | Constructed *ctor( Arg arg ) { |
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| 153 | Constructed *c = new Constructed( arg ); |
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| 154 | return c; |
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| 155 | } |
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| 156 | |
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| 157 | template< class Constructed, typename Arg > |
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| 158 | Constructed ctor_noptr( Arg arg ) { |
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| 159 | return Constructed( arg ); |
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| 160 | } |
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| 161 | |
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| 162 | template< typename T > |
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| 163 | void replace( std::list< T > &org, typename std::list< T >::iterator pos, std::list< T > &with ) { |
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| 164 | // TIter should secretly be a typename std::list< T >::iterator |
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| 165 | // ( g++ 3.2 issues a 'is implicitly a typename' warning if I make this explicit ) |
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| 166 | typename std::list< T >::iterator next = pos; advance( next, 1 ); |
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| 167 | |
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| 168 | //if ( next != org.end() ) { |
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| 169 | org.erase( pos ); |
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| 170 | org.splice( next, with ); |
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| 171 | //} |
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| 172 | |
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| 173 | return; |
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| 174 | } |
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| 175 | |
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| 176 | template< typename T1, typename T2 > |
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| 177 | T2 *cast_ptr( T1 *from ) { |
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| 178 | return dynamic_cast< T2 * >( from ); |
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| 179 | } |
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| 180 | |
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| 181 | template< class Exception, typename Arg > |
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| 182 | void inline assert_throw( bool pred, Arg arg ) { |
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| 183 | if (pred) throw Exception( arg ); |
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| 184 | } |
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| 185 | |
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| 186 | template< typename T > |
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| 187 | struct is_null_pointer { |
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| 188 | bool operator()( const T *ptr ){ return ( ptr == 0 ); } |
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| 189 | }; |
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| 190 | |
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| 191 | template< class InputIterator, class OutputIterator, class Predicate > |
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| 192 | void filter(InputIterator begin, InputIterator end, OutputIterator out, Predicate pred) |
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| 193 | { |
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| 194 | while ( begin++ != end ) |
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| 195 | if( pred(*begin) ) *out++ = *begin; |
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| 196 | |
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| 197 | return; |
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| 198 | } |
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| 199 | |
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| 200 | template< class InputIterator1, class InputIterator2, class OutputIterator > |
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| 201 | void zip( InputIterator1 b1, InputIterator1 e1, InputIterator2 b2, InputIterator2 e2, OutputIterator out ) { |
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| 202 | while( b1 != e1 && b2 != e2 ) |
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| 203 | *out++ = std::pair<typename InputIterator1::value_type, typename InputIterator2::value_type>(*b1++, *b2++); |
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| 204 | } |
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| 205 | |
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| 206 | template< class InputIterator1, class InputIterator2, class OutputIterator, class BinFunction > |
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| 207 | void zipWith( InputIterator1 b1, InputIterator1 e1, InputIterator2 b2, InputIterator2 e2, OutputIterator out, BinFunction func ) { |
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| 208 | while( b1 != e1 && b2 != e2 ) |
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| 209 | *out++ = func(*b1++, *b2++); |
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| 210 | } |
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| 211 | |
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| 212 | #endif /* #ifndef COMMON_UTILITY_H */ |
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| 213 | |
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| 214 | /* |
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| 215 | Local Variables: |
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| 216 | mode: c++ |
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| 217 | End: |
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| 218 | */ |
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