]> git.ipfire.org Git - thirdparty/squid.git/blame - src/Generic.h
Cleanup: un-wrap C++ header includes
[thirdparty/squid.git] / src / Generic.h
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742cce19 1/*
742cce19 2 *
3 * SQUID Web Proxy Cache http://www.squid-cache.org/
4 * ----------------------------------------------------------
5 *
6 * Squid is the result of efforts by numerous individuals from
7 * the Internet community; see the CONTRIBUTORS file for full
8 * details. Many organizations have provided support for Squid's
9 * development; see the SPONSORS file for full details. Squid is
10 * Copyrighted (C) 2001 by the Regents of the University of
11 * California; see the COPYRIGHT file for full details. Squid
12 * incorporates software developed and/or copyrighted by other
13 * sources; see the CREDITS file for full details.
14 *
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
26ac0430 19 *
742cce19 20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
26ac0430 24 *
742cce19 25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
28 *
29 */
742cce19 30#ifndef SQUID_GENERIC_H
31#define SQUID_GENERIC_H
32
e1f7507e 33#include "dlink.h"
62e76326 34
27e059d4 35#include <ostream>
27e059d4 36
e1f7507e 37template <class _Arg, class _Result>
26ac0430 38struct unary_function {
742cce19 39 typedef _Arg argument_type;
40 typedef _Result result_type;
41};
42
43template <class L, class T>
44T& for_each(L const &head, T& visitor)
45{
46 for (L const *node = &head; node; node=node->next)
62e76326 47 visitor(*node);
48
742cce19 49 return visitor;
50}
51
742cce19 52template <class T>
53T& for_each(dlink_list const &collection, T& visitor)
54{
55 for (dlink_node const *node = collection.head; node; node=node->next)
62e76326 56 visitor(*(typename T::argument_type const *)node->data);
57
742cce19 58 return visitor;
59}
60
b9ae18aa 61/* RBC 20030718 - use this to provide instance expecting classes a pointer to a
62 * singleton
63 */
64
65template <class C>
b9ae18aa 66class InstanceToSingletonAdapter : public C
67{
68
69public:
70 void *operator new (size_t byteCount) { return ::operator new (byteCount);}
71
72 void operator delete (void *address) { ::operator delete (address);}
73
74 InstanceToSingletonAdapter(C const *instance) : theInstance (instance) {}
75
76 C const * operator-> () const {return theInstance; }
77
78 C * operator-> () {return const_cast<C *>(theInstance); }
79
80 C const & operator * () const {return *theInstance; }
81
82 C & operator * () {return *const_cast<C *>(theInstance); }
83
84 operator C const * () const {return theInstance;}
85
86 operator C *() {return const_cast<C *>(theInstance);}
87
88private:
89 C const *theInstance;
90};
91
b8bad68c 92template <class InputIterator , class Visitor>
93Visitor& for_each(InputIterator from, InputIterator to, Visitor& visitor)
94{
95 while (!(from == to)) {
96 typename InputIterator::value_type &value = *from;
97 ++from;
98 visitor(value);
99 }
100
101 return visitor;
102}
103
104/* generic ostream printer */
105template <class Pointer>
26ac0430 106struct PointerPrinter {
b8bad68c 107 PointerPrinter(std::ostream &astream, std::string aDelimiter) : os(astream), delimiter (aDelimiter) {}
108
26ac0430 109 void operator () (Pointer aNode) {
b8bad68c 110 os << *aNode << delimiter;
111 }
112
113 std::ostream &os;
114 std::string delimiter;
115};
116
742cce19 117#endif /* SQUID_GENERIC_H */