mirror of
https://github.com/libretro/scummvm.git
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86 lines
2.5 KiB
C++
86 lines
2.5 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef COMMON_HASH_STR_H
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#define COMMON_HASH_STR_H
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#include "common/hashmap.h"
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#include "common/str.h"
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namespace Common {
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uint hashit(const char *str);
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uint hashit_lower(const char *str); // Generate a hash based on the lowercase version of the string
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inline uint hashit_lower(const String &str) { return hashit_lower(str.c_str()); }
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// FIXME: The following functors obviously are not consistently named
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struct CaseSensitiveString_EqualTo {
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bool operator()(const String& x, const String& y) const { return x.equals(y); }
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};
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struct CaseSensitiveString_Hash {
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uint operator()(const String& x) const { return x.hash(); }
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};
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struct IgnoreCase_EqualTo {
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bool operator()(const String& x, const String& y) const { return x.equalsIgnoreCase(y); }
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};
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struct IgnoreCase_Hash {
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uint operator()(const String& x) const { return hashit_lower(x.c_str()); }
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};
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// Specalization of the Hash functor for String objects.
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// We do case sensitve hashing here, because that is what
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// the default EqualTo is compatible with. If one wants to use
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// case insensitve hashing, then only because one wants to use
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// IgnoreCase_EqualTo, and then one has to specify a custom
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// hash anyway.
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template<>
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struct Hash<String> {
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uint operator()(const String& s) const {
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return s.hash();
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}
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};
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template<>
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struct Hash<U32String> {
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uint operator()(const U32String& s) const {
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return s.hash();
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}
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};
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template<>
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struct Hash<const char *> {
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uint operator()(const char *s) const {
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return hashit(s);
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}
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};
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// String map -- by default case insensitive
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typedef HashMap<String, String, IgnoreCase_Hash, IgnoreCase_EqualTo> StringMap;
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} // End of namespace Common
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#endif
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