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common: drop remaining of HashMap 

Ryan Houdek removes all use of this code.

Let's remove the left-overs too, beside it will removes the sparsehash depencency
This commit is contained in:
Gregory Hainaut 2014-07-20 17:00:58 +02:00
parent 38f617233d
commit 6485bd89d9
3 changed files with 0 additions and 342 deletions
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329
common/include/Utilities/HashMap.h
View File

@ -15,157 +15,10 @@
#pragma once
// They move include file in version 2.0.2 of google sparsehash...
#ifdef SPARSEHASH_NEW_INCLUDE_DIR
#include <sparsehash/type_traits.h>
#include <sparsehash/dense_hash_set>
#include <sparsehash/dense_hash_map>
#include <sparsehash/internal/densehashtable.h>
#else
#include <google/type_traits.h>
#include <google/dense_hash_set>
#include <google/dense_hash_map>
#include <google/sparsehash/densehashtable.h>
#endif
#include <wx/string.h>
namespace HashTools {
#define HashFriend(Key,T) friend class HashMap<Key,T>
/// Defines an equality comparison unary method.
/// Generally intended for internal use only.
#define _EQUALS_UNARY_OP( Type ) bool operator()(const Type s1, const Type s2) const { return s1.Equals( s2 ); }
/// Defines a hash code unary method
/// Generally intended for internal use only.
#define _HASHCODE_UNARY_OP( Type ) hash_key_t operator()( const Type& val ) const { return val.GetHashCode(); }
/// <summary>
/// Defines an equality comparison method within an encapsulating struct, using the 'unary method' approach.
/// </summary>
/// <remarks>
/// <para>
/// This macro is a shortcut helper to implementing types usable as keys in <see cref="HashMap"/>s.
/// Normally you will want to use <see cref="DEFINE_HASH_API"/> instead as it defines both
/// the HashCode predicate and Compare predicate.
/// </para>
/// The code generated by this macro is equivalent to this:
/// <code>
/// // where 'Type' is the parameter used in the macro.
/// struct UnaryEquals
/// {
/// bool operator()(const Type s1, const Type s2) const
/// {
/// return s1.Equals( s2 ); // this operator must be implemented by the user.
/// }
/// };
/// </code>
/// Note:
/// In C++, the term 'unary method' refers to a method that is implemented as an overload of the
/// <c>operator ()</c>, such that the object instance itself acts as a method.
/// Note:
/// This methodology is similar to C# / .NET's <c>object.Equals()</c> method: The class member method
/// implementation of <c>Equals</c> should *not* throw exceptions -- it should instead return <c>false</c>
/// if either side of the comparison is not a matching type. See <see cref="IHashable" /> for details.
/// Note:
/// The reason for this (perhaps seemingly) hogwash red tape is because you can define custom
/// equality behavior for individual hashmaps, which are independent of the type used. The only
/// obvious scenario where such a feature is useful is in
/// </remarks>
/// <seealso cref="DEFINE_HASHCODE_UNARY"/>
/// <seealso cref="DEFINE_HASH_API"/>
/// <seealso cref="IHashable"/>
/// <seealso cref="HashMap"/>
#define DEFINE_EQUALS_UNARY( Type ) struct UnaryEquals{ _EQUALS_UNARY_OP( Type ) }
/// <summary>
/// Defines a hash code predicate within an encapsulating struct; for use in hashable user datatypes
/// </summary>
/// <remarks>
/// <para>
/// This macro is a shortcut helper to implementing types usable as keys in <see cref="HashMap"/>s.
/// Normally you will want to use <see cref="DEFINE_HASH_API"/> instead as it defines both
/// the HashCode predicate and Compare predicate.
/// </para>
/// The code generated by this macro is equivalent to this:
/// <code>
/// // where 'Type' is the parameter used in the macro.
/// struct UnaryHashCode
/// {
/// hash_key_t operator()( const Type& val ) const
/// {
/// return val.GetHashCode(); // this member function must be implemented by the user.
/// }
/// };
/// </code>
/// </remarks>
/// <seealso cref="DEFINE_EQUALS_UNARY"/>
/// <seealso cref="DEFINE_HASH_API"/>
/// <seealso cref="IHashable"/>
/// <seealso cref="HashMap"/>
#define DEFINE_HASHCODE_UNARY( Type ) struct UnaryHashCode{ _HASHCODE_UNARY_OP( Type ) }
/// <summary>
/// Defines the API for hashcode and comparison unary methods; for use in hashable user datatypes
/// </summary>
/// <remarks>
/// This macro creates APIs that allow the class or struct to be used as a key in a <see cref="HashMap"/>.
/// It requires that the data type implement the following items:
/// * An equality test via an <c>operator==</c> overload.
/// * A public instance member method <c>GetHashCode.</c>
/// The code generated by this macro is equivalent to this:
/// <code>
/// // where 'Type' is the parameter used in the macro.
/// struct UnaryHashCode
/// {
/// hash_key_t operator()( const Type& val ) const
/// {
/// return val.GetHashCode(); // this member function must be implemented by the user.
/// }
/// };
///
/// struct UnaryEquals
/// {
/// bool operator()(const Type s1, const Type s2) const
/// {
/// return s1.Equals( s2 ); // this operator must be implemented by the user.
/// }
/// };
/// </code>
/// Note:
/// In C++, the term 'unary method' refers to a method that is implemented as an overload of the
/// <c>operator ()</c>, such that the object instance itself acts as a method.
/// Note:
/// For class types you can use the <see cref="IHashable"/> interface, which also allows you to group
/// multiple types of objects into a single complex HashMap.
/// Note:
/// Generally speaking, you do not use the <c>IHashable</c> interface on simple C-style structs, since it
/// would incur the overhead of a vtbl and could potentially break code that assumes the structs to have
/// 1-to-1 data-to-declaration coorlations.
/// Note:
/// Internally, using this macro is functionally equivalent to using both <see cref="DEFINE_HASHCODE_CLASS"/>
/// and <see cref="DEFINE_EQUALS_CLASS"/>.
/// </remarks>
/// <seealso cref="IHashable"/>
/// <seealso cref="DEFINE_HASHCODE_CLASS"/>
/// <seealso cref="DEFINE_COMPARE_CLASS"/>
/// <seealso cref="DEFINE_HASH_API"/>
/// <seealso cref="HashMap"/>
#define DEFINE_HASH_API( Type ) DEFINE_HASHCODE_UNARY( Type ); DEFINE_EQUALS_UNARY( Type );
/// <summary>
/// A helper macro for creating custom types that can be used as <see cref="HashMap" /> keys.
/// </summary>
/// <remarks>
/// Use of this macro is only needed if the hashable type in question is a struct that is a private
/// local to the namespace of a containing class.
/// </remarks>
#define PRIVATE_HASHMAP( Key, T ) \
typedef SpecializedHashMap<Key, T> Key##HashMap; \
friend Key##HashMap;
/// <summary>
/// Type that represents a hashcode; returned by all hash functions.
/// </summary>
@ -177,187 +30,5 @@ typedef u32 hash_key_t;
hash_key_t Hash(const char* data, int len);
struct CommonHashClass;
extern const CommonHashClass GetCommonHash;
/// <summary>
/// A unary-style set of methods for getting the hash code of C++ fundamental types.
/// </summary>
/// <remarks>
/// This class is used to pass hash functions into the <see cref="HashMap"/> class and
/// it's siblings. It houses methods for most of the fundamental types of C++ and the STL,
/// such as all int and float types, and also <c>std::string</c>. All functions can be
/// accessed via the () overload on an instance of the class, such as:
/// <code>
/// const CommonHashClass GetHash;
/// int v = 27;
/// std::string s = "Joe's World!";
/// hash_key_t hashV = GetHash( v );
/// hash_key_t hashS = GetHash( s );
/// </code>
/// Note:
/// In C++, the term 'unary method' refers to a method that is implemented as an overload of the
/// <c>operator ()</c>, such that the object instance itself acts as a method.
/// </remarks>
/// <seealso cref="GetCommonHash"/>
struct CommonHashClass
{
public:
// GCC needs empty constructors on const instances, because it likes pointlessness.
CommonHashClass() {}
hash_key_t DoInt( u32 val ) const
{
u32 key = val;
key = ~key + (key << 15);
key = key ^ (key >> 12);
key = key + (key << 2);
key = key ^ (key >> 4);
key = key * 2057;
key = key ^ (key >> 16);
return val;
}
hash_key_t operator()(const std::string& src) const
{
return Hash( src.data(), src.length() );
}
hash_key_t operator()( const std::wstring& src ) const
{
return Hash( (const char *)src.data(), src.length() * sizeof( wchar_t ) );
}
hash_key_t operator()( const wxString& src ) const
{
return Hash( (const char *)src.data(), src.length() * sizeof( wxChar ) );
}
// Returns a hashcode for a character.
// This has function has been optimized to return an even distribution
// across the range of an int value. In theory that should be more rewarding
// to hastable performance than a straight up char lookup.
hash_key_t operator()( const char c1 ) const
{
// Most chars contain values between 0 and 128, so let's mix it up a bit:
int cs = (int)( c1 + (char)64 );
return ( cs + ( cs<<8 ) + ( cs << 16 ) + (cs << 24 ) );
}
hash_key_t operator()( const wchar_t wc1 ) const
{
// Most unicode values are between 0 and 128, with 0-1024
// making up the bulk of the rest. Everything else is spatially used.
/*int wcs = (int) ( wc1 + 0x2000 );
return wcs ^ ( wcs + 0x19000 );*/
// or maybe I'll just feed it into the int hash:
return GetCommonHash( (u32)wc1 );
}
/// <summary>
/// Gets the hash code for a 32 bit integer.
/// </summary>
/// <remarks>
/// This method performs a very fast algorithm optimized for typical integral
/// dispersion patterns (which tend to favor a bit heavy on the lower-range of values while
/// leaving the extremes un-used).
/// Note:
/// Implementation is based on an article found here: http://www.concentric.net/~Ttwang/tech/inthash.htm
/// </remarks>
hash_key_t operator()( const u32 val ) const
{
return DoInt(val);
}
/// <summary>
/// Gets the hash code for a 32 bit integer.
/// </summary>
/// <remarks>
/// This method performs a very fast algorithm optimized for typical integral
/// dispersion patterns (which tend to favor a bit heavy on the lower-range of values while
/// leaving the extremes un-used).
/// Note:
/// Implementation is based on an article found here: http://www.concentric.net/~Ttwang/tech/inthash.htm
/// </remarks>
hash_key_t operator()( const s32 val ) const
{
return DoInt(val);
}
/// <summary>
/// Gets the hash code for a 64 bit integer.
/// </summary>
/// <remarks>
/// This method performs a very fast algorithm optimized for typical integral
/// dispersion patterns (which tend to favor a bit heavy on the lower-range of values while
/// leaving the extremes un-used).
/// Note:
/// Implementation is based on an article found here: http://www.concentric.net/~Ttwang/tech/inthash.htm
/// </remarks>
hash_key_t operator()( const u64 val ) const
{
u64 key = val;
key = (~key) + (key << 18);
key = key ^ (key >> 31);
key = key * 21; // key = (key + (key << 2)) + (key << 4);
key = key ^ (key >> 11);
key = key + (key << 6);
key = key ^ (key >> 22);
return (u32) key;
}
/// <summary>
/// Gets the hash code for a 64 bit integer.
/// </summary>
/// <remarks>
/// This method performs a very fast algorithm optimized for typical integral
/// dispersion patterns (which tend to favor a bit heavy on the lower-range of values while
/// leaving the extremes un-used).
/// Note:
/// Implementation is based on an article found here: http://www.concentric.net/~Ttwang/tech/inthash.htm
/// </remarks>
hash_key_t operator()( const s64 val ) const
{
return GetCommonHash((u64)val);
}
hash_key_t operator()( const float val ) const
{
// floats do a fine enough job of being scattered about
// the universe:
return *((hash_key_t *)&val);
}
hash_key_t operator()( const double val ) const
{
// doubles have to be compressed into a 32 bit value:
return GetCommonHash( *((u64*)&val) );
}
/// <summary>
/// Calculates the hash of a pointer.
/// </summary>
/// <remarks>
/// This method has been optimized to give typical 32 bit pointers a reasonably
/// wide spread across the integer spectrum.
/// Note:
/// This method is optimized for 32 bit pointers only.
/// 64 bit pointer support is implemented but not optimized.
/// </remarks>
hash_key_t operator()( const void* addr ) const
{
#ifdef _ARCH_64
return GetCommonHash((u64)addr);
#else
hash_key_t key = (hash_key_t) addr;
return (hash_key_t)((key >> 3) * 2654435761ul);
#endif
}
};
}

11
common/src/Utilities/HashTools.cpp
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@ -18,17 +18,6 @@
namespace HashTools {
/// <summary>
/// Provides access to a set of common hash methods for C fundamental types.
/// </summary>
/// <remarks>
/// The CommonHashClass is implemented using the () operator (sometimes referred to
/// as a predicate), which means that an instance of <see cref="CommonHashClass" />
/// is required to use the methods. This public global variable provides that instance.
/// </remarks>
/// <seealso cref="CommonHashClass"/>
const CommonHashClass GetCommonHash;
#define get16bits(d) (*((const u16 *) (d)))
/// <summary>

2
pcsx2/gui/GlobalCommands.cpp
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@ -30,8 +30,6 @@
#include "DebugTools/Debug.h"
#include "R3000A.h"
using namespace HashTools;
// renderswitch - tells GSdx to go into dx9 sw if "renderswitch" is set.
bool renderswitch = false;