520 lines
22 KiB
C++
520 lines
22 KiB
C++
//========= Copyright <20> 1996-2005, Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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// $NoKeywords: $
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//=============================================================================//
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#ifndef KEYVALUES_H
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#define KEYVALUES_H
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#ifdef _WIN32
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#pragma once
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#endif
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#ifndef NULL
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#ifdef __cplusplus
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#define NULL 0
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#else
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#define NULL ((void *)0)
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#endif
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#endif
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#include "utlvector.h"
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#include "color.h"
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#include "exprevaluator.h"
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#define FOR_EACH_SUBKEY( kvRoot, kvSubKey ) \
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for ( KeyValues * kvSubKey = kvRoot->GetFirstSubKey(); kvSubKey != NULL; kvSubKey = kvSubKey->GetNextKey() )
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#define FOR_EACH_TRUE_SUBKEY( kvRoot, kvSubKey ) \
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for ( KeyValues * kvSubKey = kvRoot->GetFirstTrueSubKey(); kvSubKey != NULL; kvSubKey = kvSubKey->GetNextTrueSubKey() )
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#define FOR_EACH_VALUE( kvRoot, kvValue ) \
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for ( KeyValues * kvValue = kvRoot->GetFirstValue(); kvValue != NULL; kvValue = kvValue->GetNextValue() )
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class IBaseFileSystem;
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class CUtlBuffer;
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class Color;
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class KeyValues;
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class IKeyValuesDumpContext;
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typedef void * FileHandle_t;
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class CKeyValuesGrowableStringTable;
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// single byte identifies a xbox kv file in binary format
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// strings are pooled from a searchpath/zip mounted symbol table
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#define KV_BINARY_POOLED_FORMAT 0xAA
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#define FOR_EACH_SUBKEY( kvRoot, kvSubKey ) \
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for ( KeyValues * kvSubKey = kvRoot->GetFirstSubKey(); kvSubKey != NULL; kvSubKey = kvSubKey->GetNextKey() )
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#define FOR_EACH_TRUE_SUBKEY( kvRoot, kvSubKey ) \
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for ( KeyValues * kvSubKey = kvRoot->GetFirstTrueSubKey(); kvSubKey != NULL; kvSubKey = kvSubKey->GetNextTrueSubKey() )
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#define FOR_EACH_VALUE( kvRoot, kvValue ) \
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for ( KeyValues * kvValue = kvRoot->GetFirstValue(); kvValue != NULL; kvValue = kvValue->GetNextValue() )
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//-----------------------------------------------------------------------------
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// Purpose: Simple recursive data access class
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// Used in vgui for message parameters and resource files
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// Destructor deletes all child KeyValues nodes
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// Data is stored in key (string names) - (string/int/float)value pairs called nodes.
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//
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// About KeyValues Text File Format:
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// It has 3 control characters '{', '}' and '"'. Names and values may be quoted or
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// not. The quote '"' character must not be used within name or values, only for
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// quoting whole tokens. You may use escape sequences wile parsing and add within a
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// quoted token a \" to add quotes within your name or token. When using Escape
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// Sequence the parser must now that by setting KeyValues::UsesEscapeSequences( true ),
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// which it's off by default. Non-quoted tokens ends with a whitespace, '{', '}' and '"'.
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// So you may use '{' and '}' within quoted tokens, but not for non-quoted tokens.
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// An open bracket '{' after a key name indicates a list of subkeys which is finished
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// with a closing bracket '}'. Subkeys use the same definitions recursively.
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// Whitespaces are space, return, newline and tabulator. Allowed Escape sequences
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// are \n, \t, \\, \n and \". The number character '#' is used for macro purposes
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// (eg #include), don't use it as first character in key names.
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//-----------------------------------------------------------------------------
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class KeyValues
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{
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public:
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// By default, the KeyValues class uses a string table for the key names that is
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// limited to 4MB. The game will exit in error if this space is exhausted. In
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// general this is preferable for game code for performance and memory fragmentation
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// reasons.
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//
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// If this is not acceptable, you can use this call to switch to a table that can grow
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// arbitrarily. This call must be made before any KeyValues objects are allocated or it
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// will result in undefined behavior. If you use the growable string table, you cannot
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// share KeyValues pointers directly with any other module. You can serialize them across
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// module boundaries. These limitations are acceptable in the Steam backend code
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// this option was written for, but may not be in other situations. Make sure to
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// understand the implications before using this.
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static void SetUseGrowableStringTable( bool bUseGrowableTable );
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explicit KeyValues( const char *setName );
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//
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// AutoDelete class to automatically free the keyvalues.
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// Simply construct it with the keyvalues you allocated and it will free them when falls out of scope.
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// When you decide that keyvalues shouldn't be deleted call Assign(NULL) on it.
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// If you constructed AutoDelete(NULL) you can later assign the keyvalues to be deleted with Assign(pKeyValues).
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//
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class AutoDelete
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{
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public:
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explicit inline AutoDelete( KeyValues *pKeyValues ) : m_pKeyValues( pKeyValues ) {}
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explicit inline AutoDelete( const char *pchKVName ) : m_pKeyValues( new KeyValues( pchKVName ) ) {}
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inline ~AutoDelete( void ) { if( m_pKeyValues ) m_pKeyValues->deleteThis(); }
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inline void Assign( KeyValues *pKeyValues ) { m_pKeyValues = pKeyValues; }
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KeyValues *operator->() { return m_pKeyValues; }
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operator KeyValues *() { return m_pKeyValues; }
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private:
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AutoDelete( AutoDelete const &x ); // forbid
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AutoDelete & operator= ( AutoDelete const &x ); // forbid
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protected:
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KeyValues *m_pKeyValues;
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};
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//
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// AutoDeleteInline is useful when you want to hold your keyvalues object inside
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// and delete it right after using.
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// You can also pass temporary KeyValues object as an argument to a function by wrapping it into KeyValues::AutoDeleteInline
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// instance: call_my_function( KeyValues::AutoDeleteInline( new KeyValues( "test" ) ) )
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//
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class AutoDeleteInline : public AutoDelete
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{
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public:
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explicit inline AutoDeleteInline( KeyValues *pKeyValues ) : AutoDelete( pKeyValues ) {}
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inline operator KeyValues *() const { return m_pKeyValues; }
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inline KeyValues * Get() const { return m_pKeyValues; }
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};
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// Quick setup constructors
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KeyValues( const char *setName, const char *firstKey, const char *firstValue );
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KeyValues( const char *setName, const char *firstKey, const wchar_t *firstValue );
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KeyValues( const char *setName, const char *firstKey, int firstValue );
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KeyValues( const char *setName, const char *firstKey, const char *firstValue, const char *secondKey, const char *secondValue );
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KeyValues( const char *setName, const char *firstKey, int firstValue, const char *secondKey, int secondValue );
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// Section name
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const char *GetName() const;
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void SetName( const char *setName);
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// gets the name as a unique int
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int GetNameSymbol() const;
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int GetNameSymbolCaseSensitive() const;
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// File access. Set UsesEscapeSequences true, if resource file/buffer uses Escape Sequences (eg \n, \t)
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void UsesEscapeSequences(bool state); // default false
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bool LoadFromFile( IBaseFileSystem *filesystem, const char *resourceName, const char *pathID = NULL, GetSymbolProc_t pfnEvaluateSymbolProc = NULL);
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bool SaveToFile( IBaseFileSystem *filesystem, const char *resourceName, const char *pathID = NULL);
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// Read from a buffer... Note that the buffer must be null terminated
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bool LoadFromBuffer( char const *resourceName, const char *pBuffer, IBaseFileSystem* pFileSystem = NULL, const char *pPathID = NULL, GetSymbolProc_t pfnEvaluateSymbolProc = NULL );
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// Read from a utlbuffer...
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bool LoadFromBuffer( char const *resourceName, CUtlBuffer &buf, IBaseFileSystem* pFileSystem = NULL, const char *pPathID = NULL, GetSymbolProc_t pfnEvaluateSymbolProc = NULL );
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// Find a keyValue, create it if it is not found.
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// Set bCreate to true to create the key if it doesn't already exist (which ensures a valid pointer will be returned)
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KeyValues *FindKey(const char *keyName, bool bCreate = false);
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KeyValues *FindKey(int keySymbol) const;
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KeyValues *CreateNewKey(); // creates a new key, with an autogenerated name. name is guaranteed to be an integer, of value 1 higher than the highest other integer key name
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void AddSubKey( KeyValues *pSubkey ); // Adds a subkey. Make sure the subkey isn't a child of some other keyvalues
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void RemoveSubKey(KeyValues *subKey); // removes a subkey from the list, DOES NOT DELETE IT
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void InsertSubKey( int nIndex, KeyValues *pSubKey ); // Inserts the given sub-key before the Nth child location
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bool ContainsSubKey( KeyValues *pSubKey ); // Returns true if this key values contains the specified sub key, false otherwise.
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void SwapSubKey( KeyValues *pExistingSubKey, KeyValues *pNewSubKey ); // Swaps an existing subkey for a new one, DOES NOT DELETE THE OLD ONE but takes ownership of the new one
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void ElideSubKey( KeyValues *pSubKey ); // Removes a subkey but inserts all of its children in its place, in-order (flattens a tree, like firing a manager!)
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// Key iteration.
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//
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// NOTE: GetFirstSubKey/GetNextKey will iterate keys AND values. Use the functions
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// below if you want to iterate over just the keys or just the values.
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//
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KeyValues *GetFirstSubKey(); // returns the first subkey in the list
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KeyValues *GetNextKey(); // returns the next subkey
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void SetNextKey( KeyValues * pDat);
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//
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// These functions can be used to treat it like a true key/values tree instead of
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// confusing values with keys.
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//
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// So if you wanted to iterate all subkeys, then all values, it would look like this:
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// for ( KeyValues *pKey = pRoot->GetFirstTrueSubKey(); pKey; pKey = pKey->GetNextTrueSubKey() )
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// {
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// Msg( "Key name: %s\n", pKey->GetName() );
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// }
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// for ( KeyValues *pValue = pRoot->GetFirstValue(); pKey; pKey = pKey->GetNextValue() )
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// {
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// Msg( "Int value: %d\n", pValue->GetInt() ); // Assuming pValue->GetDataType() == TYPE_INT...
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// }
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KeyValues* GetFirstTrueSubKey();
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KeyValues* GetNextTrueSubKey();
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KeyValues* GetFirstValue(); // When you get a value back, you can use GetX and pass in NULL to get the value.
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KeyValues* GetNextValue();
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// Data access
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int GetInt( const char *keyName = NULL, int defaultValue = 0 );
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uint64 GetUint64( const char *keyName = NULL, uint64 defaultValue = 0 );
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float GetFloat( const char *keyName = NULL, float defaultValue = 0.0f );
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const char *GetString( const char *keyName = NULL, const char *defaultValue = "" );
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const wchar_t *GetWString( const char *keyName = NULL, const wchar_t *defaultValue = L"" );
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void *GetPtr( const char *keyName = NULL, void *defaultValue = (void*)0 );
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Color GetColor( const char *keyName = NULL , const Color &defaultColor = Color( 0, 0, 0, 0 ) );
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bool GetBool( const char *keyName = NULL, bool defaultValue = false ) { return GetInt( keyName, defaultValue ? 1 : 0 ) ? true : false; }
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bool IsEmpty(const char *keyName = NULL);
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// Data access
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int GetInt( int keySymbol, int defaultValue = 0 );
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uint64 GetUint64( int keySymbol, uint64 defaultValue = 0 );
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float GetFloat( int keySymbol, float defaultValue = 0.0f );
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const char *GetString( int keySymbol, const char *defaultValue = "" );
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const wchar_t *GetWString( int keySymbol, const wchar_t *defaultValue = L"" );
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void *GetPtr( int keySymbol, void *defaultValue = (void*)0 );
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Color GetColor( int keySymbol /* default value is all black */);
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bool GetBool( int keySymbol, bool defaultValue = false ) { return GetInt( keySymbol, defaultValue ? 1 : 0 ) ? true : false; }
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bool IsEmpty( int keySymbol );
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// Key writing
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void SetWString( const char *keyName, const wchar_t *value );
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void SetString( const char *keyName, const char *value );
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void SetInt( const char *keyName, int value );
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void SetUint64( const char *keyName, uint64 value );
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void SetFloat( const char *keyName, float value );
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void SetPtr( const char *keyName, void *value );
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void SetColor( const char *keyName, Color value);
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void SetBool( const char *keyName, bool value ) { SetInt( keyName, value ? 1 : 0 ); }
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// Memory allocation (optimized)
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void *operator new( size_t iAllocSize );
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void *operator new( size_t iAllocSize, int nBlockUse, const char *pFileName, int nLine );
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void operator delete( void *pMem );
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void operator delete( void *pMem, int nBlockUse, const char *pFileName, int nLine );
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KeyValues& operator=( KeyValues& src );
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// Adds a chain... if we don't find stuff in this keyvalue, we'll look
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// in the one we're chained to.
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void ChainKeyValue( KeyValues* pChain );
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void RecursiveSaveToFile( CUtlBuffer& buf, int indentLevel );
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bool WriteAsBinary( CUtlBuffer &buffer ) const;
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bool ReadAsBinary( CUtlBuffer &buffer );
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// Allocate & create a new copy of the keys
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KeyValues *MakeCopy( void ) const;
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// Make a new copy of all subkeys, add them all to the passed-in keyvalues
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void CopySubkeys( KeyValues *pParent ) const;
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// Clear out all subkeys, and the current value
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void Clear( void );
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// Data type
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enum types_t
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{
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TYPE_NONE = 0,
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TYPE_STRING,
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TYPE_INT,
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TYPE_FLOAT,
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TYPE_PTR,
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TYPE_WSTRING,
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TYPE_COLOR,
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TYPE_UINT64,
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TYPE_COMPILED_INT_BYTE, // hack to collapse 1 byte ints in the compiled format
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TYPE_COMPILED_INT_0, // hack to collapse 0 in the compiled format
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TYPE_COMPILED_INT_1, // hack to collapse 1 in the compiled format
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TYPE_NUMTYPES,
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};
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types_t GetDataType(const char *keyName = NULL);
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// Virtual deletion function - ensures that KeyValues object is deleted from correct heap
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void deleteThis();
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void SetStringValue( char const *strValue );
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// unpack a key values list into a structure
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void UnpackIntoStructure( struct KeyValuesUnpackStructure const *pUnpackTable, void *pDest );
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// Process conditional keys for widescreen support.
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bool ProcessResolutionKeys( const char *pResString );
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// Dump keyvalues recursively into a dump context
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bool Dump( IKeyValuesDumpContext *pDump, int nIndentLevel = 0 );
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// Merge operations describing how two keyvalues can be combined
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enum MergeKeyValuesOp_t
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{
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MERGE_KV_ALL,
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MERGE_KV_UPDATE, // update values are copied into storage, adding new keys to storage or updating existing ones
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MERGE_KV_DELETE, // update values specify keys that get deleted from storage
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MERGE_KV_BORROW, // update values only update existing keys in storage, keys in update that do not exist in storage are discarded
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};
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void MergeFrom( KeyValues *kvMerge, MergeKeyValuesOp_t eOp = MERGE_KV_ALL );
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// Assign keyvalues from a string
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static KeyValues * FromString( char const *szName, char const *szStringVal, char const **ppEndOfParse = NULL );
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protected:
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KeyValues( KeyValues& ); // prevent copy constructor being used
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// prevent delete being called except through deleteThis()
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~KeyValues();
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KeyValues* CreateKey( const char *keyName );
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void RecursiveCopyKeyValues( KeyValues& src );
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void RemoveEverything();
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// void RecursiveSaveToFile( IBaseFileSystem *filesystem, CUtlBuffer &buffer, int indentLevel );
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// void WriteConvertedString( CUtlBuffer &buffer, const char *pszString );
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// NOTE: If both filesystem and pBuf are non-null, it'll save to both of them.
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// If filesystem is null, it'll ignore f.
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void RecursiveSaveToFile( IBaseFileSystem *filesystem, FileHandle_t f, CUtlBuffer *pBuf, int indentLevel );
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void WriteConvertedString( IBaseFileSystem *filesystem, FileHandle_t f, CUtlBuffer *pBuf, const char *pszString );
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void RecursiveLoadFromBuffer( char const *resourceName, CUtlBuffer &buf, GetSymbolProc_t pfnEvaluateSymbolProc );
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// for handling #include "filename"
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void AppendIncludedKeys( CUtlVector< KeyValues * >& includedKeys );
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void ParseIncludedKeys( char const *resourceName, const char *filetoinclude,
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IBaseFileSystem* pFileSystem, const char *pPathID, CUtlVector< KeyValues * >& includedKeys, GetSymbolProc_t pfnEvaluateSymbolProc );
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// For handling #base "filename"
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void MergeBaseKeys( CUtlVector< KeyValues * >& baseKeys );
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void RecursiveMergeKeyValues( KeyValues *baseKV );
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// NOTE: If both filesystem and pBuf are non-null, it'll save to both of them.
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// If filesystem is null, it'll ignore f.
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void InternalWrite( IBaseFileSystem *filesystem, FileHandle_t f, CUtlBuffer *pBuf, const void *pData, int len );
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void Init();
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const char * ReadToken( CUtlBuffer &buf, bool &wasQuoted, bool &wasConditional );
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void WriteIndents( IBaseFileSystem *filesystem, FileHandle_t f, CUtlBuffer *pBuf, int indentLevel );
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void FreeAllocatedValue();
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void AllocateValueBlock(int size);
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bool ReadAsBinaryPooledFormat( CUtlBuffer &buf, IBaseFileSystem *pFileSystem, unsigned int poolKey, GetSymbolProc_t pfnEvaluateSymbolProc );
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bool EvaluateConditional( const char *pExpressionString, GetSymbolProc_t pfnEvaluateSymbolProc );
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uint32 m_iKeyName : 24; // keyname is a symbol defined in KeyValuesSystem
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uint32 m_iKeyNameCaseSensitive1 : 8; // 1st part of case sensitive symbol defined in KeyValueSystem
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// These are needed out of the union because the API returns string pointers
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char *m_sValue;
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wchar_t *m_wsValue;
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// we don't delete these
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union
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{
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int m_iValue;
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float m_flValue;
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void *m_pValue;
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unsigned char m_Color[4];
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};
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char m_iDataType;
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char m_bHasEscapeSequences; // true, if while parsing this KeyValue, Escape Sequences are used (default false)
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uint16 m_iKeyNameCaseSensitive2; // 2nd part of case sensitive symbol defined in KeyValueSystem;
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KeyValues *m_pPeer; // pointer to next key in list
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KeyValues *m_pSub; // pointer to Start of a new sub key list
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KeyValues *m_pChain;// Search here if it's not in our list
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GetSymbolProc_t m_pExpressionGetSymbolProc;
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private:
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// Statics to implement the optional growable string table
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// Function pointers that will determine which mode we are in
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static int (*s_pfGetSymbolForString)( const char *name, bool bCreate );
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static const char *(*s_pfGetStringForSymbol)( int symbol );
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static CKeyValuesGrowableStringTable *s_pGrowableStringTable;
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public:
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// Functions that invoke the default behavior
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static int GetSymbolForStringClassic( const char *name, bool bCreate = true );
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static const char *GetStringForSymbolClassic( int symbol );
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// Functions that use the growable string table
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static int GetSymbolForStringGrowable( const char *name, bool bCreate = true );
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static const char *GetStringForSymbolGrowable( int symbol );
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};
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typedef KeyValues::AutoDelete KeyValuesAD;
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enum KeyValuesUnpackDestinationTypes_t
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{
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UNPACK_TYPE_FLOAT, // dest is a float
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UNPACK_TYPE_VECTOR, // dest is a Vector
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UNPACK_TYPE_VECTOR_COLOR, // dest is a vector, src is a color
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UNPACK_TYPE_STRING, // dest is a char *. unpacker will allocate.
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UNPACK_TYPE_INT, // dest is an int
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UNPACK_TYPE_FOUR_FLOATS, // dest is an array of 4 floats. source is a string like "1 2 3 4"
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UNPACK_TYPE_TWO_FLOATS, // dest is an array of 2 floats. source is a string like "1 2"
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};
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#define UNPACK_FIXED( kname, kdefault, dtype, ofs ) { kname, kdefault, dtype, ofs, 0 }
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#define UNPACK_VARIABLE( kname, kdefault, dtype, ofs, sz ) { kname, kdefault, dtype, ofs, sz }
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#define UNPACK_END_MARKER { NULL, NULL, UNPACK_TYPE_FLOAT, 0 }
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struct KeyValuesUnpackStructure
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{
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char const *m_pKeyName; // null to terminate tbl
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char const *m_pKeyDefault; // null ok
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KeyValuesUnpackDestinationTypes_t m_eDataType; // UNPACK_TYPE_INT, ..
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size_t m_nFieldOffset; // use offsetof to set
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size_t m_nFieldSize; // for strings or other variable length
|
||
};
|
||
|
||
//-----------------------------------------------------------------------------
|
||
// inline methods
|
||
//-----------------------------------------------------------------------------
|
||
inline int KeyValues::GetInt( int keySymbol, int defaultValue )
|
||
{
|
||
KeyValues *dat = FindKey( keySymbol );
|
||
return dat ? dat->GetInt( (const char *)NULL, defaultValue ) : defaultValue;
|
||
}
|
||
|
||
inline uint64 KeyValues::GetUint64( int keySymbol, uint64 defaultValue )
|
||
{
|
||
KeyValues *dat = FindKey( keySymbol );
|
||
return dat ? dat->GetUint64( (const char *)NULL, defaultValue ) : defaultValue;
|
||
}
|
||
|
||
inline float KeyValues::GetFloat( int keySymbol, float defaultValue )
|
||
{
|
||
KeyValues *dat = FindKey( keySymbol );
|
||
return dat ? dat->GetFloat( (const char *)NULL, defaultValue ) : defaultValue;
|
||
}
|
||
|
||
inline const char *KeyValues::GetString( int keySymbol, const char *defaultValue )
|
||
{
|
||
KeyValues *dat = FindKey( keySymbol );
|
||
return dat ? dat->GetString( (const char *)NULL, defaultValue ) : defaultValue;
|
||
}
|
||
|
||
inline const wchar_t *KeyValues::GetWString( int keySymbol, const wchar_t *defaultValue )
|
||
{
|
||
KeyValues *dat = FindKey( keySymbol );
|
||
return dat ? dat->GetWString( (const char *)NULL, defaultValue ) : defaultValue;
|
||
}
|
||
|
||
inline void *KeyValues::GetPtr( int keySymbol, void *defaultValue )
|
||
{
|
||
KeyValues *dat = FindKey( keySymbol );
|
||
return dat ? dat->GetPtr( (const char *)NULL, defaultValue ) : defaultValue;
|
||
}
|
||
|
||
inline Color KeyValues::GetColor( int keySymbol )
|
||
{
|
||
Color defaultValue( 0, 0, 0, 0 );
|
||
KeyValues *dat = FindKey( keySymbol );
|
||
return dat ? dat->GetColor( ) : defaultValue;
|
||
}
|
||
|
||
inline bool KeyValues::IsEmpty( int keySymbol )
|
||
{
|
||
KeyValues *dat = FindKey( keySymbol );
|
||
return dat ? dat->IsEmpty( ) : true;
|
||
}
|
||
|
||
|
||
//
|
||
// KeyValuesDumpContext and generic implementations
|
||
//
|
||
|
||
class IKeyValuesDumpContext
|
||
{
|
||
public:
|
||
virtual bool KvBeginKey( KeyValues *pKey, int nIndentLevel ) = 0;
|
||
virtual bool KvWriteValue( KeyValues *pValue, int nIndentLevel ) = 0;
|
||
virtual bool KvEndKey( KeyValues *pKey, int nIndentLevel ) = 0;
|
||
};
|
||
|
||
class IKeyValuesDumpContextAsText : public IKeyValuesDumpContext
|
||
{
|
||
public:
|
||
virtual bool KvBeginKey( KeyValues *pKey, int nIndentLevel );
|
||
virtual bool KvWriteValue( KeyValues *pValue, int nIndentLevel );
|
||
virtual bool KvEndKey( KeyValues *pKey, int nIndentLevel );
|
||
|
||
public:
|
||
virtual bool KvWriteIndent( int nIndentLevel );
|
||
virtual bool KvWriteText( char const *szText ) = 0;
|
||
};
|
||
|
||
class CKeyValuesDumpContextAsDevMsg : public IKeyValuesDumpContextAsText
|
||
{
|
||
public:
|
||
// Overrides developer level to dump in DevMsg, zero to dump as Msg
|
||
CKeyValuesDumpContextAsDevMsg( int nDeveloperLevel = 1 ) : m_nDeveloperLevel( nDeveloperLevel ) {}
|
||
|
||
public:
|
||
virtual bool KvBeginKey( KeyValues *pKey, int nIndentLevel );
|
||
virtual bool KvWriteText( char const *szText );
|
||
|
||
protected:
|
||
int m_nDeveloperLevel;
|
||
};
|
||
|
||
inline bool KeyValuesDumpAsDevMsg( KeyValues *pKeyValues, int nIndentLevel = 0, int nDeveloperLevel = 1 )
|
||
{
|
||
CKeyValuesDumpContextAsDevMsg ctx( nDeveloperLevel );
|
||
return pKeyValues->Dump( &ctx, nIndentLevel );
|
||
}
|
||
|
||
|
||
#endif // KEYVALUES_H
|