114 lines
4.2 KiB
C
114 lines
4.2 KiB
C
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//========= Copyright <20> 1996-2005, Valve Corporation, All rights reserved. ============//
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//
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// Purpose: Defines the more complete set of operations on the string_t defined
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// These should be used instead of direct manipulation to allow more
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// flexibility in future ports or optimization.
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//
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// $NoKeywords: $
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//=============================================================================//
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#ifndef STRING_T_H
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#define STRING_T_H
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#if defined( _WIN32 )
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#pragma once
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#endif
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#ifndef NO_STRING_T
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#ifdef WEAK_STRING_T
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typedef int string_t;
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//-----------------------------------------------------------------------------
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// Purpose: The correct way to specify the NULL string as a constant.
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//-----------------------------------------------------------------------------
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#define NULL_STRING 0
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//-----------------------------------------------------------------------------
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// Purpose: Given a string_t, make a C string. By convention the result string
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// pointer should be considered transient and should not be stored.
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//-----------------------------------------------------------------------------
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#define STRING( offset ) ( ( offset ) ? reinterpret_cast<const char *>( offset ) : "" )
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//-----------------------------------------------------------------------------
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// Purpose: Given a C string, obtain a string_t
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//-----------------------------------------------------------------------------
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#define MAKE_STRING( str ) ( ( *str != 0 ) ? reinterpret_cast<int>( str ) : 0 )
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//-----------------------------------------------------------------------------
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#define IDENT_STRINGS( s1, s2 ) ( *((void **)&(s1)) == *((void **)&(s2)) )
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//-----------------------------------------------------------------------------
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#else // Strong string_t
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//-----------------------------------------------------------------------------
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struct string_t
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{
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public:
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bool operator!() const { return ( pszValue == NULL ); }
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bool operator==( const string_t &rhs ) const { return ( pszValue == rhs.pszValue ); }
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bool operator!=( const string_t &rhs ) const { return ( pszValue != rhs.pszValue ); }
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bool operator<( const string_t &rhs ) const { return ((void *)pszValue < (void *)rhs.pszValue ); }
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const char *ToCStr() const { return ( pszValue ) ? pszValue : ""; }
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protected:
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const char *pszValue;
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};
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//-----------------------------------------------------------------------------
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struct castable_string_t : public string_t // string_t is used in unions, hence, no constructor allowed
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{
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castable_string_t() { pszValue = NULL; }
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castable_string_t( const char *pszFrom ) { pszValue = (pszFrom && *pszFrom) ? pszFrom : 0; }
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};
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//-----------------------------------------------------------------------------
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// Purpose: The correct way to specify the NULL string as a constant.
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//-----------------------------------------------------------------------------
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#define NULL_STRING castable_string_t()
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//-----------------------------------------------------------------------------
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// Purpose: Given a string_t, make a C string. By convention the result string
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// pointer should be considered transient and should not be stored.
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//-----------------------------------------------------------------------------
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#define STRING( string_t_obj ) (string_t_obj).ToCStr()
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//-----------------------------------------------------------------------------
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// Purpose: Given a C string, obtain a string_t
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//-----------------------------------------------------------------------------
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#define MAKE_STRING( c_str ) castable_string_t( c_str )
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//-----------------------------------------------------------------------------
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#define IDENT_STRINGS( s1, s2 ) ( *((void **)&(s1)) == *((void **)&(s2)) )
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//-----------------------------------------------------------------------------
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#endif
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#else // NO_STRING_T
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typedef const char *string_t;
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#define NULL_STRING 0
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#define STRING( c_str ) ( c_str )
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#define MAKE_STRING( c_str ) ( c_str )
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#define IDENT_STRINGS( s1, s2 ) ( *((void **)&(s1)) == *((void **)&(s2)) )
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#endif // NO_STRING_T
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//=============================================================================
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#endif // STRING_T_H
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