characterset.h #1

//========= Copyright  1996-2005, Valve Corporation, All rights reserved. ============//
//
// Purpose: Shared code for parsing / searching for characters in a string
//			using lookup tables
//
// $Workfile:     $
// $Date:         $
//
//-----------------------------------------------------------------------------
// $Log: $
//
// $NoKeywords: $
//=============================================================================//

#ifndef CHARACTERSET_H
#define CHARACTERSET_H
#pragma once

typedef struct characterset_s
{
	char set[256];
} characterset_t;


// This is essentially a strpbrk() using a precalculated lookup table
//-----------------------------------------------------------------------------
// Purpose: builds a simple lookup table of a group of important characters
// Input  : *pSetBuffer - pointer to the buffer for the group
//			*pSetString - list of characters to flag
//-----------------------------------------------------------------------------
extern void CharacterSetBuild( characterset_t *pSetBuffer, const char *pSetString );


//-----------------------------------------------------------------------------
// Purpose: 
// Input  : *pSetBuffer - pre-build group buffer
//			character - character to lookup
// Output : int - 1 if the character was in the set
//-----------------------------------------------------------------------------
#define IN_CHARACTERSET( SetBuffer, character )		((SetBuffer).set[(character)])


#endif // CHARACTERSET_H