source-engine/public/tier1/characterset.h

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2020-04-22 16:56:21 +00:00
//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose: Shared code for parsing / searching for characters in a string
// using lookup tables
//
// $Workfile: $
// $Date: $
// $NoKeywords: $
//===========================================================================//
#ifndef CHARACTERSET_H
#define CHARACTERSET_H
#ifdef _WIN32
#pragma once
#endif
struct characterset_t
{
char set[256];
};
// 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[ (unsigned char) (character) ])
#endif // CHARACTERSET_H