41 lines
1.4 KiB
C
41 lines
1.4 KiB
C
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose: Shared code for parsing / searching for characters in a string
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// using lookup tables
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//
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// $Workfile: $
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// $Date: $
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// $NoKeywords: $
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//===========================================================================//
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#ifndef CHARACTERSET_H
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#define CHARACTERSET_H
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#ifdef _WIN32
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#pragma once
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#endif
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struct characterset_t {
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char set[256];
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};
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// This is essentially a strpbrk() using a precalculated lookup table
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//-----------------------------------------------------------------------------
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// Purpose: builds a simple lookup table of a group of important characters
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// Input : *pSetBuffer - pointer to the buffer for the group
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// *pSetString - list of characters to flag
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//-----------------------------------------------------------------------------
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extern void CharacterSetBuild(characterset_t *pSetBuffer,
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const char *pSetString);
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//-----------------------------------------------------------------------------
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// Purpose:
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// Input : *pSetBuffer - pre-build group buffer
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// character - character to lookup
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// Output : int - 1 if the character was in the set
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//-----------------------------------------------------------------------------
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#define IN_CHARACTERSET(SetBuffer, character) \
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((SetBuffer).set[(unsigned char)(character)])
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#endif // CHARACTERSET_H
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