csu3_am335x/EVSE/GPL/plc-utils.LNX.2.1.20/source/tools/synonym.c

/*====================================================================*
 *
 *   char const * synonym (char const * term, const struct _term_ list [], size_t size);
 *
 *   symbol.h  
 *
 *   lookup term and return corresponding text; return the original
 *   term if lookup fails; the list must be in lexographic order by 
 *   term or lookups may fail; struct _term_ is defined in types.h;
 * 
 *   Motley Tools by Charles Maier <cmaier@cmassoc.net>;
 *   Copyright (c) 2001-2006 by Charles Maier Associates;
 *   Licensed under the Internet Software Consortium License;
 *
 *--------------------------------------------------------------------*/

#ifndef SYNONYM_SOURCE
#define SYNONYM_SOURCE

#include <string.h>

#include "../tools/types.h"

char const * synonym (char const * term, const struct _term_ list [], size_t size) 

{ 
	size_t lower = 0; 
	size_t upper = size; 
	while (lower < upper) 
	{ 
		size_t index = (lower +  upper) >> 1; 
		signed order = strcmp (term, list [index].term); 
		if (order < 0) 
		{ 
			upper = index - 0; 
			continue; 
		} 
		if (order > 0) 
		{ 
			lower = index +  1; 
			continue; 
		} 
		return (list [index].text); 
	} 
	return (term); 
} 

#endif