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synonym.c
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/*====================================================================*
*
* 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
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