71 lines
1.5 KiB
C
71 lines
1.5 KiB
C
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/****************************************************************
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* *
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* Copyright 2001, 2004 Sanchez Computer Associates, Inc. *
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* *
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* This source code contains the intellectual property *
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* of its copyright holder(s), and is made available *
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* under a license. If you do not know the terms of *
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* the license, please stop and do not read further. *
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* *
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****************************************************************/
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#include "mdef.h"
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#include "gtm_string.h"
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#include "rtnhdr.h"
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#include "ident.h"
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#include "min_max.h"
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#define S_CUTOFF 7
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GBLREF rtn_tabent *rtn_names, *rtn_names_end;
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rhdtyp *find_rtn_hdr(mstr *name)
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{
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rtn_tabent *bot, *top, *mid;
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int4 comp;
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mident rtn_name;
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mident_fixed rtn_name_buff;
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assert (name->len <= MAX_MIDENT_LEN);
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rtn_name.len = name->len;
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#ifdef VMS
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rtn_name.addr = &rtn_name_buff.c[0];
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CONVERT_IDENT(rtn_name.addr, name->addr, name->len);
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#else
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rtn_name.addr = name->addr;
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#endif
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bot = rtn_names;
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top = rtn_names_end;
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for (;;)
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{
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if (top < bot)
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return 0;
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else if ((top - bot) < S_CUTOFF)
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{
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comp = -1;
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for (mid = bot; comp < 0 && mid <= top; mid++)
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{
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MIDENT_CMP(&mid->rt_name, &rtn_name, comp);
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if (0 == comp)
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return mid->rt_adr;
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}
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return 0;
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} else
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{
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mid = bot + (top - bot) / 2;
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MIDENT_CMP(&mid->rt_name, &rtn_name, comp);
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if (0 == comp)
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return mid->rt_adr;
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else if (comp < 0)
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{
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bot = mid + 1;
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continue;
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} else
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{
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top = mid - 1;
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continue;
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}
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}
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}
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}
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