78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
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/****************************************************************
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* *
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* Copyright 2001, 2011 Fidelity Information Services, 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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/*
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* SORTS_AFTER.C
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*
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* Determine the relative sorting order of two mval's.
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* Uses an alternate local collation sequence if present.
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*
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* Returns:
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* > 0 : lhs ]] rhs (lhs ]] rhs is true)
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* 0 : lhs = rhs (lhs ]] rhs is false)
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* < 0 : lha ']] rhs (lhs ]] rhs is false)
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*/
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#include "mdef.h"
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#include "gtm_string.h"
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#include "error.h"
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#include "collseq.h"
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#include "mmemory.h"
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#include "do_xform.h"
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#include "numcmp.h"
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#include "sorts_after.h"
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#include "gtm_maxstr.h"
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long sorts_after (mval *lhs, mval *rhs)
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{
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int cmp;
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int length1;
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int length2;
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mstr tmstr1;
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mstr tmstr2;
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MAXSTR_BUFF_DECL(tmp)
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DCL_THREADGBL_ACCESS;
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SETUP_THREADGBL_ACCESS;
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if (TREF(local_collseq))
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{
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MV_FORCE_STR(lhs); /* just in case lhs is not of type MV_STR, force it to be as do_xform uses the str part */
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MV_FORCE_STR(rhs); /* just in case rhs is not of type MV_STR, force it to be as do_xform uses the str part */
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ALLOC_XFORM_BUFF(lhs->str.len);
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tmstr1.len = TREF(max_lcl_coll_xform_bufsiz);
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tmstr1.addr = TREF(lcl_coll_xform_buff);
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assert(NULL != TREF(lcl_coll_xform_buff));
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do_xform(TREF(local_collseq), XFORM, &lhs->str, &tmstr1, &length1);
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MAXSTR_BUFF_INIT_RET;
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tmstr2.addr = tmp;
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tmstr2.len = MAXSTR_BUFF_ALLOC(rhs->str.len, tmstr2.addr, 0);
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do_xform(TREF(local_collseq), XFORM, &rhs->str, &tmstr2, &length2);
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MAXSTR_BUFF_FINI;
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cmp = memcmp(tmstr1.addr, tmstr2.addr, length1 <= length2 ? length1 : length2);
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return cmp != 0 ? cmp : length1 - length2;
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}
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if (MV_IS_CANONICAL(lhs))
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{ /* lhs is a number */
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if (MV_IS_CANONICAL(rhs)) /* Both lhs and rhs are numbers */
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return numcmp(lhs, rhs);
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/* lhs is a number, but rhs is a string; return false unless rhs is null */
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return (0 == rhs->str.len) ? 1 : -1;
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}
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/* lhs is a string */
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if (MV_IS_CANONICAL(rhs))
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{ /* lhs is a string, but rhs is a number; return true unless lhs is null */
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return (0 != lhs->str.len) ? 1 : -1;
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}
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/* lhs and rhs are both strings */
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return memvcmp(lhs->str.addr, lhs->str.len, rhs->str.addr, rhs->str.len);
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}
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