81 lines
2.0 KiB
C
81 lines
2.0 KiB
C
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/****************************************************************
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* *
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* Copyright 2001, 2009 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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#include "mdef.h"
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#include "gdsroot.h"
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#include "gdsblk.h"
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#include "gtm_facility.h"
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#include "fileinfo.h"
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#include "gdsbt.h"
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#include "gdsfhead.h"
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#include "cdb_sc.h"
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#include "copy.h"
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#include "gvcst_expand_key.h"
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GBLREF unsigned int t_tries;
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enum cdb_sc gvcst_expand_key(blk_hdr_ptr_t bp, int4 rec_top, gv_key *key)
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{
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unsigned short temp_ushort;
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int4 r_offset;
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rec_hdr_ptr_t rp, rtop;
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sm_uc_ptr_t p;
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unsigned char *kbase, *kend, *kprv, *ktop, last, current;
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assert(SIZEOF(rec_hdr) <= SIZEOF(blk_hdr));
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kbase = kend = key->base;
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ktop = &key->base[key->top];
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rp = (rec_hdr_ptr_t)bp;
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rtop = (rec_hdr_ptr_t)((sm_uc_ptr_t)bp + rec_top);
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for (r_offset = SIZEOF(blk_hdr); ; GET_USHORT(temp_ushort, &rp->rsiz), r_offset = temp_ushort)
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{
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/* WARNING: Assumes that SIZEOF(rec_hdr) <= SIZEOF(blk_hdr) */
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if (r_offset < SIZEOF(rec_hdr))
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{
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assert(CDB_STAGNATE > t_tries);
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return cdb_sc_r2small;
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}
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rp = (rec_hdr_ptr_t)((sm_uc_ptr_t)rp + r_offset);
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if (rp > rtop)
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{
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assert(CDB_STAGNATE > t_tries);
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return cdb_sc_rmisalign;
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}
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current = 1;
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kend = kbase + rp->cmpc;
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p = (sm_uc_ptr_t)(rp + 1);
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for (;;)
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{
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if (kend >= ktop)
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{
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assert(CDB_STAGNATE > t_tries);
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return cdb_sc_keyoflow;
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}
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last = current;
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*kend++ = current = *p++;
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if (last == 0)
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{
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if (current == 0)
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break;
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else
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kprv = kend - 1; /* start of last key */
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}
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}
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if (rp == rtop)
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{
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key->end = kend - kbase - 1;
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key->prev = kprv - kbase;
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return cdb_sc_normal;
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}
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kprv = kend - 1; /* start of last key */
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}
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}
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