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/****************************************************************
* *
* Copyright (c) 2017 Fidelity National Information *
* Services, Inc. and/or its subsidiaries. All rights reserved. *
* *
* This source code contains the intellectual property *
* of its copyright holder(s), and is made available *
* under a license. If you do not know the terms of *
* the license, please stop and do not read further. *
* *
****************************************************************/
#include "mdef.h"
#include "gdsroot.h"
#include "gtm_facility.h"
#include "fileinfo.h"
#include "gdsbt.h"
#include "gdsblk.h"
#include "gdsfhead.h"
#include "filestruct.h"
#include "jnl.h"
void jnl_write_multi_align_rec(sgmnt_addrs *csa, uint4 align_filler_len, jnl_tm_t time)
{
jnl_buffer_ptr_t jbp;
uint4 alignsize, max_filler_len, max_jrec_len, orig_align_filler_len;
uint4 filler_len1, filler_len2;
jbp = csa->jnl->jnl_buff;
alignsize = jbp->alignsize;
max_jrec_len = jbp->max_jrec_len;
assert(max_jrec_len < alignsize);
max_filler_len = max_jrec_len - MIN_ALIGN_RECLEN;
DEBUG_ONLY(orig_align_filler_len = align_filler_len);
while (align_filler_len > max_jrec_len)
{
jnl_write_align_rec(csa, max_filler_len, time); /* this will write an ALIGN record of size
* MIN_ALIGN_RECLEN + max_filler_len == max_jrec_len.
*/
align_filler_len -= max_jrec_len;
}
/* At this point, "align_filler_len <= max_jrec_len" */
if (max_filler_len >= align_filler_len)
{ /* Simple case. Write one JRT_ALIGN and return */
jnl_write_align_rec(csa, align_filler_len, time);
return;
}
/* At this point, "max_filler_len < align_filler_len <= max_jrec_len". This is an edge case.
* We need to write two ALIGN records to ensure that
* a) Record size of each of the two ALIGN records stays within "max_jrec_len" AND
* b) Total size of the two ALIGN records == align_filler_len + MIN_ALIGN_RECLEN;
*/
assert(MIN_ALIGN_RECLEN < max_filler_len);
filler_len1 = max_filler_len - MIN_ALIGN_RECLEN; /* align rec_size1 = filler_len1 + MIN_ALIGN_RECLEN == max_filler_len */
filler_len2 = align_filler_len - max_filler_len; /* align rec_size2 = filler_len2 + MIN_ALIGN_RECLEN */
/* rec_size1 + rec_size2 = max_filler_len + ((align_filler_len - max_filler_len) + MIN_ALIGN_RECLEN)
* == align_filler_len + MIN_ALIGN_RECLEN
*/
jnl_write_align_rec(csa, filler_len1, time);
jnl_write_align_rec(csa, filler_len2, time);
return;
}
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