* See the file LICENSE for details.
* Heikki Levanto
*
- * $Id: merge-d.c,v 1.4 1999-07-21 14:53:55 heikki Exp $
- * merge-d.c: merge routines for isamd
+ * $Id: merge-d.c,v 1.5 1999-07-23 13:58:52 heikki Exp $
*
* todo
* - merge when needed
static int separateDiffBlock(ISAMD_PP pp)
{
- return ( 0 != pp->next);
- /* Todo: This could be improved to check that there is a reasonable
- amount of space in the block, or something... */
+ if (pp->next)
+ return 1; /* multi-block chains always have a separate diff block */
+ return ( pp->size + 2*sizeof(int) > pp->is->method->filecat[pp->cat].bsize);
+ /* make sure there is at least room for the length and one diff. if not, */
+ /* it goes to a separate block */
+
+ /* todo: Make the limit adjustable in the filecat table ! */
}
/* Each diff takes at least 5 bytes. Probably more, but this is safe */
int i=1; /* [0] is used for the main data */
int diffsz= maxinfos * sizeof(struct ISAMD_DIFF_s);
+
pp->diffinfo = xmalloc( diffsz );
memset(pp->diffinfo,'\0',diffsz);
if (pp->is->method->debug > 4)
logf(LOG_LOG,"isamd_getDiffInfo: %d (%d:%d), ix=%d mx=%d",
isamd_addr(pp->pos, pp->cat), pp->cat, pp->pos, diffidx,maxinfos);
+ assert(pp->diffbuf);
while (i<maxinfos)
{
return; /* whole block done */
}
memcpy( &pp->diffinfo[i].maxidx, &pp->diffbuf[diffidx], sizeof(int) );
+
+ if (pp->is->method->debug > 4)
+ logf(LOG_LOG,"isamd_getDiffInfo: max=%d ix=%d dbuf=%p",
+ pp->diffinfo[i].maxidx, diffidx, pp->diffbuf);
+
if (0==pp->diffinfo[i].maxidx)
{
if (pp->is->method->debug > 4)
return; /* whole block done */
++i;
}
- assert ("too many diff sequences in the block");
+ assert (!"too many diff sequences in the block");
}
static void loadDiffs(ISAMD_PP pp)
if (pp->diffs & 1 )
{ /* separate diff block, load it */
pp->diffbuf= xmalloc( pp->is->method->filecat[pp->cat].bsize);
- diffaddr=pp->diffs/2;
+ diffaddr=isamd_addr(pp->diffs/2, pp->cat);
isamd_read_block (pp->is, isamd_type(diffaddr),
isamd_block(diffaddr), pp->diffbuf );
diffidx= ISAMD_BLOCK_OFFSET_N;
+ if (pp->is->method->debug > 4)
+ logf(LOG_LOG,"isamd_LoadDiffs: loaded block %d=%d:%d, d=%d ix=%d",
+ diffaddr, isamd_type(diffaddr),isamd_block(diffaddr),
+ pp->diffs,diffidx);
}
else
{ /* integrated block, just set the pointers */
pp->diffbuf = pp->buf;
diffidx = pp->size; /* size is the beginning of diffs, diffidx the end*/
+ if (pp->is->method->debug > 4)
+ logf(LOG_LOG,"isamd_LoadDiffs: within %d=%d:%d, d=%d ix=%d ",
+ isamd_addr(pp->pos,pp->cat), pp->cat, pp->pos, pp->diffs, diffidx);
}
getDiffInfo(pp,diffidx);
} /* loadDiffs */
if (pp->diffinfo[i].mode) /* insert diff, should always be */
winner = i;
else
- assert("delete diff for nonexisting item");
+ assert(!"delete diff for nonexisting item");
/* is an assert too steep here?*/
} /* earlier key */
else if (cmp==0)
} /* isamd_read_item */
-
-
-/*******************************************************************
- * Building main blocks (no diffs)
- *******************************************************************/
+/*****************************************************************
+ * Support routines
+ *****************************************************************/
static void isamd_reduceblock(ISAMD_PP pp)
/* takes a large block, and reduces its category if possible */
} /* reduceblock */
+
+
+static int save_first_pp ( ISAMD_PP firstpp)
+{
+ isamd_reduceblock(firstpp);
+ isamd_buildfirstblock(firstpp);
+ isamd_write_block(firstpp->is,firstpp->cat,firstpp->pos,firstpp->buf);
+ return isamd_addr(firstpp->pos,firstpp->cat);
+}
+
+static void save_last_pp (ISAMD_PP pp)
+{
+ pp->next = 0;/* just to be sure */
+ isamd_buildlaterblock(pp);
+ isamd_write_block(pp->is,pp->cat,pp->pos,pp->buf);
+}
+
+
+static int save_both_pps (ISAMD_PP firstpp, ISAMD_PP pp)
+{
+ /* order of things: Better to save firstpp first, if there are just two */
+ /* blocks, but last if there are blocks in between, as these have already */
+ /* been saved... optimise later (that's why this is in its own func...*/
+ int retval = save_first_pp(firstpp);
+ if (firstpp!=pp){
+ save_last_pp(pp);
+ isamd_pp_close(pp);
+ }
+ isamd_pp_close(firstpp);
+ return retval;
+} /* save_both_pps */
+
+static ISAMD_PP read_diff_block(ISAMD_PP firstpp, int* p_diffidx)
+{ /* reads the diff block (if separate) and sets diffidx right */
+ ISAMD_PP pp=firstpp;
+ int diffidx;
+ if (pp->diffs == 0)
+ { /* no diffs yet, create room for them */
+ if (separateDiffBlock(firstpp))
+ { /* create a new block */
+ pp=isamd_pp_open(pp->is,isamd_addr(0,firstpp->cat));
+ pp->pos = isamd_alloc_block(pp->is, pp->cat);
+ firstpp->diffs = pp->pos*2 +1;
+ diffidx = pp->size = pp->offset = ISAMD_BLOCK_OFFSET_N;
+ if (pp->is->method->debug >3)
+ logf(LOG_LOG,"isamd_appd: alloc diff (d=%d) %d=%d:%d ix=%d",
+ firstpp->diffs,
+ isamd_addr(pp->pos,pp->cat), pp->cat, pp->pos,
+ diffidx);
+ }
+ else
+ { /* prepare to append diffs in head */
+ diffidx = pp->size;
+ pp->diffs = diffidx *2 +0;
+ if (pp->is->method->debug >3)
+ logf(LOG_LOG,"isamd_appd: set up diffhead (d=%d) %d=%d:%d ix=%d",
+ firstpp->diffs,
+ isamd_addr(pp->pos,pp->cat), pp->cat, pp->pos,
+ diffidx);
+ }
+ } /* new */
+ else
+ { /* existing diffs */
+ if (pp->diffs & 1)
+ { /* diffs in a separate block, load it */
+ pp=isamd_pp_open(pp->is, isamd_addr(firstpp->diffs/2,pp->cat));
+ diffidx = pp->offset= pp->size;
+ if (pp->is->method->debug >3)
+ logf(LOG_LOG,"isamd_appd: loaded diff (d=%d) %d=%d:%d ix=%d",
+ firstpp->diffs,
+ isamd_addr(pp->pos,pp->cat), pp->cat, pp->pos,
+ diffidx);
+ }
+ else
+ { /* diffs within the nead */
+ diffidx= pp->diffs/2;
+ if (pp->is->method->debug >3)
+ logf(LOG_LOG,"isamd_appd: diffs in head d=%d %d=%d:%d ix=%d sz=%d",
+ pp->diffs,
+ isamd_addr(pp->pos,pp->cat), pp->cat, pp->pos,
+ diffidx, pp->size);
+ }
+ } /* diffs exist already */
+ *p_diffidx = diffidx;
+ return pp;
+} /* read_diff_block */
+
+
+
+
+/*******************************************************************
+ * Building main blocks (no diffs)
+ *******************************************************************/
+
+
+
+static ISAMD_PP get_new_main_block( ISAMD_PP firstpp, ISAMD_PP pp)
+{ /* allocates a new block for the main data, and links it in */
+ int newblock;
+ if (firstpp==pp)
+ { /* special case: it was the first block. Save much later */
+ if (0==firstpp->pos)
+ { /* firstpp not allocated yet, do so now, */
+ /* to keep blocks in order. Don't save yet, though */
+ firstpp->pos = isamd_alloc_block(pp->is, firstpp->cat);
+ }
+ newblock = isamd_alloc_block(pp->is, firstpp->cat);
+ firstpp->next = isamd_addr(newblock,firstpp->cat);
+ /* keep the largest category */
+ pp=isamd_pp_open(pp->is,isamd_addr(0,firstpp->cat));/*don't load*/
+ pp->pos=newblock;
+ pp->size = pp->offset = ISAMD_BLOCK_OFFSET_N;
+ pp->next=0;
+ if (pp->is->method->debug >3)
+ logf(LOG_LOG,"isamd_build: Alloc2 f=%d (%d:%d) n=%d(%d:%d)",
+ isamd_addr(firstpp->pos,firstpp->cat),
+ firstpp->cat, firstpp->pos,
+ isamd_addr(pp->pos,pp->cat), pp->cat, pp->pos );
+ }
+ else
+ { /* it was not the first block */
+ newblock = isamd_alloc_block(pp->is, firstpp->cat);
+ pp->next = isamd_addr(newblock,firstpp->cat);
+ isamd_buildlaterblock(pp);
+ isamd_write_block(pp->is,pp->cat,pp->pos,pp->buf);
+ pp->size = pp->offset = ISAMD_BLOCK_OFFSET_N;
+ pp->next=0;
+ pp->cat = firstpp->cat;
+ pp->pos = isamd_block(firstpp->next);
+ }
+ return pp;
+} /* get_new_main_block */
+
+
+static ISAMD_PP append_main_item(ISAMD_PP firstpp,
+ ISAMD_PP pp,
+ struct it_key *i_key,
+ void *encoder_data)
+{ /* appends one item in the main data block, allocates new if needed */
+ char *i_item= (char *) i_key; /* same as char */
+ char *i_ptr=i_item;
+ char codebuff[128];
+ char *c_ptr = codebuff;
+ int codelen;
+ char hexbuff[64];
+
+ int maxsize = pp->is->method->filecat[pp->is->max_cat].bsize;
+
+ c_ptr=codebuff;
+ i_ptr=i_item;
+ (*pp->is->method->code_item)(ISAMD_ENCODE, encoder_data, &c_ptr, &i_ptr);
+ codelen = c_ptr - codebuff;
+ assert ( (codelen<128) && (codelen>0));
+ if (pp->is->method->debug >3)
+ logf(LOG_LOG,"isamd:build: coded into %s (nk=%d)",
+ hexdump(codebuff, c_ptr-codebuff,hexbuff), firstpp->numKeys+1);
+
+ if (pp->offset + codelen > maxsize )
+ { /* oops, block full - get a new one */
+ pp = get_new_main_block( firstpp, pp );
+ /* reset encoging and code again */
+ (*pp->is->method->code_reset)(encoder_data);
+ c_ptr=codebuff;
+ i_ptr=i_item;
+ (*pp->is->method->code_item)(ISAMD_ENCODE, encoder_data, &c_ptr, &i_ptr);
+ codelen = c_ptr - codebuff;
+ assert ( (codelen<128) && (codelen>0));
+ if (pp->is->method->debug >3)
+ logf(LOG_LOG,"isamd:build: recoded into %s (nk=%d)",
+ hexdump(codebuff, c_ptr-codebuff,hexbuff), firstpp->numKeys+1);
+ } /* block full */
+
+ /* write the data into pp, now we must have room */
+ memcpy(&(pp->buf[pp->offset]),codebuff,codelen);
+ pp->offset += codelen;
+ pp->size += codelen;
+ firstpp->numKeys++;
+ return pp;
+} /* append_main_item */
+
+
static int isamd_build_first_block(ISAMD is, ISAMD_I data)
{
struct it_key i_key; /* input key */
ISAMD_PP firstpp;
ISAMD_PP pp;
void *encoder_data;
- int maxsize;
-
- char codebuff[128];
- char *c_ptr = codebuff;
- int codelen;
char hexbuff[64];
- int newblock;
- int retval=0;
firstpp=pp=isamd_pp_open(is, isamd_addr(0,is->max_cat));
firstpp->size = firstpp->offset = ISAMD_BLOCK_OFFSET_1;
encoder_data=(*is->method->code_start)(ISAMD_ENCODE);
- maxsize = is->method->filecat[is->max_cat].bsize;
if (is->method->debug >3)
logf(LOG_LOG,"isamd_bld start: p=%d c=%d sz=%d maxsz=%d ",
- pp->pos, pp->cat, pp->size, maxsize);
+ pp->pos, pp->cat, pp->size,
+ pp->is->method->filecat[pp->is->max_cat].bsize);
/* read first input */
i_ptr = i_item;
if (i_more)
assert( i_ptr-i_item == sizeof(i_key) );
- if (is->method->debug >3)
+ if (pp->is->method->debug >3)
logf(LOG_LOG,"isamd: build_fi start: m=%d %s",
i_mode, hexdump(i_item,i_ptr-i_item,hexbuff) );
{
if (i_mode!=0)
{ /* ignore deletes here, should not happen */
-
- c_ptr=codebuff;
- i_ptr=i_item;
- (*is->method->code_item)(ISAMD_ENCODE, encoder_data, &c_ptr, &i_ptr);
- codelen = c_ptr - codebuff;
- assert ( (codelen<128) && (codelen>0));
- if (is->method->debug >3)
- logf(LOG_LOG,"isamd:build: coded into %s (nk=%d)",
- hexdump(codebuff, c_ptr-codebuff,hexbuff), firstpp->numKeys+1);
-
- if (pp->offset + codelen > maxsize )
- { /* oops, block full - get a new one */
- if (firstpp==pp)
- { /* special case: it was the first block. Save much later */
- if (0==firstpp->pos)
- { /* firstpp not allocated yet, do so now, */
- /* to keep blocks in order. Don't save yet, though */
- firstpp->pos = isamd_alloc_block(is, firstpp->cat);
- }
- newblock = isamd_alloc_block(is, firstpp->cat);
- firstpp->next = isamd_addr(newblock,firstpp->cat);
- /* keep the largest category */
- pp=isamd_pp_open(is,isamd_addr(0,firstpp->cat));/*don't load*/
- pp->pos=newblock;
- pp->size = pp->offset = ISAMD_BLOCK_OFFSET_N;
- pp->next=0;
- if (is->method->debug >3)
- logf(LOG_LOG,"isamd_build: Alloc2 f=%d (%d:%d) n=%d(%d:%d)",
- isamd_addr(firstpp->pos,firstpp->cat),
- firstpp->cat, firstpp->pos,
- isamd_addr(pp->pos,pp->cat), pp->cat, pp->pos );
- }
- else
- { /* it was not the first block */
- newblock = isamd_alloc_block(is, firstpp->cat);
- pp->next = isamd_addr(newblock,firstpp->cat);
- isamd_buildlaterblock(pp);
- isamd_write_block(is,pp->cat,pp->pos,pp->buf);
- pp->size = pp->offset = ISAMD_BLOCK_OFFSET_N;
- pp->next=0;
- pp->cat = firstpp->cat;
- pp->pos = isamd_block(firstpp->next);
- }
- /* reset encoging and code again */
- (*is->method->code_reset)(encoder_data);
- c_ptr=codebuff;
- i_ptr=i_item;
- (*is->method->code_item)(ISAMD_ENCODE, encoder_data, &c_ptr, &i_ptr);
- codelen = c_ptr - codebuff;
- assert ( (codelen<128) && (codelen>0));
- if (is->method->debug >3)
- logf(LOG_LOG,"isamd:build: recoded into %s (nk=%d)",
- hexdump(codebuff, c_ptr-codebuff,hexbuff), firstpp->numKeys+1);
- } /* block full */
-
- /* write the data into pp, now we have room */
- memcpy(&(pp->buf[pp->offset]),codebuff,codelen);
- pp->offset += codelen;
- pp->size += codelen;
- firstpp->numKeys++;
+ pp= append_main_item(firstpp, pp, &i_key, encoder_data);
} /* not delete */
/* (try to) read the next item */
i_ptr = i_item;
i_more = (*data->read_item)(data->clientData, &i_ptr, &i_mode);
- if ( (i_more) && (is->method->debug >3) )
+ if ( (i_more) && (pp->is->method->debug >3) )
logf(LOG_LOG,"isamd: build_fi start: m=%d %s",
i_mode, hexdump(i_item,i_ptr-i_item,hexbuff) );
-
} /* i_more */
- /* order of things: Better to save firstpp first, if there are just two */
- /* blocks, but last if there are blocks in between, as these have already */
- /* been saved... optimise later */
+ return save_both_pps( firstpp, pp );
- /* save the first block */
- isamd_reduceblock(firstpp);
- isamd_buildfirstblock(firstpp);
- isamd_write_block(is,firstpp->cat,firstpp->pos,firstpp->buf);
- retval = isamd_addr(firstpp->pos,firstpp->cat);
+} /* build_first_block */
- if (firstpp!=pp){ /* and the last one */
- pp->next = 0;/* just to be sure */
- isamd_buildlaterblock(pp);
- isamd_write_block(is,pp->cat,pp->pos,pp->buf);
- isamd_pp_close(pp);
- }
- isamd_pp_close(firstpp);
+/***************************************************************
+ * Merging diffs
+ ***************************************************************/
+
+
+static int merge ( ISAMD_PP *p_firstpp, /* first pp of the chain */
+ ISAMD_PP *p_pp, /* diff block */
+ struct it_key *p_key )
+{
+ ISAMD_PP readpp = *p_firstpp;
+ int diffidx;
+ int killblk=0;
+ struct it_key r_key;
+ char * r_ptr;
+ int r_more = 1;
+ ISAMD_PP firstpp; /* the new first, the one we write into */
+ ISAMD_PP pp;
+ void *encoder_data;
+
+ /* set up diffs as they should be for reading */
+ readpp->offset= ISAMD_BLOCK_OFFSET_1;
+
+ if (*p_pp == *p_firstpp)
+ { /* integrated diffs */
+ diffidx=readpp->size;
+ readpp->diffs = diffidx*2+0;
+ readpp->diffbuf=readpp->buf; /*? does this get freed right ??? */
+ if (readpp->is->method->debug >3)
+ logf(LOG_LOG,"isamd_merge:local diffs at %d", diffidx);
+ }
+ else
+ { /* separate diff block in *p_pp */
+ killblk = readpp->diffs/2;
+ diffidx = readpp->is->method->filecat[readpp->cat].bsize;
+ readpp->diffbuf= xmalloc( diffidx); /* copy diffs to where read wants*/
+ memcpy( &readpp->diffbuf, &((*p_pp)->buf[0]), diffidx);
+ diffidx = ISAMD_BLOCK_OFFSET_N;
+ if (readpp->is->method->debug >3)
+ logf(LOG_LOG,"isamd_merge:separate diffs at ix=%d",
+ diffidx);
+ if (readpp->is->method->debug >3)
+ logf(LOG_LOG,"isamd_merge: dbuf=%p (from %p) pp=%p",
+ readpp->diffbuf, &((*p_pp)->buf[0]), (*p_pp) );
+ }
+ getDiffInfo(readpp,diffidx);
+
+ r_ptr= (char *) &r_key;
+ r_more = isamd_read_item( readpp, &r_ptr);
+ if (!r_more)
+ { /* oops, all data has been deleted! what to do??? */
+ /* never mind, we have at least one more delta to add to the block */
+ /* pray that is not a delete as well... */
+ r_key.sysno = 0;
+ r_key.seqno = 0;
+ if (readpp->is->method->debug >3)
+ logf(LOG_LOG,"isamd_merge:all data has been deleted (nk=%d) ",
+ readpp->numKeys);
+ assert (readpp->numKeys == 0);
+ }
+
+ if (killblk)
+ {
+ isamd_release_block(readpp->is, isamd_type(killblk), isamd_block(killblk));
+ /* we have the data, let the block go */
+ if (readpp->is->method->debug >3)
+ logf(LOG_LOG,"isamd_merge: released diff block %d (%d:%d)",
+ killblk, isamd_type(killblk), isamd_block(killblk) );
+ }
+ killblk=isamd_addr(readpp->pos, readpp->cat);
+ isamd_release_block(readpp->is, isamd_type(killblk), isamd_block(killblk));
+ if (readpp->is->method->debug >3)
+ logf(LOG_LOG,"isamd_merge: released old firstblock %d (%d:%d)",
+ killblk, isamd_type(killblk), isamd_block(killblk) );
- return retval;
-} /* build_first_block */
+ /* set up the new blocks for simple writing */
+ firstpp=pp=isamd_pp_open(readpp->is,isamd_addr(0, readpp->is->max_cat));
+ firstpp->size = firstpp->offset = ISAMD_BLOCK_OFFSET_1;
+ encoder_data = (*pp->is->method->code_start)(ISAMD_ENCODE);
+
+ while (r_more)
+ {
+ if (readpp->is->method->debug >4)
+ logf(LOG_LOG,"isamd_merge: got key %d.%d",
+ r_key.sysno, r_key.seqno );
+ pp= append_main_item(firstpp, pp, &r_key, encoder_data);
+
+ if ( isamd_addr(readpp->pos, readpp->cat) != killblk )
+ {
+ isamd_release_block(readpp->is, readpp->cat, readpp->pos);
+ if (readpp->is->method->debug >3)
+ logf(LOG_LOG,"isamd_merge: released data block %d (%d:%d)",
+ killblk, isamd_type(killblk), isamd_block(killblk) );
+ killblk=isamd_addr(readpp->pos, readpp->cat);
+ }
+
+ /* (try to) read next item */
+ r_ptr= (char *) &r_key;
+ r_more = isamd_read_item( readpp, &r_ptr);
+
+ } /* while read */
+
+ /* TODO: while pkey is an insert, and after last key inserted, append it */
+ /* will prevent multiple merges on large insert runs */
+
+ /* set things up so that merge can continue */
+ isamd_reduceblock(firstpp);
+
+ if (firstpp!=pp)
+ { /* the last data block is of no interest any more */
+ save_last_pp(pp);
+ isamd_pp_close(pp);
+ }
+
+ *p_firstpp = firstpp;
+
+ return 0;
+
+} /* merge */
+
/***************************************************************
***************************************************************/
+
static int append_diffs(ISAMD is, ISAMD_P ipos, ISAMD_I data)
{
struct it_key i_key; /* one input item */
ISAMD_PP pp;
void *encoder_data;
char hexbuff[64];
- int retval=ipos; /* by default we do not change the firstblock addr */
int diffidx=0;
int maxsize=0;
int difflenidx;
char codebuff[128];
char *c_ptr = codebuff;
int codelen;
-
- pp=firstpp=isamd_pp_open(is, ipos);
-
- /* TODO: Turn these ifs around! Check first diffs==0, and create new */
- /* according to separateDiffBlock. if !=0, read according to its type */
- /* bit. Much more robust this way around! */
-
- if (separateDiffBlock(firstpp))
- { /* multi-block item, get the diff block */
- if (firstpp->diffs==0)
- { /* allocate first diff block */
- pp=isamd_pp_open(is,isamd_addr(0,firstpp->cat));
- pp->pos = isamd_alloc_block(pp->is, pp->cat);
- firstpp->diffs = pp->pos*2 +1;
- diffidx = pp->size = pp->offset = ISAMD_BLOCK_OFFSET_N;
- if (is->method->debug >3)
- logf(LOG_LOG,"isamd_appd: alloc diff (%d) %d %d:%d ix=%d",
- firstpp->diffs,
- isamd_addr(pp->pos,pp->cat), pp->cat, pp->pos,
- diffidx);
- }
- else
- { /* find pointers within the existing block */
- pp=isamd_pp_open(is, firstpp->diffs/2);
- diffidx = pp->offset= pp->size;
- if (is->method->debug >3)
- logf(LOG_LOG,"isamd_appd: load diff (%d) %d (%d:%d) ix=%d",
- firstpp->diffs,
- isamd_addr(pp->pos,pp->cat), pp->cat, pp->pos,
- diffidx);
- }
- }
- else
- { /* single-block item, get idx right */
- diffidx= pp->diffs/2;
- if (is->method->debug >3)
- logf(LOG_LOG,"isamd_appd: diffs in head %d (%d:%d) ix=%d sz=%d",
- isamd_addr(pp->pos,pp->cat), pp->cat, pp->pos,
- diffidx, pp->size);
- if (0==diffidx)
- { /* no diffs yet, make them */
- diffidx = pp->size;
- pp->diffs = diffidx *2 +0;
- }
- }
-
+ int merge_rc;
+
+ firstpp=isamd_pp_open(is, ipos);
+ if (is->method->debug >4)
+ logf(LOG_LOG,"isamd_appd: Start ipos=%d=%d:%d d=%d=%d*2+%d",
+ ipos, isamd_type(ipos), isamd_block(ipos),
+ firstpp->diffs, firstpp->diffs/2, firstpp->diffs & 1);
+ pp=read_diff_block(firstpp, &diffidx);
encoder_data=(*is->method->code_start)(ISAMD_ENCODE);
maxsize = is->method->filecat[pp->cat].bsize;
while (i_more)
{
+ /* store the mode bit inside key */
assert( ((i_key.seqno<<1)>>1) == i_key.seqno); /* can spare the bit */
- i_key.seqno = i_key.seqno * 2 + i_mode;
+ i_key.seqno = i_key.seqno * 2 + i_mode;
+
c_ptr=codebuff;
i_ptr=i_item;
(*is->method->code_item)(ISAMD_ENCODE, encoder_data, &c_ptr, &i_ptr);
if (diffidx + codelen > maxsize )
{ /* block full */
- logf(LOG_LOG,"isamd_appd: block full (ix=%d mx=%d)",
- diffidx, maxsize);
- return 0; /*!*/ /* do something about it!!! */
+ if (is->method->debug >3)
+ logf(LOG_LOG,"isamd_appd: block full (ix=%d mx=%d lix=%d)",
+ diffidx, maxsize, difflenidx);
+ if (is->method->debug >3)
+ logf(LOG_LOG,"isamd_appd: block pp=%p buf=%p [%d]:%s",
+ pp, pp->buf, difflenidx, hexdump(&pp->buf[difflenidx],8,0));
+ merge_rc = merge (&firstpp, &pp, &i_key);
+ if (merge_rc)
+ return merge_rc; /* merge handled them all ! */
+
+ /* set things up so we can continue */
+ pp = read_diff_block(firstpp, &diffidx);
+
} /* block full */
/* save the diff */
firstpp->numKeys++; /* insert diff */
else
firstpp->numKeys--; /* delete diff */
+
+ /* update length of this diff run */
memcpy(&(pp->buf[difflenidx]),&diffidx,sizeof(diffidx));
if (firstpp==pp)
firstpp->diffs =diffidx*2+0;
else
pp->size =diffidx;
- /* try to read the next input */
+ /* (try to) read the next input */
i_ptr = i_item;
i_more = (*data->read_item)(data->clientData, &i_ptr, &i_mode);
if ( (i_more) && (is->method->debug >3) )
difflenidx = diffidx;
while ( (difflenidx-diffidx<=sizeof(int)) && (difflenidx<maxsize))
pp->buf[difflenidx++]='\0';
-
- /* ok, save the block(s) */
- if (firstpp != pp)
- { /* save the diff block */
- pp->next = 0; /* just to be sure */
- isamd_buildlaterblock(pp);
- isamd_write_block(is,pp->cat,pp->pos,pp->buf);
- isamd_pp_close(pp);
- }
- isamd_buildfirstblock(firstpp);
- isamd_write_block(is,firstpp->cat,firstpp->pos,firstpp->buf);
- retval = isamd_addr(firstpp->pos,firstpp->cat);
- isamd_pp_close(firstpp);
+ return save_both_pps( firstpp, pp );
- return retval;
} /* append_diffs */
/*
* $Log: merge-d.c,v $
- * Revision 1.4 1999-07-21 14:53:55 heikki
+ * Revision 1.5 1999-07-23 13:58:52 heikki
+ * merged closer to working, still fails on filling a separate, large block
+ *
+ * Revision 1.4 1999/07/21 14:53:55 heikki
* isamd read and write functions work, except when block full
* Merge missing still. Need to split some functions
*
projects / idzebra-moved-to-github.git / commitdiff