#include <assert.h>
#include <string.h>
#include <stdio.h>
-
-#include <log.h>
+#include <yaz/log.h>
#include "isamc-p.h"
-#include "isamh-p.h"
struct isc_merge_block {
int offset; /* offset in r_buf */
return cat + firstpos * 8;
}
-ISAMC_P isamh_append (ISAMH is, ISAMH_P ipos, ISAMH_I data)
-{
-
- char i_item[128], *i_item_ptr;
- int i_more, i_mode, i;
-
- ISAMH_PP pp;
- char f_item[128], *f_item_ptr;
- int f_more;
- int last_dirty = 0;
- int debug = is->method->debug;
-
- struct isc_merge_block mb[200];
-
- int firstpos = 0;
- int cat = 0;
- char r_item_buf[128]; /* temporary result output */
- char *r_buf; /* block with resulting data */
- int r_offset = 0; /* current offset in r_buf */
- int ptr = 0; /* pointer */
- void *r_clientData; /* encode client data */
- int border;
- int numKeys = 0;
-
- r_clientData = (*is->method->code_start)(ISAMH_ENCODE);
- r_buf = is->merge_buf + 128;
-
- pp = isamh_pp_open (is, ipos);
- /* read first item from file. make sure f_more indicates no boundary */
- f_item_ptr = f_item;
- f_more = isamh_read_item (pp, &f_item_ptr);
- if (f_more > 0)
- f_more = 1;
- cat = pp->cat;
-
- if (debug > 1)
- logf (LOG_LOG, "isc: isamh_append begin %d %d", cat, pp->pos);
-
- /* read first item from i */
- i_item_ptr = i_item;
- i_more = (*data->read_item)(data->clientData, &i_item_ptr, &i_mode);
-
- mb[ptr].block = pp->pos; /* is zero if no block on disk */
- mb[ptr].dirty = 0;
- mb[ptr].offset = 0;
-
- border = is->method->filecat[cat].bsize;
- /* border = get_border (is, mb, ptr, cat, firstpos); */
- while (i_more || f_more)
- {
- char *r_item = r_item_buf;
- int cmp;
-
- if (f_more > 1)
- {
- /* block to block boundary in the original file. */
- f_more = 1;
- if (cat == pp->cat)
- {
- /* the resulting output is of the same category as the
- the original
- */
- if (r_offset <= mb[ptr].offset +is->method->filecat[cat].mfill)
- {
- /* the resulting output block is too small/empty. Delete
- the original (if any)
- */
- if (debug > 3)
- logf (LOG_LOG, "isc: release A");
- if (mb[ptr].block)
- isamh_release_block (is, pp->cat, mb[ptr].block);
- mb[ptr].block = pp->pos;
- if (!mb[ptr].dirty)
- mb[ptr].dirty = 1;
- if (ptr > 0)
- mb[ptr-1].dirty = 1;
- }
- else
- {
- /* indicate new boundary based on the original file */
- mb[++ptr].block = pp->pos;
- mb[ptr].dirty = last_dirty;
- mb[ptr].offset = r_offset;
- if (debug > 3)
- logf (LOG_LOG, "isc: bound ptr=%d,offset=%d",
- ptr, r_offset);
- if (cat==is->max_cat && ptr >= is->method->max_blocks_mem)
- {
- /* We are dealing with block(s) of max size. Block(s)
- except 1 will be flushed.
- */
- if (debug > 2)
- logf (LOG_LOG, "isc: flush A %d sections", ptr);
- flush_blocks ((ISAMC)is, mb, ptr-1, r_buf, &firstpos, cat,
- 0, &pp->numKeys);
- mb[0].block = mb[ptr-1].block;
- mb[0].dirty = mb[ptr-1].dirty;
- memcpy (r_buf, r_buf + mb[ptr-1].offset,
- mb[ptr].offset - mb[ptr-1].offset);
- mb[0].offset = 0;
-
- mb[1].block = mb[ptr].block;
- mb[1].dirty = mb[ptr].dirty;
- mb[1].offset = mb[ptr].offset - mb[ptr-1].offset;
- ptr = 1;
- r_offset = mb[ptr].offset;
- }
- }
- }
- /*border = get_border (is, mb, ptr, cat, firstpos);*/
- border = is->method->filecat[cat].bsize;
- }
- last_dirty = 0;
- if (!f_more)
- cmp = -1;
- else if (!i_more)
- cmp = 1;
- else
- cmp = (*is->method->compare_item)(i_item, f_item);
- if (cmp == 0) /* insert i=f */
- {
- if (!i_mode) /* delete item? */
- {
- /* move i */
- i_item_ptr = i_item;
- i_more = (*data->read_item)(data->clientData, &i_item_ptr,
- &i_mode);
- /* is next input item the same as current except
- for the delete flag? */
- cmp = (*is->method->compare_item)(i_item, f_item);
- if (!cmp && i_mode) /* delete/insert nop? */
- {
- /* yes! insert as if it was an insert only */
- memcpy (r_item, i_item, i_item_ptr - i_item);
- i_item_ptr = i_item;
- i_more = (*data->read_item)(data->clientData, &i_item_ptr,
- &i_mode);
- }
- else
- {
- /* no! delete the item */
- r_item = NULL;
- last_dirty = 1;
- mb[ptr].dirty = 2;
- }
- }
- else
- {
- memcpy (r_item, f_item, f_item_ptr - f_item);
-
- /* move i */
- i_item_ptr = i_item;
- i_more = (*data->read_item)(data->clientData, &i_item_ptr,
- &i_mode);
- }
- /* move f */
- f_item_ptr = f_item;
- f_more = isamh_read_item (pp, &f_item_ptr);
- }
- else if (cmp > 0) /* insert f */
- {
- memcpy (r_item, f_item, f_item_ptr - f_item);
- /* move f */
- f_item_ptr = f_item;
- f_more = isamh_read_item (pp, &f_item_ptr);
- }
- else /* insert i */
- {
- if (!i_mode) /* delete item which isn't there? */
- {
- logf (LOG_FATAL, "Inconsistent register at offset %d",
- r_offset);
- abort ();
- }
- memcpy (r_item, i_item, i_item_ptr - i_item);
- mb[ptr].dirty = 2;
- last_dirty = 1;
- /* move i */
- i_item_ptr = i_item;
- i_more = (*data->read_item)(data->clientData, &i_item_ptr,
- &i_mode);
- }
- if (r_item) /* insert resulting item? */
- {
- char *r_out_ptr = r_buf + r_offset;
- int new_offset;
-
- (*is->method->code_item)(ISAMH_ENCODE, r_clientData,
- &r_out_ptr, &r_item);
- new_offset = r_out_ptr - r_buf;
-
- numKeys++;
-
- if (border < new_offset && border >= r_offset)
- {
- if (debug > 2)
- logf (LOG_LOG, "isc: border %d %d", ptr, border);
- /* Max size of current block category reached ...
- make new virtual block entry */
- mb[++ptr].block = 0;
- mb[ptr].dirty = 1;
- mb[ptr].offset = r_offset;
- if (cat == is->max_cat && ptr >= is->method->max_blocks_mem)
- {
- /* We are dealing with block(s) of max size. Block(s)
- except one will be flushed. Note: the block(s) are
- surely not the last one(s).
- */
- if (debug > 2)
- logf (LOG_LOG, "isc: flush B %d sections", ptr-1);
- flush_blocks ((ISAMC)is, mb, ptr-1, r_buf, &firstpos, cat,
- 0, &pp->numKeys);
- mb[0].block = mb[ptr-1].block;
- mb[0].dirty = mb[ptr-1].dirty;
- memcpy (r_buf, r_buf + mb[ptr-1].offset,
- mb[ptr].offset - mb[ptr-1].offset);
- mb[0].offset = 0;
-
- mb[1].block = mb[ptr].block;
- mb[1].dirty = mb[0].dirty;
- mb[1].offset = mb[ptr].offset - mb[ptr-1].offset;
- memcpy (r_buf + mb[1].offset, r_buf + r_offset,
- new_offset - r_offset);
- new_offset = (new_offset - r_offset) + mb[1].offset;
- ptr = 1;
- }
- border = is->method->filecat[cat].bsize;
- /* get_border (is, mb, ptr, cat, firstpos); */
- }
- r_offset = new_offset;
- }
- if (cat < is->max_cat && ptr >= is->method->filecat[cat].mblocks)
- {
- /* Max number blocks in current category reached ->
- must switch to next category (with larger block size)
- */
- int j = 0;
-
- (is->files[cat].no_remap)++;
- /* delete all original block(s) read so far */
- for (i = 0; i < ptr; i++)
- if (mb[i].block)
- isamh_release_block (is, pp->cat, mb[i].block);
- /* also delete all block to be read in the future */
- pp->deleteFlag = 1;
-
- /* remap block offsets */
- assert (mb[j].offset == 0);
- cat++;
- mb[j].dirty = 1;
- mb[j].block = 0;
- mb[ptr].offset = r_offset;
- for (i = 1; i < ptr; i++)
- {
- int border = is->method->filecat[cat].ifill -
- ISAMH_BLOCK_OFFSET_1 + mb[j].offset;
- if (debug > 3)
- logf (LOG_LOG, "isc: remap %d border=%d", i, border);
- if (mb[i+1].offset > border && mb[i].offset <= border)
- {
- if (debug > 3)
- logf (LOG_LOG, "isc: to %d %d", j, mb[i].offset);
- mb[++j].dirty = 1;
- mb[j].block = 0;
- mb[j].offset = mb[i].offset;
- }
- }
- if (debug > 2)
- logf (LOG_LOG, "isc: remap from %d to %d sections to cat %d",
- ptr, j, cat);
- ptr = j;
- border = is->method->filecat[cat].bsize;
- /*border = get_border (is, mb, ptr, cat, firstpos);*/
- if (debug > 3)
- logf (LOG_LOG, "isc: border=%d r_offset=%d", border, r_offset);
- }
- }
- if (mb[ptr].offset < r_offset)
- { /* make the final boundary offset */
- mb[++ptr].dirty = 1;
- mb[ptr].block = 0;
- mb[ptr].offset = r_offset;
- }
- else
- { /* empty output. Release last block if any */
- if (cat == pp->cat && mb[ptr].block)
- {
- if (debug > 3)
- logf (LOG_LOG, "isc: release C");
- isamh_release_block (is, pp->cat, mb[ptr].block);
- mb[ptr].block = 0;
- if (ptr > 0)
- mb[ptr-1].dirty = 1;
- }
- }
-
- if (debug > 2)
- logf (LOG_LOG, "isc: flush C, %d sections", ptr);
-
- if (firstpos)
- {
- /* we have to patch initial block with num keys if that
- has changed */
- if (numKeys != isamh_pp_num (pp))
- {
- if (debug > 2)
- logf (LOG_LOG, "isc: patch num keys firstpos=%d num=%d",
- firstpos, numKeys);
- bf_write (is->files[cat].bf, firstpos, ISAMH_BLOCK_OFFSET_N,
- sizeof(numKeys), &numKeys);
- }
- }
- else if (ptr > 0)
- { /* we haven't flushed initial block yet and there surely are some
- blocks to flush. Make first block dirty if numKeys differ */
- if (numKeys != isamh_pp_num (pp))
- mb[0].dirty = 1;
- }
- /* flush rest of block(s) in r_buf */
- flush_blocks ((ISAMC)is, mb, ptr, r_buf, &firstpos, cat, 1, &numKeys);
-
- (*is->method->code_stop)(ISAMH_ENCODE, r_clientData);
- if (!firstpos)
- cat = 0;
- if (debug > 1)
- logf (LOG_LOG, "isc: isamh_append return %d %d", cat, firstpos);
- isamh_pp_close (pp);
- return cat + firstpos * 8;
-}
-
-
/*
* $Log: merge.c,v $
- * Revision 1.12 1999-06-30 15:03:55 heikki
+ * Revision 1.20 1999-11-30 13:48:04 adam
+ * Improved installation. Updated for inclusion of YAZ header files.
+ *
+ * Revision 1.19 1999/07/14 12:12:07 heikki
+ * Large-block isam-h (may not work too well... Abandoning for isam-d)
+ *
+ * Revision 1.17 1999/07/13 14:22:17 heikki
+ * Better allocation strategy in isamh_merge
+ *
+ * Revision 1.16 1999/07/08 14:23:27 heikki
+ * Fixed a bug in isamh_pp_read and cleaned up a bit
+ *
+ * Revision 1.15 1999/07/07 09:36:04 heikki
+ * Fixed an assertion in isamh
+ *
+ * Revision 1.13 1999/07/06 09:37:05 heikki
+ * Working on isamh - not ready yet.
+ *
+ * Revision 1.12 1999/06/30 15:03:55 heikki
* first take on isamh, the append-only isam structure
*
* Revision 1.11 1999/05/26 07:49:14 adam
projects / idzebra-moved-to-github.git / blobdiff