-/* $Id: isamb.c,v 1.95 2007-11-28 10:38:10 adam Exp $
- Copyright (C) 1995-2007
- Index Data ApS
-
-This file is part of the Zebra server.
+/* This file is part of the Zebra server.
+ Copyright (C) 2004-2013 Index Data
Zebra is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
*/
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
#include <stdlib.h>
#include <string.h>
#include <yaz/log.h>
#define INT_ENCODE 1
/* maximum size of encoded buffer */
-#define DST_ITEM_MAX 256
+#define DST_ITEM_MAX 5000
+
+/* max page size for _any_ isamb use */
+#define ISAMB_MAX_PAGE 32768
#define ISAMB_MAX_LEVEL 10
/* approx 2*max page + max size of item */
-#define DST_BUF_SIZE (2*4096+300)
+#define DST_BUF_SIZE (2*ISAMB_MAX_PAGE+DST_ITEM_MAX+100)
/* should be maximum block size of multiple thereof */
-#define ISAMB_CACHE_ENTRY_SIZE 4096
+#define ISAMB_CACHE_ENTRY_SIZE ISAMB_MAX_PAGE
/* CAT_MAX: _must_ be power of 2 */
#define CAT_MAX 4
int log_io; /* log level for bf_read/bf_write calls */
int log_freelist; /* log level for freelist handling */
zint skipped_numbers; /* on a leaf node */
- zint returned_numbers;
+ zint returned_numbers;
zint skipped_nodes[ISAMB_MAX_LEVEL]; /* [0]=skipped leaves, 1 = higher etc */
zint accessed_nodes[ISAMB_MAX_LEVEL]; /* nodes we did not skip */
zint number_of_int_splits;
zint total_size;
zint no_blocks;
zint skipped_numbers; /* on a leaf node */
- zint returned_numbers;
+ zint returned_numbers;
zint skipped_nodes[ISAMB_MAX_LEVEL]; /* [0]=skipped leaves, 1 = higher etc */
zint accessed_nodes[ISAMB_MAX_LEVEL]; /* nodes we did not skip */
struct ISAMB_block **block;
pos++;
if (!bf_read(isamb->file[i].bf, pos, 0, 0, hbuf + pos*sizes[i]))
{
- yaz_log(YLOG_WARN, "truncated isamb header for "
+ yaz_log(YLOG_WARN, "truncated isamb header for "
"file=%s len=%d pos=%d",
fname, len, pos);
isamb_close(isamb);
{
int sizes[CAT_NO];
int i, b_size = ISAMB_MIN_SIZE;
-
+
for (i = 0; i<CAT_NO; i++)
{
sizes[i] = b_size;
static int cache_block(ISAMB b, ISAM_P pos, unsigned char *userbuf, int wr)
{
int cat = (int) (pos&CAT_MASK);
- int off = (int) (((pos/CAT_MAX) &
+ int off = (int) (((pos/CAT_MAX) &
(ISAMB_CACHE_ENTRY_SIZE / b->file[cat].head.block_size - 1))
* b->file[cat].head.block_size);
zint norm = pos / (CAT_MASK*ISAMB_CACHE_ENTRY_SIZE / b->file[cat].head.block_size);
{
ce_this = *ce;
*ce = (*ce)->next; /* remove from list */
-
+
ce_this->next = b->file[cat].cache_entries; /* move to front */
b->file[cat].cache_entries = ce_this;
-
+
if (wr)
{
- memcpy(ce_this->buf + off, userbuf,
+ memcpy(ce_this->buf + off, userbuf,
b->file[cat].head.block_size);
ce_this->dirty = 1;
}
0: leader byte, != 0 leaf, == 0, non-leaf
1-2: used size of block
3-7*: number of items and all children
-
+
* Reserve 5 bytes for large block sizes. 1 for small ones .. Number
- of items. We can thus have at most 2^40 nodes.
+ of items. We can thus have at most 2^40 nodes.
*/
static struct ISAMB_block *open_block(ISAMB b, ISAM_P pos)
{
zint block_no;
block_no = b->file[cat].head.last_block++;
p->pos = block_no * CAT_MAX + cat;
+ if (b->log_freelist)
+ yaz_log(b->log_freelist, "got block "
+ ZINT_FORMAT " from last %d:" ZINT_FORMAT, p->pos,
+ cat, p->pos/CAT_MAX);
}
else
{
zebra_exit("isamb:new_block");
}
}
- yaz_log(b->log_freelist, "got block " ZINT_FORMAT " from freelist %d:" ZINT_FORMAT, p->pos,
- cat, p->pos/CAT_MAX);
+ if (b->log_freelist)
+ yaz_log(b->log_freelist, "got block "
+ ZINT_FORMAT " from freelist %d:" ZINT_FORMAT, p->pos,
+ cat, p->pos/CAT_MAX);
memcpy(&b->file[cat].head.free_list, p->buf, sizeof(zint));
}
p->cat = cat;
char *endp = p->bytes + p->size;
ISAM_P pos;
void *c1 = (*b->method->codec.start)();
-
+
decode_ptr(&src, &pos);
assert((pos&CAT_MASK) == p->cat);
while (src != endp)
p->pos, p->cat, p->pos/CAT_MAX);
memcpy(p->buf, &b->file[p->cat].head.free_list, sizeof(zint));
b->file[p->cat].head.free_list = p->pos;
+ b->file[p->cat].head_dirty = 1;
if (!cache_block(b, p->pos, p->buf, 1))
{
yaz_log(b->log_io, "bf_write: close_block (deleted)");
int size = p->size + offset;
char *dst = (char*)p->buf + 3;
assert(p->size >= 0);
-
+
/* memset becuase encode_ptr usually does not write all bytes */
memset(p->buf, 0, b->file[p->cat].head.block_offset);
p->buf[0] = p->leaf;
assert(sub_p1);
diff_terms -= sub_p1->no_items;
more = insert_sub(b, &sub_p1, lookahead_item, mode,
- stream, &sub_p2,
+ stream, &sub_p2,
sub_item, &sub_size, file_item_buf);
diff_terms += sub_p1->no_items;
src = src0;
assert(sub_p1);
diff_terms -= sub_p1->no_items;
more = insert_sub(b, &sub_p1, lookahead_item, mode,
- stream, &sub_p2,
+ stream, &sub_p2,
sub_item, &sub_size, src);
diff_terms += sub_p1->no_items;
src = src0;
sub_p1 = open_block(b, pos);
assert(sub_p1);
diff_terms -= sub_p1->no_items;
- more = insert_sub(b, &sub_p1, lookahead_item, mode, stream, &sub_p2,
+ more = insert_sub(b, &sub_p1, lookahead_item, mode, stream, &sub_p2,
sub_item, &sub_size, last_max_item);
diff_terms += sub_p1->no_items;
}
#if INT_ENCODE
const char *sub_item_ptr = sub_item;
#endif
- assert(sub_size < 128 && sub_size > 1);
+ assert(sub_size < DST_ITEM_MAX && sub_size > 1);
memcpy(dst, startp, src - startp);
-
+
dst += src - startp;
#if INT_ENCODE
const char *half;
src = dst_buf;
endp = dst;
-
+
b->number_of_int_splits++;
p->dirty = 1;
{
char file_item_buf[DST_ITEM_MAX];
char *file_item = file_item_buf;
-
+
src = p->bytes;
endp = p->bytes + p->size;
(*b->method->codec.decode)(c1, &file_item, &src);
char *lookahead_next;
char *dst_0 = dst;
int d = -1;
-
+
if (lookahead_item)
d = (*b->method->compare_item)(file_item_buf, lookahead_item);
-
+
/* d now holds comparison between existing file item and
- lookahead item
+ lookahead item
d = 0: equal
d > 0: lookahead before file
d < 0: lookahead after file
}
else if (d == 0 && *lookahead_mode == 2)
{
- /* For mode == 2, we insert the new key anyway - even
+ /* For mode == 2, we insert the new key anyway - even
though the comparison is 0. */
dst_item = lookahead_item;
p->dirty = 1;
/* encode the resulting item */
(*b->method->codec.encode)(c2, &dst, &dst_item);
-
+
cut_item_size = dst_item - dst_item_0;
assert(cut_item_size > 0);
memcpy(cut_item_buf, dst_item_0, cut_item_size);
-
+
half2 = dst;
no_items_1 = no_items;
no_items++;
}
/* now move "pointers" .. result has been encoded .. */
- if (d > 0)
+ if (d > 0)
{
/* we must move the lookahead pointer */
leaf. Mark it as "gone" */
lookahead_item = 0;
}
-
+
p->dirty = 1;
}
}
char *dst_item;
const char *src = lookahead_item;
char *dst_0 = dst;
-
+
/* if we have a lookahead item, we stop if we exceed the value of it */
if (max_item &&
(*b->method->compare_item)(max_item, lookahead_item) <= 0)
{
const char *src_0 = src;
half1 = dst; /* candidate for splitting */
-
+
(*b->method->codec.encode)(c2, &dst, &src);
-
+
cut_item_size = src - src_0;
assert(cut_item_size > 0);
memcpy(cut_item_buf, src_0, cut_item_size);
-
+
no_items_1 = no_items;
half2 = dst;
}
}
}
new_size = dst - dst_buf;
- if (p && p->cat != b->no_cat-1 &&
+ if (p && p->cat != b->no_cat-1 &&
new_size > b->file[p->cat].head.block_max)
{
/* non-btree block will be removed */
assert(half2);
assert(cut_item_size > 0);
-
+
/* first half */
p->size = half1 - dst_buf;
assert(p->size <= b->file[p->cat].head.block_max);
const void *max_item)
{
if (!*p || (*p)->leaf)
- return insert_leaf(b, p, new_item, mode, stream, sp, sub_item,
+ return insert_leaf(b, p, new_item, mode, stream, sp, sub_item,
sub_size, max_item);
else
return insert_int(b, *p, new_item, mode, stream, sp, sub_item,
#endif
decode_ptr(&src, &sub_p);
isamb_unlink(b, sub_p);
-
+
while (src != p1->bytes + p1->size)
{
#if INT_ENCODE
struct ISAMB_block *p = 0, *sp = 0;
char sub_item[DST_ITEM_MAX];
int sub_size;
-
+
if (*pos)
p = open_block(b, *pos);
more = insert_sub(b, &p, item_buf, &i_mode, stream, &sp,
#endif
encode_ptr(&dst, p->pos);
- assert(sub_size < 128 && sub_size > 1);
+ assert(sub_size < DST_ITEM_MAX && sub_size > 1);
#if INT_ENCODE
(*b->method->codec.reset)(c1);
(*b->method->codec.encode)(c1, &dst, &sub_item_ptr);
dst += sub_size;
#endif
encode_ptr(&dst, sp->pos);
-
+
p2->size = dst - p2->bytes;
p2->no_items = p->no_items + sp->no_items;
*pos = p2->pos; /* return new super page */
decode_ptr(&src, &pos);
p->offset = src - p->bytes;
pp->level++;
- pp->accessed_nodes[pp->level]++;
+ pp->accessed_nodes[pp->level]++;
}
pp->block[pp->level+1] = 0;
pp->maxlevel = pp->level;
int i;
if (!pp)
return;
- yaz_log(YLOG_DEBUG, "isamb_pp_close lev=%d returned "ZINT_FORMAT" values, "
+ yaz_log(YLOG_DEBUG, "isamb_pp_close lev=%d returned "ZINT_FORMAT" values, "
"skipped "ZINT_FORMAT,
pp->maxlevel, pp->skipped_numbers, pp->returned_numbers);
for (i = pp->maxlevel; i>=0; i--)
p->offset = src - (char*) p->bytes;
isamb_dump_r(b, sub, pr, level+1);
-
+
while (p->offset < p->size)
{
#if INT_ENCODE
src += item_len;
#endif
decode_ptr(&src, &sub);
-
+
p->offset = src - (char*) p->bytes;
-
+
isamb_dump_r(b, sub, pr, level+1);
- }
+ }
}
close_block(b, p);
}
}
-static int isamb_pp_on_right_node(ISAMB_PP pp, int level, const void *untilbuf)
-{ /* looks one node higher to see if we should be on this node at all */
- /* useful in backing off quickly, and in avoiding tail descends */
- /* call with pp->level to begin with */
- struct ISAMB_block *p;
- int cmp;
- const char *src;
- ISAMB b = pp->isamb;
-
- assert(level >= 0);
- if (level == 0)
- {
-#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG, "isamb_pp_on_right returning true for root");
-#endif
- return 1; /* we can never skip the root node */
- }
- level--;
- p = pp->block[level];
- assert(p->offset <= p->size);
- if (p->offset < p->size)
- {
-#if INT_ENCODE
- char file_item_buf[DST_ITEM_MAX];
- char *file_item = file_item_buf;
- void *c1 = (*b->method->codec.start)();
- assert(p->offset > 0);
- src = p->bytes + p->offset;
- (*b->method->codec.decode)(c1, &file_item, &src);
- (*b->method->codec.stop)(c1);
- cmp = (*b->method->compare_item)(untilbuf, file_item_buf);
-#else
- zint item_len;
- assert(p->offset > 0);
- src = p->bytes + p->offset;
- decode_item_len(&src, &item_len);
-#if ISAMB_DEBUG
- (*b->method->codec.log_item)(YLOG_DEBUG, untilbuf, "on_leaf: until");
- (*b->method->codec.log_item)(YLOG_DEBUG, src, "on_leaf: value");
-#endif
- cmp = (*b->method->compare_item)(untilbuf, src);
-#endif
- if (cmp < pp->scope)
- { /* cmp<2 */
-#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG, "isamb_pp_on_right returning true "
- "cmp=%d lev=%d ofs=%d", cmp, level, p->offset);
-#endif
- return 1;
- }
- else
- {
-#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG, "isamb_pp_on_right returning false "
- "cmp=%d lev=%d ofs=%d", cmp, level, p->offset);
-#endif
- return 0;
- }
- }
- else {
-#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG, "isamb_pp_on_right at tail, looking higher "
- "lev=%d", level);
-#endif
- return isamb_pp_on_right_node(pp, level, untilbuf);
- }
-} /* isamb_pp_on_right_node */
-
-static int isamb_pp_read_on_leaf(ISAMB_PP pp, void *buf)
-{
- /* reads the next item on the current leaf, returns 0 if end of leaf*/
- struct ISAMB_block *p = pp->block[pp->level];
- char *dst;
- const char *src;
- assert(pp);
- assert(buf);
- if (p->offset == p->size)
- {
-#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG, "isamb_pp_read_on_leaf returning 0 on "
- "node %d", p->pos);
-#endif
- return 0; /* at end of leaf */
- }
- src = p->bytes + p->offset;
- dst = buf;
- (*pp->isamb->method->codec.decode)(p->decodeClientData, &dst, &src);
- p->offset = src - (char*) p->bytes;
-#if ISAMB_DEBUG
- (*pp->isamb->method->codec.log_item)(YLOG_DEBUG, buf,
- "read_on_leaf returning 1");
-#endif
- pp->returned_numbers++;
- return 1;
-} /* read_on_leaf */
-
-static int isamb_pp_forward_on_leaf(ISAMB_PP pp, void *buf, const void *untilbuf)
-{ /* forwards on the current leaf, returns 0 if not found */
- int cmp;
- int skips = 0;
- while (1)
- {
- if (!isamb_pp_read_on_leaf(pp, buf))
- return 0;
- /* FIXME - this is an extra function call, inline the read? */
- cmp=(*pp->isamb->method->compare_item)(untilbuf, buf);
- if (cmp <pp->scope)
- { /* cmp<2 found a good one */
-#if ISAMB_DEBUG
- if (skips)
- yaz_log(YLOG_DEBUG, "isam_pp_fwd_on_leaf skipped %d items", skips);
-#endif
- pp->returned_numbers++;
- return 1;
- }
- if (!skips)
- if (!isamb_pp_on_right_node(pp, pp->level, untilbuf))
- return 0; /* never mind the rest of this leaf */
- pp->skipped_numbers++;
- skips++;
- }
-} /* forward_on_leaf */
-
-static int isamb_pp_climb_level(ISAMB_PP pp, ISAM_P *pos)
-{ /* climbs higher in the tree, until finds a level with data left */
- /* returns the node to (consider to) descend to in *pos) */
- struct ISAMB_block *p = pp->block[pp->level];
- const char *src;
-#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG, "isamb_pp_climb_level starting "
- "at level %d node %d ofs=%d sz=%d",
- pp->level, p->pos, p->offset, p->size);
-#endif
- assert(pp->level >= 0);
- assert(p->offset <= p->size);
- if (pp->level==0)
- {
-#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG, "isamb_pp_climb_level returning 0 at root");
-#endif
- return 0;
- }
- assert(pp->level>0);
- close_block(pp->isamb, pp->block[pp->level]);
- pp->block[pp->level] = 0;
- (pp->level)--;
- p = pp->block[pp->level];
-#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG, "isamb_pp_climb_level climbed to level %d node %d ofs=%d",
- pp->level, p->pos, p->offset);
-#endif
- assert(!p->leaf);
- assert(p->offset <= p->size);
- if (p->offset == p->size)
- {
- /* we came from the last pointer, climb on */
- if (!isamb_pp_climb_level(pp, pos))
- return 0;
- p = pp->block[pp->level];
- }
- else
- {
-#if INT_ENCODE
- char file_item_buf[DST_ITEM_MAX];
- char *file_item = file_item_buf;
- ISAMB b = pp->isamb;
- void *c1 = (*b->method->codec.start)();
-#else
- zint item_len;
-#endif
- /* skip the child we just came from */
-#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG, "isam_pp_climb_level: skipping lev=%d ofs=%d sz=%d",
- pp->level, p->offset, p->size);
-#endif
- assert(p->offset < p->size);
- src = p->bytes + p->offset;
-#if INT_ENCODE
- (*b->method->codec.decode)(c1, &file_item, &src);
- (*b->method->codec.stop)(c1);
-#else
- decode_item_len(&src, &item_len);
- src += item_len;
-#endif
- decode_ptr(&src, pos);
- p->offset = src - (char *)p->bytes;
-
- }
- return 1;
-} /* climb_level */
-
-
-static zint isamb_pp_forward_unode(ISAMB_PP pp, zint pos, const void *untilbuf)
-{ /* scans a upper node until it finds a child <= untilbuf */
- /* pp points to the key value, as always. pos is the child read from */
- /* the buffer */
- /* if all values are too small, returns the last child in the node */
- /* FIXME - this can be detected, and avoided by looking at the */
- /* parent node, but that gets messy. Presumably the cost is */
- /* pretty low anyway */
- ISAMB b = pp->isamb;
- struct ISAMB_block *p = pp->block[pp->level];
- const char *src = p->bytes + p->offset;
- int cmp;
- zint nxtpos;
-#if ISAMB_DEBUG
- int skips = 0;
- yaz_log(YLOG_DEBUG, "isamb_pp_forward_unode starting "
- "at level %d node %d ofs=%di sz=%d",
- pp->level, p->pos, p->offset, p->size);
-#endif
- assert(!p->leaf);
- assert(p->offset <= p->size);
- if (p->offset == p->size)
- {
-#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG, "isamb_pp_forward_unode returning at end "
- "at level %d node %d ofs=%di sz=%d",
- pp->level, p->pos, p->offset, p->size);
-#endif
- return pos; /* already at the end of it */
- }
- while(p->offset < p->size)
- {
-#if INT_ENCODE
- char file_item_buf[DST_ITEM_MAX];
- char *file_item = file_item_buf;
- void *c1 = (*b->method->codec.start)();
- (*b->method->codec.decode)(c1, &file_item, &src);
- (*b->method->codec.stop)(c1);
- cmp = (*b->method->compare_item)(untilbuf, file_item_buf);
-#else
- zint item_len;
- decode_item_len(&src, &item_len);
- cmp = (*b->method->compare_item)(untilbuf, src);
- src += item_len;
-#endif
- decode_ptr(&src, &nxtpos);
- if (cmp<pp->scope) /* cmp<2 */
- {
-#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG, "isamb_pp_forward_unode returning a hit "
- "at level %d node %d ofs=%d sz=%d",
- pp->level, p->pos, p->offset, p->size);
-#endif
- return pos;
- } /* found one */
- pos = nxtpos;
- p->offset = src-(char*)p->bytes;
- (pp->skipped_nodes[pp->maxlevel - pp->level -1])++;
-#if ISAMB_DEBUG
- skips++;
-#endif
- }
-#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG, "isamb_pp_forward_unode returning at tail "
- "at level %d node %d ofs=%d sz=%d skips=%d",
- pp->level, p->pos, p->offset, p->size, skips);
-#endif
- return pos; /* that's the last one in the line */
-
-} /* forward_unode */
-
-static void isamb_pp_descend_to_leaf(ISAMB_PP pp, ISAM_P pos,
- const void *untilbuf)
-{ /* climbs down the tree, from pos, to the leftmost leaf */
- struct ISAMB_block *p = pp->block[pp->level];
- const char *src;
- assert(!p->leaf);
-#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG, "isamb_pp_descend_to_leaf "
- "starting at lev %d node %d ofs=%d lf=%d u=%p",
- pp->level, p->pos, p->offset, p->leaf, untilbuf);
-#endif
- if (untilbuf)
- pos = isamb_pp_forward_unode(pp, pos, untilbuf);
- ++(pp->level);
- assert(pos);
- p = open_block(pp->isamb, pos);
- pp->block[pp->level] = p;
- ++(pp->accessed_nodes[pp->maxlevel-pp->level]);
- ++(pp->no_blocks);
-#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG, "isamb_pp_descend_to_leaf "
- "got lev %d node %d lf=%d",
- pp->level, p->pos, p->leaf);
-#endif
- if (p->leaf)
- return;
- assert(p->offset==0);
- src = p->bytes + p->offset;
- decode_ptr(&src, &pos);
- p->offset = src-(char*)p->bytes;
- isamb_pp_descend_to_leaf(pp, pos, untilbuf);
-#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG, "isamb_pp_descend_to_leaf "
- "returning at lev %d node %d ofs=%d lf=%d",
- pp->level, p->pos, p->offset, p->leaf);
-#endif
-} /* descend_to_leaf */
-
-static int isamb_pp_find_next_leaf(ISAMB_PP pp)
-{ /* finds the next leaf by climbing up and down */
- ISAM_P pos;
- if (!isamb_pp_climb_level(pp, &pos))
- return 0;
- isamb_pp_descend_to_leaf(pp, pos, 0);
- return 1;
-}
-
-static int isamb_pp_climb_desc(ISAMB_PP pp, const void *untilbuf)
-{ /* climbs up and descends to a leaf where values >= *untilbuf are found */
- ISAM_P pos;
-#if ISAMB_DEBUG
- struct ISAMB_block *p = pp->block[pp->level];
- yaz_log(YLOG_DEBUG, "isamb_pp_climb_desc starting "
- "at level %d node %d ofs=%d sz=%d",
- pp->level, p->pos, p->offset, p->size);
-#endif
- if (!isamb_pp_climb_level(pp, &pos))
- return 0;
- /* see if it would pay to climb one higher */
- if (!isamb_pp_on_right_node(pp, pp->level, untilbuf))
- if (!isamb_pp_climb_level(pp, &pos))
- return 0;
- isamb_pp_descend_to_leaf(pp, pos, untilbuf);
-#if ISAMB_DEBUG
- p = pp->block[pp->level];
- yaz_log(YLOG_DEBUG, "isamb_pp_climb_desc done "
- "at level %d node %d ofs=%d sz=%d",
- pp->level, p->pos, p->offset, p->size);
-#endif
- return 1;
-} /* climb_desc */
-
-int isamb_pp_forward(ISAMB_PP pp, void *buf, const void *untilbuf)
-{
-#if ISAMB_DEBUG
- struct ISAMB_block *p = pp->block[pp->level];
- assert(p->leaf);
- yaz_log(YLOG_DEBUG, "isamb_pp_forward starting "
- "at level %d node %d ofs=%d sz=%d u=%p sc=%d",
- pp->level, p->pos, p->offset, p->size, untilbuf, scope);
-#endif
- if (untilbuf)
- {
- if (isamb_pp_forward_on_leaf(pp, buf, untilbuf))
- {
-#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG, "isamb_pp_forward (f) returning (A) "
- "at level %d node %d ofs=%d sz=%d",
- pp->level, p->pos, p->offset, p->size);
-#endif
- return 1;
- }
- if (! isamb_pp_climb_desc(pp, untilbuf))
- {
-#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG, "isamb_pp_forward (f) returning notfound (B) "
- "at level %d node %d ofs=%d sz=%d",
- pp->level, p->pos, p->offset, p->size);
-#endif
- return 0; /* could not find a leaf */
- }
- do {
- if (isamb_pp_forward_on_leaf(pp, buf, untilbuf))
- {
-#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG, "isamb_pp_forward (f) returning (c) "
- "at level %d node %d ofs=%d sz=%d",
- pp->level, p->pos, p->offset, p->size);
-#endif
- return 1;
- }
- } while (isamb_pp_find_next_leaf(pp));
- return 0; /* could not find at all */
- }
- else { /* no untilbuf, a straight read */
- /* FIXME - this should be moved
- * directly into the pp_read */
- /* keeping here now, to keep same
- * interface as the old fwd */
- if (isamb_pp_read_on_leaf(pp, buf))
- {
-#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG, "isamb_pp_forward (read) returning (D) "
- "at level %d node %d ofs=%d sz=%d",
- pp->level, p->pos, p->offset, p->size);
-#endif
- return 1;
- }
- if (isamb_pp_find_next_leaf(pp))
- {
-#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG, "isamb_pp_forward (read) returning (E) "
- "at level %d node %d ofs=%d sz=%d",
- pp->level, p->pos, p->offset, p->size);
-#endif
- return isamb_pp_read_on_leaf(pp, buf);
- }
- else
- return 0;
- }
-} /* isam_pp_forward (new version) */
-
void isamb_pp_pos(ISAMB_PP pp, double *current, double *total)
{ /* return an estimate of the current position and of the total number of */
/* occureences in the isam tree, based on the current leaf */
assert(total);
assert(current);
-
+
/* if end-of-stream PP may not be leaf */
*total = (double) (pp->block[0]->no_items);
#endif
}
-int isamb_pp_forward2(ISAMB_PP pp, void *buf, const void *untilb)
+int isamb_pp_forward(ISAMB_PP pp, void *buf, const void *untilb)
{
char *dst = buf;
const char *src;
pp->block[pp->level] = 0;
(pp->level)--;
p = pp->block[pp->level];
- assert(!p->leaf);
+ assert(!p->leaf);
}
assert(!p->leaf);
src = p->bytes + p->offset;
-
+
#if INT_ENCODE
c1 = (*b->method->codec.start)();
(*b->method->codec.decode)(c1, &file_item, &src);
#else
decode_ptr(&src, &item_len);
src += item_len;
-#endif
+#endif
decode_ptr(&src, &pos);
p->offset = src - (char*) p->bytes;
pp->total_size += p->size;
pp->no_blocks++;
-
- if (p->leaf)
+
+ if (p->leaf)
{
break;
}
-
+
src = p->bytes + p->offset;
while(1)
{
decode_ptr(&src, &pos);
p->offset = src - (char*) p->bytes;
-
+
if (!untilb || p->offset == p->size)
break;
assert(p->offset < p->size);
dst = dst0;
if (p->offset == p->size) goto again;
}
+ pp->returned_numbers++;
return 1;
}
/*
* Local variables:
* c-basic-offset: 4
+ * c-file-style: "Stroustrup"
* indent-tabs-mode: nil
* End:
* vim: shiftwidth=4 tabstop=8 expandtab
projects / idzebra-moved-to-github.git / blobdiff