-/* $Id: isamb.c,v 1.63 2005-01-02 18:50:53 adam Exp $
+/* $Id: isamb.c,v 1.79 2005-04-25 10:45:28 adam Exp $
Copyright (C) 1995-2005
- Index Data Aps
+ Index Data ApS
This file is part of the Zebra server.
02111-1307, USA.
*/
+#include <stdlib.h>
#include <string.h>
#include <yaz/log.h>
#include <yaz/xmalloc.h>
#define ISAMB_DEBUG 0
#endif
-#define ISAMB_MAJOR_VERSION 2
+
+#define ISAMB_MAJOR_VERSION 3
#define ISAMB_MINOR_VERSION 0
struct ISAMB_head {
int block_offset;
};
+/* if 1, upper nodes items are encoded; 0 if not encoded */
+#define INT_ENCODE 1
+
/* maximum size of encoded buffer */
#define DST_ITEM_MAX 256
/* CAT_NO: <= CAT_MAX */
#define CAT_NO 4
-/* ISAMB_PTR_CODEC=1 var, =0 fixed */
+/* Smallest block size */
+#define ISAMB_MIN_SIZE 32
+/* Size factor */
+#define ISAMB_FAC_SIZE 4
+
+/* ISAMB_PTR_CODEC = 1 var, =0 fixed */
#define ISAMB_PTR_CODEC 1
struct ISAMB_cache_entry {
- ISAMB_P pos;
+ ISAM_P pos;
unsigned char *buf;
int dirty;
int hits;
struct ISAMB_file *file;
int no_cat;
- int cache; /* 0=no cache, 1=use cache, -1=dummy isam (for testing only) */
+ int cache; /* 0 = no cache, 1 = use cache, -1 = dummy isam (for testing only) */
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 skipped_nodes[ISAMB_MAX_LEVEL]; /* [0]=skipped leaves, 1=higher etc */
+ 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 {
- ISAMB_P pos;
+ ISAM_P pos;
int cat;
int size;
int leaf;
struct ISAMB_PP_s {
ISAMB isamb;
- ISAMB_P pos;
+ ISAM_P pos;
int level;
int maxlevel; /* total depth */
zint total_size;
zint no_blocks;
zint skipped_numbers; /* on a leaf node */
zint returned_numbers;
- zint skipped_nodes[ISAMB_MAX_LEVEL]; /* [0]=skipped leaves, 1=higher etc */
+ 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;
int scope; /* on what level we forward */
};
+#define encode_item_len encode_ptr
#if ISAMB_PTR_CODEC
-static void encode_ptr (char **dst, zint pos)
+static void encode_ptr(char **dst, zint pos)
{
unsigned char *bp = (unsigned char*) *dst;
while (pos > 127)
{
- *bp++ = 128 | (pos & 127);
+ *bp++ = (unsigned char) (128 | (pos & 127));
pos = pos >> 7;
}
- *bp++ = pos;
+ *bp++ = (unsigned char) pos;
*dst = (char *) bp;
}
#else
-static void encode_ptr (char **dst, zint pos)
+static void encode_ptr(char **dst, zint pos)
{
memcpy(*dst, &pos, sizeof(pos));
(*dst) += sizeof(pos);
}
#endif
+#define decode_item_len decode_ptr
#if ISAMB_PTR_CODEC
-static void decode_ptr (const char **src1, zint *pos)
+static void decode_ptr(const char **src1, zint *pos)
{
const unsigned char **src = (const unsigned char **) src1;
zint d = 0;
*pos = d;
}
#else
-static void decode_ptr (const char **src, zint *pos)
+static void decode_ptr(const char **src, zint *pos)
{
- memcpy (pos, *src, sizeof(*pos));
+ memcpy(pos, *src, sizeof(*pos));
(*src) += sizeof(*pos);
}
#endif
-ISAMB isamb_open (BFiles bfs, const char *name, int writeflag, ISAMC_M *method,
- int cache)
+ISAMB isamb_open(BFiles bfs, const char *name, int writeflag, ISAMC_M *method,
+ int cache)
{
- ISAMB isamb = xmalloc (sizeof(*isamb));
- int i, b_size = 32;
+ ISAMB isamb = xmalloc(sizeof(*isamb));
+ int i, b_size = ISAMB_MIN_SIZE;
isamb->bfs = bfs;
- isamb->method = (ISAMC_M *) xmalloc (sizeof(*method));
- memcpy (isamb->method, method, sizeof(*method));
+ isamb->method = (ISAMC_M *) xmalloc(sizeof(*method));
+ memcpy(isamb->method, method, sizeof(*method));
isamb->no_cat = CAT_NO;
isamb->log_io = 0;
isamb->log_freelist = 0;
isamb->cache = cache;
- isamb->skipped_numbers=0;
- isamb->returned_numbers=0;
- for (i=0;i<ISAMB_MAX_LEVEL;i++)
- isamb->skipped_nodes[i]= isamb->accessed_nodes[i]=0;
+ isamb->skipped_numbers = 0;
+ isamb->returned_numbers = 0;
+ for (i = 0; i<ISAMB_MAX_LEVEL; i++)
+ isamb->skipped_nodes[i] = isamb->accessed_nodes[i] = 0;
- assert (cache == 0);
- isamb->file = xmalloc (sizeof(*isamb->file) * isamb->no_cat);
+ assert(cache == 0);
+ isamb->file = xmalloc(sizeof(*isamb->file) * isamb->no_cat);
for (i = 0; i < isamb->no_cat; i++)
{
char fname[DST_BUF_SIZE];
char hbuf[DST_BUF_SIZE];
isamb->file[i].cache_entries = 0;
isamb->file[i].head_dirty = 0;
- sprintf (fname, "%s%c", name, i+'A');
+ sprintf(fname, "%s%c", name, i+'A');
if (cache)
- isamb->file[i].bf = bf_open (bfs, fname, ISAMB_CACHE_ENTRY_SIZE,
+ isamb->file[i].bf = bf_open(bfs, fname, ISAMB_CACHE_ENTRY_SIZE,
writeflag);
else
- isamb->file[i].bf = bf_open (bfs, fname, b_size, writeflag);
+ isamb->file[i].bf = bf_open(bfs, fname, b_size, writeflag);
/* fill-in default values (for empty isamb) */
isamb->file[i].head.first_block = ISAMB_CACHE_ENTRY_SIZE/b_size+1;
isamb->file[i].head.block_max =
b_size - isamb->file[i].head.block_offset;
isamb->file[i].head.free_list = 0;
- if (bf_read (isamb->file[i].bf, 0, 0, 0, hbuf))
+ if (bf_read(isamb->file[i].bf, 0, 0, 0, hbuf))
{
/* got header assume "isamb"major minor len can fit in 16 bytes */
zint zint_tmp;
for (left = len - b_size; left > 0; left = left - b_size)
{
pos++;
- if (!bf_read (isamb->file[i].bf, pos, 0, 0, hbuf + pos*b_size))
+ if (!bf_read(isamb->file[i].bf, pos, 0, 0, hbuf + pos*b_size))
{
yaz_log(YLOG_WARN, "truncated isamb header for "
"file=%s len=%d pos=%d",
decode_ptr(&src, &isamb->file[i].head.first_block);
decode_ptr(&src, &isamb->file[i].head.last_block);
decode_ptr(&src, &zint_tmp);
- isamb->file[i].head.block_size = zint_tmp;
+ isamb->file[i].head.block_size = (int) zint_tmp;
decode_ptr(&src, &zint_tmp);
- isamb->file[i].head.block_max = zint_tmp;
+ isamb->file[i].head.block_max = (int) zint_tmp;
decode_ptr(&src, &isamb->file[i].head.free_list);
}
assert (isamb->file[i].head.block_size >= isamb->file[i].head.block_offset);
isamb->file[i].head_dirty = 0;
assert(isamb->file[i].head.block_size == b_size);
- b_size = b_size * 4;
+ b_size = b_size * ISAMB_FAC_SIZE;
}
#if ISAMB_DEBUG
yaz_log(YLOG_WARN, "isamb debug enabled. Things will be slower than usual");
if (ce_this->dirty)
{
- yaz_log (b->log_io, "bf_write: flush_blocks");
- bf_write (b->file[cat].bf, ce_this->pos, 0, 0, ce_this->buf);
+ yaz_log(b->log_io, "bf_write: flush_blocks");
+ bf_write(b->file[cat].bf, ce_this->pos, 0, 0, ce_this->buf);
}
- xfree (ce_this->buf);
- xfree (ce_this);
+ xfree(ce_this->buf);
+ xfree(ce_this);
}
}
-static int get_block (ISAMB b, ISAMC_P pos, char *userbuf, int wr)
+static int cache_block (ISAMB b, ISAM_P pos, char *userbuf, int wr)
{
int cat = (int) (pos&CAT_MASK);
int off = (int) (((pos/CAT_MAX) &
*ce_last = 0; /* remove the last entry from list */
if (ce_this->dirty)
{
- yaz_log (b->log_io, "bf_write: get_block");
- bf_write (b->file[cat].bf, ce_this->pos, 0, 0, ce_this->buf);
+ yaz_log(b->log_io, "bf_write: cache_block");
+ bf_write(b->file[cat].bf, ce_this->pos, 0, 0, ce_this->buf);
}
- xfree (ce_this->buf);
- xfree (ce_this);
+ xfree(ce_this->buf);
+ xfree(ce_this);
}
- ce_this = xmalloc (sizeof(*ce_this));
+ ce_this = xmalloc(sizeof(*ce_this));
ce_this->next = b->file[cat].cache_entries;
b->file[cat].cache_entries = ce_this;
- ce_this->buf = xmalloc (ISAMB_CACHE_ENTRY_SIZE);
+ ce_this->buf = xmalloc(ISAMB_CACHE_ENTRY_SIZE);
ce_this->pos = norm;
- yaz_log (b->log_io, "bf_read: get_block");
- if (!bf_read (b->file[cat].bf, norm, 0, 0, ce_this->buf))
+ yaz_log(b->log_io, "bf_read: cache_block");
+ if (!bf_read(b->file[cat].bf, norm, 0, 0, ce_this->buf))
memset (ce_this->buf, 0, ISAMB_CACHE_ENTRY_SIZE);
if (wr)
{
void isamb_close (ISAMB isamb)
{
int i;
- for (i=0;isamb->accessed_nodes[i];i++)
- yaz_log(YLOG_DEBUG,"isamb_close level leaf-%d: "ZINT_FORMAT" read, "
+ for (i = 0; isamb->accessed_nodes[i]; i++)
+ yaz_log(YLOG_DEBUG, "isamb_close level leaf-%d: "ZINT_FORMAT" read, "
ZINT_FORMAT" skipped",
i, isamb->accessed_nodes[i], isamb->skipped_nodes[i]);
- yaz_log(YLOG_DEBUG,"isamb_close returned "ZINT_FORMAT" values, "
+ yaz_log(YLOG_DEBUG, "isamb_close returned "ZINT_FORMAT" values, "
"skipped "ZINT_FORMAT,
isamb->skipped_numbers, isamb->returned_numbers);
for (i = 0; i<isamb->no_cat; i++)
/* print exactly 16 bytes (including trailing 0) */
sprintf(hbuf, "isamb%02d %02d %02d\r\n", major, minor, len);
- bf_write (isamb->file[i].bf, pos, 0, 0, hbuf);
+ bf_write(isamb->file[i].bf, pos, 0, 0, hbuf);
for (left = len - b_size; left > 0; left = left - b_size)
{
pos++;
- bf_write (isamb->file[i].bf, pos, 0, 0, hbuf + pos*b_size);
+ bf_write(isamb->file[i].bf, pos, 0, 0, hbuf + pos*b_size);
}
}
bf_close (isamb->file[i].bf);
}
- xfree (isamb->file);
- xfree (isamb->method);
- xfree (isamb);
+ xfree(isamb->file);
+ xfree(isamb->method);
+ xfree(isamb);
}
/* open_block: read one block at pos.
* Reserve 5 bytes for large block sizes. 1 for small ones .. Number
of items. We can thus have at most 2^40 nodes.
*/
-static struct ISAMB_block *open_block (ISAMB b, ISAMC_P pos)
+static struct ISAMB_block *open_block(ISAMB b, ISAM_P pos)
{
int cat = (int) (pos&CAT_MASK);
const char *src;
struct ISAMB_block *p;
if (!pos)
return 0;
- p = xmalloc (sizeof(*p));
+ p = xmalloc(sizeof(*p));
p->pos = pos;
p->cat = (int) (pos & CAT_MASK);
- p->buf = xmalloc (b->file[cat].head.block_size);
+ p->buf = xmalloc(b->file[cat].head.block_size);
p->cbuf = 0;
- if (!get_block (b, pos, p->buf, 0))
+ if (!cache_block (b, pos, p->buf, 0))
{
- yaz_log (b->log_io, "bf_read: open_block");
- if (!bf_read (b->file[cat].bf, pos/CAT_MAX, 0, 0, p->buf))
+ yaz_log(b->log_io, "bf_read: open_block");
+ if (!bf_read(b->file[cat].bf, pos/CAT_MAX, 0, 0, p->buf))
{
- yaz_log (YLOG_FATAL, "isamb: read fail for pos=%ld block=%ld",
+ yaz_log(YLOG_FATAL, "isamb: read fail for pos=%ld block=%ld",
(long) pos, (long) pos/CAT_MAX);
abort();
}
p->size = (p->buf[1] + 256 * p->buf[2]) - offset;
if (p->size < 0)
{
- yaz_log (YLOG_FATAL, "Bad block size %d in pos=" ZINT_FORMAT "\n",
+ yaz_log(YLOG_FATAL, "Bad block size %d in pos=" ZINT_FORMAT "\n",
p->size, pos);
}
assert (p->size >= 0);
{
struct ISAMB_block *p;
- p = xmalloc (sizeof(*p));
- p->buf = xmalloc (b->file[cat].head.block_size);
+ p = xmalloc(sizeof(*p));
+ p->buf = xmalloc(b->file[cat].head.block_size);
if (!b->file[cat].head.free_list)
{
{
p->pos = b->file[cat].head.free_list;
assert((p->pos & CAT_MASK) == cat);
- if (!get_block (b, p->pos, p->buf, 0))
+ if (!cache_block (b, p->pos, p->buf, 0))
{
- yaz_log (b->log_io, "bf_read: new_block");
- if (!bf_read (b->file[cat].bf, p->pos/CAT_MAX, 0, 0, p->buf))
+ yaz_log(b->log_io, "bf_read: new_block");
+ if (!bf_read(b->file[cat].bf, p->pos/CAT_MAX, 0, 0, p->buf))
{
- yaz_log (YLOG_FATAL, "isamb: read fail for pos=%ld block=%ld",
+ yaz_log(YLOG_FATAL, "isamb: read fail for pos=%ld block=%ld",
(long) p->pos/CAT_MAX, (long) p->pos/CAT_MAX);
abort ();
}
}
- yaz_log (b->log_freelist, "got block " ZINT_FORMAT " from freelist %d:" ZINT_FORMAT, p->pos,
+ 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(int));
+ memcpy (&b->file[cat].head.free_list, p->buf, sizeof(zint));
}
p->cat = cat;
b->file[cat].head_dirty = 1;
char *startp = p->bytes;
const char *src = startp;
char *endp = p->bytes + p->size;
- ISAMB_P pos;
+ ISAM_P pos;
+ void *c1 = (*b->method->codec.start)();
- decode_ptr (&src, &pos);
+ decode_ptr(&src, &pos);
assert ((pos&CAT_MASK) == p->cat);
while (src != endp)
{
+#if INT_ENCODE
+ char file_item_buf[DST_ITEM_MAX];
+ char *file_item = file_item_buf;
+ (*b->method->codec.reset)(c1);
+ (*b->method->codec.decode)(c1, &file_item, &src);
+#else
zint item_len;
- decode_ptr (&src, &item_len);
+ decode_item_len(&src, &item_len);
assert (item_len > 0 && item_len < 80);
src += item_len;
- decode_ptr (&src, &pos);
+#endif
+ decode_ptr(&src, &pos);
if ((pos&CAT_MASK) != p->cat)
{
assert ((pos&CAT_MASK) == p->cat);
}
}
+ (*b->method->codec.stop)(c1);
}
}
-void close_block (ISAMB b, struct ISAMB_block *p)
+void close_block(ISAMB b, struct ISAMB_block *p)
{
if (!p)
return;
if (p->deleted)
{
- yaz_log (b->log_freelist, "release block " ZINT_FORMAT " from freelist %d:" ZINT_FORMAT,
+ yaz_log(b->log_freelist, "release block " ZINT_FORMAT " from freelist %d:" ZINT_FORMAT,
p->pos, p->cat, p->pos/CAT_MAX);
- memcpy (p->buf, &b->file[p->cat].head.free_list, sizeof(int));
+ memcpy (p->buf, &b->file[p->cat].head.free_list, sizeof(zint));
b->file[p->cat].head.free_list = p->pos;
- if (!get_block (b, p->pos, p->buf, 1))
+ if (!cache_block (b, p->pos, p->buf, 1))
{
- yaz_log (b->log_io, "bf_write: close_block (deleted)");
- bf_write (b->file[p->cat].bf, p->pos/CAT_MAX, 0, 0, p->buf);
+ yaz_log(b->log_io, "bf_write: close_block (deleted)");
+ bf_write(b->file[p->cat].bf, p->pos/CAT_MAX, 0, 0, p->buf);
}
}
else if (p->dirty)
p->buf[2] = size >> 8;
encode_ptr(&dst, p->no_items);
check_block(b, p);
- if (!get_block (b, p->pos, p->buf, 1))
+ if (!cache_block (b, p->pos, p->buf, 1))
{
- yaz_log (b->log_io, "bf_write: close_block");
- bf_write (b->file[p->cat].bf, p->pos/CAT_MAX, 0, 0, p->buf);
+ yaz_log(b->log_io, "bf_write: close_block");
+ bf_write(b->file[p->cat].bf, p->pos/CAT_MAX, 0, 0, p->buf);
}
}
(*b->method->codec.stop)(p->decodeClientData);
- xfree (p->buf);
- xfree (p);
+ xfree(p->buf);
+ xfree(p);
}
int insert_sub (ISAMB b, struct ISAMB_block **p,
char *startp = p->bytes;
const char *src = startp;
char *endp = p->bytes + p->size;
- ISAMB_P pos;
+ ISAM_P pos;
struct ISAMB_block *sub_p1 = 0, *sub_p2 = 0;
char sub_item[DST_ITEM_MAX];
int sub_size;
int more = 0;
zint diff_terms = 0;
+ void *c1 = (*b->method->codec.start)();
*sp = 0;
assert(p->size >= 0);
- decode_ptr (&src, &pos);
+ decode_ptr(&src, &pos);
while (src != endp)
{
- zint item_len;
int d;
const char *src0 = src;
- decode_ptr (&src, &item_len);
+#if INT_ENCODE
+ char file_item_buf[DST_ITEM_MAX];
+ char *file_item = file_item_buf;
+ (*b->method->codec.reset)(c1);
+ (*b->method->codec.decode)(c1, &file_item, &src);
+ d = (*b->method->compare_item)(file_item_buf, lookahead_item);
+ if (d > 0)
+ {
+ 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,
+ sub_item, &sub_size, file_item_buf);
+ diff_terms += sub_p1->no_items;
+ src = src0;
+ break;
+ }
+#else
+ zint item_len;
+ decode_item_len(&src, &item_len);
d = (*b->method->compare_item)(src, lookahead_item);
if (d > 0)
{
- sub_p1 = open_block (b, pos);
+ sub_p1 = open_block(b, pos);
assert (sub_p1);
diff_terms -= sub_p1->no_items;
more = insert_sub (b, &sub_p1, lookahead_item, mode,
break;
}
src += item_len;
- decode_ptr (&src, &pos);
+#endif
+ decode_ptr(&src, &pos);
}
if (!sub_p1)
{
- sub_p1 = open_block (b, pos);
+ /* we reached the end. So lookahead > last item */
+ 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,
/* there was a split - must insert pointer in this one */
char dst_buf[DST_BUF_SIZE];
char *dst = dst_buf;
-
+#if INT_ENCODE
+ const char *sub_item_ptr = sub_item;
+#endif
assert (sub_size < 80 && sub_size > 1);
memcpy (dst, startp, src - startp);
dst += src - startp;
- encode_ptr (&dst, sub_size); /* sub length and item */
+#if INT_ENCODE
+ (*b->method->codec.reset)(c1);
+ (*b->method->codec.encode)(c1, &dst, &sub_item_ptr);
+#else
+ encode_item_len (&dst, sub_size); /* sub length and item */
memcpy (dst, sub_item, sub_size);
dst += sub_size;
+#endif
- encode_ptr (&dst, sub_p2->pos); /* pos */
+ encode_ptr(&dst, sub_p2->pos); /* pos */
if (endp - src) /* remaining data */
{
if (p->size <= b->file[p->cat].head.block_max)
{
+ /* it fits OK in this block */
memcpy (startp, dst_buf, dst - dst_buf);
}
else
{
+ /* must split _this_ block as well .. */
struct ISAMB_block *sub_p3;
+#if INT_ENCODE
+ char file_item_buf[DST_ITEM_MAX];
+ char *file_item = file_item_buf;
+#else
zint split_size_tmp;
+#endif
zint no_items_first_half = 0;
int p_new_size;
const char *half;
endp = dst;
half = src + b->file[p->cat].head.block_size/2;
- decode_ptr (&src, &pos);
+ decode_ptr(&src, &pos);
/* read sub block so we can get no_items for it */
sub_p3 = open_block(b, pos);
while (src <= half)
{
- decode_ptr (&src, &split_size_tmp);
+#if INT_ENCODE
+ file_item = file_item_buf;
+ (*b->method->codec.reset)(c1);
+ (*b->method->codec.decode)(c1, &file_item, &src);
+#else
+ decode_item_len(&src, &split_size_tmp);
*split_size = (int) split_size_tmp;
-
src += *split_size;
- decode_ptr (&src, &pos);
+#endif
+ decode_ptr(&src, &pos);
/* read sub block so we can get no_items for it */
sub_p3 = open_block(b, pos);
p_new_size = src - dst_buf;
memcpy (p->bytes, dst_buf, p_new_size);
- decode_ptr (&src, &split_size_tmp);
+#if INT_ENCODE
+ file_item = file_item_buf;
+ (*b->method->codec.reset)(c1);
+ (*b->method->codec.decode)(c1, &file_item, &src);
+ *split_size = file_item - file_item_buf;
+ memcpy(split_item, file_item_buf, *split_size);
+#else
+ decode_item_len(&src, &split_size_tmp);
*split_size = (int) split_size_tmp;
memcpy (split_item, src, *split_size);
src += *split_size;
-
+#endif
/* *sp is second half */
*sp = new_int (b, p->cat);
(*sp)->size = endp - src;
p->no_items = no_items_first_half;
}
p->dirty = 1;
- close_block (b, sub_p2);
+ close_block(b, sub_p2);
}
- close_block (b, sub_p1);
+ close_block(b, sub_p1);
+ (*b->method->codec.stop)(c1);
return more;
}
int cut_item_size = 0;
int no_items = 0; /* number of items (total) */
int no_items_1 = 0; /* number of items (first half) */
+ int inserted_dst_bytes = 0;
if (p && p->size)
{
{
const char *dst_item = 0; /* resulting item to be inserted */
char *lookahead_next;
+ char *dst_0 = dst;
int d = -1;
if (lookahead_item)
/* if this is not an insertion, it's really bad .. */
if (!*lookahead_mode)
{
- yaz_log (YLOG_WARN, "isamb: Inconsistent register (1)");
+ yaz_log(YLOG_WARN, "isamb: Inconsistent register (1)");
assert (*lookahead_mode);
}
}
else
dst_item = file_item_buf;
-
if (!*lookahead_mode && d == 0)
{
/* it's a deletion and they match so there is nothing to be
{
/* we must move the lookahead pointer */
- if (dst > maxp)
+ inserted_dst_bytes += (dst - dst_0);
+ if (inserted_dst_bytes >= quater)
/* no more room. Mark lookahead as "gone".. */
lookahead_item = 0;
else
}
}
}
- maxp = dst_buf + b->file[b->no_cat-1].head.block_max + quater;
+
/* this loop runs when we are "appending" to a leaf page. That is
either it's empty (new) or all file items have been read in
previous loop */
+
+ maxp = dst_buf + b->file[b->no_cat-1].head.block_max + quater;
while (lookahead_item)
{
char *dst_item;
const char *src = lookahead_item;
char *dst_0 = dst;
- /* compare lookahead with max item */
+ /* 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)
{
if (!*lookahead_mode)
{
/* this is append. So a delete is bad */
- yaz_log (YLOG_WARN, "isamb: Inconsistent register (2)");
+ yaz_log(YLOG_WARN, "isamb: Inconsistent register (2)");
abort();
}
else if (!half1 && dst > tail_cut)
{
/* non-btree block will be removed */
p->deleted = 1;
- close_block (b, p);
+ close_block(b, p);
/* delete it too!! */
p = 0; /* make a new one anyway */
}
/* first half */
p->size = half1 - dst_buf;
+ assert(p->size <= b->file[p->cat].head.block_max);
memcpy (p->bytes, dst_buf, half1 - dst_buf);
p->no_items = no_items_1;
memcpy (first_dst, half2, dst - half2);
(*sp2)->size = (first_dst - (*sp2)->bytes) + (dst - half2);
+ assert((*sp2)->size <= b->file[p->cat].head.block_max);
(*sp2)->no_items = no_items - no_items_1;
(*sp2)->dirty = 1;
p->dirty = 1;
sub_size, max_item);
}
-int isamb_unlink (ISAMB b, ISAMC_P pos)
+int isamb_unlink (ISAMB b, ISAM_P pos)
{
struct ISAMB_block *p1;
if (!p1->leaf)
{
zint sub_p;
- zint item_len;
const char *src = p1->bytes + p1->offset;
-
+#if INT_ENCODE
+ void *c1 = (*b->method->codec.start)();
+#endif
decode_ptr(&src, &sub_p);
isamb_unlink(b, sub_p);
while (src != p1->bytes + p1->size)
{
- decode_ptr(&src, &item_len);
+#if INT_ENCODE
+ char file_item_buf[DST_ITEM_MAX];
+ char *file_item = file_item_buf;
+ (*b->method->codec.reset)(c1);
+ (*b->method->codec.decode)(c1, &file_item, &src);
+#else
+ zint item_len;
+ decode_item_len(&src, &item_len);
src += item_len;
+#endif
decode_ptr(&src, &sub_p);
isamb_unlink(b, sub_p);
}
+#if INT_ENCODE
+ (*b->method->codec.stop)(c1);
+#endif
}
close_block(b, p1);
return 0;
}
-ISAMB_P isamb_merge (ISAMB b, ISAMC_P pos, ISAMC_I *stream)
+void isamb_merge(ISAMB b, ISAM_P *pos, ISAMC_I *stream)
{
char item_buf[DST_ITEM_MAX];
char *item_ptr;
more =
(*stream->read_item)(stream->clientData, &item_ptr, &i_mode);
}
- return 1;
+ *pos = 1;
+ return;
}
item_ptr = item_buf;
more = (*stream->read_item)(stream->clientData, &item_ptr, &i_mode);
char sub_item[DST_ITEM_MAX];
int sub_size;
- if (pos)
- p = open_block (b, pos);
+ if (*pos)
+ p = open_block(b, *pos);
more = insert_sub (b, &p, item_buf, &i_mode, stream, &sp,
sub_item, &sub_size, 0);
if (sp)
{ /* increase level of tree by one */
struct ISAMB_block *p2 = new_int (b, p->cat);
char *dst = p2->bytes + p2->size;
-
- encode_ptr (&dst, p->pos);
- assert (sub_size < 40);
- encode_ptr (&dst, sub_size);
+#if INT_ENCODE
+ void *c1 = (*b->method->codec.start)();
+ const char *sub_item_ptr = sub_item;
+#endif
+
+ encode_ptr(&dst, p->pos);
+ assert (sub_size < 80 && sub_size > 1);
+#if INT_ENCODE
+ (*b->method->codec.reset)(c1);
+ (*b->method->codec.encode)(c1, &dst, &sub_item_ptr);
+#else
+ encode_item_len (&dst, sub_size);
memcpy (dst, sub_item, sub_size);
dst += sub_size;
- encode_ptr (&dst, sp->pos);
+#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 */
- close_block (b, sp);
- close_block (b, p2);
+ *pos = p2->pos; /* return new super page */
+ close_block(b, sp);
+ close_block(b, p2);
+#if INT_ENCODE
+ (*b->method->codec.stop)(c1);
+#endif
}
else
{
- pos = p->pos; /* return current one (again) */
+ *pos = p->pos; /* return current one (again) */
}
if (p->no_items == 0)
must_delete = 1;
else
must_delete = 0;
- close_block (b, p);
+ close_block(b, p);
}
if (must_delete)
{
- isamb_unlink(b, pos);
- return 0;
+ isamb_unlink(b, *pos);
+ *pos = 0;
}
- return pos;
}
-ISAMB_PP isamb_pp_open_x (ISAMB isamb, ISAMB_P pos, int *level, int scope)
+ISAMB_PP isamb_pp_open_x(ISAMB isamb, ISAM_P pos, int *level, int scope)
{
- ISAMB_PP pp = xmalloc (sizeof(*pp));
+ ISAMB_PP pp = xmalloc(sizeof(*pp));
int i;
assert(pos);
pp->isamb = isamb;
- pp->block = xmalloc (ISAMB_MAX_LEVEL * sizeof(*pp->block));
+ pp->block = xmalloc(ISAMB_MAX_LEVEL * sizeof(*pp->block));
pp->pos = pos;
pp->level = 0;
- pp->maxlevel=0;
+ pp->maxlevel = 0;
pp->total_size = 0;
pp->no_blocks = 0;
- pp->skipped_numbers=0;
- pp->returned_numbers=0;
- pp->scope=scope;
- for (i=0;i<ISAMB_MAX_LEVEL;i++)
- pp->skipped_nodes[i] = pp->accessed_nodes[i]=0;
+ pp->skipped_numbers = 0;
+ pp->returned_numbers = 0;
+ pp->scope = scope;
+ for (i = 0; i<ISAMB_MAX_LEVEL; i++)
+ pp->skipped_nodes[i] = pp->accessed_nodes[i] = 0;
while (1)
{
- struct ISAMB_block *p = open_block (isamb, pos);
+ struct ISAMB_block *p = open_block(isamb, pos);
const char *src = p->bytes + p->offset;
pp->block[pp->level] = p;
pp->no_blocks++;
if (p->leaf)
break;
- decode_ptr (&src, &pos);
+ decode_ptr(&src, &pos);
p->offset = src - p->bytes;
pp->level++;
pp->accessed_nodes[pp->level]++;
}
pp->block[pp->level+1] = 0;
- pp->maxlevel=pp->level;
+ pp->maxlevel = pp->level;
if (level)
*level = pp->level;
return pp;
}
-ISAMB_PP isamb_pp_open (ISAMB isamb, ISAMB_P pos, int scope)
+ISAMB_PP isamb_pp_open (ISAMB isamb, ISAM_P pos, int scope)
{
- return isamb_pp_open_x (isamb, pos, 0, scope);
+ return isamb_pp_open_x(isamb, pos, 0, scope);
}
-void isamb_pp_close_x (ISAMB_PP pp, int *size, int *blocks)
+void isamb_pp_close_x(ISAMB_PP pp, zint *size, zint *blocks)
{
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--)
- if ( pp->skipped_nodes[i] || pp->accessed_nodes[i])
- yaz_log(YLOG_DEBUG,"isamb_pp_close level leaf-%d: "
+ for (i = pp->maxlevel; i>=0; i--)
+ if (pp->skipped_nodes[i] || pp->accessed_nodes[i])
+ yaz_log(YLOG_DEBUG, "isamb_pp_close level leaf-%d: "
ZINT_FORMAT" read, "ZINT_FORMAT" skipped", i,
pp->accessed_nodes[i], pp->skipped_nodes[i]);
pp->isamb->skipped_numbers += pp->skipped_numbers;
pp->isamb->returned_numbers += pp->returned_numbers;
- for (i=pp->maxlevel;i>=0;i--)
+ for (i = pp->maxlevel; i>=0; i--)
{
pp->isamb->accessed_nodes[i] += pp->accessed_nodes[i];
pp->isamb->skipped_nodes[i] += pp->skipped_nodes[i];
if (blocks)
*blocks = pp->no_blocks;
for (i = 0; i <= pp->level; i++)
- close_block (pp->isamb, pp->block[i]);
- xfree (pp->block);
- xfree (pp);
+ close_block(pp->isamb, pp->block[i]);
+ xfree(pp->block);
+ xfree(pp);
}
int isamb_block_info (ISAMB isamb, int cat)
void isamb_pp_close (ISAMB_PP pp)
{
- isamb_pp_close_x (pp, 0, 0);
+ isamb_pp_close_x(pp, 0, 0);
}
/* simple recursive dumper .. */
-static void isamb_dump_r (ISAMB b, ISAMB_P pos, void (*pr)(const char *str),
+static void isamb_dump_r (ISAMB b, ISAM_P pos, void (*pr)(const char *str),
int level)
{
char buf[1024];
char prefix_str[1024];
if (pos)
{
- struct ISAMB_block *p = open_block (b, pos);
+ struct ISAMB_block *p = open_block(b, pos);
sprintf(prefix_str, "%*s " ZINT_FORMAT " cat=%d size=%d max=%d items="
ZINT_FORMAT, level*2, "",
pos, p->cat, p->size, b->file[p->cat].head.block_max,
else
{
const char *src = p->bytes + p->offset;
- ISAMB_P sub;
- zint item_len;
+ ISAM_P sub;
- decode_ptr (&src, &sub);
+ decode_ptr(&src, &sub);
p->offset = src - (char*) p->bytes;
isamb_dump_r(b, sub, pr, level+1);
while (p->offset < p->size)
{
- decode_ptr (&src, &item_len);
+#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);
+ (*b->method->log_item)(YLOG_DEBUG, file_item_buf, prefix_str);
+#else
+ zint item_len;
+ decode_item_len(&src, &item_len);
(*b->method->log_item)(YLOG_DEBUG, src, prefix_str);
src += item_len;
- decode_ptr (&src, &sub);
+#endif
+ decode_ptr(&src, &sub);
p->offset = src - (char*) p->bytes;
isamb_dump_r(b, sub, pr, level+1);
}
}
- close_block(b,p);
+ close_block(b, p);
}
}
-void isamb_dump (ISAMB b, ISAMB_P pos, void (*pr)(const char *str))
+void isamb_dump(ISAMB b, ISAM_P pos, void (*pr)(const char *str))
{
isamb_dump_r(b, pos, pr, 0);
}
-int isamb_pp_read (ISAMB_PP pp, void *buf)
+int isamb_pp_read(ISAMB_PP pp, void *buf)
{
return isamb_pp_forward(pp, buf, 0);
}
struct ISAMB_block *p;
int cmp;
const char *src;
- zint item_len;
- assert(level>=0);
- if ( level == 0) {
+ 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");
+ 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];
+ p = pp->block[level];
assert(p->offset <= p->size);
- if (p->offset < p->size )
+ if (p->offset < p->size)
{
- assert(p->offset>0);
- src=p->bytes + p->offset;
- decode_ptr(&src, &item_len);
+#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
- (*pp->isamb->method->codec.log_item)(YLOG_DEBUG,untilbuf,"on_leaf: until");
- (*pp->isamb->method->codec.log_item)(YLOG_DEBUG,src,"on_leaf: value");
+ (*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
- cmp=(*pp->isamb->method->compare_item)(untilbuf,src);
- if (cmp<pp->scope) { /* cmp<2 */
+ 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);
+ yaz_log(YLOG_DEBUG, "isamb_pp_on_right returning true "
+ "cmp=%d lev=%d ofs=%d", cmp, level, p->offset);
#endif
return 1;
}
- else {
+ else
+ {
#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG,"isamb_pp_on_right returning false "
- "cmp=%d lev=%d ofs=%d",cmp,level,p->offset);
+ 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);
+ 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*/
+{
+ /* 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 (p->offset == p->size)
+ {
#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG,"isamb_pp_read_on_leaf returning 0 on node %d",p->pos);
+ 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);
+ 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");
+ (*pp->isamb->method->codec.log_item)(YLOG_DEBUG, buf,
+ "read_on_leaf returning 1");
#endif
pp->returned_numbers++;
return 1;
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))
+ 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 */
+ 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);
+ yaz_log(YLOG_DEBUG, "isam_pp_fwd_on_leaf skipped %d items", skips);
#endif
pp->returned_numbers++;
return 1;
}
} /* forward_on_leaf */
-static int isamb_pp_climb_level(ISAMB_PP pp, ISAMB_P *pos)
+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;
- zint item_len;
#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG,"isamb_pp_climb_level starting "
+ 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
if (pp->level==0)
{
#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG,"isamb_pp_climb_level returning 0 at root");
+ 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->block[pp->level] = 0;
(pp->level)--;
- p=pp->block[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",
+ 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 ) {
+ if (p->offset == p->size)
+ {
/* we came from the last pointer, climb on */
- if (!isamb_pp_climb_level(pp,pos))
+ if (!isamb_pp_climb_level(pp, pos))
return 0;
- p=pp->block[pp->level];
+ 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",
+ 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;
- decode_ptr(&src, &item_len);
+ 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;
+ p->offset = src - (char *)p->bytes;
}
return 1;
/* 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;
- zint item_len;
+ 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 "
+ 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 (p->offset == p->size)
+ {
#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG,"isamb_pp_forward_unode returning at end "
+ 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) {
- decode_ptr(&src,&item_len);
- cmp=(*pp->isamb->method->compare_item)(untilbuf,src);
- src+=item_len;
- decode_ptr(&src,&nxtpos);
+ 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 "
+ 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;
+ 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 "
+ 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
} /* forward_unode */
-static void isamb_pp_descend_to_leaf(ISAMB_PP pp, ISAMB_P pos, const void *untilbuf)
+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 "
+ 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);
+ pos = isamb_pp_forward_unode(pp, pos, untilbuf);
++(pp->level);
assert(pos);
- p=open_block(pp->isamb, pos);
- pp->block[pp->level]=p;
+ 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 "
+ 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;
+ 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);
+ 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 "
+ 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
static int isamb_pp_find_next_leaf(ISAMB_PP pp)
{ /* finds the next leaf by climbing up and down */
- ISAMB_P pos;
- if (!isamb_pp_climb_level(pp,&pos))
+ ISAM_P pos;
+ if (!isamb_pp_climb_level(pp, &pos))
return 0;
- isamb_pp_descend_to_leaf(pp, pos,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 */
- ISAMB_P pos;
+ ISAM_P pos;
#if ISAMB_DEBUG
struct ISAMB_block *p = pp->block[pp->level];
- yaz_log(YLOG_DEBUG,"isamb_pp_climb_desc starting "
+ 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))
+ 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))
+ if (!isamb_pp_climb_level(pp, &pos))
return 0;
- isamb_pp_descend_to_leaf(pp, pos,untilbuf);
+ 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 "
+ 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
#if ISAMB_DEBUG
struct ISAMB_block *p = pp->block[pp->level];
assert(p->leaf);
- yaz_log(YLOG_DEBUG,"isamb_pp_forward starting "
+ 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);
+ pp->level, p->pos, p->offset, p->size, untilbuf, scope);
#endif
- if (untilbuf) {
- if (isamb_pp_forward_on_leaf( pp, buf, untilbuf)) {
+ if (untilbuf)
+ {
+ if (isamb_pp_forward_on_leaf(pp, buf, untilbuf))
+ {
#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG,"isamb_pp_forward (f) returning (A) "
+ 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_pp_climb_desc(pp, untilbuf))
+ {
#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG,"isamb_pp_forward (f) returning notfound (B) "
+ 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)) {
+ 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);
+ 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));
+ } while (isamb_pp_find_next_leaf(pp));
return 0; /* could not find at all */
}
else { /* no untilbuf, a straight read */
* 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_pp_read_on_leaf(pp, buf))
+ {
#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG,"isamb_pp_forward (read) returning (D) "
+ 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_pp_find_next_leaf(pp))
+ {
#if ISAMB_DEBUG
- yaz_log(YLOG_DEBUG,"isamb_pp_forward (read) returning (E) "
+ 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
}
} /* isam_pp_forward (new version) */
-void isamb_pp_pos( ISAMB_PP pp, double *current, double *total )
+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 */
- struct ISAMB_block *p = pp->block[pp->level];
assert(total);
assert(current);
- assert(p->leaf);
+
+ /* if end-of-stream PP may not be leaf */
- *total = pp->block[0]->no_items;
+ *total = (double) (pp->block[0]->no_items);
*current = (double) pp->returned_numbers;
#if ISAMB_DEBUG
yaz_log(YLOG_LOG, "isamb_pp_pos returning: cur= %0.1f tot=%0.1f rn="
ZINT_FORMAT, *current, *total, pp->returned_numbers);
#endif
}
+
+int isamb_pp_forward2(ISAMB_PP pp, void *buf, const void *untilb)
+{
+ char *dst = buf;
+ const char *src;
+ struct ISAMB_block *p = pp->block[pp->level];
+ ISAMB b = pp->isamb;
+ if (!p)
+ return 0;
+again:
+ while (p->offset == p->size)
+ {
+ ISAM_P pos;
+#if INT_ENCODE
+ const char *src_0;
+ void *c1;
+ char file_item_buf[DST_ITEM_MAX];
+ char *file_item = file_item_buf;
+#else
+ zint item_len;
+#endif
+ while (p->offset == p->size)
+ {
+ if (pp->level == 0)
+ return 0;
+ close_block (pp->isamb, pp->block[pp->level]);
+ pp->block[pp->level] = 0;
+ (pp->level)--;
+ p = pp->block[pp->level];
+ 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
+ decode_ptr (&src, &pos);
+ p->offset = src - (char*) p->bytes;
+
+ src = p->bytes + p->offset;
+
+ while(1)
+ {
+ if (!untilb || p->offset == p->size)
+ break;
+ assert(p->offset < p->size);
+#if INT_ENCODE
+ src_0 = src;
+ file_item = file_item_buf;
+ (*b->method->codec.reset)(c1);
+ (*b->method->codec.decode)(c1, &file_item, &src);
+ if ((*b->method->compare_item)(untilb, file_item_buf) <= 1)
+ {
+ src = src_0;
+ break;
+ }
+#else
+ decode_item_len(&src, &item_len);
+ if ((*b->method->compare_item)(untilb, src) <= 1)
+ break;
+ src += item_len;
+#endif
+ decode_ptr (&src, &pos);
+ p->offset = src - (char*) p->bytes;
+ }
+
+ pp->level++;
+
+ while (1)
+ {
+ pp->block[pp->level] = p = open_block (pp->isamb, pos);
+
+ pp->total_size += p->size;
+ pp->no_blocks++;
+
+ 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);
+#if INT_ENCODE
+ src_0 = src;
+ file_item = file_item_buf;
+ (*b->method->codec.reset)(c1);
+ (*b->method->codec.decode)(c1, &file_item, &src);
+ if ((*b->method->compare_item)(untilb, file_item_buf) <= 1)
+ {
+ src = src_0;
+ break;
+ }
+#else
+ decode_ptr (&src, &item_len);
+ if ((*b->method->compare_item)(untilb, src) <= 1)
+ break;
+ src += item_len;
+#endif
+ }
+ pp->level++;
+ }
+#if INT_ENCODE
+ (*b->method->codec.stop)(c1);
+#endif
+ }
+ assert (p->offset < p->size);
+ assert (p->leaf);
+ while(1)
+ {
+ char *dst0 = dst;
+ src = p->bytes + p->offset;
+ (*pp->isamb->method->codec.decode)(p->decodeClientData, &dst, &src);
+ p->offset = src - (char*) p->bytes;
+ if (!untilb || (*pp->isamb->method->compare_item)(untilb, dst0) <= 1)
+ break;
+ dst = dst0;
+ if (p->offset == p->size) goto again;
+ }
+ return 1;
+}