X-Git-Url: http://git.indexdata.com/?p=idzebra-moved-to-github.git;a=blobdiff_plain;f=isamb%2Fisamb.c;h=cf96bb515ebc857b1ad53acdaaa9db5210efb20a;hp=4fa613a79d0dbaade6b784bb3f8f6f3eeeeacab5;hb=e4c6861efeeea654bfb00c5f0239ee258629d77f;hpb=26a5a4b96b90361859cf856d6c41852b03ca2f84 diff --git a/isamb/isamb.c b/isamb/isamb.c index 4fa613a..cf96bb5 100644 --- a/isamb/isamb.c +++ b/isamb/isamb.c @@ -1,8 +1,5 @@ -/* $Id: isamb.c,v 1.22 2003-02-04 12:06:47 pop Exp $ - Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002 - 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 @@ -15,43 +12,78 @@ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License -along with Zebra; see the file LICENSE.zebra. If not, write to the -Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA -02111-1307, USA. +along with this program; if not, write to the Free Software +Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ +#if HAVE_CONFIG_H +#include +#endif +#include #include -#include #include -#include +#include +#include #include +#ifndef ISAMB_DEBUG +#define ISAMB_DEBUG 0 +#endif + + +#define ISAMB_MAJOR_VERSION 3 +#define ISAMB_MINOR_VERSION_NO_ROOT 0 +#define ISAMB_MINOR_VERSION_WITH_ROOT 1 + struct ISAMB_head { - int first_block; - int last_block; + zint first_block; + zint last_block; + zint free_list; + zint no_items; int block_size; int block_max; - int free_list; + int block_offset; }; -#define ISAMB_DATA_OFFSET 3 +/* if 1, upper nodes items are encoded; 0 if not encoded */ +#define INT_ENCODE 1 -#define DST_ITEM_MAX 256 +/* maximum size of encoded buffer */ +#define DST_ITEM_MAX 5000 -/* approx 2*4 K + max size of item */ -#define DST_BUF_SIZE 8448 +/* max page size for _any_ isamb use */ +#define ISAMB_MAX_PAGE 32768 -#define ISAMB_CACHE_ENTRY_SIZE 4096 +#define ISAMB_MAX_LEVEL 10 +/* approx 2*max page + max size of item */ +#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 ISAMB_MAX_PAGE + +/* CAT_MAX: _must_ be power of 2 */ +#define CAT_MAX 4 +#define CAT_MASK (CAT_MAX-1) +/* CAT_NO: <= CAT_MAX */ +#define CAT_NO 4 + +/* 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; - char *buf; + ISAM_P pos; + unsigned char *buf; int dirty; int hits; struct ISAMB_cache_entry *next; }; - struct ISAMB_file { BFile bf; int head_dirty; @@ -61,24 +93,36 @@ struct ISAMB_file { struct ISAMB_s { BFiles bfs; - ISAMC_M method; + ISAMC_M *method; 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 accessed_nodes[ISAMB_MAX_LEVEL]; /* nodes we did not skip */ + zint number_of_int_splits; + zint number_of_leaf_splits; + int enable_int_count; /* whether we count nodes (or not) */ + int cache_size; /* size of blocks to cache (if cache=1) */ + int minor_version; + zint root_ptr; }; struct ISAMB_block { - ISAMB_P pos; + ISAM_P pos; int cat; int size; int leaf; int dirty; int deleted; int offset; + zint no_items; /* number of nodes in this + children */ char *bytes; + char *cbuf; unsigned char *buf; void *decodeClientData; int log_rw; @@ -86,70 +130,239 @@ struct ISAMB_block { struct ISAMB_PP_s { ISAMB isamb; - ISAMB_P pos; + ISAM_P pos; int level; - int total_size; - int no_blocks; + 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 accessed_nodes[ISAMB_MAX_LEVEL]; /* nodes we did not skip */ struct ISAMB_block **block; + int scope; /* on what level we forward */ }; -void encode_ptr (char **dst, int pos) + +#define encode_item_len encode_ptr +#if ISAMB_PTR_CODEC +static void encode_ptr(char **dst, zint pos) { - memcpy (*dst, &pos, sizeof(pos)); + unsigned char *bp = (unsigned char*) *dst; + + while (pos > 127) + { + *bp++ = (unsigned char) (128 | (pos & 127)); + pos = pos >> 7; + } + *bp++ = (unsigned char) pos; + *dst = (char *) bp; +} +#else +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 **src, zint *pos) +{ + zint d = 0; + unsigned char c; + unsigned r = 0; -void decode_ptr (char **src, int *pos) + while (((c = *(const unsigned char *)((*src)++)) & 128)) + { + d += ((zint) (c & 127) << r); + r += 7; + } + d += ((zint) c << r); + *pos = d; +} +#else +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) +void isamb_set_int_count(ISAMB b, int v) { - ISAMB isamb = xmalloc (sizeof(*isamb)); - int i, b_size = 32; + b->enable_int_count = v; +} + +void isamb_set_cache_size(ISAMB b, int v) +{ + b->cache_size = v; +} + +ISAMB isamb_open2(BFiles bfs, const char *name, int writeflag, ISAMC_M *method, + int cache, int no_cat, int *sizes, int use_root_ptr) +{ + ISAMB isamb = xmalloc(sizeof(*isamb)); + int i; + + assert(no_cat <= CAT_MAX); isamb->bfs = bfs; - isamb->method = (ISAMC_M) xmalloc (sizeof(*method)); - memcpy (isamb->method, method, sizeof(*method)); - isamb->no_cat = 4; + isamb->method = (ISAMC_M *) xmalloc(sizeof(*method)); + memcpy(isamb->method, method, sizeof(*method)); + isamb->no_cat = no_cat; isamb->log_io = 0; + isamb->log_freelist = 0; isamb->cache = cache; + isamb->skipped_numbers = 0; + isamb->returned_numbers = 0; + isamb->number_of_int_splits = 0; + isamb->number_of_leaf_splits = 0; + isamb->enable_int_count = 1; + isamb->cache_size = 40; + + if (use_root_ptr) + isamb->minor_version = ISAMB_MINOR_VERSION_WITH_ROOT; + else + isamb->minor_version = ISAMB_MINOR_VERSION_NO_ROOT; - isamb->file = xmalloc (sizeof(*isamb->file) * isamb->no_cat); - for (i = 0; ino_cat; i++) + isamb->root_ptr = 0; + + for (i = 0; iskipped_nodes[i] = isamb->accessed_nodes[i] = 0; + + if (cache == -1) { - char fname[DST_BUF_SIZE]; - isamb->file[i].cache_entries = 0; + yaz_log(YLOG_WARN, "isamb_open %s. Degraded TEST mode", name); + } + else + { + assert(cache == 0 || cache == 1); + } + isamb->file = xmalloc(sizeof(*isamb->file) * isamb->no_cat); + + for (i = 0; i < isamb->no_cat; i++) + { + isamb->file[i].bf = 0; isamb->file[i].head_dirty = 0; - sprintf (fname, "%s%c", name, i+'A'); + isamb->file[i].cache_entries = 0; + } + + for (i = 0; i < isamb->no_cat; i++) + { + char fname[DST_BUF_SIZE]; + char hbuf[DST_BUF_SIZE]; + + sprintf(fname, "%s%c", name, i+'A'); if (cache) - isamb->file[i].bf = bf_open (bfs, fname, ISAMB_CACHE_ENTRY_SIZE, - writeflag); + 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, sizes[i], writeflag); + + if (!isamb->file[i].bf) + { + isamb_close(isamb); + return 0; + } - - if (!bf_read (isamb->file[i].bf, 0, 0, sizeof(struct ISAMB_head), - &isamb->file[i].head)) + /* fill-in default values (for empty isamb) */ + isamb->file[i].head.first_block = ISAMB_CACHE_ENTRY_SIZE/sizes[i]+1; + isamb->file[i].head.last_block = isamb->file[i].head.first_block; + isamb->file[i].head.block_size = sizes[i]; + assert(sizes[i] <= ISAMB_CACHE_ENTRY_SIZE); +#if ISAMB_PTR_CODEC + if (i == isamb->no_cat-1 || sizes[i] > 128) + isamb->file[i].head.block_offset = 8; + else + isamb->file[i].head.block_offset = 4; +#else + isamb->file[i].head.block_offset = 11; +#endif + isamb->file[i].head.block_max = + sizes[i] - isamb->file[i].head.block_offset; + isamb->file[i].head.free_list = 0; + if (bf_read(isamb->file[i].bf, 0, 0, 0, hbuf)) { - isamb->file[i].head.first_block = ISAMB_CACHE_ENTRY_SIZE/b_size+1; - isamb->file[i].head.last_block = isamb->file[i].head.first_block; - isamb->file[i].head.block_size = b_size; - isamb->file[i].head.block_max = b_size - ISAMB_DATA_OFFSET; - isamb->file[i].head.free_list = 0; + /* got header assume "isamb"major minor len can fit in 16 bytes */ + zint zint_tmp; + int major, minor, len, pos = 0; + int left; + const char *src = 0; + if (memcmp(hbuf, "isamb", 5)) + { + yaz_log(YLOG_WARN, "bad isamb header for file %s", fname); + isamb_close(isamb); + return 0; + } + if (sscanf(hbuf+5, "%d %d %d", &major, &minor, &len) != 3) + { + yaz_log(YLOG_WARN, "bad isamb header for file %s", fname); + isamb_close(isamb); + return 0; + } + if (major != ISAMB_MAJOR_VERSION) + { + yaz_log(YLOG_WARN, "bad major version for file %s %d, must be %d", + fname, major, ISAMB_MAJOR_VERSION); + isamb_close(isamb); + return 0; + } + for (left = len - sizes[i]; left > 0; left = left - sizes[i]) + { + pos++; + if (!bf_read(isamb->file[i].bf, pos, 0, 0, hbuf + pos*sizes[i])) + { + yaz_log(YLOG_WARN, "truncated isamb header for " + "file=%s len=%d pos=%d", + fname, len, pos); + isamb_close(isamb); + return 0; + } + } + src = hbuf + 16; + 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 = (int) zint_tmp; + decode_ptr(&src, &zint_tmp); + isamb->file[i].head.block_max = (int) zint_tmp; + decode_ptr(&src, &isamb->file[i].head.free_list); + if (isamb->minor_version >= ISAMB_MINOR_VERSION_WITH_ROOT) + decode_ptr(&src, &isamb->root_ptr); } - assert (isamb->file[i].head.block_size >= ISAMB_DATA_OFFSET); - isamb->file[i].head_dirty = 0; - assert(isamb->file[i].head.block_size == b_size); - b_size = b_size * 4; + assert(isamb->file[i].head.block_size >= isamb->file[i].head.block_offset); + /* must rewrite the header if root ptr is in use (bug #1017) */ + if (use_root_ptr && writeflag) + isamb->file[i].head_dirty = 1; + else + isamb->file[i].head_dirty = 0; + assert(isamb->file[i].head.block_size == sizes[i]); } +#if ISAMB_DEBUG + yaz_log(YLOG_WARN, "isamb debug enabled. Things will be slower than usual"); +#endif return isamb; } -static void flush_blocks (ISAMB b, int cat) +ISAMB isamb_open(BFiles bfs, const char *name, int writeflag, ISAMC_M *method, + int cache) +{ + int sizes[CAT_NO]; + int i, b_size = ISAMB_MIN_SIZE; + + for (i = 0; ifile[cat].cache_entries) { @@ -158,28 +371,28 @@ static void flush_blocks (ISAMB b, int cat) 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, unsigned char *userbuf, int wr) { - int cat = pos&3; - int off = ((pos/4) & - (ISAMB_CACHE_ENTRY_SIZE / b->file[cat].head.block_size - 1)) - * b->file[cat].head.block_size; - int norm = pos / (4*ISAMB_CACHE_ENTRY_SIZE / b->file[cat].head.block_size); + int cat = (int) (pos&CAT_MASK); + 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); int no = 0; struct ISAMB_cache_entry **ce, *ce_this = 0, **ce_last = 0; if (!b->cache) return 0; - assert (ISAMB_CACHE_ENTRY_SIZE >= b->file[cat].head.block_size); + assert(ISAMB_CACHE_ENTRY_SIZE >= b->file[cat].head.block_size); for (ce = &b->file[cat].cache_entries; *ce; ce = &(*ce)->next, no++) { ce_last = ce; @@ -187,398 +400,663 @@ static int get_block (ISAMB b, ISAMC_P pos, char *userbuf, int wr) { 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, - b->file[cat].head.block_size); + memcpy(ce_this->buf + off, userbuf, + b->file[cat].head.block_size); ce_this->dirty = 1; } else - memcpy (userbuf, ce_this->buf + off, - b->file[cat].head.block_size); + memcpy(userbuf, ce_this->buf + off, + b->file[cat].head.block_size); return 1; } } - if (no >= 40) + if (no >= b->cache_size) { - assert (no == 40); - assert (ce_last && *ce_last); + assert(ce_last && *ce_last); ce_this = *ce_last; *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)) - memset (ce_this->buf, 0, ISAMB_CACHE_ENTRY_SIZE); + 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) { - memcpy (ce_this->buf + off, userbuf, b->file[cat].head.block_size); + memcpy(ce_this->buf + off, userbuf, b->file[cat].head.block_size); ce_this->dirty = 1; } else { ce_this->dirty = 0; - memcpy (userbuf, ce_this->buf + off, b->file[cat].head.block_size); + memcpy(userbuf, ce_this->buf + off, b->file[cat].head.block_size); } return 1; } -void isamb_close (ISAMB isamb) +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, " + ZINT_FORMAT" skipped", + i, isamb->accessed_nodes[i], isamb->skipped_nodes[i]); + yaz_log(YLOG_DEBUG, "isamb_close returned "ZINT_FORMAT" values, " + "skipped "ZINT_FORMAT, + isamb->skipped_numbers, isamb->returned_numbers); + for (i = 0; ino_cat; i++) { - flush_blocks (isamb, i); + flush_blocks(isamb, i); if (isamb->file[i].head_dirty) - bf_write (isamb->file[i].bf, 0, 0, - sizeof(struct ISAMB_head), &isamb->file[i].head); - + { + char hbuf[DST_BUF_SIZE]; + int major = ISAMB_MAJOR_VERSION; + int len = 16; + char *dst = hbuf + 16; + int pos = 0, left; + int b_size = isamb->file[i].head.block_size; + + encode_ptr(&dst, isamb->file[i].head.first_block); + encode_ptr(&dst, isamb->file[i].head.last_block); + encode_ptr(&dst, isamb->file[i].head.block_size); + encode_ptr(&dst, isamb->file[i].head.block_max); + encode_ptr(&dst, isamb->file[i].head.free_list); + + if (isamb->minor_version >= ISAMB_MINOR_VERSION_WITH_ROOT) + encode_ptr(&dst, isamb->root_ptr); + + memset(dst, '\0', b_size); /* ensure no random bytes are written */ + + len = dst - hbuf; + + /* print exactly 16 bytes (including trailing 0) */ + sprintf(hbuf, "isamb%02d %02d %02d\r\n", major, + isamb->minor_version, len); + + 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); + } + } + if (isamb->file[i].bf) + 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. + Decode leading sys bytes .. consisting of + Offset:Meaning + 0: leader byte, != 0 leaf, == 0, non-leaf + 1-2: used size of block + 3-7*: number of items and all children -struct ISAMB_block *open_block (ISAMB b, ISAMC_P 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, ISAM_P pos) { - int cat = pos&3; + int cat = (int) (pos&CAT_MASK); + const char *src; + int offset = b->file[cat].head.block_offset; struct ISAMB_block *p; if (!pos) return 0; - p = xmalloc (sizeof(*p)); + p = xmalloc(sizeof(*p)); p->pos = pos; - p->cat = pos & 3; - p->buf = xmalloc (b->file[cat].head.block_size); + p->cat = (int) (pos & CAT_MASK); + 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/4, 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) != 1) { - yaz_log (LOG_FATAL, "read failure for pos=%ld block=%ld", - (long) pos, (long) pos/4); - abort(); + yaz_log(YLOG_FATAL, "isamb: read fail for pos=%ld block=%ld", + (long) pos, (long) pos/CAT_MAX); + zebra_exit("isamb:open_block"); } } - p->bytes = p->buf + ISAMB_DATA_OFFSET; + p->bytes = (char *)p->buf + offset; p->leaf = p->buf[0]; - p->size = p->buf[1] + 256 * p->buf[2] - ISAMB_DATA_OFFSET; + 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", + p->size, pos); + } + assert(p->size >= 0); + src = (char*) p->buf + 3; + decode_ptr(&src, &p->no_items); + p->offset = 0; p->dirty = 0; p->deleted = 0; - p->decodeClientData = (*b->method->code_start)(ISAMC_DECODE); + p->decodeClientData = (*b->method->codec.start)(); return p; } -struct ISAMB_block *new_block (ISAMB b, int leaf, int cat) +struct ISAMB_block *new_block(ISAMB b, int leaf, int cat) { 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) { - int block_no; + zint block_no; block_no = b->file[cat].head.last_block++; - p->pos = block_no * 4 + cat; + 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 { p->pos = b->file[cat].head.free_list; - if (!get_block (b, p->pos, p->buf, 0)) + assert((p->pos & CAT_MASK) == cat); + 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/4, 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 (LOG_FATAL, "read failure for pos=%ld block=%ld", - (long) p->pos/4, (long) p->pos/4); - abort (); + yaz_log(YLOG_FATAL, "isamb: read fail for pos=%ld block=%ld", + (long) p->pos/CAT_MAX, (long) p->pos/CAT_MAX); + zebra_exit("isamb:new_block"); } } - yaz_log (b->log_freelist, "got block %d from freelist %d:%d", p->pos, - cat, p->pos/4); - memcpy (&b->file[cat].head.free_list, p->buf, sizeof(int)); + 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; b->file[cat].head_dirty = 1; - memset (p->buf, 0, b->file[cat].head.block_size); - p->bytes = p->buf + ISAMB_DATA_OFFSET; + memset(p->buf, 0, b->file[cat].head.block_size); + p->bytes = (char*)p->buf + b->file[cat].head.block_offset; p->leaf = leaf; p->size = 0; p->dirty = 1; p->deleted = 0; p->offset = 0; - p->decodeClientData = (*b->method->code_start)(ISAMC_DECODE); + p->no_items = 0; + p->decodeClientData = (*b->method->codec.start)(); return p; } -struct ISAMB_block *new_leaf (ISAMB b, int cat) +struct ISAMB_block *new_leaf(ISAMB b, int cat) { - return new_block (b, 1, cat); + return new_block(b, 1, cat); } -struct ISAMB_block *new_int (ISAMB b, int cat) +struct ISAMB_block *new_int(ISAMB b, int cat) +{ + return new_block(b, 0, cat); +} + +static void check_block(ISAMB b, struct ISAMB_block *p) { - return new_block (b, 0, cat); + assert(b); /* mostly to make the compiler shut up about unused b */ + if (p->leaf) + { + ; + } + else + { + /* sanity check */ + char *startp = p->bytes; + const char *src = startp; + 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) + { +#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); + assert(item_len > 0 && item_len < 128); + src += item_len; +#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 %d from freelist %d:%d", - p->pos, p->cat, p->pos/4); - memcpy (p->buf, &b->file[p->cat].head.free_list, sizeof(int)); + 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(zint)); b->file[p->cat].head.free_list = p->pos; - if (!get_block (b, p->pos, p->buf, 1)) + 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"); - bf_write (b->file[p->cat].bf, p->pos/4, 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) { - int size = p->size + ISAMB_DATA_OFFSET; + int offset = b->file[p->cat].head.block_offset; + 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; p->buf[1] = size & 255; p->buf[2] = size >> 8; - if (!get_block (b, p->pos, p->buf, 1)) + encode_ptr(&dst, p->no_items); + check_block(b, p); + 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/4, 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->code_stop)(ISAMC_DECODE, p->decodeClientData); - xfree (p->buf); - xfree (p); + (*b->method->codec.stop)(p->decodeClientData); + xfree(p->buf); + xfree(p); } -int insert_sub (ISAMB b, struct ISAMB_block **p, - void *new_item, int *mode, - ISAMC_I stream, - struct ISAMB_block **sp, - void *sub_item, int *sub_size, - void *max_item); - -int insert_int (ISAMB b, struct ISAMB_block *p, void *lookahead_item, - int *mode, - ISAMC_I stream, struct ISAMB_block **sp, - void *split_item, int *split_size, void *last_max_item) +int insert_sub(ISAMB b, struct ISAMB_block **p, + void *new_item, int *mode, + ISAMC_I *stream, + struct ISAMB_block **sp, + void *sub_item, int *sub_size, + const void *max_item); + +int insert_int(ISAMB b, struct ISAMB_block *p, void *lookahead_item, + int *mode, + ISAMC_I *stream, struct ISAMB_block **sp, + void *split_item, int *split_size, const void *last_max_item) { char *startp = p->bytes; - char *src = startp; + const char *src = startp; char *endp = p->bytes + p->size; - int pos; + ISAM_P pos; struct ISAMB_block *sub_p1 = 0, *sub_p2 = 0; char sub_item[DST_ITEM_MAX]; int sub_size; - int more; + int more = 0; + zint diff_terms = 0; + void *c1 = (*b->method->codec.start)(); *sp = 0; - decode_ptr (&src, &pos); + assert(p->size >= 0); + decode_ptr(&src, &pos); while (src != endp) { - int item_len; int d; - decode_ptr (&src, &item_len); + const char *src0 = src; +#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); - assert (sub_p1); - more = insert_sub (b, &sub_p1, lookahead_item, mode, - stream, &sub_p2, - sub_item, &sub_size, src); + 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, src); + diff_terms += sub_p1->no_items; + src = src0; break; } src += item_len; - decode_ptr (&src, &pos); +#endif + decode_ptr(&src, &pos); } if (!sub_p1) { - sub_p1 = open_block (b, pos); - assert (sub_p1); - more = insert_sub (b, &sub_p1, lookahead_item, mode, stream, &sub_p2, - sub_item, &sub_size, last_max_item); + /* 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, + sub_item, &sub_size, last_max_item); + diff_terms += sub_p1->no_items; + } + if (sub_p2) + diff_terms += sub_p2->no_items; + if (diff_terms) + { + p->dirty = 1; + p->no_items += diff_terms; } if (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 < DST_ITEM_MAX && sub_size > 1); - assert (sub_size < 30 && sub_size > 1); + memcpy(dst, startp, src - startp); - memcpy (dst, startp, src - startp); - dst += src - startp; - encode_ptr (&dst, sub_size); /* sub length and item */ - memcpy (dst, sub_item, sub_size); +#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 */ { - memcpy (dst, src, endp - src); + memcpy(dst, src, endp - src); dst += endp - src; } p->size = dst - dst_buf; + assert(p->size >= 0); + if (p->size <= b->file[p->cat].head.block_max) { - memcpy (startp, dst_buf, dst - dst_buf); + /* it fits OK in this block */ + memcpy(startp, dst_buf, dst - dst_buf); + + close_block(b, sub_p2); } 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; - char *half; + const char *half; src = dst_buf; endp = dst; + b->number_of_int_splits++; + + p->dirty = 1; + close_block(b, sub_p2); + half = src + b->file[p->cat].head.block_size/2; - decode_ptr (&src, &pos); + decode_ptr(&src, &pos); + + if (b->enable_int_count) + { + /* read sub block so we can get no_items for it */ + sub_p3 = open_block(b, pos); + no_items_first_half += sub_p3->no_items; + close_block(b, sub_p3); + } + while (src <= half) { - decode_ptr (&src, split_size); +#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); + + if (b->enable_int_count) + { + /* read sub block so we can get no_items for it */ + sub_p3 = open_block(b, pos); + no_items_first_half += sub_p3->no_items; + close_block(b, sub_p3); + } } + /* p is first half */ p_new_size = src - dst_buf; - memcpy (p->bytes, dst_buf, p_new_size); - - decode_ptr (&src, split_size); - memcpy (split_item, src, *split_size); + memcpy(p->bytes, dst_buf, p_new_size); + +#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; - - *sp = new_int (b, p->cat); +#endif + /* *sp is second half */ + *sp = new_int(b, p->cat); (*sp)->size = endp - src; - memcpy ((*sp)->bytes, src, (*sp)->size); + memcpy((*sp)->bytes, src, (*sp)->size); p->size = p_new_size; + + /* adjust no_items in first&second half */ + (*sp)->no_items = p->no_items - no_items_first_half; + p->no_items = no_items_first_half; } - p->dirty = 1; - close_block (b, sub_p2); + p->dirty = 1; } - close_block (b, sub_p1); + close_block(b, sub_p1); + (*b->method->codec.stop)(c1); return more; } - -int insert_leaf (ISAMB b, struct ISAMB_block **sp1, void *lookahead_item, - int *lookahead_mode, ISAMC_I stream, struct ISAMB_block **sp2, - void *sub_item, int *sub_size, - void *max_item) +int insert_leaf(ISAMB b, struct ISAMB_block **sp1, void *lookahead_item, + int *lookahead_mode, ISAMC_I *stream, + struct ISAMB_block **sp2, + void *sub_item, int *sub_size, + const void *max_item) { struct ISAMB_block *p = *sp1; - char *src = 0, *endp = 0; + char *endp = 0; + const char *src = 0; char dst_buf[DST_BUF_SIZE], *dst = dst_buf; int new_size; - void *c1 = (*b->method->code_start)(ISAMC_DECODE); - void *c2 = (*b->method->code_start)(ISAMC_ENCODE); + void *c1 = (*b->method->codec.start)(); + void *c2 = (*b->method->codec.start)(); int more = 1; int quater = b->file[b->no_cat-1].head.block_max / 4; - char *cut = dst_buf + quater * 2; + char *mid_cut = dst_buf + quater * 2; + char *tail_cut = dst_buf + quater * 3; char *maxp = dst_buf + b->file[b->no_cat-1].head.block_max; char *half1 = 0; char *half2 = 0; char cut_item_buf[DST_ITEM_MAX]; 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) { char file_item_buf[DST_ITEM_MAX]; char *file_item = file_item_buf; - + src = p->bytes; endp = p->bytes + p->size; - (*b->method->code_item)(ISAMC_DECODE, c1, &file_item, &src); + (*b->method->codec.decode)(c1, &file_item, &src); while (1) { - char *dst_item = 0; - char *dst_0 = dst; + const char *dst_item = 0; /* resulting item to be inserted */ 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 + d = 0: equal + d > 0: lookahead before file + d < 0: lookahead after file + */ if (d > 0) { + /* lookahead must be inserted */ + dst_item = lookahead_item; + /* if this is not an insertion, it's really bad .. */ + if (!*lookahead_mode) + { + yaz_log(YLOG_WARN, "isamb: Inconsistent register (1)"); + assert(*lookahead_mode); + } + } + else if (d == 0 && *lookahead_mode == 2) + { + /* For mode == 2, we insert the new key anyway - even + though the comparison is 0. */ dst_item = lookahead_item; - assert (*lookahead_mode); + p->dirty = 1; } else dst_item = file_item_buf; - if (!*lookahead_mode && d == 0) + + if (d == 0 && !*lookahead_mode) { + /* it's a deletion and they match so there is nothing + to be inserted anyway .. But mark the thing dirty + (file item was part of input.. The item will not be + part of output */ p->dirty = 1; } - else if (!half1 && dst > cut) + else if (!half1 && dst > mid_cut) { - char *dst_item_0 = dst_item; + /* we have reached the splitting point for the first time */ + const char *dst_item_0 = dst_item; half1 = dst; /* candidate for splitting */ - - (*b->method->code_item)(ISAMC_ENCODE, c2, &dst, &dst_item); - + + /* encode the resulting item */ + (*b->method->codec.encode)(c2, &dst, &dst_item); + cut_item_size = dst_item - dst_item_0; - memcpy (cut_item_buf, dst_item_0, cut_item_size); - + assert(cut_item_size > 0); + memcpy(cut_item_buf, dst_item_0, cut_item_size); + half2 = dst; + no_items_1 = no_items; + no_items++; } else - (*b->method->code_item)(ISAMC_ENCODE, c2, &dst, &dst_item); - if (d > 0) + { + /* encode the resulting item */ + (*b->method->codec.encode)(c2, &dst, &dst_item); + no_items++; + } + + /* now move "pointers" .. result has been encoded .. */ + if (d > 0) { - if (dst > maxp) - { - dst = dst_0; + /* we must move the lookahead pointer */ + + inserted_dst_bytes += (dst - dst_0); + if (inserted_dst_bytes >= quater) + /* no more room. Mark lookahead as "gone".. */ lookahead_item = 0; - } else { + /* move it really.. */ lookahead_next = lookahead_item; if (!(*stream->read_item)(stream->clientData, &lookahead_next, lookahead_mode)) { + /* end of stream reached: no "more" and no lookahead */ lookahead_item = 0; more = 0; } if (lookahead_item && max_item && (*b->method->compare_item)(max_item, lookahead_item) <= 0) { - /* max_item 1 */ + /* the lookahead goes beyond what we allow in this + leaf. Mark it as "gone" */ lookahead_item = 0; } - + p->dirty = 1; } } else if (d == 0) { + /* exact match .. move both pointers */ + lookahead_next = lookahead_item; if (!(*stream->read_item)(stream->clientData, &lookahead_next, lookahead_mode)) @@ -587,56 +1065,68 @@ int insert_leaf (ISAMB b, struct ISAMB_block **sp1, void *lookahead_item, more = 0; } if (src == endp) - break; - file_item = file_item_buf; - (*b->method->code_item)(ISAMC_DECODE, c1, &file_item, &src); + break; /* end of file stream reached .. */ + file_item = file_item_buf; /* move file pointer */ + (*b->method->codec.decode)(c1, &file_item, &src); } else { + /* file pointer must be moved */ if (src == endp) break; file_item = file_item_buf; - (*b->method->code_item)(ISAMC_DECODE, c1, &file_item, &src); + (*b->method->codec.decode)(c1, &file_item, &src); } } } + + /* 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 = lookahead_item; + 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) { - /* max_item 2 */ + /* stop if we have reached the value of max item */ break; } if (!*lookahead_mode) { - yaz_log (LOG_WARN, "Inconsistent register (2)"); - abort(); + /* this is append. So a delete is bad */ + yaz_log(YLOG_WARN, "isamb: Inconsistent register (2)"); + assert(*lookahead_mode); } - else if (!half1 && dst > cut) + else if (!half1 && dst > tail_cut) { - char *dst_item_0 = dst_item; + const char *src_0 = src; half1 = dst; /* candidate for splitting */ - - (*b->method->code_item)(ISAMC_ENCODE, c2, &dst, &dst_item); - - cut_item_size = dst_item - dst_item_0; - memcpy (cut_item_buf, dst_item_0, cut_item_size); - + + (*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; } else - (*b->method->code_item)(ISAMC_ENCODE, c2, &dst, &dst_item); + (*b->method->codec.encode)(c2, &dst, &src); if (dst > maxp) { dst = dst_0; break; } + no_items++; if (p) p->dirty = 1; dst_item = lookahead_item; @@ -648,12 +1138,12 @@ int insert_leaf (ISAMB b, struct ISAMB_block **sp1, void *lookahead_item, } } 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 */ p->deleted = 1; - close_block (b, p); + close_block(b, p); /* delete it too!! */ p = 0; /* make a new one anyway */ } @@ -665,69 +1155,120 @@ int insert_leaf (ISAMB b, struct ISAMB_block **sp1, void *lookahead_item, break; if (i == b->no_cat) i = b->no_cat - 1; - p = new_leaf (b, i); + p = new_leaf(b, i); } if (new_size > b->file[p->cat].head.block_max) { char *first_dst; - char *cut_item = cut_item_buf; + const char *cut_item = cut_item_buf; - assert (half1); - assert (half2); + assert(half1); + assert(half2); - /* first half */ + assert(cut_item_size > 0); + + /* first half */ p->size = half1 - dst_buf; - memcpy (p->bytes, dst_buf, 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; /* second half */ - *sp2 = new_leaf (b, p->cat); + *sp2 = new_leaf(b, p->cat); + + (*b->method->codec.reset)(c2); - (*b->method->code_reset)(c2); + b->number_of_leaf_splits++; first_dst = (*sp2)->bytes; - (*b->method->code_item)(ISAMC_ENCODE, c2, &first_dst, &cut_item); + (*b->method->codec.encode)(c2, &first_dst, &cut_item); - memcpy (first_dst, half2, dst - half2); + 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; - memcpy (sub_item, cut_item_buf, cut_item_size); + memcpy(sub_item, cut_item_buf, cut_item_size); *sub_size = cut_item_size; } else { - memcpy (p->bytes, dst_buf, dst - dst_buf); + memcpy(p->bytes, dst_buf, dst - dst_buf); p->size = new_size; + p->no_items = no_items; } - (*b->method->code_stop)(ISAMC_DECODE, c1); - (*b->method->code_stop)(ISAMC_ENCODE, c2); + (*b->method->codec.stop)(c1); + (*b->method->codec.stop)(c2); *sp1 = p; return more; } -int insert_sub (ISAMB b, struct ISAMB_block **p, void *new_item, - int *mode, - ISAMC_I stream, - struct ISAMB_block **sp, - void *sub_item, int *sub_size, - void *max_item) +int insert_sub(ISAMB b, struct ISAMB_block **p, void *new_item, + int *mode, + ISAMC_I *stream, + struct ISAMB_block **sp, + void *sub_item, int *sub_size, + const void *max_item) { if (!*p || (*p)->leaf) - 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, + 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, + sub_size, max_item); } -int isamb_merge (ISAMB b, ISAMC_P pos, ISAMC_I stream) +int isamb_unlink(ISAMB b, ISAM_P pos) +{ + struct ISAMB_block *p1; + + if (!pos) + return 0; + p1 = open_block(b, pos); + p1->deleted = 1; + if (!p1->leaf) + { + zint sub_p; + 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) + { +#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; +} + +void isamb_merge(ISAMB b, ISAM_P *pos, ISAMC_I *stream) { char item_buf[DST_ITEM_MAX]; char *item_ptr; int i_mode; int more; + int must_delete = 0; if (b->cache < 0) { @@ -738,7 +1279,8 @@ int isamb_merge (ISAMB b, ISAMC_P pos, ISAMC_I stream) 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); @@ -747,158 +1289,398 @@ int isamb_merge (ISAMB b, ISAMC_P pos, ISAMC_I stream) 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, - sub_item, &sub_size, 0); + + 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); + struct ISAMB_block *p2 = new_int(b, p->cat); char *dst = p2->bytes + p2->size; - - encode_ptr (&dst, p->pos); - assert (sub_size < 20); - encode_ptr (&dst, sub_size); - memcpy (dst, sub_item, 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 < DST_ITEM_MAX && 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; - pos = p2->pos; /* return new super page */ - close_block (b, sp); - close_block (b, p2); + p2->no_items = p->no_items + sp->no_items; + *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) */ - close_block (b, p); + { + *pos = p->pos; /* return current one (again) */ + } + if (p->no_items == 0) + must_delete = 1; + else + must_delete = 0; + close_block(b, p); + } + if (must_delete) + { + isamb_unlink(b, *pos); + *pos = 0; } - return pos; } -ISAMB_PP isamb_pp_open_x (ISAMB isamb, ISAMB_P pos, int *level) +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 (10 * sizeof(*pp->block)); + pp->block = xmalloc(ISAMB_MAX_LEVEL * sizeof(*pp->block)); pp->pos = pos; pp->level = 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; iskipped_nodes[i] = pp->accessed_nodes[i] = 0; while (1) { - struct ISAMB_block *p = open_block (isamb, pos); - char *src = p->bytes + p->offset; + struct ISAMB_block *p = open_block(isamb, pos); + const char *src = p->bytes + p->offset; pp->block[pp->level] = p; pp->total_size += p->size; 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; if (level) *level = pp->level; return pp; } -ISAMB_PP isamb_pp_open (ISAMB isamb, ISAMB_P pos) +ISAMB_PP isamb_pp_open(ISAMB isamb, ISAM_P pos, int scope) { - return isamb_pp_open_x (isamb, pos, 0); + 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, " + "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: " + 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--) + { + pp->isamb->accessed_nodes[i] += pp->accessed_nodes[i]; + pp->isamb->skipped_nodes[i] += pp->skipped_nodes[i]; + } if (size) *size = pp->total_size; 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) +int isamb_block_info(ISAMB isamb, int cat) { if (cat >= 0 && cat < isamb->no_cat) return isamb->file[cat].head.block_size; return -1; } -void isamb_pp_close (ISAMB_PP pp) +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, 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); + 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, + p->no_items); + (*pr)(prefix_str); + sprintf(prefix_str, "%*s " ZINT_FORMAT, level*2, "", pos); + if (p->leaf) + { + while (p->offset < p->size) + { + const char *src = p->bytes + p->offset; + char *dst = buf; + (*b->method->codec.decode)(p->decodeClientData, &dst, &src); + (*b->method->log_item)(YLOG_DEBUG, buf, prefix_str); + p->offset = src - (char*) p->bytes; + } + assert(p->offset == p->size); + } + else + { + const char *src = p->bytes + p->offset; + ISAM_P sub; + + decode_ptr(&src, &sub); + p->offset = src - (char*) p->bytes; + + isamb_dump_r(b, sub, pr, level+1); + + 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); + (*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; +#endif + decode_ptr(&src, &sub); + + p->offset = src - (char*) p->bytes; + + isamb_dump_r(b, sub, pr, level+1); + } + } + close_block(b, p); + } +} + +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) +{ + return isamb_pp_forward(pp, buf, 0); +} + + +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); + *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_read (ISAMB_PP pp, void *buf) +int isamb_pp_forward(ISAMB_PP pp, void *buf, const void *untilb) { char *dst = buf; - char *src; + 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) { - int pos, item_len; + 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]); + close_block(pp->isamb, pp->block[pp->level]); pp->block[pp->level] = 0; (pp->level)--; p = pp->block[pp->level]; - assert (!p->leaf); /* must be int */ + assert(!p->leaf); } + + assert(!p->leaf); src = p->bytes + p->offset; - - decode_ptr (&src, &item_len); + +#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; - decode_ptr (&src, &pos); - +#endif + decode_ptr(&src, &pos); p->offset = src - (char*) p->bytes; - ++(pp->level); - + 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) < pp->scope) + { + src = src_0; + break; + } +#else + decode_item_len(&src, &item_len); + if ((*b->method->compare_item)(untilb, src) < pp->scope) + 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->block[pp->level] = p = open_block(pp->isamb, pos); pp->total_size += p->size; pp->no_blocks++; - - if (p->leaf) /* leaf */ + + if (p->leaf) { break; } + src = p->bytes + p->offset; - decode_ptr (&src, &pos); - p->offset = src - (char*) p->bytes; + 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) < pp->scope) + { + src = src_0; + break; + } +#else + decode_ptr(&src, &item_len); + if ((*b->method->compare_item)(untilb, src) <= pp->scope) + 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) < pp->scope) + break; + dst = dst0; + if (p->offset == p->size) goto again; } - assert (p->offset < p->size); - assert (p->leaf); - src = p->bytes + p->offset; - (*pp->isamb->method->code_item)(ISAMC_DECODE, p->decodeClientData, - &dst, &src); - p->offset = src - (char*) p->bytes; + pp->returned_numbers++; return 1; } -int isamb_pp_num (ISAMB_PP pp) +zint isamb_get_int_splits(ISAMB b) { - return 1; + return b->number_of_int_splits; +} + +zint isamb_get_leaf_splits(ISAMB b) +{ + return b->number_of_leaf_splits; +} + +zint isamb_get_root_ptr(ISAMB b) +{ + return b->root_ptr; } + +void isamb_set_root_ptr(ISAMB b, zint root_ptr) +{ + b->root_ptr = root_ptr; +} + + +/* + * Local variables: + * c-basic-offset: 4 + * c-file-style: "Stroustrup" + * indent-tabs-mode: nil + * End: + * vim: shiftwidth=4 tabstop=8 expandtab + */ +