/*
- * Copyright (C) 1994-1995, Index Data I/S
+ * Copyright (C) 1994-1999, Index Data
* All rights reserved.
* Sebastian Hammer, Adam Dickmeiss
*
* $Log: recindex.c,v $
- * Revision 1.5 1995-11-22 17:19:18 adam
+ * Revision 1.24 1999-06-25 13:48:02 adam
+ * Updated MSVC project files.
+ * Added BZIP2 record compression (not very well tested).
+ *
+ * Revision 1.23 1999/05/26 07:49:13 adam
+ * C++ compilation.
+ *
+ * Revision 1.22 1999/02/18 12:49:34 adam
+ * Changed file naming scheme for register files as well as record
+ * store/index files.
+ *
+ * Revision 1.21 1999/02/02 14:51:03 adam
+ * Updated WIN32 code specific sections. Changed header.
+ *
+ * Revision 1.20 1998/01/12 15:04:08 adam
+ * The test option (-s) only uses read-lock (and not write lock).
+ *
+ * Revision 1.19 1997/09/17 12:19:16 adam
+ * Zebra version corresponds to YAZ version 1.4.
+ * Changed Zebra server so that it doesn't depend on global common_resource.
+ *
+ * Revision 1.18 1997/07/15 16:28:42 adam
+ * Bug fix: storeData didn't work with files with multiple records.
+ * Bug fix: fixed memory management with records; not really well
+ * thought through.
+ *
+ * Revision 1.17 1997/02/12 20:39:46 adam
+ * Implemented options -f <n> that limits the log to the first <n>
+ * records.
+ * Changed some log messages also.
+ *
+ * Revision 1.16 1996/06/04 10:19:00 adam
+ * Minor changes - removed include of ctype.h.
+ *
+ * Revision 1.15 1996/05/13 14:23:06 adam
+ * Work on compaction of set/use bytes in dictionary.
+ *
+ * Revision 1.14 1996/02/01 20:48:15 adam
+ * The total size of records are always checked in rec_cache_insert to
+ * reduce memory usage.
+ *
+ * Revision 1.13 1995/12/11 09:12:49 adam
+ * The rec_get function returns NULL if record doesn't exist - will
+ * happen in the server if the result set records have been deleted since
+ * the creation of the set (i.e. the search).
+ * The server saves a result temporarily if it is 'volatile', i.e. the
+ * set is register dependent.
+ *
+ * Revision 1.12 1995/12/07 17:38:47 adam
+ * Work locking mechanisms for concurrent updates/commit.
+ *
+ * Revision 1.11 1995/12/06 13:58:26 adam
+ * Improved flushing of records - all flushes except the last one
+ * don't write the last accessed. Also flush takes place if record
+ * info occupy more than about 256k.
+ *
+ * Revision 1.10 1995/12/06 12:41:24 adam
+ * New command 'stat' for the index program.
+ * Filenames can be read from stdin by specifying '-'.
+ * Bug fix/enhancement of the transformation from terms to regular
+ * expressons in the search engine.
+ *
+ * Revision 1.9 1995/11/30 08:34:33 adam
+ * Started work on commit facility.
+ * Changed a few malloc/free to xmalloc/xfree.
+ *
+ * Revision 1.8 1995/11/28 14:26:21 adam
+ * Bug fix: recordId with constant wasn't right.
+ * Bug fix: recordId dictionary entry wasn't deleted when needed.
+ *
+ * Revision 1.7 1995/11/28 09:09:43 adam
+ * Zebra config renamed.
+ * Use setting 'recordId' to identify record now.
+ * Bug fix in recindex.c: rec_release_blocks was invokeded even
+ * though the blocks were already released.
+ * File traversal properly deletes records when needed.
+ *
+ * Revision 1.6 1995/11/25 10:24:06 adam
+ * More record fields - they are enumerated now.
+ * New options: flagStoreData flagStoreKey.
+ *
+ * Revision 1.5 1995/11/22 17:19:18 adam
* Record management uses the bfile system.
*
* Revision 1.4 1995/11/20 16:59:46 adam
* Started work on better record management system.
*
*/
+
+
+/*
+ * Format of first block
+ * next (4 bytes)
+ * ref_count (4 bytes)
+ * block (504 bytes)
+ *
+ * Format of subsequent blocks
+ * next (4 bytes)
+ * block (508 bytes)
+ *
+ * Format of each record
+ * sysno
+ * (length, data) - pairs
+ * length = 0 if same as previous
+ */
#include <stdio.h>
#include <assert.h>
#include <string.h>
-#include <ctype.h>
-#include <assert.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-#include "recindex.h"
-
-#define USE_BF 1
-
-#if USE_BF
-#include <bfile.h>
-
-#define REC_BLOCK_TYPES 2
-#define REC_HEAD_MAGIC "recindx"
-
-struct records_info {
- int rw;
-
- char *index_fname;
- BFile index_BFile;
-
-
- char *data_fname[REC_BLOCK_TYPES];
- BFile data_BFile[REC_BLOCK_TYPES];
-
- char *tmp_buf;
- int tmp_size;
-
- struct record_cache_entry *record_cache;
- int cache_size;
- int cache_cur;
- int cache_max;
-
- struct records_head {
- char magic[8];
- int block_size[REC_BLOCK_TYPES];
- int block_free[REC_BLOCK_TYPES];
- int block_last[REC_BLOCK_TYPES];
- int block_used[REC_BLOCK_TYPES];
- int block_move[REC_BLOCK_TYPES];
-
- int index_last;
- int index_free;
- int no_records;
-
- } head;
-};
-
-enum recordCacheFlag { recordFlagNop, recordFlagWrite, recordFlagDelete };
-
-struct record_cache_entry {
- Record rec;
- enum recordCacheFlag flag;
-};
-
-struct record_index_entry {
- union {
- struct {
- int next;
- int size;
- } used;
- struct {
- int next;
- } free;
- } u;
-};
+#include "recindxp.h"
+#if HAVE_BZLIB_H
+#include <bzlib.h>
+#endif
static void rec_write_head (Records p)
{
int r;
}
}
-static void rec_tmp_expand (Records p, int size, int dst_type)
+static void rec_tmp_expand (Records p, int size)
{
- if (p->tmp_size < size + 256 ||
- p->tmp_size < p->head.block_size[dst_type]*2)
+ if (p->tmp_size < size + 2048 ||
+ p->tmp_size < p->head.block_size[REC_BLOCK_TYPES-1]*2)
{
- free (p->tmp_buf);
- p->tmp_size = size + p->head.block_size[dst_type]*2 +
- 256;
- if (!(p->tmp_buf = malloc (p->tmp_size)))
- {
- logf (LOG_FATAL|LOG_ERRNO, "malloc");
- exit (1);
- }
+ xfree (p->tmp_buf);
+ p->tmp_size = size + p->head.block_size[REC_BLOCK_TYPES-1]*2 + 2048;
+ p->tmp_buf = (char *) xmalloc (p->tmp_size);
}
}
{
logf (LOG_FATAL|LOG_ERRNO, "read in %s at pos %ld",
p->index_fname, (long) pos);
- abort ();
exit (1);
}
return r;
static void rec_release_blocks (Records p, int sysno)
{
struct record_index_entry entry;
- int freeblock, freenext;
+ int freeblock;
+ int block_and_ref[2];
int dst_type;
+ int first = 1;
+ logf (LOG_LOG, "release_blocks for sysno=%d", sysno);
if (read_indx (p, sysno, &entry, sizeof(entry), 1) != 1)
return ;
- freeblock = entry.u.used.next;
+
+ freeblock = entry.next;
assert (freeblock > 0);
dst_type = freeblock & 7;
+ assert (dst_type < REC_BLOCK_TYPES);
freeblock = freeblock / 8;
while (freeblock)
{
- if (bf_read (p->data_BFile[dst_type], freeblock, 0, sizeof(freenext),
- &freenext) != 1)
+ if (bf_read (p->data_BFile[dst_type], freeblock, 0,
+ sizeof(block_and_ref), block_and_ref) != 1)
{
logf (LOG_FATAL|LOG_ERRNO, "read in rec_del_single");
exit (1);
}
- if (bf_write (p->data_BFile[dst_type], freeblock, 0, sizeof(freenext),
+ if (first)
+ {
+ block_and_ref[1]--;
+ if (block_and_ref[1])
+ {
+ if (bf_write (p->data_BFile[dst_type], freeblock, 0,
+ sizeof(block_and_ref), block_and_ref))
+ {
+ logf (LOG_FATAL|LOG_ERRNO, "write in rec_del_single");
+ exit (1);
+ }
+ return;
+ }
+ first = 0;
+ }
+
+ if (bf_write (p->data_BFile[dst_type], freeblock, 0, sizeof(freeblock),
&p->head.block_free[dst_type]))
{
logf (LOG_FATAL|LOG_ERRNO, "write in rec_del_single");
exit (1);
}
p->head.block_free[dst_type] = freeblock;
- freeblock = freenext;
+ freeblock = block_and_ref[0];
+
p->head.block_used[dst_type]--;
}
+ p->head.total_bytes -= entry.size;
}
static void rec_delete_single (Records p, Record rec)
rec_release_blocks (p, rec->sysno);
- entry.u.free.next = p->head.index_free;
+ entry.next = p->head.index_free;
+ entry.size = 0;
p->head.index_free = rec->sysno;
write_indx (p, rec->sysno, &entry, sizeof(entry));
}
+static void rec_write_tmp_buf (Records p, int size, int *sysnos);
+
static void rec_write_single (Records p, Record rec)
{
+
+ int sysnos[2];
int i, size = 0;
char *cptr;
- int dst_type = 0;
- int no_written = 0;
- int block_prev = -1, block_free;
- struct record_index_entry entry;
-
- rec_release_blocks (p, rec->sysno);
+ logf (LOG_LOG, " rec_write_single !!!!!!!!!!!!!!!!!!!!!!!!!!!!");
for (i = 0; i < REC_NO_INFO; i++)
if (!rec->info[i])
size += sizeof(*rec->size);
else
size += sizeof(*rec->size) + rec->size[i];
- for (i = 1; i<REC_BLOCK_TYPES; i++)
- if (size >= p->head.block_move[i])
- dst_type = i;
-
- rec_tmp_expand (p, size, dst_type);
+ rec_tmp_expand (p, size);
cptr = p->tmp_buf + sizeof(int); /* a hack! */
for (i = 0; i < REC_NO_INFO; i++)
cptr += rec->size[i];
}
}
- cptr = p->tmp_buf;
+ sysnos[0] = rec->sysno;
+ sysnos[1] = -1;
+ rec_write_tmp_buf (p, size, sysnos);
+}
+
+static void rec_write_tmp_buf (Records p, int size, int *sysnos)
+{
+ struct record_index_entry entry;
+ int no_written = 0;
+ char *cptr = p->tmp_buf;
+ int block_prev = -1, block_free;
+ int dst_type = 0;
+ int i;
+
+ for (i = 1; i<REC_BLOCK_TYPES; i++)
+ if (size >= p->head.block_move[i])
+ dst_type = i;
while (no_written < size)
{
block_free = p->head.block_free[dst_type];
{
logf (LOG_FATAL|LOG_ERRNO, "read in %s at free block %d",
p->data_fname[dst_type], block_free);
+ exit (1);
}
}
else
block_free = p->head.block_last[dst_type]++;
if (block_prev == -1)
{
- entry.u.used.next = block_free*8 + dst_type;
- entry.u.used.size = size;
-
- write_indx (p, rec->sysno, &entry, sizeof(entry));
+ entry.next = block_free*8 + dst_type;
+ entry.size = size;
+ p->head.total_bytes += size;
+ while (*sysnos > 0)
+ {
+ write_indx (p, *sysnos, &entry, sizeof(entry));
+ sysnos++;
+ }
}
else
{
sizeof(int) + (p->tmp_buf+size) - cptr, cptr);
}
+static void rec_update_single (Records p, Record rec)
+{
+ rec_release_blocks (p, rec->sysno);
+ rec_write_single (p, rec);
+}
-Records rec_open (int rw)
+Records rec_open (BFiles bfs, int rw)
{
Records p;
int i, r;
- if (!(p = malloc (sizeof(*p))))
- {
- logf (LOG_FATAL|LOG_ERRNO, "malloc");
- exit (1);
- }
+ p = (Records) xmalloc (sizeof(*p));
p->rw = rw;
p->tmp_size = 1024;
- p->tmp_buf = malloc (p->tmp_size);
- if (!p->tmp_buf)
- {
- logf (LOG_FATAL|LOG_ERRNO, "malloc");
- exit (1);
- }
- p->index_fname = "recindex";
- p->index_BFile = bf_open (p->index_fname, 128, rw);
+ p->tmp_buf = (char *) xmalloc (p->tmp_size);
+ p->index_fname = "reci";
+ p->index_BFile = bf_open (bfs, p->index_fname, 128, rw);
if (p->index_BFile == NULL)
{
logf (LOG_FATAL|LOG_ERRNO, "open %s", p->index_fname);
p->head.index_free = 0;
p->head.index_last = 1;
p->head.no_records = 0;
+ p->head.total_bytes = 0;
for (i = 0; i<REC_BLOCK_TYPES; i++)
{
p->head.block_free[i] = 0;
for (i = 0; i<REC_BLOCK_TYPES; i++)
{
char str[80];
- sprintf (str, "recdata%d", i);
- p->data_fname[i] = malloc (strlen(str)+1);
+ sprintf (str, "recd%c", i + 'A');
+ p->data_fname[i] = (char *) xmalloc (strlen(str)+1);
strcpy (p->data_fname[i], str);
p->data_BFile[i] = NULL;
}
for (i = 0; i<REC_BLOCK_TYPES; i++)
{
- if (!(p->data_BFile[i] = bf_open (p->data_fname[i],
+ if (!(p->data_BFile[i] = bf_open (bfs, p->data_fname[i],
p->head.block_size[i],
rw)))
{
exit (1);
}
}
- p->cache_max = 10;
+ p->cache_max = 400;
p->cache_cur = 0;
- if (!(p->record_cache = malloc (sizeof(*p->record_cache)*p->cache_max)))
+ p->record_cache = (struct record_cache_entry *)
+ xmalloc (sizeof(*p->record_cache)*p->cache_max);
+ return p;
+}
+
+static void rec_encode_unsigned (unsigned n, unsigned char *buf, int *len)
+{
+ (*len) = 0;
+ while (n > 127)
{
- logf (LOG_FATAL|LOG_ERRNO, "malloc");
- exit (1);
+ buf[*len] = 128 + (n & 127);
+ n = n >> 7;
+ (*len)++;
}
- return p;
+ buf[*len] = n;
+ (*len)++;
}
-static void rec_cache_flush (Records p)
+static void rec_decode_unsigned(unsigned *np, unsigned char *buf, int *len)
+{
+ unsigned n = 0;
+ unsigned w = 1;
+ (*len) = 0;
+
+ while (buf[*len] > 127)
+ {
+ n += w*(buf[*len] & 127);
+ w = w << 7;
+ (*len)++;
+ }
+ n += w * buf[*len];
+ (*len)++;
+ *np = n;
+}
+static void rec_cache_flush_block1 (Records p, Record rec, Record last_rec,
+ char **out_buf, int *out_size,
+ int *out_offset)
{
int i;
- for (i = 0; i<p->cache_cur; i++)
+ int len;
+
+ for (i = 0; i<REC_NO_INFO; i++)
+ {
+ if (*out_offset + (int) rec->size[i] + 20 > *out_size)
+ {
+ int new_size = *out_offset + rec->size[i] + 65536;
+ char *np = (char *) xmalloc (new_size);
+ if (*out_offset)
+ memcpy (np, *out_buf, *out_offset);
+ xfree (*out_buf);
+ *out_size = new_size;
+ *out_buf = np;
+ }
+ if (i == 0)
+ {
+ rec_encode_unsigned (rec->sysno, *out_buf + *out_offset, &len);
+ (*out_offset) += len;
+ }
+ if (rec->size[i] == 0)
+ {
+ rec_encode_unsigned (1, *out_buf + *out_offset, &len);
+ (*out_offset) += len;
+ }
+ else if (last_rec && rec->size[i] == last_rec->size[i] &&
+ !memcmp (rec->info[i], last_rec->info[i], rec->size[i]))
+ {
+ rec_encode_unsigned (0, *out_buf + *out_offset, &len);
+ (*out_offset) += len;
+ }
+ else
+ {
+ rec_encode_unsigned (rec->size[i]+1, *out_buf + *out_offset, &len);
+ (*out_offset) += len;
+ memcpy (*out_buf + *out_offset, rec->info[i], rec->size[i]);
+ (*out_offset) += rec->size[i];
+ }
+ }
+}
+
+static void rec_write_multiple (Records p, int saveCount)
+{
+ int i;
+ int ref_count = 0;
+ Record last_rec = 0;
+ int out_size = 1000;
+ int out_offset = 0;
+ char *out_buf = (char *) xmalloc (out_size);
+ int *sysnos = (int *) xmalloc (sizeof(*sysnos) * (p->cache_cur + 1));
+ int *sysnop = sysnos;
+
+ for (i = 0; i<p->cache_cur - saveCount; i++)
{
struct record_cache_entry *e = p->record_cache + i;
switch (e->flag)
{
- case recordFlagNop:
+ case recordFlagNew:
+ rec_cache_flush_block1 (p, e->rec, last_rec, &out_buf,
+ &out_size, &out_offset);
+ *sysnop++ = e->rec->sysno;
+ ref_count++;
+ e->flag = recordFlagNop;
+ last_rec = e->rec;
break;
case recordFlagWrite:
+ rec_release_blocks (p, e->rec->sysno);
+ rec_cache_flush_block1 (p, e->rec, last_rec, &out_buf,
+ &out_size, &out_offset);
+ *sysnop++ = e->rec->sysno;
+ ref_count++;
+ e->flag = recordFlagNop;
+ last_rec = e->rec;
+ break;
+ default:
+ break;
+ }
+ }
+ *sysnop = -1;
+ if (ref_count)
+ {
+ int csize = out_offset + (out_offset >> 6) + 620;
+
+ rec_tmp_expand (p, csize);
+#if HAVE_BZLIB_H
+ i = bzBuffToBuffCompress (p->tmp_buf+2*sizeof(int), &csize,
+ out_buf, out_offset, 9, 0, 30);
+ if (i != BZ_OK)
+ {
+ logf (LOG_FATAL, "bzBuffToCompress error code=%d", i);
+ exit (1);
+ }
+#else
+ memcpy (p->tmp_buf + 2*sizeof(int), out_buf, out_offset);
+ csize = out_offset;
+#endif
+ memcpy (p->tmp_buf + sizeof(int), &ref_count, sizeof(ref_count));
+ /* -------- compression */
+ rec_write_tmp_buf (p, csize + sizeof(int), sysnos);
+ }
+ xfree (out_buf);
+ xfree (sysnos);
+}
+
+static void rec_cache_flush (Records p, int saveCount)
+{
+ int i, j;
+
+ if (saveCount >= p->cache_cur)
+ saveCount = 0;
+
+ rec_write_multiple (p, saveCount);
+ for (i = 0; i<p->cache_cur - saveCount; i++)
+ {
+ struct record_cache_entry *e = p->record_cache + i;
+ switch (e->flag)
+ {
+ case recordFlagNop:
+ break;
+ case recordFlagNew:
rec_write_single (p, e->rec);
break;
+ case recordFlagWrite:
+ rec_update_single (p, e->rec);
+ break;
case recordFlagDelete:
rec_delete_single (p, e->rec);
break;
}
rec_rm (&e->rec);
}
- p->cache_cur = 0;
+ for (j = 0; j<saveCount; j++, i++)
+ memcpy (p->record_cache+j, p->record_cache+i,
+ sizeof(*p->record_cache));
+ p->cache_cur = saveCount;
}
static Record *rec_cache_lookup (Records p, int sysno,
struct record_cache_entry *e = p->record_cache + i;
if (e->rec->sysno == sysno)
{
- if (flag != recordFlagNop)
+ if (flag != recordFlagNop && e->flag == recordFlagNop)
e->flag = flag;
return &e->rec;
}
struct record_cache_entry *e;
if (p->cache_cur == p->cache_max)
- rec_cache_flush (p);
+ rec_cache_flush (p, 1);
+ else if (p->cache_cur > 0)
+ {
+ int i, j;
+ int used = 0;
+ for (i = 0; i<p->cache_cur; i++)
+ {
+ Record r = (p->record_cache + i)->rec;
+ for (j = 0; j<REC_NO_INFO; j++)
+ used += r->size[j];
+ }
+ if (used > 256000)
+ rec_cache_flush (p, 1);
+ }
assert (p->cache_cur < p->cache_max);
e = p->record_cache + (p->cache_cur)++;
assert (p);
- rec_cache_flush (p);
- free (p->record_cache);
+ rec_cache_flush (p, 0);
+ xfree (p->record_cache);
if (p->rw)
rec_write_head (p);
{
if (p->data_BFile[i])
bf_close (p->data_BFile[i]);
- free (p->data_fname[i]);
+ xfree (p->data_fname[i]);
}
- free (p->tmp_buf);
- free (p);
+ xfree (p->tmp_buf);
+ xfree (p);
*pp = NULL;
}
Record rec_get (Records p, int sysno)
{
- int i;
+ int i, in_size;
Record rec, *recp;
struct record_index_entry entry;
int freeblock, dst_type;
char *nptr, *cptr;
+ char *in_buf = 0;
assert (sysno > 0);
assert (p);
if ((recp = rec_cache_lookup (p, sysno, recordFlagNop)))
return rec_cp (*recp);
- read_indx (p, sysno, &entry, sizeof(entry), 0);
+ if (!read_indx (p, sysno, &entry, sizeof(entry), 1))
+ return NULL; /* record is not there! */
- dst_type = entry.u.used.next & 7;
- freeblock = entry.u.used.next / 8;
+ if (!entry.size)
+ return NULL; /* record is deleted */
+
+ dst_type = entry.next & 7;
+ assert (dst_type < REC_BLOCK_TYPES);
+ freeblock = entry.next / 8;
assert (freeblock > 0);
- if (!(rec = malloc (sizeof(*rec))))
- {
- logf (LOG_FATAL|LOG_ERRNO, "malloc");
- exit (1);
- }
- rec_tmp_expand (p, entry.u.used.size, dst_type);
+ rec = (Record) xmalloc (sizeof(*rec));
+ rec_tmp_expand (p, entry.size);
cptr = p->tmp_buf;
bf_read (p->data_BFile[dst_type], freeblock, 0, 0, cptr);
}
rec->sysno = sysno;
- nptr = p->tmp_buf + sizeof(freeblock);
- for (i = 0; i < REC_NO_INFO; i++)
+#if HAVE_BZLIB_H
+ in_size = entry.size * 30+100;
+ in_buf = (char *) xmalloc (in_size);
+ i = bzBuffToBuffDecompress (in_buf, &in_size, p->tmp_buf+2*sizeof(int),
+ entry.size-sizeof(int), 0, 4);
+ if (i != BZ_OK)
{
- memcpy (&rec->size[i], nptr, sizeof(*rec->size));
- nptr += sizeof(*rec->size);
- if (rec->size[i])
- {
- rec->info[i] = malloc (rec->size[i]);
- memcpy (rec->info[i], nptr, rec->size[i]);
- nptr += rec->size[i];
- }
- else
- rec->info[i] = NULL;
+ logf (LOG_FATAL, "bzBuffToDecompress error code=%d", i);
+ exit (1);
}
+#else
+ in_buf = p->tmp_buf + 2*sizeof(int);
+ in_size = entry.size - sizeof(int);
+#endif
+ nptr = in_buf; /* skip ref count */
+ while (nptr < in_buf + in_size)
+ {
+ int this_sysno;
+ int len;
+ rec_decode_unsigned (&this_sysno, nptr, &len);
+ nptr += len;
+
+ for (i = 0; i < REC_NO_INFO; i++)
+ {
+ int this_size;
+ rec_decode_unsigned (&this_size, nptr, &len);
+ nptr += len;
+
+ if (this_size == 0)
+ continue;
+ rec->size[i] = this_size-1;
+
+ if (rec->size[i])
+ {
+ rec->info[i] = (char *) xmalloc (rec->size[i]);
+ memcpy (rec->info[i], nptr, rec->size[i]);
+ nptr += rec->size[i];
+ }
+ else
+ rec->info[i] = NULL;
+ }
+ if (this_sysno == sysno)
+ break;
+ }
+ xfree (in_buf);
rec_cache_insert (p, rec, recordFlagNop);
return rec;
}
Record rec;
assert (p);
- if (!(rec = malloc (sizeof(*rec))))
- {
- logf (LOG_FATAL|LOG_ERRNO, "malloc");
- exit (1);
- }
- if (p->head.index_free == 0)
+ rec = (Record) xmalloc (sizeof(*rec));
+ if (1 || p->head.index_free == 0)
sysno = (p->head.index_last)++;
else
{
read_indx (p, p->head.index_free, &entry, sizeof(entry), 0);
sysno = p->head.index_free;
- p->head.index_free = entry.u.free.next;
+ p->head.index_free = entry.next;
}
(p->head.no_records)++;
rec->sysno = sysno;
rec->info[i] = NULL;
rec->size[i] = 0;
}
- rec_cache_insert (p, rec, recordFlagWrite);
+ rec_cache_insert (p, rec, recordFlagNew);
return rec;
}
{
Record *recp;
+ (p->head.no_records)--;
if ((recp = rec_cache_lookup (p, (*recpp)->sysno, recordFlagDelete)))
{
rec_rm (recp);
void rec_rm (Record *recpp)
{
int i;
- for (i = 0; i < REC_NO_INFO; i++)
- free ((*recpp)->info[i]);
- free (*recpp);
- *recpp = NULL;
-}
-
-Record rec_cp (Record rec)
-{
- Record n;
- int i;
- if (!(n = malloc (sizeof(*n))))
- {
- logf (LOG_FATAL|LOG_ERRNO, "malloc");
- exit (1);
- }
- n->sysno = rec->sysno;
- for (i = 0; i < REC_NO_INFO; i++)
- if (!rec->info[i])
- {
- n->info[i] = NULL;
- n->size[i] = 0;
- }
- else
- {
- n->size[i] = rec->size[i];
- if (!(n->info[i] = malloc (rec->size[i])))
- {
- logf (LOG_FATAL|LOG_ERRNO, "malloc. rec_cp");
- exit (1);
- }
- memcpy (n->info[i], rec->info[i], rec->size[i]);
- }
- return n;
-}
-
-/* no BF --------------------------------------------------- */
-#else
-
-struct records_info {
- int rw;
- int index_fd;
- char *index_fname;
- int data_fd;
- char *data_fname;
- struct records_head {
- char magic[8];
- int no_records;
- int index_free;
- int index_last;
- int data_size;
- int data_slack;
- int data_used;
- } head;
- char *tmp_buf;
- int tmp_size;
- int cache_size;
- int cache_cur;
- int cache_max;
- struct record_cache_entry *record_cache;
-};
-
-struct record_cache_entry {
- Record rec;
- int dirty;
-};
-
-struct record_index_entry {
- union {
- struct {
- int offset;
- int size;
- } used;
- struct {
- int next;
- } free;
- } u;
-};
-
-#define REC_HEAD_MAGIC "rechead"
-
-static void rec_write_head (Records p)
-{
- int r;
-
- assert (p);
- assert (p->index_fd != -1);
- if (lseek (p->index_fd, (off_t) 0, SEEK_SET) == -1)
- {
- logf (LOG_FATAL|LOG_ERRNO, "lseek to 0 in %s", p->index_fname);
- exit (1);
- }
- r = write (p->index_fd, &p->head, sizeof(p->head));
- switch (r)
- {
- case -1:
- logf (LOG_FATAL|LOG_ERRNO, "write head of %s", p->index_fname);
- exit (1);
- case sizeof(p->head):
- break;
- default:
- logf (LOG_FATAL, "write head of %s. wrote %d", p->index_fname, r);
- exit (1);
- }
-}
-
-Records rec_open (int rw)
-{
- Records p;
- int r;
-
- if (!(p = malloc (sizeof(*p))))
- {
- logf (LOG_FATAL|LOG_ERRNO, "malloc");
- exit (1);
- }
- p->rw = rw;
- p->tmp_buf = NULL;
- p->tmp_size = 0;
- p->data_fname = "recdata";
- p->data_fd = -1;
- p->index_fname = "recindex";
- p->index_fd = open (p->index_fname,
- rw ? (O_RDWR|O_CREAT) : O_RDONLY, 0666);
- if (p->index_fd == -1)
- {
- logf (LOG_FATAL|LOG_ERRNO, "open %s", p->index_fname);
- exit (1);
- }
- r = read (p->index_fd, &p->head, sizeof(p->head));
- switch (r)
- {
- case -1:
- logf (LOG_FATAL|LOG_ERRNO, "read %s", p->index_fname);
- exit (1);
- case 0:
- memcpy (p->head.magic, REC_HEAD_MAGIC, sizeof(p->head.magic));
- p->head.index_free = 0;
- p->head.index_last = 1;
- p->head.no_records = 0;
- p->head.data_size = 0;
- p->head.data_slack = 0;
- p->head.data_used = 0;
- if (rw)
- rec_write_head (p);
- break;
- case sizeof(p->head):
- if (memcmp (p->head.magic, REC_HEAD_MAGIC, sizeof(p->head.magic)))
- {
- logf (LOG_FATAL, "read %s. bad header", p->index_fname);
- exit (1);
- }
- break;
- default:
- logf (LOG_FATAL, "read head of %s. expected %d. got %d",
- p->index_fname, sizeof(p->head), r);
- exit (1);
- }
- p->data_fd = open (p->data_fname,
- rw ? (O_RDWR|O_CREAT) : O_RDONLY, 0666);
- if (p->data_fd == -1)
- {
- logf (LOG_FATAL|LOG_ERRNO, "open %s", p->data_fname);
- exit (1);
- }
- p->cache_max = 10;
- p->cache_cur = 0;
- if (!(p->record_cache = malloc (sizeof(*p->record_cache)*p->cache_max)))
- {
- logf (LOG_FATAL|LOG_ERRNO, "malloc");
- exit (1);
- }
- return p;
-}
-
-static void read_indx (Records p, int sysno, void *buf, int itemsize)
-{
- int r;
- off_t pos = (sysno-1)*itemsize + sizeof(p->head);
-
- if (lseek (p->index_fd, pos, SEEK_SET) == (pos) -1)
- {
- logf (LOG_FATAL|LOG_ERRNO, "seek in %s to pos %ld",
- p->index_fname, (long) pos);
- exit (1);
- }
- r = read (p->index_fd, buf, itemsize);
- if (r != itemsize)
- {
- if (r == -1)
- logf (LOG_FATAL|LOG_ERRNO, "read in %s at pos %ld",
- p->index_fname, (long) pos);
- else
- logf (LOG_FATAL, "read in %s at pos %ld",
- p->index_fname, (long) pos);
- exit (1);
- }
-}
-
-static void rec_write_single (Records p, Record rec)
-{
- struct record_index_entry entry;
- int r, i, size = 0, got;
- char *cptr;
- off_t pos = (rec->sysno-1)*sizeof(entry) + sizeof(p->head);
-
- for (i = 0; i < REC_NO_INFO; i++)
- if (!rec->info[i])
- size += sizeof(*rec->size);
- else
- size += sizeof(*rec->size) + rec->size[i];
-
- entry.u.used.offset = p->head.data_size;
- entry.u.used.size = size;
- p->head.data_size += size;
- p->head.data_used += size;
-
- if (lseek (p->index_fd, pos, SEEK_SET) == (pos) -1)
- {
- logf (LOG_FATAL|LOG_ERRNO, "seek in %s to pos %ld",
- p->index_fname, (long) pos);
- exit (1);
- }
- r = write (p->index_fd, &entry, sizeof(entry));
- if (r != sizeof(entry))
- {
- if (r == -1)
- logf (LOG_FATAL|LOG_ERRNO, "write of %s at pos %ld",
- p->index_fname, (long) pos);
- else
- logf (LOG_FATAL, "write of %s at pos %ld",
- p->index_fname, (long) pos);
- exit (1);
- }
- if (lseek (p->data_fd, entry.u.used.offset, SEEK_SET) == -1)
- {
- logf (LOG_FATAL|LOG_ERRNO, "lseek in %s to pos %ld",
- p->data_fname, entry.u.used.offset);
- exit (1);
- }
- if (p->tmp_size < entry.u.used.size)
- {
- free (p->tmp_buf);
- p->tmp_size = entry.u.used.size + 16384;
- if (!(p->tmp_buf = malloc (p->tmp_size)))
- {
- logf (LOG_FATAL|LOG_ERRNO, "malloc");
- exit (1);
- }
- }
- cptr = p->tmp_buf;
- for (i = 0; i < REC_NO_INFO; i++)
- {
- memcpy (cptr, &rec->size[i], sizeof(*rec->size));
- cptr += sizeof(*rec->size);
- if (rec->info[i])
- {
- memcpy (cptr, rec->info[i], rec->size[i]);
- cptr += rec->size[i];
- }
- }
- for (got = 0; got < entry.u.used.size; got += r)
- {
- r = write (p->data_fd, p->tmp_buf + got, entry.u.used.size - got);
- if (r <= 0)
- {
- logf (LOG_FATAL|LOG_ERRNO, "write of %s", p->data_fname);
- exit (1);
- }
- }
-}
-
-static void rec_cache_flush (Records p)
-{
- int i;
- for (i = 0; i<p->cache_cur; i++)
- {
- struct record_cache_entry *e = p->record_cache + i;
- if (e->dirty)
- rec_write_single (p, e->rec);
- rec_rm (&e->rec);
- }
- p->cache_cur = 0;
-}
-
-static Record *rec_cache_lookup (Records p, int sysno, int dirty)
-{
- int i;
- for (i = 0; i<p->cache_cur; i++)
- {
- struct record_cache_entry *e = p->record_cache + i;
- if (e->rec->sysno == sysno)
- {
- if (dirty)
- e->dirty = 1;
- return &e->rec;
- }
- }
- return NULL;
-}
-
-static void rec_cache_insert (Records p, Record rec, int dirty)
-{
- struct record_cache_entry *e;
-
- if (p->cache_cur == p->cache_max)
- rec_cache_flush (p);
- assert (p->cache_cur < p->cache_max);
-
- e = p->record_cache + (p->cache_cur)++;
- e->dirty = dirty;
- e->rec = rec_cp (rec);
-}
-
-void rec_close (Records *p)
-{
- assert (*p);
-
- rec_cache_flush (*p);
- free ((*p)->record_cache);
-
- if ((*p)->rw)
- rec_write_head (*p);
-
- if ((*p)->index_fd != -1)
- close ((*p)->index_fd);
-
- if ((*p)->data_fd != -1)
- close ((*p)->data_fd);
-
- free ((*p)->tmp_buf);
-
- free (*p);
- *p = NULL;
-}
-
-Record rec_get (Records p, int sysno)
-{
- int i;
- Record rec, *recp;
- struct record_index_entry entry;
- int r, got;
- char *nptr;
-
- assert (sysno > 0);
- assert (p);
-
- if ((recp = rec_cache_lookup (p, sysno, 0)))
- return rec_cp (*recp);
-
- read_indx (p, sysno, &entry, sizeof(entry));
-
- if (!(rec = malloc (sizeof(*rec))))
- {
- logf (LOG_FATAL|LOG_ERRNO, "malloc");
- exit (1);
- }
- if (lseek (p->data_fd, entry.u.used.offset, SEEK_SET) == -1)
- {
- logf (LOG_FATAL|LOG_ERRNO, "lseek in %s to pos %ld",
- p->data_fname, entry.u.used.offset);
- exit (1);
- }
- if (p->tmp_size < entry.u.used.size)
- {
- free (p->tmp_buf);
- p->tmp_size = entry.u.used.size + 16384;
- if (!(p->tmp_buf = malloc (p->tmp_size)))
- {
- logf (LOG_FATAL|LOG_ERRNO, "malloc");
- exit (1);
- }
- }
- for (got = 0; got < entry.u.used.size; got += r)
- {
- r = read (p->data_fd, p->tmp_buf + got, entry.u.used.size - got);
- if (r <= 0)
- {
- logf (LOG_FATAL|LOG_ERRNO, "read of %s", p->data_fname);
- exit (1);
- }
- }
- rec->sysno = sysno;
-
- nptr = p->tmp_buf;
- for (i = 0; i < REC_NO_INFO; i++)
- {
- memcpy (&rec->size[i], nptr, sizeof(*rec->size));
- nptr += sizeof(*rec->size);
- if (rec->size[i])
- {
- rec->info[i] = malloc (rec->size[i]);
- memcpy (rec->info[i], nptr, rec->size[i]);
- nptr += rec->size[i];
- }
- else
- rec->info[i] = NULL;
- }
- rec_cache_insert (p, rec, 0);
- return rec;
-}
-
-Record rec_new (Records p)
-{
- int sysno, i;
- Record rec;
-
- assert (p);
- if (!(rec = malloc (sizeof(*rec))))
- {
- logf (LOG_FATAL|LOG_ERRNO, "malloc");
- exit (1);
- }
- if (p->head.index_free == 0)
- sysno = (p->head.index_last)++;
- else
- {
- struct record_index_entry entry;
-
- read_indx (p, p->head.index_free, &entry, sizeof(entry));
- sysno = p->head.index_free;
- p->head.index_free = entry.u.free.next;
- }
- (p->head.no_records)++;
- rec->sysno = sysno;
- for (i = 0; i < REC_NO_INFO; i++)
- {
- rec->info[i] = NULL;
- rec->size[i] = 0;
- }
- rec_cache_insert (p, rec, 1);
- return rec;
-}
-
-void rec_put (Records p, Record *recpp)
-{
- Record *recp;
-
- if ((recp = rec_cache_lookup (p, (*recpp)->sysno, 1)))
- {
- rec_rm (recp);
- *recp = *recpp;
- }
- else
- {
- rec_cache_insert (p, *recpp, 1);
- rec_rm (recpp);
- }
- *recpp = NULL;
-}
-
-void rec_rm (Record *recpp)
-{
- int i;
+ if (!*recpp)
+ return ;
for (i = 0; i < REC_NO_INFO; i++)
- free ((*recpp)->info[i]);
- free (*recpp);
+ xfree ((*recpp)->info[i]);
+ xfree (*recpp);
*recpp = NULL;
}
Record n;
int i;
- if (!(n = malloc (sizeof(*n))))
- {
- logf (LOG_FATAL|LOG_ERRNO, "malloc");
- exit (1);
- }
+ n = (Record) xmalloc (sizeof(*n));
n->sysno = rec->sysno;
for (i = 0; i < REC_NO_INFO; i++)
if (!rec->info[i])
else
{
n->size[i] = rec->size[i];
- if (!(n->info[i] = malloc (rec->size[i])))
- {
- logf (LOG_FATAL|LOG_ERRNO, "malloc. rec_cp");
- exit (1);
- }
+ n->info[i] = (char *) xmalloc (rec->size[i]);
memcpy (n->info[i], rec->info[i], rec->size[i]);
}
return n;
}
-void rec_del (Records p, Record *recpp)
-{
- assert (0);
-}
-
-
-#endif
char *rec_strdup (const char *s, size_t *len)
{
return NULL;
}
*len = strlen(s)+1;
- p = malloc (*len);
- if (!p)
- {
- logf (LOG_FATAL|LOG_ERRNO, "malloc");
- exit (1);
- }
+ p = (char *) xmalloc (*len);
strcpy (p, s);
return p;
}
projects / idzebra-moved-to-github.git / blobdiff