+/* $Id: recindex.c,v 1.34 2002-08-02 19:26:55 adam Exp $
+ Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002
+ Index Data Aps
+
+This file is part of the Zebra server.
+
+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
+Software Foundation; either version 2, or (at your option) any later
+version.
+
+Zebra is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+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.
+*/
+
+
+
+
/*
- * Copyright (C) 1994-1995, Index Data I/S
- * All rights reserved.
- * Sebastian Hammer, Adam Dickmeiss
+ * Format of first block
+ * next (4 bytes)
+ * ref_count (4 bytes)
+ * block (504 bytes)
*
- * $Log: recindex.c,v $
- * Revision 1.1 1995-11-15 14:46:20 adam
- * Started work on better record management system.
+ * 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 REC_HEAD_MAGIC "rechead"
+#include "recindxp.h"
+#if HAVE_BZLIB_H
+#include <bzlib.h>
+#endif
static void rec_write_head (Records p)
{
int r;
assert (p);
- assert (p->fd != -1);
- if (lseek (p->fd, (off_t) 0, SEEK_SET) == -1)
+ assert (p->index_BFile);
+
+ r = bf_write (p->index_BFile, 0, 0, sizeof(p->head), &p->head);
+ if (r)
{
- logf (LOG_FATAL|LOG_ERRNO, "lseek to 0 in %s", p->fname);
+ logf (LOG_FATAL|LOG_ERRNO, "write head of %s", p->index_fname);
exit (1);
}
- r = write (p->fd, &p->head, sizeof(p->head));
- switch (r)
+}
+
+static void rec_tmp_expand (Records p, int size)
+{
+ if (p->tmp_size < size + 2048 ||
+ p->tmp_size < p->head.block_size[REC_BLOCK_TYPES-1]*2)
{
- case -1:
- logf (LOG_FATAL|LOG_ERRNO, "write head of %s", p->fname);
- exit (1);
- case sizeof(p->head):
- break;
- default:
- logf (LOG_FATAL, "write head of %s. wrote %d", p->fname, r);
- 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);
}
}
-Records rec_open (int rw)
+static int read_indx (Records p, int sysno, void *buf, int itemsize,
+ int ignoreError)
{
- Records p;
int r;
+ int pos = (sysno-1)*itemsize;
- if (!(p = malloc (sizeof(*p))))
+ r = bf_read (p->index_BFile, 1+pos/128, pos%128, itemsize, buf);
+ if (r != 1 && !ignoreError)
{
- logf (LOG_FATAL|LOG_ERRNO, "malloc");
+ logf (LOG_FATAL|LOG_ERRNO, "read in %s at pos %ld",
+ p->index_fname, (long) pos);
exit (1);
}
- p->fname = "recindex";
- p->fd = open (p->fname, rw ? (O_RDWR|O_CREAT) : O_RDONLY, 0666);
- if (p->fd == -1)
+ return r;
+}
+
+static void write_indx (Records p, int sysno, void *buf, int itemsize)
+{
+ int pos = (sysno-1)*itemsize;
+
+ bf_write (p->index_BFile, 1+pos/128, pos%128, itemsize, buf);
+}
+
+static void rec_release_blocks (Records p, int sysno)
+{
+ struct record_index_entry entry;
+ int freeblock;
+ char block_and_ref[sizeof(short) + sizeof(int)];
+ int dst_type;
+ int first = 1;
+
+ if (read_indx (p, sysno, &entry, sizeof(entry), 1) != 1)
+ return ;
+
+ 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(block_and_ref), block_and_ref) != 1)
+ {
+ logf (LOG_FATAL|LOG_ERRNO, "read in rec_del_single");
+ exit (1);
+ }
+ if (first)
+ {
+ short ref;
+ memcpy (&ref, block_and_ref + sizeof(int), sizeof(ref));
+ --ref;
+ memcpy (block_and_ref + sizeof(int), &ref, sizeof(ref));
+ if (ref)
+ {
+ 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;
+ memcpy (&freeblock, block_and_ref, sizeof(int));
+
+ p->head.block_used[dst_type]--;
+ }
+ p->head.total_bytes -= entry.size;
+}
+
+static void rec_delete_single (Records p, Record rec)
+{
+ struct record_index_entry entry;
+
+ rec_release_blocks (p, rec->sysno);
+
+ 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)
+{
+ 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];
+ if (block_free)
+ {
+ if (bf_read (p->data_BFile[dst_type],
+ block_free, 0, sizeof(*p->head.block_free),
+ &p->head.block_free[dst_type]) != 1)
+ {
+ 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.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
+ {
+ memcpy (cptr, &block_free, sizeof(int));
+ bf_write (p->data_BFile[dst_type], block_prev, 0, 0, cptr);
+ cptr = p->tmp_buf + no_written;
+ }
+ block_prev = block_free;
+ no_written += p->head.block_size[dst_type] - sizeof(int);
+ p->head.block_used[dst_type]++;
+ }
+ assert (block_prev != -1);
+ block_free = 0;
+ memcpy (cptr, &block_free, sizeof(int));
+ bf_write (p->data_BFile[dst_type], block_prev, 0,
+ sizeof(int) + (p->tmp_buf+size) - cptr, cptr);
+}
+
+Records rec_open (BFiles bfs, int rw, int compression_method)
+{
+ Records p;
+ int i, r;
+ int version;
+
+ p = (Records) xmalloc (sizeof(*p));
+ p->compression_method = compression_method;
+ p->rw = rw;
+ p->tmp_size = 1024;
+ 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->fname);
+ logf (LOG_FATAL|LOG_ERRNO, "open %s", p->index_fname);
exit (1);
}
- r = read (p->fd, &p->head, sizeof(p->head));
+ r = bf_read (p->index_BFile, 0, 0, 0, p->tmp_buf);
switch (r)
{
- case -1:
- logf (LOG_FATAL|LOG_ERRNO, "read %s", p->fname);
- exit (1);
case 0:
+ memcpy (p->head.magic, REC_HEAD_MAGIC, sizeof(p->head.magic));
+ sprintf (p->head.version, "%3d", REC_VERSION);
+ p->head.index_free = 0;
+ p->head.index_last = 1;
p->head.no_records = 0;
- p->head.freelist = 0;
+ p->head.total_bytes = 0;
+ for (i = 0; i<REC_BLOCK_TYPES; i++)
+ {
+ p->head.block_free[i] = 0;
+ p->head.block_last[i] = 1;
+ p->head.block_used[i] = 0;
+ }
+ p->head.block_size[0] = 128;
+ p->head.block_move[0] = 0;
+ for (i = 1; i<REC_BLOCK_TYPES; i++)
+ {
+ p->head.block_size[i] = p->head.block_size[i-1] * 4;
+ p->head.block_move[i] = p->head.block_size[i] * 24;
+ }
if (rw)
rec_write_head (p);
break;
- case sizeof(p->head):
+ case 1:
+ memcpy (&p->head, p->tmp_buf, sizeof(p->head));
if (memcmp (p->head.magic, REC_HEAD_MAGIC, sizeof(p->head.magic)))
{
- logf (LOG_FATAL, "read %s. bad header", p->fname);
+ logf (LOG_FATAL, "file %s has bad format", p->index_fname);
exit (1);
}
+ version = atoi (p->head.version);
+ if (version != REC_VERSION)
+ {
+ logf (LOG_FATAL, "file %s is version %d, but version"
+ " %d is required", p->index_fname, version, REC_VERSION);
+ exit (1);
+ }
break;
- default:
- logf (LOG_FATAL, "read head of %s. expected %d. got %d",
- p->fname, sizeof(p->head), r);
- exit (1);
}
+ for (i = 0; i<REC_BLOCK_TYPES; i++)
+ {
+ char str[80];
+ 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 (bfs, p->data_fname[i],
+ p->head.block_size[i],
+ rw)))
+ {
+ logf (LOG_FATAL|LOG_ERRNO, "bf_open %s", p->data_fname[i]);
+ exit (1);
+ }
+ }
+ p->cache_max = 400;
+ p->cache_cur = 0;
+ p->record_cache = (struct record_cache_entry *)
+ xmalloc (sizeof(*p->record_cache)*p->cache_max);
+ zebra_mutex_init (&p->mutex);
return p;
}
-void rec_close (Records p)
+static void rec_encode_unsigned (unsigned n, unsigned char *buf, int *len)
{
- if (p->fd != -1)
- close (p->fd);
- free (p);
+ (*len) = 0;
+ while (n > 127)
+ {
+ buf[*len] = 128 + (n & 127);
+ n = n >> 7;
+ (*len)++;
+ }
+ buf[*len] = n;
+ (*len)++;
}
-Record rec_get (Records p, int sysno)
+static void rec_decode_unsigned(unsigned *np, unsigned char *buf, int *len)
{
- assert (p);
+ 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;
+ 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;
+ short ref_count = 0;
+ char compression_method;
+ 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 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;
+ case recordFlagDelete:
+ rec_delete_single (p, e->rec);
+ e->flag = recordFlagNop;
+ break;
+ default:
+ break;
+ }
+ }
+
+ *sysnop = -1;
+ if (ref_count)
+ {
+ int csize = 0; /* indicate compression "not performed yet" */
+ compression_method = p->compression_method;
+ switch (compression_method)
+ {
+ case REC_COMPRESS_BZIP2:
+#if HAVE_BZLIB_H
+ csize = out_offset + (out_offset >> 6) + 620;
+ rec_tmp_expand (p, csize);
+#ifdef BZ_CONFIG_ERROR
+ i = BZ2_bzBuffToBuffCompress
+#else
+ i = bzBuffToBuffCompress
+#endif
+ (p->tmp_buf+sizeof(int)+sizeof(short)+
+ sizeof(char),
+ &csize, out_buf, out_offset, 1, 0, 30);
+ if (i != BZ_OK)
+ {
+ logf (LOG_WARN, "bzBuffToBuffCompress error code=%d", i);
+ csize = 0;
+ }
+ logf (LOG_LOG, "compress %4d %5d %5d", ref_count, out_offset,
+ csize);
+#endif
+ break;
+ case REC_COMPRESS_NONE:
+ break;
+ }
+ if (!csize)
+ {
+ /* either no compression or compression not supported ... */
+ csize = out_offset;
+ rec_tmp_expand (p, csize);
+ memcpy (p->tmp_buf + sizeof(int) + sizeof(short) + sizeof(char),
+ out_buf, out_offset);
+ csize = out_offset;
+ compression_method = REC_COMPRESS_NONE;
+ }
+ memcpy (p->tmp_buf + sizeof(int), &ref_count, sizeof(ref_count));
+ memcpy (p->tmp_buf + sizeof(int)+sizeof(short),
+ &compression_method, sizeof(compression_method));
+
+ /* -------- compression */
+ rec_write_tmp_buf (p, csize + sizeof(short) + sizeof(char), 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;
+ rec_rm (&e->rec);
+ }
+ /* i still being used ... */
+ 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,
+ enum recordCacheFlag flag)
+{
+ 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 (flag != recordFlagNop && e->flag == recordFlagNop)
+ e->flag = flag;
+ return &e->rec;
+ }
+ }
return NULL;
}
-Record rec_new (Records p)
+static void rec_cache_insert (Records p, Record rec, enum recordCacheFlag flag)
+{
+ struct record_cache_entry *e;
+
+ if (p->cache_cur == p->cache_max)
+ 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 > 90000)
+ rec_cache_flush (p, 1);
+ }
+ assert (p->cache_cur < p->cache_max);
+
+ e = p->record_cache + (p->cache_cur)++;
+ e->flag = flag;
+ e->rec = rec_cp (rec);
+}
+
+void rec_close (Records *pp)
{
+ Records p = *pp;
+ int i;
+
assert (p);
- return NULL;
+
+ zebra_mutex_destroy (&p->mutex);
+ rec_cache_flush (p, 0);
+ xfree (p->record_cache);
+
+ if (p->rw)
+ rec_write_head (p);
+
+ if (p->index_BFile)
+ bf_close (p->index_BFile);
+
+ for (i = 0; i<REC_BLOCK_TYPES; i++)
+ {
+ if (p->data_BFile[i])
+ bf_close (p->data_BFile[i]);
+ xfree (p->data_fname[i]);
+ }
+ xfree (p->tmp_buf);
+ xfree (p);
+ *pp = NULL;
}
-void rec_put (Records p, Record rec)
+static Record rec_get_int (Records p, int sysno)
{
+ int i, in_size, r;
+ Record rec, *recp;
+ struct record_index_entry entry;
+ int freeblock, dst_type;
+ char *nptr, *cptr;
+ char *in_buf = 0;
+ char *bz_buf = 0;
+#if HAVE_BZLIB_H
+ int bz_size;
+#endif
+ char compression_method;
+
+ assert (sysno > 0);
assert (p);
+
+ if ((recp = rec_cache_lookup (p, sysno, recordFlagNop)))
+ return rec_cp (*recp);
+
+ if (read_indx (p, sysno, &entry, sizeof(entry), 1) < 1)
+ return NULL; /* record is not there! */
+
+ 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);
+
+ rec_tmp_expand (p, entry.size);
+
+ cptr = p->tmp_buf;
+ r = bf_read (p->data_BFile[dst_type], freeblock, 0, 0, cptr);
+ if (r < 0)
+ return 0;
+ memcpy (&freeblock, cptr, sizeof(freeblock));
+
+ while (freeblock)
+ {
+ int tmp;
+
+ cptr += p->head.block_size[dst_type] - sizeof(freeblock);
+
+ memcpy (&tmp, cptr, sizeof(tmp));
+ r = bf_read (p->data_BFile[dst_type], freeblock, 0, 0, cptr);
+ if (r < 0)
+ return 0;
+ memcpy (&freeblock, cptr, sizeof(freeblock));
+ memcpy (cptr, &tmp, sizeof(tmp));
+ }
+
+ rec = (Record) xmalloc (sizeof(*rec));
+ rec->sysno = sysno;
+ memcpy (&compression_method, p->tmp_buf + sizeof(int) + sizeof(short),
+ sizeof(compression_method));
+ in_buf = p->tmp_buf + sizeof(int) + sizeof(short) + sizeof(char);
+ in_size = entry.size - sizeof(short) - sizeof(char);
+ switch (compression_method)
+ {
+ case REC_COMPRESS_BZIP2:
+#if HAVE_BZLIB_H
+ bz_size = entry.size * 20 + 100;
+ while (1)
+ {
+ bz_buf = (char *) xmalloc (bz_size);
+#ifdef BZ_CONFIG_ERROR
+ i = BZ2_bzBuffToBuffDecompress
+#else
+ i = bzBuffToBuffDecompress
+#endif
+ (bz_buf, &bz_size, in_buf, in_size, 0, 0);
+ logf (LOG_LOG, "decompress %5d %5d", in_size, bz_size);
+ if (i == BZ_OK)
+ break;
+ logf (LOG_LOG, "failed");
+ xfree (bz_buf);
+ bz_size *= 2;
+ }
+ in_buf = bz_buf;
+ in_size = bz_size;
+#else
+ logf (LOG_FATAL, "cannot decompress record(s) in BZIP2 format");
+ exit (1);
+#endif
+ break;
+ case REC_COMPRESS_NONE:
+ break;
+ }
+ for (i = 0; i<REC_NO_INFO; i++)
+ rec->info[i] = 0;
+
+ 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] = nptr;
+ nptr += rec->size[i];
+ }
+ else
+ rec->info[i] = NULL;
+ }
+ if (this_sysno == sysno)
+ break;
+ }
+ for (i = 0; i<REC_NO_INFO; i++)
+ {
+ if (rec->info[i] && rec->size[i])
+ {
+ char *np = xmalloc (rec->size[i]+1);
+ memcpy (np, rec->info[i], rec->size[i]);
+ np[rec->size[i]] = '\0';
+ rec->info[i] = np;
+ }
+ else
+ {
+ assert (rec->info[i] == 0);
+ assert (rec->size[i] == 0);
+ }
+ }
+ xfree (bz_buf);
+ rec_cache_insert (p, rec, recordFlagNop);
+ return rec;
}
+
+Record rec_get (Records p, int sysno)
+{
+ Record rec;
+ zebra_mutex_lock (&p->mutex);
+
+ rec = rec_get_int (p, sysno);
+ zebra_mutex_unlock (&p->mutex);
+ return rec;
+}
+
+static Record rec_new_int (Records p)
+{
+ int sysno, i;
+ Record rec;
+
+ assert (p);
+ rec = (Record) xmalloc (sizeof(*rec));
+ if (1 || 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), 0);
+ sysno = p->head.index_free;
+ p->head.index_free = entry.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, recordFlagNew);
+ return rec;
+}
+
+Record rec_new (Records p)
+{
+ Record rec;
+ zebra_mutex_lock (&p->mutex);
+
+ rec = rec_new_int (p);
+ zebra_mutex_unlock (&p->mutex);
+ return rec;
+}
+
+void rec_del (Records p, Record *recpp)
+{
+ Record *recp;
+
+ zebra_mutex_lock (&p->mutex);
+ (p->head.no_records)--;
+ if ((recp = rec_cache_lookup (p, (*recpp)->sysno, recordFlagDelete)))
+ {
+ rec_rm (recp);
+ *recp = *recpp;
+ }
+ else
+ {
+ rec_cache_insert (p, *recpp, recordFlagDelete);
+ rec_rm (recpp);
+ }
+ zebra_mutex_unlock (&p->mutex);
+ *recpp = NULL;
+}
+
+void rec_put (Records p, Record *recpp)
+{
+ Record *recp;
+
+ zebra_mutex_lock (&p->mutex);
+ if ((recp = rec_cache_lookup (p, (*recpp)->sysno, recordFlagWrite)))
+ {
+ rec_rm (recp);
+ *recp = *recpp;
+ }
+ else
+ {
+ rec_cache_insert (p, *recpp, recordFlagWrite);
+ rec_rm (recpp);
+ }
+ zebra_mutex_unlock (&p->mutex);
+ *recpp = NULL;
+}
+
+void rec_rm (Record *recpp)
+{
+ int i;
+
+ if (!*recpp)
+ return ;
+ for (i = 0; i < REC_NO_INFO; i++)
+ xfree ((*recpp)->info[i]);
+ xfree (*recpp);
+ *recpp = NULL;
+}
+
+Record rec_cp (Record rec)
+{
+ Record n;
+ int i;
+
+ n = (Record) xmalloc (sizeof(*n));
+ 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];
+ n->info[i] = (char *) xmalloc (rec->size[i]);
+ memcpy (n->info[i], rec->info[i], rec->size[i]);
+ }
+ return n;
+}
+
+
+char *rec_strdup (const char *s, size_t *len)
+{
+ char *p;
+
+ if (!s)
+ {
+ *len = 0;
+ return NULL;
+ }
+ *len = strlen(s)+1;
+ p = (char *) xmalloc (*len);
+ strcpy (p, s);
+ return p;
+}
+