/* This file is part of the Zebra server.
- Copyright (C) 1994-2009 Index Data
+ Copyright (C) 1994-2011 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
*/
/*
- * Format of first block
+ * Format of first block (assumes a 512 block size)
* next (8 bytes)
* ref_count (2 bytes)
* block (500 bytes)
* (length, data) - pairs
* length = 0 if same as previous
*/
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#if HAVE_BZLIB_H
#include <bzlib.h>
#endif
+#if HAVE_ZLIB_H
+#include <zlib.h>
+#endif
#define REC_BLOCK_TYPES 2
#define REC_HEAD_MAGIC "recindex"
return ZEBRA_OK;
}
+int rec_check_compression_method(int compression_method)
+{
+ switch(compression_method)
+ {
+ case REC_COMPRESS_ZLIB:
+#if HAVE_ZLIB_H
+ return 1;
+#else
+ return 0;
+#endif
+ case REC_COMPRESS_BZIP2:
+#if HAVE_BZLIB_H
+ return 1;
+#else
+ return 0;
+#endif
+ case REC_COMPRESS_NONE:
+ return 1;
+ }
+ return 0;
+}
+
Records rec_open(BFiles bfs, int rw, int compression_method)
{
Records p;
memset(&p->head, '\0', sizeof(p->head));
p->compression_method = compression_method;
p->rw = rw;
- p->tmp_size = 1024;
+ p->tmp_size = 4096;
p->tmp_buf = (char *) xmalloc(p->tmp_size);
p->compression_chunk_size = 0;
+ if (compression_method == REC_COMPRESS_BZIP2)
+ p->compression_chunk_size = 90000;
p->recindex = recindex_open(bfs, rw, 0 /* 1=isamb for recindex */);
r = recindex_read_head(p->recindex, p->tmp_buf);
switch (r)
p->head.block_last[i] = 1;
p->head.block_used[i] = 0;
}
- p->head.block_size[0] = 128;
+ p->head.block_size[0] = 256;
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;
+ p->head.block_size[i] = p->head.block_size[i-1] * 8;
+ p->head.block_move[i] = p->head.block_size[i] * 2;
}
if (rw)
{
recindex_get_fname(p->recindex), version, REC_VERSION);
ret = ZEBRA_FAIL;
}
- p->compression_chunk_size = 90000; /* good for BZIP2 */
break;
}
for (i = 0; i<REC_BLOCK_TYPES; i++)
}
}
+static ZEBRA_RES rec_flush_shared(Records p, short ref_count, zint *sysnos,
+ char *out_buf, int out_offset)
+{
+ ZEBRA_RES ret = ZEBRA_OK;
+ if (ref_count)
+ {
+ int i;
+ unsigned int csize = 0; /* indicate compression "not performed yet" */
+ char compression_method = p->compression_method;
+ switch (compression_method)
+ {
+ case REC_COMPRESS_ZLIB:
+#if HAVE_ZLIB_H
+ csize = out_offset + (out_offset >> 6) + 620;
+ while (1)
+ {
+ int r;
+ uLongf destLen = csize;
+ rec_tmp_expand(p, csize);
+ r = compress((Bytef *) p->tmp_buf+sizeof(zint)+sizeof(short)+
+ sizeof(char),
+ &destLen, (const Bytef *) out_buf, out_offset);
+ csize = destLen;
+ if (r == Z_OK)
+ {
+ break;
+ }
+ if (r != Z_MEM_ERROR)
+ {
+ yaz_log(YLOG_WARN, "compress error: %d", r);
+ csize = 0;
+ break;
+ }
+ csize = csize * 2;
+ }
+#endif
+ break;
+ 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(zint)+sizeof(short)+
+ sizeof(char),
+ &csize, out_buf, out_offset, 1, 0, 30);
+ if (i != BZ_OK)
+ {
+ yaz_log(YLOG_WARN, "bzBuffToBuffCompress error code=%d", i);
+ csize = 0;
+ }
+#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(zint) + sizeof(short) + sizeof(char),
+ out_buf, out_offset);
+ csize = out_offset;
+ compression_method = REC_COMPRESS_NONE;
+ }
+ memcpy(p->tmp_buf + sizeof(zint), &ref_count, sizeof(ref_count));
+ memcpy(p->tmp_buf + sizeof(zint)+sizeof(short),
+ &compression_method, sizeof(compression_method));
+
+ /* -------- compression */
+ if (rec_write_tmp_buf(p, csize + sizeof(short) + sizeof(char), sysnos)
+ != ZEBRA_OK)
+ ret = ZEBRA_FAIL;
+ }
+ return ret;
+}
+
static ZEBRA_RES 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;
}
*sysnop = -1;
- if (ref_count)
- {
- unsigned 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(zint)+sizeof(short)+
- sizeof(char),
- &csize, out_buf, out_offset, 1, 0, 30);
- if (i != BZ_OK)
- {
- yaz_log(YLOG_WARN, "bzBuffToBuffCompress error code=%d", i);
- csize = 0;
- }
- yaz_log(YLOG_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(zint) + sizeof(short) + sizeof(char),
- out_buf, out_offset);
- csize = out_offset;
- compression_method = REC_COMPRESS_NONE;
- }
- memcpy(p->tmp_buf + sizeof(zint), &ref_count, sizeof(ref_count));
- memcpy(p->tmp_buf + sizeof(zint)+sizeof(short),
- &compression_method, sizeof(compression_method));
-
- /* -------- compression */
- if (rec_write_tmp_buf(p, csize + sizeof(short) + sizeof(char), sysnos)
- != ZEBRA_OK)
- ret = ZEBRA_FAIL;
- }
+ rec_flush_shared(p, ref_count, sysnos, out_buf, out_offset);
xfree(out_buf);
xfree(sysnos);
return ret;
char *nptr, *cptr;
char *in_buf = 0;
char *bz_buf = 0;
-#if HAVE_BZLIB_H
- unsigned int bz_size;
-#endif
char compression_method;
assert(sysno > 0);
in_size = entry.size - sizeof(short) - sizeof(char);
switch (compression_method)
{
+ case REC_COMPRESS_ZLIB:
+#if HAVE_ZLIB_H
+ if (1)
+ {
+ unsigned int bz_size = entry.size * 20 + 100;
+ while (1)
+ {
+ uLongf destLen = bz_size;
+ bz_buf = (char *) xmalloc(bz_size);
+ i = uncompress((Bytef *) bz_buf, &destLen,
+ (const Bytef *) in_buf, in_size);
+ if (i == Z_OK)
+ {
+ bz_size = destLen;
+ break;
+ }
+ yaz_log(YLOG_LOG, "failed");
+ xfree(bz_buf);
+ bz_size *= 2;
+ }
+ in_buf = bz_buf;
+ in_size = bz_size;
+ }
+#else
+ yaz_log(YLOG_FATAL, "cannot decompress record(s) in ZLIB format");
+ return 0;
+#endif
+ break;
case REC_COMPRESS_BZIP2:
#if HAVE_BZLIB_H
- bz_size = entry.size * 20 + 100;
- while (1)
- {
- bz_buf = (char *) xmalloc(bz_size);
+ if (1)
+ {
+ unsigned int bz_size = entry.size * 20 + 100;
+ while (1)
+ {
+ bz_buf = (char *) xmalloc(bz_size);
#ifdef BZ_CONFIG_ERROR
- i = BZ2_bzBuffToBuffDecompress
+ i = BZ2_bzBuffToBuffDecompress
#else
- i = bzBuffToBuffDecompress
+ i = bzBuffToBuffDecompress
#endif
- (bz_buf, &bz_size, in_buf, in_size, 0, 0);
- yaz_log(YLOG_LOG, "decompress %5d %5d", in_size, bz_size);
- if (i == BZ_OK)
- break;
- yaz_log(YLOG_LOG, "failed");
- xfree(bz_buf);
- bz_size *= 2;
- }
- in_buf = bz_buf;
- in_size = bz_size;
+ (bz_buf, &bz_size, in_buf, in_size, 0, 0);
+ if (i == BZ_OK)
+ break;
+ yaz_log(YLOG_LOG, "failed");
+ xfree(bz_buf);
+ bz_size *= 2;
+ }
+ in_buf = bz_buf;
+ in_size = bz_size;
+ }
#else
yaz_log(YLOG_FATAL, "cannot decompress record(s) in BZIP2 format");
return 0;
return rec_get(p, rec_sysno_to_ext(1));
}
+Record rec_get_next(Records p, Record rec)
+{
+ Record next = 0;
+ zint next_sysno_int = rec_sysno_to_int(rec->sysno);
+
+ while (!next)
+ {
+ ++next_sysno_int;
+ if (next_sysno_int == p->head.index_last)
+ break;
+ next = rec_get(p, rec_sysno_to_ext(next_sysno_int));
+ }
+ return next;
+}
+
static Record rec_new_int(Records p)
{
int i;
/*
* Local variables:
* c-basic-offset: 4
+ * c-file-style: "Stroustrup"
* indent-tabs-mode: nil
* End:
* vim: shiftwidth=4 tabstop=8 expandtab
projects / idzebra-moved-to-github.git / blobdiff