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Diffstat (limited to 'ext/dba/libcdb/cdb_make.c')
-rw-r--r--ext/dba/libcdb/cdb_make.c244
1 files changed, 244 insertions, 0 deletions
diff --git a/ext/dba/libcdb/cdb_make.c b/ext/dba/libcdb/cdb_make.c
new file mode 100644
index 0000000..606b56e
--- /dev/null
+++ b/ext/dba/libcdb/cdb_make.c
@@ -0,0 +1,244 @@
+/*
+ +----------------------------------------------------------------------+
+ | PHP Version 5 |
+ +----------------------------------------------------------------------+
+ | Copyright (c) 1997-2013 The PHP Group |
+ +----------------------------------------------------------------------+
+ | This source file is subject to version 3.01 of the PHP license, |
+ | that is bundled with this package in the file LICENSE, and is |
+ | available through the world-wide-web at the following url: |
+ | http://www.php.net/license/3_01.txt |
+ | If you did not receive a copy of the PHP license and are unable to |
+ | obtain it through the world-wide-web, please send a note to |
+ | license@php.net so we can mail you a copy immediately. |
+ +----------------------------------------------------------------------+
+ | Author: Marcus Boerger <helly@php.net> |
+ +----------------------------------------------------------------------+
+ */
+
+/* $Id: 154118c15260d2e1f134cf7534ff244ba31b4353 $ */
+
+/* incorporated from D.J.Bernstein's cdb-0.75 (http://cr.yp.to/cdb.html)*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "php.h"
+
+#include <sys/types.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include "cdb.h"
+#include "cdb_make.h"
+#include "uint32.h"
+
+/* {{{ cdb_make_write */
+static int cdb_make_write(struct cdb_make *c, char *buf, uint32 sz TSRMLS_DC) {
+ return php_stream_write(c->fp, buf, sz) == sz ? 0 : -1;
+}
+
+/* {{{ cdb_posplus */
+static int cdb_posplus(struct cdb_make *c, uint32 len)
+{
+ uint32 newpos = c->pos + len;
+ if (newpos < len) {
+ errno = ENOMEM;
+ return -1;
+ }
+ c->pos = newpos;
+ return 0;
+}
+/* }}} */
+
+/* {{{ cdb_make_start */
+int cdb_make_start(struct cdb_make *c, php_stream * f TSRMLS_DC)
+{
+ c->head = 0;
+ c->split = 0;
+ c->hash = 0;
+ c->numentries = 0;
+ c->fp = f;
+ c->pos = sizeof(c->final);
+ if (php_stream_seek(f, c->pos, SEEK_SET) == -1) {
+ php_error_docref(NULL TSRMLS_CC, E_NOTICE, "Fseek failed");
+ return -1;
+ }
+ return php_stream_tell(c->fp);
+}
+/* }}} */
+
+/* {{{ cdb_make_addend */
+int cdb_make_addend(struct cdb_make *c, unsigned int keylen, unsigned int datalen, uint32 h TSRMLS_DC)
+{
+ struct cdb_hplist *head;
+
+ head = c->head;
+ if (!head || (head->num >= CDB_HPLIST)) {
+ head = (struct cdb_hplist *) emalloc(sizeof(struct cdb_hplist));
+ if (!head)
+ return -1;
+ head->num = 0;
+ head->next = c->head;
+ c->head = head;
+ }
+ head->hp[head->num].h = h;
+ head->hp[head->num].p = c->pos;
+ ++head->num;
+ ++c->numentries;
+ if (cdb_posplus(c,8) == -1)
+ return -1;
+ if (cdb_posplus(c, keylen) == -1)
+ return -1;
+ if (cdb_posplus(c, datalen) == -1)
+ return -1;
+ return 0;
+}
+/* }}} */
+
+/* {{{ cdb_make_addbegin */
+int cdb_make_addbegin(struct cdb_make *c, unsigned int keylen, unsigned int datalen TSRMLS_DC)
+{
+ char buf[8];
+
+ if (keylen > 0xffffffff) {
+ errno = ENOMEM;
+ return -1;
+ }
+ if (datalen > 0xffffffff) {
+ errno = ENOMEM;
+ return -1;
+ }
+
+ uint32_pack(buf, keylen);
+ uint32_pack(buf + 4, datalen);
+ if (cdb_make_write(c, buf, 8 TSRMLS_CC) != 0)
+ return -1;
+ return 0;
+}
+
+/* {{{ cdb_make_add */
+int cdb_make_add(struct cdb_make *c,char *key,unsigned int keylen,char *data,unsigned int datalen TSRMLS_DC)
+{
+ if (cdb_make_addbegin(c, keylen, datalen TSRMLS_CC) == -1)
+ return -1;
+ if (cdb_make_write(c, key, keylen TSRMLS_CC) != 0)
+ return -1;
+ if (cdb_make_write(c, data, datalen TSRMLS_CC) != 0)
+ return -1;
+ return cdb_make_addend(c, keylen, datalen, cdb_hash(key, keylen) TSRMLS_CC);
+}
+/* }}} */
+
+/* {{{ cdb_make_finish */
+int cdb_make_finish(struct cdb_make *c TSRMLS_DC)
+{
+ char buf[8];
+ int i;
+ uint32 len;
+ uint32 u;
+ uint32 memsize;
+ uint32 count;
+ uint32 where;
+ struct cdb_hplist *x;
+ struct cdb_hp *hp;
+
+ for (i = 0;i < 256;++i)
+ c->count[i] = 0;
+
+ for (x = c->head; x; x = x->next) {
+ i = x->num;
+ while (i--)
+ ++c->count[255 & x->hp[i].h];
+ }
+
+ memsize = 1;
+ for (i = 0;i < 256;++i) {
+ u = c->count[i] * 2;
+ if (u > memsize)
+ memsize = u;
+ }
+
+ memsize += c->numentries; /* no overflow possible up to now */
+ u = (uint32) 0 - (uint32) 1;
+ u /= sizeof(struct cdb_hp);
+ if (memsize > u) {
+ errno = ENOMEM;
+ return -1;
+ }
+
+ c->split = (struct cdb_hp *) safe_emalloc(memsize, sizeof(struct cdb_hp), 0);
+ if (!c->split)
+ return -1;
+
+ c->hash = c->split + c->numentries;
+
+ u = 0;
+ for (i = 0;i < 256;++i) {
+ u += c->count[i]; /* bounded by numentries, so no overflow */
+ c->start[i] = u;
+ }
+
+ for (x = c->head; x; x = x->next) {
+ i = x->num;
+ while (i--)
+ c->split[--c->start[255 & x->hp[i].h]] = x->hp[i];
+ }
+
+ for (i = 0;i < 256;++i) {
+ count = c->count[i];
+
+ len = count + count; /* no overflow possible */
+ uint32_pack(c->final + 8 * i,c->pos);
+ uint32_pack(c->final + 8 * i + 4,len);
+
+ for (u = 0;u < len;++u)
+ c->hash[u].h = c->hash[u].p = 0;
+
+ hp = c->split + c->start[i];
+ for (u = 0;u < count;++u) {
+ where = (hp->h >> 8) % len;
+ while (c->hash[where].p)
+ if (++where == len)
+ where = 0;
+ c->hash[where] = *hp++;
+ }
+
+ for (u = 0;u < len;++u) {
+ uint32_pack(buf, c->hash[u].h);
+ uint32_pack(buf + 4, c->hash[u].p);
+ if (cdb_make_write(c, buf, 8 TSRMLS_CC) != 0)
+ return -1;
+ if (cdb_posplus(c, 8) == -1)
+ return -1;
+ }
+ }
+
+ if (c->split)
+ efree(c->split);
+
+ for (x = c->head; x; c->head = x) {
+ x = x->next;
+ efree(c->head);
+ }
+
+ if (php_stream_flush(c->fp) != 0)
+ return -1;
+ php_stream_rewind(c->fp);
+ if (php_stream_tell(c->fp) != 0)
+ return -1;
+ if (cdb_make_write(c, c->final, sizeof(c->final) TSRMLS_CC) != 0)
+ return -1;
+ return php_stream_flush(c->fp);
+}
+/* }}} */
+
+/* {{{ cdb_make_version */
+char *cdb_make_version()
+{
+ return "0.75, $Id: 154118c15260d2e1f134cf7534ff244ba31b4353 $";
+}
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