Initial import

1 files changed, 121 insertions, 0 deletions

diff --git a/server/.svn/text-base/cdb_find.c.svn-base b/server/.svn/text-base/cdb_find.c.svn-base
new file mode 100644
index 0000000..2fc2bcf
--- /dev/null
+++ b/server/.svn/text-base/cdb_find.c.svn-base
@@ -0,0 +1,121 @@
+#include "cdbpriv.h"
+
+#include <errno.h>
+#include <stdio.h>
+#include <sys/types.h>
+
+#ifndef SEEK_SET
+#define SEEK_SET 0
+#endif
+
+RCSID("$Id: cdb_find.c,v 1.2 2000/02/29 19:31:33 shmit Exp $");
+
+static int
+cdb_bread(char **ptr, char *endptr, char *buf, unsigned int len)
+{
+	if ((*ptr)+len > endptr) {
+		errno = EIO;
+		return -1;
+	}
+
+	memcpy(buf, *ptr, len);
+	*ptr += len;
+	return 0;
+}
+
+static int
+match(char **ptr, char *endptr, const char *key, unsigned int len)
+{
+	char buf[32];
+	int n;
+	int i;
+
+	n = sizeof(buf);
+	if (n > len)
+		n = len;
+
+	while (len > 0) {
+		if (cdb_bread(ptr, endptr, buf, n) == -1)
+			return -1;
+
+		for (i = 0; i < n; ++i)
+			if (buf[i] != key[i])
+				return 0;
+		key += n;
+		len -= n;
+	}
+
+	return 1;
+}
+
+int
+cdb_find(char *buff, off_t bufflen, const char *key, int len,
+	 char **ret, uint32_t *retlen)
+{
+	char *cur, *end;
+	char packbuf[8];
+	uint32_t pos;
+	uint32_t h;
+	uint32_t lenhash;
+	uint32_t h2;
+	uint32_t loop;
+	uint32_t poskd;
+
+	cur = buff;
+	end = buff + bufflen;
+
+	h = cdb_hash(key, len);
+
+	pos = 8 * (h & 255);
+	cur += pos;
+	if (cur > end) {
+		errno = EIO;
+		return -1;
+	}
+
+	if (cdb_bread(&cur, end, packbuf, 8) == -1)
+		return -1;
+
+	pos = cdb_unpack(packbuf);
+	lenhash = cdb_unpack(packbuf + 4);
+
+	if (!lenhash) return 0;
+	h2 = (h >> 8) % lenhash;
+
+	for (loop = 0; loop < lenhash; ++loop) {
+		cur = buff + (pos + 8 * h2);
+		if (cur > end) {
+			errno = EIO;
+			return -1;
+		}
+		if (cdb_bread(&cur, end, packbuf, 8) == -1)
+			return -1;
+		poskd = cdb_unpack(packbuf + 4);
+		if (!poskd)
+			return 0;
+
+		if (cdb_unpack(packbuf) == h) {
+			cur = buff + poskd;
+			if (cur > end) {
+				errno = EIO;
+				return -1;
+			}
+			if (cdb_bread(&cur, end, packbuf, 8) == -1)
+				return -1;
+			if (cdb_unpack(packbuf) == len) {
+				switch(match(&cur, end, key, len)) {
+				case -1:
+					return -1;
+				case 1:
+					*retlen = cdb_unpack(&packbuf[4]);
+					*ret = cur;
+					return 1;
+				}
+			}
+		}
+		if (++h2 == lenhash)
+			h2 = 0;
+	}
+
+	return 0;
+}