the begginning

primitives/linux-port/print_dictblock.cpp

@@ -0,0 +1,104 @@
+/* Copyright (C) 2014 InfiniDB, Inc.
+
+   This program 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; version 2 of
+   the License.
+
+   This program 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 this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+   MA 02110-1301, USA. */
+
+/*****************************************************************************
+ * $Id$
+ *
+ ****************************************************************************/
+
+/** @file
+ * Brief description of the file contents
+ *
+ * More detailed description
+ */
+
+#include <iostream>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include "calpontsystemcatalog.h"
+
+using namespace std;
+
+void usage(char *name)
+{
+	cerr << "Usage: " << name << " dict_block_filename" << endl;
+	exit(0);
+}
+
+void parseDictBlock(char *block) 
+{
+
+	uint16_t *offsets;
+	uint16_t *freeBytes;
+	u_int64_t *contPtr;
+	int offsetIndex, size;
+	char sig[BLOCK_SIZE+1];
+
+	freeBytes = reinterpret_cast<uint16_t *>(&block[0]);
+	contPtr = reinterpret_cast<u_int64_t *>(&block[2]);
+	offsets = reinterpret_cast<uint16_t *>(&block[10]);
+
+	cout << "Free Bytes: " << *freeBytes << endl;
+	cout << "Continuation Pointer: 0x" << hex << *contPtr << dec << endl;
+	
+	for (offsetIndex = 0; offsets[offsetIndex+1] != 0xffff; offsetIndex++) {
+		size = offsets[offsetIndex] - offsets[offsetIndex+1];
+		memcpy(sig, &block[offsets[offsetIndex+1]], size);
+		sig[size] = '\0';
+		cout << "Offset #" << offsetIndex + 1 << ": size=" << size << " offset=" 
+			<< offsets[offsetIndex+1] << endl;
+
+// Use these lines instead for non-ascii data.
+// 		cout << "   Signature: 0x";
+// 		for (i = 0; i < size; i++)
+// 			cout << hex << (((int) sig[i]) & 0xff);
+		cout << "   Signature: " << sig;
+		cout << dec << endl;
+	}
+}
+
+int main(int argc, char **argv)
+{
+	int fd, err;
+	char buf[BLOCK_SIZE];
+
+	if (argc != 2)
+		usage(argv[0]);
+
+	fd = open(argv[1], O_RDONLY);
+	if (fd < 0) {
+		perror("open");
+		exit(1);
+	}
+	err = read(fd, buf, BLOCK_SIZE);
+	if (err < 0) {
+		perror("read");
+		exit(1);
+	}
+	if (err != BLOCK_SIZE) {
+		cerr << "Failed to read the file in one op, check the filelength and try again." 
+			<< endl;
+		exit(1);
+	}
+	
+	parseDictBlock(buf);
+	exit(0);
+}
+