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105 lines
2.6 KiB
C++
105 lines
2.6 KiB
C++
/* Copyright (C) 2014 InfiniDB, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; version 2 of
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the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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/*****************************************************************************
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* $Id$
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*
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****************************************************************************/
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/** @file
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* Brief description of the file contents
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*
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* More detailed description
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*/
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#include <iostream>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "calpontsystemcatalog.h"
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using namespace std;
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void usage(char *name)
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{
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cerr << "Usage: " << name << " dict_block_filename" << endl;
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exit(0);
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}
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void parseDictBlock(char *block)
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{
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uint16_t *offsets;
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uint16_t *freeBytes;
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u_int64_t *contPtr;
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int offsetIndex, size;
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char sig[BLOCK_SIZE+1];
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freeBytes = reinterpret_cast<uint16_t *>(&block[0]);
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contPtr = reinterpret_cast<u_int64_t *>(&block[2]);
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offsets = reinterpret_cast<uint16_t *>(&block[10]);
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cout << "Free Bytes: " << *freeBytes << endl;
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cout << "Continuation Pointer: 0x" << hex << *contPtr << dec << endl;
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for (offsetIndex = 0; offsets[offsetIndex+1] != 0xffff; offsetIndex++) {
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size = offsets[offsetIndex] - offsets[offsetIndex+1];
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memcpy(sig, &block[offsets[offsetIndex+1]], size);
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sig[size] = '\0';
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cout << "Offset #" << offsetIndex + 1 << ": size=" << size << " offset="
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<< offsets[offsetIndex+1] << endl;
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// Use these lines instead for non-ascii data.
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// cout << " Signature: 0x";
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// for (i = 0; i < size; i++)
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// cout << hex << (((int) sig[i]) & 0xff);
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cout << " Signature: " << sig;
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cout << dec << endl;
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}
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}
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int main(int argc, char **argv)
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{
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int fd, err;
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char buf[BLOCK_SIZE];
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if (argc != 2)
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usage(argv[0]);
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fd = open(argv[1], O_RDONLY);
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if (fd < 0) {
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perror("open");
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exit(1);
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}
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err = read(fd, buf, BLOCK_SIZE);
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if (err < 0) {
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perror("read");
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exit(1);
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}
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if (err != BLOCK_SIZE) {
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cerr << "Failed to read the file in one op, check the filelength and try again."
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<< endl;
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exit(1);
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}
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parseDictBlock(buf);
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exit(0);
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}
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