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/*
* Copyright (c) 2016, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Intel Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "data_corpus.h"
#include "util/container.h"
#include "ue2common.h"
#include <cassert>
#include <map>
#include <sstream>
#include <string>
#include <vector>
#include <sqlite3.h>
using namespace std;
using namespace ue2;
static
void readRow(sqlite3_stmt *statement, vector<DataBlock> &blocks,
map<unsigned int, unsigned int> &stream_indices) {
unsigned int id = sqlite3_column_int(statement, 0);
unsigned int stream_id = sqlite3_column_int(statement, 1);
const char *blob = (const char *)sqlite3_column_blob(statement, 2);
unsigned int bytes = sqlite3_column_bytes(statement, 2);
if (!contains(stream_indices, stream_id)) {
unsigned int internal_stream_index = stream_indices.size();
stream_indices[stream_id] = internal_stream_index;
}
auto internal_stream_index = stream_indices[stream_id];
if (!(blob && bytes > 0)) {
assert(0);
throw std::domain_error("Invalid blob or bytes from sqlite3.");
}
blocks.emplace_back(id, stream_id, internal_stream_index,
string(blob, blob + bytes));
}
vector<DataBlock> readCorpus(const string &filename) {
int status;
sqlite3 *db = nullptr;
status = sqlite3_open_v2(filename.c_str(), &db, SQLITE_OPEN_READONLY,
nullptr);
assert(db);
if (status != SQLITE_OK) {
ostringstream err;
err << "Unable to open database '" << filename << "': "
<< sqlite3_errmsg(db);
status = sqlite3_close(db);
assert(status == SQLITE_OK);
throw DataCorpusError(err.str());
}
static const string query("SELECT id, stream_id, data "
"FROM chunk ORDER BY id;");
sqlite3_stmt *statement = nullptr;
status = sqlite3_prepare_v2(db, query.c_str(), query.size(), &statement,
nullptr);
if (status != SQLITE_OK) {
status = sqlite3_finalize(statement);
assert(status == SQLITE_OK);
status = sqlite3_close(db);
assert(status == SQLITE_OK);
ostringstream oss;
oss << "Query failed: " << query;
throw DataCorpusError(oss.str());
}
vector<DataBlock> blocks;
map<unsigned int, unsigned int> stream_indices;
status = sqlite3_step(statement);
while (status == SQLITE_ROW) {
readRow(statement, blocks, stream_indices);
status = sqlite3_step(statement);
}
if (status != SQLITE_DONE) {
ostringstream oss;
oss << "Error retrieving blocks from corpus: "
<< sqlite3_errmsg(db);
status = sqlite3_finalize(statement);
assert(status == SQLITE_OK);
status = sqlite3_close(db);
assert(status == SQLITE_OK);
throw DataCorpusError(oss.str());
}
status = sqlite3_finalize(statement);
assert(status == SQLITE_OK);
status = sqlite3_close(db);
assert(status == SQLITE_OK);
if (blocks.empty()) {
throw DataCorpusError("Database contains no blocks.");
}
return blocks;
}
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