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#include <iostream> |
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#include <fstream> |
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#include <sstream> |
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#include <string> |
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#include <vector> |
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#include <boost/algorithm/string.hpp> |
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#include <boost/filesystem.hpp> |
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#include <boost/program_options.hpp> |
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namespace po = boost::program_options; |
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using namespace std; |
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const int BUFSIZE = 1024*1024; |
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string remove_comments(string in) { |
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bool isComment = false; |
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ostringstream out; |
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for (int i=0; i<in.length() -1; i++) { |
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if (in.at(i) == '/' && in.at(i+1) == '*') |
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isComment = true; |
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if (in.at(i) == '*' && in.at(i+1) == '/') { |
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i++; |
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isComment = false; |
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continue; |
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} |
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if (isComment == false) |
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out << in.at(i) ; |
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} |
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return out.str(); |
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} |
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string get_db_name(string input) { |
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input = remove_comments(input); |
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boost::erase_all(input,"`"); |
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boost::erase_all(input, ";"); |
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boost::trim(input); |
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vector<string> words; |
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words = boost::split(words, input, boost::is_any_of(" ") ); |
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string last = words.back(); |
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boost::trim(last); |
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return last; |
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} |
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int main(int argc, char** argv) { |
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po::options_description desc("Mysql dump file splitter:\nAllowed options"); |
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desc.add_options() |
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("help", "produce help message") |
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("data", "ignore ceate tablestatements") |
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("input-file", po::value< string >(), "input file") |
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; |
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po::positional_options_description p; |
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p.add("input-file", -1); |
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po::variables_map vm; |
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po::store( po::command_line_parser(argc, argv).options(desc).positional(p).run(), vm); |
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po::notify(vm); |
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if (vm.count("help")) { |
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cout << desc << "\n"; |
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return 1; |
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} |
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if ( vm.count("input-file") == 0) { |
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cout << desc << endl; |
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return 1; |
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} |
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char linebuf[BUFSIZE]; |
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string inputfile = vm["input-file"].as< string >(); |
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if (! boost::filesystem::exists(inputfile) ) { |
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cout << "No file named " << inputfile << endl; |
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return 1; |
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} |
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ifstream in( inputfile.c_str() ); |
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ofstream out; |
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ostringstream header; |
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if (!in.is_open() ) { |
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cout << "Could not open " << argv[1] << endl; |
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return 2; |
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}
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time_t start = time(NULL); |
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while ( in.good() ) { |
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in.getline(linebuf, BUFSIZE); |
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string line(linebuf); |
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//if (line.substr(0, 15) == "CREATE DATABASE" ) { |
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if ( boost::starts_with(line, "CREATE DATABASE") ) { |
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if (out.is_open() ) { |
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out.close(); |
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} |
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boost::trim(line); |
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string dbname = get_db_name(line); |
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cout << ">" << dbname << endl; |
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ostringstream oss; |
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oss << dbname << "_dump.sql";
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string filename = oss.str(); |
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bool did_exist = boost::filesystem::exists(filename); |
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out.open( filename.c_str(), ios::app ); |
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if (!out.is_open() ) { |
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cout << "could not create outfile " << filename << endl; |
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return 3; |
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} |
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if (!did_exist) { |
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out << header.str() << endl; //write preamble in new file |
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} |
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} |
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if (out.is_open() ) { |
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out << line << endl; |
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} else { |
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header << line << endl; //collect preamble for later use |
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} |
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} |
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if(out.is_open()) |
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out.close();
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time_t end = time(NULL);
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cout << "Elapsed " << (end-start) << " seconds" << endl; |
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in.close(); |
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} |