misc/mysql_splitter/splitter.cpp

#include <iostream>
#include <sstream>
#include <string>
#include <vector>

#include <cstdio>

#include <boost/algorithm/string.hpp>
#include <boost/filesystem.hpp>
#include <boost/program_options.hpp>

namespace po = boost::program_options;

using namespace std;

const int BUFSIZE = 1024*1024;

string remove_comments(string in) {
        bool isComment = false;
        ostringstream out;
        for (unsigned int i=0; i<in.length() -1; i++) {
                if (in.at(i) == '/' && in.at(i+1) == '*')
                        isComment = true;

                if (in.at(i) == '*' && in.at(i+1) == '/') {
                        i++;
                        isComment = false;
                        continue;
                }

                if (isComment == false)
                        out << in.at(i) ;
        }

        return out.str();
}

string get_db_name(string input) {
        input = remove_comments(input);

        boost::erase_all(input,"`");
        boost::erase_all(input, ";");
        boost::trim(input);

        vector<string> words;
        words = boost::split(words, input, boost::is_any_of(" ") );

        string last = words.back();
        boost::trim(last);

        return last;
}


int main(int argc, char** argv) {

        po::options_description desc("Mysql dump file splitter:\nAllowed options");
        desc.add_options()
        ("help", "produce help message")
        ("data", "ignore ceate tablestatements")
                ("input-file", po::value< string >(), "input file")
        ;

        po::positional_options_description p;
        p.add("input-file", -1);


        po::variables_map vm;
        po::store( po::command_line_parser(argc, argv).options(desc).positional(p).run(), vm);
        po::notify(vm);

        if (vm.count("help")) {
        cout << desc << "\n";
        return 1;
        }


        if ( vm.count("input-file") == 0) {
                cout << desc << endl;
                return 1;
        }


        char linebuf[BUFSIZE];

        string inputfile = vm["input-file"].as< string >();
        if (! boost::filesystem::exists(inputfile) ) {
                cout << "No file named " << inputfile << endl;
                return 1;
        }


        FILE* in = fopen( inputfile.c_str(), "r" );
        FILE* out = NULL;
        //ifstream in( inputfile.c_str() );
        //ofstream out;

        ostringstream header;

        if ( in == NULL ) {
                cout << "Could not open " << argv[1] << endl;
                return 2;
        }

        time_t start = time(NULL);

        const char* SEARCH = "CREATE DATABASE";
        const int SEARCHLEN = strlen(SEARCH);

        while ( feof(in) == 0 && ferror(in) == 0 ) {
                fgets(linebuf, BUFSIZE, in);


                //if (line.substr(0, 15) == "CREATE DATABASE" ) {
                //if ( boost::starts_with(line, "CREATE DATABASE") ) {
                if (strncmp(linebuf,SEARCH, SEARCHLEN) == 0) {

            string line(linebuf);
                        
                        if (out != NULL ) {
                                fclose(out);
                        }

                        boost::trim(line);
                        string dbname = get_db_name(line);
                        cout << ">" << dbname << endl;


                        ostringstream oss;
                        oss << dbname << "_dump.sql";

            string filename = oss.str();

                        bool did_exist = boost::filesystem::exists(filename);

                        //out.open( filename.c_str(), ios::app );
                        out  = fopen64(filename.c_str(), "a");


                        if ( out == NULL ) {
                                cout << "could not create outfile " << filename << endl;
                                return 3;
                        }

                        if (!did_exist) {
                                fputs(header.str().c_str(), out);
                                //out << header.str() << endl; //write preamble in new file
                        }

                }


                if (out != NULL ) {
                        fputs(linebuf, out);
                        //fputs("\n", out);
                        //out << linebuf << endl;
                } else {
                        header << linebuf; //collect preamble for later use
                }

        }


        if (out != NULL)
                fclose(out); 

//      if (out.is_open())
//              out.close();

    time_t end = time(NULL);

    cout << "Elapsed " << (end-start) << " seconds" << endl;

        fclose(in);
}
1	torben	1231	#include <iostream>
2			#include <sstream>
3			#include <string>
4			#include <vector>
5
6	torben	1461	#include <cstdio>
7	torben	1282
8	torben	1231	#include <boost/algorithm/string.hpp>
9			#include <boost/filesystem.hpp>
10	torben	1282	#include <boost/program_options.hpp>
11	torben	1231
12	torben	1282	namespace po = boost::program_options;
13
14	torben	1231	using namespace std;
15
16			const int BUFSIZE = 1024*1024;
17
18	torben	1283	string remove_comments(string in) {
19			bool isComment = false;
20			ostringstream out;
21	torben	1460	for (unsigned int i=0; i<in.length() -1; i++) {
22	torben	1458	if (in.at(i) == '/' && in.at(i+1) == '*')
23	torben	1283	isComment = true;
24	torben	1458
25	torben	1283	if (in.at(i) == '*' && in.at(i+1) == '/') {
26			i++;
27			isComment = false;
28			continue;
29			}
30
31			if (isComment == false)
32			out << in.at(i) ;
33			}
34
35			return out.str();
36			}
37
38	torben	1284	string get_db_name(string input) {
39	torben	1283	input = remove_comments(input);
40
41			boost::erase_all(input,"`");
42	torben	1284	boost::erase_all(input, ";");
43	torben	1283	boost::trim(input);
44	torben	1284
45	torben	1231	vector<string> words;
46			words = boost::split(words, input, boost::is_any_of(" ") );
47
48			string last = words.back();
49			boost::trim(last);
50
51			return last;
52			}
53
54
55			int main(int argc, char** argv) {
56	torben	1282
57			po::options_description desc("Mysql dump file splitter:\nAllowed options");
58			desc.add_options()
59			("help", "produce help message")
60			("data", "ignore ceate tablestatements")
61			("input-file", po::value< string >(), "input file")
62			;
63
64			po::positional_options_description p;
65			p.add("input-file", -1);
66
67
68			po::variables_map vm;
69			po::store( po::command_line_parser(argc, argv).options(desc).positional(p).run(), vm);
70			po::notify(vm);
71
72			if (vm.count("help")) {
73			cout << desc << "\n";
74			return 1;
75			}
76
77
78
79			if ( vm.count("input-file") == 0) {
80			cout << desc << endl;
81	torben	1231	return 1;
82			}
83
84	torben	1282
85	torben	1231	char linebuf[BUFSIZE];
86
87	torben	1282	string inputfile = vm["input-file"].as< string >();
88			if (! boost::filesystem::exists(inputfile) ) {
89			cout << "No file named " << inputfile << endl;
90			return 1;
91			}
92
93	torben	1458
94	torben	1461	FILE* in = fopen( inputfile.c_str(), "r" );
95			FILE* out = NULL;
96			//ifstream in( inputfile.c_str() );
97			//ofstream out;
98	torben	1231
99			ostringstream header;
100
101	torben	1461	if ( in == NULL ) {
102	torben	1231	cout << "Could not open " << argv[1] << endl;
103			return 2;
104	torben	1458	}
105
106	torben	1459	time_t start = time(NULL);
107
108			const char* SEARCH = "CREATE DATABASE";
109			const int SEARCHLEN = strlen(SEARCH);
110	torben	1231
111	torben	1461	while ( feof(in) == 0 && ferror(in) == 0 ) {
112			fgets(linebuf, BUFSIZE, in);
113	torben	1231
114
115			//if (line.substr(0, 15) == "CREATE DATABASE" ) {
116	torben	1459	//if ( boost::starts_with(line, "CREATE DATABASE") ) {
117			if (strncmp(linebuf,SEARCH, SEARCHLEN) == 0) {
118	torben	1231
119	torben	1459	string line(linebuf);
120	torben	1461
121			if (out != NULL ) {
122			fclose(out);
123	torben	1231	}
124
125			boost::trim(line);
126	torben	1284	string dbname = get_db_name(line);
127	torben	1231	cout << ">" << dbname << endl;
128
129
130			ostringstream oss;
131			oss << dbname << "_dump.sql";
132
133			string filename = oss.str();
134
135			bool did_exist = boost::filesystem::exists(filename);
136
137	torben	1461	//out.open( filename.c_str(), ios::app );
138	torben	1463	out = fopen64(filename.c_str(), "a");
139	torben	1231
140
141
142	torben	1461	if ( out == NULL ) {
143	torben	1231	cout << "could not create outfile " << filename << endl;
144			return 3;
145			}
146
147			if (!did_exist) {
148	torben	1461	fputs(header.str().c_str(), out);
149			//out << header.str() << endl; //write preamble in new file
150	torben	1231	}
151
152			}
153
154
155	torben	1461	if (out != NULL ) {
156			fputs(linebuf, out);
157	torben	1462	//fputs("\n", out);
158	torben	1461	//out << linebuf << endl;
159	torben	1231	} else {
160	torben	1462	header << linebuf; //collect preamble for later use
161	torben	1231	}
162
163			}
164
165
166	torben	1461	if (out != NULL)
167			fclose(out);
168
169			// if (out.is_open())
170			// out.close();
171	torben	1458
172			time_t end = time(NULL);
173
174			cout << "Elapsed " << (end-start) << " seconds" << endl;
175	torben	1231
176	torben	1461	fclose(in);
177	torben	1231	}