misc/mysql_splitter/splitter.cpp

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


#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 (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 getLastWord(string input) {
        input = remove_comments(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::erase_all(last, ";");
        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;
        }
        

        ifstream in( inputfile.c_str() );
        ofstream out;

        ostringstream header;

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

        while ( in.good() ) {
                in.getline(linebuf, BUFSIZE);

                string line(linebuf);


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

                        if (out.is_open() ) {
                                out.close();
                        }

                        boost::trim(line);
                        string dbname = getLastWord(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 );


                        if (!out.is_open() ) {
                                cout << "could not create outfile " << filename << endl;
                                return 3;
                        }

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

                }


                if (out.is_open() ) {
                        out << line << endl;
                } else {
                        header << line << endl; //collect preamble for later use
                }

        }


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


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