104 lines
1.8 KiB
C++
104 lines
1.8 KiB
C++
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#include <iostream>
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#include <fstream>
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using namespace std;
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const size_t MAXLINE = 256;
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void init_key(char key[8])
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{
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for (size_t i = 0; i < 8; i++)
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key[i] = 'A' + ::rand() % 26;
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}
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bool encode_string(const char* linein, char lineout[MAXLINE])
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{
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memset(lineout, 0, MAXLINE);
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if (linein && *linein)
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{
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char key[8]; init_key(key);
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size_t i;
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for (i = 0; linein[i]; i++)
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lineout[i] = linein[i] + (i < 8 ? key[i] : linein[i - 8]);
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lineout[i] = '\0';
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}
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return *lineout >= ' ';
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}
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bool read_line(istream& txt, char line[MAXLINE])
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{
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memset(line, 0, MAXLINE);
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while (!txt.eof())
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{
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txt.getline(line, MAXLINE-1);
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if (line[0] == '/' && line[1] == '/')
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continue;
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for (size_t i = 0; line[i]; i++)
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{
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if (line[i] > ' ')
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return true;
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}
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}
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return false;
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}
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bool write_line(ostream& zip, const char* line)
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{
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bool ok = line && *line;
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if (ok)
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{
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while (*line && *line <= ' ')
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line++;
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ok = *line > ' ';
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if (ok)
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{
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char lineout[MAXLINE];
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encode_string(line, lineout);
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zip << lineout << endl;
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}
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}
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return ok;
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}
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/* May be useful at least once
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bool write_paragraph(ostream& zip, const char* line)
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{
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bool ok = line && *line;
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if (ok)
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zip << '[' << line << ']' << endl;
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return ok;
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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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if (argc <= 1)
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{
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cerr << "Missing input file (dninst.txt)" << endl;
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return 1;
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}
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if (argc <= 2)
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{
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cerr << "Missing output file (dninst.zip)" << endl;
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return 2;
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}
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cerr << "Encoding " << argv[1] << " ..." << endl;
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ifstream txt(argv[1]);
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ofstream zip(argv[2]);
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char line[MAXLINE];
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read_line(txt, line);
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::srand(883);
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write_line(zip, line);
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::srand(atoi(line));
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while (read_line(txt, line))
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write_line(zip, line);
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cerr << "Encoded " << argv[2] << endl;
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return 0;
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}
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