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#include "../source/utf8.h"
#include <iostream>
#include <fstream>
#include <string>
#include <vector>
using namespace std;
int main(int argc, char** argv)
{
if (argc != 2) {
cout << "\nUsage: docsample filename\n";
return 0;
}
const char* test_file_path = argv[1];
// Open the test file (must be UTF-8 encoded)
ifstream fs8(test_file_path);
if (!fs8.is_open()) {
cout << "Could not open " << test_file_path << endl;
return 0;
}
unsigned line_count = 1;
string line;
// Play with all the lines in the file
while (getline(fs8, line)) {
// check for invalid utf-8 (for a simple yes/no check, there is also utf8::is_valid function)
#if __cplusplus >= 201103L // C++ 11 or later
auto end_it = utf8::find_invalid(line.begin(), line.end());
#else
string::iterator end_it = utf8::find_invalid(line.begin(), line.end());
#endif // C++ 11
if (end_it != line.end()) {
cout << "Invalid UTF-8 encoding detected at line " << line_count << "\n";
cout << "This part is fine: " << string(line.begin(), end_it) << "\n";
}
// Get the line length (at least for the valid part)
ptrdiff_t length = utf8::distance(line.begin(), end_it);
cout << "Length of line " << line_count << " is " << length << "\n";
// Convert it to utf-16
#if __cplusplus >= 201103L // C++ 11 or later
u16string utf16line = utf8::utf8to16(line);
#else
vector<unsigned short> utf16line;
utf8::utf8to16(line.begin(), end_it, back_inserter(utf16line));
#endif // C++ 11
// And back to utf-8;
#if __cplusplus >= 201103L // C++ 11 or later
string utf8line = utf8::utf16to8(utf16line);
#else
string utf8line;
utf8::utf16to8(utf16line.begin(), utf16line.end(), back_inserter(utf8line));
#endif // C++ 11
// Confirm that the conversion went OK:
if (utf8line != string(line.begin(), end_it))
cout << "Error in UTF-16 conversion at line: " << line_count << "\n";
line_count++;
}
return 0;
}
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