| ␍␊ |
| void WriteStr(const char * str)␍␊ |
| {␍␊ |
| ␉// A simple wrapper to output text using WriteFile␍␊ |
| ␉HANDLE stdout2 = GetStdHandle(STD_OUTPUT_HANDLE);␍␊ |
| ␉DWORD byteswritten;␍␊ |
| ␉int length = 0;␍␊ |
| ␉const char * cpyptr = str;␍␊ |
| ␉while(*cpyptr != 0)␍␊ |
| ␉{␍␊ |
| ␉␉cpyptr++;␍␊ |
| ␉␉length += 1;␍␊ |
| ␉}␍␊ |
| ␉WriteFile(stdout2, str, sizeof(str), &byteswritten, NULL);␍␊ |
| ␉while(*cpyptr++)␍␊ |
| ␉␉length++;␍␊ |
| ␉WriteFile(stdout2, str, length, &byteswritten, NULL);␍␊ |
| }␍␊ |
| ␍␊ |
| class FileWrapper␍␊ |
| {␍␊ |
| private:␍␊ |
| ␉HANDLE _handle;␍␊ |
| ␍␊ |
| public:␍␊ |
| ␉FileWrapper(const char * file, DWORD access, DWORD creation) { this->_handle = CreateFileA(file, access, 0, NULL, creation, FILE_ATTRIBUTE_NORMAL, NULL); }␍␊ |
| ␉~FileWrapper() { CloseHandle(this->_handle); }␍␊ |
| ␉HANDLE getHandle() { return this->_handle; }␍␊ |
| };␍␊ |
| ␍␊ |
| int main(int argc, char * args[])␍␊ |
| {␍␊ |
| ␉WriteStr("abc");␍␊ |
| ␉if (argc != 2)␍␊ |
| ␉// Parameter checking␍␊ |
| ␉if (argc != 3)␍␊ |
| ␉{␍␊ |
| ␉␉WriteStr("Please enter two parameters - cp src dst");␍␊ |
| ␉␉return 0;␍␊ |
| ␉}␍␊ |
| ␉␍␊ |
| ␉HANDLE hsrc = CreateFileA(args[1], GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);␍␊ |
| ␉// Open the source␍␊ |
| ␉// A little RAII␍␊ |
| ␉FileWrapper src(args[1], GENERIC_READ, OPEN_EXISTING);␍␊ |
| ␉if (GetLastError() == ERROR_FILE_NOT_FOUND)␍␊ |
| ␉{␍␊ |
| ␉␉WriteStr("Could not find file!");␍␊ |
| ␉␉return 0;␍␊ |
| ␉}␍␊ |
| ␍␊ |
| ␉// Open destination file␍␊ |
| ␉FileWrapper dst(args[2], GENERIC_WRITE, CREATE_ALWAYS);␍␊ |
| ␉␍␊ |
| ␉DWORD numberofbytesread;␍␊ |
| ␉DWORD numberofbyteswritten;␍␊ |
| ␉char buffer[20];␍␊ |
| ␍␊ |
| ␉// Stream the file instead of reading it into memory␍␊ |
| ␉while(true)␍␊ |
| ␉{␍␊ |
| ␉␉// The buffer parameter is a void pointer which means it can take anything - in this case we just use a char array␍␊ |
| ␉␉ReadFile(src.getHandle(), buffer, 20, &numberofbytesread, NULL);␍␊ |
| ␉␉if (numberofbytesread == 0)␍␊ |
| ␉␉␉break;␍␊ |
| ␉␉WriteFile(dst.getHandle(), buffer, numberofbytesread, &numberofbyteswritten, NULL);␍␊ |
| ␉}␍␊ |
| ␉␍␊ |
| ␉return 0;␍␊ |
| } |
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