void LoadPuz(Puzzle * puz, const std::string & filename, void * /* dummy */)
{
std::ifstream stream(filename.c_str(), std::ios::in | std::ios::binary);
if (stream.fail())
throw FileError(filename);
istream_wrapper f(stream);
const unsigned short c_primary = f.ReadShort();
if (strcmp(f.ReadString(12).c_str(), "ACROSS&DOWN") != 0)
throw FileTypeError("puz");
const unsigned short c_cib = f.ReadShort();
unsigned char c_masked[8];
f.ReadCharArray(c_masked, 8);
// Version is "[major].[minor]\0"
// We can read puzzles of 1.[anything]
std::string versionstr = f.ReadString(4);
if (versionstr[0] != '1' || ! isdigit(versionstr[2]))
throw LoadError("Unknown puz version.");
const unsigned short version = 10 + versionstr[2] - 0x30;
f.Skip(2); // 1 unknown short
const unsigned short c_grid = f.ReadShort();
f.Skip(2 * 6); // 6 noise shorts
const unsigned char width = f.ReadChar();
const unsigned char height = f.ReadChar();
const unsigned short num_clues = f.ReadShort();
const unsigned short grid_type = f.ReadShort();
const unsigned short grid_flag = f.ReadShort();
puz->GetGrid().SetCksum(c_grid);
puz->GetGrid().SetType(grid_type);
puz->GetGrid().SetFlag(grid_flag);
puz->GetGrid().SetSize(width, height);
// Read user text and solution
std::string solution = f.ReadString(width * height);
std::string text = f.ReadString(width * height);
// Set the grid's solution and text
std::string::iterator sol_it = solution.begin();
std::string::iterator text_it = text.begin();
for (Square * square = puz->GetGrid().First();
square != NULL;
square = square->Next())
{
// Solution
if (*sol_it == '.' || *sol_it == ':' && puz->IsDiagramless())
square->SetSolution(puz::Square::Black);
else if (*sol_it == '-')
square->SetSolution(puz::Square::Blank);
else
square->SetSolution(decode_puz(std::string(1, *sol_it)));
++sol_it;
// Text
if (square->IsBlack() && ! puz->IsDiagramless())
square->SetText(puz::Square::Black);
else if (*text_it == '-' || *text_it == 0)
square->SetText(puz::Square::Blank);
else if (puz->IsDiagramless() && (*text_it == '.' || *text_it == ':'))
{
// Black squares in a diagramless puzzle.
if (*text_it == '.')
square->SetText(puz::Square::Black);
else if (*text_it == ':')
square->SetText(puz::Square::Blank);
}
else
{
square->SetText(decode_puz(std::string(1, *text_it)));
if (islower(*text_it))
square->AddFlag(FLAG_PENCIL);
}
++text_it;
}
assert(sol_it == solution.end() && text_it == text.end());
puz->NumberGrid();
// General puzzle info
puz->SetTitle(decode_puz(f.ReadString()));
puz->SetAuthor(decode_puz(f.ReadString()));
puz->SetCopyright(decode_puz(f.ReadString()));
// Clues
std::vector<string_t> clues;
clues.reserve(num_clues);
// Save unaltered clues for the checksums
std::vector<std::string> cksum_clues;
cksum_clues.reserve(num_clues);
for (size_t i = 0; i < num_clues; ++i)
{
cksum_clues.push_back(f.ReadString());
clues.push_back(escape_xml(decode_puz(cksum_clues.back())));
}
puz->SetAllClues(clues);
// Notes
std::string notes = f.ReadString();
puz->SetNotes(escape_xml(decode_puz(notes)));
puz->SetOk(true);
// Try to load the extra sections (i.e. GEXT, LTIM, etc).
try {
LoadSections(puz, f);
}
catch (std::ios::failure &) {
// EOF here doesn't matter.
}
// Don't even bother with the checksums, since we check the validity
// of the puzzle anyways
}
bool
Scrambler::ScrambleSolution(unsigned short key_int)
{
bool ok = m_grid.GetWidth() > 0 && m_grid.GetHeight() > 0;
ok = ok && (m_grid.m_flag & FLAG_NO_SOLUTION) == 0;
assert(m_grid.First() != NULL);
if (! ok)
return false;
if (key_int == 0)
key_int = MakeKey();
assert(1000 <= key_int && key_int <= 9999);
// Read the key into an array of single digits
unsigned char key[4];
key[0] = int(key_int / 1000) % 10;
key[1] = int(key_int / 100) % 10;
key[2] = int(key_int / 10) % 10;
key[3] = int(key_int / 1) % 10;
std::string solution = GetSolutionDown();
unsigned short cksum = Checksummer::cksum_region(solution, 0);
if (cksum == 0)
return false;
size_t length = solution.length();
// Don't scramble really small puzzles
if(length < 12)
return 0;
// Do the scrambling
for (int i = 0; i < 4; ++i)
{
std::string scramble_part;
for (size_t j = 0; j < length; ++j)
{
char letter = solution[j] + key[j % 4];
// Make sure the letter is capital
if (letter > 90)
letter -= 26;
// Range for capital letters
assert(isupper(letter));
scramble_part.push_back(letter);
}
assert(scramble_part.length() == length);
scramble_part = ShiftString(scramble_part, key[i]);
assert(scramble_part.length() == length);
scramble_part = ScrambleString(scramble_part);
assert(scramble_part.length() == length);
solution = scramble_part;
}
// Save the scrambled solution to the puzzle file
std::string::iterator it = solution.begin();
for (Square * square = m_grid.First();
square != NULL;
square = square->Next(DOWN))
{
if (square->IsBlack())
continue;
// Make sure we preserve any rebus in the solution
if (! square->HasSolutionRebus())
square->SetSolution(decode_puz(std::string(1, *it)));
else
square->SetPlainSolution(*it);
++it;
}
assert(it == solution.end());
m_grid.m_flag |= FLAG_SCRAMBLED;
m_grid.m_cksum = cksum;
m_grid.m_key = key_int;
return true;
}