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#include <algorithm>
#include "MessagesDecoder.h"
void MessagesDecoder::CmdmapRegisterCommand(string &command, uint16_t value)
{
cmdmap[value] = command;
if (command.rfind("STRVAR_", 0) == 0)
strvar_codes.insert(value);
}
void MessagesDecoder::CharmapRegisterCharacter(string &code, uint16_t value)
{
charmap[value] = code;
}
static string ConvertIntToHexStringN(unsigned value, StrConvMode mode, int n) {
string dest;
bool printing_zeroes = mode == STR_CONV_MODE_LEADING_ZEROS;
unsigned shift = 4 * (n - 1);
for (int i = 0; i < n; i++) {
unsigned nybble = (value >> shift) & 0xF;
if (nybble == 0 && !printing_zeroes) {
if (i == n - 1) printing_zeroes = true;
else if (mode == STR_CONV_MODE_RIGHT_ALIGN) {
dest += ' ';
continue;
}
}
if (nybble != 0 || printing_zeroes) {
if (nybble < 10) {
dest += (char)('0' + nybble);
} else {
dest += (char)('A' + nybble - 10);
}
}
shift -= 4;
}
return dest;
}
void MessagesDecoder::ReadMessagesFromBin(string& filename)
{
ifstream infile(filename, ios_base::binary);
if (!infile.good()) {
throw ifstream::failure("Unable to open file \"" + filename + "\" for reading");
}
infile.read((char*)&header, sizeof(header));
debug_printf("%d lines\n", header.count);
alloc_table.resize(header.count);
infile.read((char*)alloc_table.data(), (streamsize)(sizeof(MsgAlloc) * header.count));
int i = 1;
for (auto & alloc : alloc_table) {
alloc.decrypt(header.key, i);
u16string str;
str.resize(alloc.length);
infile.read((char*)str.data(), (2 * alloc.length));
DecryptU16String(str, i);
vec_encoded.push_back(str);
i++;
}
infile.close();
}
u16string MessagesDecoder::DecodeTrainerNameMessage(u16string const &message)
{
int bit = 0;
u16string out = u"\uf100";
auto src_p = message.cbegin() + 1;
char16_t cur_char;
do {
cur_char = ((*src_p >> bit) & 0x1FF);
bit += 9;
if (bit >= 15) {
src_p++;
bit -= 15;
if (bit != 0 && src_p < message.cend()) {
cur_char |= (*src_p << (9 - bit)) & 0x1FF;
}
}
out += cur_char;
} while (src_p < message.cend() && cur_char != 0x1FF);
return out;
}
string MessagesDecoder::DecodeMessage(u16string &message, int &i) {
string decoded;
bool is_trname = false;
for (size_t j = 0; j < message.size(); j++) {
uint16_t code = message[j];
debug_printf("%04X ", code);
if (charmap.find(code) != charmap.end()) {
decoded += charmap[code];
}
else if (code == (is_trname ? 0x01FF : 0xFFFF)) {
break;
}
else if (code == 0xFFFE) {
decoded += '{';
j++;
code = message[j++];
debug_printf("%04X ", code);
string command;
bool is_strvar = false;
if (find(strvar_codes.cbegin(), strvar_codes.cend(), code & 0xFF00) != strvar_codes.cend()) {
is_strvar = true;
command = "STRVAR_" + ConvertIntToHexStringN((code >> 8), STR_CONV_MODE_LEFT_ALIGN, 2);
}
else if (cmdmap.find(code) != cmdmap.end()) {
command = cmdmap[code];
} else {
throw runtime_error("Invalid control code in " + binfilename + ": " + ConvertIntToHexStringN(code, STR_CONV_MODE_LEADING_ZEROS, 4) + " at line " + to_string(i) + ":" + to_string(j));
}
decoded += command;
int nargs = message[j++];
debug_printf("%04X ", nargs);
if (is_strvar) {
decoded += ' ';
decoded += to_string(code & 0xFF);
if (nargs != 0)
decoded += ',';
}
for (int k = 0; k < nargs; k++) {
decoded += ' ';
decoded += to_string(message[j + k]);
debug_printf("%04X ", message[j + k]);
if (k != nargs - 1)
decoded += ',';
}
decoded += '}';
j += nargs - 1;
}
else if (code == 0xF100) {
decoded += "{TRNAME}";
message = DecodeTrainerNameMessage(message);
is_trname = true;
}
else {
throw runtime_error("invalid character in " + binfilename + ": " + ConvertIntToHexStringN(code, STR_CONV_MODE_LEADING_ZEROS, 4) + " at " + to_string(i) + ":" + to_string(j));
}
}
MsgAlloc & alloc = alloc_table[i];
debug_printf("msg %d: at 0x%08X, count %d\n", i + 1, alloc.offset, alloc.length);
return decoded;
}
template <typename T> void MessagesDecoder::WriteBinaryFile(string& filename, T& data) {
ofstream outfile(filename, ios_base::binary);
if (!outfile.good()) {
throw ofstream::failure("Unable to open file \"" + filename + "\" for writing");
}
outfile.write((const char *)&data, sizeof(data));
outfile.close();
}
void MessagesDecoder::WriteMessagesToText(string& filename) {
stringstream ss;
for (string& text : vec_decoded) {
ss << text << "\r\n";
}
WriteTextFile(filename, ss.str());
}
// Public virtual functions
void MessagesDecoder::ReadInput()
{
ReadMessagesFromBin(binfilename);
}
void MessagesDecoder::Convert()
{
for (int i = 0; i < (int)vec_encoded.size(); i++) {
u16string message = vec_encoded[i];
string decoded = DecodeMessage(message, i);
vec_decoded.push_back(decoded);
}
}
void MessagesDecoder::WriteOutput()
{
WriteMessagesToText(textfilename);
}
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