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#include <iostream>
#include <fstream>
#include <vector>
#include <string>
#include <cstring>
#include <sstream>
#include <map>
#include <set>
using namespace std;
struct Options
{
fstream outfile;
map<string, string> infiles;
unsigned char padval;
bool keep_names;
string host_root;
string nitro_root;
Options(int const & argc, char ** const & argv) :
// Default values
padval(255),
keep_names(false)
{
char last_opt = 0;
string outfname; // Use this to avoid clobbering an existing file in the event of an error
for (string arg : vector<char *>(argv + 1, argv + argc))
{
if (last_opt != 0) {
switch (last_opt)
{
case 'p':
{
// Padding
unsigned long x;
stringstream is(arg);
is >> x;
if (x >= 256) {
stringstream ss;
ss << "Invalid value for -p: " << x << endl;
throw invalid_argument(ss.str());
}
padval = x;
break;
}
case 'o':
// Outfile
if (!outfname.empty()) {
throw invalid_argument("Can't output more than one file\n");
}
outfname = arg;
break;
case 'r':
// Not fully implemented
if (!host_root.empty()) {
throw invalid_argument("Duplicate settings for option -r\n");
}
host_root = arg;
break;
case 'R':
// Not fully implemented
if (!nitro_root.empty()) {
throw invalid_argument("Duplicate settings for option -R\n");
}
nitro_root = arg;
break;
default:
stringstream ss;
ss << "Unrecognized option: -" << (char)last_opt << endl;
throw invalid_argument(ss.str());
}
last_opt = 0;
}
else if (arg[0] == '-') {
if (arg[1] == 0 || arg[2] != 0) {
stringstream ss;
ss << "Unrecognized option: " << arg << endl;
throw invalid_argument(ss.str());
}
switch (arg[1]) {
case 'h':
cout << "Usage: " << argv[0] << " [-p PADVAL] [-h] -o OUTFILE FILE [FILE ...]" << endl;
cout << endl;
cout << " FILE [FILE ...] List of files to be packed into the archive." << endl;
cout << " -o OUTFILE The destination archive, in NARC format" << endl;
cout << " -p PADVAL Pad archive members to word with this character. Default: 255" << endl;
cout << " -h Print this message and exit" << endl;
exit(0);
case 'k':
throw invalid_argument("'-k': not implemented\n");
// if (keep_names) {
// throw invalid_argument("'-k' specified more than once\n");
// }
// keep_names = true;
// break;
default:
last_opt = arg[1];
}
}
else
{
fstream file;
stringstream uss;
if (!infiles[arg].empty()) {
stringstream ss;
ss << "Duplicate file: " << arg << endl;
throw invalid_argument(ss.str());
}
file.open(arg, ios_base::in | ios_base::binary);
uss << file.rdbuf();
file.close();
infiles[arg] = uss.str();
}
}
if (outfname.empty()) {
throw invalid_argument("Must specify an output file (-o OUTFILE)\n");
}
if (infiles.empty()) {
throw invalid_argument("No input files\n");
}
outfile.open(outfname, ios_base::binary | ios_base::out);
}
};
struct FatbEntry
{
uint32_t start;
uint32_t end;
};
struct FatbHeader
{
char magic[4];
uint32_t chunk_size;
uint16_t file_count;
char padding[2];
FatbHeader(uint16_t numfiles) :
chunk_size(sizeof(FatbHeader) + sizeof(FatbEntry) * numfiles),
file_count(numfiles)
{ strncpy(magic, "BTAF", 4); memset(padding, 0, 2); }
};
struct FntbDirHeader
{
uint32_t offset;
uint16_t first_file;
uint16_t id_or_count;
};
struct FntbHeader
{
char magic[4];
uint32_t chunk_size;
FntbHeader() :
chunk_size(sizeof(FntbHeader) + sizeof(FntbDirHeader))
{ strncpy(magic, "BTNF", 4); }
string set_names(Options*& opt, FntbDirHeader*& dirHeader) {
throw runtime_error("not implemented\n");
// typedef struct NitroFS {
// bool is_dir;
// vector<struct NitroFS> children;
// } nitrofs_t;
// map<string, nitrofs_t> fs;
// fs[opt->nitro_root].is_dir = true;
// string host_root;
// for (auto pair : opt->infiles) {
// string fname = pair.first;
// fname = fname.replace(0, opt->host_root.size(), opt->nitro_root);
// int pos;
// while ((pos = fname.find("//")) != fname.npos) {
// fname = fname.replace(pos, 2, 1, '/');
// }
// }
// return nullptr;
}
};
#define FNT_END 0
#define FNT_LENGTH_MASK 0x7F
#define FNT_IS_DIR_MASK 0x80
struct FimgHeader
{
char magic[4];
uint32_t chunk_size;
FimgHeader(size_t image_size) :
chunk_size(sizeof(FimgHeader) + image_size)
{ strncpy(magic, "GMIF", 4); }
};
struct NarcHeader
{
char magic[4]; // NARC
uint16_t bom;
uint16_t version;
uint32_t size;
uint16_t chunk_size;
uint16_t num_chunks;
NarcHeader(uint16_t numfiles, size_t image_size) :
bom(0xFFFE),
version(0x0100),
size(sizeof(NarcHeader) + sizeof(FatbHeader) + sizeof(FatbEntry) * numfiles + sizeof(FntbHeader) + sizeof(FntbDirHeader) + sizeof(FimgHeader) + image_size),
chunk_size(sizeof(NarcHeader)),
num_chunks(3)
{ strncpy(magic, "NARC", 4); }
};
int main(int argc, char ** argv)
{
try
{
auto opt = new Options(argc, argv);
size_t nfiles = opt->infiles.size();
auto fatb = new FatbEntry[nfiles];
FatbEntry *entry = fatb;
for (auto pair : opt->infiles)
{
entry->start = (entry == fatb ? 0 : (entry[-1].end + 3) & ~3);
entry->end = entry->start + pair.second.size();
entry++;
}
size_t image_size = (fatb[nfiles - 1].end + 3) & ~3;
FntbHeader fntbHeader;
auto fntbDir = new FntbDirHeader;
*fntbDir = (FntbDirHeader) {4, 0, 1}; // dummy
stringstream fnt;
if (opt->keep_names)
{
fntbHeader.set_names(opt, fntbDir);
}
NarcHeader narcHeader(nfiles, (fatb[nfiles - 1].end + 3) & ~3);
FatbHeader fatbHeader(nfiles);
FimgHeader fimgHeader((fatb[nfiles - 1].end + 3) & ~3);
opt->outfile.write((char *) &narcHeader, sizeof(NarcHeader));
opt->outfile.write((char *) &fatbHeader, sizeof(FatbHeader));
opt->outfile.write((char *) fatb, sizeof(FatbEntry) * nfiles);
opt->outfile.write((char *) &fntbHeader, sizeof(FntbHeader));
opt->outfile.write((char *) fntbDir, sizeof(FntbDirHeader));
opt->outfile.write((char *) &fimgHeader, sizeof(FimgHeader));
char padding[4];
memset(padding, opt->padval, 4);
for (auto pair : opt->infiles)
{
stringstream uss(pair.second);
opt->outfile.write(pair.second.c_str(), pair.second.size());
opt->outfile.write(padding, (4 - pair.second.size()) & 3);
}
opt->outfile.close();
return 0;
} catch (invalid_argument e) {
cerr << "Invalid exception: " << e.what() << endl;
return 1;
} catch (runtime_error e) {
cerr << "Runtime error: " << e.what() << endl;
return 2;
} catch (exception e) {
cerr << "unhandled exception caught" << endl;
return 3;
}
}
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