BINBCHrename

#include <iostream>
#include <fstream>
#include <string>
#include <cstring>
using namespace std;

    //   compiled version and source sans comments can be found at:
    //         https://dl.dropboxusercontent.com/u/40407085/Stuff/binbchren.zip
    //   put this in the directory of the BINs and run it
    // make sure to pipe the output somewhere so you can track what gets renamed to what

unsigned long unlend(char bytes[]) {            // convert little-endian to decimal
    unsigned long pos = 0;
    for (int i=3; i>=0; i--) {
        pos = pos*256 + (unsigned char)bytes[i];
    }
    return pos;
}

bool isLowcase(string str) {                // actually checks if there's no uppercase
    int len = str.length();
    bool ret = true;
    for (int i=0; i<len; i++) {
        ret = ret && (tolower(str[i]) == str[i]);
    }
    return ret;
}

int main() {
    unsigned long beg,end,len,cpos;
    string nname;
    char* mcode;
    char* pos;
    char* buffer;
    char* name;
    char* pch;
    bool namefound;
    mcode = new char [3];
    pos = new char [4];
    for (int fcount=0; fcount<=25601; fcount++) {
        ifstream infile (to_string(fcount)+".bin", ios::binary);
        if (infile.is_open()){
            namefound = false;
            infile.read(mcode, 3);
            cout << fcount << ".bin\n";
            if (strcmp(mcode,"BCH") == 0) {
                infile.seekg(0xC);
                infile.read(pos,4);
                beg = unlend(pos);
                infile.read(pos,4);
                end = unlend(pos);
                if (end > beg) {
                    len = end-beg;
                    infile.seekg(beg);
                    delete[] buffer;
                    buffer = new char [len];
                    cpos = infile.tellg();
                    infile.read(buffer,len);
                    cpos += strlen(buffer)+1;
                    infile.seekg(cpos);
                    while (cpos < end) {
                        if (strchr(buffer,'@') != NULL) {
                            if (isLowcase(string(buffer))) {
                                cout << " " << buffer << "\n";  // this part separates file name from
                                strtok(buffer,"@");     // string containing @s
                                name = strtok(NULL,"@");
                                nname = string(name);
                                namefound = true;
                            }
                        }
                        infile.read(buffer,len);
                        cpos += strlen(buffer)+1;
                        infile.seekg(cpos);
                    }
                }
            }
            infile.close();
            if (namefound) {
                string fn = to_string(fcount)+".bin";
                string ofn = nname+".bch";
                cout << "  " << fn.c_str() << " -> " << ofn.c_str() << endl;
                rename(fn.c_str(), ofn.c_str());
            }
        }
    }
    return 0;
}