Infinite Loop when reading specified number of bytes from binary file
Clash Royale CLAN TAG#URR8PPPInfinite Loop when reading specified number of bytes from binary file
I have a binary file that starts something like this (in hex):
FFFF7FFF FFEFFFFF FFFFFFFF 0000454C 0000AA0E 2D2D2D2D 00002892 425A6839 31415926 5359F7B8
FA590000 A4FFFFFF FFFFFFFF FFFFFFFF FFFFFDFF EBFFFFFF FFFF7FFF FFEFFFFF FFFFFFFF FFFFFFE0
00
I'm trying to read in the header with C++. I've got code that looks like this:
#include <iostream>
#include <fstream>
#include <vector>
#include <string>
#include <cstring>
using namespace std;
typedef struct {
char tp[9];
char xt[3];
uint32_t jdt;
uint32_t jtm;
char nm[4];
} Header_1;
int main(){
Header_1 test;
ifstream infile("./testbin", ios::in | ios::binary);
vector<unsigned char> head_bytes(24, 0);
infile.read((char*)&test, head_bytes.size());
vector<unsigned char> comp_record(12, 0);
infile.read((char*)&comp_record, comp_record.size());
cout <<(char)comp_record[0]<<endl;
}
I'm compiling with clang/g++ on macOS 10.13.4, g++ --version output below:
g++ --version
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
Apple LLVM version 9.1.0 (clang-902.0.39.2)
Target: x86_64-apple-darwin17.5.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
Whenever I compile/run the code, I get one of two outcomes depending on whether or not I leave in the last cout line. If it is in there, the program crashes with a Segmentaion Fault 11 (on macOS this appears to be a stack size issue, my stack size is 8192 and I don't see a reason that indicates that increasing it will resolve my problem). If I remove the cout line, I get stuck in an infinite loop.
8192
Given that I give a specified number of bytes to read, I have no idea how I get stuck in a loop nor any idea how I run out of stack space.
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