//this file to be compiled as a shared object

#define _GNU_SOURCE

//linux
#include <stdlib.h>
#include <stdbool.h>
#include <sys/types.h>
#include <sys/uio.h>

static void *addr;
static pid_t pid;
static long long value;
struct iovec local[1];
struct iovec remote[1];

void set_pid(pid_t p) {
    pid = p;
}

//value to compare against
void set_value(long long val) {
    value = val;
}

bool scan(void *addr, size_t type) {
    long long values[1];
    local[0].iov_base = values;
    local[0].iov_len = sizeof(long long); //may or may not get extra values
    
    remote[0].iov_base = addr;
    remote[0].iov_len = local[0].iov_len;

    process_vm_readv(pid, local, 1, remote, 1, 0);

    //write your comparison function here
    
    //switch on type to trim possible garbage data
    switch(type) {
    case sizeof(char):
        if ((char)value == (char)values[0]) {return true;} break;
        if ((short)value == (short)values[0]) {return true;} break;
        if ((int)value == (int)values[0]) {return true;} break;
        if ((long)value == (long)values[0]) {return true;} break;
    }

    return false;   
}