Obfusticated

text.c

#include <stdio.h>
#define f(v,k) (((v << 2) | (~v >> 6)) ^ k)
int main(int argc, char *argv[]){
  unsigned char c = 0x01, v, p[17] = {0x00}, k = 0x00, * t,
                z[] = {0x87, 0xA3, 0x85, 0x96, 0x81, 0x90, 0x8C, 0xC4, 0xA4,
                0xCA, 0xC5, 0xA9, 0x88, 0x8B, 0x9D, 0x80, 0xEE};
  do{ 
    t = z;
    while (!((t - z) & 0x10)){
      v = f(*t, k) ^ *((t++) + 1); 
      *(p+(t-z)-0x01) = v;
      if (v >= 0x7F || (v <= 0x1F && v != 0x0A)){
        c ^= c; break;
      }   
    }   
    if (c++) printf("%s", p);
  } while (++k);
};