kit

kit
git clone https://git.ryansepassi.com/git/kit.git
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6_5_15_02_conditional_uchar_eof.c (317B)

      1 typedef unsigned long kit_size_t;
      2 
      3 struct Zio {
      4   kit_size_t n;
      5   const char* p;
      6 };
      7 
      8 static int fill(void) { return -1; }
      9 
     10 static int get(struct Zio* z) {
     11   return ((z)->n-- > 0) ? (unsigned char)(*(z)->p++) : fill();
     12 }
     13 
     14 int test_main(void) {
     15   struct Zio z = {0, ""};
     16   int c = get(&z);
     17   return c == -1 ? 42 : c;
     18 }