src/util.cff


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import "all.hff";

extern fn xmalloc(n usize) *void {
   let p = malloc(n);
   assert(p != #null, "malloc");
   return p;
}

extern fn xrealloc(p *void, n usize) *void {
   let p = realloc(p, n);
   assert(p != #null, "realloc");
   return p;
}


extern fn fnv1a(h u32, d [#]const u8) u32 {
   foreach(i, x, d,
      h ^= x;
      h *= 0x01000193;
   )
   return h;
}

extern fn fnv1a_s(h u32, str *const u8) u32 {
   while *str != 0 {
      h ^= *str++;
      h *= 0x01000193;
   }
   return h;
}

static filepaths [64]*const u8 = {};
static nfilepaths int = 0;

extern fn addfilepath(s *const u8) int {
   let i0 = fnv1a_s(FNV1A_INI, s) % filepaths.#len;
   let i int = i0;
   do {
      if filepaths[i] == #null {
         break;
      } else if streq(filepaths[i], s) {
         return i;
      }
   } while ++i != i0;

   assert(nfilepaths++ < filepaths.#len, "too many files");
   filepaths[i] = s;
   return i;
}