Function fixforjump

extlibs/lua/src/lparser.c:1511–1519

** Fix for instruction at position 'pc' to jump to 'dest'. ** (Jump addresses are relative in Lua). 'back' true means ** a back jump. */

** a back jump.
*/
static void fixforjump (FuncState *fs, int pc, int dest, int back) {
  Instruction *jmp = &fs->f->code[pc];
  int offset = dest - (pc + 1);
  if (back)
    offset = -offset;
  if (unlikely(offset > MAXARG_Bx))
    luaX_syntaxerror(fs->ls, "control structure too long");
  SETARG_Bx(*jmp, offset);
}


/*