- value = (*p++ & 0x1) << 30;
- value |= (*p++ & 0x3f) << 24;
- value |= (*p++ & 0x3f) << 18;
- value |= (*p++ & 0x3f) << 12;
+ value = ((unsigned long)(*p++ & 0x1)) << 30;
+ value |= ((unsigned long)(*p++ & 0x3f)) << 24;
+ value |= ((unsigned long)(*p++ & 0x3f)) << 18;
+ value |= ((unsigned long)(*p++ & 0x3f)) << 12;