Author :
Paul Eggert
Date :
2025-08-31 07:54:18
Hash :a7cc3c03 Message :u64: avoid theoretical problem with >64-bit int
* lib/u64.h: Include limits.h, for INT_MAX. Use uint64_t only if
INT_MAX < UINT64_MAX, to avoid undefined behavior on theoretical
platforms where adding two uint64_t expressions can have undefined
behavior on signed integer overflow.