Type uintptr in Golang
uintptr in Golang is an integer type that is large enough to contain the bit pattern of any pointer, representing a memory address.
uint64_t in C
In C, uint64_t is an unsigned integer type that can hold values from 0 to 18,446,744,073,709,551,615.
Data Size Comparison
| Type | Bytes | Range of Values |
|---|---|---|
| long | 4 | -2,147,483,648 to 2,147,483,647 |
| unsigned long | 4 | 0 to 4,294,967,295 |
| long long | 8 | -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807 |
| unsigned long long | 8 | 0 to 18,446,744,073,709,551,615 |
Linux Data Types
size_t: 4 bytestime_t: 4 bytesclock_t: 4 byteswchar_t: 4 bytes on UNIX and Linux (2 bytes on AIX).
Relationship Between size_t and uint64_t
uint64_t is always 64-bit, while size_t size varies depending on machines/architectures. There is no direct connection between the two types.
Arithmetic with size_t
size_t is typically used for loop, array indexing, size storage, and address arithmetic purposes. While it can store a pointer, uintptr_t is more suitable for this role.