Stint (Stack-based multiprecision integers)

A fast and portable stack-based multi-precision integer library in pure Nim

Main focus:

• Portability
  • 32 and 64 bit arch
  • ARM for usage on mobile phones
  • Additionally RISC-V and MIPS for open hardware and low power IoT devices.
• Speed, library is carefully tuned to produce the best assembly given the current compilers. However, the library itself does not resort to assembly for portability.
• No heap/dynamic allocation
• Ethereum applications
  • Uint256/Int256 for Ethereum Virtual Machine usage.
  • Uint2048 for Ethereum Bloom filters
• Ease of use:
  • Use traditional +, -, +=, etc operators like on native types
  • Representation of numbers in memory is the exact same as native types and endianness aware.
    • In practice that means that interfacing with binary blobs representing numbers from cryptographic libraries can be done with a cast if it represents a Uint256, Uint512, Uint1024, Uint2048.
  • converting to and from Hex
  • converting to and from decimal strings

License

Licensed and distributed under either of

• MIT license: LICENSE-MIT or http://opensource.org/licenses/MIT

or

• Apache License, Version 2.0, (LICENSE-APACHEv2 or http://www.apache.org/licenses/LICENSE-2.0)

at your option. This file may not be copied, modified, or distributed except according to those terms.