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Function Classes

There are six classes of functions in the GMP library:

  1. Functions for signed integer arithmetic, with names beginning with mpz_. The associated type is mpz_t. There are about 150 functions in this class.
  2. Functions for rational number arithmetic, with names beginning with mpq_. The associated type is mpq_t. There are about 40 functions in this class, but the integer functions can be used for arithmetic on the numerator and denominator separately.
  3. Functions for floating-point arithmetic, with names beginning with mpf_. The associated type is mpf_t. There are about 60 functions is this class.
  4. Functions compatible with Berkeley MP, such as itom, madd, and mult. The associated type is MINT.
  5. Fast low-level functions that operate on natural numbers. These are used by the functions in the preceding groups, and you can also call them directly from very time-critical user programs. These functions' names begin with mpn_. The associated type is array of mp_limb_t. There are about 30 (hard-to-use) functions in this class.
  6. Miscellaneous functions. Functions for setting up custom allocation and functions for generating random numbers.