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3.3 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. (see section Integer Functions)
  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. (see section Rational Number Functions)
  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. (see section Floating-point Functions)
  4. Functions compatible with Berkeley MP, such as itom, madd, and mult. The associated type is MINT. (see section Berkeley MP Compatible Functions)
  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. (see section Low-level Functions)
  6. Miscellaneous functions. Functions for setting up custom allocation and functions for generating random numbers. (see section Custom Allocation, and see section Random Number Functions)

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