# mp(3x) [v7 man page]

MP(3X) MP(3X)NAME

itom, madd, msub, mult, mdiv, min, mout, pow, gcd, rpow - multiple precision integer arithmeticSYNOPSIS

typedef struct { int len; short *val; } mint; madd(a, b, c) msub(a, b, c) mult(a, b, c) mdiv(a, b, q, r) min(a) mout(a) pow(a, b, m, c) gcd(a, b, c) rpow(a, b, c) msqrt(a, b, r) mint *a, *b, *c, *m, *q, *r; sdiv(a, n, q, r) mint *a, *q; short *r; mint *itom(n)DESCRIPTION

These routines perform arithmetic on integers of arbitrary length. The integers are stored using the defined type mint. Pointers to a mint should be initialized using the function itom, which sets the initial value to n. After that space is managed automatically by the routines. madd, msub, mult, assign to their third arguments the sum, difference, and product, respectively, of their first two arguments. mdiv assigns the quotient and remainder, respectively, to its third and fourth arguments. sdiv is like mdiv except that the divisor is an ordi- nary integer. msqrt produces the square root and remainder of its first argument. rpow calculates a raised to the power b, while pow cal- culates this reduced modulo m. min andmout do decimal input and output. The functions are obtained with the loader option-lmp.DIAGNOSTICS

Illegal operations and running out of memory produce messages and core images. MP(3X)

## Check Out this Related Man Page

mp(3) Library Functions Manual mp(3)NAME

madd, msub, mult, mdiv, gcd, invert, rpow, msqrt, mcmp, min, omin, fmin, m_in, mout, omout, fmout, m_out, sdiv, itom - Performs multiple precision integer arithmeticLIBRARY

Object Code Library (libmp.a)SYNOPSIS

#include <mp.h> #include <stdio.h> typedef struct mint { int len; short *val; } MINT; madd( MINT *a, MINT *b, MINT *c ); msub( MINT *a, MINT *b, MINT *c ); mult( MINT *a, MINT *b, MINT *c ); mdiv( MINT *a, MINT *b, MINT *q, MINT *r ); pow( MINT *a, MINT *b, MINT *m, MINT *c ); gcd( MINT *a, MINT *b, MINT *c ); invert( MINT *a, MINT *b, MINT *c ); rpow( MINT *a, int n, MINT *c ); msqrt( MINT *a, MINT *b, MINT *r ); mcmp( MINT *a, MINT *b ); move( MINT *a, MINT *b ); min( MINT *a ); omin( MINT *a ); fmin( MINT *a, FILE *f ); m_in( MINT *a, int n, FILE *f ); mout( MINT *a ); omout( MINT *a ); fmout( MINT *a, FILE *f ); m_out( MINT *a, int n, FILE *f ); sdiv( MINT *a, short n, MINT *q, short *r ); *itom( short n );DESCRIPTION

These functions perform arithmetic on integers of arbitrary length. The integers are stored using the defined type MINT. Pointers to a MINT can be initialized using the itom() function, which sets the initial value to n. After that, space is managed automatically by the routines. The madd(), msub() , and mult() functions assign to c the sum, difference, and product, respectively, of a and b. The mdiv() function assigns to q and r the quotient and remainder obtained from dividing a by b. The sdiv() function is like the mdiv() function except that the divisor is a short integer n and the remainder is placed in a short integer whose address is given as r. The msqrt() function produces the integer square root of a in b and places the remainder in r. The rpow() function calculates in c the value of a raised to the (``regular'' integral) power n, while the pow() function calculates this with a full multiple precision exponent b and the result is reduced modulo m. The gcd() function returns the greatest common denominator of a and b in c, and the invert() function computes c such that a*c mod b = 1, for a and b relatively prime. The mcmp() function returns a negative, zero, or positive integer value when a is less than, equal to, or greater than b, respectively. The move() function copies a to b. The min() and mout() functions do decimal input and output while the omin() and omout() functions do octal input and output. More gener- ally, the fmin() and fmout() functions do decimal input and output using file f, and m_in() and m_out do input and output with arbitrary radix n. On input, records should have the form of strings of digits terminated by a newline; output records have a similar form.NOTES

Programs which use the multiple-precision arithmetic library must be compiled withdelim off mp(3)-lmp.