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no more NaN -> throw Exception

This commit is contained in:
Juanra Dikal 2021-03-24 18:30:45 +01:00
parent 806cc27a6f
commit 0bd13b078e
23 changed files with 229 additions and 127 deletions
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2
dist/bundles/bigint-mod-arith.esm.js vendored
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function n(n){return n>=0?n:-n}function t(n){if("number"==typeof n&&(n=BigInt(n)),1n===n)return 1;let t=1;do{t++}while((n>>=1n)>1n);return t}function r(n,t){if("number"==typeof n&&(n=BigInt(n)),"number"==typeof t&&(t=BigInt(t)),n<=0n||t<=0n)throw new RangeError("a and b MUST be > 0");let r=0n,e=1n,u=1n,f=0n;for(;0n!==n;){const o=t/n,i=t%n,g=r-u*o,c=e-f*o;t=n,n=i,r=u,e=f,u=g,f=c}return{g:t,x:r,y:e}}function e(t,r){let e="number"==typeof t?BigInt(n(t)):n(t),u="number"==typeof r?BigInt(n(r)):n(r);if(0n===e)return u;if(0n===u)return e;let f=0n;for(;0n===(1n&(e|u));)e>>=1n,u>>=1n,f++;for(;0n===(1n&e);)e>>=1n;do{for(;0n===(1n&u);)u>>=1n;if(e>u){const n=e;e=u,u=n}u-=e}while(0n!==u);return e<<f}function u(t,r){return"number"==typeof t&&(t=BigInt(t)),"number"==typeof r&&(r=BigInt(r)),0n===t&&0n===r?BigInt(0):n(t*r)/e(t,r)}function f(n,t){return n>=t?n:t}function o(n,t){return n>=t?t:n}function i(n,t){if("number"==typeof n&&(n=BigInt(n)),"number"==typeof t&&(t=BigInt(t)),t<=0n)return NaN;const r=n%t;return r<0n?r+t:r}function g(n,t){try{const e=r(i(n,t),t);return 1n!==e.g?NaN:i(e.x,t)}catch(n){return NaN}}function c(t,r,e){if("number"==typeof t&&(t=BigInt(t)),"number"==typeof r&&(r=BigInt(r)),"number"==typeof e&&(e=BigInt(e)),e<=0n)return NaN;if(1n===e)return BigInt(0);if(t=i(t,e),r<0n)return g(c(t,n(r),e),e);let u=1n;for(;r>0;)r%2n===1n&&(u=u*t%e),r/=2n,t=t**2n%e;return u}export{n as abs,t as bitLength,r as eGcd,e as gcd,u as lcm,f as max,o as min,g as modInv,c as modPow,i as toZn};
function n(n){return n>=0?n:-n}function t(n){if("number"==typeof n&&(n=BigInt(n)),1n===n)return 1;let t=1;do{t++}while((n>>=1n)>1n);return t}function r(n,t){if("number"==typeof n&&(n=BigInt(n)),"number"==typeof t&&(t=BigInt(t)),n<=0n||t<=0n)throw new RangeError("a and b MUST be > 0");let r=0n,e=1n,o=1n,u=0n;for(;0n!==n;){const i=t/n,f=t%n,g=r-o*i,b=e-u*i;t=n,n=f,r=o,e=u,o=g,u=b}return{g:t,x:r,y:e}}function e(t,r){let e="number"==typeof t?BigInt(n(t)):n(t),o="number"==typeof r?BigInt(n(r)):n(r);if(0n===e)return o;if(0n===o)return e;let u=0n;for(;0n===(1n&(e|o));)e>>=1n,o>>=1n,u++;for(;0n===(1n&e);)e>>=1n;do{for(;0n===(1n&o);)o>>=1n;if(e>o){const n=e;e=o,o=n}o-=e}while(0n!==o);return e<<u}function o(t,r){return"number"==typeof t&&(t=BigInt(t)),"number"==typeof r&&(r=BigInt(r)),0n===t&&0n===r?BigInt(0):n(t*r)/e(t,r)}function u(n,t){return n>=t?n:t}function i(n,t){return n>=t?t:n}function f(n,t){if("number"==typeof n&&(n=BigInt(n)),"number"==typeof t&&(t=BigInt(t)),t<=0n)throw new RangeError("n must be > 0");const r=n%t;return r<0n?r+t:r}function g(n,t){const e=r(f(n,t),t);if(1n!==e.g)throw new RangeError(`${n.toString()} does not have inverse modulo ${t.toString()}`);return f(e.x,t)}function b(t,r,e){if("number"==typeof t&&(t=BigInt(t)),"number"==typeof r&&(r=BigInt(r)),"number"==typeof e&&(e=BigInt(e)),e<=0n)throw new RangeError("n must be > 0");if(1n===e)return 0n;if(t=f(t,e),r<0n)return g(b(t,n(r),e),e);let o=1n;for(;r>0;)r%2n===1n&&(o=o*t%e),r/=2n,t=t**2n%e;return o}export{n as abs,t as bitLength,r as eGcd,e as gcd,o as lcm,u as max,i as min,g as modInv,b as modPow,f as toZn};

2
dist/bundles/bigint-mod-arith.iife.js vendored
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var bigintModArith=function(n){"use strict";function t(n){return n>=0?n:-n}function r(n,t){if("number"==typeof n&&(n=BigInt(n)),"number"==typeof t&&(t=BigInt(t)),n<=0n||t<=0n)throw new RangeError("a and b MUST be > 0");let r=0n,e=1n,u=1n,i=0n;for(;0n!==n;){const o=t/n,f=t%n,c=r-u*o,g=e-i*o;t=n,n=f,r=u,e=i,u=c,i=g}return{g:t,x:r,y:e}}function e(n,r){let e="number"==typeof n?BigInt(t(n)):t(n),u="number"==typeof r?BigInt(t(r)):t(r);if(0n===e)return u;if(0n===u)return e;let i=0n;for(;0n===(1n&(e|u));)e>>=1n,u>>=1n,i++;for(;0n===(1n&e);)e>>=1n;do{for(;0n===(1n&u);)u>>=1n;if(e>u){const n=e;e=u,u=n}u-=e}while(0n!==u);return e<<i}function u(n,t){if("number"==typeof n&&(n=BigInt(n)),"number"==typeof t&&(t=BigInt(t)),t<=0n)return NaN;const r=n%t;return r<0n?r+t:r}function i(n,t){try{const e=r(u(n,t),t);return 1n!==e.g?NaN:u(e.x,t)}catch(n){return NaN}}return n.abs=t,n.bitLength=function(n){if("number"==typeof n&&(n=BigInt(n)),1n===n)return 1;let t=1;do{t++}while((n>>=1n)>1n);return t},n.eGcd=r,n.gcd=e,n.lcm=function(n,r){return"number"==typeof n&&(n=BigInt(n)),"number"==typeof r&&(r=BigInt(r)),0n===n&&0n===r?BigInt(0):t(n*r)/e(n,r)},n.max=function(n,t){return n>=t?n:t},n.min=function(n,t){return n>=t?t:n},n.modInv=i,n.modPow=function n(r,e,o){if("number"==typeof r&&(r=BigInt(r)),"number"==typeof e&&(e=BigInt(e)),"number"==typeof o&&(o=BigInt(o)),o<=0n)return NaN;if(1n===o)return BigInt(0);if(r=u(r,o),e<0n)return i(n(r,t(e),o),o);let f=1n;for(;e>0;)e%2n===1n&&(f=f*r%o),e/=2n,r=r**2n%o;return f},n.toZn=u,Object.defineProperty(n,"__esModule",{value:!0}),n}({});
var bigintModArith=function(n){"use strict";function t(n){return n>=0?n:-n}function r(n,t){if("number"==typeof n&&(n=BigInt(n)),"number"==typeof t&&(t=BigInt(t)),n<=0n||t<=0n)throw new RangeError("a and b MUST be > 0");let r=0n,e=1n,o=1n,i=0n;for(;0n!==n;){const u=t/n,f=t%n,g=r-o*u,b=e-i*u;t=n,n=f,r=o,e=i,o=g,i=b}return{g:t,x:r,y:e}}function e(n,r){let e="number"==typeof n?BigInt(t(n)):t(n),o="number"==typeof r?BigInt(t(r)):t(r);if(0n===e)return o;if(0n===o)return e;let i=0n;for(;0n===(1n&(e|o));)e>>=1n,o>>=1n,i++;for(;0n===(1n&e);)e>>=1n;do{for(;0n===(1n&o);)o>>=1n;if(e>o){const n=e;e=o,o=n}o-=e}while(0n!==o);return e<<i}function o(n,t){if("number"==typeof n&&(n=BigInt(n)),"number"==typeof t&&(t=BigInt(t)),t<=0n)throw new RangeError("n must be > 0");const r=n%t;return r<0n?r+t:r}function i(n,t){const e=r(o(n,t),t);if(1n!==e.g)throw new RangeError(`${n.toString()} does not have inverse modulo ${t.toString()}`);return o(e.x,t)}return n.abs=t,n.bitLength=function(n){if("number"==typeof n&&(n=BigInt(n)),1n===n)return 1;let t=1;do{t++}while((n>>=1n)>1n);return t},n.eGcd=r,n.gcd=e,n.lcm=function(n,r){return"number"==typeof n&&(n=BigInt(n)),"number"==typeof r&&(r=BigInt(r)),0n===n&&0n===r?BigInt(0):t(n*r)/e(n,r)},n.max=function(n,t){return n>=t?n:t},n.min=function(n,t){return n>=t?t:n},n.modInv=i,n.modPow=function n(r,e,u){if("number"==typeof r&&(r=BigInt(r)),"number"==typeof e&&(e=BigInt(e)),"number"==typeof u&&(u=BigInt(u)),u<=0n)throw new RangeError("n must be > 0");if(1n===u)return 0n;if(r=o(r,u),e<0n)return i(n(r,t(e),u),u);let f=1n;for(;e>0;)e%2n===1n&&(f=f*r%u),e/=2n,r=r**2n%u;return f},n.toZn=o,Object.defineProperty(n,"__esModule",{value:!0}),n}({});

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dist/bundles/bigint-mod-arith.umd.js vendored
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@ -1 +1 @@
!function(n,t){"object"==typeof exports&&"undefined"!=typeof module?t(exports):"function"==typeof define&&define.amd?define(["exports"],t):t((n="undefined"!=typeof globalThis?globalThis:n||self).bigintModArith={})}(this,(function(n){"use strict";function t(n){return n>=0?n:-n}function e(n,t){if("number"==typeof n&&(n=BigInt(n)),"number"==typeof t&&(t=BigInt(t)),n<=0n||t<=0n)throw new RangeError("a and b MUST be > 0");let e=0n,r=1n,o=1n,i=0n;for(;0n!==n;){const f=t/n,u=t%n,c=e-o*f,g=r-i*f;t=n,n=u,e=o,r=i,o=c,i=g}return{g:t,x:e,y:r}}function r(n,e){let r="number"==typeof n?BigInt(t(n)):t(n),o="number"==typeof e?BigInt(t(e)):t(e);if(0n===r)return o;if(0n===o)return r;let i=0n;for(;0n===(1n&(r|o));)r>>=1n,o>>=1n,i++;for(;0n===(1n&r);)r>>=1n;do{for(;0n===(1n&o);)o>>=1n;if(r>o){const n=r;r=o,o=n}o-=r}while(0n!==o);return r<<i}function o(n,t){if("number"==typeof n&&(n=BigInt(n)),"number"==typeof t&&(t=BigInt(t)),t<=0n)return NaN;const e=n%t;return e<0n?e+t:e}function i(n,t){try{const r=e(o(n,t),t);return 1n!==r.g?NaN:o(r.x,t)}catch(n){return NaN}}n.abs=t,n.bitLength=function(n){if("number"==typeof n&&(n=BigInt(n)),1n===n)return 1;let t=1;do{t++}while((n>>=1n)>1n);return t},n.eGcd=e,n.gcd=r,n.lcm=function(n,e){return"number"==typeof n&&(n=BigInt(n)),"number"==typeof e&&(e=BigInt(e)),0n===n&&0n===e?BigInt(0):t(n*e)/r(n,e)},n.max=function(n,t){return n>=t?n:t},n.min=function(n,t){return n>=t?t:n},n.modInv=i,n.modPow=function n(e,r,f){if("number"==typeof e&&(e=BigInt(e)),"number"==typeof r&&(r=BigInt(r)),"number"==typeof f&&(f=BigInt(f)),f<=0n)return NaN;if(1n===f)return BigInt(0);if(e=o(e,f),r<0n)return i(n(e,t(r),f),f);let u=1n;for(;r>0;)r%2n===1n&&(u=u*e%f),r/=2n,e=e**2n%f;return u},n.toZn=o,Object.defineProperty(n,"__esModule",{value:!0})}));
!function(n,e){"object"==typeof exports&&"undefined"!=typeof module?e(exports):"function"==typeof define&&define.amd?define(["exports"],e):e((n="undefined"!=typeof globalThis?globalThis:n||self).bigintModArith={})}(this,(function(n){"use strict";function e(n){return n>=0?n:-n}function t(n,e){if("number"==typeof n&&(n=BigInt(n)),"number"==typeof e&&(e=BigInt(e)),n<=0n||e<=0n)throw new RangeError("a and b MUST be > 0");let t=0n,r=1n,o=1n,i=0n;for(;0n!==n;){const f=e/n,u=e%n,g=t-o*f,b=r-i*f;e=n,n=u,t=o,r=i,o=g,i=b}return{g:e,x:t,y:r}}function r(n,t){let r="number"==typeof n?BigInt(e(n)):e(n),o="number"==typeof t?BigInt(e(t)):e(t);if(0n===r)return o;if(0n===o)return r;let i=0n;for(;0n===(1n&(r|o));)r>>=1n,o>>=1n,i++;for(;0n===(1n&r);)r>>=1n;do{for(;0n===(1n&o);)o>>=1n;if(r>o){const n=r;r=o,o=n}o-=r}while(0n!==o);return r<<i}function o(n,e){if("number"==typeof n&&(n=BigInt(n)),"number"==typeof e&&(e=BigInt(e)),e<=0n)throw new RangeError("n must be > 0");const t=n%e;return t<0n?t+e:t}function i(n,e){const r=t(o(n,e),e);if(1n!==r.g)throw new RangeError(`${n.toString()} does not have inverse modulo ${e.toString()}`);return o(r.x,e)}n.abs=e,n.bitLength=function(n){if("number"==typeof n&&(n=BigInt(n)),1n===n)return 1;let e=1;do{e++}while((n>>=1n)>1n);return e},n.eGcd=t,n.gcd=r,n.lcm=function(n,t){return"number"==typeof n&&(n=BigInt(n)),"number"==typeof t&&(t=BigInt(t)),0n===n&&0n===t?BigInt(0):e(n*t)/r(n,t)},n.max=function(n,e){return n>=e?n:e},n.min=function(n,e){return n>=e?e:n},n.modInv=i,n.modPow=function n(t,r,f){if("number"==typeof t&&(t=BigInt(t)),"number"==typeof r&&(r=BigInt(r)),"number"==typeof f&&(f=BigInt(f)),f<=0n)throw new RangeError("n must be > 0");if(1n===f)return 0n;if(t=o(t,f),r<0n)return i(n(t,e(r),f),f);let u=1n;for(;r>0;)r%2n===1n&&(u=u*t%f),r/=2n,t=t**2n%f;return u},n.toZn=o,Object.defineProperty(n,"__esModule",{value:!0})}));

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dist/cjs/index.node.cjs vendored
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dist/esm/index.browser.js vendored
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dist/esm/index.node.js vendored
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3
dist/esm/types/ts/egcd.d.ts vendored
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@ -10,6 +10,9 @@ export interface Egcd {
* @param a
* @param b
*
* @throws {RangeError}
* This excepction is thrown if a or b are less than 0
*
* @returns A triple (g, x, y), such that ax + by = g = gcd(a, b).
*/
export declare function eGcd(a: number | bigint, b: number | bigint): Egcd;

2
dist/esm/types/ts/egcd.d.ts.map vendored
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@ -1 +1 @@
{"version":3,"file":"egcd.d.ts","sourceRoot":"","sources":["../../../../src/ts/egcd.ts"],"names":[],"mappings":"AAAA,MAAM,WAAW,IAAI;IACnB,CAAC,EAAE,MAAM,CAAA;IACT,CAAC,EAAE,MAAM,CAAA;IACT,CAAC,EAAE,MAAM,CAAA;CACV;AACD;;;;;;;;GAQG;AACH,wBAAgB,IAAI,CAAE,CAAC,EAAE,MAAM,GAAC,MAAM,EAAE,CAAC,EAAE,MAAM,GAAC,MAAM,GAAG,IAAI,CA4B9D"}
{"version":3,"file":"egcd.d.ts","sourceRoot":"","sources":["../../../../src/ts/egcd.ts"],"names":[],"mappings":"AAAA,MAAM,WAAW,IAAI;IACnB,CAAC,EAAE,MAAM,CAAA;IACT,CAAC,EAAE,MAAM,CAAA;IACT,CAAC,EAAE,MAAM,CAAA;CACV;AACD;;;;;;;;;;;GAWG;AACH,wBAAgB,IAAI,CAAE,CAAC,EAAE,MAAM,GAAC,MAAM,EAAE,CAAC,EAAE,MAAM,GAAC,MAAM,GAAG,IAAI,CA4B9D"}

7
dist/esm/types/ts/modInv.d.ts vendored
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@ -4,7 +4,10 @@
* @param a The number to find an inverse for
* @param n The modulo
*
* @returns The inverse modulo n or number NaN if it does not exist
* @throws {RangeError}
* Excpeption thorwn when a does not have inverse modulo n
*
* @returns The inverse modulo n
*/
export declare function modInv(a: number | bigint, n: number | bigint): bigint | number;
export declare function modInv(a: number | bigint, n: number | bigint): bigint;
//# sourceMappingURL=modInv.d.ts.map

2
dist/esm/types/ts/modInv.d.ts.map vendored
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@ -1 +1 @@
{"version":3,"file":"modInv.d.ts","sourceRoot":"","sources":["../../../../src/ts/modInv.ts"],"names":[],"mappings":"AAEA;;;;;;;GAOG;AACH,wBAAgB,MAAM,CAAE,CAAC,EAAE,MAAM,GAAC,MAAM,EAAE,CAAC,EAAE,MAAM,GAAC,MAAM,GAAG,MAAM,GAAC,MAAM,CAWzE"}
{"version":3,"file":"modInv.d.ts","sourceRoot":"","sources":["../../../../src/ts/modInv.ts"],"names":[],"mappings":"AAEA;;;;;;;;;;GAUG;AACH,wBAAgB,MAAM,CAAE,CAAC,EAAE,MAAM,GAAC,MAAM,EAAE,CAAC,EAAE,MAAM,GAAC,MAAM,GAAG,MAAM,CAOlE"}

7
dist/esm/types/ts/modPow.d.ts vendored
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@ -5,7 +5,10 @@
* @param e exponent
* @param n modulo
*
* @returns b**e mod n or number NaN if n <= 0
* @throws {RangeError}
* Excpeption thrown when n is not > 0
*
* @returns b**e mod n
*/
export declare function modPow(b: number | bigint, e: number | bigint, n: number | bigint): bigint | number;
export declare function modPow(b: number | bigint, e: number | bigint, n: number | bigint): bigint;
//# sourceMappingURL=modPow.d.ts.map

2
dist/esm/types/ts/modPow.d.ts.map vendored
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@ -1 +1 @@
{"version":3,"file":"modPow.d.ts","sourceRoot":"","sources":["../../../../src/ts/modPow.ts"],"names":[],"mappings":"AAGA;;;;;;;;GAQG;AACH,wBAAgB,MAAM,CAAE,CAAC,EAAE,MAAM,GAAC,MAAM,EAAE,CAAC,EAAE,MAAM,GAAC,MAAM,EAAE,CAAC,EAAE,MAAM,GAAC,MAAM,GAAG,MAAM,GAAC,MAAM,CAsB3F"}
{"version":3,"file":"modPow.d.ts","sourceRoot":"","sources":["../../../../src/ts/modPow.ts"],"names":[],"mappings":"AAGA;;;;;;;;;;;GAWG;AACH,wBAAgB,MAAM,CAAE,CAAC,EAAE,MAAM,GAAC,MAAM,EAAE,CAAC,EAAE,MAAM,GAAC,MAAM,EAAE,CAAC,EAAE,MAAM,GAAC,MAAM,GAAG,MAAM,CA0BpF"}

11
dist/esm/types/ts/toZn.d.ts vendored
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@ -4,10 +4,13 @@
* @remarks
* a and b must be the same type, either number or bigint
*
* @param {number|bigint} a An integer
* @param {number|bigint} n The modulo
* @param a - An integer
* @param n - The modulo
*
* @returns A bigint with the smallest positive representation of a modulo n or number NaN if n < 0
* @throws {RangeError}
* Excpeption thrown when n is not > 0
*
* @returns A bigint with the smallest positive representation of a modulo n
*/
export declare function toZn(a: number | bigint, n: number | bigint): bigint | number;
export declare function toZn(a: number | bigint, n: number | bigint): bigint;
//# sourceMappingURL=toZn.d.ts.map

2
dist/esm/types/ts/toZn.d.ts.map vendored
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@ -1 +1 @@
{"version":3,"file":"toZn.d.ts","sourceRoot":"","sources":["../../../../src/ts/toZn.ts"],"names":[],"mappings":"AAAA;;;;;;;;;;GAUG;AACH,wBAAgB,IAAI,CAAE,CAAC,EAAE,MAAM,GAAC,MAAM,EAAE,CAAC,EAAE,MAAM,GAAC,MAAM,GAAG,MAAM,GAAC,MAAM,CAQvE"}
{"version":3,"file":"toZn.d.ts","sourceRoot":"","sources":["../../../../src/ts/toZn.ts"],"names":[],"mappings":"AAAA;;;;;;;;;;;;;GAaG;AACH,wBAAgB,IAAI,CAAE,CAAC,EAAE,MAAM,GAAC,MAAM,EAAE,CAAC,EAAE,MAAM,GAAC,MAAM,GAAG,MAAM,CAUhE"}

50
docs/API.md
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@ -41,7 +41,7 @@ Name | Type |
The absolute value of a
Defined in: [ts/abs.ts:8](https://github.com/juanelas/bigint-mod-arith/blob/6131edd/src/ts/abs.ts#L8)
Defined in: [ts/abs.ts:8](https://github.com/juanelas/bigint-mod-arith/blob/806cc27/src/ts/abs.ts#L8)
___
@ -61,7 +61,7 @@ Name | Type |
The bit length
Defined in: [ts/bitLength.ts:7](https://github.com/juanelas/bigint-mod-arith/blob/6131edd/src/ts/bitLength.ts#L7)
Defined in: [ts/bitLength.ts:7](https://github.com/juanelas/bigint-mod-arith/blob/806cc27/src/ts/bitLength.ts#L7)
___
@ -72,6 +72,9 @@ ___
An iterative implementation of the extended euclidean algorithm or extended greatest common divisor algorithm.
Take positive integers a, b as input, and return a triple (g, x, y), such that ax + by = g = gcd(a, b).
**`throws`** {RangeError}
This excepction is thrown if a or b are less than 0
#### Parameters:
Name | Type |
@ -83,7 +86,7 @@ Name | Type |
A triple (g, x, y), such that ax + by = g = gcd(a, b).
Defined in: [ts/egcd.ts:15](https://github.com/juanelas/bigint-mod-arith/blob/6131edd/src/ts/egcd.ts#L15)
Defined in: [ts/egcd.ts:18](https://github.com/juanelas/bigint-mod-arith/blob/806cc27/src/ts/egcd.ts#L18)
___
@ -104,7 +107,7 @@ Name | Type |
The greatest common divisor of a and b
Defined in: [ts/gcd.ts:10](https://github.com/juanelas/bigint-mod-arith/blob/6131edd/src/ts/gcd.ts#L10)
Defined in: [ts/gcd.ts:10](https://github.com/juanelas/bigint-mod-arith/blob/806cc27/src/ts/gcd.ts#L10)
___
@ -125,7 +128,7 @@ Name | Type |
The least common multiple of a and b
Defined in: [ts/lcm.ts:10](https://github.com/juanelas/bigint-mod-arith/blob/6131edd/src/ts/lcm.ts#L10)
Defined in: [ts/lcm.ts:10](https://github.com/juanelas/bigint-mod-arith/blob/806cc27/src/ts/lcm.ts#L10)
___
@ -146,7 +149,7 @@ Name | Type |
Maximum of numbers a and b
Defined in: [ts/max.ts:9](https://github.com/juanelas/bigint-mod-arith/blob/6131edd/src/ts/max.ts#L9)
Defined in: [ts/max.ts:9](https://github.com/juanelas/bigint-mod-arith/blob/806cc27/src/ts/max.ts#L9)
___
@ -167,16 +170,19 @@ Name | Type |
Minimum of numbers a and b
Defined in: [ts/min.ts:9](https://github.com/juanelas/bigint-mod-arith/blob/6131edd/src/ts/min.ts#L9)
Defined in: [ts/min.ts:9](https://github.com/juanelas/bigint-mod-arith/blob/806cc27/src/ts/min.ts#L9)
___
### modInv
▸ **modInv**(`a`: *number* \| *bigint*, `n`: *number* \| *bigint*): *bigint* \| *number*
▸ **modInv**(`a`: *number* \| *bigint*, `n`: *number* \| *bigint*): *bigint*
Modular inverse.
**`throws`** {RangeError}
Excpeption thorwn when a does not have inverse modulo n
#### Parameters:
Name | Type | Description |
@ -184,20 +190,23 @@ Name | Type | Description |
`a` | *number* \| *bigint* | The number to find an inverse for |
`n` | *number* \| *bigint* | The modulo |
**Returns:** *bigint* \| *number*
**Returns:** *bigint*
The inverse modulo n or number NaN if it does not exist
The inverse modulo n
Defined in: [ts/modInv.ts:11](https://github.com/juanelas/bigint-mod-arith/blob/6131edd/src/ts/modInv.ts#L11)
Defined in: [ts/modInv.ts:14](https://github.com/juanelas/bigint-mod-arith/blob/806cc27/src/ts/modInv.ts#L14)
___
### modPow
▸ **modPow**(`b`: *number* \| *bigint*, `e`: *number* \| *bigint*, `n`: *number* \| *bigint*): *bigint* \| *number*
▸ **modPow**(`b`: *number* \| *bigint*, `e`: *number* \| *bigint*, `n`: *number* \| *bigint*): *bigint*
Modular exponentiation b**e mod n. Currently using the right-to-left binary method
**`throws`** {RangeError}
Excpeption thrown when n is not > 0
#### Parameters:
Name | Type | Description |
@ -206,23 +215,26 @@ Name | Type | Description |
`e` | *number* \| *bigint* | exponent |
`n` | *number* \| *bigint* | modulo |
**Returns:** *bigint* \| *number*
**Returns:** *bigint*
b**e mod n or number NaN if n <= 0
b**e mod n
Defined in: [ts/modPow.ts:13](https://github.com/juanelas/bigint-mod-arith/blob/6131edd/src/ts/modPow.ts#L13)
Defined in: [ts/modPow.ts:16](https://github.com/juanelas/bigint-mod-arith/blob/806cc27/src/ts/modPow.ts#L16)
___
### toZn
▸ **toZn**(`a`: *number* \| *bigint*, `n`: *number* \| *bigint*): *bigint* \| *number*
▸ **toZn**(`a`: *number* \| *bigint*, `n`: *number* \| *bigint*): *bigint*
Finds the smallest positive element that is congruent to a in modulo n
**`remarks`**
a and b must be the same type, either number or bigint
**`throws`** {RangeError}
Excpeption thrown when n is not > 0
#### Parameters:
Name | Type | Description |
@ -230,8 +242,8 @@ Name | Type | Description |
`a` | *number* \| *bigint* | An integer |
`n` | *number* \| *bigint* | The modulo |
**Returns:** *bigint* \| *number*
**Returns:** *bigint*
A bigint with the smallest positive representation of a modulo n or number NaN if n < 0
A bigint with the smallest positive representation of a modulo n
Defined in: [ts/toZn.ts:12](https://github.com/juanelas/bigint-mod-arith/blob/6131edd/src/ts/toZn.ts#L12)
Defined in: [ts/toZn.ts:15](https://github.com/juanelas/bigint-mod-arith/blob/806cc27/src/ts/toZn.ts#L15)

6
docs/interfaces/egcd.md
View File

@ -16,7 +16,7 @@
• **g**: *bigint*
Defined in: [ts/egcd.ts:2](https://github.com/juanelas/bigint-mod-arith/blob/6131edd/src/ts/egcd.ts#L2)
Defined in: [ts/egcd.ts:2](https://github.com/juanelas/bigint-mod-arith/blob/806cc27/src/ts/egcd.ts#L2)
___
@ -24,7 +24,7 @@ ___
• **x**: *bigint*
Defined in: [ts/egcd.ts:3](https://github.com/juanelas/bigint-mod-arith/blob/6131edd/src/ts/egcd.ts#L3)
Defined in: [ts/egcd.ts:3](https://github.com/juanelas/bigint-mod-arith/blob/806cc27/src/ts/egcd.ts#L3)
___
@ -32,4 +32,4 @@ ___
• **y**: *bigint*
Defined in: [ts/egcd.ts:4](https://github.com/juanelas/bigint-mod-arith/blob/6131edd/src/ts/egcd.ts#L4)
Defined in: [ts/egcd.ts:4](https://github.com/juanelas/bigint-mod-arith/blob/806cc27/src/ts/egcd.ts#L4)

3
src/ts/egcd.ts
View File

@ -10,6 +10,9 @@ export interface Egcd {
* @param a
* @param b
*
* @throws {RangeError}
* This excepction is thrown if a or b are less than 0
*
* @returns A triple (g, x, y), such that ax + by = g = gcd(a, b).
*/
export function eGcd (a: number|bigint, b: number|bigint): Egcd {

13
src/ts/modInv.ts
View File

@ -6,17 +6,16 @@ import { toZn } from './toZn'
* @param a The number to find an inverse for
* @param n The modulo
*
* @returns The inverse modulo n or number NaN if it does not exist
* @throws {RangeError}
* Excpeption thorwn when a does not have inverse modulo n
*
* @returns The inverse modulo n
*/
export function modInv (a: number|bigint, n: number|bigint): bigint|number {
try {
export function modInv (a: number|bigint, n: number|bigint): bigint {
const egcd = eGcd(toZn(a, n), n)
if (egcd.g !== 1n) {
return NaN // modular inverse does not exist
throw new RangeError(`${a.toString()} does not have inverse modulo ${n.toString()}`) // modular inverse does not exist
} else {
return toZn(egcd.x, n)
}
} catch (error) {
return NaN
}
}

15
src/ts/modPow.ts
View File

@ -8,16 +8,23 @@ import { toZn } from './toZn'
* @param e exponent
* @param n modulo
*
* @returns b**e mod n or number NaN if n <= 0
* @throws {RangeError}
* Excpeption thrown when n is not > 0
*
* @returns b**e mod n
*/
export function modPow (b: number|bigint, e: number|bigint, n: number|bigint): bigint|number {
export function modPow (b: number|bigint, e: number|bigint, n: number|bigint): bigint {
if (typeof b === 'number') b = BigInt(b)
if (typeof e === 'number') e = BigInt(e)
if (typeof n === 'number') n = BigInt(n)
if (n <= 0n) { return NaN } else if (n === 1n) { return BigInt(0) }
if (n <= 0n) {
throw new RangeError('n must be > 0')
} else if (n === 1n) {
return 0n
}
b = toZn(b, n) as bigint
b = toZn(b, n)
if (e < 0n) {
return modInv(modPow(b, abs(e), n), n)

15
src/ts/toZn.ts
View File

@ -4,16 +4,21 @@
* @remarks
* a and b must be the same type, either number or bigint
*
* @param {number|bigint} a An integer
* @param {number|bigint} n The modulo
* @param a - An integer
* @param n - The modulo
*
* @returns A bigint with the smallest positive representation of a modulo n or number NaN if n < 0
* @throws {RangeError}
* Excpeption thrown when n is not > 0
*
* @returns A bigint with the smallest positive representation of a modulo n
*/
export function toZn (a: number|bigint, n: number|bigint): bigint|number {
export function toZn (a: number|bigint, n: number|bigint): bigint {
if (typeof a === 'number') a = BigInt(a)
if (typeof n === 'number') n = BigInt(n)
if (n <= 0n) { return NaN }
if (n <= 0n) {
throw new RangeError('n must be > 0')
}
const aZn = a % n
return (aZn < 0n) ? aZn + n : aZn

25
test/modInv.ts
View File

@ -14,21 +14,20 @@ describe('modInv', function () {
a: BigInt(-2),
n: BigInt(5),
modInv: BigInt(2)
},
}]
const invalidInputs = [
{
a: BigInt(2),
n: BigInt(4),
modInv: NaN
n: BigInt(4)
},
{
a: BigInt(0),
n: BigInt(0),
modInv: NaN
n: BigInt(0)
},
{
a: BigInt(0),
n: BigInt(37),
modInv: NaN
n: BigInt(37)
}
]
for (const input of inputs) {
@ -40,4 +39,16 @@ describe('modInv', function () {
})
})
}
for (const input of invalidInputs) {
describe(`modInv(${input.a}, ${input.n})`, function () {
it('should throw RangeError', function () {
try {
_pkg.modInv(input.a, input.n)
throw new Error('should have failed')
} catch (err) {
chai.expect(err).to.be.instanceOf(RangeError)
}
})
})
}
})

25
test/modPow.ts
View File

@ -1,11 +1,5 @@
describe('modPow', function () {
const inputs = [
{
a: BigInt(4),
b: BigInt(-1),
n: BigInt(0),
modPow: NaN
},
{
a: BigInt(4),
b: BigInt(-1),
@ -37,6 +31,13 @@ describe('modPow', function () {
modPow: BigInt(2)
}
]
const invalidInputs = [
{
a: BigInt(4),
b: BigInt(-1),
n: BigInt(0)
}
]
this.timeout(90000)
for (const input of inputs) {
@ -47,6 +48,18 @@ describe('modPow', function () {
})
})
}
for (const input of invalidInputs) {
describe(`modPow(${input.a}, ${input.b}, ${input.n})`, function () {
it('should throw RangeError', function () {
try {
_pkg.modPow(input.a, input.b, input.n)
throw new Error('should have failed')
} catch (err) {
chai.expect(err).to.be.instanceOf(RangeError)
}
})
})
}
describe('Time profiling', function () {
let iterations = 500
it(`just testing ${iterations} iterations of a big modular exponentiation (1024 bits)`, function () {

19
test/toZn.ts
View File

@ -16,6 +16,13 @@ describe('toZn', function () {
toZn: BigInt(4)
}
]
const invalidInputs = [
{
a: BigInt(4),
n: BigInt(-1),
toZn: BigInt(0)
}
]
for (const input of inputs) {
describe(`toZn(${input.a}, ${input.n})`, function () {
it(`should return ${input.toZn}`, function () {
@ -24,4 +31,16 @@ describe('toZn', function () {
})
})
}
for (const input of invalidInputs) {
describe(`toZn(${input.a}, ${input.n})`, function () {
it('should throw RangeError', function () {
try {
_pkg.toZn(input.a, input.n)
throw new Error('should have failed')
} catch (err) {
chai.expect(err).to.be.instanceOf(RangeError)
}
})
})
}
})