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'use strict';
var assert = require('minimalistic-assert');
var inherits = require('inherits');
exports.inherits = inherits;
function isSurrogatePair(msg, i) {
if ((msg.charCodeAt(i) & 0xFC00) !== 0xD800) {
return false;
}
if (i < 0 || i + 1 >= msg.length) {
return false;
}
return (msg.charCodeAt(i + 1) & 0xFC00) === 0xDC00;
}
function toArray(msg, enc) {
if (Array.isArray(msg))
return msg.slice();
if (!msg)
return [];
var res = [];
if (typeof msg === 'string') {
if (!enc) {
// Inspired by stringToUtf8ByteArray() in closure-library by Google
// https://github.com/google/closure-library/blob/8598d87242af59aac233270742c8984e2b2bdbe0/closure/goog/crypt/crypt.js#L117-L143
// Apache License 2.0
// https://github.com/google/closure-library/blob/master/LICENSE
var p = 0;
for (var i = 0; i < msg.length; i++) {
var c = msg.charCodeAt(i);
if (c < 128) {
res[p++] = c;
} else if (c < 2048) {
res[p++] = (c >> 6) | 192;
res[p++] = (c & 63) | 128;
} else if (isSurrogatePair(msg, i)) {
c = 0x10000 + ((c & 0x03FF) << 10) + (msg.charCodeAt(++i) & 0x03FF);
res[p++] = (c >> 18) | 240;
res[p++] = ((c >> 12) & 63) | 128;
res[p++] = ((c >> 6) & 63) | 128;
res[p++] = (c & 63) | 128;
} else {
res[p++] = (c >> 12) | 224;
res[p++] = ((c >> 6) & 63) | 128;
res[p++] = (c & 63) | 128;
}
}
} else if (enc === 'hex') {
msg = msg.replace(/[^a-z0-9]+/ig, '');
if (msg.length % 2 !== 0)
msg = '0' + msg;
for (i = 0; i < msg.length; i += 2)
res.push(parseInt(msg[i] + msg[i + 1], 16));
}
} else {
for (i = 0; i < msg.length; i++)
res[i] = msg[i] | 0;
}
return res;
}
exports.toArray = toArray;
function toHex(msg) {
var res = '';
for (var i = 0; i < msg.length; i++)
res += zero2(msg[i].toString(16));
return res;
}
exports.toHex = toHex;
function htonl(w) {
var res = (w >>> 24) |
((w >>> 8) & 0xff00) |
((w << 8) & 0xff0000) |
((w & 0xff) << 24);
return res >>> 0;
}
exports.htonl = htonl;
function toHex32(msg, endian) {
var res = '';
for (var i = 0; i < msg.length; i++) {
var w = msg[i];
if (endian === 'little')
w = htonl(w);
res += zero8(w.toString(16));
}
return res;
}
exports.toHex32 = toHex32;
function zero2(word) {
if (word.length === 1)
return '0' + word;
else
return word;
}
exports.zero2 = zero2;
function zero8(word) {
if (word.length === 7)
return '0' + word;
else if (word.length === 6)
return '00' + word;
else if (word.length === 5)
return '000' + word;
else if (word.length === 4)
return '0000' + word;
else if (word.length === 3)
return '00000' + word;
else if (word.length === 2)
return '000000' + word;
else if (word.length === 1)
return '0000000' + word;
else
return word;
}
exports.zero8 = zero8;
function join32(msg, start, end, endian) {
var len = end - start;
assert(len % 4 === 0);
var res = new Array(len / 4);
for (var i = 0, k = start; i < res.length; i++, k += 4) {
var w;
if (endian === 'big')
w = (msg[k] << 24) | (msg[k + 1] << 16) | (msg[k + 2] << 8) | msg[k + 3];
else
w = (msg[k + 3] << 24) | (msg[k + 2] << 16) | (msg[k + 1] << 8) | msg[k];
res[i] = w >>> 0;
}
return res;
}
exports.join32 = join32;
function split32(msg, endian) {
var res = new Array(msg.length * 4);
for (var i = 0, k = 0; i < msg.length; i++, k += 4) {
var m = msg[i];
if (endian === 'big') {
res[k] = m >>> 24;
res[k + 1] = (m >>> 16) & 0xff;
res[k + 2] = (m >>> 8) & 0xff;
res[k + 3] = m & 0xff;
} else {
res[k + 3] = m >>> 24;
res[k + 2] = (m >>> 16) & 0xff;
res[k + 1] = (m >>> 8) & 0xff;
res[k] = m & 0xff;
}
}
return res;
}
exports.split32 = split32;
function rotr32(w, b) {
return (w >>> b) | (w << (32 - b));
}
exports.rotr32 = rotr32;
function rotl32(w, b) {
return (w << b) | (w >>> (32 - b));
}
exports.rotl32 = rotl32;
function sum32(a, b) {
return (a + b) >>> 0;
}
exports.sum32 = sum32;
function sum32_3(a, b, c) {
return (a + b + c) >>> 0;
}
exports.sum32_3 = sum32_3;
function sum32_4(a, b, c, d) {
return (a + b + c + d) >>> 0;
}
exports.sum32_4 = sum32_4;
function sum32_5(a, b, c, d, e) {
return (a + b + c + d + e) >>> 0;
}
exports.sum32_5 = sum32_5;
function sum64(buf, pos, ah, al) {
var bh = buf[pos];
var bl = buf[pos + 1];
var lo = (al + bl) >>> 0;
var hi = (lo < al ? 1 : 0) + ah + bh;
buf[pos] = hi >>> 0;
buf[pos + 1] = lo;
}
exports.sum64 = sum64;
function sum64_hi(ah, al, bh, bl) {
var lo = (al + bl) >>> 0;
var hi = (lo < al ? 1 : 0) + ah + bh;
return hi >>> 0;
}
exports.sum64_hi = sum64_hi;
function sum64_lo(ah, al, bh, bl) {
var lo = al + bl;
return lo >>> 0;
}
exports.sum64_lo = sum64_lo;
function sum64_4_hi(ah, al, bh, bl, ch, cl, dh, dl) {
var carry = 0;
var lo = al;
lo = (lo + bl) >>> 0;
carry += lo < al ? 1 : 0;
lo = (lo + cl) >>> 0;
carry += lo < cl ? 1 : 0;
lo = (lo + dl) >>> 0;
carry += lo < dl ? 1 : 0;
var hi = ah + bh + ch + dh + carry;
return hi >>> 0;
}
exports.sum64_4_hi = sum64_4_hi;
function sum64_4_lo(ah, al, bh, bl, ch, cl, dh, dl) {
var lo = al + bl + cl + dl;
return lo >>> 0;
}
exports.sum64_4_lo = sum64_4_lo;
function sum64_5_hi(ah, al, bh, bl, ch, cl, dh, dl, eh, el) {
var carry = 0;
var lo = al;
lo = (lo + bl) >>> 0;
carry += lo < al ? 1 : 0;
lo = (lo + cl) >>> 0;
carry += lo < cl ? 1 : 0;
lo = (lo + dl) >>> 0;
carry += lo < dl ? 1 : 0;
lo = (lo + el) >>> 0;
carry += lo < el ? 1 : 0;
var hi = ah + bh + ch + dh + eh + carry;
return hi >>> 0;
}
exports.sum64_5_hi = sum64_5_hi;
function sum64_5_lo(ah, al, bh, bl, ch, cl, dh, dl, eh, el) {
var lo = al + bl + cl + dl + el;
return lo >>> 0;
}
exports.sum64_5_lo = sum64_5_lo;
function rotr64_hi(ah, al, num) {
var r = (al << (32 - num)) | (ah >>> num);
return r >>> 0;
}
exports.rotr64_hi = rotr64_hi;
function rotr64_lo(ah, al, num) {
var r = (ah << (32 - num)) | (al >>> num);
return r >>> 0;
}
exports.rotr64_lo = rotr64_lo;
function shr64_hi(ah, al, num) {
return ah >>> num;
}
exports.shr64_hi = shr64_hi;
function shr64_lo(ah, al, num) {
var r = (ah << (32 - num)) | (al >>> num);
return r >>> 0;
}
exports.shr64_lo = shr64_lo;