0d073fa89e
- Add GETTING_STARTED.md with quick start guide and development modes - Add INSTALL.sh automated installation script - Add INSTALLATION_CHECKLIST.md, INSTALLATION_SUCCESS.md, and INSTALLATION_SUMMARY.md - Add QUICK_REFERENCE.md for common commands - Add SETUP_GUIDE.md with detailed setup instructions - Update README.md with improved project overview - Add did-wallet app dependencies and node_modules
67 lines
1.5 KiB
JavaScript
67 lines
1.5 KiB
JavaScript
/* Common package for dealing with hex/string/uint8 conversions (and sha1 hashing)
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*
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* @author Jimmy Wärting <jimmy@warting.se> (https://jimmy.warting.se/opensource)
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* @license MIT
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*/
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export const alphabet = '0123456789abcdef'
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const encodeLookup = []
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const decodeLookup = []
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for (let i = 0; i < 256; i++) {
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encodeLookup[i] = alphabet[i >> 4 & 0xf] + alphabet[i & 0xf]
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if (i < 16) {
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if (i < 10) {
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decodeLookup[0x30 + i] = i
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} else {
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decodeLookup[0x61 - 10 + i] = i
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}
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}
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}
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export const arr2hex = data => {
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const length = data.length
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let string = ''
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let i = 0
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while (i < length) {
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string += encodeLookup[data[i++]]
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}
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return string
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}
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export const hex2arr = str => {
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const sizeof = str.length >> 1
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const length = sizeof << 1
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const array = new Uint8Array(sizeof)
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let n = 0
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let i = 0
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while (i < length) {
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array[n++] = decodeLookup[str.charCodeAt(i++)] << 4 | decodeLookup[str.charCodeAt(i++)]
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}
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return array
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}
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export const concat = (chunks, size = 0) => {
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const length = chunks.length || 0
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if (!size) {
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let i = length
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while (i--) size += chunks[i].length
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}
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const b = new Uint8Array(size)
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let offset = size
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let i = length
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while (i--) {
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offset -= chunks[i].length
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b.set(chunks[i], offset)
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}
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return b
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}
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export const equal = (a, b) => {
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if (a.length !== b.length) return false
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for (let i = a.length; i > -1; i -= 1) {
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if ((a[i] !== b[i])) return false
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}
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return true
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}
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