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JavaScript
import * as Bytes from '../Bytes.js';
/** @internal */
export function assertSize(bytes, size_) {
if (Bytes.size(bytes) > size_)
throw new Bytes.SizeOverflowError({
givenSize: Bytes.size(bytes),
maxSize: size_,
});
}
/** @internal */
export function assertStartOffset(value, start) {
if (typeof start === 'number' && start > 0 && start > Bytes.size(value) - 1)
throw new Bytes.SliceOffsetOutOfBoundsError({
offset: start,
position: 'start',
size: Bytes.size(value),
});
}
/** @internal */
export function assertEndOffset(value, start, end) {
if (typeof start === 'number' &&
typeof end === 'number' &&
Bytes.size(value) !== end - start) {
throw new Bytes.SliceOffsetOutOfBoundsError({
offset: end,
position: 'end',
size: Bytes.size(value),
});
}
}
/** @internal */
export const charCodeMap = {
zero: 48,
nine: 57,
A: 65,
F: 70,
a: 97,
f: 102,
};
/** @internal */
export function charCodeToBase16(char) {
if (char >= charCodeMap.zero && char <= charCodeMap.nine)
return char - charCodeMap.zero;
if (char >= charCodeMap.A && char <= charCodeMap.F)
return char - (charCodeMap.A - 10);
if (char >= charCodeMap.a && char <= charCodeMap.f)
return char - (charCodeMap.a - 10);
return undefined;
}
/** @internal */
export function pad(bytes, options = {}) {
const { dir, size = 32 } = options;
if (size === 0)
return bytes;
if (bytes.length > size)
throw new Bytes.SizeExceedsPaddingSizeError({
size: bytes.length,
targetSize: size,
type: 'Bytes',
});
const paddedBytes = new Uint8Array(size);
for (let i = 0; i < size; i++) {
const padEnd = dir === 'right';
paddedBytes[padEnd ? i : size - i - 1] =
bytes[padEnd ? i : bytes.length - i - 1];
}
return paddedBytes;
}
/** @internal */
export function trim(value, options = {}) {
const { dir = 'left' } = options;
let data = value;
let sliceLength = 0;
for (let i = 0; i < data.length - 1; i++) {
if (data[dir === 'left' ? i : data.length - i - 1].toString() === '0')
sliceLength++;
else
break;
}
data =
dir === 'left'
? data.slice(sliceLength)
: data.slice(0, data.length - sliceLength);
return data;
}
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