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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | 68x 16x 16x 16x 16x 16x 16x 16x 16x 16x 16x 16x 16x 16x 16x 16x 16x | export function copy(
currentBuff: Uint8Array,
target: Uint8Array,
targetStart: number,
start?: number,
end?: number
) {
if (!start) start = 0;
if (!end && end !== 0) end = currentBuff.length;
Iif (targetStart >= target.length) targetStart = target.length;
Iif (!targetStart) targetStart = 0;
Iif (end > 0 && end < start) end = start;
// Copy 0 bytes; we're done
Iif (end === start) return 0;
Iif (target.length === 0 || currentBuff.length === 0) return 0;
// Fatal error conditions
Iif (targetStart < 0) {
throw new RangeError('targetStart out of bounds');
}
Iif (start < 0 || start >= currentBuff.length) throw new RangeError('Index out of range');
Iif (end < 0) throw new RangeError('sourceEnd out of bounds');
// Are we oob?
Iif (end > currentBuff.length) end = currentBuff.length;
Iif (target.length - targetStart < end - start) {
end = target.length - targetStart + start;
}
const len = end - start;
Iif (currentBuff === target && typeof Uint8Array.prototype.copyWithin === 'function') {
// Use built-in when available, missing from IE11
currentBuff.copyWithin(targetStart, start, end);
} else {
Uint8Array.prototype.set.call(target, currentBuff.subarray(start, end), targetStart);
}
return len;
}
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