ByteStream Class
Allows the contents of an ArrayBuffer to be consumed sequentially using methods to extract data of a particular type from the bytes beginning at the current read position. Methods and properties beginning with 'read' and taking no arguments consume data at the current read position and advance it by the size of the data read. The read position can also be directly adjusted by the caller.
Methods
| Name | Description | |
|---|---|---|
| constructor(buffer: ArrayBuffer | SharedArrayBuffer, subView?: { byteLength: number, byteOffset: number }): ByteStream | Construct a new ByteStream with the read position set to the beginning. | Deprecated |
| advance(numBytes: number): boolean | Adds the specified number of bytes to the current read position | |
| nextBytes(numBytes: number): Uint8Array | Read the specified number of bytes beginning at the current read position into a Uint8Array and advance by the specified number of byte. | |
| nextUint32s(numUint32s: number): Uint32Array | Read the specified number of unsigned 32-bit integers from the current read position and advance the read position. | |
| readBytes(readPos: number, numBytes: number): Uint8Array | Read the specified number of bytes at the specified offset without changing the read position. | |
| readFloat32(): number | Read a 32-bit floating point number from the current read position and advance by 4 bytes. | |
| readFloat64(): number | Read a 64-bit floating point number from the current read position and advance by 8 bytes. | |
| readId64(): string | Read an unsigned 64-bit integer from the current read position, advance by 8 bytes, and return the 64-bit value as an Id64String. | |
| readInt32(): number | Read a signed 32-bit integer from the current read position and advance by 4 bytes. | |
| readUint16(): number | Read an unsigned 16-bit integer from the current read position and advance by 2 bytes. | |
| readUint24(): number | Read an unsigned 24-bit integer from the current read position and advance by 3 bytes. | |
| readUint32(): number | Read an unsigned 32-bit integer from the current read position and advance by 4 bytes. | |
| readUint8(): number | Read a unsigned 8-bit integer from the current read position and advance by 1 byte. | |
| reset(): void | Resets the current read position to the beginning of the stream | |
| rewind(numBytes: number): boolean | Subtracts the specified number of bytes from the current read position | |
| fromArrayBuffer(buffer: ArrayBuffer | SharedArrayBuffer, subView?: { byteLength: number, byteOffset: number }): ByteStream Static | Construct a new ByteStream with the read position set to the beginning. | |
| fromUint8Array(bytes: Uint8Array): ByteStream Static | Construct a new ByteStream for the range of bytes represented by bytes, which may be a subset of the range of bytes |
Properties
| Name | Type | Description | |
|---|---|---|---|
| arrayBuffer Accessor ReadOnly | ArrayBuffer | SharedArrayBuffer | Returns the underlying array buffer | |
| curPos Accessor | number | The current read position as an index into the stream of bytes. | |
| isAtTheEnd Accessor ReadOnly | boolean | Returns true if the current read position has advanced precisely to the end of the stream, indicating all of the data has been consumed. | |
| isPastTheEnd Accessor ReadOnly | boolean | Returns true if the current read position has been advanced past the end of the stream. | |
| length Accessor ReadOnly | number | The number of bytes in this stream | |
| nextFloat32 Accessor ReadOnly | number | ||
| nextFloat64 Accessor ReadOnly | number | ||
| nextId64 Accessor ReadOnly | string | ||
| nextInt32 Accessor ReadOnly | number | ||
| nextUint16 Accessor ReadOnly | number | ||
| nextUint24 Accessor ReadOnly | number | ||
| nextUint32 Accessor ReadOnly | number | ||
| nextUint8 Accessor ReadOnly | number | ||
| remainingLength Accessor ReadOnly | number | The number of bytes remaining to be read, from ByteStream.curPos to the end of the stream. |
Defined in
- core/bentley/src/ByteStream.ts Line 19
Last Updated: 20 June, 2023