Buffer

Buffer

object Buffer 

Read and write data to a string Buffer

init

static fun init(int capacity = 0) > Buffer

Create a Buffer

• capacity: Optional initial capacity of the Buffer

Returns: New Buffer

fromStr

static fun fromStr(str string) > Buffer

Create a Buffer with string as its initial value

• string: Initial value

Returns: New Buffer

collect

fun collect() > void

Free underlying memory (automatically called by the Garbage Collector)

read

fun read(int n = 1) > str?

Read bytes

• n: How many bytes to read

Returns: Binary string

write

fun write(str bytes) > void !> WriteWhileReadingError

Write bytes

• bytes: Bytes to write

writeZ

fun writeZ::<T>(str zigType, [T] values) > void !> WriteWhileReadingError, FFITypeMismatchError

Write values to the Buffer checking that T matches the zig type specified by zigType

• zigType: Zig type (must match C ABI)
• values: Values to write

writeZAt

fun writeZAt::<T>(int at, str zigType, [T] values) > void !> WriteWhileReadingError, FFITypeMismatchError

Write values to the Buffer at index at, checking that T matches the zig type specified by zigType

• at: Where to write the data in the Buffer
• zigType: Zig type (must match C ABI)
• values: Values to write

readZ

fun readZ::<T>(str zigType) > T !> FFITypeMismatchError

Read data from the Buffer checking that T matches the zig type specified by zigType

• zigType: Zig type (must match C ABI)

Returns: Data read of buzz type T and zig type zigType

readZAt

fun readZAt::<T>(int at, str zigType) > T !> FFITypeMismatchError

Read data from the Buffer at index at, checking that T matches the zig type specified by zigType

• at: Where to read the data in the Buffer
• zigType: Zig type (must match C ABI)

Returns: Data read of buzz type T and zig type zigType

writeStruct

fun writeStruct::<T>(type structType, [T] values) > void !> WriteWhileReadingError, FFITypeMismatchError

Write foreign struct(s) of type T to the Buffer. The struct type is specified both for the compiler with generic type T and to the function with structType which will be used to know the specific layout and size of the struct.

• structType: Struct type
• values: Values to write

writeStructAt

fun writeStructAt::<T>(type structType, int at, [T] values) > void !> WriteWhileReadingError, FFITypeMismatchError

Write foreign struct(s) of type T to the Buffer at index at. The struct type is specified both for the compiler with generic type T and to the function with structType which will be used to know the specific layout and size of the struct.

• structType: Struct type
• at: Where to write the data to the Buffer
• values: Values to write

readStruct

fun readStruct::<T>(type structType) > T !> FFITypeMismatchError

Read foreign struct of type T from the Buffer. The struct type is specified both for the compiler with generic type T and to the function with structType which will be used to know the specific layout and size of the struct.

• structType: Struct type

Returns: Value read

readStructAt

fun readStructAt::<T>(type structType, int at) > T !> FFITypeMismatchError

Read foreign struct of type T from the Buffer at index at. The struct type is specified both for the compiler with generic type T and to the function with structType which will be used to know the specific layout and size of the struct.

• structType: Struct type

Returns: Value read

readBoolean

fun readBoolean() > bool?

Read a boolean

Returns: Boolean read

writeBoolean

fun writeBoolean(bool boolean) > void !> WriteWhileReadingError

Write a boolean

• boolean: Boolean to write

readInt

fun readInt() > int?

Read a integer

Returns: Integer read

writeInt

fun writeInt(int number) > void !> WriteWhileReadingError

Write an integer

• number: Integer to write

readUserData

fun readUserData() > ud?

Read a ud

Returns: ud read

writeUserData

fun writeUserData(ud userdata) > void !> WriteWhileReadingError

Write an ud

• userdata: ud to write

readDouble

fun readDouble() > double?

Read a double

Returns: Double read

writeDouble

fun writeDouble(double number) > void !> WriteWhileReadingError

Write an double

• number: Double to write

len

fun len(int align = 1) > int

Get Buffer length

• align: Alignement

Returns: Buffer length

cursor

fun cursor() > int

Get current position in the Buffer

Returns: Current position

empty

fun empty() > void

Empty the Buffer (retains capacity)

ptr

fun ptr(int at = 0, int align = 1) > ud

Returns pointer at at * align in the Buffer as userdata

• at: From where to get the pointer
• align: Alignment

Returns: Pointer

toString

fun toString() > str

Get Buffer content as a string

Returns: Buffer content

at

fun at(int index) > int !> OutOfBoundError

Get byte at given index

• index: Which byte to get

Returns: Byte

setAt

fun setAt(int index, int value) > void !> WriteWhileReadingError, OutOfBoundError

Set byte at given index

• index: Which byte to set
• value: Value to set