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mist
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a misty Gleam web server
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src/mist/internal/buffer.gleam
import gleam/bit_array
import gleam/int
pub type Buffer {
Buffer(remaining: Int, data: BitArray)
}
pub fn empty() -> Buffer {
Buffer(remaining: 0, data: <<>>)
}
pub fn new(data: BitArray) -> Buffer {
Buffer(remaining: 0, data: data)
}
pub fn append(buffer: Buffer, data: BitArray) -> Buffer {
let data_size = bit_array.byte_size(data)
let remaining = int.max(buffer.remaining - data_size, 0)
Buffer(data: <<buffer.data:bits, data:bits>>, remaining: remaining)
}
pub fn slice(buffer: Buffer, bits: Int) -> #(BitArray, BitArray) {
let bytes = bits * 8
case buffer.data {
<<value:bits-size(bytes), rest:bits>> -> #(value, rest)
_ -> #(buffer.data, <<>>)
}
}
pub fn with_capacity(buffer: Buffer, size: Int) -> Buffer {
Buffer(..buffer, remaining: size)
}
pub fn size(remaining: Int) -> Buffer {
Buffer(data: <<>>, remaining: remaining)
}