Zig 0.17.0-dev (Split by item)

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prependSlice

ArrayListReverse.prependSlice

pub fn prependSlice(self: *ArrayListReverse, data: []const u8) Error!void

File

lib/std/crypto/codecs/asn1/der/ArrayListReverse.zig:40

Code

pub fn prependSlice(self: *ArrayListReverse, data: []const u8) Error!void {
    try self.ensureCapacity(self.data.len + data.len);
    const old_len = self.data.len;
    const new_len = old_len + data.len;
    assert(new_len <= self.capacity);
    self.data.len = new_len;

    const end = self.data.ptr;
    const begin = end - data.len;
    const slice = begin[0..data.len];
    @memcpy(slice, data);
    self.data.ptr = begin;
}