Function alignBuffer [src]

Prototype

pub fn alignBuffer( w: *Writer, buffer: []const u8, width: usize, alignment: std.fmt.Alignment, fill: u8, ) Error!void

Parameters

w: *Writerbuffer: []const u8width: usizealignment: std.fmt.Alignmentfill: u8

Possible Errors

WriteFailed

See the Writer implementation for detailed diagnostics.

Source

  pub fn alignBuffer(
    w: *Writer,
    buffer: []const u8,
    width: usize,
    alignment: std.fmt.Alignment,
    fill: u8,
) Error!void {
    const padding = if (buffer.len < width) width - buffer.len else 0;
    if (padding == 0) {
        @branchHint(.likely);
        return w.writeAll(buffer);
    }
    switch (alignment) {
        .left => {
            try w.writeAll(buffer);
            try w.splatByteAll(fill, padding);
        },
        .center => {
            const left_padding = padding / 2;
            const right_padding = (padding + 1) / 2;
            try w.splatByteAll(fill, left_padding);
            try w.writeAll(buffer);
            try w.splatByteAll(fill, right_padding);
        },
        .right => {
            try w.splatByteAll(fill, padding);
            try w.writeAll(buffer);
        },
    }
}  