Caleb J. Gardner
21 lines
498 B
Zig
21 lines
498 B
Zig
//! A File where it's meaningful (to us) content starts at a given offset.
|
|
|
|
const std = @import("std");
|
|
const File = std.fs.File;
|
|
const Reader = std.fs.File.Reader;
|
|
|
|
const OffsetFile = @This();
|
|
|
|
fil: File,
|
|
offset: u64,
|
|
|
|
pub fn init(fil: File, init_offset: u64) OffsetFile {
|
|
return .{ .fil = fil, .offset = init_offset };
|
|
}
|
|
|
|
pub fn readerAt(self: OffsetFile, offset: u64, buffer: []u8) !Reader {
|
|
var rdr = self.fil.reader(buffer);
|
|
try rdr.seekTo(self.offset + offset);
|
|
return rdr;
|
|
}
|