setPath
Function parameters
Parameters
- w:*Header
- prefix:[]const u8
- sub_path:[]const u8
Options for writing file/dir/link.
Types
Sets prefix for all other write* method paths.
Functions
- setRoot
- Sets prefix for all other write* method paths.
- writeFileStream
- Writes file reading file content from `reader`.
- writeFileBytes
- Writes file using bytes buffer `content` for size and file content.
- finishPedantically
- According to the specification, tar should finish with two zero blocks, but
Error sets in this namespace
Error Sets
Source
Implementation
pub fn setPath(w: *Header, prefix: []const u8, sub_path: []const u8) !void {
const max_prefix = w.prefix.len;
const max_name = w.name.len;
const sep = std.fs.path.sep_posix;
if (prefix.len + sub_path.len > max_name + max_prefix or prefix.len > max_prefix)
return error.NameTooLong;
// both fit into name
if (prefix.len > 0 and prefix.len + sub_path.len < max_name) {
@memcpy(w.name[0..prefix.len], prefix);
w.name[prefix.len] = sep;
@memcpy(w.name[prefix.len + 1 ..][0..sub_path.len], sub_path);
return;
}
// sub_path fits into name
// there is no prefix or prefix fits into prefix
if (sub_path.len <= max_name) {
@memcpy(w.name[0..sub_path.len], sub_path);
@memcpy(w.prefix[0..prefix.len], prefix);
return;
}
if (prefix.len > 0) {
@memcpy(w.prefix[0..prefix.len], prefix);
w.prefix[prefix.len] = sep;
}
const prefix_pos = if (prefix.len > 0) prefix.len + 1 else 0;
// add as much to prefix as you can, must split at /
const prefix_remaining = max_prefix - prefix_pos;
if (std.mem.lastIndexOf(u8, sub_path[0..@min(prefix_remaining, sub_path.len)], &.{'/'})) |sep_pos| {
@memcpy(w.prefix[prefix_pos..][0..sep_pos], sub_path[0..sep_pos]);
if ((sub_path.len - sep_pos - 1) > max_name) return error.NameTooLong;
@memcpy(w.name[0..][0 .. sub_path.len - sep_pos - 1], sub_path[sep_pos + 1 ..]);
return;
}
return error.NameTooLong;
}