Function dirnamePosix [src]

Prototype

pub fn dirnamePosix(path: []const u8) ?[]const u8

Parameters

path: []const u8

Example

 test dirnamePosix {
    try testDirnamePosix("/a/b/c", "/a/b");
    try testDirnamePosix("/a/b/c///", "/a/b");
    try testDirnamePosix("/a", "/");
    try testDirnamePosix("/", null);
    try testDirnamePosix("//", null);
    try testDirnamePosix("///", null);
    try testDirnamePosix("////", null);
    try testDirnamePosix("", null);
    try testDirnamePosix("a", null);
    try testDirnamePosix("a/", null);
    try testDirnamePosix("a//", null);
}

Source

  pub fn dirnamePosix(path: []const u8) ?[]const u8 {
    if (path.len == 0)
        return null;

    var end_index: usize = path.len - 1;
    while (path[end_index] == '/') {
        if (end_index == 0)
            return null;
        end_index -= 1;
    }

    while (path[end_index] != '/') {
        if (end_index == 0)
            return null;
        end_index -= 1;
    }

    if (end_index == 0 and path[0] == '/')
        return path[0..1];

    if (end_index == 0)
        return null;

    return path[0..end_index];
}  