const std = @import("std"); const reserved_chars = &[_]u8{ '!', '#', '$', '%', '&', '\'', '(', ')', '*', '+', ',', ':', ';', '=', '?', '@', '[', ']', }; /// Returns a URI from a path, caller owns the memory allocated with `allocator` pub fn fromPath(allocator: *std.mem.Allocator, path: []const u8) ![]const u8 { if (path.len == 0) return ""; const prefix = if (std.builtin.os.tag == .windows) "file:///" else "file://"; var buf = std.ArrayList(u8).init(allocator); try buf.appendSlice(prefix); const out_stream = buf.outStream(); for (path) |char| { if (char == std.fs.path.sep) { try buf.append('/'); } else if (std.mem.indexOfScalar(u8, reserved_chars, char) != null) { // Write '%' + hex with uppercase try buf.append('%'); try std.fmt.format(out_stream, "{X}", .{char}); } else { try buf.append(char); } } // On windows, we need to lowercase the drive name. if (std.builtin.os.tag == .windows) { if (buf.items.len > prefix.len + 1 and std.ascii.isAlpha(buf.items[prefix.len]) and std.mem.startsWith(u8, buf.items[prefix.len + 1 ..], "%3A")) { buf.items[prefix.len] = std.ascii.toLower(buf.items[prefix.len]); } } return buf.toOwnedSlice(); } // Original code: https://github.com/andersfr/zig-lsp/blob/master/uri.zig fn parseHex(c: u8) !u8 { return switch (c) { '0'...'9' => c - '0', 'a'...'f' => c - 'a' + 10, 'A'...'F' => c - 'A' + 10, else => return error.UriBadHexChar, }; } /// Caller should free memory pub fn parse(allocator: *std.mem.Allocator, str: []const u8) ![]u8 { if (str.len < 7 or !std.mem.eql(u8, "file://", str[0..7])) return error.UriBadScheme; const uri = try allocator.alloc(u8, str.len - (if (std.fs.path.sep == '\\') 8 else 7)); errdefer allocator.free(uri); const path = if (std.fs.path.sep == '\\') str[8..] else str[7..]; var i: usize = 0; var j: usize = 0; while (j < path.len) : (i += 1) { if (path[j] == '%') { if (j + 2 >= path.len) return error.UriBadEscape; const upper = try parseHex(path[j + 1]); const lower = try parseHex(path[j + 2]); uri[i] = (upper << 4) + lower; j += 3; } else { uri[i] = if (path[j] == '/') std.fs.path.sep else path[j]; j += 1; } } // Remove trailing separator if (i > 0 and uri[i - 1] == std.fs.path.sep) { i -= 1; } return allocator.shrink(uri, i); }