LineNumberProgram

const LineNumberProgram = struct {
    address: u64,
    file: usize,
    line: i64,
    column: u64,
    version: u16,
    is_stmt: bool,
    basic_block: bool,

    default_is_stmt: bool,

    // Reset the state machine following the DWARF specification
    pub fn reset(self: *LineNumberProgram) void {
        self.address = 0;
        self.file = 1;
        self.line = 1;
        self.column = 0;
        self.is_stmt = self.default_is_stmt;
        self.basic_block = false;
    }

    pub fn init(is_stmt: bool, version: u16) LineNumberProgram {
        return .{
            .address = 0,
            .file = 1,
            .line = 1,
            .column = 0,
            .version = version,
            .is_stmt = is_stmt,
            .basic_block = false,
            .default_is_stmt = is_stmt,
        };
    }

    pub fn addRow(prog: *LineNumberProgram, gpa: Allocator, table: *CompileUnit.SrcLocCache.LineTable) !void {
        if (prog.line == 0) {
            //if (debug_debug_mode) @panic("garbage line data");
            return;
        }
        if (debug_debug_mode) assert(!table.contains(prog.address));
        try table.put(gpa, prog.address, .{
            .line = cast(u32, prog.line) orelse maxInt(u32),
            .column = cast(u32, prog.column) orelse maxInt(u32),
            .file = cast(u32, prog.file) orelse return bad(),
        });
    }
}