putWindowsBlock

    pub fn putWindowsBlock(map: *Map, view: WindowsBlock.View) Allocator.Error!void {
        var i: usize = 0;
        while (view.ptr[i] != 0) {
            const key_start = i;

            // There are some special environment variables that start with =,
            // so we need a special case to not treat = as a key/value separator
            // if it's the first character.
            // https://devblogs.microsoft.com/oldnewthing/20100506-00/?p=14133
            if (view.ptr[key_start] == '=') i += 1;

            while (view.ptr[i] != 0 and view.ptr[i] != '=') : (i += 1) {}
            const key_w = view.ptr[key_start..i];
            const key = try unicode.wtf16LeToWtf8Alloc(map.allocator, key_w);
            errdefer map.allocator.free(key);

            if (view.ptr[i] == '=') i += 1;

            const value_start = i;
            while (view.ptr[i] != 0) : (i += 1) {}
            const value_w = view.ptr[value_start..i];
            const value = try unicode.wtf16LeToWtf8Alloc(map.allocator, value_w);
            errdefer map.allocator.free(value);

            i += 1; // skip over null byte

            try map.putMove(key, value);
        }
    }