1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
use core::fmt::Debug;

newtype_enum! {
/// UEFI uses status codes in order to report successes, errors, and warnings.
///
/// The spec allows implementation-specific status codes, so the `Status`
/// constants are not a comprehensive list of all possible values.
#[must_use]
pub enum Status: usize => {
    /// The operation completed successfully.
    SUCCESS                 =  0,

    /// The string contained characters that could not be rendered and were skipped.
    WARN_UNKNOWN_GLYPH      =  1,
    /// The handle was closed, but the file was not deleted.
    WARN_DELETE_FAILURE     =  2,
    /// The handle was closed, but the data to the file was not flushed properly.
    WARN_WRITE_FAILURE      =  3,
    /// The resulting buffer was too small, and the data was truncated.
    WARN_BUFFER_TOO_SMALL   =  4,
    /// The data has not been updated within the timeframe set by local policy.
    WARN_STALE_DATA         =  5,
    /// The resulting buffer contains UEFI-compliant file system.
    WARN_FILE_SYSTEM        =  6,
    /// The operation will be processed across a system reset.
    WARN_RESET_REQUIRED     =  7,

    /// The image failed to load.
    LOAD_ERROR              = Self::ERROR_BIT |  1,
    /// A parameter was incorrect.
    INVALID_PARAMETER       = Self::ERROR_BIT |  2,
    /// The operation is not supported.
    UNSUPPORTED             = Self::ERROR_BIT |  3,
    /// The buffer was not the proper size for the request.
    BAD_BUFFER_SIZE         = Self::ERROR_BIT |  4,
    /// The buffer is not large enough to hold the requested data.
    /// The required buffer size is returned in the appropriate parameter.
    BUFFER_TOO_SMALL        = Self::ERROR_BIT |  5,
    /// There is no data pending upon return.
    NOT_READY               = Self::ERROR_BIT |  6,
    /// The physical device reported an error while attempting the operation.
    DEVICE_ERROR            = Self::ERROR_BIT |  7,
    /// The device cannot be written to.
    WRITE_PROTECTED         = Self::ERROR_BIT |  8,
    /// A resource has run out.
    OUT_OF_RESOURCES        = Self::ERROR_BIT |  9,
    /// An inconstency was detected on the file system.
    VOLUME_CORRUPTED        = Self::ERROR_BIT | 10,
    /// There is no more space on the file system.
    VOLUME_FULL             = Self::ERROR_BIT | 11,
    /// The device does not contain any medium to perform the operation.
    NO_MEDIA                = Self::ERROR_BIT | 12,
    /// The medium in the device has changed since the last access.
    MEDIA_CHANGED           = Self::ERROR_BIT | 13,
    /// The item was not found.
    NOT_FOUND               = Self::ERROR_BIT | 14,
    /// Access was denied.
    ACCESS_DENIED           = Self::ERROR_BIT | 15,
    /// The server was not found or did not respond to the request.
    NO_RESPONSE             = Self::ERROR_BIT | 16,
    /// A mapping to a device does not exist.
    NO_MAPPING              = Self::ERROR_BIT | 17,
    /// The timeout time expired.
    TIMEOUT                 = Self::ERROR_BIT | 18,
    /// The protocol has not been started.
    NOT_STARTED             = Self::ERROR_BIT | 19,
    /// The protocol has already been started.
    ALREADY_STARTED         = Self::ERROR_BIT | 20,
    /// The operation was aborted.
    ABORTED                 = Self::ERROR_BIT | 21,
    /// An ICMP error occurred during the network operation.
    ICMP_ERROR              = Self::ERROR_BIT | 22,
    /// A TFTP error occurred during the network operation.
    TFTP_ERROR              = Self::ERROR_BIT | 23,
    /// A protocol error occurred during the network operation.
    PROTOCOL_ERROR          = Self::ERROR_BIT | 24,
    /// The function encountered an internal version that was
    /// incompatible with a version requested by the caller.
    INCOMPATIBLE_VERSION    = Self::ERROR_BIT | 25,
    /// The function was not performed due to a security violation.
    SECURITY_VIOLATION      = Self::ERROR_BIT | 26,
    /// A CRC error was detected.
    CRC_ERROR               = Self::ERROR_BIT | 27,
    /// Beginning or end of media was reached
    END_OF_MEDIA            = Self::ERROR_BIT | 28,
    /// The end of the file was reached.
    END_OF_FILE             = Self::ERROR_BIT | 31,
    /// The language specified was invalid.
    INVALID_LANGUAGE        = Self::ERROR_BIT | 32,
    /// The security status of the data is unknown or compromised and
    /// the data must be updated or replaced to restore a valid security status.
    COMPROMISED_DATA        = Self::ERROR_BIT | 33,
    /// There is an address conflict address allocation
    IP_ADDRESS_CONFLICT     = Self::ERROR_BIT | 34,
    /// A HTTP error occurred during the network operation.
    HTTP_ERROR              = Self::ERROR_BIT | 35,
}}

impl Status {
    /// Bit indicating that an UEFI status code is an error.
    pub const ERROR_BIT: usize = 1 << (core::mem::size_of::<usize>() * 8 - 1);

    /// Returns true if status code indicates success.
    #[inline]
    #[must_use]
    pub fn is_success(self) -> bool {
        self == Self::SUCCESS
    }

    /// Returns true if status code indicates a warning.
    #[inline]
    #[must_use]
    pub fn is_warning(self) -> bool {
        (self != Self::SUCCESS) && (self.0 & Self::ERROR_BIT == 0)
    }

    /// Returns true if the status code indicates an error.
    #[inline]
    #[must_use]
    pub const fn is_error(self) -> bool {
        self.0 & Self::ERROR_BIT != 0
    }
}

impl core::fmt::Display for Status {
    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
        Debug::fmt(self, f)
    }
}