Reorganize mammoth lib in rust.

rust/lib/mammoth/src/zion.rs

@@ -0,0 +1,69 @@
+include!("bindings.rs");
+
+use core::fmt;
+
+pub enum ZError {
+    UNKNOWN = 0x0,
+    // First set of error codes generally indicate user errors.
+    INVALID_ARGUMENT = 0x1,
+    NOT_FOUND = 0x2,
+    PERMISSION_DENIED = 0x3,
+    NULL_PTR = 0x4,
+    EMPTY = 0x5,
+    ALREADY_EXISTS = 0x6,
+    BUFFER_SIZE = 0x7,
+    FAILED_PRECONDITION = 0x8,
+
+    // Second set of error codes generally indicate service errors.
+    INTERNAL = 0x100,
+    UNIMPLEMENTED = 0x101,
+    EXHAUSTED = 0x102,
+    INVALID_RESPONSE = 0x103,
+
+    // Kernel specific error codes (relating to capabilities).
+    CAP_NOT_FOUND = 0x1000,
+    CAP_WRONG_TYPE = 0x1001,
+    CAP_PERMISSION_DENIED = 0x1002,
+}
+
+impl From<u64> for ZError {
+    fn from(value: u64) -> Self {
+        match value {
+            0x1 => ZError::INVALID_ARGUMENT,
+            0x2 => ZError::NOT_FOUND,
+            0x3 => ZError::PERMISSION_DENIED,
+            0x4 => ZError::NULL_PTR,
+            0x5 => ZError::EMPTY,
+            0x6 => ZError::ALREADY_EXISTS,
+            0x7 => ZError::BUFFER_SIZE,
+            0x8 => ZError::FAILED_PRECONDITION,
+
+            0x100 => ZError::INTERNAL,
+            0x101 => ZError::UNIMPLEMENTED,
+            0x102 => ZError::EXHAUSTED,
+            0x103 => ZError::INVALID_RESPONSE,
+
+            0x1000 => ZError::CAP_NOT_FOUND,
+            0x1001 => ZError::CAP_WRONG_TYPE,
+            0x1002 => ZError::CAP_PERMISSION_DENIED,
+            _ => ZError::UNKNOWN,
+        }
+    }
+}
+
+impl fmt::Debug for ZError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let str = match self {
+            ZError::INVALID_ARGUMENT => "INVALID_ARGUMENT",
+            ZError::BUFFER_SIZE => "BUFFER_SIZE",
+            ZError::INTERNAL => "INTERNAL",
+            ZError::UNIMPLEMENTED => "UNIMPLEMENTED",
+            ZError::INVALID_RESPONSE => "INVALID_RESPONSE",
+            ZError::CAP_NOT_FOUND => "CAP_NOT_FOUND",
+            ZError::CAP_WRONG_TYPE => "CAP_WRONG_TYPE",
+            ZError::CAP_PERMISSION_DENIED => "CAP_PERMISSION_DENIED",
+            _ => "ZError",
+        };
+        f.write_str(str)
+    }
+}