| Commit message (Collapse) | Author | Age |
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The request and response structs for a command should not be bigger than
the buffer they are read from or written to. Therefore we add
assertions that enforce this property at compile time.
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To increase type safety, we use references to (sized) arrays instead of
slices where possible.
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By providing a custom Serialize implementation, we make sure that enum
variants are not mapped to their index, but to their discriminant. This
allows us to use serde when preparing the response packet.
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The execute_raw method does not have to be part of the Command trait.
In order to simplify the Command trait and to make future changes
easier, we remove the execute_raw method and replace it with the execute
function.
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This patch refactors the command execution. A command is represented by
a struct implementing the Command trait. The enum_cmd macro is used to
generate a mapping from the CommandId enum to a Command instance and to
execute the command. The request and response data is manually
converted from and to raw byte slices.
As we do not have a standard library, we cannot create a Box<Command>
from a CommandId. Instead, we directly delegate the execute method to
the corresponding Command.
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We need several enums that map to a u8 value. This patch adds the
enum_u8 macro that automatically derives the From and TryFrom macros for
an enum to make these conversions easier.
As TryFrom is not stable yet, we add our own TryFrom trait.
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