mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-12-05 01:52:46 +00:00
57 lines
1.3 KiB
Go
57 lines
1.3 KiB
Go
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package binary
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import (
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"bytes"
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"fmt"
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"github.com/tetratelabs/wazero/api"
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"github.com/tetratelabs/wazero/internal/leb128"
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"github.com/tetratelabs/wazero/internal/wasm"
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)
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func decodeFunctionType(enabledFeatures api.CoreFeatures, r *bytes.Reader, ret *wasm.FunctionType) (err error) {
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b, err := r.ReadByte()
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if err != nil {
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return fmt.Errorf("read leading byte: %w", err)
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}
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if b != 0x60 {
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return fmt.Errorf("%w: %#x != 0x60", ErrInvalidByte, b)
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}
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paramCount, _, err := leb128.DecodeUint32(r)
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if err != nil {
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return fmt.Errorf("could not read parameter count: %w", err)
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}
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paramTypes, err := decodeValueTypes(r, paramCount)
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if err != nil {
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return fmt.Errorf("could not read parameter types: %w", err)
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}
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resultCount, _, err := leb128.DecodeUint32(r)
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if err != nil {
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return fmt.Errorf("could not read result count: %w", err)
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}
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// Guard >1.0 feature multi-value
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if resultCount > 1 {
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if err = enabledFeatures.RequireEnabled(api.CoreFeatureMultiValue); err != nil {
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return fmt.Errorf("multiple result types invalid as %v", err)
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}
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}
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resultTypes, err := decodeValueTypes(r, resultCount)
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if err != nil {
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return fmt.Errorf("could not read result types: %w", err)
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}
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ret.Params = paramTypes
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ret.Results = resultTypes
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// cache the key for the function type
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_ = ret.String()
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return nil
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}
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