1 package binary
2
3 import (
4 "bytes"
5 "fmt"
6
7 "github.com/tetratelabs/wazero/internal/leb128"
8 "github.com/tetratelabs/wazero/internal/wasm"
9 )
10
11 func decodeExport(r *bytes.Reader, ret *wasm.Export) (err error) {
12 if ret.Name, _, err = decodeUTF8(r, "export name"); err != nil {
13 return
14 }
15
16 b, err := r.ReadByte()
17 if err != nil {
18 err = fmt.Errorf("error decoding export kind: %w", err)
19 return
20 }
21
22 ret.Type = b
23 switch ret.Type {
24 case wasm.ExternTypeFunc, wasm.ExternTypeTable, wasm.ExternTypeMemory, wasm.ExternTypeGlobal:
25 if ret.Index, _, err = leb128.DecodeUint32(r); err != nil {
26 err = fmt.Errorf("error decoding export index: %w", err)
27 }
28 default:
29 err = fmt.Errorf("%w: invalid byte for exportdesc: %#x", ErrInvalidByte, b)
30 }
31 return
32 }
33
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