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
|
package binary
import (
"bytes"
"fmt"
"github.com/tetratelabs/wazero/api"
"github.com/tetratelabs/wazero/internal/leb128"
"github.com/tetratelabs/wazero/internal/wasm"
)
func decodeImport(
r *bytes.Reader,
idx uint32,
memorySizer memorySizer,
memoryLimitPages uint32,
enabledFeatures api.CoreFeatures,
ret *wasm.Import,
) (err error) {
if ret.Module, _, err = decodeUTF8(r, "import module"); err != nil {
err = fmt.Errorf("import[%d] error decoding module: %w", idx, err)
return
}
if ret.Name, _, err = decodeUTF8(r, "import name"); err != nil {
err = fmt.Errorf("import[%d] error decoding name: %w", idx, err)
return
}
b, err := r.ReadByte()
if err != nil {
err = fmt.Errorf("import[%d] error decoding type: %w", idx, err)
return
}
ret.Type = b
switch ret.Type {
case wasm.ExternTypeFunc:
ret.DescFunc, _, err = leb128.DecodeUint32(r)
case wasm.ExternTypeTable:
err = decodeTable(r, enabledFeatures, &ret.DescTable)
case wasm.ExternTypeMemory:
ret.DescMem, err = decodeMemory(r, enabledFeatures, memorySizer, memoryLimitPages)
case wasm.ExternTypeGlobal:
ret.DescGlobal, err = decodeGlobalType(r)
default:
err = fmt.Errorf("%w: invalid byte for importdesc: %#x", ErrInvalidByte, b)
}
if err != nil {
err = fmt.Errorf("import[%d] %s[%s.%s]: %w", idx, wasm.ExternTypeName(ret.Type), ret.Module, ret.Name, err)
}
return
}
|
