[experiment] add alternative wasm sqlite3 implementation available via build-tag (#2863)

This allows for building GoToSocial with [SQLite transpiled to WASM](https://github.com/ncruces/go-sqlite3) and accessed through [Wazero](https://wazero.io/).

1 files changed, 52 insertions, 0 deletions

diff --git a/vendor/github.com/tetratelabs/wazero/internal/wasm/binary/import.go b/vendor/github.com/tetratelabs/wazero/internal/wasm/binary/import.go
new file mode 100644
index 000000000..39d310c55
--- /dev/null
+++ b/vendor/github.com/tetratelabs/wazero/internal/wasm/binary/import.go
@@ -0,0 +1,52 @@
+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
+}