[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, 43 insertions, 0 deletions

diff --git a/vendor/github.com/tetratelabs/wazero/internal/wasm/binary/table.go b/vendor/github.com/tetratelabs/wazero/internal/wasm/binary/table.go
new file mode 100644
index 000000000..353ec7566
--- /dev/null
+++ b/vendor/github.com/tetratelabs/wazero/internal/wasm/binary/table.go
@@ -0,0 +1,43 @@
+package binary
+
+import (
+	"bytes"
+	"fmt"
+
+	"github.com/tetratelabs/wazero/api"
+	"github.com/tetratelabs/wazero/internal/wasm"
+)
+
+// decodeTable returns the wasm.Table decoded with the WebAssembly 1.0 (20191205) Binary Format.
+//
+// See https://www.w3.org/TR/2019/REC-wasm-core-1-20191205/#binary-table
+func decodeTable(r *bytes.Reader, enabledFeatures api.CoreFeatures, ret *wasm.Table) (err error) {
+	ret.Type, err = r.ReadByte()
+	if err != nil {
+		return fmt.Errorf("read leading byte: %v", err)
+	}
+
+	if ret.Type != wasm.RefTypeFuncref {
+		if err = enabledFeatures.RequireEnabled(api.CoreFeatureReferenceTypes); err != nil {
+			return fmt.Errorf("table type funcref is invalid: %w", err)
+		}
+	}
+
+	var shared bool
+	ret.Min, ret.Max, shared, err = decodeLimitsType(r)
+	if err != nil {
+		return fmt.Errorf("read limits: %v", err)
+	}
+	if ret.Min > wasm.MaximumFunctionIndex {
+		return fmt.Errorf("table min must be at most %d", wasm.MaximumFunctionIndex)
+	}
+	if ret.Max != nil {
+		if *ret.Max < ret.Min {
+			return fmt.Errorf("table size minimum must not be greater than maximum")
+		}
+	}
+	if shared {
+		return fmt.Errorf("tables cannot be marked as shared")
+	}
+	return
+}