Specify const types to support 32-bit arch

.github/workflows/go.yml

@@ -27,9 +27,32 @@ jobs:
         working-directory: ./${{ matrix.dir }}
         run: |
           go get .
+      - name: go work
+        run: |
+          if [ "${{ matrix.dir }}" == "pkg" ]; then
+            echo "Skipping go workspace for ${{ matrix.dir }}"
+            rm -f go.work*
+            exit 0
+          fi
+          go work init
+          go work use pkg
+          go work use ${{ matrix.dir }}
       - name: Build (${{ matrix.dir }})
         working-directory: ./${{ matrix.dir }}
-        run: go build -v ./...
+        run: |
+          for OSARCH in $(go tool dist list); do
+            case $OSARCH in
+              freebsd*|darwin*|linux*|windows*|wasip*) ;;
+              *) continue ;;
+            esac
+            case $OSARCH in
+              *arm64|*arm|*amd64|*386|*riscv64|*wasm) ;;
+              *) continue ;;
+            esac
+            IFS="/" read -r OS ARCH <<< "$OSARCH"
+            echo "Building for $OS $ARCH"
+            GOOS=$OS GOARCH=$ARCH go build ./...
+          done
       - name: Test (${{ matrix.dir }})
         working-directory: ./${{ matrix.dir }}
         run: go test -v ./...

pkg/encoder.go

@@ -2,7 +2,6 @@
 
 import (
 	"fmt"
-	"math"
 
 	"github.com/cespare/xxhash/v2"
 	"go.uber.org/zap"
@@ -27,9 +26,9 @@
 }
 
 func (s *writerImpl) Encode(src []byte) ([]byte, error) {
-	if len(src) > math.MaxUint32 {
+	if int64(len(src)) > maxChunkSize {
 		return nil, fmt.Errorf("chunk size too big for seekable format: %d > %d",
-			len(src), math.MaxUint32)
+			len(src), maxChunkSize)
 	}
 
 	if len(src) == 0 {
@@ -38,9 +37,9 @@
 
 	dst := s.enc.EncodeAll(src, nil)
 
-	if len(dst) > math.MaxUint32 {
+	if int64(len(dst)) > maxChunkSize {
 		return nil, fmt.Errorf("result size too big for seekable format: %d > %d",
-			len(src), math.MaxUint32)
+			len(src), maxChunkSize)
 	}
 
 	entry := seekTableEntry{
@@ -56,9 +55,9 @@
 }
 
 func (s *writerImpl) EndStream() ([]byte, error) {
-	if len(s.frameEntries) > math.MaxUint32 {
+	if int64(len(s.frameEntries)) > maxNumberOfFrames {
 		return nil, fmt.Errorf("number of frames for seekable format: %d > %d",
-			len(s.frameEntries), math.MaxUint32)
+			len(s.frameEntries), maxNumberOfFrames)
 	}
 
 	seekTable := make([]byte, len(s.frameEntries)*12+9)

pkg/seekable.go

@@ -36,9 +36,9 @@ const (
 
 		https://github.com/facebook/zstd/blob/dev/contrib/seekable_format/zstd_seekable_compression_format.md
 	*/
-	skippableFrameMagic = 0x184D2A50
+	skippableFrameMagic uint32 = 0x184D2A50
 
-	seekableMagicNumber = 0x8F92EAB1
+	seekableMagicNumber uint32 = 0x8F92EAB1
 
 	seekTableFooterOffset = 9
 
@@ -49,6 +49,12 @@ const (
 	maxDecoderFrameSize = 128 << 20
 
 	seekableTag = 0xE
+
+	// maximum size of a single frame
+	maxChunkSize int64 = math.MaxUint32
+
+	// maximum number of frames in a seekable stream
+	maxNumberOfFrames int64 = math.MaxUint32
 )
 
 /*
@@ -234,7 +240,7 @@ func createSkippableFrame(tag uint32, payload []byte) ([]byte, error) {
 		return nil, fmt.Errorf("requested tag (%d) > 0xf", tag)
 	}
 
-	if len(payload) > math.MaxUint32 {
+	if int64(len(payload)) > maxChunkSize {
 		return nil, fmt.Errorf("requested skippable frame size (%d) > max uint32", len(payload))
 	}