*: Modernize and lint; add CI v0.1.17

1 files changed, 39 insertions, 0 deletions

diff --git a/internal/intconv/intconv.go b/internal/intconv/intconv.go
new file mode 100644
index 00000000..8bc77d8e
--- /dev/null
+++ b/internal/intconv/intconv.go
@@ -0,0 +1,39 @@
+// Package intconv provides checked integer conversion helpers.
+package intconv
+
+import (
+	"fmt"
+	"math"
+)
+
+// Uint64ToInt converts v to int, returning an error if it overflows.
+func Uint64ToInt(v uint64) (int, error) {
+	if v > uint64(math.MaxInt) {
+		return 0, fmt.Errorf("intconv: uint64 %d overflows int", v)
+	}
+	return int(v), nil
+}
+
+// UintptrToInt converts v to int, returning an error if it overflows.
+func UintptrToInt(v uintptr) (int, error) {
+	if v > uintptr(math.MaxInt) {
+		return 0, fmt.Errorf("intconv: uintptr %d overflows int", v)
+	}
+	return int(v), nil
+}
+
+// IntToUint64 converts v to uint64, returning an error if v is negative.
+func IntToUint64(v int) (uint64, error) {
+	if v < 0 {
+		return 0, fmt.Errorf("intconv: int %d is negative", v)
+	}
+	return uint64(v), nil
+}
+
+// Int64ToInt32 converts v to int32, returning an error if it overflows.
+func Int64ToInt32(v int64) (int32, error) {
+	if v < math.MinInt32 || v > math.MaxInt32 {
+		return 0, fmt.Errorf("intconv: int64 %d overflows int32", v)
+	}
+	return int32(v), nil
+}