1 files changed, 112 insertions, 0 deletions

diff --git a/vendor/github.com/zclconf/go-cty/cty/function/stdlib/bytes.go b/vendor/github.com/zclconf/go-cty/cty/function/stdlib/bytes.go
new file mode 100644
index 0000000..a132e0c
--- /dev/null
+++ b/vendor/github.com/zclconf/go-cty/cty/function/stdlib/bytes.go
@@ -0,0 +1,112 @@
+package stdlib
+
+import (
+        "fmt"
+        "reflect"
+
+        "github.com/zclconf/go-cty/cty"
+        "github.com/zclconf/go-cty/cty/function"
+        "github.com/zclconf/go-cty/cty/gocty"
+)
+
+// Bytes is a capsule type that can be used with the binary functions to
+// support applications that need to support raw buffers in addition to
+// UTF-8 strings.
+var Bytes = cty.Capsule("bytes", reflect.TypeOf([]byte(nil)))
+
+// BytesVal creates a new Bytes value from the given buffer, which must be
+// non-nil or this function will panic.
+//
+// Once a byte slice has been wrapped in a Bytes capsule, its underlying array
+// must be considered immutable.
+func BytesVal(buf []byte) cty.Value {
+        if buf == nil {
+                panic("can't make Bytes value from nil slice")
+        }
+
+        return cty.CapsuleVal(Bytes, &buf)
+}
+
+// BytesLen is a Function that returns the length of the buffer encapsulated
+// in a Bytes value.
+var BytesLenFunc = function.New(&function.Spec{
+        Params: []function.Parameter{
+                {
+                        Name:             "buf",
+                        Type:             Bytes,
+                        AllowDynamicType: true,
+                },
+        },
+        Type: function.StaticReturnType(cty.Number),
+        Impl: func(args []cty.Value, retType cty.Type) (cty.Value, error) {
+                bufPtr := args[0].EncapsulatedValue().(*[]byte)
+                return cty.NumberIntVal(int64(len(*bufPtr))), nil
+        },
+})
+
+// BytesSlice is a Function that returns a slice of the given Bytes value.
+var BytesSliceFunc = function.New(&function.Spec{
+        Params: []function.Parameter{
+                {
+                        Name:             "buf",
+                        Type:             Bytes,
+                        AllowDynamicType: true,
+                },
+                {
+                        Name:             "offset",
+                        Type:             cty.Number,
+                        AllowDynamicType: true,
+                },
+                {
+                        Name:             "length",
+                        Type:             cty.Number,
+                        AllowDynamicType: true,
+                },
+        },
+        Type: function.StaticReturnType(Bytes),
+        Impl: func(args []cty.Value, retType cty.Type) (cty.Value, error) {
+                bufPtr := args[0].EncapsulatedValue().(*[]byte)
+
+                var offset, length int
+
+                var err error
+                err = gocty.FromCtyValue(args[1], &offset)
+                if err != nil {
+                        return cty.NilVal, err
+                }
+                err = gocty.FromCtyValue(args[2], &length)
+                if err != nil {
+                        return cty.NilVal, err
+                }
+
+                if offset < 0 || length < 0 {
+                        return cty.NilVal, fmt.Errorf("offset and length must be non-negative")
+                }
+
+                if offset > len(*bufPtr) {
+                        return cty.NilVal, fmt.Errorf(
+                                "offset %d is greater than total buffer length %d",
+                                offset, len(*bufPtr),
+                        )
+                }
+
+                end := offset + length
+
+                if end > len(*bufPtr) {
+                        return cty.NilVal, fmt.Errorf(
+                                "offset %d + length %d is greater than total buffer length %d",
+                                offset, length, len(*bufPtr),
+                        )
+                }
+
+                return BytesVal((*bufPtr)[offset:end]), nil
+        },
+})
+
+func BytesLen(buf cty.Value) (cty.Value, error) {
+        return BytesLenFunc.Call([]cty.Value{buf})
+}
+
+func BytesSlice(buf cty.Value, offset cty.Value, length cty.Value) (cty.Value, error) {
+        return BytesSliceFunc.Call([]cty.Value{buf, offset, length})
+}