diff options
Diffstat (limited to 'vendor/github.com/Azure/azure-storage-blob-go/2018-03-28/azblob/zc_util_validate.go')
-rw-r--r-- | vendor/github.com/Azure/azure-storage-blob-go/2018-03-28/azblob/zc_util_validate.go | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/vendor/github.com/Azure/azure-storage-blob-go/2018-03-28/azblob/zc_util_validate.go b/vendor/github.com/Azure/azure-storage-blob-go/2018-03-28/azblob/zc_util_validate.go new file mode 100644 index 000000000..001a21c69 --- /dev/null +++ b/vendor/github.com/Azure/azure-storage-blob-go/2018-03-28/azblob/zc_util_validate.go @@ -0,0 +1,61 @@ +package azblob + +import ( + "errors" + "fmt" + "io" + "strconv" +) + +// httpRange defines a range of bytes within an HTTP resource, starting at offset and +// ending at offset+count. A zero-value httpRange indicates the entire resource. An httpRange +// which has an offset but na zero value count indicates from the offset to the resource's end. +type httpRange struct { + offset int64 + count int64 +} + +func (r httpRange) pointers() *string { + if r.offset == 0 && r.count == 0 { // Do common case first for performance + return nil // No specified range + } + if r.offset < 0 { + panic("The range offset must be >= 0") + } + if r.count < 0 { + panic("The range count must be >= 0") + } + endOffset := "" // if count == 0 + if r.count > 0 { + endOffset = strconv.FormatInt((r.offset+r.count)-1, 10) + } + dataRange := fmt.Sprintf("bytes=%v-%s", r.offset, endOffset) + return &dataRange +} + +//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +func validateSeekableStreamAt0AndGetCount(body io.ReadSeeker) int64 { + if body == nil { // nil body's are "logically" seekable to 0 and are 0 bytes long + return 0 + } + validateSeekableStreamAt0(body) + count, err := body.Seek(0, io.SeekEnd) + if err != nil { + panic("failed to seek stream") + } + body.Seek(0, io.SeekStart) + return count +} + +func validateSeekableStreamAt0(body io.ReadSeeker) { + if body == nil { // nil body's are "logically" seekable to 0 + return + } + if pos, err := body.Seek(0, io.SeekCurrent); pos != 0 || err != nil { + if err != nil { + panic(err) + } + panic(errors.New("stream must be set to position 0")) + } +} |