diff options
Diffstat (limited to 'vendor/github.com/aws/aws-sdk-go/aws/types.go')
-rw-r--r-- | vendor/github.com/aws/aws-sdk-go/aws/types.go | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/vendor/github.com/aws/aws-sdk-go/aws/types.go b/vendor/github.com/aws/aws-sdk-go/aws/types.go deleted file mode 100644 index 8b6f234..0000000 --- a/vendor/github.com/aws/aws-sdk-go/aws/types.go +++ /dev/null @@ -1,201 +0,0 @@ -package aws - -import ( - "io" - "sync" - - "github.com/aws/aws-sdk-go/internal/sdkio" -) - -// ReadSeekCloser wraps a io.Reader returning a ReaderSeekerCloser. Should -// only be used with an io.Reader that is also an io.Seeker. Doing so may -// cause request signature errors, or request body's not sent for GET, HEAD -// and DELETE HTTP methods. -// -// Deprecated: Should only be used with io.ReadSeeker. If using for -// S3 PutObject to stream content use s3manager.Uploader instead. -func ReadSeekCloser(r io.Reader) ReaderSeekerCloser { - return ReaderSeekerCloser{r} -} - -// ReaderSeekerCloser represents a reader that can also delegate io.Seeker and -// io.Closer interfaces to the underlying object if they are available. -type ReaderSeekerCloser struct { - r io.Reader -} - -// IsReaderSeekable returns if the underlying reader type can be seeked. A -// io.Reader might not actually be seekable if it is the ReaderSeekerCloser -// type. -func IsReaderSeekable(r io.Reader) bool { - switch v := r.(type) { - case ReaderSeekerCloser: - return v.IsSeeker() - case *ReaderSeekerCloser: - return v.IsSeeker() - case io.ReadSeeker: - return true - default: - return false - } -} - -// Read reads from the reader up to size of p. The number of bytes read, and -// error if it occurred will be returned. -// -// If the reader is not an io.Reader zero bytes read, and nil error will be returned. -// -// Performs the same functionality as io.Reader Read -func (r ReaderSeekerCloser) Read(p []byte) (int, error) { - switch t := r.r.(type) { - case io.Reader: - return t.Read(p) - } - return 0, nil -} - -// Seek sets the offset for the next Read to offset, interpreted according to -// whence: 0 means relative to the origin of the file, 1 means relative to the -// current offset, and 2 means relative to the end. Seek returns the new offset -// and an error, if any. -// -// If the ReaderSeekerCloser is not an io.Seeker nothing will be done. -func (r ReaderSeekerCloser) Seek(offset int64, whence int) (int64, error) { - switch t := r.r.(type) { - case io.Seeker: - return t.Seek(offset, whence) - } - return int64(0), nil -} - -// IsSeeker returns if the underlying reader is also a seeker. -func (r ReaderSeekerCloser) IsSeeker() bool { - _, ok := r.r.(io.Seeker) - return ok -} - -// HasLen returns the length of the underlying reader if the value implements -// the Len() int method. -func (r ReaderSeekerCloser) HasLen() (int, bool) { - type lenner interface { - Len() int - } - - if lr, ok := r.r.(lenner); ok { - return lr.Len(), true - } - - return 0, false -} - -// GetLen returns the length of the bytes remaining in the underlying reader. -// Checks first for Len(), then io.Seeker to determine the size of the -// underlying reader. -// -// Will return -1 if the length cannot be determined. -func (r ReaderSeekerCloser) GetLen() (int64, error) { - if l, ok := r.HasLen(); ok { - return int64(l), nil - } - - if s, ok := r.r.(io.Seeker); ok { - return seekerLen(s) - } - - return -1, nil -} - -// SeekerLen attempts to get the number of bytes remaining at the seeker's -// current position. Returns the number of bytes remaining or error. -func SeekerLen(s io.Seeker) (int64, error) { - // Determine if the seeker is actually seekable. ReaderSeekerCloser - // hides the fact that a io.Readers might not actually be seekable. - switch v := s.(type) { - case ReaderSeekerCloser: - return v.GetLen() - case *ReaderSeekerCloser: - return v.GetLen() - } - - return seekerLen(s) -} - -func seekerLen(s io.Seeker) (int64, error) { - curOffset, err := s.Seek(0, sdkio.SeekCurrent) - if err != nil { - return 0, err - } - - endOffset, err := s.Seek(0, sdkio.SeekEnd) - if err != nil { - return 0, err - } - - _, err = s.Seek(curOffset, sdkio.SeekStart) - if err != nil { - return 0, err - } - - return endOffset - curOffset, nil -} - -// Close closes the ReaderSeekerCloser. -// -// If the ReaderSeekerCloser is not an io.Closer nothing will be done. -func (r ReaderSeekerCloser) Close() error { - switch t := r.r.(type) { - case io.Closer: - return t.Close() - } - return nil -} - -// A WriteAtBuffer provides a in memory buffer supporting the io.WriterAt interface -// Can be used with the s3manager.Downloader to download content to a buffer -// in memory. Safe to use concurrently. -type WriteAtBuffer struct { - buf []byte - m sync.Mutex - - // GrowthCoeff defines the growth rate of the internal buffer. By - // default, the growth rate is 1, where expanding the internal - // buffer will allocate only enough capacity to fit the new expected - // length. - GrowthCoeff float64 -} - -// NewWriteAtBuffer creates a WriteAtBuffer with an internal buffer -// provided by buf. -func NewWriteAtBuffer(buf []byte) *WriteAtBuffer { - return &WriteAtBuffer{buf: buf} -} - -// WriteAt writes a slice of bytes to a buffer starting at the position provided -// The number of bytes written will be returned, or error. Can overwrite previous -// written slices if the write ats overlap. -func (b *WriteAtBuffer) WriteAt(p []byte, pos int64) (n int, err error) { - pLen := len(p) - expLen := pos + int64(pLen) - b.m.Lock() - defer b.m.Unlock() - if int64(len(b.buf)) < expLen { - if int64(cap(b.buf)) < expLen { - if b.GrowthCoeff < 1 { - b.GrowthCoeff = 1 - } - newBuf := make([]byte, expLen, int64(b.GrowthCoeff*float64(expLen))) - copy(newBuf, b.buf) - b.buf = newBuf - } - b.buf = b.buf[:expLen] - } - copy(b.buf[pos:], p) - return pLen, nil -} - -// Bytes returns a slice of bytes written to the buffer. -func (b *WriteAtBuffer) Bytes() []byte { - b.m.Lock() - defer b.m.Unlock() - return b.buf -} |