package readers import "io" // NewPatternReader creates a reader, that returns a deterministic byte pattern.// After length bytes are readfunc NewPatternReader(length int64) io.Reader { return &patternReader{ length: length, }} type patternReader struct { length int64 c byte} func (r *patternReader) Read(p []byte) (n int, err error) { for i := range p { if r.length <= 0 { return n, io.EOF } p[i] = r.c r.c = (r.c + 1) % 253 r.length-- n++ } return}
package readers
import "io"
// NewPatternReader creates a reader, that returns a deterministic byte pattern.
// After length bytes are read
func NewPatternReader(length int64) io.Reader {
return &patternReader{
length: length,
}
}
type patternReader struct {
length int64
c byte
}
func (r *patternReader) Read(p []byte) (n int, err error) {
for i := range p {
if r.length <= 0 {
return n, io.EOF
}
p[i] = r.c
r.c = (r.c + 1) % 253
r.length--
n++
}
return
}