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sparc.go
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/
sparc.go
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package bra
import (
"encoding/binary"
"io"
)
const sparcAlignment = 4
type sparc struct {
ip uint32
}
func (c *sparc) Size() int { return sparcAlignment }
func (c *sparc) Convert(b []byte, encoding bool) int {
if len(b) < c.Size() {
return 0
}
var i int
for i = 0; i < len(b) & ^(sparcAlignment-1); i += sparcAlignment {
v := binary.BigEndian.Uint32(b[i:])
if (b[i+0] == 0x40 && b[i+1]&0xc0 == 0) || (b[i+0] == 0x7f && b[i+1] >= 0xc0) {
v <<= 2
if encoding {
v += c.ip
} else {
v -= c.ip
}
v &= 0x01ffffff
v -= uint32(1) << 24
v ^= 0xff000000
v >>= 2
v |= 0x40000000
}
c.ip += uint32(sparcAlignment)
binary.BigEndian.PutUint32(b[i:], v)
}
return i
}
// NewSPARCReader returns a new SPARC io.ReadCloser.
func NewSPARCReader(_ []byte, _ uint64, readers []io.ReadCloser) (io.ReadCloser, error) {
return newReader(readers, new(sparc))
}