debug: fix (*Architecture).IntN
Change-Id: I68ba29f3a7d06095a779f6b010d74d5ac9008c49
Reviewed-on: https://go-review.googlesource.com/1841
Reviewed-by: Rob Pike <r@golang.org>
diff --git a/ogle/arch/arch.go b/ogle/arch/arch.go
index 90fd5f4..0d5b53e 100644
--- a/ogle/arch/arch.go
+++ b/ogle/arch/arch.go
@@ -66,7 +66,25 @@
}
func (a *Architecture) IntN(buf []byte) int64 {
- return int64(a.UintN(buf))
+ if len(buf) == 0 {
+ return 0
+ }
+ x := int64(0)
+ if a.ByteOrder == binary.LittleEndian {
+ i := len(buf)-1
+ x = int64(int8(buf[i])) // sign-extended
+ for i--; i >= 0; i-- {
+ x <<= 8
+ x |= int64(buf[i]) // not sign-extended
+ }
+ } else {
+ x = int64(int8(buf[0])) // sign-extended
+ for i := 1; i < len(buf); i++ {
+ x <<= 8
+ x |= int64(buf[i]) // not sign-extended
+ }
+ }
+ return x
}
func (a *Architecture) UintN(buf []byte) uint64 {
