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suffixarray: cleanup per suggestion from Roger Peppe

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R=rsc
CC=golang-dev
https://golang.org/cl/2213045
This commit is contained in:
Robert Griesemer 2010-09-22 11:03:57 -07:00
parent ad9042bdfa
commit 3487495eb0
1 changed files with 6 additions and 12 deletions
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18
src/pkg/index/suffixarray/suffixarray.go
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@ -43,9 +43,9 @@ func New(data []byte) *Index {
for i, _ := range sa { for i, _ := range sa {
sa[i] = i sa[i] = i
} }
x := &index{data, sa} x := &Index{data, sa}
sort.Sort(x) sort.Sort((*index)(x))
return (*Index)(x) return x
} }
@ -75,7 +75,7 @@ func (x *Index) search(s []byte) int {
// Lookup returns an unsorted list of at most n indices where the byte string s // Lookup returns an unsorted list of at most n indices where the byte string s
// occurs in the indexed data. If n < 0, all occurrences are returned. // occurs in the indexed data. If n < 0, all occurrences are returned.
// The result is nil if s is empty, s is not found, or n == 0. // The result is nil if s is empty, s is not found, or n == 0.
// Lookup time is O((log(N) + len(res))*len(s)) where N is the // Lookup time is O((log(N) + len(result))*len(s)) where N is the
// size of the indexed data. // size of the indexed data.
// //
func (x *Index) Lookup(s []byte, n int) []int { func (x *Index) Lookup(s []byte, n int) []int {
@ -102,14 +102,8 @@ func (x *Index) Lookup(s []byte, n int) []int {
} }
// index is like Index; it is only used to hide the sort.Interface methods // index is used to hide the sort.Interface
type index struct { type index Index
data []byte
sa []int
}
// index implements sort.Interface
func (x *index) Len() int { return len(x.sa) } func (x *index) Len() int { return len(x.sa) }
func (x *index) Less(i, j int) bool { return bytes.Compare(x.at(i), x.at(j)) < 0 } func (x *index) Less(i, j int) bool { return bytes.Compare(x.at(i), x.at(j)) < 0 }