steven/TinySTL
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

完成suffix_array

Browse Source
This commit is contained in:
邹晓航
2014-12-30 12:54:55 +08:00
parent 44a820ac4d
commit 9ba0085833
1 changed files with 18 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
TinySTL/SuffixArray.h
View File

@@ -17,12 +17,13 @@ namespace TinySTL{
template<class InputIterator>
//arr - Դ<><D4B4><EFBFBD><EFBFBD>
//len - Դ<><D4B4><EFBFBD>鳤<EFBFBD><E9B3A4>
//max_len - max_len<65><6E><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD>arr<72><72><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD>ȡֵ<C8A1><D6B5>Χ<EFBFBD><CEA7><EFBFBD>ǻ<EFBFBD><C7BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
// <20><><EFBFBD><EFBFBD>ԭ<EFBFBD><D4AD><EFBFBD>ж<EFBFBD><D0B6><EFBFBD><EFBFBD><EFBFBD>ĸ<EFBFBD><C4B8><EFBFBD><EFBFBD>ֱ<EFBFBD><D6B1>ȡ128<32><38><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><D4AD><EFBFBD>б<EFBFBD><D0B1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD><C4BB><EFBFBD><EFBFBD><EFBFBD>m<EFBFBD><6D><EFBFBD><EFBFBD>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>1<EFBFBD><31>ֵ<EFBFBD><D6B5>
suffix_array(InputIterator arr, size_t len, size_t max_len = 128){
//max_len - max_len<65><6E><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD>arr<72><72><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD>ȡֵ<C8A1><D6B5>Χ<EFBFBD><CEA7><EFBFBD>ǻ<EFBFBD><C7BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD><EFBFBD>Կ<EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD><EFBFBD>ȡ256
suffix_array(const InputIterator arr, size_t len, size_t max_len = 256){
if (max_len > 256)
throw std::exception("out of the range");
calSuffix(arr, len, max_len);
calRank();
calHeight(arr, len - 1);
calHeight(arr, len);
}
array_type suffixArray(){
@@ -36,7 +37,7 @@ namespace TinySTL{
}
private:
template<class InputIteraotr>
bool cmp(InputIteraotr arr, size_t a, size_t b, size_t l){
bool cmp(const InputIteraotr arr, size_t a, size_t b, size_t l){
return arr[a] == arr[b] && arr[a + l] == arr[b + l];
}
void calRank(){
@@ -46,11 +47,11 @@ namespace TinySTL{
}
}
template<class InputIterator>
void calSuffix(InputIterator arr, size_t len, size_t max_len){
void calSuffix(const InputIterator arr, size_t len, size_t max_len){
//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD>ֵı<D6B5><C4B1><EFBFBD><EFBFBD>㷨
//<2F>㷨ʱ<E3B7A8>临<EFBFBD>Ӷ<EFBFBD> = O(nlg(n))
_suffix_array.resize(len);
int wa[1024], wb[1024], wv[1024], ws[1024];
int wa[256], wb[256], wv[256], ws[256];
int i, j, p, *x = wa, *y = wb, *t;
//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><D0B4><EFBFBD><EFBFBD>ǰѸ<C7B0><D1B8><EFBFBD><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD>Ҳ<EFBFBD><D2B2><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ1<CEAA><31><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>л<EFBFBD><D0BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
@@ -84,13 +85,17 @@ namespace TinySTL{
}
}
template<class InputIteraotr>
void calHeight(InputIteraotr arr, size_t len)
void calHeight(const InputIteraotr arr, size_t len)
{
/*_height_array.resize(_suffix_array.size());
int i, j, k = 0;
for (i = 1; i <= len; i++) _rank_array[_suffix_array[i]] = i;
for (i = 0; i < len; _height_array[_rank_array[i++]] = k)
for (k ? k-- : 0, j = _suffix_array[_rank_array[i] - 1]; arr[i + k] == arr[j + k]; k++);*/
_height_array.resize(_suffix_array.size() - 1);
for (auto i = 0; i != _suffix_array.size() - 1; ++i){
auto n = 0;
for (auto j = _suffix_array[i], k = _suffix_array[i + 1];
arr[j] == arr[k] && (arr + j) != (arr + len) && (arr + k) != (arr + len);
++j, ++k)
++n;
_height_array[i] = n;
}
}
};
}