From 7784f65e218ae49997770da9590227d4616679b3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=82=B9=E6=99=93=E8=88=AA?= <1210603696@qq.com>
Date: Tue, 30 Dec 2014 11:11:47 +0800
Subject: [PATCH] add suffix_array

---
 TinySTL/SuffixArray.h           | 55 +++++++++++++++++++++++++++++++++
 TinySTL/TinySTL.vcxproj         | 10 ++++++
 TinySTL/TinySTL.vcxproj.filters | 30 ++++++++++++++++++
 3 files changed, 95 insertions(+)
 create mode 100644 TinySTL/SuffixArray.h

diff --git a/TinySTL/SuffixArray.h b/TinySTL/SuffixArray.h
new file mode 100644
index 0000000..50d1388
--- /dev/null
+++ b/TinySTL/SuffixArray.h
@@ -0,0 +1,55 @@
+#ifndef _SUFFIX_ARRAY_H_
+#define _SUFFIX_ARRAY_H_
+
+#include <vector>
+#include <memory>
+
+namespace TinySTL{
+	
+	class suffix_array{
+	private:
+		//typedef std::unique_ptr<std::vector<int>> vecPtr;
+	private:
+		std::vector<int> _array;
+	public:
+		template<class InputIterator>
+		//arr - Ô´Êý×é
+		//len - Ô´Êý×鳤¶È
+		//max_len - max_len´ú±í×Ö·û´®ÖÐ×Ö·ûµÄÈ¡Öµ·¶Î§£¬ÊÇ»ùÊýÅÅÐòµÄÒ»¸ö²ÎÊý£¬
+		//          Èç¹ûÔ­ÐòÁж¼ÊÇ×Öĸ¿ÉÒÔÖ±½ÓÈ¡128£¬Èç¹ûÔ­ÐòÁб¾Éí¶¼ÊÇÕûÊýµÄ»°£¬Ôòm¿ÉÒÔÈ¡±È×î´óµÄÕûÊý´ó1µÄÖµ¡£
+		suffix_array(InputIterator arr, int len, int max_len = 128){
+			//²ÉÓÃÁËÂÞËëå¹ÂÛÎÄÖÐʵÏֵı¶ÔöËã·¨
+			_array.resize(len);
+			int wa[1024], wb[1024], wv[1024], ws[1024];
+
+			int i, j, p, *x = wa, *y = wb, *t;
+			for (i = 0; i < max_len; i++) ws[i] = 0;
+			for (i = 0; i < len; i++) ws[x[i] = arr[i]]++;
+			for (i = 1; i < max_len; i++) ws[i] += ws[i - 1];
+			for (i = len - 1; i >= 0; i--) _array[--ws[x[i]]] = i;
+			for (j = 1, p = 1; p < len; j *= 2, max_len = p)
+			{
+				for (p = 0, i = len - j; i < len; i++) y[p++] = i;
+				for (i = 0; i < len; i++) if (_array[i] >= j) y[p++] = _array[i] - j;
+				for (i = 0; i < len; i++) wv[i] = x[y[i]];
+				for (i = 0; i < max_len; i++) ws[i] = 0;
+				for (i = 0; i < len; i++) ws[wv[i]]++;
+				for (i = 1; i < max_len; i++) ws[i] += ws[i - 1];
+				for (i = len - 1; i >= 0; i--) _array[--ws[wv[i]]] = y[i];
+				for (t = x, x = y, y = t, p = 1, x[_array[0]] = 0, i = 1; i < len; i++)
+					x[_array[i]] = cmp(y, _array[i - 1], _array[i], j) ? p - 1 : p++;
+			}
+			return;
+		}
+
+		const std::vector<int> suffixArray()const{
+			return _array;
+		}
+	private:
+		bool cmp(int *arr, int a, int b, int l){
+			return arr[a] == arr[b] && arr[a + l] == arr[b + l];
+		}
+	};
+}
+
+#endif
\ No newline at end of file
diff --git a/TinySTL/TinySTL.vcxproj b/TinySTL/TinySTL.vcxproj
index b3c6c24..d8cba9a 100644
--- a/TinySTL/TinySTL.vcxproj
+++ b/TinySTL/TinySTL.vcxproj
@@ -83,6 +83,10 @@
     <ClCompile Include="Profiler\Profiler.cpp" />
     <ClCompile Include="Test\AlgorithmTest.cpp" />
     <ClCompile Include="Test\PairTest.cpp" />
+    <ClCompile Include="Test\PriorityQueueTest.cpp" />
+    <ClCompile Include="Test\StringTest.cpp" />
+    <ClCompile Include="Test\SuffixArrayTest.cpp" />
+    <ClCompile Include="Test\VectorTest.cpp" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="Algorithm.h" />
@@ -102,8 +106,14 @@
     <ClInclude Include="ReverseIterator.h" />
     <ClInclude Include="Stack.h" />
     <ClInclude Include="String.h" />
+    <ClInclude Include="SuffixArray.h" />
+    <ClInclude Include="Test\AlgorithmTest.h" />
     <ClInclude Include="Test\PairTest.h" />
+    <ClInclude Include="Test\PriorityQueueTest.h" />
+    <ClInclude Include="Test\StringTest.h" />
+    <ClInclude Include="Test\SuffixArrayTest.h" />
     <ClInclude Include="Test\TestUtil.h" />
+    <ClInclude Include="Test\VectorTest.h" />
     <ClInclude Include="TypeTraits.h" />
     <ClInclude Include="UninitializedFunctions.h" />
     <ClInclude Include="Utility.h" />
diff --git a/TinySTL/TinySTL.vcxproj.filters b/TinySTL/TinySTL.vcxproj.filters
index 08403ec..97e7b98 100644
--- a/TinySTL/TinySTL.vcxproj.filters
+++ b/TinySTL/TinySTL.vcxproj.filters
@@ -33,6 +33,18 @@
     <ClCompile Include="Test\AlgorithmTest.cpp">
       <Filter>Test</Filter>
     </ClCompile>
+    <ClCompile Include="Test\VectorTest.cpp">
+      <Filter>Test</Filter>
+    </ClCompile>
+    <ClCompile Include="Test\StringTest.cpp">
+      <Filter>Test</Filter>
+    </ClCompile>
+    <ClCompile Include="Test\PriorityQueueTest.cpp">
+      <Filter>Test</Filter>
+    </ClCompile>
+    <ClCompile Include="Test\SuffixArrayTest.cpp">
+      <Filter>Test</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="TypeTraits.h">
@@ -104,6 +116,24 @@
     <ClInclude Include="Test\PairTest.h">
       <Filter>Test</Filter>
     </ClInclude>
+    <ClInclude Include="Test\AlgorithmTest.h">
+      <Filter>Test</Filter>
+    </ClInclude>
+    <ClInclude Include="Test\VectorTest.h">
+      <Filter>Test</Filter>
+    </ClInclude>
+    <ClInclude Include="Test\StringTest.h">
+      <Filter>Test</Filter>
+    </ClInclude>
+    <ClInclude Include="Test\PriorityQueueTest.h">
+      <Filter>Test</Filter>
+    </ClInclude>
+    <ClInclude Include="SuffixArray.h">
+      <Filter>头文件</Filter>
+    </ClInclude>
+    <ClInclude Include="Test\SuffixArrayTest.h">
+      <Filter>Test</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <None Include="..\README.md" />