Update README.md

ci: switch to GitHub Actions.

.github/workflows/cpp.yml

@@ -12,9 +12,9 @@ jobs:
       run: |
         sudo apt-get install -y scons
         sudo apt-get install -y cmake scons
-        wget https://github.com/google/googletest/archive/release-1.8.0.zip
-        unzip -q release-1.8.0.zip
-        cd googletest-release-1.8.0
+        wget https://github.com/google/googletest/archive/release-1.11.0.zip
+        unzip -q release-1.11.0.zip
+        cd googletest-release-1.11.0
         cmake .
         make
         sudo make install

.gitignore

@@ -9,6 +9,7 @@ examples/intdiff3
 examples/patch
 examples/fpatch
 examples/st2ses
+examples/strdiff_storage
 test/strdiff3_test
 test/*/*/*_
 *.o

ChangeLog

@@ -1,3 +1,9 @@
+2022-04-11 Tatsuhiko Kubo <cubicdaiya@gmail.com>
+
+	* bugfix: fixed invalid offset in unified format difference when difference is too large.
+
+	* 1.20 released
+
 2015-05-03 Tatsuhiko Kubo <cubicdaiya@gmail.com>
 
 	* added some minor changes.

README.md

@@ -1,6 +1,4 @@
-# dtl
-
-[![Build Status](https://travis-ci.org/cubicdaiya/dtl.png?branch=master)](https://travis-ci.org/cubicdaiya/dtl)
+# dtl - forked from [https://github.com/cubicdaiya/dtl](https://github.com/cubicdaiya/dtl)
 
 `dtl` is the diff template library written in C++. The name of template is derived C++'s Template.
 
@@ -253,7 +251,7 @@ dtl::Diff<elem, sequence> d(A, B);
 d.compose();
 d.composeUnifiedHunks()
 string s1(A);
-string s2 = d.UniPatch(s1);
+string s2 = d.uniPatch(s1);
 ```
 
 When the above code is run, s2 becomes "abd".

dtl/Diff.hpp

@@ -67,6 +67,8 @@ namespace dtl {
         bool               editDistanceOnly;
         uniHunkVec         uniHunks;
         comparator         cmp;
+        long long          ox;
+        long long          oy;
     public :
         Diff () {}
         
@@ -162,7 +164,7 @@ namespace dtl {
             return trivial;
         }
         
-        void enableTrivial () const {
+        void enableTrivial () {
             this->trivial = true;
         }
         
@@ -260,7 +262,8 @@ namespace dtl {
             if (isHuge()) {
                 pathCordinates.reserve(MAX_CORDINATES_SIZE);
             }
-            
+            ox = 0;
+            oy = 0;
             long long p = -1;
             fp = new long long[M + N + 3];
             fill(&fp[0], &fp[M + N + 3], -1);
@@ -280,7 +283,7 @@ namespace dtl {
             
             editDistance += static_cast<long long>(delta) + 2 * p;
             long long r = path[delta+offset];
-            P cordinate;
+            P cordinate{};
             editPathCordinates epc(0);
             
             // recording edit distance only
@@ -558,6 +561,8 @@ namespace dtl {
             trivial          = false;
             editDistanceOnly = false;
             fp               = NULL;
+            ox               = 0;
+            oy               = 0;
         }
         
         /**
@@ -595,18 +600,18 @@ namespace dtl {
                 while(px_idx < v[i].x || py_idx < v[i].y) {
                     if (v[i].y - v[i].x > py_idx - px_idx) {
                         if (!wasSwapped()) {
-                            ses.addSequence(*y, 0, y_idx, SES_ADD);
+                            ses.addSequence(*y, 0, y_idx + oy, SES_ADD);
                         } else {
-                            ses.addSequence(*y, y_idx, 0, SES_DELETE);
+                            ses.addSequence(*y, y_idx + oy, 0, SES_DELETE);
                         }
                         ++y;
                         ++y_idx;
                         ++py_idx;
                     } else if (v[i].y - v[i].x < py_idx - px_idx) {
                         if (!wasSwapped()) {
-                            ses.addSequence(*x, x_idx, 0, SES_DELETE);
+                            ses.addSequence(*x, x_idx + ox, 0, SES_DELETE);
                         } else {
-                            ses.addSequence(*x, 0, x_idx, SES_ADD);
+                            ses.addSequence(*x, 0, x_idx + ox, SES_ADD);
                         }
                         ++x;
                         ++x_idx;
@@ -614,10 +619,10 @@ namespace dtl {
                     } else {
                         if (!wasSwapped()) {
                             lcs.addSequence(*x);
-                            ses.addSequence(*x, x_idx, y_idx, SES_COMMON);
+                            ses.addSequence(*x, x_idx + ox, y_idx + oy, SES_COMMON);
                         } else {
                             lcs.addSequence(*y);
-                            ses.addSequence(*y, y_idx, x_idx, SES_COMMON);
+                            ses.addSequence(*y, y_idx + oy, x_idx + ox, SES_COMMON);
                         }
                         ++x;
                         ++y;
@@ -658,6 +663,8 @@ namespace dtl {
                 fp = new long long[M + N + 3];
                 fill(&fp[0], &fp[M + N + 3], -1);
                 fill(path.begin(), path.end(), -1);
+                ox = x_idx - 1;
+                oy = y_idx - 1;
                 return false;
             }
             return true;

dtl/variables.hpp

@@ -63,7 +63,7 @@ namespace dtl {
     /**
      * version string
      */
-    const string version = "1.19";
+    const string version = "1.20";
 
     /**
      * type of edit for SES

examples/SConstruct

@@ -15,13 +15,13 @@ if os.sys.platform != "win32":
 conf = Configure(env);
 
 if not conf.CheckCXX():
-    print "The C++ compiler is not installed!"
+    print("The C++ compiler is not installed!")
     Exit(1)
 
 libs = ['stdc++']
 for lib in libs:
     if not conf.CheckLib(lib):
-        print "library " + lib + " not installed!"
+        print("library " + lib + " not installed!")
         Exit(1)
 
 conf.Finish()

test/Patchtest.cpp

@@ -35,6 +35,7 @@ protected :
         cases.push_back(createCase("abcdefq3wefarhgorequgho4euhfteowauhfwehogfewrquhoi23hroewhoahfotrhguoiewahrgqqabcdef",
                                    "3abcdef4976fd86ouofita67t85r876e5e746578tgliuhopoqqabcdef")); // 8
         cases.push_back(createCase("abcqqqeqqqccc", "abdqqqeqqqddd")); // 9
+        cases.push_back(createCase("aaaaaaaaaaaaa>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>aaaadsafabcaaaaaaaaaaaaaaaaaaewaaabdaaaaaabbb", "aaaaaaaaaaaaaaadasfdsafsadasdafbaaaaaaaaaaaaaaaaaeaaaaaaaaaae&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&saaabcaaaaaaccc")); // 10
     }
     
     void TearDown () {}
@@ -96,3 +97,8 @@ TEST_F (Patchtest, patch_test9) {
     ASSERT_EQ(cases[9].B, cases[9].diff.patch(cases[9].A));
     ASSERT_EQ(cases[9].B, cases[9].diff.uniPatch(cases[9].A));
 }
+
+TEST_F (Patchtest, patch_test10) {
+    ASSERT_EQ(cases[10].B, cases[10].diff.patch(cases[10].A));
+    ASSERT_EQ(cases[10].B, cases[10].diff.uniPatch(cases[10].A));
+}

test/SConstruct

@@ -11,6 +11,7 @@ def path_chomp(path):
 env  = Environment(
     CPPFLAGS=['-Wall', '-O2'],
     CPPPATH=['..'],
+	CXXFLAGS="-std=c++11",
 )
 
 conf = Configure(env);