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Allow saving SES to provided data storage

.github/workflows/cpp.yml

@@ -0,0 +1,30 @@
+name: C++
+
+on: [push]
+jobs:
+
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Install scons and gtest
+      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
+        cmake .
+        make
+        sudo make install
+
+    - name: Build examples
+      run: |
+        cd examples
+        scons
+
+    - name: Test
+      run: |
+        cd test
+        scons check

.travis.yml

@@ -1,18 +0,0 @@
-language: cpp
-compiler:
-  - gcc
-  - clang
-before_script:
-  - sudo apt-get install -y cmake
-  - 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
-  - cmake .
-  - make
-  - sudo make install
-  - cd ..
-script:
-  - cd examples
-  - scons
-  - cd ../test
-  - scons check

README.md

@@ -8,30 +8,30 @@
 
  * [Features](#features)
  * [Getting started](#getting-started)
-  * [Compare two strings](#compare-two-strings)
-  * [Compare two data has arbitrary type](#compare-two-data-has-arbitrary-type)
-  * [Merge three sequences](#merge-three-sequences)
-  * [Patch function](#patch-function)
-  * [Difference as Unified Format](#difference-as-unified-format)
-  * [Compare large sequences](#compare-large-sequences)
-  * [Unserious difference](#unserious-difference)
-  * [Calculate only Edit Distance](#calculate-only-edit-distance)
+     * [Compare two strings](#compare-two-strings)
+     * [Compare two data has arbitrary type](#compare-two-data-has-arbitrary-type)
+     * [Merge three sequences](#merge-three-sequences)
+     * [Patch function](#patch-function)
+     * [Difference as Unified Format](#difference-as-unified-format)
+     * [Compare large sequences](#compare-large-sequences)
+     * [Unserious difference](#unserious-difference)
+     * [Calculate only Edit Distance](#calculate-only-edit-distance)
  * [Algorithm](#algorithm)
-  * [Computational complexity](#computational-complexity)
-  * [Comparison when difference between two sequences is very large](#comparison-when-difference-between-two-sequences-is-very-large)
-  * [Implementations with various programming languages](#implementations-with-various-programming-languages)
+     * [Computational complexity](#computational-complexity)
+     * [Comparison when difference between two sequences is very large](#comparison-when-difference-between-two-sequences-is-very-large)
+     * [Implementations with various programming languages](#implementations-with-various-programming-languages)
  * [Examples](#examples)
-  * [strdiff](#strdiff)
-  * [intdiff](#intdiff)
-  * [unidiff](#unidiff)
-  * [unistrdiff](#unistrdiff)
-  * [strdiff3](#strdiff3)
-  * [intdiff3](#intdiff3)
-  * [patch](#patch)
-  * [fpatch](#fpatch)
+     * [strdiff](#strdiff)
+     * [intdiff](#intdiff)
+     * [unidiff](#unidiff)
+     * [unistrdiff](#unistrdiff)
+     * [strdiff3](#strdiff3)
+     * [intdiff3](#intdiff3)
+     * [patch](#patch)
+     * [fpatch](#fpatch)
  * [Running tests](#running-tests)
-  * [Building test programs](#building-test-programs)
-  * [Running test programs](#running-test-programs)
+     * [Building test programs](#building-test-programs)
+     * [Running test programs](#running-test-programs)
  * [Old commit histories](#old-commit-histories)
  * [License](#license)
 

dtl/Diff.hpp

@@ -340,6 +340,15 @@ namespace dtl {
             sesElemVec ses_v = ses.getSequence ();
             for_each (ses_v.begin (), ses_v.end(), PT < sesElem, stream > (out));
         }
+
+        /**
+         * store difference between A and B as an SES with custom storage
+         */
+        template < typename storedData, template < typename SEET, typename STRT > class ST >
+        void storeSES(storedData& sd) const {
+            sesElemVec ses_v = ses.getSequence();
+            for_each(ses_v.begin(), ses_v.end(), ST < sesElem, storedData >(sd));
+        }
         
         /**
          * print difference between A and B in the Unified Format

dtl/functors.hpp

@@ -118,6 +118,20 @@ namespace dtl {
     private :
         stream& out_;
     };
+
+    /**
+     * storage class template
+     */
+    template <typename sesElem, typename storedData >
+    class Storage
+    {
+    public:
+        Storage(storedData& sd) : storedData_(sd) {}
+        virtual ~Storage() {}
+        virtual void operator() (const sesElem& se) const = 0;
+    protected:
+        storedData& storedData_;
+    };
     
     /**
      * compare class template

examples/SConstruct

@@ -26,17 +26,18 @@ for lib in libs:
 
 conf.Finish()
 
-targets = { 'strdiff'    : ['strdiff.cpp',    'common.cpp'], # diff between two string sequences
-            'intdiff'    : ['intdiff.cpp'],                  # diff between two integer sequences
-            'unidiff'    : ['unidiff.cpp',    'common.cpp'], # unified diff between two files
-            'unistrdiff' : ['unistrdiff.cpp', 'common.cpp'], # unified diff between two strings
-            'bdiff'      : ['bdiff.cpp',      'common.cpp'], # diff between two byte sequences
-            'strdiff3'   : ['strdiff3.cpp',   'common.cpp'], # three-way string diff program using dtl
-            'intdiff3'   : ['intdiff3.cpp'],                 # three-way integer diff program using dtl
-            'patch'      : ['patch.cpp',      'common.cpp'], # string patch program using dtl
-            'fpatch'     : ['fpatch.cpp',     'common.cpp'], # file patch program using dtl
-            'st2ses'     : ['st2ses.cpp',     'common.cpp'], # convert SES format file to SES instance
-            'strdiff_cp' : ['strdiff_cp.cpp', 'common.cpp'], # diff between two string sequences with custom printer
+targets = { 'strdiff'         : ['strdiff.cpp',         'common.cpp'], # diff between two string sequences
+            'intdiff'         : ['intdiff.cpp'],                       # diff between two integer sequences
+            'unidiff'         : ['unidiff.cpp',         'common.cpp'], # unified diff between two files
+            'unistrdiff'      : ['unistrdiff.cpp',      'common.cpp'], # unified diff between two strings
+            'bdiff'           : ['bdiff.cpp',           'common.cpp'], # diff between two byte sequences
+            'strdiff3'        : ['strdiff3.cpp',        'common.cpp'], # three-way string diff program using dtl
+            'intdiff3'        : ['intdiff3.cpp'],                      # three-way integer diff program using dtl
+            'patch'           : ['patch.cpp',           'common.cpp'], # string patch program using dtl
+            'fpatch'          : ['fpatch.cpp',          'common.cpp'], # file patch program using dtl
+            'st2ses'          : ['st2ses.cpp',          'common.cpp'], # convert SES format file to SES instance
+            'strdiff_cp'      : ['strdiff_cp.cpp',      'common.cpp'], # diff between two string sequences with custom printer
+            'strdiff_storage' : ['strdiff_storage.cpp', 'common.cpp'], # diff between two string sequences with custom storage
             }
 
 [ env.Program(target, targets[target]) for target in targets ]

examples/printers.hpp

@@ -1,23 +1,25 @@
 #ifndef DTL_PRINTERS
 #define DTL_PRINTERS
 
+#include <dtl/dtl.hpp>
+
 template <typename sesElem, typename stream = ostream >
-class customChangePrinter : public Printer < sesElem, stream >
+class customChangePrinter : public dtl::Printer < sesElem, stream >
 {
 public :
-    customChangePrinter () : Printer < sesElem, stream > () {}
-    customChangePrinter (stream& out) : Printer < sesElem, stream > (out) {}
+    customChangePrinter () : dtl::Printer < sesElem, stream > () {}
+    customChangePrinter (stream& out) : dtl::Printer < sesElem, stream > (out) {}
     ~customChangePrinter () {}
     void operator() (const sesElem& se) const {
         switch (se.second.type) {
-        case SES_ADD:
-            this->out_ << "Add: " << se.first << endl;
+        case dtl::SES_ADD:
+            this->out_ << "Add: " << se.first << std::endl;
             break;
-        case SES_DELETE:
-            this->out_ << "Delete: " << se.first << endl;
+        case dtl::SES_DELETE:
+            this->out_ << "Delete: " << se.first << std::endl;
             break;
-        case SES_COMMON:
-            this->out_ << "Common: " << se.first << endl;
+        case dtl::SES_COMMON:
+            this->out_ << "Common: " << se.first << std::endl;
             break;
         }
     }

examples/storage.hpp

@@ -0,0 +1,27 @@
+#ifndef DTL_STORAGE
+#define DTL_STORAGE
+
+#include <dtl/dtl.hpp>
+
+template <typename sesElem, typename storedData >
+class CustomStorage : public dtl::Storage < sesElem, storedData >
+{
+public :
+    CustomStorage(storedData& sd) : dtl::Storage < sesElem, storedData > (sd) {}
+    ~CustomStorage() {}
+    void operator() (const sesElem& se) const {
+        switch (se.second.type) {
+        case dtl::SES_ADD:
+            this->storedData_ = this->storedData_ + "Add: " + se.first + "\n";
+            break;
+        case dtl::SES_DELETE:
+            this->storedData_ = this->storedData_ + "Delete: " + se.first + "\n";
+            break;
+        case dtl::SES_COMMON:
+            this->storedData_ = this->storedData_ + "Common: " + se.first + "\n";
+            break;
+        }
+    }
+};
+
+#endif // DTL_STORAGE

examples/strdiff_cp.cpp

@@ -1,19 +1,14 @@
-
 #include <dtl/dtl.hpp>
 #include "common.hpp"
 #include <iostream>
 #include <sstream>
 #include <string>
 
+#include "printers.hpp"
+
 using namespace std;
 
 using dtl::Diff;
-using dtl::SES_ADD;
-using dtl::SES_DELETE;
-using dtl::SES_COMMON;
-using dtl::Printer;
-
-#include "printers.hpp"
 
 int main(int argc, char *argv[]){
     

examples/strdiff_storage.cpp

@@ -0,0 +1,38 @@
+#include <dtl/dtl.hpp>
+#include "common.hpp"
+#include <iostream>
+#include <string>
+
+#include "storage.hpp"
+
+using namespace std;
+
+using dtl::Diff;
+
+int main(int argc, char *argv[]){
+    
+    if (isFewArgs(argc)) {
+        cerr << "Too few arguments." << endl;
+        return -1;
+    }
+    
+    typedef char   elem;
+    typedef string sequence;
+
+    sequence A(argv[1]);
+    sequence B(argv[2]);
+    
+    Diff< elem, sequence > d(A, B);
+    d.compose();
+    
+    // Shortest Edit Script
+    cout << "SES" << endl;
+
+    string result;
+
+    d.storeSES < string, CustomStorage > (result);
+
+    cout << result;
+    
+    return 0;
+}

test/SConstruct

@@ -16,13 +16,13 @@ env  = Environment(
 conf = Configure(env);
 
 if not conf.CheckCXX():
-    print "c++ compiler is not installed!"
+    print("c++ compiler is not installed!")
     Exit(1)
 
 libs = ['stdc++', 'pthread', 'gtest']
 for lib in libs:
     if not conf.CheckLib(lib):
-        print "library " + lib + " not installed!"
+        print("library " + lib + " not installed!")
         Exit(1)
 
 conf.Finish()