première version

Makefile

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+all: testAutoText doc
+	./testAutoText < data/LesForcatsDuMariage-lower.txt
+
+testAutoText: cpp/TestAutoText.cpp cpp/TextProdChar.cpp include/TextProdChar.hpp cpp/LexFreq.cpp include/LexFreq.hpp cpp/Context.cpp include/Context.hpp
+	g++ -g -I ./include/ cpp/TestAutoText.cpp cpp/TextProdChar.cpp cpp/LexFreq.cpp cpp/Context.cpp -o testAutoText
+
+clean:
+	rm -fr *~ cpp/*~ include/*~
+
+wipe: clean
+	rm -fr testAutoText autoTextDoc
+
+doc:
+	doxygen Doxyfile >/dev/null

cpp/Context.cpp

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+#include <iostream>
+#include <string>
+#include <cstring>
+#include <map>
+#include <ctype.h>
+
+#include "Context.hpp"
+
+using namespace std;
+
+// ========================================
+const int Context::prevSize (10);
+const string Context::end (".?!");
+const string Context::sep (" ,;’-");
+
+bool
+Context::validChar (const char &c) {
+  if (isalpha (c))
+    return true;
+  return
+    end.find (c) != string::npos ||
+    sep.find (c) != string::npos;
+}
+
+bool
+Context::isEnd (const string &c) {
+  return end.find (c) != string::npos;
+}
+
+bool
+Context::isSep (const string &c) {
+  return sep.find (c) != string::npos;
+}
+
+void
+Context::forward (string current) {
+  if (!prevSize)
+    return;
+  if (current == " " && prev.empty ())
+    return;
+  if (end.find (current) != string::npos) {
+    prev.clear ();
+    return;
+  }
+  prev += current;
+  if (prev.size () > prevSize) {
+    int count (prevSize);
+    for (auto rit (prev.crbegin ()); rit != prev.crend (); ++rit)
+      // (ASCII || start UTF) && countdown
+      if ((! (*rit & 0b10000000) || (*rit & 0b01000000)) && ! --count) {
+	prev = prev.substr (prev.crend () - rit -1);
+	break;
+      }
+  }
+}
+
+// ========================================

cpp/LexFreq.cpp

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+#include <iostream>
+#include <string>
+#include <cstring>
+#include <map>
+#include <ctype.h>
+
+#include "LexFreq.hpp"
+
+using namespace std;
+
+// ========================================
+ostream&
+operator << (ostream& os, const LexFreq &freqLex) {
+  os << " size = " << freqLex.size << endl;
+  for (const auto& [key, value]: freqLex.hist)
+    os << key << " = " << value << endl;
+  return os;
+}
+
+LexFreq::LexFreq () :
+  size (0) {
+}
+
+void
+LexFreq::addChar (const string &c) {
+  ++hist [c];
+  ++size;
+}
+
+string
+LexFreq::getChar () const {
+  if (!size)
+    return "*";
+  long r (rand () % size);
+  for (const auto& [key, value]: hist) {
+    if (r <= value)
+      return key;
+    r -= value;
+  }
+
+  return "*";
+}
+
+// ========================================

cpp/TestAutoText.cpp

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+/*
+
+  La Part du feu. Les Terreurs du bourgeois Prudence et de son ami Furibus, 1873 par M.-L. Gagneur (1832-1902). 
+
+  https://gallica.bnf.fr/services/engine/search/sru?operation=searchRetrieve&exactSearch=false&collapsing=true&version=1.2&query=(dc.creator%20all%20%22Marie-Louise%20Gagneur%22%20or%20dc.contributor%20all%20%22Marie-Louise%20Gagneur%22%20)%20&suggest=10&keywords=Marie-Louise%20Gagneur
+
+  https://fr.wikisource.org/wiki/La_Part_du_feu?rk=42918;4
+*/
+
+#include <iostream>
+#include <fstream>
+#include <cstdlib>
+
+#include "TextProdChar.hpp"
+
+using namespace std;
+
+void
+test () {
+  for (string line; getline (cin, line); ) {
+    for (string::iterator it (line.begin ());
+	 it != line.end ();
+	 ++it) {
+      unsigned char c = *it;
+      if (c & 0b10000000) {
+	++it;
+	cout << c << *it << "\\";
+	continue;
+      }
+      cout << c << "/";
+    }
+  }
+}
+
+// ========================================
+int
+main (int argc, char** argv) {
+  cerr << endl << "    ** Test TextProdChar" << endl;
+
+  // ifstream in ("in.txt");
+  // ofstream out ("out.txt");
+
+  TextProdChar textProdChar;
+  srand (0); //(time (0));
+
+  //test ();
+  textProdChar.learn (cin);
+  // cerr << textProdChar << endl;
+
+  textProdChar.prod (cout, 1000);
+  cerr << endl;
+  return 0;
+}
+
+// ========================================

cpp/TextProdChar.cpp

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+#include <iostream>
+#include <string>
+#include <cstring>
+#include <map>
+#include <ctype.h>
+#include <boost/algorithm/string.hpp>
+
+#include "Context.hpp"
+#include "LexFreq.hpp"
+#include "TextProdChar.hpp"
+
+using namespace std;
+
+// ========================================
+ostream&
+operator << (ostream& os, const TextProdChar &ia) {
+  string empty;
+  os << ia.prevFreq.at(empty);
+  os << " size = " << ia.prevFreq.size () << endl;
+  for (const auto& [key, value]: ia.prevFreq)
+    os << key << " = " << value.getSize () << endl;
+  return os;
+}
+
+
+void
+TextProdChar::learn (istream &in) {
+  string comp;
+  for (string line; getline (in, line); ) {
+    for (string::iterator it (line.begin ());
+	 it != line.end ();
+	 ++it) {
+      char c = *it;
+      comp.clear ();
+      comp.push_back (c);
+
+      if (c & 0b10000000) {
+	if ((c & 0b11100000) == 0b11000000) {
+	  ++it; comp.push_back (*it);
+	} else if ((c & 0b11110000) == 0b11100000) {
+	  ++it; comp.push_back (*it);
+	  ++it; comp.push_back (*it);
+	} else if ((c & 0b11111000) == 0b11110000) {
+	  ++it; comp.push_back (*it);
+	  ++it; comp.push_back (*it);
+	  ++it; comp.push_back (*it);
+	} else {
+	  cout << "*";
+	}
+      } else {
+	// ASCII
+	if (! Context::validChar (c))
+	  continue;
+      }
+
+      if (context.empty () && (context.isSep (comp) || context.isEnd (comp)))
+	continue;
+      prevFreq[context.getState ()].addChar (comp);
+      context.forward (comp);
+    }
+  }
+}
+
+void
+TextProdChar::prod (ostream &out, const long &size) {
+  context.reset ();
+  bool nl (false), end (false);
+  for (long i (0), col (0); ; ++i, ++col) {
+    if (i > size)
+      end = true;
+    if (col > 80)
+      nl = true;
+    bool maj (context.empty ());
+    string next (prevFreq[context.getState ()].getChar ());
+    context.forward (next);
+    if (maj)
+      boost::to_upper (next);
+    out << next;
+    if (context.isEnd (next) ||
+	(nl && context.isSep (next))) {
+      out << endl;
+      nl = false;
+      col = 0;
+      if (end && context.isEnd (next))
+	break;
+    }
+  }
+  out << endl;
+}
+
+// ========================================

include/Context.hpp

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+/*!
+ * @file Context.hpp
+ * @brief calcul de fréquence et prédiction
+ * @author F. Merciol
+ * @version 0.1
+ * @date 18 / août 2023
+ */
+#ifndef _Context_hpp_
+#define _Context_hpp_
+
+#include <iostream>
+#include <map>
+
+using namespace std;
+
+// ========================================
+class Context {
+  string prev;
+  static const int prevSize;
+  static const string end;
+  static const string sep;
+public:
+  static bool validChar (const char &c);
+  static bool isEnd (const string &c);
+  static bool isSep (const string &c);
+  bool empty () { return prev.empty (); }
+  void reset () { prev.clear (); }
+  string getState () { return prev; }
+  void forward (string current);
+};
+
+// ========================================
+#endif // _Context_hpp_

include/LexFreq.hpp

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+/*!
+ * @file LexFreq.hpp
+ * @brief calcul de fréquence et prédiction
+ * @author F. Merciol
+ * @version 0.1
+ * @date 18 / août 2023
+ */
+#ifndef _LexFreq_hpp_
+#define _LexFreq_hpp_
+
+#include <iostream>
+#include <map>
+
+using namespace std;
+
+// ========================================
+class LexFreq {
+  long size;
+  map<string, long> hist;
+public:
+  friend ostream& operator << (ostream& os, const LexFreq &freqLex);
+
+  LexFreq ();
+  long getSize () const { return hist.size (); }
+  void addChar (const string &c);
+  string getChar () const;
+};
+
+// ========================================
+#endif // _LexFreq_hpp_

include/TextProdChar.hpp

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+/*!
+ * @file TextProdChar.hpp
+ * @brief calcul de fréquence et prédiction
+ * @author F. Merciol
+ * @version 0.1
+ * @date 18 / août 2023
+ */
+#ifndef _TextProdChar_hpp_
+#define _TextProdChar_hpp_
+
+#include <iostream>
+#include <map>
+
+#include "Context.hpp"
+#include "LexFreq.hpp"
+
+using namespace std;
+
+// ========================================
+class TextProdChar {
+  Context context;
+  map<string, LexFreq> prevFreq;
+public:
+  friend ostream& operator << (ostream& os, const TextProdChar &ia);
+
+  void learn (istream &in);
+  void prod (ostream &out, const long &size);
+};
+
+
+// ========================================
+#endif // _TextProdChar_hpp_

mainpage.md

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+Exemple de production automatique de texte.
+
+