From 8b92935b1e2964889d76fe64374be1ab3b040027 Mon Sep 17 00:00:00 2001
From: Albrecht Schlosser <albrechts.fltk@online.de>
Date: Sun, 6 Nov 2022 15:01:47 +0100
Subject: Add Fl_Int_Vector: "an STL-ish vector without templates"

Code copied from Fl_Table and reformatted.

Thanks to Greg for the original code.
---
 FL/Fl_Int_Vector.H    | 83 +++++++++++++++++++++++++++++++++++++++++++++++++++
 src/CMakeLists.txt    |  1 +
 src/Fl_Int_Vector.cxx | 43 ++++++++++++++++++++++++++
 src/Makefile          |  1 +
 4 files changed, 128 insertions(+)
 create mode 100644 FL/Fl_Int_Vector.H
 create mode 100644 src/Fl_Int_Vector.cxx

diff --git a/FL/Fl_Int_Vector.H b/FL/Fl_Int_Vector.H
new file mode 100644
index 000000000..1ab092a18
--- /dev/null
+++ b/FL/Fl_Int_Vector.H
@@ -0,0 +1,83 @@
+//
+// An STL-ish vector without templates for the Fast Light Tool Kit (FLTK).
+//
+// Copyright 2002 by Greg Ercolano.
+// Copyright 2022 by Bill Spitzak and others.
+//
+// This library is free software. Distribution and use rights are outlined in
+// the file "COPYING" which should have been included with this file.  If this
+// file is missing or damaged, see the license at:
+//
+//     https://www.fltk.org/COPYING.php
+//
+// Please see the following page on how to report bugs and issues:
+//
+//     https://www.fltk.org/bugs.php
+//
+
+#ifndef Fl_Int_Vector_H
+#define Fl_Int_Vector_H
+
+#include <FL/Fl.H>
+
+class FL_EXPORT Fl_Int_Vector {
+  int *arr_;
+  unsigned int size_;
+  void init() {
+    arr_ = 0;
+    size_ = 0;
+  }
+  void copy(int *newarr, unsigned int newsize);
+
+public:
+  Fl_Int_Vector() {
+    init();
+  }
+
+  ~Fl_Int_Vector();
+
+  // copy constructor
+  Fl_Int_Vector(Fl_Int_Vector &o) {
+    init();
+    copy(o.arr_, o.size_);
+  }
+
+  // assignment operator
+  Fl_Int_Vector &operator=(Fl_Int_Vector &o) {
+    init();
+    copy(o.arr_, o.size_);
+    return *this;
+  }
+
+  int operator[](int x) const {
+    return arr_[x];
+  }
+
+  int &operator[](int x) {
+    return arr_[x];
+  }
+
+  unsigned int size() {
+    return size_;
+  }
+
+  void size(unsigned int count);
+
+  int pop_back() {
+    int tmp = arr_[size_ - 1];
+    size_--;
+    return tmp;
+  }
+
+  void push_back(int val) {
+    unsigned int x = size_;
+    size(size_ + 1);
+    arr_[x] = val;
+  }
+
+  int back() {
+    return arr_[size_ - 1];
+  }
+};
+
+#endif // Fl_Int_Vector_H
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index bfeb13c56..c5a82bcc8 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -48,6 +48,7 @@ set (CPPFILES
   Fl_Input.cxx
   Fl_Input_.cxx
   Fl_Input_Choice.cxx
+  Fl_Int_Vector.cxx
   Fl_Light_Button.cxx
   Fl_Menu.cxx
   Fl_Menu_.cxx
diff --git a/src/Fl_Int_Vector.cxx b/src/Fl_Int_Vector.cxx
new file mode 100644
index 000000000..361dd2634
--- /dev/null
+++ b/src/Fl_Int_Vector.cxx
@@ -0,0 +1,43 @@
+//
+// An STL-ish vector without templates for the Fast Light Tool Kit (FLTK).
+//
+// Copyright 2002 by Greg Ercolano.
+// Copyright 2022 by Bill Spitzak and others.
+//
+// This library is free software. Distribution and use rights are outlined in
+// the file "COPYING" which should have been included with this file.  If this
+// file is missing or damaged, see the license at:
+//
+//     https://www.fltk.org/COPYING.php
+//
+// Please see the following page on how to report bugs and issues:
+//
+//     https://www.fltk.org/bugs.php
+//
+
+#include <FL/Fl_Int_Vector.H>
+#include <stdlib.h>
+
+void Fl_Int_Vector::copy(int *newarr, unsigned int newsize) {
+  size(newsize);
+  memcpy(arr_, newarr, newsize * sizeof(int));
+}
+
+Fl_Int_Vector::~Fl_Int_Vector() {
+  if (arr_)
+    free(arr_);
+}
+
+void Fl_Int_Vector::size(unsigned int count) {
+  if (count <= 0) {
+    if (arr_)
+      free(arr_);
+    arr_ = 0;
+    size_ = 0;
+    return;
+  }
+  if (count > size_) {
+    arr_ = (int *)realloc(arr_, count * sizeof(int));
+    size_ = count;
+  }
+}
diff --git a/src/Makefile b/src/Makefile
index cb3421414..0f820287e 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -51,6 +51,7 @@ CPPFILES = \
 	Fl_Input.cxx \
 	Fl_Input_.cxx \
 	Fl_Input_Choice.cxx \
+	Fl_Int_Vector.cxx \
 	Fl_Light_Button.cxx \
 	Fl_Menu.cxx \
 	Fl_Menu_.cxx \
-- 
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