chore: Add course material

397/SolutionEx33Bonus/Ex33.sln

@@ -0,0 +1,21 @@
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 2013
+VisualStudioVersion = 12.0.31101.0
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "Ex33", "Ex33.vcxproj", "{C2EDBD25-9006-0438-220A-8766E6F352A8}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Win32 = Debug|Win32
+		Release|Win32 = Release|Win32
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{C2EDBD25-9006-0438-220A-8766E6F352A8}.Debug|Win32.ActiveCfg = Debug|Win32
+		{C2EDBD25-9006-0438-220A-8766E6F352A8}.Debug|Win32.Build.0 = Debug|Win32
+		{C2EDBD25-9006-0438-220A-8766E6F352A8}.Release|Win32.ActiveCfg = Release|Win32
+		{C2EDBD25-9006-0438-220A-8766E6F352A8}.Release|Win32.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

397/SolutionEx33Bonus/Ex33.vcxproj

@@ -0,0 +1,141 @@
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+  <ItemGroup Label="ProjectConfigurations">
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+      <Platform>Win32</Platform>
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+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <SccProjectName>
+    </SccProjectName>
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+    <ProjectGuid>{C2EDBD25-9006-0438-220A-8766E6F352A8}</ProjectGuid>
+    <ProjectName>Ex33</ProjectName>
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
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+    <LinkIncremental Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</LinkIncremental>
+    <OutDir Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">.\Release\</OutDir>
+    <IntDir Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">.\Release\</IntDir>
+    <LinkIncremental Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">false</LinkIncremental>
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+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
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+      <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <RuntimeTypeInfo>true</RuntimeTypeInfo>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <PrecompiledHeaderOutputFile>.\Debug/Ex22.pch</PrecompiledHeaderOutputFile>
+      <AssemblerListingLocation>.\Debug/</AssemblerListingLocation>
+      <ObjectFileName>.\Debug/</ObjectFileName>
+      <ProgramDataBaseFileName>.\Debug/</ProgramDataBaseFileName>
+      <WarningLevel>Level3</WarningLevel>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+      <AdditionalIncludeDirectories>C:\course\397\DOS_Unix;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
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+    <Link>
+      <AdditionalOptions>/MACHINE:I386 %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalDependencies>odbc32.lib;odbccp32.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <OutputFile>.\Debug/Ex33.exe</OutputFile>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <ProgramDatabaseFile>.\Debug/Ex22.pdb</ProgramDatabaseFile>
+      <SubSystem>Console</SubSystem>
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+    <Midl>
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+    </Midl>
+    <ResourceCompile>
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+      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <StringPooling>true</StringPooling>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <PrecompiledHeader>
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+      <PrecompiledHeaderOutputFile>.\Release/Ex22.pch</PrecompiledHeaderOutputFile>
+      <AssemblerListingLocation>.\Release/</AssemblerListingLocation>
+      <ObjectFileName>.\Release/</ObjectFileName>
+      <ProgramDataBaseFileName>.\Release/</ProgramDataBaseFileName>
+      <WarningLevel>Level3</WarningLevel>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+    </ClCompile>
+    <Link>
+      <AdditionalOptions>/MACHINE:I386 %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalDependencies>odbc32.lib;odbccp32.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <OutputFile>.\Release/Ex33.exe</OutputFile>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+      <ProgramDatabaseFile>.\Release/Ex22.pdb</ProgramDatabaseFile>
+      <SubSystem>Console</SubSystem>
+    </Link>
+    <Midl>
+      <TypeLibraryName>.\Release/Ex22.tlb</TypeLibraryName>
+    </Midl>
+    <ResourceCompile>
+      <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <Culture>0x0409</Culture>
+    </ResourceCompile>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="Light.cpp" />
+    <ClCompile Include="Pelican.cpp" />
+    <ClCompile Include="Pole.cpp" />
+    <ClCompile Include="Timer.cpp" />
+    <ClCompile Include="TimerSet.cpp" />
+    <ClCompile Include="main.cpp" />
+    <ClCompile Include="..\DOS_Unix\Keyboard_DOS.cpp" />
+    <ClCompile Include="..\DOS_Unix\Screen_DOS.cpp" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="Light.h" />
+    <ClInclude Include="Pelican.h" />
+    <ClInclude Include="Pole.h" />
+    <ClInclude Include="Timer.h" />
+    <ClInclude Include="TimerSet.h" />
+    <ClInclude Include="..\DOS_Unix\Keyboard.h" />
+    <ClInclude Include="..\DOS_Unix\Screen.h" />
+    <ClInclude Include="TimerT.h" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>

397/SolutionEx33Bonus/Ex33.vcxproj.filters

@@ -0,0 +1,68 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Source Files">
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+      <Extensions>cpp;c;cxx;rc;def;r;odl;idl;hpj;bat</Extensions>
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+    <Filter Include="DOS_Unix">
+      <UniqueIdentifier>{f8ec245a-126d-413b-8f31-4f57d4342719}</UniqueIdentifier>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="Light.cpp">
+      <Filter>Source Files</Filter>
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+    <ClCompile Include="Pelican.cpp">
+      <Filter>Source Files</Filter>
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+    <ClCompile Include="Pole.cpp">
+      <Filter>Source Files</Filter>
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+    <ClCompile Include="Timer.cpp">
+      <Filter>Source Files</Filter>
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+      <Filter>Source Files</Filter>
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+    <ClCompile Include="main.cpp">
+      <Filter>Source Files</Filter>
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+    <ClCompile Include="..\DOS_Unix\Keyboard_DOS.cpp">
+      <Filter>DOS_Unix</Filter>
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+      <Filter>DOS_Unix</Filter>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="Pelican.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="Pole.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="Timer.h">
+      <Filter>Header Files</Filter>
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+    <ClInclude Include="TimerSet.h">
+      <Filter>Header Files</Filter>
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+      <Filter>DOS_Unix</Filter>
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+    <ClInclude Include="..\DOS_Unix\Screen.h">
+      <Filter>DOS_Unix</Filter>
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+    <ClInclude Include="TimerT.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="Light.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+  </ItemGroup>
+</Project>

397/SolutionEx33Bonus/Ex33.vcxproj.user

@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+</Project>

397/SolutionEx33Bonus/Light.cpp

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+
+
+#include "Light.h"
+#include "Pelican.h"
+#include "Screen.h"
+#include <iostream>
+
+Light::Light(std::string name, int x, int y, int color) : x(x), y(y), c(color), name(name) {}
+
+Light::~Light() {
+    std::cout << "Deleting light (" << name << ", " << x << ", " << y << ", " << c << ")"
+              << "\n";
+}
+
+void Light::set(LightState newState) {
+    state = newState;
+    Screen::write(name.c_str(), x, y, state == FLASH ? (128 + c) : (state == OFF ? 0 : c));
+    // 128 + color was used to make a character flash (but not any more)
+}
+
+Light::LightState Light::get(void) { return state; }

397/SolutionEx33Bonus/Light.h

@@ -0,0 +1,30 @@
+// ======================================================
+//
+// Represents a light, implemented as a string written
+// to a console window
+//
+// ======================================================
+
+#ifndef LIGHT_H
+#define LIGHT_H
+
+#include <string>
+
+class Light {
+  public:
+    Light(std::string name, int x, int y, int color);
+    ~Light();
+
+    enum LightState { ON, OFF, FLASH };
+
+    void set(LightState new_state);
+    LightState get(void);
+
+  private:
+    int c; // light colour
+    int x, y;
+    std::string name;
+    LightState state;
+};
+
+#endif

397/SolutionEx33Bonus/Pelican.cpp

@@ -0,0 +1,65 @@
+
+
+#include "Pelican.h"
+#include "Pole.h"
+
+Pelican::Pelican(int x, int y)
+    : pressed(false), RED_TIME(4), YELLOW_TIME(2), GREEN_TIME(3), FLASH_TIME(5), myPole(new Pole(x, y)),
+      state(GREEN_IDLE) {
+    myTimer = new TimerT<Pelican>(*this, &Pelican::timerExpired);
+
+    myPole->setTrafficLights(getState());
+    myPole->setWaitLight(isPressed());
+}
+
+Pelican::~Pelican() { delete myPole; }
+
+void Pelican::press(void) {
+    if (state == GREEN_IDLE) {
+        state = YELLOW_STATE;
+        myTimer->timeoutRequest(YELLOW_TIME);
+        pressed = true;
+        myPole->setTrafficLights(getState());
+        myPole->setWaitLight(isPressed());
+    } else if (state != RED_STATE) {
+        pressed = true;
+        myPole->setTrafficLights(getState());
+        myPole->setWaitLight(isPressed());
+    }
+}
+
+void Pelican::timerExpired(void) {
+    switch (state) {
+    case RED_STATE:
+        state = YELLOW_FLASHING;
+        myTimer->timeoutRequest(FLASH_TIME);
+        break;
+
+    case YELLOW_FLASHING:
+        state = GREEN_TIMING;
+        myTimer->timeoutRequest(GREEN_TIME);
+        break;
+
+    case GREEN_TIMING:
+        if (pressed) {
+            state = YELLOW_STATE;
+            myTimer->timeoutRequest(YELLOW_TIME);
+        } else {
+            state = GREEN_IDLE;
+        }
+        break;
+
+    case GREEN_IDLE:
+        //    should never happen
+        break;
+
+    case YELLOW_STATE:
+        state = RED_STATE;
+        pressed = false;
+        myTimer->timeoutRequest(RED_TIME);
+        break;
+    }
+
+    myPole->setTrafficLights(getState());
+    myPole->setWaitLight(isPressed());
+}

397/SolutionEx33Bonus/Pelican.h

@@ -0,0 +1,54 @@
+// ======================================================
+//
+// Represents a Pelican crossing
+//
+// ======================================================
+
+#ifndef PELICAN_H
+#define PELICAN_H
+
+#include "TimerT.h"
+
+class Pole;
+
+class Pelican {
+  public:
+    Pelican(int x, int y);
+    ~Pelican();
+
+    // call when the WAIT button has been pressed
+    void press(void);
+
+    // states that a Pelican can be in
+    enum PelicanState { RED_STATE, YELLOW_FLASHING, GREEN_TIMING, GREEN_IDLE, YELLOW_STATE };
+
+    bool isPressed() const { return pressed; }
+    PelicanState getState() const { return state; }
+
+  private:
+    // state that this Pelican is in
+    PelicanState state;
+
+    // called by PeleicanTimer when the lights need to change
+    void timerExpired(void);
+
+    const unsigned int RED_TIME;
+    const unsigned int YELLOW_TIME;
+    const unsigned int GREEN_TIME;
+    const unsigned int FLASH_TIME;
+
+    // indicates whether the WAIT light should be on
+    bool pressed;
+
+    Pole *myPole;
+
+    // Timer that indicates when the lights should change
+    TimerT<Pelican> *myTimer;
+
+  private:
+    //  prevent general use of copy ctor and operator=
+    Pelican(const Pelican &);
+    Pelican &operator=(const Pelican &);
+};
+
+#endif

397/SolutionEx33Bonus/Pole.cpp

@@ -0,0 +1,59 @@
+#include "Pole.h"
+#include "Screen.h"
+
+Pole::Pole(int x, int y) : waitLight(new Light("WAIT", x + 6, y + 12, Screen::WHITE)) {
+    using namespace Screen; // we will discuss namespaces in the course
+
+    lights[RED_LIGHT] = new Light("*", x + 11, y + 3, RED);
+    lights[RED_MAN] = new Light("*<-=", x + 6, y + 4, RED);
+    lights[YELLOW_LIGHT] = new Light("*", x + 11, y + 5, YELLOW);
+    lights[GREEN_LIGHT] = new Light("*", x + 11, y + 7, GREEN);
+    lights[GREEN_MAN] = new Light("*|-<", x + 6, y + 7, GREEN);
+
+    write("       _____         ", x, ++y, GRAY);
+    write("      /___ /|        ", x, ++y, GRAY);
+    write("     |    | |        ", x, ++y, GRAY);
+    write("     |    |/|        ", x, ++y, GRAY);
+    write("     |____| |        ", x, ++y, GRAY);
+    write("     |    |/|        ", x, ++y, GRAY);
+    write("     |    | |        ", x, ++y, GRAY);
+    write("     |____|/         ", x, ++y, GRAY);
+    write("       _||__         ", x, ++y, GRAY);
+    write("      /___ /|        ", x, ++y, GRAY);
+    write("     |    | |        ", x, ++y, GRAY);
+    write("     |    | |        ", x, ++y, GRAY);
+    write("     |____|/         ", x, ++y, GRAY);
+    write("        ||           ", x, ++y, GRAY);
+    write("        ||           ", x, ++y, GRAY);
+    write("        ||           ", x, ++y, GRAY);
+    write("        ||           ", x, ++y, GRAY);
+    write("        ||           ", x, ++y, GRAY);
+    write("        ||           ", x, ++y, GRAY);
+    write("========||===========", x, ++y, GRAY);
+    write("    /   ||     /     ", x, ++y, GRAY);
+    write("_ /_________ /_      ", x, ++y, GRAY);
+    write("/          /         ", x, ++y, GRAY);
+}
+
+Pole::~Pole() {
+    for (int i = 0; i < sizeof lights / sizeof(lights[0]); ++i)
+        delete lights[i];
+    delete waitLight;
+}
+
+void Pole::setTrafficLights(Pelican::PelicanState state) {
+    static const Light::LightState LightStates[Pelican::YELLOW_STATE + 1][RED_MAN + 1] = {
+        //  red         yellow        green       green man     red man
+        {Light::ON, Light::OFF, Light::OFF, Light::ON, Light::OFF},       // red
+        {Light::OFF, Light::FLASH, Light::OFF, Light::FLASH, Light::OFF}, // y flash
+        {Light::OFF, Light::OFF, Light::ON, Light::OFF, Light::ON},       // g time
+        {Light::OFF, Light::OFF, Light::ON, Light::OFF, Light::ON},       // g idle
+        {Light::OFF, Light::ON, Light::OFF, Light::OFF, Light::ON}        // yellow
+    };
+
+    for (int i = RED_LIGHT; i <= RED_MAN; i++) {
+        lights[i]->set(LightStates[state][i]);
+    }
+}
+
+void Pole::setWaitLight(bool pressed) { waitLight->set(pressed ? Light::ON : Light::OFF); }

397/SolutionEx33Bonus/Pole.h

@@ -0,0 +1,24 @@
+
+#ifndef POLE_H
+#define POLE_H
+
+#include "Light.h"
+#include "Pelican.h"
+
+class Pole {
+  public:
+    Pole(int x, int y);
+    ~Pole();
+
+    void setTrafficLights(Pelican::PelicanState state);
+    void setWaitLight(bool pressed);
+
+  private:
+    enum LightName { RED_LIGHT, YELLOW_LIGHT, GREEN_LIGHT, GREEN_MAN, RED_MAN };
+
+    Light *lights[RED_MAN + 1];
+
+    Light *waitLight;
+};
+
+#endif

397/SolutionEx33Bonus/Timer.cpp

@@ -0,0 +1,23 @@
+
+
+#include "Timer.h"
+#include "TimerSet.h"
+
+void Timer::timeoutRequest(int seconds) { timeToGo = seconds; }
+
+Timer::Timer() : timeToGo(-1) { TimerSet::Instance().addATimer(this); }
+
+void Timer::tick() {
+    if (isExpired()) {
+        doExpired();
+    }
+}
+
+bool Timer::isExpired() {
+    if (timeToGo > 0) {
+        if (--timeToGo == 0) {
+            return true;
+        }
+    }
+    return false;
+}

397/SolutionEx33Bonus/Timer.h

@@ -0,0 +1,32 @@
+// ======================================================
+//
+// A general-purpose countdown timer
+// To use this class, specialize it
+// and override tick()
+//
+// ======================================================
+
+#ifndef timer_H
+#define timer_H
+
+#include <ctime>
+
+class Timer {
+  public:
+    Timer();
+
+    void timeoutRequest(int seconds);
+
+    // template method
+    void tick();
+
+  protected:
+    bool isExpired();
+
+  private:
+    virtual void doExpired() = 0;
+
+    int timeToGo;
+};
+
+#endif

397/SolutionEx33Bonus/TimerSet.cpp

@@ -0,0 +1,24 @@
+#include "TimerSet.h"
+#include "Timer.h"
+#include <iostream>
+
+TimerSet::TimerSet() : previousTime(time(nullptr)) {}
+
+void TimerSet::addATimer(Timer *t) { timers.push_back(t); }
+
+void TimerSet::pollAllTimers() {
+    std::time_t timeNow;
+    if (time(&timeNow) > previousTime) {
+        previousTime = timeNow;
+
+        for (auto it = timers.begin(); it != timers.end(); it++) {
+            (*it)->tick();
+        }
+    }
+}
+
+TimerSet &TimerSet::Instance() {
+    // Meyer's Singleton implementation
+    static TimerSet pInstance;
+    return pInstance;
+}

397/SolutionEx33Bonus/TimerSet.h

@@ -0,0 +1,29 @@
+#ifndef TIMERSET_H
+#define TIMERSET_H
+
+#include <ctime>
+#include <vector>
+
+class Timer;
+
+class TimerSet {
+  public:
+    void pollAllTimers();
+    void addATimer(Timer *);
+
+  private:
+    TimerSet();
+    std::vector<Timer *> timers;
+    std::time_t previousTime;
+
+    //  Meyer's singleton
+  public:
+    static TimerSet &Instance();
+
+  private:
+    // prevent copying and assignment of the singleton
+    TimerSet(const TimerSet &);
+    TimerSet &operator=(const TimerSet &);
+};
+
+#endif

397/SolutionEx33Bonus/TimerT.h

@@ -0,0 +1,23 @@
+// ======================================================
+//
+// Template for derievd Timers
+//
+// ======================================================
+
+#ifndef TIMERT_H
+#define TIMERT_H
+
+#include "Timer.h"
+
+template <class Target> class TimerT : public Timer {
+  public:
+    typedef void (Target::*TargetFunc)();
+    TimerT(Target &target, TargetFunc targetFunc) : myTarget(target), myTargetFunc(targetFunc) {}
+
+  private:
+    void doExpired() { (myTarget.*myTargetFunc)(); }
+    Target &myTarget;
+    TargetFunc myTargetFunc;
+};
+
+#endif

397/SolutionEx33Bonus/main.cpp

@@ -0,0 +1,29 @@
+
+
+#include "Keyboard.h"
+#include "Pelican.h"
+#include "TimerSet.h"
+
+#include <cctype> // provides toupper()
+
+int main() {
+    Keyboard kbd;
+    Pelican thePelican(30, 0);
+
+    char c = 0;
+
+    while (std::toupper(c) != 'Q') { // loop until 'Q' is pressed
+
+        while (!kbd.isCharAvail()) {
+            TimerSet::Instance().pollAllTimers(); // no key press to process, poll the timers
+        }
+
+        c = kbd.getChar(); // get the character
+        if (c == ' ') {
+            // it's a space, so press the WAIT button
+            thePelican.press();
+        }
+    }
+
+    return 0;
+}