85 lines
2.9 KiB
C++
Executable File
85 lines
2.9 KiB
C++
Executable File
/*****************************************************************************
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* *
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* C G A _ S T R E A M *
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* *
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*---------------------------------------------------------------------------*
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* Beschreibung: Die Klasse CGA_Stream ermoeglicht die Ausgabe verschied. *
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* Datentypen als Zeichenketten auf dem CGA-Bildschirm eines*
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* PCs. Fuer weitergehende Formatierung oder spezielle *
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* Effekte stehen die Methoden der Klasse CGA zur *
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* Verfuegung. *
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* *
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* Autor: Olaf Spinczyk, TU Dortmund *
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* Aenderungen von Michael Schoettner, HHU, 06.04.20 *
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*****************************************************************************/
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#ifndef __CGA_Stream_include__
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#define __CGA_Stream_include__
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#include "devices/CGA.h"
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#include "lib/OutStream.h"
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#include "lib/Semaphore.h"
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// NOTE: I added these classes to allow for easier stream-like color changing
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class fgc {
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public:
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constexpr fgc(const CGA::color fg) : fg(fg) {}
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const CGA::color fg;
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};
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// NOTE: I could have used a struct to remove the public, but I like to use
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// structs exclusively for C like memory "descriptions", although they're
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// techinally the same to classes
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class bgc {
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public:
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constexpr bgc(const CGA::color bg) : bg(bg) {} // Make this into a literal type to allow macro-like usage
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const CGA::color bg;
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};
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constexpr fgc white = fgc(CGA::WHITE);
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constexpr fgc black = fgc(CGA::BLACK);
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constexpr fgc green = fgc(CGA::GREEN);
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constexpr fgc red = fgc(CGA::RED);
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constexpr fgc lgrey = fgc(CGA::LIGHT_GREY);
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class CGA_Stream : public OutStream, public CGA {
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private:
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CGA_Stream(CGA_Stream& copy) = delete; // Verhindere Kopieren
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Semaphore sem;
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public:
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CGA::color color_fg;
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CGA::color color_bg;
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bool blink;
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CGA_Stream() : sem(1), color_fg(CGA::LIGHT_GREY), color_bg(CGA::BLACK), blink(false) {
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flush();
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}
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void lock() { sem.p(); }
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void unlock() { sem.v(); }
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// void lock() {}
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// void unlock() {}
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// Methode zur Ausgabe des Pufferinhalts der Basisklasse StringBuffer.
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void flush() override;
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// Change stream color
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template<typename T>
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// requires std::derived_from<T, CGA_Stream>
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friend T& operator<<(T& os, const fgc& fg) {
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os.flush();
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os.color_fg = fg.fg;
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return os;
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}
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template<typename T>
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// requires std::derived_from<T, CGA_Stream>
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friend T& operator<<(T& os, const bgc& bg) {
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os.flush();
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os.color_fg = bg.bg;
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return os;
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}
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};
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#endif
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