implement fixed width printing
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@ -7,13 +7,13 @@
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* << Operators fuer die wichtigsten der vordefinierten *
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* Datentypen und realisiert somit die bekannte Ausgabe- *
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* funktion der C++ iO_Stream Bibliothek. Zur Zeit wird *
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* die Darstellung von Zeichen, Zeichenketten und ganzen *
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* die Darstellung von Zeichen, Zeichenketten und ganzen *
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* Zahlen unterstuetzt. Ein weiterer << Operator erlaubt *
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* die Verwendung von Manipulatoren. *
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* *
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* Neben der Klasse OutStream sind hier auch die *
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* Manipulatoren hex, dec, oct und bin fuer die Wahl der *
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* Basis bei der Zahlendarstellung, sowie endl fuer den *
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* Basis bei der Zahlendarstellung, sowie endl fuer den *
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* Zeilenumbruch definiert. *
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* *
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* Autor: Olaf Spinczyk, TU Dortmund *
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@ -24,17 +24,51 @@
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#include "lib/StringBuffer.h"
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// NOTE: I added this, stream manipulator with argument
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class OutStream;
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// TODO: Should this only work for the next << ?
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class fillw {
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public:
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fillw(unsigned char w) : w(w) {};
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unsigned char w;
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};
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class fillc {
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public:
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fillc(char c) : c(c) {};
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char c;
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};
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class OutStream : public StringBuffer {
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private:
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OutStream(const OutStream ©); // Verhindere Kopieren
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// NOTE: I added this
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unsigned char fill_used; // indicates how many characters are already used by the text internally
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void fill_use_char(); // recognizes that one char from the print width has been used up
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void fill_finalize(); // does the filling after text has been written to buffer
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public:
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int base; // Basis des Zahlensystems: z.B. 2, 8, 10 oder 16
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OutStream () : StringBuffer () { base = 10; } // initial Dezimalsystem
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// NOTE: I added this
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unsigned char fill_width;
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char fill_char; // fill character for fixed width
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virtual void flush () = 0; // weiterhin undefiniert
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OutStream () : StringBuffer () {
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base = 10; // initial Dezimalsystem
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fill_width = 0; // no fixed width
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fill_used = 0;
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fill_char = ' '; // fill with spaces
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}
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void flush() override = 0; // weiterhin undefiniert aber public
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// NOTE: I added this
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void put(char c) override;
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// OPERATOR << : Umwandlung des angegebenen Datentypes in eine
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// Zeichenkette.
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@ -57,9 +91,12 @@ public:
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// Darstellung eines Zeigers als hexadezimale ganze Zahl
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OutStream& operator << (void* ptr);
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// NOTE: I added this, set fixed output width
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OutStream &operator << (const fillw &w);
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OutStream &operator << (const fillc &c);
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// Aufruf einer Manipulatorfunktion
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OutStream& operator << (OutStream& (*f) (OutStream&));
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};
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