Diff: TextDisplay.cpp

Revision:

0:a0faa86660d4

Child:

4:b02dfd360729

diff -r 000000000000 -r a0faa86660d4 TextDisplay.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TextDisplay.cpp	Wed Mar 18 10:57:16 2015 -0500
@@ -0,0 +1,92 @@
+/* mbed TextDisplay Display Library Base Class
+ * Copyright (c) 2007-2009 sford
+ * Released under the MIT License: http://mbed.org/license/mit
+ */
+ 
+#include "TextDisplay.h"
+#include <cstdarg>
+
+TextDisplay::TextDisplay(const char *name){
+    _row = 0;
+    _column = 0;
+
+    if (name == NULL) {
+        _path = NULL;
+    } else {
+        _path = new char[strlen(name) + 2];
+        sprintf(_path, "/%s", name);
+    }
+}
+    
+int TextDisplay::_putc(int value) {
+    if(value == '\n') {
+        _column = 0;
+        _row++;
+        if(_row >= rows()) {
+            _row = 0;
+        }
+    } else {
+        character(_column, _row, value);
+        _column++;
+        if(_column >= columns()) {
+            _column = 0;
+            _row++;
+            if(_row >= rows()) {
+                _row = 0;
+            }
+        }
+    }
+    return value;
+}
+
+// crude cls implementation, should generally be overwritten in derived class
+void TextDisplay::cls() {
+    locate(0, 0);
+    for(int i=0; i<columns()*rows(); i++) {
+        _putc(' ');
+    }
+}
+
+void TextDisplay::locate(int column, int row) {
+    _column = column;
+    _row = row;
+}
+
+int TextDisplay::_getc() {
+    return -1;
+}
+        
+void TextDisplay::foreground(uint16_t colour) {
+    _foreground = colour;
+}
+
+void TextDisplay::background(uint16_t colour) {
+    _background = colour;
+}
+
+bool TextDisplay::claim (FILE *stream) {
+    if ( _path == NULL) {
+        fprintf(stderr, "claim requires a name to be given in the instantiator of the TextDisplay instance!\r\n");
+        return false;
+    }
+    if (freopen(_path, "w", stream) == NULL) {
+        // Failed, should not happen
+        return false;
+    }
+    // make sure we use line buffering
+    setvbuf(stdout, NULL, _IOLBF, columns());
+    return true;
+} 
+
+void TextDisplay::printf(const char* format, ...) {
+	char buffer[MAX_PRINTF_CHARS + 1] = { 0 };
+	uint32_t iterator = 0;
+	va_list args;
+	va_start(args, format);
+	vsprintf(buffer, format, args);
+	va_end(args);
+
+	while((buffer[iterator] != 0) && (iterator < MAX_PRINTF_CHARS)) {
+		_putc(buffer[iterator++]);
+	}
+}