initial

hpglparser.cpp

@@ -0,0 +1,124 @@
+// 
+// 
+// 
+
+#include "hpglparser.h"
+
+String buffer = "";
+unsigned int bufferPosition = 0;
+
+bool isWhitespace(const char ch)
+{
+    return ch == ' ' || ch == '\n';
+}
+
+void addToBuffer(char ch)
+{
+	buffer += ch;
+}
+
+void setBuffer(String in)
+{
+    buffer = in;
+}
+
+void purgeBuffer()
+{
+	buffer = buffer.substring(bufferPosition);
+	bufferPosition = 0;
+}
+bool isBufferEmpty()
+{
+	return bufferPosition<buffer.length();
+}
+
+bool isBufferFull()
+{
+	return (buffer.length()>40  && (!buffer.indexOf("LB"))>=0);
+}
+
+bool isNumber(char ch)
+{
+	return ch=='-' || isdigit(ch);
+}
+
+void skipWhitespaces()
+{
+	//preskoc non-alpha
+	while(bufferPosition<buffer.length() && isWhitespace(buffer[bufferPosition]))
+	{
+		bufferPosition++;
+	}
+}
+
+bool tryReadInt(uint16_t *i)
+{
+	skipWhitespaces();
+	char ch = buffer[bufferPosition];
+	if (isNumber(ch))
+	{
+		unsigned int p = bufferPosition;
+		while(bufferPosition<buffer.length() && isNumber(buffer[bufferPosition]))
+		{
+			bufferPosition++;
+		}
+		String s = buffer.substring(p,bufferPosition);
+		*i = s.toInt();
+		return true;
+	}
+	return false;
+}
+
+bool isSeparator(char ch)
+{
+	return isWhitespace(ch) || ch==',';
+}
+
+bool readSeparator()
+{
+	bool b = false;
+	while(bufferPosition<buffer.length() && isSeparator(buffer[bufferPosition]))
+	{
+		b = true;
+		bufferPosition++;
+	}
+	return b;
+}
+
+bool tryReadPoint(Point *pt)
+{
+	uint16_t i;
+	if (!tryReadInt(&i))
+		return false;
+	(*pt).x = i;
+	if (!readSeparator())
+		return false;
+	if (!tryReadInt(&i))
+		return false;
+	(*pt).y = i;
+        
+	return true;
+}
+
+String readHpglCmd()
+{
+	while(bufferPosition<buffer.length() && !isalpha(buffer[bufferPosition]))
+	{
+		bufferPosition++;
+	}
+	String cmd = buffer.substring(bufferPosition, bufferPosition + 2);
+	bufferPosition+=2;
+	return cmd;
+}
+
+String readStringUntil(char ch)
+{
+	unsigned int pos=bufferPosition;
+	while(bufferPosition<buffer.length() && buffer[bufferPosition]!=ch)
+	{
+		bufferPosition++;
+	}
+	String result = buffer.substring(pos, bufferPosition);
+	bufferPosition++;
+	return result;
+}