Reworked build system: makefiles replaced with in-program logic; core replaced with targets; preproc/ replaced with Wiring's; now prepend "#include "WProgram.h" instead of wiringlite.inc; new entries in preferences.txt; bundled Wiring libs.

targets/arduino/buffer.c

@@ -0,0 +1,110 @@
+/*! \file buffer.c \brief Multipurpose byte buffer structure and methods. */
+//*****************************************************************************
+//
+// File Name	: 'buffer.c'
+// Title		: Multipurpose byte buffer structure and methods
+// Author		: Pascal Stang - Copyright (C) 2001-2002
+// Created		: 9/23/2001
+// Revised		: 9/23/2001
+// Version		: 1.0
+// Target MCU	: any
+// Editor Tabs	: 4
+//
+// This code is distributed under the GNU Public License
+//		which can be found at http://www.gnu.org/licenses/gpl.txt
+//
+//*****************************************************************************
+
+#include "buffer.h"
+
+// global variables
+
+// initialization
+
+void bufferInit(cBuffer* buffer, unsigned char *start, unsigned short size)
+{
+	// set start pointer of the buffer
+	buffer->dataptr = start;
+	buffer->size = size;
+	// initialize index and length
+	buffer->dataindex = 0;
+	buffer->datalength = 0;
+}
+
+// access routines
+unsigned char  bufferGetFromFront(cBuffer* buffer)
+{
+	unsigned char data = 0;
+	
+	// check to see if there's data in the buffer
+	if(buffer->datalength)
+	{
+		// get the first character from buffer
+		data = buffer->dataptr[buffer->dataindex];
+		// move index down and decrement length
+		buffer->dataindex++;
+		if(buffer->dataindex >= buffer->size)
+		{
+			buffer->dataindex %= buffer->size;
+		}
+		buffer->datalength--;
+	}
+	// return
+	return data;
+}
+
+void bufferDumpFromFront(cBuffer* buffer, unsigned short numbytes)
+{
+	// dump numbytes from the front of the buffer
+	// are we dumping less than the entire buffer?
+	if(numbytes < buffer->datalength)
+	{
+		// move index down by numbytes and decrement length by numbytes
+		buffer->dataindex += numbytes;
+		if(buffer->dataindex >= buffer->size)
+		{
+			buffer->dataindex %= buffer->size;
+		}
+		buffer->datalength -= numbytes;
+	}
+	else
+	{
+		// flush the whole buffer
+		buffer->datalength = 0;
+	}
+}
+
+unsigned char bufferGetAtIndex(cBuffer* buffer, unsigned short index)
+{
+	// return character at index in buffer
+	return buffer->dataptr[(buffer->dataindex+index)%(buffer->size)];
+}
+
+unsigned char bufferAddToEnd(cBuffer* buffer, unsigned char data)
+{
+	// make sure the buffer has room
+	if(buffer->datalength < buffer->size)
+	{
+		// save data byte at end of buffer
+		buffer->dataptr[(buffer->dataindex + buffer->datalength) % buffer->size] = data;
+		// increment the length
+		buffer->datalength++;
+		// return success
+		return -1;
+	}
+	else return 0;
+}
+
+unsigned char bufferIsNotFull(cBuffer* buffer)
+{
+	// check to see if the buffer has room
+	// return true if there is room
+	return (buffer->datalength < buffer->size);
+}
+
+void bufferFlush(cBuffer* buffer)
+{
+	// flush contents of the buffer
+	buffer->datalength = 0;
+}
+