X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs2.git;a=blobdiff_plain;f=direct%2Ftimothy_tests%2Fdev%2Fmessage_buffer.c;fp=direct%2Ftimothy_tests%2Fdev%2Fmessage_buffer.c;h=5a5696e58c51d47e22a5f3ec870d12744a6f9657;hp=0000000000000000000000000000000000000000;hb=86231ed7a8ebecf2e4821f9b426262045f941591;hpb=a34826e701dd381a293bb90b25a48d2bd58e8de8

diff --git a/direct/timothy_tests/dev/message_buffer.c b/direct/timothy_tests/dev/message_buffer.c
new file mode 100644
index 0000000..5a5696e
--- /dev/null
+++ b/direct/timothy_tests/dev/message_buffer.c
@@ -0,0 +1,90 @@
+/*
+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2010 Aleph One Ltd.
+ *   for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Timothy Manning <timothy@yaffs.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * message_buffer.c contains code for a message buffer .
+ */
+
+#include "message_buffer.h"
+
+void append_to_buffer(buffer *p_Buffer, char *message,char message_level,char print){
+	/*wrapper function for add_to_buffer_root_function*/
+	add_to_buffer_root_function(p_Buffer,message, message_level,APPEND_MESSAGE,print);
+}
+
+void add_to_buffer(buffer *p_Buffer, char *message,char message_level,char print){
+	/*wrapper function for add_to_buffer_root_function*/
+	add_to_buffer_root_function(p_Buffer,message, message_level,DO_NOT_APPEND_MESSAGE,print);
+}
+
+void add_to_buffer_root_function(buffer *p_Buffer, char *message,char message_level,char append,char print){
+
+	if (append==APPEND_MESSAGE){	/* append current message*/
+		strncat(p_Buffer->message[p_Buffer->head],message,BUFFER_MESSAGE_LENGTH);
+	}
+	else {
+
+		/*move the head up one. the head always points at the last written data*/
+		p_Buffer->head++;
+
+		/*printf("p_Buffer->tail=%d\n",p_Buffer->tail);*/
+		/*printf("p_Buffer->head=%d\n",p_Buffer->head);*/
+		if (p_Buffer->head >=BUFFER_SIZE-1) {
+			/*printf("buffer overflow\n");*/
+			p_Buffer->head -= (BUFFER_SIZE-1);	/*wrap the head around the buffer*/
+			/*printf("new p_Buffer->head=%d\n",p_Buffer->head);*/
+		}	
+		/*if the buffer is full then delete last entry by moving the tail*/
+		if (p_Buffer->head==p_Buffer->tail){
+			/*printf("moving buffer tail from %d to ",p_Buffer->tail);*/
+			p_Buffer->tail++;	
+			if (p_Buffer->tail >=BUFFER_SIZE) p_Buffer->tail -= BUFFER_SIZE;/*wrap the tail around the buffer*/
+			/*printf("%d\n",p_Buffer->tail);*/
+
+		}
+
+		p_Buffer->message_level[p_Buffer->head]=message_level; /*copy the message level*/
+		strncpy(p_Buffer->message[p_Buffer->head],message,BUFFER_MESSAGE_LENGTH); /*copy the message*/
+		/*printf("copied %s into p_Buffer->message[p_Buffer->head]: %s\n",message,p_Buffer->message[p_Buffer->head]);
+		printf("extra %s\n",p_Buffer->message[p_Buffer->head]);*/
+	}
+	if ((p_Buffer->message_level[p_Buffer->head]<=DEBUG_LEVEL)&& (print==PRINT)){
+		/*printf("printing buffer 1\n");
+		// the print buffer function is not working this is just a quick fix		 
+		print_buffer(p_Buffer,1); //if the debug level is higher enough then print the new message  
+		*/
+		printf("%s\n",p_Buffer->message[p_Buffer->head]);
+	}
+}
+
+
+
+void print_buffer(buffer *p_Buffer, int number_of_messages_to_print){	
+	int x=0;
+	int i=0;
+	printf("print buffer\n");
+	printf("buffer head:%d\n",p_Buffer->head);
+	printf("buffer tail:%d\n",p_Buffer->tail);
+
+	if (number_of_messages_to_print==PRINT_ALL) number_of_messages_to_print=BUFFER_SIZE;
+//	printf("number_of_messages_to_print=%d\n",number_of_messages_to_print);
+	for (i=0,x=0; (x>=p_Buffer->tail) && (i<number_of_messages_to_print); i++, x--){
+//		printf("printing buffer\n");
+//		printf("x:%d\n",x);
+		if (x<0) x = BUFFER_SIZE-1;		/*wrap x around buffer*/
+		printf("%s\n",p_Buffer->message[p_Buffer->head]);
+		printf("printed buffer\n");
+	}
+
+}
+