direct/timothy_tests/message_buffer.c

   1 #include "message_buffer.h"
   2
   3
   4 void add_to_buffer(buffer *p_Buffer, char message[],char message_level){
   5         unsigned int x=0;
   6
   7         p_Buffer->head++;
   8
   9         printf("p_Buffer->tail=%d\n",p_Buffer->tail);
  10         printf("p_Buffer->head=%d\n",p_Buffer->head);
  11         if (p_Buffer->head >=BUFFER_SIZE) {
  12                 printf("buffer overflow\n");
  13                 p_Buffer->head -= BUFFER_SIZE;  /*wrap the head around the buffer*/
  14                 printf("new p_Buffer->head=%d\n",p_Buffer->head);
  15
  16         /*if the buffer is full then delete last entry by moving the tail*/
  17         if (p_Buffer->head==p_Buffer->tail){
  18                 printf("moving buffer tail from %d to ",p_Buffer->tail);
  19                 p_Buffer->tail++;
  20                 printf("%d\n",p_Buffer->tail);
  21                 if (p_Buffer->tail >=BUFFER_SIZE) p_Buffer->tail -= BUFFER_SIZE;/*wrap the tail around the buffer*/
  22         }
  23
  24         /*move the head up one. the head always points at the last written data*/
  25
  26
  27
  28         }
  29
  30         p_Buffer->message_level[p_Buffer->head]=message_level; /*copy the message level*/
  31         x=p_Buffer->head;
  32
  33
  34
  35         strcpy(p_Buffer->message[p_Buffer->head],message); /*copy the message*/
  36 /*
  37         //convert the message into a string so it can be printed cleanly
  38         if (message[length_of_message-1]!='\0') p_Buffer->message[p_Buffer->head][x+1]='\0';
  39 */
  40         if (p_Buffer->message_level[p_Buffer->head]<=DEBUG_LEVEL){
  41 //              printf("printing buffer 1\n");
  42                  print_buffer(p_Buffer,1); /*if the debug level is higher enough then print the new message*/
  43         }
  44 }
  45 void print_buffer(buffer *p_Buffer, int number_of_messages_to_print){
  46 /*      printf("print buffer\n");
  47         printf("buffer head:%d\n",p_Buffer->head);
  48         printf("buffer tail:%d\n",p_Buffer->tail);
  49 */      int x;
  50         int i;
  51         if (number_of_messages_to_print==PRINT_ALL) number_of_messages_to_print=BUFFER_SIZE;
  52 //      printf("number_of_messages_to_print=%d\n",number_of_messages_to_print);
  53         for (i=0,x=p_Buffer->head; (x>=p_Buffer->tail) && (i<number_of_messages_to_print); i++, x--){
  54 //              printf("printing bufer\n");
  55                 //printf("x:%d\n",x);
  56                 if (x<0) x = BUFFER_SIZE;               /*wrap x around buffer*/
  57                 printf("%s\n",p_Buffer->message[x]);
  58         }
  59
  60 }
  61