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         /*move the head up one. the head always points at the last written data*/
   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-1) {
  12 //              printf("buffer overflow\n");
  13                 p_Buffer->head -= (BUFFER_SIZE-1);      /*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                 if (p_Buffer->tail >=BUFFER_SIZE) p_Buffer->tail -= BUFFER_SIZE;/*wrap the tail around the buffer*/
  21 //              printf("%d\n",p_Buffer->tail);
  22
  23         }
  24
  25
  26
  27
  28
  29
  30
  31         p_Buffer->message_level[p_Buffer->head]=message_level; /*copy the message level*/
  32         x=p_Buffer->head;
  33
  34
  35
  36         strcpy(p_Buffer->message[p_Buffer->head],message); /*copy the message*/
  37 //      printf("copied %s into p_Buffer->message[p_Buffer->head]: %s\n",message,p_Buffer->message[p_Buffer->head]);
  38 //      printf("extra %s\n",p_Buffer->message[p_Buffer->head]);
  39
  40         if (p_Buffer->message_level[p_Buffer->head]<=DEBUG_LEVEL){
  41 //              printf("printing buffer 1\n");
  42                 /* the print buffer sfunction is not working this is just a quick fix*/
  43 //              print_buffer(p_Buffer,1); /*if the debug level is higher enough then print the new message*/
  44                 printf("%s\n",p_Buffer->message[p_Buffer->head]);
  45         }
  46 }
  47 void print_buffer(buffer *p_Buffer, int number_of_messages_to_print){
  48         int x=0;
  49         int i=0;
  50         printf("print buffer\n");
  51         printf("buffer head:%d\n",p_Buffer->head);
  52         printf("buffer tail:%d\n",p_Buffer->tail);
  53
  54         if (number_of_messages_to_print==PRINT_ALL) number_of_messages_to_print=BUFFER_SIZE;
  55 //      printf("number_of_messages_to_print=%d\n",number_of_messages_to_print);
  56         for (i=0,x=0; (x>=p_Buffer->tail) && (i<number_of_messages_to_print); i++, x--){
  57 //              printf("printing buffer\n");
  58 //              printf("x:%d\n",x);
  59                 if (x<0) x = BUFFER_SIZE-1;             /*wrap x around buffer*/
  60                 printf("%s\n",p_Buffer->message[p_Buffer->head]);
  61                 printf("printed buffer\n");
  62         }
  63
  64 }
  65