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  1. /* Functions for printing on console. */
  2.  
  3.  
  4. /* Methods:
  5.  * init_printing:   connects to SERVICE_CONSOLE and initializes used data structures
  6.  * print_console:   prints char* on console
  7.  * print_console_int:   prints int argument with specified conversion inside input string
  8.  */
  9.  
  10.  
  11. #include <string.h>
  12. #include <ipc/ipc.h>
  13. #include <ipc/services.h>
  14. #include <async.h>
  15. #include "fs.h"
  16. #include "../console/console.h"
  17.  
  18. #define TOTAL_CONVERSIONS   5
  19. #define BUFF_SIZE       10
  20.  
  21.  
  22. /* Table of printing conversions for: d, i, u, c, %. */
  23. char conversions[TOTAL_CONVERSIONS];
  24. char format_string[3] = "%";
  25.  
  26. static int validate_string(char conv);
  27.  
  28. int init_printing()
  29. {
  30.    
  31.     /* Attempt to connect to SERVICE_CONSOLE fail. */
  32.     if (!connect_to_con(&con_phone, CON_CONN_ATTEMPTS))
  33.         return FALSE;
  34.  
  35.     conversions[0] = 'd';
  36.     conversions[1] = 'i';
  37.     conversions[2] = 'u';
  38.     conversions[3] = 'c';
  39.     conversions[4] = '%';
  40.    
  41. }
  42.  
  43. int validate_string(char conv)
  44. {
  45.    
  46.     int i;
  47.    
  48.     /* Check if the conversion character matches conversions table. */
  49.     for (i = 0; i < TOTAL_CONVERSIONS; i++){
  50.         if (conv == conversions[i]) {
  51.             return TRUE;   
  52.         }
  53.     }
  54.  
  55.     return FALSE;  
  56. }
  57.  
  58. int print_console(char *str)
  59. {
  60.    
  61.     int i, len;
  62.     char c;
  63.    
  64.     /* Must be connected to the CONSOLE_SERVICE. */
  65.     if (con_phone < 0)
  66.         return FALSE;
  67.    
  68.     len = strlen(str);
  69.     if (len == 0)
  70.         return TRUE;
  71.    
  72.     for (i = 0; i < len; i++) {
  73.         c = *str++;
  74.         async_req_2(con_phone, CONSOLE_PUTCHAR, c, 0, NULL, NULL);  /* Do the work. */     
  75.     }
  76.  
  77.     return TRUE;
  78. }
  79.  
  80. int print_console_int(char *str, int arg)
  81. {
  82.    
  83.     int i, retval, len, front_side, offset;
  84.     char conversion;
  85.     char buffer[BUFF_SIZE];
  86.     char *front, *back;
  87.  
  88.     len = strlen(str);
  89.  
  90.     if (len == 0)
  91.         return TRUE;
  92.    
  93.     front = malloc((len+1) * sizeof(char));
  94.     back = malloc((len+1) * sizeof(char));
  95.    
  96.     front_side = TRUE;
  97.    
  98.     /* Copy front side of source string. */
  99.     for (i = 0; i < len; i++) {
  100.         if (str[i] == '%') {
  101.             front_side = FALSE;
  102.             break;
  103.         }
  104.         front[i] = str[i];
  105.     }
  106.    
  107.     /* Character '%' was not found. Print it in a normal way, without int argument. */
  108.     if (front_side) {
  109.         return (print_console(str));   
  110.     }
  111.    
  112.     /* Character '%' was the last in the input string - error. */
  113.     if (i == (len-1)) {
  114.         return FALSE;
  115.     }
  116.    
  117.     front[i] = '\0';
  118.     conversion = str[++i];
  119.     retval = validate_string(conversion);
  120.    
  121.     if (!retval) {
  122.            return FALSE;   
  123.     }
  124.    
  125.     offset = ++i;
  126.    
  127.     /* Copy back side of source string. */
  128.     for (;i < len; i++) {
  129.         back[i-offset] = str[i];
  130.     }
  131.  
  132.     back[i] = '\0';
  133.  
  134.     /* Two characters '%' in source string. */
  135.     if (conversion == '%') {
  136.         print_console(front);
  137.         print_console(back);
  138.         return TRUE;
  139.     }
  140.    
  141.     /* Other 'normal' case. */
  142.     print_console(front);
  143.     format_string[1] = conversion;
  144.     sprintf(buffer, format_string, arg);
  145.     print_console(buffer);
  146.     print_console(back);
  147.  
  148.     return TRUE;
  149. }
  150.