avr/con-utils.c

   1
   2 #include <string.h>
   3 #include <stdio.h>
   4
   5 #include "serial.h"
   6 #include "con-utils.h"
   7
   8
   9 uint_fast8_t tstc(void)
  10 {
  11         return serial_tstc();
  12 }
  13
  14 int my_getchar(void)
  15 {
  16         int c;
  17
  18         while((c = serial_getc()) < 0)
  19                 ;
  20         return c;
  21 }
  22
  23
  24 /* test if ctrl-c was pressed */
  25
  26 static uint_fast8_t ctrlc_disabled = 0; /* see disable_ctrl() */
  27 static uint_fast8_t ctrlc_was_pressed = 0;
  28
  29 uint_fast8_t ctrlc(void)
  30 {
  31         if (!ctrlc_disabled) {
  32                 switch (serial_getc()) {
  33                 case 0x03:              /* ^C - Control C */
  34                         ctrlc_was_pressed = 1;
  35                         return 1;
  36                 default:
  37                         break;
  38                 }
  39         }
  40         return 0;
  41 }
  42
  43 /* Reads user's confirmation.
  44    Returns 1 if user's input is "y", "Y", "yes" or "YES"
  45 */
  46 uint_fast8_t confirm_yesno(void)
  47 {
  48         unsigned int i;
  49         char str_input[5];
  50
  51         /* Flush input */
  52         while (serial_getc())
  53                 ;
  54         i = 0;
  55         while (i < sizeof(str_input)) {
  56                 str_input[i] = my_getchar();
  57                 putchar(str_input[i]);
  58                 if (str_input[i] == '\r')
  59                         break;
  60                 i++;
  61         }
  62         putchar('\n');
  63         if (strncmp(str_input, "y\r", 2) == 0 ||
  64             strncmp(str_input, "Y\r", 2) == 0 ||
  65             strncmp(str_input, "yes\r", 4) == 0 ||
  66             strncmp(str_input, "YES\r", 4) == 0)
  67                 return 1;
  68         return 0;
  69 }
  70
  71 /* pass 1 to disable ctrlc() checking, 0 to enable.
  72  * returns previous state
  73  */
  74 uint_fast8_t disable_ctrlc(uint_fast8_t disable)
  75 {
  76         uint_fast8_t prev = ctrlc_disabled;     /* save previous state */
  77
  78         ctrlc_disabled = disable;
  79         return prev;
  80 }
  81
  82 uint_fast8_t had_ctrlc (void)
  83 {
  84         return ctrlc_was_pressed;
  85 }
  86
  87 void clear_ctrlc(void)
  88 {
  89         ctrlc_was_pressed = 0;
  90 }
  91