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1 | /* | |
2 | * (C) Copyright 2014 Leo C. <erbl259-lmu@yahoo.de> | |
3 | * | |
4 | * SPDX-License-Identifier: GPL-2.0+ | |
5 | */ | |
6 | ||
7 | #include <string.h> | |
8 | #include "common.h" | |
9 | ||
10 | #include "serial.h" | |
11 | #include "background.h" | |
12 | #include "con-utils.h" | |
13 | ||
14 | uint_fast8_t tstc(void) | |
15 | { | |
16 | bg_shed(); | |
17 | return serial_tstc(); | |
18 | } | |
19 | ||
20 | int my_getchar(uint_fast8_t waitforchar) | |
21 | { | |
22 | int c; | |
23 | ||
24 | do { | |
25 | bg_shed(); | |
26 | c = serial_getc(); | |
27 | } while ((c < 0) && waitforchar); | |
28 | ||
29 | return c; | |
30 | } | |
31 | ||
32 | ||
33 | /* test if ctrl-c was pressed */ | |
34 | ||
35 | static uint_fast8_t ctrlc_disabled; /* see disable_ctrl() */ | |
36 | static uint_fast8_t ctrlc_was_pressed; | |
37 | ||
38 | uint_fast8_t ctrlc(void) | |
39 | { | |
40 | if (!ctrlc_disabled) { | |
41 | switch (serial_getc()) { | |
42 | case 0x03: /* ^C - Control C */ | |
43 | ctrlc_was_pressed = 1; | |
44 | return 1; | |
45 | default: | |
46 | break; | |
47 | } | |
48 | } | |
49 | return 0; | |
50 | } | |
51 | ||
52 | /* Reads user's confirmation. | |
53 | Returns 1 if user's input is "y", "Y", "yes" or "YES" | |
54 | */ | |
55 | uint_fast8_t confirm_yesno(void) | |
56 | { | |
57 | unsigned int i; | |
58 | char str_input[5]; | |
59 | ||
60 | /* Flush input */ | |
61 | while (serial_getc()) | |
62 | ; | |
63 | i = 0; | |
64 | while (i < sizeof(str_input)) { | |
65 | str_input[i] = my_getchar(1); | |
66 | putchar(str_input[i]); | |
67 | if (str_input[i] == '\r') | |
68 | break; | |
69 | i++; | |
70 | } | |
71 | putchar('\n'); | |
72 | if (strncmp(str_input, "y\r", 2) == 0 || | |
73 | strncmp(str_input, "Y\r", 2) == 0 || | |
74 | strncmp(str_input, "yes\r", 4) == 0 || | |
75 | strncmp(str_input, "YES\r", 4) == 0) | |
76 | return 1; | |
77 | return 0; | |
78 | } | |
79 | ||
80 | /* pass 1 to disable ctrlc() checking, 0 to enable. | |
81 | * returns previous state | |
82 | */ | |
83 | uint_fast8_t disable_ctrlc(uint_fast8_t disable) | |
84 | { | |
85 | uint_fast8_t prev = ctrlc_disabled; /* save previous state */ | |
86 | ||
87 | ctrlc_disabled = disable; | |
88 | return prev; | |
89 | } | |
90 | ||
91 | uint_fast8_t had_ctrlc (void) | |
92 | { | |
93 | return ctrlc_was_pressed; | |
94 | } | |
95 | ||
96 | void clear_ctrlc(void) | |
97 | { | |
98 | ctrlc_was_pressed = 0; | |
99 | } |