summaryrefslogtreecommitdiffstats
path: root/lib/librte_cmdline/cmdline_vt100.c
blob: 662fc7345b3bb035d388193d4986f195fac30857 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2010-2014 Intel Corporation.
 * Copyright (c) 2009, Olivier MATZ <zer0@droids-corp.org>
 * All rights reserved.
 */

#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <ctype.h>
#include <termios.h>

#include "cmdline_vt100.h"

const char *cmdline_vt100_commands[] = {
	vt100_up_arr,
	vt100_down_arr,
	vt100_right_arr,
	vt100_left_arr,
	"\177",
	"\n",
	"\001",
	"\005",
	"\013",
	"\031",
	"\003",
	"\006",
	"\002",
	vt100_suppr,
	vt100_tab,
	"\004",
	"\014",
	"\r",
	"\033\177",
	vt100_word_left,
	vt100_word_right,
	"?",
	"\027",
	"\020",
	"\016",
	"\033\144",
	vt100_bs,
};

void
vt100_init(struct cmdline_vt100 *vt)
{
	if (!vt)
		return;
	vt->state = CMDLINE_VT100_INIT;
}


static int
match_command(char *buf, unsigned int size)
{
	const char *cmd;
	size_t cmdlen;
	unsigned int i = 0;

	for (i=0 ; i<sizeof(cmdline_vt100_commands)/sizeof(const char *) ; i++) {
		cmd = *(cmdline_vt100_commands + i);

		cmdlen = strnlen(cmd, CMDLINE_VT100_BUF_SIZE);
		if (size == cmdlen &&
		    !strncmp(buf, cmd, cmdlen)) {
			return i;
		}
	}

	return -1;
}

int
vt100_parser(struct cmdline_vt100 *vt, char ch)
{
	unsigned int size;
	uint8_t c = (uint8_t) ch;

	if (!vt)
		return -1;

	if (vt->bufpos >= CMDLINE_VT100_BUF_SIZE) {
		vt->state = CMDLINE_VT100_INIT;
		vt->bufpos = 0;
	}

	vt->buf[vt->bufpos++] = c;
	size = vt->bufpos;

	switch (vt->state) {
	case CMDLINE_VT100_INIT:
		if (c == 033) {
			vt->state = CMDLINE_VT100_ESCAPE;
		}
		else {
			vt->bufpos = 0;
			goto match_command;
		}
		break;

	case CMDLINE_VT100_ESCAPE:
		if (c == 0133) {
			vt->state = CMDLINE_VT100_ESCAPE_CSI;
		}
		else if (c >= 060 && c <= 0177) { /* XXX 0177 ? */
			vt->bufpos = 0;
			vt->state = CMDLINE_VT100_INIT;
			goto match_command;
		}
		break;

	case CMDLINE_VT100_ESCAPE_CSI:
		if (c >= 0100 && c <= 0176) {
			vt->bufpos = 0;
			vt->state = CMDLINE_VT100_INIT;
			goto match_command;
		}
		break;

	default:
		vt->bufpos = 0;
		break;
	}

	return -2;

 match_command:
	return match_command(vt->buf, size);
}