summaryrefslogtreecommitdiff
path: root/util/kconfig/toada.c
blob: 1717fd040fb717cb19c97be2a9b18b485dc214b2 (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
133
134
/* This file is part of the coreboot project. */
/* SPDX-License-Identifier: GPL-2.0-or-later */

#include <ctype.h>
#include <stdio.h>
#include <string.h>
#include <stdbool.h>

static void print_bool(const char *const name, const bool val)
{
	printf("   %-46s : constant boolean := %s;\n",
	       name, val ? "true" : "false");
}

static void print_hex(const char *const name, const char *val)
{
	unsigned int hexlen;

	printf("   %-46s : constant         := 16#", name);
	for (hexlen = strlen(val); hexlen > 0;) {
		const unsigned int len = hexlen % 4 ? : 4;
		char quad[] = "0000";
		unsigned int i;

		for (i = 0; i < len; ++i)
			quad[4 - len + i] = val[i];
		printf("%s", quad);

		val += len;
		hexlen -= len;
		if (hexlen > 0)
			printf("_");
	}
	printf ("#;\n");
}

static void print_dec(const char *const name, const char *const val)
{
	printf("   %-46s : constant         := %s;\n", name, val);
}

static void print_string(const char *const name, const char *const val)
{
	printf("   %-46s : constant string  := \"%s\";\n", name, val);
}

int main(int argc, char *argv[])
{
	char unset_fmt[256], string_fmt[256], set_fmt[256], line[256];
	char *prefix = "CONFIG", *package = "KConfig";

	if (argc > 3) {
		fprintf(stderr,
			"Usage: %s [<package name> [<config prefix>]]\n\n",
			argv[0]);
		return 1;
	}
	if (argc > 2)
		prefix = argv[2];
	if (argc > 1)
		package = argv[1];

	snprintf(set_fmt, sizeof(set_fmt), "%s_%%255[^=]=%%255s", prefix);
	snprintf(string_fmt, sizeof(string_fmt),
		 "%s_%%255[^=]=\"%%255[^\"]\"", prefix);
	snprintf(unset_fmt, sizeof(unset_fmt),
		 "# %s_%%255s is not set", prefix);

	printf("package %s is\n\n", package);

	while (fgets(line, sizeof(line), stdin)) {
		char name[256], val[256];

		if (line[strlen(line) - 1] != '\n') {
			fprintf(stderr,
				"Line longer than %zu chars, skipping...\n",
				sizeof(line) - 1);
			while (fgets(line, sizeof(line), stdin)) {
				if (line[strlen(line) - 1] == '\n')
					break;
			}
			continue;
		}

		if (sscanf(line, unset_fmt, name) == 1) {
			print_bool(name, false);
			continue;
		}

		if (sscanf(line, string_fmt, name, val) == 2) {
			print_string(name, val);
			continue;
		}

		switch (sscanf(line, set_fmt, name, val)) {
		case 1:
			/* ignore for now, our Kconfig is full of these atm */
			/* fprintf(stderr, "unset non-bool: %s=\n", name); */
			continue;
		case 2:
			if (strcmp(val, "\"\"") == 0) {
				print_string(name, "");
			} else if (strcmp(val, "y") == 0) {
				print_bool(name, true);
			} else if (strncmp(val, "0x", 2) == 0) {
				print_hex(name, val + 2);
			} else if (isdigit(val[0])) {
				print_dec(name, val);
			} else {
				fprintf(stderr,
					"couldn't parse value '%s' for '%s'\n",
					val, name);
			}
			continue;
		default:
			break;
		}

		unsigned int i = 0;
		while (isspace(line[i]))
			++i;
		if (line[i] == '#') {
			printf("   --%s", line + i + 1);
			continue;
		} else if (i == strlen(line)) {
			continue;
		}

		fprintf(stderr, "spurious line:\n%s", line);
	}

	printf("\nend %s;\n", package);
	return 0;
}