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/* 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;
}
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