util/kconfig/toada.c

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 #include <ctype.h>
   4 #include <stdio.h>
   5 #include <string.h>
   6 #include <stdbool.h>
   7
   8 static void print_bool(const char *const name, const bool val)
   9 {
  10         printf("   %-46s : constant boolean := %s;\n",
  11                name, val ? "true" : "false");
  12 }
  13
  14 static void print_hex(const char *const name, const char *val)
  15 {
  16         unsigned int hexlen;
  17
  18         printf("   %-46s : constant         := 16#", name);
  19         for (hexlen = strlen(val); hexlen > 0;) {
  20                 const unsigned int len = hexlen % 4 ? : 4;
  21                 char quad[] = "0000";
  22                 unsigned int i;
  23
  24                 for (i = 0; i < len; ++i)
  25                         quad[4 - len + i] = val[i];
  26                 printf("%s", quad);
  27
  28                 val += len;
  29                 hexlen -= len;
  30                 if (hexlen > 0)
  31                         printf("_");
  32         }
  33         printf ("#;\n");
  34 }
  35
  36 static void print_dec(const char *const name, const char *const val)
  37 {
  38         printf("   %-46s : constant         := %s;\n", name, val);
  39 }
  40
  41 static void print_string(const char *const name, const char *const val)
  42 {
  43         printf("   %-46s : constant string  := \"%s\";\n", name, val);
  44 }
  45
  46 int main(int argc, char *argv[])
  47 {
  48         char unset_fmt[256], string_fmt[256], set_fmt[256], line[256];
  49         char *prefix = "CONFIG", *package = "KConfig";
  50
  51         if (argc > 3) {
  52                 fprintf(stderr,
  53                         "Usage: %s [<package name> [<config prefix>]]\n\n",
  54                         argv[0]);
  55                 return 1;
  56         }
  57         if (argc > 2)
  58                 prefix = argv[2];
  59         if (argc > 1)
  60                 package = argv[1];
  61
  62         snprintf(set_fmt, sizeof(set_fmt), "%s_%%255[^=]=%%255s", prefix);
  63         snprintf(string_fmt, sizeof(string_fmt),
  64                  "%s_%%255[^=]=\"%%255[^\"]\"", prefix);
  65         snprintf(unset_fmt, sizeof(unset_fmt),
  66                  "# %s_%%255s is not set", prefix);
  67
  68         printf("package %s is\n\n", package);
  69
  70         while (fgets(line, sizeof(line), stdin)) {
  71                 char name[256], val[256];
  72
  73                 if (line[strlen(line) - 1] != '\n') {
  74                         fprintf(stderr,
  75                                 "Line longer than %zu chars, skipping...\n",
  76                                 sizeof(line) - 1);
  77                         while (fgets(line, sizeof(line), stdin)) {
  78                                 if (line[strlen(line) - 1] == '\n')
  79                                         break;
  80                         }
  81                         continue;
  82                 }
  83
  84                 if (sscanf(line, unset_fmt, name) == 1) {
  85                         print_bool(name, false);
  86                         continue;
  87                 }
  88
  89                 if (sscanf(line, string_fmt, name, val) == 2) {
  90                         print_string(name, val);
  91                         continue;
  92                 }
  93
  94                 switch (sscanf(line, set_fmt, name, val)) {
  95                 case 1:
  96                         /* ignore for now, our Kconfig is full of these atm */
  97                         /* fprintf(stderr, "unset non-bool: %s=\n", name); */
  98                         continue;
  99                 case 2:
 100                         if (strcmp(val, "\"\"") == 0) {
 101                                 print_string(name, "");
 102                         } else if (strcmp(val, "y") == 0) {
 103                                 print_bool(name, true);
 104                         } else if (strncmp(val, "0x", 2) == 0) {
 105                                 print_hex(name, val + 2);
 106                         } else if (isdigit(val[0])) {
 107                                 print_dec(name, val);
 108                         } else {
 109                                 fprintf(stderr,
 110                                         "couldn't parse value '%s' for '%s'\n",
 111                                         val, name);
 112                         }
 113                         continue;
 114                 default:
 115                         break;
 116                 }
 117
 118                 unsigned int i = 0;
 119                 while (isspace(line[i]))
 120                         ++i;
 121                 if (line[i] == '#') {
 122                         printf("   --%s", line + i + 1);
 123                         continue;
 124                 } else if (i == strlen(line)) {
 125                         continue;
 126                 }
 127
 128                 fprintf(stderr, "spurious line:\n%s", line);
 129         }
 130
 131         printf("\nend %s;\n", package);
 132         return 0;
 133 }