tools/textfilter.c

   1 #include <stdio.h>
   2 #include <string.h>
   3
   4
   5 static int check_defines(const char **defs, int defcount, char *tdef)
   6 {
   7         int i, len;
   8
   9         len = strlen(tdef);
  10         for (i = 0; i < len; i++)
  11                 if (tdef[i] == ' ' || tdef[i] == '\r' || tdef[i] == '\n') break;
  12         tdef[i] = 0;
  13
  14         for (i = 0; i < defcount; i++)
  15         {
  16                 if (strcmp(defs[i], tdef) == 0)
  17                         return 1;
  18         }
  19
  20         return 0;
  21 }
  22
  23
  24 static void do_counters(char *str)
  25 {
  26         static int counters[4] = { 1, 1, 1, 1 };
  27         char buff[1024];
  28         int counter;
  29         char *s = str;
  30
  31         while ((s = strstr(s, "@@")))
  32         {
  33                 if (s[2] < '0' || s[2] > '3') { s++; continue; }
  34
  35                 counter = s[2] - '0';
  36                 snprintf(buff, sizeof(buff), "%i%s", counters[counter]++, s + 3);
  37                 strcpy(s, buff);
  38         }
  39 }
  40
  41
  42 int main(int argc, char *argv[])
  43 {
  44         char buff[1024];
  45         FILE *fi, *fo;
  46         int skip_mode = 0, ifdef_level = 0, line = 0;
  47
  48         if (argc < 3)
  49         {
  50                 printf("usage:\n%s <file_in> <file_out> [defines...]\n", argv[0]);
  51                 return 1;
  52         }
  53
  54         fi = fopen(argv[1], "r");
  55         if (fi == NULL)
  56         {
  57                 printf("failed to open: %s\n", argv[1]);
  58                 return 2;
  59         }
  60
  61         fo = fopen(argv[2], "w");
  62         if (fo == NULL)
  63         {
  64                 printf("failed to open: %s\n", argv[2]);
  65                 return 3;
  66         }
  67
  68         for (++line; !feof(fi); line++)
  69         {
  70                 char *fgs;
  71
  72                 fgs = fgets(buff, sizeof(buff), fi);
  73                 if (fgs == NULL) break;
  74
  75                 if (buff[0] == '#')
  76                 {
  77                         /* control char */
  78                         if (strncmp(buff, "#ifdef ", 7) == 0)
  79                         {
  80                                 if (!check_defines((void *) &argv[3], argc-3, buff + 7)) skip_mode = 1;
  81                                 ifdef_level++;
  82                         }
  83                         else if (strncmp(buff, "#ifndef ", 8) == 0)
  84                         {
  85                                 if ( check_defines((void *) &argv[3], argc-3, buff + 7)) skip_mode = 1;
  86                                 ifdef_level++;
  87                         }
  88                         else if (strncmp(buff, "#else", 5) == 0)
  89                         {
  90                                 skip_mode ^= 1;
  91                         }
  92                         else if (strncmp(buff, "#endif", 6) == 0)
  93                         {
  94                                 ifdef_level--;
  95                                 if (ifdef_level == 0) skip_mode = 0;
  96                                 if (ifdef_level < 0)
  97                                 {
  98                                         printf("%i: warning: #endif without #ifdef, ignoring\n", line);
  99                                         ifdef_level = 0;
 100                                 }
 101                         }
 102
 103                         /* skip line */
 104                         continue;
 105                 }
 106                 if (!skip_mode)
 107                 {
 108                         do_counters(buff);
 109                         fputs(buff, fo);
 110                 }
 111         }
 112
 113         fclose(fi);
 114         fclose(fo);
 115
 116         return 0;
 117 }
 118