tools/genobjnametable.cpp

   1
   2 #include <stdio.h>
   3 #include <stdint.h>
   4 #include <string.h>
   5 #include <stdlib.h>
   6 #include <sys/stat.h>
   7 #include <errno.h>
   8
   9 char *nametable[1000];
  10 const char *infile = "object.h";
  11 const char *outfile = "autogen/objnames.cpp";
  12
  13 // read data from a file until CR
  14 void fgetline(FILE *fp, char *str, int maxlen)
  15 {
  16 int k;
  17         str[0] = 0;
  18         fgets(str, maxlen - 1, fp);
  19
  20         // trim the CRLF that fgets appends
  21         for(k=strlen(str)-1;k>=0;k--)
  22         {
  23                 if (str[k] != 13 && str[k] != 10) break;
  24                 str[k] = 0;
  25         }
  26 }
  27
  28
  29 bool strbegin(const char *bigstr, const char *smallstr)
  30 {
  31 int i;
  32
  33         for(i=0;smallstr[i];i++)
  34                 if (bigstr[i] != smallstr[i]) return false;
  35
  36         return true;
  37 }
  38
  39
  40 bool gen_table(void)
  41 {
  42 FILE *fp, *fpo;
  43 char line[1024];
  44 int nobjects = -1;
  45 int count = 0;
  46
  47         printf("regenerating object-names table...\n");
  48
  49         fp = fopen(infile, "rb");
  50         if (!fp)
  51         {
  52                 fprintf(stderr, "<Cannot open object.h>\n");
  53                 return 1;
  54         }
  55
  56         fpo = fileopen(outfile, "wb");
  57         if (!fpo)
  58         {
  59                 fprintf(stderr, "<Cannot open objnames.cpp>\n");
  60                 fclose(fp);
  61                 return 1;
  62         }
  63
  64         memset(nametable, 0, sizeof(nametable));
  65
  66         while(!feof(fp))
  67         {
  68                 fgetline(fp, line, sizeof(line));
  69
  70                 if (strbegin(line, "#define OBJ_"))
  71                 {
  72                         char *ptr = strstr(line, "//");
  73                         if (ptr) *ptr = 0;
  74
  75                         strtok(line, " \t");
  76                         const char *obj_name = strtok(NULL, " \t");
  77                         const char *obj_number_str = strtok(NULL, " \t");
  78                         int obj_number;
  79
  80                         if (obj_name && obj_number_str && (obj_number = atoi(obj_number_str)))
  81                         {
  82                                 if (!strcmp(obj_name, "OBJ_LAST"))
  83                                 {
  84                                         nobjects = obj_number;
  85                                 }
  86                                 else
  87                                 {
  88                                         //printf("obj_name: %s   obj_number: %d\n", obj_name, obj_number);
  89                                         nametable[obj_number] = strdup(&obj_name[4]);
  90                                         count++;
  91                                 }
  92                         }
  93                 }
  94         }
  95
  96         if (nobjects == -1)
  97         {
  98                 fprintf(stderr, "Couldn't find OBJ_LAST\n");
  99                 fclose(fp);
 100                 fclose(fpo);
 101                 return 1;
 102         }
 103
 104         fprintf(fpo, "\n// auto-generated by genobjnametable.cpp\n");
 105         fprintf(fpo, "#include <stdio.h>\n");
 106         fprintf(fpo, "\nconst char *object_names[] = {\n");
 107
 108         for(int i=0;i<nobjects;i++)
 109         {
 110                 if (nametable[i])
 111                 {
 112                         fprintf(fpo, "\t\"%s\"", nametable[i]);
 113                         free(nametable[i]);
 114                 }
 115                 else
 116                 {
 117                         fprintf(fpo, "\tNULL");
 118                 }
 119
 120                 if (i+1 != nobjects)
 121                         fprintf(fpo, ",\n");
 122                 else
 123                         fprintf(fpo, "\n");
 124         }
 125
 126         fprintf(fpo, "};\n");
 127         printf("wrote %d objects in a space of %d\n", count, nobjects);
 128
 129         fclose(fp);
 130         fclose(fpo);
 131         return 0;
 132 }
 133
 134
 135 int main(void)
 136 {
 137 struct stat instat;
 138 struct stat outstat;
 139
 140         if (stat(outfile, &outstat))
 141         {
 142                 printf("names table missing\n");
 143                 return gen_table();
 144         }
 145
 146         if (stat(infile, &instat))
 147         {
 148                 fprintf(stderr, "cannot stat '%s': error %d\n", infile, errno);
 149                 return 1;
 150         }
 151
 152         if (instat.st_mtime >= outstat.st_mtime)
 153         {
 154                 return gen_table();
 155         }
 156
 157         printf("table up to date\n");
 158         return 0;
 159 }
 160
 161
 162
 163