sys/src/libndb/ipattr.c

   1 #include <u.h>
   2 #include <ctype.h>
   3
   4 /*
   5  *  return ndb attribute type of an ip name
   6  */
   7 char*
   8 ipattr(char *name)
   9 {
  10         char *p, c;
  11         int dot = 0;
  12         int alpha = 0;
  13         int colon = 0;
  14         int hex = 0;
  15
  16         for(p = name; *p; p++){
  17                 c = *p;
  18                 if(isdigit(c))
  19                         continue;
  20                 if(isxdigit(c))
  21                         hex = 1;
  22                 else if(isalpha(c) || c == '-')
  23                         alpha = 1;
  24                 else if(c == '.')
  25                         dot = 1;
  26                 else if(c == ':')
  27                         colon = 1;
  28                 else
  29                         return "sys";
  30         }
  31
  32         if(alpha){
  33                 if(dot)
  34                         return "dom";
  35                 else
  36                         return "sys";
  37         }
  38
  39         if(colon)
  40                 return "ip";    /* ip v6 */
  41
  42         if(dot && !hex)
  43                 return "ip";
  44         else
  45                 return "sys";
  46 }