contrib/ipfilter/lib/parsefields.c

   1 #include "ipf.h"
   2 #include <err.h>
   3
   4 extern int nohdrfields;
   5
   6 wordtab_t *parsefields(table, arg)
   7         wordtab_t *table;
   8         char *arg;
   9 {
  10         wordtab_t *f, *fields;
  11         char *s, *t;
  12         int num;
  13
  14         fields = NULL;
  15         num = 0;
  16
  17         for (s = strtok(arg, ","); s != NULL; s = strtok(NULL, ",")) {
  18                 t = strchr(s, '=');
  19                 if (t != NULL) {
  20                         *t++ = '\0';
  21                         if (*t == '\0')
  22                                 nohdrfields = 1;
  23                 }
  24
  25                 f = findword(table, s);
  26                 if (f == NULL) {
  27                         fprintf(stderr, "Unknown field '%s'\n", s);
  28                         exit(1);
  29                 }
  30
  31                 num++;
  32                 if (fields == NULL) {
  33                         fields = malloc(2 * sizeof(*fields));
  34                 } else {
  35                         fields = realloc(fields, (num + 1) * sizeof(*fields));
  36                         if (fields == NULL) {
  37                                 warnx("memory allocation error at %d in %s in %s", __LINE__, __FUNCTION__, __FILE__);
  38                                 abort();
  39                         }
  40                 }
  41
  42                 if (t == NULL) {
  43                         fields[num - 1].w_word = f->w_word;
  44                 } else {
  45                         fields[num - 1].w_word = t;
  46                 }
  47                 fields[num - 1].w_value = f->w_value;
  48                 fields[num].w_word = NULL;
  49                 fields[num].w_value = 0;
  50         }
  51
  52         return fields;
  53 }