drivers/block/paride/setup.h

   1 /*
   2         setup.h    (c) 1997-8   Grant R. Guenther <grant@torque.net>
   3                                 Under the terms of the GNU General Public License.
   4
   5         This is a table driven setup function for kernel modules
   6         using the module.variable=val,... command line notation.
   7
   8 */
   9
  10 /* Changes:
  11
  12         1.01    GRG 1998.05.05  Allow negative and defaulted values
  13
  14 */
  15
  16 #include <linux/ctype.h>
  17 #include <linux/string.h>
  18
  19 struct setup_tab_t {
  20
  21         char    *tag;   /* variable name */
  22         int     size;   /* number of elements in array */
  23         int     *iv;    /* pointer to variable */
  24 };
  25
  26 typedef struct setup_tab_t STT;
  27
  28 /*  t     is a table that describes the variables that can be set
  29           by gen_setup
  30     n     is the number of entries in the table
  31     ss    is a string of the form:
  32
  33                 <tag>=[<val>,...]<val>
  34 */
  35
  36 static void generic_setup( STT t[], int n, char *ss )
  37
  38 {       int     j,k, sgn;
  39
  40         k = 0;
  41         for (j=0;j<n;j++) {
  42                 k = strlen(t[j].tag);
  43                 if (strncmp(ss,t[j].tag,k) == 0) break;
  44         }
  45         if (j == n) return;
  46
  47         if (ss[k] == 0) {
  48                 t[j].iv[0] = 1;
  49                 return;
  50         }
  51
  52         if (ss[k] != '=') return;
  53         ss += (k+1);
  54
  55         k = 0;
  56         while (ss && (k < t[j].size)) {
  57                 if (!*ss) break;
  58                 sgn = 1;
  59                 if (*ss == '-') { ss++; sgn = -1; }
  60                 if (!*ss) break;
  61                 if (isdigit(*ss))
  62                   t[j].iv[k] = sgn * simple_strtoul(ss,NULL,0);
  63                 k++;
  64                 if ((ss = strchr(ss,',')) != NULL) ss++;
  65         }
  66 }
  67
  68 /* end of setup.h */
  69