include/minix/queryparam.h

   1 /*      queryparam.h - query program parameters         Author: Kees J. Bot
   2  *                                                              22 Apr 1994
   3  */
   4 #ifndef _MINIX__QUERYPARAM_H
   5 #define _MINIX__QUERYPARAM_H
   6
   7
   8 typedef size_t _mnx_size_t;
   9
  10 struct export_param_list {
  11         char    *name;          /* "variable", "[", ".field", or NULL. */
  12         void    *offset;        /* Address of a variable or field offset. */
  13         size_t  size;           /* Size of the resulting object. */
  14 };
  15
  16 struct export_params {
  17         struct export_param_list *list; /* List of exported parameters. */
  18         struct export_params     *next; /* Link several sets of parameters. */
  19 };
  20
  21 #ifdef __STDC__
  22 #define qp_stringize(var)       #var
  23 #define qp_dotstringize(var)    "." #var
  24 #else
  25 #define qp_stringize(var)       "var"
  26 #define qp_dotstringize(var)    ".var"
  27 #endif
  28 #define QP_VARIABLE(var)        { qp_stringize(var), &(var), sizeof(var) }
  29 #define QP_ARRAY(var)           { "[", 0, sizeof((var)[0]) }
  30 #define QP_VECTOR(var,ptr,len)  { qp_stringize(var), &(ptr), -1 },\
  31                                 { "[", &(len), sizeof(*(ptr)) }
  32 #define QP_FIELD(field, type)   { qp_dotstringize(field), \
  33                                         (void *)offsetof(type, field), \
  34                                         sizeof(((type *)0)->field) }
  35 #define QP_END()                { 0, 0, 0 }
  36
  37 void qp_export(struct export_params *_ex_params);
  38 int queryparam(int (*_qgetc) (void), void **_paddress, _mnx_size_t
  39         *_psize);
  40 _mnx_size_t paramvalue(char **_value, void *_address, _mnx_size_t
  41         _size);
  42 #endif /* _MINIX__QUERYPARAM_H */
  43
  44 /* $PchId: queryparam.h,v 1.1 2005/06/28 14:31:26 philip Exp $ */