m_struct.h

   1 #ifndef _M_STRUCT_H
   2 #define _M_STRUCT_H
   3
   4 ///////////////////// A struct setter ////////////////////////
   5
   6 struct m_option;
   7
   8 /// Struct definition
   9 typedef struct m_struct_st {
  10   char* name; // For error msg and debuging
  11   unsigned int size; // size of the whole struct
  12   void* defaults; // Pointer to a struct filled with the default settings
  13   struct m_option* fields; // settable fields
  14 } m_struct_t;
  15
  16 // Note : the p field of the m_option_t struct must contain the offset
  17 // of the member in the struct (use M_ST_OFF macro for this).
  18
  19 // From glib.h (modified ;-)
  20 #define M_ST_OFF(struct_type, member)    \
  21     ((void*) &((struct_type*) 0)->member)
  22 #define M_ST_MB_P(struct_p, struct_offset)   \
  23     ((void*) (struct_p) + (unsigned long) (struct_offset))
  24 #define M_ST_MB(member_type, struct_p, struct_offset)   \
  25     (*(member_type*) M_ST_MB_P ((struct_p), (struct_offset)))
  26
  27
  28
  29 /// Allocate the struct and set it to the defaults
  30 void*
  31 m_struct_alloc(m_struct_t* st);
  32 /// Set a field of the struct
  33 int
  34 m_struct_set(m_struct_t* st, void* obj, char* field, char* param);
  35 /// Reset a field (or all if field == NULL) to defaults
  36 void
  37 m_struct_reset(m_struct_t* st, void* obj, char* field);
  38 /// Create a copy of an existing struct
  39 void*
  40 m_struct_copy(m_struct_t* st, void* obj);
  41 /// Free an allocated struct
  42 void
  43 m_struct_free(m_struct_t* st, void* obj);
  44 /// Get a field description
  45 struct m_option*
  46 m_struct_get_field(m_struct_t* st,char* f);
  47
  48 #endif /* _M_STRUCT_H */