#ifndef SLP_ATTR_H_INCLUDED
#define SLP_ATTR_H_INCLUDED

#include "../common/slp_compare.h"
#include "../libslp/slp.h"
#include <stdio.h>

#define SLP_TAG_BAD 300
#define SLP_TAG_ERROR 400

/* The type for SLP attributes. An opaque type that acts as a handle to an 
 * attribute bundle.
 */
typedef void *SLPAttributes;
typedef void *SLPAttrIterator;
typedef void *SLPTemplate; 


/* The callback for receiving attributes from a SLPFindAttrObj(). */
typedef SLPBoolean SLPAttrObjCallback(
                                     SLPHandle hslp, 
                                     const SLPAttributes attr, 
                                     SLPError errcode, 
                                     void* cookie 
                                     );

/* A datatype to encapsulate opaque data.*/
typedef struct
{
    int len;
    char *data;
} SLPOpaque;


/*****************************************************************************
 *
 * Datatype to represent the types of known attributes. 
 * 
 ****************************************************************************/
typedef int SLPType;
#define SLP_BOOLEAN ((SLPType)1)
#define SLP_INTEGER ((SLPType)2)
#define SLP_KEYWORD ((SLPType)4)
#define SLP_STRING ((SLPType)8)
#define SLP_OPAQUE ((SLPType)16)




/*****************************************************************************
 *
 * Datatype to represent modes of attribute modification.
 * 
 ****************************************************************************/
typedef enum
{
    SLP_ADD = 1, /* Appends to the attribute list.*/
    SLP_REPLACE = 2 /* Replaces attribute. */
} SLPInsertionPolicy;


/*****************************************************************************
 *
 * Functions for the attribute struct. One could almost call them methods. 
 * 
 ****************************************************************************/

SLPError SLPAttrAlloc(
                     const char *lang, 
                     const FILE *template_h,
                     const SLPBoolean strict, 
                     SLPAttributes *slp_attr
                     );

SLPError SLPAttrAllocStr(
                        const char *lang, 
                        const FILE *template_h,
                        const SLPBoolean strict, 
                        SLPAttributes *slp_attr,
                        const char *str
                        );

void SLPAttrFree(SLPAttributes attr_h);

/* Attribute manipulation. */
SLPError SLPAttrSet_bool(
                        SLPAttributes attr_h,
                        const char *attribute_tag,
                        SLPBoolean val
                        );

SLPError SLPAttrSet_str(
                       SLPAttributes attr_h,
                       const char *tag,
                       const char *val,
                       SLPInsertionPolicy 
                       );

SLPError SLPAttrSet_keyw(
                        SLPAttributes attr_h,
                        const char *attribute_tag
                        );

SLPError SLPAttrSet_int(
                       SLPAttributes attr_h,
                       const char *tag,
                       int val,
                       SLPInsertionPolicy policy
                       ); 

SLPError SLPAttrSet_opaque(
                          SLPAttributes attr_h,
                          const char *tag,
                          const char *val,
                          const unsigned int len, 
                          SLPInsertionPolicy policy
                          );

SLPError SLPAttrSet_guess(
                         SLPAttributes attr_h,
                         const char *tag,
                         const char *val,
                         SLPInsertionPolicy policy
                         );


/* Attribute Querying. */
SLPError SLPAttrGet_bool(
                        SLPAttributes attr_h,
                        const char *tag,
                        SLPBoolean *val
                        );

SLPError SLPAttrGet_keyw(
                        SLPAttributes attr_h,
                        const char *tag
                        );

SLPError SLPAttrGet_int(
                       SLPAttributes attr_h,
                       const char *tag,
                       int *val[],
                       int *size
                       );

SLPError SLPAttrGet_str(
                       SLPAttributes attr_h,
                       const char *tag,
                       char ***val,
                       int *size
                       ); 


SLPError SLPAttrGet_opaque(
                          SLPAttributes attr_h,
                          const char *tag,
                          SLPOpaque ***val,
                          int *size
                          );


/* Misc. */
SLPError SLPAttrGetType(SLPAttributes attr_h, const char *tag, SLPType *type);

SLPError SLPAttrSerialize(SLPAttributes attr_h,
                          const char* tags        /* NULL terminated */,
                          char **buffer,
                          int bufferlen,          /* Size of buffer. */
                          int* count,             /* Bytes needed/written. */
                          SLPBoolean find_delta
                         );

SLPError SLPAttrFreshen(SLPAttributes attr_h, const char *new_attrs);

/* Functions. */
SLPError SLPRegAttr(
                   SLPHandle slp_h, 
                   const char* srvurl, 
                   unsigned short lifetime, 
                   const char* srvtype, 
                   SLPAttributes attr_h, 
                   SLPBoolean fresh, 
                   SLPRegReport callback, 
                   void* cookie 
                   );

SLPError SLPFindAttrObj (
                        SLPHandle hslp, 
                        const char* srvurlorsrvtype, 
                        const char* scopelist, 
                        const char* attrids, 
                        SLPAttrObjCallback *callback, 
                        void* cookie
                        );



/*****************************************************************************
 *
 * Functions for the iterator struct
 * 
 ****************************************************************************/

SLPError SLPAttrIteratorAlloc(SLPAttributes attr, SLPAttrIterator *iter);
void SLPAttrIteratorFree(SLPAttrIterator iter);

SLPBoolean SLPAttrIterNext(SLPAttrIterator iter_h, char const **tag, SLPType *type);


#endif