/*-------------------------------------------------------------------------
 * Copyright (C) 1997   National Center for Supercomputing Applications.
 *                      All rights reserved.
 *
 *-------------------------------------------------------------------------
 *
 * Created:             H5Ostab.c
 *                      Aug  6 1997
 *                      Robb Matzke <matzke@llnl.gov>
 *
 * Purpose:             Symbol table messages.
 *
 * Modifications:       
 *
 *-------------------------------------------------------------------------
 */
#include <H5private.h>
#include <H5Eprivate.h>
#include <H5Gprivate.h>
#include <H5MMprivate.h>
#include <H5Oprivate.h>

#define PABLO_MASK      H5O_stab_mask

/* PRIVATE PROTOTYPES */
static void *H5O_stab_decode(H5F_t *f, const uint8 *p, H5O_shared_t *sh);
static herr_t H5O_stab_encode(H5F_t *f, uint8 *p, const void *_mesg);
static void *H5O_stab_copy(const void *_mesg, void *_dest);
static size_t H5O_stab_size(H5F_t *f, const void *_mesg);
static herr_t H5O_stab_debug(H5F_t *f, const void *_mesg,
			     FILE * stream, intn indent, intn fwidth);

/* This message derives from H5O */
const H5O_class_t H5O_STAB[1] = {{
    H5O_STAB_ID,            	/*message id number             */
    "stab",                 	/*message name for debugging    */
    sizeof(H5O_stab_t),     	/*native message size           */
    H5O_stab_decode,        	/*decode message                */
    H5O_stab_encode,        	/*encode message                */
    H5O_stab_copy,          	/*copy the native value         */
    H5O_stab_size,          	/*size of symbol table entry    */
    NULL,                   	/*default reset method          */
    NULL,		    	/*get share method		*/
    NULL, 			/*set share method		*/
    H5O_stab_debug,         	/*debug the message             */
}};

/* Interface initialization */
static hbool_t interface_initialize_g = FALSE;
#define INTERFACE_INIT  NULL

/*-------------------------------------------------------------------------
 * Function:    H5O_stab_decode
 *
 * Purpose:     Decode a symbol table message and return a pointer to
 *              a new one created with malloc().
 *
 * Return:      Success:        Ptr to new message in native order.
 *
 *              Failure:        NULL
 *
 * Programmer:  Robb Matzke
 *              matzke@llnl.gov
 *              Aug  6 1997
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static void *
H5O_stab_decode(H5F_t *f, const uint8 *p, H5O_shared_t __unused__ *sh)
{
    H5O_stab_t             *stab;

    FUNC_ENTER(H5O_stab_decode, NULL);

    /* check args */
    assert(f);
    assert(p);
    assert (!sh);

    /* decode */
    if (NULL==(stab = H5MM_calloc(sizeof(H5O_stab_t)))) {
	HRETURN_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL,
		       "memory allocation failed");
    }
    H5F_addr_decode(f, &p, &(stab->btree_addr));
    H5F_addr_decode(f, &p, &(stab->heap_addr));

    FUNC_LEAVE(stab);
}

/*-------------------------------------------------------------------------
 * Function:    H5O_stab_encode
 *
 * Purpose:     Encodes a symbol table message.
 *
 * Return:      Non-negative on success/Negative on failure
 *
 * Programmer:  Robb Matzke
 *              matzke@llnl.gov
 *              Aug  6 1997
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5O_stab_encode(H5F_t *f, uint8 *p, const void *_mesg)
{
    const H5O_stab_t       *stab = (const H5O_stab_t *) _mesg;

    FUNC_ENTER(H5O_stab_encode, FAIL);

    /* check args */
    assert(f);
    assert(p);
    assert(stab);

    /* encode */
    H5F_addr_encode(f, &p, &(stab->btree_addr));
    H5F_addr_encode(f, &p, &(stab->heap_addr));

    FUNC_LEAVE(SUCCEED);
}

/*-------------------------------------------------------------------------
 * Function:    H5O_stab_fast
 *
 * Purpose:     Initializes a new message struct with info from the cache of
 *              a symbol table entry.
 *
 * Return:      Success:        Ptr to message struct, allocated if none
 *                              supplied.
 *
 *              Failure:        NULL
 *
 * Programmer:  Robb Matzke
 *              matzke@llnl.gov
 *              Aug  6 1997
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
void *
H5O_stab_fast(const H5G_cache_t *cache, const H5O_class_t *type, void *_mesg)
{
    H5O_stab_t             *stab = NULL;

    FUNC_ENTER(H5O_stab_fast, NULL);

    /* check args */
    assert(cache);
    assert(type);

    if (H5O_STAB == type) {
        if (_mesg) {
	    stab = (H5O_stab_t *) _mesg;
        } else if (NULL==(stab = H5MM_calloc(sizeof(H5O_stab_t)))) {
	    HRETURN_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL,
			   "memory allocation failed");
	}
        stab->btree_addr = cache->stab.btree_addr;
        stab->heap_addr = cache->stab.heap_addr;
    }
    FUNC_LEAVE(stab);
}

/*-------------------------------------------------------------------------
 * Function:    H5O_stab_copy
 *
 * Purpose:     Copies a message from _MESG to _DEST, allocating _DEST if
 *              necessary.
 *
 * Return:      Success:        Ptr to _DEST
 *
 *              Failure:        NULL
 *
 * Programmer:  Robb Matzke
 *              matzke@llnl.gov
 *              Aug  6 1997
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static void *
H5O_stab_copy(const void *_mesg, void *_dest)
{
    const H5O_stab_t       *stab = (const H5O_stab_t *) _mesg;
    H5O_stab_t             *dest = (H5O_stab_t *) _dest;

    FUNC_ENTER(H5O_stab_copy, NULL);

    /* check args */
    assert(stab);
    if (!dest && NULL==(dest = H5MM_calloc(sizeof(H5O_stab_t)))) {
	HRETURN_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL,
		       "memory allocation failed");
    }
    
    /* copy */
    *dest = *stab;

    FUNC_LEAVE((void *) dest);
}

/*-------------------------------------------------------------------------
 * Function:    H5O_stab_size
 *
 * Purpose:     Returns the size of the raw message in bytes not counting
 *              the message type or size fields, but only the data fields.
 *              This function doesn't take into account alignment.
 *
 * Return:      Success:        Message data size in bytes without alignment.
 *
 *              Failure:        zero
 *
 * Programmer:  Robb Matzke
 *              matzke@llnl.gov
 *              Aug  6 1997
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static size_t
H5O_stab_size(H5F_t *f, const void __unused__ *_mesg)
{
    FUNC_ENTER(H5O_stab_size, 0);
    FUNC_LEAVE(2 * H5F_SIZEOF_ADDR(f));
}

/*-------------------------------------------------------------------------
 * Function:    H5O_stab_debug
 *
 * Purpose:     Prints debugging info for a symbol table message.
 *
 * Return:      Non-negative on success/Negative on failure
 *
 * Programmer:  Robb Matzke
 *              matzke@llnl.gov
 *              Aug  6 1997
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5O_stab_debug(H5F_t __unused__ *f, const void *_mesg, FILE * stream,
	       intn indent, intn fwidth)
{
    const H5O_stab_t       *stab = (const H5O_stab_t *) _mesg;

    FUNC_ENTER(H5O_stab_debug, FAIL);

    /* check args */
    assert(f);
    assert(stab);
    assert(stream);
    assert(indent >= 0);
    assert(fwidth >= 0);

    fprintf(stream, "%*s%-*s ", indent, "", fwidth,
            "B-tree address:");
    H5F_addr_print(stream, &(stab->btree_addr));
    fprintf(stream, "\n");

    fprintf(stream, "%*s%-*s ", indent, "", fwidth,
            "Name heap address:");
    H5F_addr_print(stream, &(stab->heap_addr));
    fprintf(stream, "\n");

    FUNC_LEAVE(SUCCEED);
}
