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/****************************************************************************
* NCSA HDF *
* Software Development Group *
* National Center for Supercomputing Applications *
* University of Illinois at Urbana-Champaign *
* 605 E. Springfield, Champaign IL 61820 *
* *
* For conditions of distribution and use, see the accompanying *
* hdf/COPYING file. *
* *
****************************************************************************/
#ifdef RCSID
static char RcsId[] = "@(#)$Revision$";
#endif
/* $Id$ */
/*LINTLIBRARY */
/*+
FILE
H5Osdtyp.c
HDF5 Simple Datatype Object Header Message routines
EXPORTED ROUTINES
LIBRARY-SCOPED ROUTINES
LOCAL ROUTINES
+ */
#include <H5private.h>
#include <H5Eprivate.h>
#include <H5Gprivate.h>
#include <H5MMprivate.h>
#include <H5Oprivate.h>
#define PABLO_MASK H5O_sim_dtype_mask
/* PRIVATE PROTOTYPES */
static void *H5O_sim_dtype_decode (hdf5_file_t *f, size_t raw_size, const uint8 *p);
static herr_t H5O_sim_dtype_encode (hdf5_file_t *f, size_t size, uint8 *p,
const void *_mesg);
static void *H5O_sim_dtype_fast (const H5G_entry_t *ent, void *_mesg);
static hbool_t H5O_sim_dtype_cache (H5G_entry_t *ent, const void *_mesg);
static void *H5O_sim_dtype_copy (const void *_mesg, void *_dest);
static size_t H5O_sim_dtype_size (hdf5_file_t *f, const void *_mesg);
static herr_t H5O_sim_dtype_debug (hdf5_file_t *f, const void *_mesg,
FILE *stream, intn indent, intn fwidth);
/* This message derives from H5O */
const H5O_class_t H5O_SIM_DTYPE[1] = {{
H5O_SIM_DTYPE_ID, /* message id number */
"sim_dtype", /* message name for debugging */
sizeof (H5O_sim_dtype_t), /* native message size */
H5O_sim_dtype_decode, /* decode message */
H5O_sim_dtype_encode, /* encode message */
H5O_sim_dtype_fast, /* get message from stab entry */
H5O_sim_dtype_cache, /* put message into stab entry */
H5O_sim_dtype_copy, /* copy the native value */
H5O_sim_dtype_size, /* size of symbol table entry */
NULL, /* default reset method */
H5O_sim_dtype_debug, /* debug the message */
}};
/* Is the interface initialized? */
static hbool_t interface_initialize_g = FALSE;
/*--------------------------------------------------------------------------
NAME
H5O_sim_dtype_decode
PURPOSE
Decode a simple datatype message and return a pointer to a memory struct
with the decoded information
USAGE
void *H5O_sim_dtype_decode(f, raw_size, p)
hdf5_file_t *f; IN: pointer to the HDF5 file struct
size_t raw_size; IN: size of the raw information buffer
const uint8 *p; IN: the raw information buffer
RETURNS
Pointer to the new message in native order on success, NULL on failure
DESCRIPTION
This function decodes the "raw" disk form of a simple datatype message
into a struct in memory native format. The struct is allocated within this
function using malloc() and is returned to the caller.
--------------------------------------------------------------------------*/
static void *
H5O_sim_dtype_decode (hdf5_file_t *f, size_t raw_size, const uint8 *p)
{
H5O_sim_dtype_t *sdtype;
FUNC_ENTER (H5O_sim_dtype_decode, NULL, NULL);
/* check args */
assert (f);
assert (raw_size == 4);
assert (p);
/* decode */
if((sdtype = H5MM_xcalloc (1, sizeof(H5O_sim_dtype_t)))!=NULL)
{
sdtype->len=*p++;
sdtype->arch=*p++;
UINT16DECODE(p,sdtype->base);
} /* end if */
FUNC_LEAVE (sdtype);
} /* end H5O_sim_dtype_decode() */
/*--------------------------------------------------------------------------
NAME
H5O_sim_dtype_encode
PURPOSE
Encode a simple datatype message
USAGE
herr_t H5O_sim_dtype_encode(f, raw_size, p, mesg)
hdf5_file_t *f; IN: pointer to the HDF5 file struct
size_t raw_size; IN: size of the raw information buffer
const uint8 *p; IN: the raw information buffer
const void *mesg; IN: Pointer to the simple datatype struct
RETURNS
SUCCEED/FAIL
DESCRIPTION
This function encodes the native memory form of the simple datatype
message in the "raw" disk form.
--------------------------------------------------------------------------*/
static herr_t
H5O_sim_dtype_encode (hdf5_file_t *f, size_t raw_size, uint8 *p, const void *mesg)
{
const H5O_sim_dtype_t *sdtype = (const H5O_sim_dtype_t *)mesg;
FUNC_ENTER (H5O_sim_dtype_encode, NULL, FAIL);
/* check args */
assert (f);
assert (raw_size == 4);
assert (p);
assert (sdtype);
/* encode */
*p++=sdtype->len;
*p++=sdtype->arch;
UINT16ENCODE(p,sdtype->base);
FUNC_LEAVE (SUCCEED);
} /* end H5O_sim_dtype_encode() */
/*--------------------------------------------------------------------------
NAME
H5O_sim_dtype_fast
PURPOSE
Initializes a new simple datatype struct with info from a symbol table
entry.
USAGE
void *H5O_sim_dtype_fast(ent, mesg)
const H5G_entry_t *ent; IN: pointer to the symbol table entry
const void *mesg; IN: Pointer to the simple datatype struct
RETURNS
Pointer to the message structure (allocated if none is supplied) on success,
NULL on failure
DESCRIPTION
This function fills the native memory form of the simple datatype
message from a symbol-table entry cache fields. (This method is required
for simple datatypes, as they can be cached in the symbol-table entry)
--------------------------------------------------------------------------*/
static void *
H5O_sim_dtype_fast (const H5G_entry_t *ent, void *mesg)
{
H5O_sim_dtype_t *sdtype = (H5O_sim_dtype_t *)mesg;
const uint8 *p;
FUNC_ENTER (H5O_sim_dtype_fast, NULL, NULL);
/* check args */
assert (ent);
if (H5G_CACHED_SDATA==ent->type)
{
if (!sdtype)
if((sdtype = H5MM_xcalloc (1, sizeof(H5O_sim_dtype_t)))!=NULL)
{
p=(const uint8 *)&ent->cache.sdata.nt;
sdtype->len=*p++;
sdtype->arch=*p++;
UINT16DECODE(p,sdtype->base);
} /* end if */
} /* end if */
else
sdtype = NULL;
FUNC_LEAVE (sdtype);
} /* end H5O_sim_dtype_fast() */
/*--------------------------------------------------------------------------
NAME
H5O_sim_dtype_cache
PURPOSE
Copies a simple datatype message into the cache portion of a symbol table
entry.
USAGE
hbool_t H5O_sim_dtype_cache(ent, mesg)
const H5G_entry_t *ent; IN: Pointer to the symbol table entry
const void *mesg; IN: Pointer to the simple datatype struct
RETURNS
BTRUE if symbol-table modified, BFALSE if not modified, BFAIL on failure.
DESCRIPTION
This function is the opposite of the H5O_sim_dtype_fast method, it
copies a message into the cached portion of a symbol-table entry. (This
method is required for simple datatypes, as they can be cached in the
symbol-table entry)
--------------------------------------------------------------------------*/
static hbool_t
H5O_sim_dtype_cache (H5G_entry_t *ent, const void *mesg)
{
const H5O_sim_dtype_t *sdtype = (const H5O_sim_dtype_t *)mesg;
uint8 *p;
hbool_t modified = BFALSE;
FUNC_ENTER (H5O_sim_dtype_cache, NULL, BFAIL);
/* check args */
assert (ent);
assert (sdtype);
/*
* We do this in two steps so Purify doesn't complain about
* uninitialized memory reads even though they don't bother
* anything.
*/
p=(uint8 *)&(ent->cache.sdata);
if (H5G_CACHED_SDATA != ent->type)
{
modified = BTRUE;
ent->type = H5G_CACHED_SDATA;
*p++=sdtype->len;
*p++=sdtype->arch;
UINT16ENCODE(p,sdtype->base);
} /* end if */
else
{
if(ent->cache.sdata.nt.length != sdtype->len)
{
modified = BTRUE;
ent->cache.sdata.nt.length = sdtype->len;
} /* end if */
if (ent->cache.sdata.nt.arch != sdtype->arch)
{
modified = BTRUE;
ent->cache.sdata.nt.arch = sdtype->arch;
} /* end if */
if (ent->cache.sdata.nt.type != (uint16)sdtype->base)
{
modified = BTRUE;
ent->cache.sdata.nt.type = (uint16)sdtype->base;
} /* end if */
} /* end else */
FUNC_LEAVE (modified);
} /* end H5O_sim_dtype_cache() */
/*--------------------------------------------------------------------------
NAME
H5O_sim_dtype_copy
PURPOSE
Copies a message from MESG to DEST, allocating DEST if necessary.
USAGE
void *H5O_sim_dtype_copy(mesg, dest)
const void *mesg; IN: Pointer to the source simple datatype struct
const void *dest; IN: Pointer to the destination simple datatype struct
RETURNS
Pointer to DEST on success, NULL on failure
DESCRIPTION
This function copies a native (memory) simple datatype message,
allocating the destination structure if necessary.
--------------------------------------------------------------------------*/
static void *
H5O_sim_dtype_copy (const void *mesg, void *dest)
{
const H5O_sim_dtype_t *src = (const H5O_sim_dtype_t *)mesg;
H5O_sim_dtype_t *dst = (H5O_sim_dtype_t *)dest;
FUNC_ENTER (H5O_sim_dtype_copy, NULL, NULL);
/* check args */
assert (src);
if (!dst) dst = H5MM_xcalloc (1, sizeof(H5O_sim_dtype_t));
/* copy */
HDmemcpy(dst,src,sizeof(H5O_sim_dtype_t));
FUNC_LEAVE ((void*)dst);
} /* end H5O_sim_dtype_copy() */
/*--------------------------------------------------------------------------
NAME
H5O_sim_dtype_size
PURPOSE
Return the raw message size in bytes
USAGE
void *H5O_sim_dtype_copy(f, mesg)
hdf5_file_t *f; IN: pointer to the HDF5 file struct
const void *mesg; IN: Pointer to the source simple datatype struct
RETURNS
Size of message on success, FAIL on failure
DESCRIPTION
This function returns the size of the raw simple datatype message on
success. (Not counting the message type or size fields, only the data
portion of the message). It doesn't take into account alignment.
--------------------------------------------------------------------------*/
static size_t
H5O_sim_dtype_size (hdf5_file_t *f, const void *mesg)
{
FUNC_ENTER (H5O_sim_dtype_size, NULL, FAIL);
FUNC_LEAVE (4);
} /* end H5O_sim_dtype_size() */
/*--------------------------------------------------------------------------
NAME
H5O_sim_dtype_debug
PURPOSE
Prints debugging information for a simple datatype message
USAGE
void *H5O_sim_dtype_debug(f, mesg, stream, indent, fwidth)
hdf5_file_t *f; IN: pointer to the HDF5 file struct
const void *mesg; IN: Pointer to the source simple datatype struct
FILE *stream; IN: Pointer to the stream for output data
intn indent; IN: Amount to indent information by
intn fwidth; IN: Field width (?)
RETURNS
SUCCEED/FAIL
DESCRIPTION
This function prints debugging output to the stream passed as a
parameter.
--------------------------------------------------------------------------*/
static herr_t
H5O_sim_dtype_debug (hdf5_file_t *f, const void *mesg, FILE *stream,
intn indent, intn fwidth)
{
const H5O_sim_dtype_t *sdtype = (const H5O_sim_dtype_t *)mesg;
FUNC_ENTER (H5O_sim_dtype_debug, NULL, FAIL);
/* check args */
assert (f);
assert (sdtype);
assert (stream);
assert (indent>=0);
assert (fwidth>=0);
fprintf (stream, "%*s%-*s %lu\n", indent, "", fwidth,
"Length:",
(unsigned long)(sdtype->len));
fprintf (stream, "%*s%-*s %lu\n", indent, "", fwidth,
"Architecture:",
(unsigned long)(sdtype->arch));
fprintf (stream, "%*s%-*s %lu\n", indent, "", fwidth,
"Data-Type:",
(unsigned long)((uint16)sdtype->base));
FUNC_LEAVE (SUCCEED);
} /* end H5O_sim_dtype_debug() */
|
