[svn-r41] Interim checkpoint of dataset code for Robb to look at.

1 files changed, 364 insertions, 0 deletions

diff --git a/src/H5Osdtyp.c b/src/H5Osdtyp.c
new file mode 100644
index 0000000..3c881a1
--- /dev/null
+++ b/src/H5Osdtyp.c
@@ -0,0 +1,364 @@
+/****************************************************************************
+* 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->length=*p++;
+        sdtype->arch=*p++;
+        UINT16DECODE(p,sdtype->type);
+      } /* 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->length;
+    *p++=sdtype->arch;
+    UINT16ENCODE(p,sdtype->type);
+
+    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=&(uint8 *)ent->cache.sdata.nt;
+              sdtype->length=*p++;
+              sdtype->arch=*p++;
+              UINT16DECODE(p,sdtype->type);
+            } /* 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;
+    const 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->length;
+        *p++=sdtype->arch;
+        UINT16ENCODE(p,sdtype->type);
+      } /* end if */
+    else
+      {
+        if(ent->cache.sdata.length= sdtype->length)
+          {
+            modified = BTRUE;
+            ent->cache.sdata.length = sdtype->length;
+          } /* end if */
+
+        if (ent->cache.sdata.arch != sdtype->arch)
+          {
+           modified = BTRUE;
+           ent->cache.sdata.arch = sdtype->arch;
+          } /* end if */
+
+        if (ent->cache.sdata.type != sdtype->type)
+          {
+           modified = BTRUE;
+           ent->cache.sdata.type = sdtype->type;
+          } /* 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 */
+   HDmempcy(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->length));
+   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)(sdtype->type));
+
+   FUNC_LEAVE (SUCCEED);
+} /* end H5O_sim_dtype_debug() */
+