[svn-r9250] Purpose:

    Bug fix

Description:
    Correct typedef for dataset region references to avoid struct alignment
issues on Crays.

Solution:
    Change the typedef for hdset_reg_ref_t from a struct to an array of
unsigned char's of the correct size and propagate the appropriate adjustments
around the code.

Platforms tested:
    FreeBSD 4.10 (sleipnir)
    Linux 2.4 (verbena) w/fortran
    Cray T90 (subzero) w/fortran
    Cray SV1 (wind) w/fortran & parallel
    Cray T3E (cyclone) w/fortran & parallel

6 files changed, 20 insertions, 20 deletions

diff --git a/fortran/src/H5Df.c b/fortran/src/H5Df.c
index 83b69e7..b7c5263 100644
--- a/fortran/src/H5Df.c
+++ b/fortran/src/H5Df.c
@@ -290,7 +290,7 @@ nh5dwrite_ref_reg_c (hid_t_f *dset_id, hid_t_f *mem_type_id, hid_t_f *mem_space_
       buf_c = (hdset_reg_ref_t *)HDmalloc(sizeof(hdset_reg_ref_t)*(n));
       if ( buf_c != NULL ) {
       for (i = 0; i < n; i++) {
-           HDmemcpy(buf_c[i].heapid, buf, H5R_DSET_REG_REF_BUF_SIZE);
+           HDmemcpy(&buf_c[i], buf, H5R_DSET_REG_REF_BUF_SIZE);
            buf = buf + REF_REG_BUF_LEN_F;
       }
       }  
@@ -496,7 +496,7 @@ nh5dread_ref_reg_c (hid_t_f *dset_id, hid_t_f *mem_type_id, hid_t_f *mem_space_i
          ret = H5Dread(c_dset_id, c_mem_type_id, c_mem_space_id, c_file_space_id, c_xfer_prp, buf_c);
          if (ret >=0) {
             for (i = 0; i < n; i++) {
-               HDmemcpy(buf, buf_c[i].heapid, H5R_DSET_REG_REF_BUF_SIZE);
+               HDmemcpy(buf, &buf_c[i], H5R_DSET_REG_REF_BUF_SIZE);
                buf = buf + REF_REG_BUF_LEN_F;
             }  
          }
diff --git a/fortran/src/H5Rf.c b/fortran/src/H5Rf.c
index 06cb6e3..070efdd 100644
--- a/fortran/src/H5Rf.c
+++ b/fortran/src/H5Rf.c
@@ -102,7 +102,7 @@ nh5rcreate_region_c (int_f *ref, hid_t_f *loc_id, _fcd name, int_f *namelen, hid
 
      HDfree(c_name);
      if (ret_value_c >= 0) {
-         HDmemcpy (ref, ref_c.heapid, H5R_DSET_REG_REF_BUF_SIZE);
+         HDmemcpy (ref, &ref_c, H5R_DSET_REG_REF_BUF_SIZE);
          ret_value = 0;
      }
      return ret_value;
@@ -127,7 +127,7 @@ nh5rdereference_region_c (hid_t_f *dset_id, int_f *ref, hid_t_f *obj_id)
      hdset_reg_ref_t ref_c;
      hid_t c_obj_id;
 
-     HDmemcpy (ref_c.heapid, ref, H5R_DSET_REG_REF_BUF_SIZE);
+     HDmemcpy (&ref_c, ref, H5R_DSET_REG_REF_BUF_SIZE);
 
      /*
       * Call H5Rdereference function.
@@ -192,7 +192,7 @@ nh5rget_region_region_c (hid_t_f *dset_id, int_f *ref, hid_t_f *space_id)
      hid_t c_space_id;
      hdset_reg_ref_t ref_c;
 
-     HDmemcpy (ref_c.heapid, ref, H5R_DSET_REG_REF_BUF_SIZE);
+     HDmemcpy (&ref_c, ref, H5R_DSET_REG_REF_BUF_SIZE);
 
      /*
       * Call H5Rget_region function.
diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index 5bce3e5..6dc7761 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -180,10 +180,12 @@ Bug Fixes since HDF5-1.6.0 release
 
     Library
     -------
+        - Corrected error where dataset region references were written in an
+            incorrect way on Cray machines.  PVN & QAK - 2004/09/13
         - The H5Tget_native_type now determines the native type for integers 
-	  based on the precision. This is to avoid cases of wrongly converting 
-          an int to a short in machines that have a short of 8 bytes but with 
-	  32bit precision (e.g Cray SV1). PVN - 2004/09/07  
+	    based on the precision. This is to avoid cases of wrongly converting 
+            an int to a short in machines that have a short of 8 bytes but with 
+	    32bit precision (e.g Cray SV1). PVN - 2004/09/07  
         - Changed H5Dread() to not overwrite data in an application's buffer
             with garbage when accessing a chunked dataset with an undefined
             fill value and an unwritten chunk is uncountered.  QAK - 2004/08/25
diff --git a/src/H5.c b/src/H5.c
index 2e01b58..44f46e1 100644
--- a/src/H5.c
+++ b/src/H5.c
@@ -2464,7 +2464,7 @@ H5_trace (const double *returning, const char *func, const char *type, ...)
                 }
 	    } else {
                 hobj_ref_t ref = va_arg (ap, hobj_ref_t);
-                fprintf (out, "Reference Object=%p", (void *)&ref);
+		HDfprintf(out, "Reference Object=%a", ref);
 	    }
 	    break;
 
diff --git a/src/H5R.c b/src/H5R.c
index cd28345..3bbb5e5 100644
--- a/src/H5R.c
+++ b/src/H5R.c
@@ -175,8 +175,8 @@ H5R_create(void *_ref, H5G_entry_t *loc, const char *name, H5R_type_t ref_type,
             /* Return any previous heap block to the free list if we are garbage collecting */
             if(loc->file->shared->gc_ref) {
                 /* Check for an existing heap ID in the reference */
-                for(u=0, heapid_found=0; u<H5R_DSET_REG_REF_BUF_SIZE; u++)
-                    if(ref->heapid[u]!=0) {
+                for(u=0, heapid_found=0, p=(uint8_t *)ref; u<H5R_DSET_REG_REF_BUF_SIZE; u++)
+                    if(p[u]!=0) {
                         heapid_found=1;
                         break;
                     } /* end if */
@@ -187,7 +187,7 @@ H5R_create(void *_ref, H5G_entry_t *loc, const char *name, H5R_type_t ref_type,
             } /* end if */
 
             /* Zero the heap ID out, may leak heap space if user is re-using reference and doesn't have garbage collection on */
-            HDmemset(ref->heapid,H5R_DSET_REG_REF_BUF_SIZE,0);
+            HDmemset(ref,H5R_DSET_REG_REF_BUF_SIZE,0);
 
             /* Get the amount of space required to serialize the selection */
             if ((buf_size = H5S_SELECT_SERIAL_SIZE(space)) < 0)
@@ -215,7 +215,7 @@ H5R_create(void *_ref, H5G_entry_t *loc, const char *name, H5R_type_t ref_type,
                 HGOTO_ERROR(H5E_REFERENCE, H5E_WRITEERROR, FAIL, "Unable to serialize selection");
 
             /* Serialize the heap ID and index for storage in the file */
-            p=(uint8_t *)ref->heapid;
+            p=(uint8_t *)ref;
             H5F_addr_encode(loc->file,&p,hobjid.addr);
             INT32ENCODE(p,hobjid.idx);
 
@@ -358,7 +358,7 @@ H5R_dereference(H5F_t *file, hid_t dxpl_id, H5R_type_t ref_type, void *_ref)
             uint8_t *buf;   /* Buffer to store serialized selection in */
 
             /* Get the heap ID for the dataset region */
-            p=(uint8_t *)ref->heapid;
+            p=(uint8_t *)ref;
             H5F_addr_decode(ent.file,(const uint8_t **)&p,&(hobjid.addr));
             INT32DECODE(p,hobjid.idx);
 
@@ -525,7 +525,7 @@ H5R_get_region(H5F_t *file, hid_t dxpl_id, H5R_type_t UNUSED ref_type, void *_re
     ent.file=file;
 
     /* Get the heap ID for the dataset region */
-    p=(uint8_t *)ref->heapid;
+    p=(uint8_t *)ref;
     H5F_addr_decode(ent.file,(const uint8_t **)&p,&(hobjid.addr));
     INT32DECODE(p,hobjid.idx);
 
@@ -667,7 +667,7 @@ H5R_get_obj_type(H5F_t *file, hid_t dxpl_id, H5R_type_t ref_type, void *_ref)
             uint8_t *buf;   /* Buffer to store serialized selection in */
 
             /* Get the heap ID for the dataset region */
-            p=(uint8_t *)ref->heapid;
+            p=(uint8_t *)ref;
             H5F_addr_decode(ent.file,(const uint8_t **)&p,&(hobjid.addr));
             INT32DECODE(p,hobjid.idx);
 
diff --git a/src/H5Rpublic.h b/src/H5Rpublic.h
index 574ce80..efffb8c 100644
--- a/src/H5Rpublic.h
+++ b/src/H5Rpublic.h
@@ -57,10 +57,8 @@ typedef haddr_t hobj_ref_t; /* Needs to be large enough to store largest haddr_t
    the Crays and other machines (the heap ID is always encoded as an int32 anyway)
 */
 /* Dataset Region reference structure for user's code */
-typedef struct {
-    unsigned char heapid[H5R_DSET_REG_REF_BUF_SIZE];    /* Buffer to store heap ID and index */
-  /* Needs to be large enough to store largest haddr_t in a worst case machine (ie. 8 bytes currently) plus an int */
-} hdset_reg_ref_t;
+typedef unsigned char hdset_reg_ref_t[H5R_DSET_REG_REF_BUF_SIZE];/* Buffer to store heap ID and index */
+/* Needs to be large enough to store largest haddr_t in a worst case machine (ie. 8 bytes currently) plus an int */
 
 /* Publicly visible datastructures */