[svn-r7562] Purpose:

    Feature add

Description:
    Add a few new fields to the H5G_stat_t structure, to allow more information
about the object header to be retrieved.

Platforms tested:
    FreeBSD 4.9 (sleipnir)
    h5committest

5 files changed, 76 insertions, 2 deletions

diff --git a/src/H5G.c b/src/H5G.c
index 5be0110..7bd23af 100644
--- a/src/H5G.c
+++ b/src/H5G.c
@@ -2558,7 +2558,6 @@ H5G_get_objinfo (H5G_entry_t *loc, const char *name, hbool_t follow_link,
 	    statbuf->objno[1] = 0;
 #endif
 	    statbuf->nlink = H5O_link (&obj_ent, 0, dxpl_id);
-	    statbuf->type = H5G_LINK;
 	    if (NULL==H5O_read(&obj_ent, H5O_MTIME_ID, 0, &(statbuf->mtime), dxpl_id)) {
 		H5E_clear();
                 if (NULL==H5O_read(&obj_ent, H5O_MTIME_NEW_ID, 0, &(statbuf->mtime), dxpl_id)) {
@@ -2568,6 +2567,10 @@ H5G_get_objinfo (H5G_entry_t *loc, const char *name, hbool_t follow_link,
 	    }
 	    statbuf->type = H5G_get_type(&obj_ent, dxpl_id);
 	    H5E_clear(); /*clear errors resulting from checking type*/
+
+            /* Get object header information */
+            if(H5O_get_info(&obj_ent, &(statbuf->ohdr), dxpl_id)<0)
+                HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to get object header information")
 	}
 
         /* Common code to retrieve the file's fileno */
diff --git a/src/H5Gpublic.h b/src/H5Gpublic.h
index c131520..3d74704 100644
--- a/src/H5Gpublic.h
+++ b/src/H5Gpublic.h
@@ -33,6 +33,7 @@
 
 #include "H5public.h"
 #include "H5Ipublic.h"
+#include "H5Opublic.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -93,6 +94,7 @@ typedef struct H5G_stat_t {
 #endif /*H5_WANT_H5_V1_4_COMPAT*/
     time_t		mtime;		/*modification time		*/
     size_t		linklen;	/*symbolic link value length	*/
+    H5O_stat_t          ohdr;           /* Object header information    */
 } H5G_stat_t;
     
 #define H5G_SAME_LOC 0
diff --git a/src/H5O.c b/src/H5O.c
index c6049f5..259557e 100644
--- a/src/H5O.c
+++ b/src/H5O.c
@@ -3264,6 +3264,67 @@ done:
 
 
 /*-------------------------------------------------------------------------
+ * Function:	H5O_get_info
+ *
+ * Purpose:	Retrieve information about an object header
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@ncsa.uiuc.edu
+ *		Oct  7 2003
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_get_info(H5G_entry_t *ent, H5O_stat_t *ostat, hid_t dxpl_id)
+{
+    H5O_t *oh=NULL;             /* Object header information */
+    H5O_mesg_t *curr_msg;       /* Pointer to current message being operated on */
+    hsize_t total_size;         /* Total amount of space used in file */
+    hsize_t free_space;         /* Free space in object header */
+    unsigned u;                 /* Local index variable */
+    herr_t ret_value=SUCCEED;   /* Return value */
+    
+    FUNC_ENTER_NOAPI(H5O_get_info,FAIL);
+
+    /* Check args */
+    assert (ent);
+    assert (ostat);
+
+    /* Get the object header information */
+    if (NULL == (oh = H5AC_protect(ent->file, dxpl_id, H5AC_OHDR, ent->header, NULL, NULL)))
+	HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, FAIL, "unable to load object header");
+
+    /* Iterate over all the messages, accumulating the total size & free space */
+    total_size=H5O_SIZEOF_HDR(ent->file);
+    free_space=0;
+    for (u = 0, curr_msg=&oh->mesg[0]; u < oh->nmesgs; u++,curr_msg++) {
+        /* Accumulate the size for this message */
+        total_size+= H5O_SIZEOF_MSGHDR(ent->file) + curr_msg->raw_size;
+
+        /* Check for this message being free space */
+	if (H5O_NULL_ID == curr_msg->type->id)
+            free_space+= H5O_SIZEOF_MSGHDR(ent->file) + curr_msg->raw_size;
+    } /* end for */
+
+    /* Set the information for this object header */
+    ostat->size=total_size;
+    ostat->free=free_space;
+    ostat->nmesgs=oh->nmesgs;
+    ostat->nchunks=oh->nchunks;
+
+done:
+    if (oh && H5AC_unprotect(ent->file, dxpl_id, H5AC_OHDR, ent->header, oh, FALSE)<0)
+	HDONE_ERROR(H5E_OHDR, H5E_PROTECT, FAIL, "unable to release object header");
+
+    FUNC_LEAVE_NOAPI(ret_value);
+} /* end H5O_get_info() */
+
+
+/*-------------------------------------------------------------------------
  * Function:	H5O_debug_id
  *
  * Purpose:	Act as a proxy for calling the 'debug' method for a
diff --git a/src/H5Oprivate.h b/src/H5Oprivate.h
index fcd4e8d..4219a46 100644
--- a/src/H5Oprivate.h
+++ b/src/H5Oprivate.h
@@ -231,6 +231,7 @@ H5_DLL void *H5O_copy(hid_t type_id, const void *mesg, void *dst);
 H5_DLL size_t H5O_raw_size(hid_t type_id, H5F_t *f, const void *mesg);
 H5_DLL herr_t H5O_get_share(hid_t type_id, H5F_t *f, const void *mesg, H5O_shared_t *share);
 H5_DLL herr_t H5O_delete(H5F_t *f, hid_t dxpl_id, haddr_t addr);
+H5_DLL herr_t H5O_get_info(H5G_entry_t *ent, H5O_stat_t *ostat, hid_t dxpl_id);
 H5_DLL herr_t H5O_debug_id(hid_t type_id, H5F_t *f, hid_t dxpl_id, const void *mesg, FILE *stream, int indent, int fwidth);
 H5_DLL herr_t H5O_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE * stream, int indent,
 			 int fwidth);
diff --git a/src/H5Opublic.h b/src/H5Opublic.h
index 59d117d..e71ff9c 100644
--- a/src/H5Opublic.h
+++ b/src/H5Opublic.h
@@ -14,7 +14,7 @@
 
 /*-------------------------------------------------------------------------
  *
- * Created:             H5Oproto.h
+ * Created:             H5Opublic.h
  *                      Aug  5 1997
  *                      Robb Matzke <matzke@llnl.gov>
  *
@@ -31,6 +31,13 @@
 /* Public headers needed by this file */
 #include "H5public.h"
 
+typedef struct H5O_stat_t {
+    hsize_t size;               /* Total size of object header in file */
+    hsize_t free;               /* Free space within object header */
+    unsigned nmesgs;            /* Number of object header messages */
+    unsigned nchunks;           /* Number of object header chunks */
+} H5O_stat_t;
+
 #ifdef __cplusplus
 extern "C" {
 #endif