[svn-r19153] Description:

    Bring changes on Coverity branch back to trunk:

r19040:
Fixed coverity #440 - NULL check after dereference.  We moved the NULL check up
into the IF block and changed it to assertion.

r19041:
Maintenance: Addressed Coverity issues 441 and 449 by initializing proper
variables

r19042:
In function H5O_chunk_protect (H5Ochunk.c):
 - Initialize H5O_chunk_proxy_t pointers chk_proxy and ret_value.
 - Free chk_proxy on error.

r19043:
Addressed coverity issues 442 - 448 by initializing pointers to NULL.

Tested on:
    Mac OS X/32 10.6.4 (amazon) w/debug & production
    (Too minor to require h5committest)

1 files changed, 46 insertions, 23 deletions

diff --git a/src/H5O.c b/src/H5O.c
index 473dc23..3b4d70a 100644
--- a/src/H5O.c
+++ b/src/H5O.c
@@ -1052,17 +1052,29 @@ H5Oclose(hid_t object_id)
     H5TRACE1("e", "i", object_id);
 
     /* Get the type of the object and close it in the correct way */
-    switch(H5I_get_type(object_id))
-    {
-        case(H5I_GROUP):
-        case(H5I_DATATYPE):
-        case(H5I_DATASET):
+    switch(H5I_get_type(object_id)) {
+        case H5I_GROUP:
+        case H5I_DATATYPE:
+        case H5I_DATASET:
             if(H5I_object(object_id) == NULL)
                 HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a valid object")
             if(H5I_dec_ref(object_id, TRUE) < 0)
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "unable to close object")
             break;
 
+        case H5I_UNINIT:
+        case H5I_BADID:
+        case H5I_FILE:
+        case H5I_DATASPACE:
+        case H5I_ATTR:
+        case H5I_REFERENCE:
+        case H5I_VFL:
+        case H5I_GENPROP_CLS:
+        case H5I_GENPROP_LST:
+        case H5I_ERROR_CLASS:
+        case H5I_ERROR_MSG:
+        case H5I_ERROR_STACK:
+        case H5I_NTYPES:
         default:
             HGOTO_ERROR(H5E_ARGS, H5E_CANTRELEASE, FAIL, "not a valid file object ID (dataset, group, or datatype)")
         break;
@@ -1228,7 +1240,7 @@ H5O_create(H5F_t *f, hid_t dxpl_id, size_t size_hint, hid_t ocpl_id,
     oh->mesg[0].dirty = TRUE;
     oh->mesg[0].native = NULL;
     oh->mesg[0].raw = oh->chunk[0].image + (H5O_SIZEOF_HDR(oh) - H5O_SIZEOF_CHKSUM_OH(oh)) + H5O_SIZEOF_MSGHDR_OH(oh);
-    oh->mesg[0].raw_size = size_hint - H5O_SIZEOF_MSGHDR_OH(oh);
+    oh->mesg[0].raw_size = size_hint - (size_t)H5O_SIZEOF_MSGHDR_OH(oh);
     oh->mesg[0].chunkno = 0;
 
     /* Set metadata tag in dxpl_id */
@@ -1485,7 +1497,7 @@ H5O_link_oh(H5F_t *f, int adjust, hid_t dxpl_id, H5O_t *oh, hbool_t *deleted)
                 HGOTO_ERROR(H5E_OHDR, H5E_LINKCOUNT, FAIL, "link count would be negative")
 
             /* Adjust the link count for the object header */
-            oh->nlink += adjust;
+            oh->nlink = (unsigned)((int)oh->nlink + adjust);
 
             /* Mark object header as dirty in cache */
             if(H5AC_mark_entry_dirty(oh) < 0)
@@ -1517,7 +1529,7 @@ H5O_link_oh(H5F_t *f, int adjust, hid_t dxpl_id, H5O_t *oh, hbool_t *deleted)
             } /* end if */
 
             /* Adjust the link count for the object header */
-            oh->nlink += adjust;
+            oh->nlink = (unsigned)((int)oh->nlink + adjust);
 
             /* Mark object header as dirty in cache */
             if(H5AC_mark_entry_dirty(oh) < 0)
@@ -1674,6 +1686,7 @@ H5O_protect(const H5O_loc_t *loc, hid_t dxpl_id, H5AC_protect_t prot)
          *      when the object header is actually loaded from the file.
          */
         HDassert(udata.made_attempt == TRUE);
+        HDassert(cont_msg_info.msgs);
 
         /* Construct the user data for protecting chunks */
         chk_udata.decoding = TRUE;
@@ -1715,8 +1728,7 @@ H5O_protect(const H5O_loc_t *loc, hid_t dxpl_id, H5AC_protect_t prot)
         } /* end while */
 
         /* Release any continuation messages built up */
-        if(cont_msg_info.msgs)
-            cont_msg_info.msgs = (H5O_cont_t *)H5FL_SEQ_FREE(H5O_cont_t, cont_msg_info.msgs);
+        cont_msg_info.msgs = (H5O_cont_t *)H5FL_SEQ_FREE(H5O_cont_t, cont_msg_info.msgs);
 
         /* Pass back out some of the chunk's user data */
         udata.common.merged_null_msgs = chk_udata.common.merged_null_msgs;
@@ -1990,7 +2002,7 @@ H5O_touch_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh, hbool_t force)
                     break;
 
             /* Create a new message, if necessary */
-            if(idx == oh->nmesgs) {
+            if(idx == (int)oh->nmesgs) {
                 unsigned mesg_flags = 0;        /* Flags for message in object header */
 
                 /* If we would have to create a new message, but we aren't 'forcing' it, get out now */
@@ -2426,23 +2438,35 @@ H5O_get_loc(hid_t object_id)
 
     FUNC_ENTER_NOAPI_NOINIT(H5O_get_loc)
 
-    switch(H5I_get_type(object_id))
-    {
-        case(H5I_GROUP):
+    switch(H5I_get_type(object_id)) {
+        case H5I_GROUP:
             if(NULL == (ret_value = H5O_OBJ_GROUP->get_oloc(object_id)))
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, NULL, "unable to get object location from group ID")
             break;
 
-        case(H5I_DATASET):
+        case H5I_DATASET:
             if(NULL == (ret_value = H5O_OBJ_DATASET->get_oloc(object_id)))
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, NULL, "unable to get object location from dataset ID")
             break;
 
-        case(H5I_DATATYPE):
+        case H5I_DATATYPE:
             if(NULL == (ret_value = H5O_OBJ_DATATYPE->get_oloc(object_id)))
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, NULL, "unable to get object location from datatype ID")
             break;
 
+        case H5I_UNINIT:
+        case H5I_BADID:
+        case H5I_FILE:
+        case H5I_DATASPACE:
+        case H5I_ATTR:
+        case H5I_REFERENCE:
+        case H5I_VFL:
+        case H5I_GENPROP_CLS:
+        case H5I_GENPROP_LST:
+        case H5I_ERROR_CLASS:
+        case H5I_ERROR_MSG:
+        case H5I_ERROR_STACK:
+        case H5I_NTYPES:
         default:
             HGOTO_ERROR(H5E_OHDR, H5E_BADTYPE, NULL, "invalid object type")
     } /* end switch */
@@ -2504,7 +2528,7 @@ H5O_loc_reset(H5O_loc_t *loc)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_loc_copy(H5O_loc_t *dst, const H5O_loc_t *src, H5_copy_depth_t depth)
+H5O_loc_copy(H5O_loc_t *dst, H5O_loc_t *src, H5_copy_depth_t depth)
 {
     FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5O_loc_copy)
 
@@ -2524,8 +2548,7 @@ H5O_loc_copy(H5O_loc_t *dst, const H5O_loc_t *src, H5_copy_depth_t depth)
         if(src->holding_file)
             dst->file->nopen_objs++;
     } else if(depth == H5_COPY_SHALLOW) {
-        /* Discarding 'const' qualifier OK - QAK */
-        H5O_loc_reset((H5O_loc_t *)src);
+        H5O_loc_reset(src);
     } /* end if */
 
     FUNC_LEAVE_NOAPI(SUCCEED)
@@ -2686,7 +2709,7 @@ H5O_get_hdr_info_real(const H5O_t *oh, H5O_hdr_info_t *hdr)
     hdr->flags = oh->flags;
 
     /* Iterate over all the messages, accumulating message size & type information */
-    hdr->space.meta = H5O_SIZEOF_HDR(oh) + (H5O_SIZEOF_CHKHDR_OH(oh) * (oh->nchunks - 1));
+    hdr->space.meta = (hsize_t)H5O_SIZEOF_HDR(oh) + (hsize_t)(H5O_SIZEOF_CHKHDR_OH(oh) * (oh->nchunks - 1));
     hdr->space.mesg = 0;
     hdr->space.free = 0;
     hdr->mesg.present = 0;
@@ -2696,11 +2719,11 @@ H5O_get_hdr_info_real(const H5O_t *oh, H5O_hdr_info_t *hdr)
 
         /* Accumulate space usage information, based on the type of message */
 	if(H5O_NULL_ID == curr_msg->type->id)
-            hdr->space.free += H5O_SIZEOF_MSGHDR_OH(oh) + curr_msg->raw_size;
+            hdr->space.free += (hsize_t)((size_t)H5O_SIZEOF_MSGHDR_OH(oh) + curr_msg->raw_size);
         else if(H5O_CONT_ID == curr_msg->type->id)
-            hdr->space.meta += H5O_SIZEOF_MSGHDR_OH(oh) + curr_msg->raw_size;
+            hdr->space.meta += (hsize_t)((size_t)H5O_SIZEOF_MSGHDR_OH(oh) + curr_msg->raw_size);
         else {
-            hdr->space.meta += H5O_SIZEOF_MSGHDR_OH(oh);
+            hdr->space.meta += (hsize_t)H5O_SIZEOF_MSGHDR_OH(oh);
             hdr->space.mesg += curr_msg->raw_size;
         } /* end else */