fix issues from previous PR comments

38 files changed, 90 insertions, 77 deletions

diff --git a/hl/src/H5LTanalyze.c b/hl/src/H5LTanalyze.c
index 7e8ff31..2219263 100644
--- a/hl/src/H5LTanalyze.c
+++ b/hl/src/H5LTanalyze.c
@@ -1176,12 +1176,12 @@ YY_DECL
 yy_match:
 		do
 			{
-			register YY_CHAR yy_c = (YY_CHAR)yy_ec[YY_SC_TO_UI(*yy_cp)];
+			register YY_CHAR yy_c = yy_ec[YY_SC_TO_UI(*yy_cp)];
 			while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
 				{
 				yy_current_state = (int) yy_def[yy_current_state];
 				if ( yy_current_state >= 545 )
-					yy_c = (YY_CHAR)yy_meta[(unsigned int) yy_c];
+					yy_c = yy_meta[(unsigned int) yy_c];
 				}
 			yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];
 			*(yy_state_ptr)++ = yy_current_state;
@@ -1831,12 +1831,12 @@ static int yy_get_next_buffer (void)
 
 	for ( yy_cp = (yytext_ptr) + YY_MORE_ADJ; yy_cp < (yy_c_buf_p); ++yy_cp )
 		{
-		register YY_CHAR yy_c = (YY_CHAR)(*yy_cp ? yy_ec[YY_SC_TO_UI(*yy_cp)] : 1);
+		register YY_CHAR yy_c = (*yy_cp ? yy_ec[YY_SC_TO_UI(*yy_cp)] : 1);
 		while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
 			{
 			yy_current_state = (int) yy_def[yy_current_state];
 			if ( yy_current_state >= 545 )
-				yy_c = (YY_CHAR)yy_meta[(unsigned int) yy_c];
+				yy_c = yy_meta[(unsigned int) yy_c];
 			}
 		yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];
 		*(yy_state_ptr)++ = yy_current_state;
@@ -1859,7 +1859,7 @@ static int yy_get_next_buffer (void)
 		{
 		yy_current_state = (int) yy_def[yy_current_state];
 		if ( yy_current_state >= 545 )
-			yy_c = (YY_CHAR)yy_meta[(unsigned int) yy_c];
+			yy_c = yy_meta[(unsigned int) yy_c];
 		}
 	yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];
 	yy_is_jam = (yy_current_state == 544);
diff --git a/hl/tools/gif2h5/decompress.c b/hl/tools/gif2h5/decompress.c
index 713ca7e..f8c86f6 100644
--- a/hl/tools/gif2h5/decompress.c
+++ b/hl/tools/gif2h5/decompress.c
@@ -173,7 +173,7 @@ Decompress(GIFIMAGEDESC *GifImageDesc, GIFHEAD *GifHead)
     /* Now read in values from the image descriptor */
     IWidth = GifImageDesc->ImageWidth;
     IHeight = GifImageDesc->ImageHeight;
-    Interlace = (unsigned char)(GifImageDesc->PackedField & 0x40);
+    ASSIGN_TO_SMALLER_SIZE(Interlace, unsigned char, GifImageDesc->PackedField & 0x40, int);
 
     /*
      * Note that I ignore the possible existence of a local color map.  I'm
diff --git a/src/H5Aint.c b/src/H5Aint.c
index 2a0c782..ecbbd48 100644
--- a/src/H5Aint.c
+++ b/src/H5Aint.c
@@ -2026,7 +2026,7 @@ H5A__set_version(const H5F_t *f, H5A_t *attr)
         version = H5O_ATTR_VERSION_1;   /* Write out basic version */
 
     /* Upgrade to the version indicated by the file's low bound if higher */
-    version = (uint8_t)MAX(version, (uint8_t)H5O_attr_ver_bounds[H5F_LOW_BOUND(f)]);
+    ASSIGN_TO_SMALLER_SIZE(version, uint8_t, MAX(version, (uint8_t)H5O_attr_ver_bounds[H5F_LOW_BOUND(f)]), int);
 
     /* Version bounds check */
     if(version > H5O_attr_ver_bounds[H5F_HIGH_BOUND(f)])
diff --git a/src/H5B2cache.c b/src/H5B2cache.c
index 09bb389..fe4827d 100644
--- a/src/H5B2cache.c
+++ b/src/H5B2cache.c
@@ -398,7 +398,7 @@ H5B2__cache_hdr_serialize(const H5F_t *f, void *_image, size_t H5_ATTR_UNUSED le
     *image++ = H5B2_HDR_VERSION;
 
     /* B-tree type */
-    *image++ = (uint8_t)hdr->cls->id;
+    ASSIGN_TO_SMALLER_SIZE(*image++, uint8_t, hdr->cls->id, int);
 
     /* Node size (in bytes) */
     UINT32ENCODE(image, hdr->node_size);
@@ -818,7 +818,7 @@ H5B2__cache_int_serialize(const H5F_t *f, void *_image, size_t H5_ATTR_UNUSED le
     *image++ = H5B2_INT_VERSION;
 
     /* B-tree type */
-    *image++ = (uint8_t)internal->hdr->cls->id;
+    ASSIGN_TO_SMALLER_SIZE(*image++, uint8_t, internal->hdr->cls->id, int);
     HDassert((size_t)(image - (uint8_t *)_image) == (H5B2_INT_PREFIX_SIZE - H5B2_SIZEOF_CHKSUM));
 
     /* Serialize records for internal node */
@@ -1219,7 +1219,7 @@ H5B2__cache_leaf_serialize(const H5F_t H5_ATTR_UNUSED *f, void *_image, size_t H
     *image++ = H5B2_LEAF_VERSION;
 
     /* B-tree type */
-    *image++ = (uint8_t)leaf->hdr->cls->id;
+    ASSIGN_TO_SMALLER_SIZE(*image++, uint8_t, leaf->hdr->cls->id, int);
     HDassert((size_t)(image - (uint8_t *)_image) == (H5B2_LEAF_PREFIX_SIZE - H5B2_SIZEOF_CHKSUM));
 
     /* Serialize records for leaf node */
diff --git a/src/H5B2int.c b/src/H5B2int.c
index ea03ed6..ff835eb 100644
--- a/src/H5B2int.c
+++ b/src/H5B2int.c
@@ -239,7 +239,7 @@ H5B2__split1(H5B2_hdr_t *hdr, uint16_t depth, H5B2_node_ptr_t *curr_node_ptr,
     old_node_nrec = internal->node_ptrs[idx].node_nrec;
 
     /* Determine "middle" record to promote to internal node */
-    mid_record = (uint16_t)(old_node_nrec / 2);
+    ASSIGN_TO_SMALLER_SIZE(mid_record, uint16_t, old_node_nrec / 2, int);
 
     /* Copy "upper half" of records to new child */
     H5MM_memcpy(H5B2_NAT_NREC(right_native, hdr, 0),
diff --git a/src/H5Dchunk.c b/src/H5Dchunk.c
index ecb0f9c..d28beb8 100644
--- a/src/H5Dchunk.c
+++ b/src/H5Dchunk.c
@@ -2180,7 +2180,7 @@ H5D__create_chunk_mem_map_1d(const H5D_chunk_map_t *fm)
         /* Iterate over each chunk in the chunk list */
         curr_node = H5SL_first(fm->sel_chunks);
         while(curr_node) {
-            hssize_t    schunk_points;          /* Number of elements in chunk selection */
+            hsize_t     schunk_points;          /* Number of elements in chunk selection */
             hsize_t     tmp_count = 1;
 
             /* Get pointer to chunk's information */
@@ -2191,9 +2191,9 @@ H5D__create_chunk_mem_map_1d(const H5D_chunk_map_t *fm)
             if((chunk_info->mspace = H5S_copy(fm->mem_space, TRUE, FALSE)) == NULL)
                 HGOTO_ERROR(H5E_DATASPACE, H5E_CANTCOPY, FAIL, "unable to copy memory space")
 
-            schunk_points = H5S_GET_SELECT_NPOINTS(chunk_info->fspace);
+            schunk_points = (hsize_t)H5S_GET_SELECT_NPOINTS(chunk_info->fspace);
 
-            if(H5S_select_hyperslab(chunk_info->mspace, H5S_SELECT_SET, mem_sel_start, NULL, &tmp_count, &(const hsize_t)schunk_points) < 0)
+            if(H5S_select_hyperslab(chunk_info->mspace, H5S_SELECT_SET, mem_sel_start, NULL, &tmp_count, &schunk_points) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTSELECT, FAIL, "can't create chunk memory selection")
 
             mem_sel_start[0] += schunk_points;
@@ -5668,7 +5668,7 @@ H5D__chunk_addrmap_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
     hsize_t        chunk_index;
     int            ret_value = H5_ITER_CONT;     /* Return value */
 
-    FUNC_ENTER_STATIC
+    FUNC_ENTER_STATIC_NOERR
 
     /* Compute the index for this chunk */
     chunk_index = H5VM_array_offset_pre(rank, udata->common.layout->down_chunks, chunk_rec->scaled);
diff --git a/src/H5Dint.c b/src/H5Dint.c
index bd87c7f..772a150 100644
--- a/src/H5Dint.c
+++ b/src/H5Dint.c
@@ -2197,7 +2197,7 @@ H5D_nameof(const H5D_t *dataset)
     /* Use FUNC_ENTER_NOAPI_NOINIT_NOERR here to avoid performance issues */
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
-    FUNC_LEAVE_NOAPI((H5G_name_t *)(dataset ? &(dataset->path) : NULL))
+    FUNC_LEAVE_NOAPI(dataset ? &(dataset->path) : NULL)
 } /* end H5D_nameof() */
 
 
diff --git a/src/H5EAcache.c b/src/H5EAcache.c
index 7b1968e..b51d29e 100644
--- a/src/H5EAcache.c
+++ b/src/H5EAcache.c
@@ -487,7 +487,7 @@ H5EA__cache_hdr_serialize(const H5F_t *f, void *_image, size_t H5_ATTR_UNUSED le
     *image++ = H5EA_HDR_VERSION;
 
     /* Extensible array type */
-    *image++ = (uint8_t)hdr->cparam.cls->id;
+    ASSIGN_TO_SMALLER_SIZE(*image++, uint8_t, hdr->cparam.cls->id, int);
 
     /* General array creation/configuration information */
     *image++ = hdr->cparam.raw_elmt_size;          /* Element size in file (in bytes) */
diff --git a/src/H5FAcache.c b/src/H5FAcache.c
index e142ae2..2b5187d 100644
--- a/src/H5FAcache.c
+++ b/src/H5FAcache.c
@@ -418,6 +418,7 @@ H5FA__cache_hdr_serialize(const H5F_t *f, void *_image, size_t H5_ATTR_UNUSED le
 
     /* Fixed array type */
     *image++ = (uint8_t)hdr->cparam.cls->id;
+    ASSIGN_TO_SMALLER_SIZE(*image++, uint8_t, hdr->cparam.cls->id, int);
 
     /* General array creation/configuration information */
     *image++ = hdr->cparam.raw_elmt_size;          /* Element size in file (in bytes) */
diff --git a/src/H5FScache.c b/src/H5FScache.c
index fbdada2..d4f77f4 100644
--- a/src/H5FScache.c
+++ b/src/H5FScache.c
@@ -735,7 +735,7 @@ H5FS__cache_hdr_serialize(const H5F_t *f, void *_image, size_t len,
     *image++ = H5FS_HDR_VERSION;
 
     /* Client ID */
-    *image++ = (uint8_t)fspace->client;
+    ASSIGN_TO_SMALLER_SIZE(*image++, uint8_t, fspace->client, int);
 
     /* Total space tracked */
     H5F_ENCODE_LENGTH(f, image, fspace->tot_space);
@@ -1046,8 +1046,8 @@ H5FS__cache_sinfo_deserialize(const void *_image, size_t len, void *_udata,
 
         /* Walk through the image, deserializing sections */
         do {
-            hsize_t sect_size;      /* Current section size */
-            size_t node_count;      /* # of sections of this size */
+            hsize_t sect_size = 1;      /* Current section size */
+            size_t node_count = 1;      /* # of sections of this size */
             size_t u;               /* Local index variable */
 
             /* The number of sections of this node's size */
@@ -1061,7 +1061,7 @@ H5FS__cache_sinfo_deserialize(const void *_image, size_t len, void *_udata,
             /* Loop over nodes of this size */
             for(u = 0; u < node_count; u++) {
                 H5FS_section_info_t *new_sect;  /* Section that was deserialized */
-                haddr_t sect_addr;      /* Address of free space section in the address space */
+                haddr_t sect_addr = 1;  /* Address of free space section in the address space */
                 unsigned sect_type;     /* Type of free space section */
                 unsigned des_flags;     /* Flags from deserialize callback */
 
diff --git a/src/H5Fprivate.h b/src/H5Fprivate.h
index 9ad33b2..0fe1867 100644
--- a/src/H5Fprivate.h
+++ b/src/H5Fprivate.h
@@ -178,19 +178,19 @@ typedef struct H5F_t H5F_t;
 
 /* Decode a variable-sized buffer */
 /* (Assumes that the high bits of the integer will be zero) */
-#  define DECODE_VAR(p, n, l) {                              \
+#  define DECODE_VAR(p, typ, n, l) {                              \
    size_t _i;                                      \
                                         \
    n = 0;                                      \
    (p) += l;                                      \
    for (_i = 0; _i < l; _i++)                              \
-      n = (uint16_t)((n << 8) | *(--p));                              \
+      n = (typ)((n << 8) | *(--p));                              \
    (p) += l;                                      \
 }
 
 /* Decode a variable-sized buffer into a 32-bit unsigned integer */
 /* (Assumes that the high bits of the integer will be zero) */
-#  define UINT32DECODE_VAR(p, n, l)     DECODE_VAR(p, n, l)
+#  define UINT32DECODE_VAR(p, n, l)     DECODE_VAR(p, uint32_t, n, l)
 
 #  define INT64DECODE(p, n) {                              \
    /* WE DON'T CHECK FOR OVERFLOW! */                          \
@@ -216,14 +216,14 @@ typedef struct H5F_t H5F_t;
 
 /* Decode a variable-sized buffer into a 64-bit unsigned integer */
 /* (Assumes that the high bits of the integer will be zero) */
-#  define UINT64DECODE_VAR(p, n, l)     DECODE_VAR(p, n, l)
+#  define UINT64DECODE_VAR(p, n, l)     DECODE_VAR(p, uint64_t, n, l)
 
 /* Decode a 64-bit unsigned integer and its length from a variable-sized buffer */
 /* (Assumes that the high bits of the integer will be zero) */
 #  define UINT64DECODE_VARLEN(p, n) {                          \
    unsigned _s = *(p)++;                              \
                                         \
-   UINT64DECODE_VAR(p, n, _s);                              \
+   UINT64DECODE_VAR(p, uint64_t, n, _s);                              \
 }
 
 #  define H5_DECODE_UNSIGNED(p, n) {                          \
diff --git a/src/H5HFtest.c b/src/H5HFtest.c
index 9eb8ed2..b0291b8 100644
--- a/src/H5HFtest.c
+++ b/src/H5HFtest.c
@@ -481,7 +481,7 @@ H5HF_get_id_type_test(const void *_id, unsigned char *obj_type)
     HDassert(obj_type);
 
     /* Get the type for a heap ID */
-    *obj_type = (unsigned char)(*id & H5HF_ID_TYPE_MASK);
+    ASSIGN_TO_SMALLER_SIZE(*obj_type, unsigned char, *id & H5HF_ID_TYPE_MASK, int);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* H5HF_get_id_type_test() */
diff --git a/src/H5Oainfo.c b/src/H5Oainfo.c
index 23aba09..d923a9f 100644
--- a/src/H5Oainfo.c
+++ b/src/H5Oainfo.c
@@ -194,7 +194,7 @@ H5O_ainfo_encode(H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, uint8_t *p, co
     *p++ = H5O_AINFO_VERSION;
 
     /* The flags for the attribute indices */
-    flags = (unsigned char)(ainfo->track_corder ? H5O_AINFO_TRACK_CORDER : 0);
+    ASSIGN_TO_SMALLER_SIZE(flags, unsigned char, ainfo->track_corder ? H5O_AINFO_TRACK_CORDER : 0, int);
     flags = (unsigned char)(flags | (ainfo->index_corder ? H5O_AINFO_INDEX_CORDER : 0));
     *p++ = flags;
 
diff --git a/src/H5Oattr.c b/src/H5Oattr.c
index b7d4dd5..2697959 100644
--- a/src/H5Oattr.c
+++ b/src/H5Oattr.c
@@ -328,8 +328,9 @@ H5O_attr_encode(H5F_t *f, uint8_t *p, const void *mesg)
     UINT16ENCODE(p, attr->shared->ds_size);
 
     /* The character encoding for the attribute's name, in later versions */
-    if(attr->shared->version >= H5O_ATTR_VERSION_3)
-        *p++ = (uint8_t)attr->shared->encoding;
+    if(attr->shared->version >= H5O_ATTR_VERSION_3) {
+        ASSIGN_TO_SMALLER_SIZE(*p++, uint8_t, attr->shared->encoding, int);
+    }
 
     /* Write the name including null terminator */
     H5MM_memcpy(p, attr->shared->name, name_len);
diff --git a/src/H5Ofill.c b/src/H5Ofill.c
index cb75bc3..14b12db 100644
--- a/src/H5Ofill.c
+++ b/src/H5Ofill.c
@@ -408,10 +408,10 @@ H5O_fill_new_encode(H5F_t H5_ATTR_UNUSED *f, uint8_t *p, const void *_fill)
 
     if(fill->version < H5O_FILL_VERSION_3) {
         /* Space allocation time */
-        *p++ = (uint8_t)fill->alloc_time;
+        ASSIGN_TO_SMALLER_SIZE(*p++, uint8_t, fill->alloc_time, int);
 
         /* Fill value writing time */
-        *p++ = (uint8_t)fill->fill_time;
+        ASSIGN_TO_SMALLER_SIZE(*p++, uint8_t, fill->fill_time, int);
 
         /* Whether fill value is defined */
         *p++ = (uint8_t)fill->fill_defined;
diff --git a/src/H5Ofsinfo.c b/src/H5Ofsinfo.c
index fd62aa2..82afa96 100644
--- a/src/H5Ofsinfo.c
+++ b/src/H5Ofsinfo.c
@@ -225,6 +225,7 @@ H5O_fsinfo_encode(H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, uint8_t *p, c
 
     *p++ = (uint8_t)fsinfo->version;    /* message version */
     *p++ = (uint8_t)fsinfo->strategy;        /* File space strategy */
+    ASSIGN_TO_SMALLER_SIZE(*p++, uint8_t, fsinfo->strategy, unsigned);
     *p++ = (unsigned char)fsinfo->persist;    /* Free-space persist or not */
     H5F_ENCODE_LENGTH(f, p, fsinfo->threshold); /* Free-space section size threshold */
 
diff --git a/src/H5Oginfo.c b/src/H5Oginfo.c
index abe7879..027f33c 100644
--- a/src/H5Oginfo.c
+++ b/src/H5Oginfo.c
@@ -183,7 +183,7 @@ H5O_ginfo_encode(H5F_t H5_ATTR_UNUSED *f, hbool_t H5_ATTR_UNUSED disable_shared,
     *p++ = H5O_GINFO_VERSION;
 
     /* The flags for the group info */
-    flags = (unsigned char)(ginfo->store_link_phase_change ?  H5O_GINFO_STORE_PHASE_CHANGE : 0);
+    ASSIGN_TO_SMALLER_SIZE(flags, unsigned char, ginfo->store_link_phase_change ?  H5O_GINFO_STORE_PHASE_CHANGE : 0, int);
     flags = (unsigned char)(flags | (ginfo->store_est_entry_info ?  H5O_GINFO_STORE_EST_ENTRY_INFO : 0));
     *p++ = flags;
 
diff --git a/src/H5Oint.c b/src/H5Oint.c
index 9d4c066..b923605 100644
--- a/src/H5Oint.c
+++ b/src/H5Oint.c
@@ -239,7 +239,7 @@ H5O_set_version(H5F_t *f, H5O_t *oh, uint8_t oh_flags, hbool_t store_msg_crt_idx
         version = H5O_VERSION_1;
 
     /* Upgrade to the version indicated by the file's low bound if higher */
-    version = (uint8_t)MAX(version, (uint8_t)H5O_obj_ver_bounds[H5F_LOW_BOUND(f)]);
+    ASSIGN_TO_SMALLER_SIZE(version, uint8_t, MAX(version, (uint8_t)H5O_obj_ver_bounds[H5F_LOW_BOUND(f)]), int);
 
     /* Version bounds check */
     if(version > H5O_obj_ver_bounds[H5F_HIGH_BOUND(f)])
diff --git a/src/H5Olayout.c b/src/H5Olayout.c
index 2a2a07b..143f49e 100644
--- a/src/H5Olayout.c
+++ b/src/H5Olayout.c
@@ -570,7 +570,7 @@ H5O__layout_encode(H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, uint8_t *p,
              H5O_LAYOUT_VERSION_3 : mesg->version);
 
     /* Layout class */
-    *p++ = (uint8_t)mesg->type;
+    ASSIGN_TO_SMALLER_SIZE(*p++, uint8_t, mesg->type, int);
 
     /* Write out layout class specific information */
     switch(mesg->type) {
diff --git a/src/H5Olinfo.c b/src/H5Olinfo.c
index 475f66f..f605e8e 100644
--- a/src/H5Olinfo.c
+++ b/src/H5Olinfo.c
@@ -203,7 +203,7 @@ H5O_linfo_encode(H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, uint8_t *p, co
     *p++ = H5O_LINFO_VERSION;
 
     /* The flags for the link indices */
-    index_flags = (unsigned char)(linfo->track_corder ? H5O_LINFO_TRACK_CORDER : 0);
+    ASSIGN_TO_SMALLER_SIZE(index_flags, uint8_t, linfo->track_corder ? H5O_LINFO_TRACK_CORDER : 0, int);
     index_flags = (uint8_t)(index_flags | (linfo->index_corder ? H5O_LINFO_INDEX_CORDER : 0));
     *p++ = index_flags;
 
diff --git a/src/H5Olink.c b/src/H5Olink.c
index 1f0c6c7..3453565 100644
--- a/src/H5Olink.c
+++ b/src/H5Olink.c
@@ -316,7 +316,7 @@ H5O_link_encode(H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, uint8_t *p, con
 
     /* Store the type of a non-default link */
     if(link_flags & H5O_LINK_STORE_LINK_TYPE)
-        *p++ = (uint8_t)lnk->type;
+        ASSIGN_TO_SMALLER_SIZE(*p++, uint8_t, lnk->type, int);
 
     /* Store the link creation order in the file, if its valid */
     if(lnk->corder_valid)
diff --git a/src/H5Osdspace.c b/src/H5Osdspace.c
index 33310dc..7b6c444 100644
--- a/src/H5Osdspace.c
+++ b/src/H5Osdspace.c
@@ -256,8 +256,9 @@ H5O_sdspace_encode(H5F_t *f, uint8_t *p, const void *_mesg)
     *p++ = (uint8_t)flags;
 
     /* Dataspace type */
-    if(sdim->version > H5O_SDSPACE_VERSION_1)
-        *p++ = (uint8_t)sdim->type;
+    if(sdim->version > H5O_SDSPACE_VERSION_1) {
+        ASSIGN_TO_SMALLER_SIZE(*p++, uint8_t, sdim->type, int);
+    }
     else {
         *p++ = 0; /*reserved*/
         *p++ = 0; /*reserved*/
diff --git a/src/H5Rint.c b/src/H5Rint.c
index 77227ec..a318ddc 100644
--- a/src/H5Rint.c
+++ b/src/H5Rint.c
@@ -993,7 +993,7 @@ H5R__decode(const unsigned char *buf, size_t *nbytes, H5R_ref_priv_t *ref)
         HGOTO_ERROR(H5E_REFERENCE, H5E_CANTDECODE, FAIL, "Buffer size is too small")
 
     /* Set new reference */
-    ref->type = (int8_t)((H5R_type_t)*p++);
+    ASSIGN_TO_SMALLER_SIZE(ref->type, int8_t, (H5R_type_t)*p++, int);
     if(ref->type <= H5R_BADTYPE || ref->type >= H5R_MAXTYPE)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference type")
 
diff --git a/src/H5SMcache.c b/src/H5SMcache.c
index ee28fa4..40692cd 100644
--- a/src/H5SMcache.c
+++ b/src/H5SMcache.c
@@ -397,7 +397,7 @@ H5SM__cache_table_serialize(const H5F_t *f, void *_image, size_t len,
         *image++ = H5SM_LIST_VERSION;
 
         /* Is message index a list or a B-tree? */
-        *image++ = (uint8_t)table->indexes[u].index_type;
+        ASSIGN_TO_SMALLER_SIZE(*image++, uint8_t, table->indexes[u].index_type, int);
 
         /* Type of messages in the index */
         UINT16ENCODE(image, table->indexes[u].mesg_types);
diff --git a/src/H5SMmessage.c b/src/H5SMmessage.c
index e085204..2a04423 100644
--- a/src/H5SMmessage.c
+++ b/src/H5SMmessage.c
@@ -298,7 +298,7 @@ H5SM__message_encode(uint8_t *raw, const void *_nrecord, void *_ctx)
     /* Sanity check */
     HDassert(ctx);
 
-    *raw++ = (uint8_t)message->location;
+    ASSIGN_TO_SMALLER_SIZE(*raw++, uint8_t, message->location, int);
     UINT32ENCODE(raw, message->hash);
 
     if(message->location == H5SM_IN_HEAP) {
diff --git a/src/H5Shyper.c b/src/H5Shyper.c
index cfcc5ac..0f73e7b 100644
--- a/src/H5Shyper.c
+++ b/src/H5Shyper.c
@@ -3674,7 +3674,7 @@ H5S__hyper_get_version_enc_size(const H5S_t *space, hsize_t block_count, uint32_
                 /* Determine the encoding size */
                 enc2 = H5S__hyper_get_enc_size_real(max2);
 
-                *enc_size = (uint8_t)MAX(enc1, enc2);
+                ASSIGN_TO_SMALLER_SIZE(*enc_size, uint8_t, MAX(enc1, enc2), int);
             } /* end if */
             else {
                 hsize_t max_size = block_count;
diff --git a/src/H5Tbit.c b/src/H5Tbit.c
index c6c1777..1a7ea9b 100644
--- a/src/H5Tbit.c
+++ b/src/H5Tbit.c
@@ -363,7 +363,7 @@ H5T__bit_set(uint8_t *buf, size_t offset, size_t size, hbool_t value)
 
     /* The middle bytes */
     while (size >= 8) {
-        buf[idx++] = (uint8_t)(value ? 0xff : 0x00);
+        ASSIGN_TO_SMALLER_SIZE(buf[idx++], uint8_t, value ? 0xff : 0x00, int);
         size -= 8;
     }
 
@@ -532,7 +532,7 @@ H5T__bit_inc(uint8_t *buf, size_t start, size_t size)
         acc = buf[idx];
         acc++;
         carry = acc & 0x100;
-        buf[idx] = (uint8_t)(acc & 0xff);
+        ASSIGN_TO_SMALLER_SIZE(buf[idx], uint8_t, acc & 0xff, unsigned);
         idx++;
         size -= 8;
     }
diff --git a/test/dsets.c b/test/dsets.c
index b32c5b6..15d319c 100644
--- a/test/dsets.c
+++ b/test/dsets.c
@@ -5293,7 +5293,7 @@ test_types(hid_t file)
     (space=H5Screate_simple(1, &nelmts, NULL)) < 0 ||
     (dset=H5Dcreate2(grp, "bitfield_1", type, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0)
     goto error;
-    for(i=0; i<sizeof buf; i++) buf[i] = (unsigned char)(0xff ^ i);
+    for(i=0; i<sizeof buf; i++) ASSIGN_TO_SMALLER_SIZE(buf[i], unsigned char, 0xff ^ i, size_t);
     if(H5Dwrite(dset, type, H5S_ALL, H5S_ALL, H5P_DEFAULT, buf) < 0)
     goto error;
 
@@ -5307,7 +5307,7 @@ test_types(hid_t file)
     (space=H5Screate_simple(1, &nelmts, NULL)) < 0 ||
     (dset=H5Dcreate2(grp, "bitfield_2", type, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0)
     goto error;
-    for(i=0; i<sizeof buf; i++) buf[i] = (unsigned char)(0xff ^ i);
+    for(i=0; i<sizeof buf; i++) ASSIGN_TO_SMALLER_SIZE(buf[i], unsigned char, 0xff ^ i, size_t);
     if(H5Dwrite(dset, type, H5S_ALL, H5S_ALL, H5P_DEFAULT, buf) < 0)
     goto error;
     if(H5Sclose(space) < 0) goto error;
@@ -5322,7 +5322,7 @@ test_types(hid_t file)
             (dset = H5Dcreate2(grp, "opaque_1", type, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0)
     goto error;
     for(i = 0; i < sizeof buf; i++)
-        buf[i] = (unsigned char)(0xff ^ i);
+        ASSIGN_TO_SMALLER_SIZE(buf[i], unsigned char, 0xff ^ i, size_t);
     if(H5Dwrite(dset, type, H5S_ALL, H5S_ALL, H5P_DEFAULT, buf) < 0) goto error;
     if(H5Sclose(space) < 0) goto error;
     if(H5Tclose(type) < 0) goto error;
diff --git a/test/dtypes.c b/test/dtypes.c
index 5238306..5369351 100644
--- a/test/dtypes.c
+++ b/test/dtypes.c
@@ -1216,8 +1216,8 @@ test_compound_6(void)
     orig = (unsigned char*)HDmalloc(nelmts * sizeof(struct st));
     for (i=0; i<(int)nelmts; i++) {
         s_ptr = ((struct st*)((void *)orig)) + i;
-        s_ptr->b    = (short)((i*8+1) & 0x7fff);
-        s_ptr->d    = (short)((i*8+6) & 0x7fff);
+        ASSIGN_TO_SMALLER_SIZE(s_ptr->b, short, (i*8+1) & 0x7fff, int);
+        ASSIGN_TO_SMALLER_SIZE(s_ptr->d, short, (i*8+6) & 0x7fff, int);
     }
     HDmemcpy(buf, orig, nelmts*sizeof(struct st));
 
diff --git a/test/ntypes.c b/test/ntypes.c
index f1d2449..03eefe6 100644
--- a/test/ntypes.c
+++ b/test/ntypes.c
@@ -2484,7 +2484,7 @@ test_opaque_dtype(hid_t file)
         TEST_ERROR;
 
     for(i = 0; i < sizeof(wbuf); i++)
-        wbuf[i] = (unsigned char)(0xff ^ i);
+        ASSIGN_TO_SMALLER_SIZE(wbuf[i], unsigned char, 0xff ^ i, size_t);
 
     if(H5Dwrite(dset, type, H5S_ALL, H5S_ALL, H5P_DEFAULT, wbuf) < 0) TEST_ERROR;
     if(H5Sclose(space) < 0) TEST_ERROR;
diff --git a/test/tsohm.c b/test/tsohm.c
index 0fc273b..c126608 100644
--- a/test/tsohm.c
+++ b/test/tsohm.c
@@ -3342,11 +3342,11 @@ test_sohm_extlink(void)
 static int
 verify_dataset_extension(hid_t fcpl_id, hbool_t close_reopen)
 {
-    hid_t file_id = -1;
-    hid_t orig_space_id = -1;
+    hid_t file_id = H5I_INVALID_HID;
+    hid_t orig_space_id = H5I_INVALID_HID;
     hid_t space1_id, space2_id, space3_id;
-    hid_t dcpl_id = -1;
-    hid_t dset1_id, dset2_id = -1, dset3_id = -1;
+    hid_t dcpl_id = H5I_INVALID_HID;
+    hid_t dset1_id, dset2_id = H5I_INVALID_HID, dset3_id = H5I_INVALID_HID;
     hsize_t dims1[] = {1, 2};
     hsize_t max_dims[] = {H5S_UNLIMITED, 2};
     hsize_t dims2[] = {5, 2};
diff --git a/testpar/t_mpi.c b/testpar/t_mpi.c
index 2bb2336..79eda60 100644
--- a/testpar/t_mpi.c
+++ b/testpar/t_mpi.c
@@ -303,7 +303,7 @@ static int test_mpio_gb_file(char *filename) {
                             mpi_rank, mpi_off, mpi_off);
                 /* set data to some trivial pattern for easy verification */
                 for (j = 0; j < MB; j++)
-                    *(buf + j) = (char)(i * mpi_size + mpi_rank);
+                    ASSIGN_TO_SMALLER_SIZE(*(buf + j), char, i * mpi_size + mpi_rank, int);
                 if (VERBOSE_MED)
                     HDfprintf(stdout,
                             "proc %d: writing %d bytes at offset %lld\n",
@@ -351,7 +351,7 @@ static int test_mpio_gb_file(char *filename) {
                 mrc = MPI_File_read_at(fh, mpi_off, buf, MB, MPI_BYTE,
                         &mpi_stat);
                 INFO((mrc == MPI_SUCCESS), "GB size file read");
-                expected = (char)(i * mpi_size + (mpi_size - mpi_rank - 1));
+                ASSIGN_TO_SMALLER_SIZE(expected, char, i * mpi_size + (mpi_size - mpi_rank - 1), int);
                 vrfyerrs = 0;
                 for (j = 0; j < MB; j++) {
                     if ((*(buf + j) != expected)
@@ -526,7 +526,7 @@ static int test_mpio_1wMr(char *filename, int special_request) {
     * ==================================================*/
     irank = 0;
     for (i = 0; i < DIMSIZE; i++)
-        writedata[i] = (unsigned char)(irank * DIMSIZE + i);
+        ASSIGN_TO_SMALLER_SIZE(writedata[i], unsigned char, irank * DIMSIZE + i, int)
     mpi_off = irank * DIMSIZE;
 
     /* Only one process writes */
@@ -597,7 +597,7 @@ static int test_mpio_1wMr(char *filename, int special_request) {
         return 1;
     };
     for (i = 0; i < DIMSIZE; i++) {
-        expect_val = (unsigned char)(irank * DIMSIZE + i);
+        ASSIGN_TO_SMALLER_SIZE(expect_val, unsigned char, irank * DIMSIZE + i, int);
         if (readdata[i] != expect_val) {
             PRINTID;
             HDprintf("read data[%d:%d] got %02x, expect %02x\n", irank, i,
@@ -697,7 +697,7 @@ static int test_mpio_derived_dtype(char *filename) {
     MPI_Comm_rank(MPI_COMM_WORLD, &mpi_rank);
     retcode = 0;
     for (i = 0; i < 3; i++)
-        buf[i] = (char)(i + 1);
+        ASSIGN_TO_SMALLER_SIZE(buf[i], char, i + 1, int);
 
     if ((mpi_err = MPI_File_open(MPI_COMM_WORLD, filename,
             MPI_MODE_RDWR | MPI_MODE_CREATE, MPI_INFO_NULL, &fh))
diff --git a/tools/src/h5import/h5import.c b/tools/src/h5import/h5import.c
index 40b812f..2cd826b 100644
--- a/tools/src/h5import/h5import.c
+++ b/tools/src/h5import/h5import.c
@@ -4707,14 +4707,20 @@ static int process(struct Options *opt)
     return (0);
 }
 
-uint16_t swap_uint16( uint16_t val)
+uint16_t swap_uint16(uint16_t val)
 {
-    return (uint16_t)((val << 8) | (val >> 8));
+    uint16_t ret;
+
+    ASSIGN_TO_SMALLER_SIZE(ret, uint16_t, (val << 8) | (val >> 8), int);
+    return ret;
 }
 
 int16_t swap_int16(int16_t val)
 {
-    return (uint16_t)((val << 8) | ((val >> 8) & 0xFF));
+    uint16_t ret;
+
+    ASSIGN_TO_SMALLER_SIZE(ret, int16_t, (val << 8) | ((val >> 8) & 0xFF), int);
+    return ret;
 }
 
 uint32_t swap_uint32(uint32_t val)
diff --git a/tools/test/h5diff/dynlib_diff.c b/tools/test/h5diff/dynlib_diff.c
index 4f2d435..5989b38 100644
--- a/tools/test/h5diff/dynlib_diff.c
+++ b/tools/test/h5diff/dynlib_diff.c
@@ -16,6 +16,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include "H5PLextern.h"
+#include "H5private.h"
 
 #define H5Z_FILTER_DYNLIBUD      300
 #define MULTIPLIER              3
@@ -69,7 +70,7 @@ H5Z_filter_dynlibud(unsigned int flags, size_t cd_nelmts,
         /* Subtract the original value with MULTIPLIER */
         while(buf_left > 0) {
             char temp = *int_ptr;
-            *int_ptr = (char)(temp - MULTIPLIER);
+            ASSIGN_TO_SMALLER_SIZE(*int_ptr, char, temp - MULTIPLIER, int);
             int_ptr++;
             buf_left -= sizeof(*int_ptr);
         } /* end while */
@@ -78,7 +79,7 @@ H5Z_filter_dynlibud(unsigned int flags, size_t cd_nelmts,
         /* Add the original value with MULTIPLIER */
         while(buf_left > 0) {
             char temp = *int_ptr;
-            *int_ptr = (char)(temp + MULTIPLIER);
+            ASSIGN_TO_SMALLER_SIZE(*int_ptr, char, temp + MULTIPLIER, int);
             int_ptr++;
             buf_left -= sizeof(*int_ptr);
         } /* end while */
diff --git a/tools/test/h5dump/dynlib_dump.c b/tools/test/h5dump/dynlib_dump.c
index 4f2d435..5989b38 100644
--- a/tools/test/h5dump/dynlib_dump.c
+++ b/tools/test/h5dump/dynlib_dump.c
@@ -16,6 +16,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include "H5PLextern.h"
+#include "H5private.h"
 
 #define H5Z_FILTER_DYNLIBUD      300
 #define MULTIPLIER              3
@@ -69,7 +70,7 @@ H5Z_filter_dynlibud(unsigned int flags, size_t cd_nelmts,
         /* Subtract the original value with MULTIPLIER */
         while(buf_left > 0) {
             char temp = *int_ptr;
-            *int_ptr = (char)(temp - MULTIPLIER);
+            ASSIGN_TO_SMALLER_SIZE(*int_ptr, char, temp - MULTIPLIER, int);
             int_ptr++;
             buf_left -= sizeof(*int_ptr);
         } /* end while */
@@ -78,7 +79,7 @@ H5Z_filter_dynlibud(unsigned int flags, size_t cd_nelmts,
         /* Add the original value with MULTIPLIER */
         while(buf_left > 0) {
             char temp = *int_ptr;
-            *int_ptr = (char)(temp + MULTIPLIER);
+            ASSIGN_TO_SMALLER_SIZE(*int_ptr, char, temp + MULTIPLIER, int);
             int_ptr++;
             buf_left -= sizeof(*int_ptr);
         } /* end while */
diff --git a/tools/test/h5dump/h5dumpgentest.c b/tools/test/h5dump/h5dumpgentest.c
index 85fe754..2f8c1a6 100644
--- a/tools/test/h5dump/h5dumpgentest.c
+++ b/tools/test/h5dump/h5dumpgentest.c
@@ -2565,7 +2565,7 @@ static void gent_bitfields(void)
         goto error;
 
     for(i = 0; i < sizeof buf; i++)
-        buf[i] = (unsigned char)(0xff ^ i);
+        ASSIGN_TO_SMALLER_SIZE(buf[i], unsigned char, 0xff ^ i, size_t);
     if(H5Dwrite(dset, type, H5S_ALL, H5S_ALL, H5P_DEFAULT, buf) < 0)
         goto error;
     if(H5Sclose(space) < 0) goto error;
@@ -2579,7 +2579,7 @@ static void gent_bitfields(void)
             (dset = H5Dcreate2(grp, "bitfield_2", type, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0)
         goto error;
     for(i = 0; i < sizeof buf; i++)
-        buf[i] = (unsigned char)(0xff ^ i);
+        ASSIGN_TO_SMALLER_SIZE(buf[i], unsigned char, 0xff ^ i, size_t);
     if(H5Dwrite(dset, type, H5S_ALL, H5S_ALL, H5P_DEFAULT, buf) < 0)
         goto error;
     if(H5Sclose(space) < 0) goto error;
@@ -9814,7 +9814,7 @@ static void gent_bitnopaquefields(void)
             if ((space = H5Screate_simple(1, &nelmts, NULL)) >= 0) {
                 if ((dset = H5Dcreate2(grp, "bitfield_1", type, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) >= 0) {
                     for (i = 0; i < nelmts; i++) {
-                        buf[i] = (uint8_t)(0xff ^ i);
+                        ASSIGN_TO_SMALLER_SIZE(buf[i], uint8_t, 0xff ^ i, size_t);
                     }
                     H5Dwrite(dset, type, H5S_ALL, H5S_ALL, H5P_DEFAULT, buf);
                     H5Dclose(dset);
@@ -9829,7 +9829,7 @@ static void gent_bitnopaquefields(void)
             if ((space = H5Screate_simple(1, &nelmts, NULL)) >= 0) {
                 if ((dset = H5Dcreate2(grp, "bitfield_2", type, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) >= 0) {
                     for (i = 0; i < nelmts; i++) {
-                        buf2[i] = (uint16_t)(0xffff ^ (i * 16));
+                        ASSIGN_TO_SMALLER_SIZE(buf2[i], uint16_t, 0xffff ^ (i * 16), size_t);
                     }
                     H5Dwrite(dset, type, H5S_ALL, H5S_ALL, H5P_DEFAULT, buf2);
                     H5Dclose(dset);
@@ -9879,7 +9879,7 @@ static void gent_bitnopaquefields(void)
                 if ((space = H5Screate_simple(1, &nelmts, NULL)) >= 0) {
                     if ((dset = H5Dcreate2(grp, "opaque_1", type, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) >= 0) {
                         for(i = 0; i < nelmts; i++)
-                            buf[i] = (uint8_t)(0xff ^ i);
+                            ASSIGN_TO_SMALLER_SIZE(buf[i], uint8_t, 0xff ^ i, size_t);
                         H5Dwrite(dset, type, H5S_ALL, H5S_ALL, H5P_DEFAULT, buf);
                         H5Dclose(dset);
                     }
@@ -9895,7 +9895,7 @@ static void gent_bitnopaquefields(void)
                 if ((space = H5Screate_simple(1, &nelmts, NULL)) >= 0) {
                     if ((dset = H5Dcreate2(grp, "opaque_2", type, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) >= 0) {
                         for(i = 0; i < nelmts; i++)
-                            buf2[i] = (uint16_t)(0xffff ^ (i * 16));
+                            ASSIGN_TO_SMALLER_SIZE(buf2[i], uint16_t, 0xffff ^ (i * 16), size_t);
 
                         H5Dwrite(dset, type, H5S_ALL, H5S_ALL, H5P_DEFAULT, buf2);
                         H5Dclose(dset);
@@ -9918,8 +9918,8 @@ static void gent_bitnopaquefields(void)
             if ((space = H5Screate_simple(1, &nelmts, NULL)) >= 0) {
                 if ((dset = H5Dcreate2(grp, "compound_1", type, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) >= 0) {
                     for(i = 0; i < nelmts; i++) {
-                        buf5[i].a = (uint8_t)(0xff ^ i);
-                        buf5[i].b = (uint16_t)(0xffff ^ (i * 16));
+                        ASSIGN_TO_SMALLER_SIZE(buf5[i].a, uint8_t, 0xff ^ i, size_t);
+                        ASSIGN_TO_SMALLER_SIZE(buf5[i].b, uint16_t, 0xffff ^ (i * 16), size_t);
                         buf5[i].c = (uint32_t)0xffffffff ^ (uint32_t)(i * 32);
                         buf5[i].d = (uint64_t)0xffffffffffffffff ^ (uint64_t)(i * 64);
                     }
diff --git a/tools/test/h5ls/dynlib_ls.c b/tools/test/h5ls/dynlib_ls.c
index 4f2d435..089b78f 100644
--- a/tools/test/h5ls/dynlib_ls.c
+++ b/tools/test/h5ls/dynlib_ls.c
@@ -16,6 +16,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include "H5PLextern.h"
+#include "H5private.h"
 
 #define H5Z_FILTER_DYNLIBUD      300
 #define MULTIPLIER              3
@@ -69,7 +70,7 @@ H5Z_filter_dynlibud(unsigned int flags, size_t cd_nelmts,
         /* Subtract the original value with MULTIPLIER */
         while(buf_left > 0) {
             char temp = *int_ptr;
-            *int_ptr = (char)(temp - MULTIPLIER);
+            ASSIGN_TO_SMALLER_SIZE(*int_ptr, char, temp - MULTIPLIER, int);
             int_ptr++;
             buf_left -= sizeof(*int_ptr);
         } /* end while */
diff --git a/tools/test/h5repack/h5repackgentest.c b/tools/test/h5repack/h5repackgentest.c
index f476a16..f3cb7d9 100644
--- a/tools/test/h5repack/h5repackgentest.c
+++ b/tools/test/h5repack/h5repackgentest.c
@@ -266,7 +266,7 @@ generate_uint8be(hbool_t external) {
     for (i = 0, n = 0; i < dims[0]; i++) {
         for (j = 0; j < dims[1]; j++) {
             for (k = 0; k < dims[2]; k++, n++) {
-                wdata[n] = (uint8_t)(n * ((n & 1) ? (-1) : (1)));
+                ASSIGN_TO_SMALLER_SIZE(wdata[n], uint8_t, n * ((n & 1) ? (-1) : (1)), int);
             }
         }
     }