Update tools hid_t declarations with H5I_INVALID_HID

16 files changed, 124 insertions, 123 deletions

diff --git a/tools/src/h5copy/h5copy.c b/tools/src/h5copy/h5copy.c
index 86bd6f6..e1370e2 100644
--- a/tools/src/h5copy/h5copy.c
+++ b/tools/src/h5copy/h5copy.c
@@ -211,8 +211,8 @@ main (int argc, const char *argv[])
     H5E_auto2_t         tools_func;
     void               *edata;
     void               *tools_edata;
-    hid_t        fid_src = -1;
-    hid_t        fid_dst = -1;
+    hid_t        fid_src = H5I_INVALID_HID;
+    hid_t        fid_dst = H5I_INVALID_HID;
     unsigned     flag = 0;
     unsigned     verbose = 0;
     unsigned     parents = 0;
diff --git a/tools/src/h5diff/ph5diff_main.c b/tools/src/h5diff/ph5diff_main.c
index 380ab3b..5ba5fb3 100644
--- a/tools/src/h5diff/ph5diff_main.c
+++ b/tools/src/h5diff/ph5diff_main.c
@@ -126,7 +126,8 @@ int main(int argc, const char *argv[])
 static void
 ph5diff_worker(int nID)
 {
-    hid_t file1_id = -1, file2_id = -1;
+    hid_t file1_id = H5I_INVALID_HID;
+    hid_t file2_id = H5I_INVALID_HID;
 
     while(1)
     {
diff --git a/tools/src/h5dump/h5dump.c b/tools/src/h5dump/h5dump.c
index 0222c8b..731fcd7 100644
--- a/tools/src/h5dump/h5dump.c
+++ b/tools/src/h5dump/h5dump.c
@@ -1393,8 +1393,8 @@ error:
 int
 main(int argc, const char *argv[])
 {
-    hid_t               fid = -1;
-    hid_t               gid = -1;
+    hid_t               fid = H5I_INVALID_HID;
+    hid_t               gid = H5I_INVALID_HID;
     hid_t               fapl_id = H5P_DEFAULT;
     H5E_auto2_t         func;
     H5E_auto2_t         tools_func;
diff --git a/tools/src/h5dump/h5dump_ddl.c b/tools/src/h5dump/h5dump_ddl.c
index dc4d915..2765990 100644
--- a/tools/src/h5dump/h5dump_ddl.c
+++ b/tools/src/h5dump/h5dump_ddl.c
@@ -614,7 +614,7 @@ dump_named_datatype(hid_t tid, const char *name)
 {
     H5O_info_t        oinfo;
     unsigned          attr_crt_order_flags;
-    hid_t             tcpl_id = -1;    /* datatype creation property list ID */
+    hid_t             tcpl_id = H5I_INVALID_HID;    /* datatype creation property list ID */
     hsize_t           curr_pos = 0;    /* total data element position   */
     h5tools_str_t     buffer;          /* string into which to render   */
     h5tools_context_t ctx;             /* print context  */
@@ -1415,7 +1415,7 @@ lnk_search(const char *path, const H5L_info_t *li, void *_op_data)
 void
 handle_paths(hid_t fid, const char *path_name, void H5_ATTR_UNUSED * data, int H5_ATTR_UNUSED pe, const char H5_ATTR_UNUSED *display_name)
 {
-    hid_t  gid = -1;
+    hid_t  gid = H5I_INVALID_HID;
 
     if((gid = H5Gopen2(fid, "/", H5P_DEFAULT)) < 0) {
         error_msg("unable to open root group\n");
@@ -1469,8 +1469,8 @@ handle_paths(hid_t fid, const char *path_name, void H5_ATTR_UNUSED * data, int H
 void
 handle_attributes(hid_t fid, const char *attr, void H5_ATTR_UNUSED *data, int H5_ATTR_UNUSED pe, const char H5_ATTR_UNUSED *display_name)
 {
-    hid_t  oid          = -1;
-    hid_t  attr_id      = -1;
+    hid_t  oid          = H5I_INVALID_HID;
+    hid_t  attr_id      = H5I_INVALID_HID;
     char *obj_name      = NULL;
     char *attr_name     = NULL;
     int j;
diff --git a/tools/src/h5dump/h5dump_xml.c b/tools/src/h5dump/h5dump_xml.c
index af19c0c..9e949e0 100644
--- a/tools/src/h5dump/h5dump_xml.c
+++ b/tools/src/h5dump/h5dump_xml.c
@@ -1783,9 +1783,9 @@ xml_dump_dataspace(hid_t space)
 void
 xml_dump_data(hid_t obj_id, int obj_data, struct subset_t H5_ATTR_UNUSED *sset, int H5_ATTR_UNUSED pindex)
 {
-    hid_t               space = -1;
-    hid_t               type = -1;
-    hid_t               p_type = -1;
+    hid_t               space = H5I_INVALID_HID;
+    hid_t               type = H5I_INVALID_HID;
+    hid_t               p_type = H5I_INVALID_HID;
     hsize_t             size[64];
     hsize_t             nelmts = 1;
     int                 ndims;
@@ -1950,9 +1950,9 @@ herr_t
 xml_dump_attr(hid_t attr, const char *attr_name, const H5A_info_t H5_ATTR_UNUSED *info,
     void H5_ATTR_UNUSED * op_data)
 {
-    hid_t             attr_id = -1;
-    hid_t             type = -1;
-    hid_t             space = -1;
+    hid_t             attr_id = H5I_INVALID_HID;
+    hid_t             type = H5I_INVALID_HID;
+    hid_t             space = H5I_INVALID_HID;
     H5S_class_t       space_type;
     hsize_t           curr_pos = 0;        /* total data element position   */
     h5tools_str_t     buffer;              /* string into which to render   */
@@ -2787,8 +2787,8 @@ static int
 xml_print_refs(hid_t did, int source)
 {
     herr_t            e;
-    hid_t             type    = -1;
-    hid_t             space   = -1;
+    hid_t             type    = H5I_INVALID_HID;
+    hid_t             space   = H5I_INVALID_HID;
     hssize_t          ssiz    = -1;
     hsize_t           i;
     size_t            tsiz;
@@ -2936,8 +2936,8 @@ static int
 xml_print_strs(hid_t did, int source)
 {
     herr_t            e;
-    hid_t             type    = -1;
-    hid_t             space   = -1;
+    hid_t             type    = H5I_INVALID_HID;
+    hid_t             space   = H5I_INVALID_HID;
     hssize_t          ssiz    = -1;
     htri_t            is_vlstr = FALSE;
     size_t            tsiz    = 0;
@@ -4121,7 +4121,7 @@ xml_print_enum(hid_t type)
     unsigned char      *value = NULL;   /*value array                    */
     unsigned            nmembs;         /*number of members              */
     hid_t               super;          /*enum base integer type         */
-    hid_t               native = -1;    /*native integer datatype        */
+    hid_t               native = H5I_INVALID_HID;    /*native integer datatype        */
     size_t              dst_size;       /*destination value type size    */
     unsigned            i;              /*miscellaneous counters         */
     size_t              j;
diff --git a/tools/src/h5format_convert/h5format_convert.c b/tools/src/h5format_convert/h5format_convert.c
index 257a047..f5234f4 100644
--- a/tools/src/h5format_convert/h5format_convert.c
+++ b/tools/src/h5format_convert/h5format_convert.c
@@ -219,8 +219,8 @@ leave(int ret)
 static int
 convert(hid_t fid, const char *dname)
 {
-    hid_t dcpl = -1;
-    hid_t did = -1;
+    hid_t dcpl = H5I_INVALID_HID;
+    hid_t did = H5I_INVALID_HID;
     H5D_layout_t layout_type;
     H5D_chunk_index_t idx_type;
 
@@ -399,7 +399,7 @@ main(int argc, const char *argv[])
 {
     H5E_auto2_t func;
     void *edata;
-    hid_t fid = -1;
+    hid_t fid = H5I_INVALID_HID;
 
     h5tools_setprogname(PROGRAMNAME);
     h5tools_setstatus(EXIT_SUCCESS);
diff --git a/tools/src/h5import/h5import.c b/tools/src/h5import/h5import.c
index bd1689f..81f9a32 100644
--- a/tools/src/h5import/h5import.c
+++ b/tools/src/h5import/h5import.c
@@ -1086,12 +1086,12 @@ out:
  */
 static int processStrHDFData(FILE *strm, struct Input *in, hid_t file_id)
 {
-    hid_t   group_id    = -1;
-    hid_t   dset_id     = -1;
-    hid_t   space_id    = -1;
-    hid_t   mspace_id   = -1;
-    hid_t   type_id     = -1;
-    hid_t   handle      = -1;
+    hid_t   group_id    = H5I_INVALID_HID;
+    hid_t   dset_id     = H5I_INVALID_HID;
+    hid_t   space_id    = H5I_INVALID_HID;
+    hid_t   mspace_id   = H5I_INVALID_HID;
+    hid_t   type_id     = H5I_INVALID_HID;
+    hid_t   handle      = H5I_INVALID_HID;
     char   *str1        = NULL;
     char   *str2        = NULL;
     char   *str3        = NULL;
diff --git a/tools/src/h5jam/h5jam.c b/tools/src/h5jam/h5jam.c
index 8222e06..07797c8 100644
--- a/tools/src/h5jam/h5jam.c
+++ b/tools/src/h5jam/h5jam.c
@@ -197,8 +197,8 @@ main (int argc, const char *argv[])
     int         ofid = -1;
     void       *edata;
     H5E_auto2_t func;
-    hid_t       ifile = -1;
-    hid_t       plist = -1;
+    hid_t       ifile = H5I_INVALID_HID;
+    hid_t       plist = H5I_INVALID_HID;
     herr_t      status;
     htri_t      testval;
     hsize_t     usize;
diff --git a/tools/src/h5jam/h5unjam.c b/tools/src/h5jam/h5unjam.c
index aa893f9..203522b 100644
--- a/tools/src/h5jam/h5unjam.c
+++ b/tools/src/h5jam/h5unjam.c
@@ -199,8 +199,8 @@ main(int argc, const char *argv[])
 {
     void               *edata;
     H5E_auto2_t         func;
-    hid_t               ifile = -1;
-    hid_t               plist = -1;
+    hid_t               ifile = H5I_INVALID_HID;
+    hid_t               plist = H5I_INVALID_HID;
     off_t               fsize;
     hsize_t             usize;
     htri_t              testval;
diff --git a/tools/src/h5ls/h5ls.c b/tools/src/h5ls/h5ls.c
index 289d44c..1a49f40 100644
--- a/tools/src/h5ls/h5ls.c
+++ b/tools/src/h5ls/h5ls.c
@@ -881,7 +881,7 @@ print_enum_type(h5tools_str_t *buffer, hid_t type, int ind)
     if (nmembs > 0) {
         char        **name;         /* member names */
         unsigned char *value;       /* value array */
-        hid_t       native = -1;    /* native integer data type */
+        hid_t       native = H5I_INVALID_HID;    /* native integer data type */
         size_t      dst_size;       /* destination value type size */
         unsigned    i;              /* miscellaneous counters */
 
@@ -2826,7 +2826,7 @@ leave(int ret)
 int
 main(int argc, const char *argv[])
 {
-    hid_t       file = H5I_INVALID_HID;
+    hid_t       file_id = H5I_INVALID_HID;
     char       *fname = NULL, *oname = NULL, *x;
     const char *s = NULL;
     char       *rest;
@@ -3316,17 +3316,17 @@ main(int argc, const char *argv[])
 
         fname = HDstrdup(argv[argno++]);
         oname = NULL;
-        file = -1;
+        file_id = H5I_INVALID_HID;
 
         while (fname && *fname) {
             if (fapl_id != H5P_DEFAULT) {
-                file = H5Fopen(fname, H5F_ACC_RDONLY, fapl_id);
+                file_id = H5Fopen(fname, H5F_ACC_RDONLY, fapl_id);
             }
             else {
-                file = h5tools_fopen(fname, H5F_ACC_RDONLY, H5P_DEFAULT, preferred_driver, drivername, sizeof drivername);
+                file_id = h5tools_fopen(fname, H5F_ACC_RDONLY, H5P_DEFAULT, preferred_driver, drivername, sizeof drivername);
             }
 
-            if (file >= 0) {
+            if (file_id >= 0) {
                 if (verbose_g)
                     PRINTSTREAM(rawoutstream, "Opened \"%s\" with %s driver.\n", fname, drivername);
                 break; /*success*/
@@ -3342,7 +3342,7 @@ main(int argc, const char *argv[])
             *oname = '\0';
         } /* end while */
 
-        if (file < 0) {
+        if (file_id < 0) {
             HDfprintf(rawerrorstream, "%s: unable to open file\n", argv[argno-1]);
             HDfree(fname);
             err_exit = 1;
@@ -3377,8 +3377,8 @@ main(int argc, const char *argv[])
 
         /* Remember the file information for later */
         iter.fname = fname;
-        iter.fid = file;
-        iter.gid = -1;
+        iter.fid = file_id;
+        iter.gid = H5I_INVALID_HID;
         iter.symlink_target = FALSE;
         iter.symlink_list = &symlink_list;
         iter.symlink_list->dangle_link = FALSE;
@@ -3390,7 +3390,7 @@ main(int argc, const char *argv[])
         /* Check for root group as object name */
         if (HDstrcmp(oname, root_name)) {
             /* Check the type of link given */
-            if (H5Lget_info(file, oname, &li, H5P_DEFAULT) < 0) {
+            if (H5Lget_info(file_id, oname, &li, H5P_DEFAULT) < 0) {
                 hsize_t             curr_pos = 0;        /* total data element position   */
                 h5tools_str_t       buffer;          /* string into which to render   */
                 h5tools_context_t   ctx;             /* print context  */
@@ -3417,22 +3417,22 @@ main(int argc, const char *argv[])
             }
             /* Open the object and display it's information */
             if (li.type == H5L_TYPE_HARD) {
-                if (visit_obj(file, oname, &iter) < 0) {
+                if (visit_obj(file_id, oname, &iter) < 0) {
                     H5Eset_auto2(H5E_DEFAULT, func, edata);
                     leave(EXIT_FAILURE);
                 }
             } /* end if(li.type == H5L_TYPE_HARD) */
             else {
                 /* Specified name is not for object -- list that link */
-                /* Use file ID for root group ID */
-                iter.gid = file;
+                /* Use file_id ID for root group ID */
+                iter.gid = file_id;
                 list_lnk(oname, &li, &iter);
             }
 #if 1
             H5_nanosleep(poll_nanosecs);
 #endif
         }
-        H5Fclose(file);
+        H5Fclose(file_id);
         HDfree(fname);
         if (x)
             HDfree(oname);
diff --git a/tools/src/h5repack/h5repack.c b/tools/src/h5repack/h5repack.c
index 6f0e4eb..b138896 100644
--- a/tools/src/h5repack/h5repack.c
+++ b/tools/src/h5repack/h5repack.c
@@ -250,7 +250,7 @@ copy_named_datatype(hid_t type_in, hid_t fidout, named_dt_t **named_dt_head_p, t
 
                 /* Update the address and id */
                 dt->addr_in = travt->objs[i].objno;
-                dt->id_out = -1;
+                dt->id_out = H5I_INVALID_HID;
 
                 /* Check if this type is the one requested */
                 if (oinfo.addr == dt->addr_in) {
@@ -272,7 +272,7 @@ copy_named_datatype(hid_t type_in, hid_t fidout, named_dt_t **named_dt_head_p, t
 
         /* Update the address and id */
         dt_ret->addr_in = oinfo.addr;
-        dt_ret->id_out = -1;
+        dt_ret->id_out = H5I_INVALID_HID;
     } /* end if requested datatype not found */
 
     /* If the requested datatype does not yet exist in the output file, copy it
@@ -343,11 +343,11 @@ done:
 int
 copy_attr(hid_t loc_in, hid_t loc_out, named_dt_t **named_dt_head_p, trav_table_t *travt, pack_opt_t *options)
 {
-    hid_t       attr_id = -1;  /* attr ID */
-    hid_t       attr_out = -1; /* attr ID */
-    hid_t       space_id = -1; /* space ID */
-    hid_t       ftype_id = -1; /* file type ID */
-    hid_t       wtype_id = -1; /* read/write type ID */
+    hid_t       attr_id = H5I_INVALID_HID;  /* attr ID */
+    hid_t       attr_out = H5I_INVALID_HID; /* attr ID */
+    hid_t       space_id = H5I_INVALID_HID; /* space ID */
+    hid_t       ftype_id = H5I_INVALID_HID; /* file type ID */
+    hid_t       wtype_id = H5I_INVALID_HID; /* read/write type ID */
     size_t      msize;         /* size of type */
     void       *buf = NULL;    /* data buffer */
     hsize_t     nelmts;        /* number of elements in dataset */
@@ -385,7 +385,7 @@ copy_attr(hid_t loc_in, hid_t loc_out, named_dt_t **named_dt_head_p, trav_table_
         if ((is_named = H5Tcommitted(ftype_id)) < 0)
             H5TOOLS_GOTO_ERROR((-1), "H5Tcommitted failed");
         if (is_named && travt) {
-            hid_t fidout = -1;
+            hid_t fidout = H5I_INVALID_HID;
 
             /* Create out file id */
             if ((fidout = H5Iget_file_id(loc_out)) < 0)
@@ -432,7 +432,7 @@ copy_attr(hid_t loc_in, hid_t loc_out, named_dt_t **named_dt_head_p, trav_table_
         type_class = H5Tget_class(wtype_id);
         is_ref = (type_class == H5T_REFERENCE);
         if (type_class == H5T_VLEN || type_class == H5T_ARRAY) {
-            hid_t base_type = -1;
+            hid_t base_type = H5I_INVALID_HID;
 
             base_type = H5Tget_super(ftype_id);
             is_ref = (is_ref || (H5Tget_class(base_type) == H5T_REFERENCE));
@@ -500,16 +500,16 @@ copy_attr(hid_t loc_in, hid_t loc_out, named_dt_t **named_dt_head_p, trav_table_
          */
         if (H5Sclose(space_id) < 0)
             H5TOOLS_GOTO_ERROR((-1), "H5Sclose failed");
-        space_id = -1;
+        space_id = H5I_INVALID_HID;
         if (H5Tclose(wtype_id) < 0)
             H5TOOLS_GOTO_ERROR((-1), "H5Tclose failed");
-        wtype_id = -1;
+        wtype_id = H5I_INVALID_HID;
         if (H5Tclose(ftype_id) < 0)
             H5TOOLS_GOTO_ERROR((-1), "H5Tclose failed");
-        ftype_id = -1;
+        ftype_id = H5I_INVALID_HID;
         if (H5Aclose(attr_id) < 0)
             H5TOOLS_GOTO_ERROR((-1), "H5Aclose failed");
-        attr_id = -1;
+        attr_id = H5I_INVALID_HID;
     } /* for u (each attribute) */
 
 done:
@@ -725,9 +725,9 @@ done:
 static int
 check_objects(const char* fname, pack_opt_t *options)
 {
-    hid_t         fid = -1;
-    hid_t         did = -1;
-    hid_t         sid = -1;
+    hid_t         fid = H5I_INVALID_HID;
+    hid_t         did = H5I_INVALID_HID;
+    hid_t         sid = H5I_INVALID_HID;
     unsigned int  i;
     int           ifil;
     trav_table_t *travt = NULL;
diff --git a/tools/src/h5repack/h5repack_copy.c b/tools/src/h5repack/h5repack_copy.c
index 613606f..7336125 100644
--- a/tools/src/h5repack/h5repack_copy.c
+++ b/tools/src/h5repack/h5repack_copy.c
@@ -61,11 +61,11 @@ static void print_user_block(const char *filename, hid_t fid);
 int
 copy_objects(const char* fnamein, const char* fnameout, pack_opt_t *options)
 {
-    hid_t         fidin = -1;
-    hid_t         fidout = -1;
-    hid_t         fcpl_in = -1;  /* file creation property list ID for input file */
-    hid_t         grp_in = -1;   /* group ID */
-    hid_t         gcpl_in = -1;  /* group creation property list */
+    hid_t         fidin = H5I_INVALID_HID;
+    hid_t         fidout = H5I_INVALID_HID;
+    hid_t         fcpl_in = H5I_INVALID_HID;  /* file creation property list ID for input file */
+    hid_t         grp_in = H5I_INVALID_HID;   /* group ID */
+    hid_t         gcpl_in = H5I_INVALID_HID;  /* group creation property list */
     hid_t         fcpl = H5P_DEFAULT;     /* file creation property list ID */
     hid_t         fapl = H5P_DEFAULT;     /* file access property list ID */
     trav_table_t *travt = NULL;
@@ -580,19 +580,19 @@ int
 do_copy_objects(hid_t fidin, hid_t fidout, trav_table_t *travt,
         pack_opt_t *options) /* repack options */
 {
-    hid_t grp_in = -1;   /* group ID */
-    hid_t grp_out = -1;  /* group ID */
-    hid_t dset_in = -1;  /* read dataset ID */
-    hid_t dset_out = -1; /* write dataset ID */
-    hid_t gcpl_in = -1;  /* group creation property list */
-    hid_t gcpl_out = -1; /* group creation property list */
-    hid_t type_in = -1;  /* named type ID */
-    hid_t type_out = -1; /* named type ID */
-    hid_t dcpl_in = -1;  /* dataset creation property list ID */
-    hid_t dcpl_out = -1; /* dataset creation property list ID */
-    hid_t f_space_id = -1; /* file space ID */
-    hid_t ftype_id = -1; /* file type ID */
-    hid_t wtype_id = -1; /* read/write type ID */
+    hid_t grp_in = H5I_INVALID_HID;   /* group ID */
+    hid_t grp_out = H5I_INVALID_HID;  /* group ID */
+    hid_t dset_in = H5I_INVALID_HID;  /* read dataset ID */
+    hid_t dset_out = H5I_INVALID_HID; /* write dataset ID */
+    hid_t gcpl_in = H5I_INVALID_HID;  /* group creation property list */
+    hid_t gcpl_out = H5I_INVALID_HID; /* group creation property list */
+    hid_t type_in = H5I_INVALID_HID;  /* named type ID */
+    hid_t type_out = H5I_INVALID_HID; /* named type ID */
+    hid_t dcpl_in = H5I_INVALID_HID;  /* dataset creation property list ID */
+    hid_t dcpl_out = H5I_INVALID_HID; /* dataset creation property list ID */
+    hid_t f_space_id = H5I_INVALID_HID; /* file space ID */
+    hid_t ftype_id = H5I_INVALID_HID; /* file type ID */
+    hid_t wtype_id = H5I_INVALID_HID; /* read/write type ID */
     named_dt_t *named_dt_head = NULL; /* Pointer to the stack of named datatypes copied */
     size_t msize;        /* size of type */
     hsize_t nelmts;      /* number of elements in dataset */
@@ -946,7 +946,7 @@ do_copy_objects(hid_t fidin, hid_t fidout, trav_table_t *travt,
                                     hsize_t zero[8]; /*vector of zeros */
                                     int k;
                                     H5D_layout_t dset_layout;
-                                    hid_t dcpl_tmp = -1; /* dataset creation property list ID */
+                                    hid_t dcpl_tmp = H5I_INVALID_HID; /* dataset creation property list ID */
 
                                     /* check if we have VL data in the dataset's datatype */
                                     if (H5Tdetect_class(wtype_id, H5T_VLEN) == TRUE)
@@ -1095,7 +1095,7 @@ do_copy_objects(hid_t fidin, hid_t fidout, trav_table_t *travt,
                  *-------------------------------------------------------------------------
                  */
                 else {
-                    hid_t pid = -1;
+                    hid_t pid = H5I_INVALID_HID;
 
                     /* create property to pass copy options */
                     if ((pid = H5Pcreate(H5P_OBJECT_COPY)) < 0)
@@ -1167,7 +1167,7 @@ do_copy_objects(hid_t fidin, hid_t fidout, trav_table_t *travt,
                     H5TOOLS_GOTO_ERROR((-1), "H5Tclose failed");
                 if (H5Tclose(type_out) < 0)
                     H5TOOLS_GOTO_ERROR((-1), "H5Tclose failed");
-                type_out = -1; /* named datatypes stack, named_dt_head, manages allocation */
+                type_out = H5I_INVALID_HID; /* named datatypes stack, named_dt_head, manages allocation */
 
                 break;
 
@@ -1429,7 +1429,7 @@ print_user_block(const char *filename, hid_t fid)
     int     fh = -1;   /* file handle */
     hsize_t ub_size;   /* user block size */
     hsize_t size;      /* size read */
-    hid_t   fcpl = -1; /* file creation property list ID for HDF5 file */
+    hid_t   fcpl = H5I_INVALID_HID; /* file creation property list ID for HDF5 file */
     int     i;
     int     ret_value = 0;
 
diff --git a/tools/src/h5repack/h5repack_refs.c b/tools/src/h5repack/h5repack_refs.c
index a7fbd3a..70204c8 100644
--- a/tools/src/h5repack/h5repack_refs.c
+++ b/tools/src/h5repack/h5repack_refs.c
@@ -42,15 +42,15 @@ int do_copy_refobjs(hid_t fidin,
                     trav_table_t *travt,
                     pack_opt_t *options) /* repack options */
 {
-    hid_t     grp_in = -1;            /* read group ID */
-    hid_t     grp_out = -1;           /* write group ID */
-    hid_t     dset_in = -1;           /* read dataset ID */
-    hid_t     dset_out = -1;          /* write dataset ID */
-    hid_t     type_in = -1;           /* named type ID */
-    hid_t     dcpl_id = -1;           /* dataset creation property list ID */
-    hid_t     space_id = -1;          /* space ID */
-    hid_t     ftype_id = -1;          /* file data type ID */
-    hid_t     mtype_id = -1;          /* memory data type ID */
+    hid_t     grp_in = H5I_INVALID_HID;            /* read group ID */
+    hid_t     grp_out = H5I_INVALID_HID;           /* write group ID */
+    hid_t     dset_in = H5I_INVALID_HID;           /* read dataset ID */
+    hid_t     dset_out = H5I_INVALID_HID;          /* write dataset ID */
+    hid_t     type_in = H5I_INVALID_HID;           /* named type ID */
+    hid_t     dcpl_id = H5I_INVALID_HID;           /* dataset creation property list ID */
+    hid_t     space_id = H5I_INVALID_HID;          /* space ID */
+    hid_t     ftype_id = H5I_INVALID_HID;          /* file data type ID */
+    hid_t     mtype_id = H5I_INVALID_HID;          /* memory data type ID */
     size_t    msize;                  /* memory size of memory type */
     hsize_t   nelmts;                 /* number of elements in dataset */
     int       rank;                   /* rank of dataset */
@@ -145,7 +145,7 @@ int do_copy_refobjs(hid_t fidin,
                      *-------------------------------------------------------------------------
                      */
                     if(H5Tequal(mtype_id, H5T_STD_REF_OBJ)) {
-                        hid_t            refobj_id = -1;
+                        hid_t            refobj_id = H5I_INVALID_HID;
                         hobj_ref_t       *refbuf = NULL; /* buffer for object references */
                         hobj_ref_t       *buf = NULL;
                         const char*      refname;
@@ -221,7 +221,7 @@ int do_copy_refobjs(hid_t fidin,
                      *-------------------------------------------------------------------------
                      */
                     else if(H5Tequal(mtype_id, H5T_STD_REF_DSETREG)) {
-                        hid_t            refobj_id = -1;
+                        hid_t            refobj_id = H5I_INVALID_HID;
                         hdset_reg_ref_t  *refbuf = NULL; /* input buffer for region references */
                         hdset_reg_ref_t  *buf = NULL;    /* output buffer */
                         const char*      refname;
@@ -260,7 +260,7 @@ int do_copy_refobjs(hid_t fidin,
                                  * in the second traversal of the file
                                  */
                                 if((refname = MapIdToName(refobj_id, travt)) != NULL) {
-                                    hid_t region_id = -1;    /* region id of the referenced dataset */
+                                    hid_t region_id = H5I_INVALID_HID;    /* region id of the referenced dataset */
 
                                     if((region_id = H5Rget_region(dset_in, H5R_DATASET_REGION, &buf[u])) < 0)
                                         H5TOOLS_GOTO_ERROR((-1), "H5Rget_region failed");
@@ -430,11 +430,11 @@ static int copy_refs_attr(hid_t loc_in,
                           trav_table_t *travt,
                           hid_t fidout)         /* for saving references */
 {
-    hid_t       attr_id = -1;      /* attr ID */
-    hid_t       attr_out = -1;     /* attr ID */
-    hid_t       space_id = -1;     /* space ID */
-    hid_t       ftype_id = -1;     /* file data type ID */
-    hid_t       mtype_id = -1;     /* memory data type ID */
+    hid_t       attr_id = H5I_INVALID_HID;      /* attr ID */
+    hid_t       attr_out = H5I_INVALID_HID;     /* attr ID */
+    hid_t       space_id = H5I_INVALID_HID;     /* space ID */
+    hid_t       ftype_id = H5I_INVALID_HID;     /* file data type ID */
+    hid_t       mtype_id = H5I_INVALID_HID;     /* memory data type ID */
     size_t      msize;             /* memory size of type */
     hsize_t     nelmts;            /* number of elements in dataset */
     hsize_t     dims[H5S_MAX_RANK];/* dimensions of dataset */
@@ -823,8 +823,8 @@ static herr_t update_ref_value(hid_t obj_id, H5R_type_t ref_type, void *ref_in,
         hid_t fid_out, void *ref_out, trav_table_t *travt)
 {
     const char *ref_obj_name;
-    hid_t       space_id = -1;
-    hid_t       ref_obj_id = -1;
+    hid_t       space_id = H5I_INVALID_HID;
+    hid_t       ref_obj_id = H5I_INVALID_HID;
     herr_t      ret_value = SUCCEED;
 
     ref_obj_id = H5Rdereference2(obj_id, H5P_DEFAULT, ref_type, ref_in);
diff --git a/tools/src/h5repack/h5repack_verify.c b/tools/src/h5repack/h5repack_verify.c
index d84766a..84cbf60 100644
--- a/tools/src/h5repack/h5repack_verify.c
+++ b/tools/src/h5repack/h5repack_verify.c
@@ -39,17 +39,17 @@ static int verify_filters(hid_t pid, hid_t tid, int nfilters, filter_info_t *fil
 int
 h5repack_verify(const char *in_fname, const char *out_fname, pack_opt_t *options)
 {
-    hid_t        fidin      = -1;   /* file ID for input file*/
-    hid_t        fidout     = -1;   /* file ID for output file*/
-    hid_t        did        = -1;   /* dataset ID */
-    hid_t        pid        = -1;   /* dataset creation property list ID */
-    hid_t        sid        = -1;   /* space ID */
-    hid_t        tid        = -1;   /* type ID */
+    hid_t        fidin      = H5I_INVALID_HID;   /* file ID for input file*/
+    hid_t        fidout     = H5I_INVALID_HID;   /* file ID for output file*/
+    hid_t        did        = H5I_INVALID_HID;   /* dataset ID */
+    hid_t        pid        = H5I_INVALID_HID;   /* dataset creation property list ID */
+    hid_t        sid        = H5I_INVALID_HID;   /* space ID */
+    hid_t        tid        = H5I_INVALID_HID;   /* type ID */
     int          ok         = 1;    /* step results */
     unsigned int i;
     trav_table_t *travt = NULL;
-    hid_t        fcpl_in     = -1;   /* file creation property for input file */
-    hid_t        fcpl_out    = -1;   /* file creation property for output file */
+    hid_t        fcpl_in     = H5I_INVALID_HID;   /* file creation property for input file */
+    hid_t        fcpl_out    = H5I_INVALID_HID;   /* file creation property for output file */
     H5F_fspace_strategy_t in_strategy, out_strategy;    /* file space handling strategy for in/output file */
     hbool_t      in_persist, out_persist;         /* free-space persist status for in/output file */
     hsize_t      in_threshold, out_threshold;     /* free-space section threshold for in/output file */
@@ -355,14 +355,14 @@ int verify_layout(hid_t pid, pack_info_t *obj)
 
 int h5repack_cmp_pl(const char *fname1, const char *fname2)
 {
-    hid_t         fid1 =-1;         /* file ID */
-    hid_t         fid2 =-1;         /* file ID */
-    hid_t         dset1 =-1;        /* dataset ID */
-    hid_t         dset2 =-1;        /* dataset ID */
-    hid_t         gid =-1;          /* group ID */
-    hid_t         dcpl1 =-1;        /* dataset creation property list ID */
-    hid_t         dcpl2 =-1;        /* dataset creation property list ID */
-    hid_t         gcplid =-1;       /* group creation property list */
+    hid_t         fid1 =H5I_INVALID_HID;         /* file ID */
+    hid_t         fid2 =H5I_INVALID_HID;         /* file ID */
+    hid_t         dset1 =H5I_INVALID_HID;        /* dataset ID */
+    hid_t         dset2 =H5I_INVALID_HID;        /* dataset ID */
+    hid_t         gid =H5I_INVALID_HID;          /* group ID */
+    hid_t         dcpl1 =H5I_INVALID_HID;        /* dataset creation property list ID */
+    hid_t         dcpl2 =H5I_INVALID_HID;        /* dataset creation property list ID */
+    hid_t         gcplid =H5I_INVALID_HID;       /* group creation property list */
     unsigned      crt_order_flag1;  /* group creation order flag */
     unsigned      crt_order_flag2;  /* group creation order flag */
     trav_table_t *trav = NULL;
diff --git a/tools/src/h5stat/h5stat.c b/tools/src/h5stat/h5stat.c
index 9ce7327..f160671 100644
--- a/tools/src/h5stat/h5stat.c
+++ b/tools/src/h5stat/h5stat.c
@@ -1853,7 +1853,7 @@ main(int argc, const char *argv[])
 {
     iter_t              iter;
     const char         *fname = NULL;
-    hid_t               fid = -1;
+    hid_t               fid = H5I_INVALID_HID;
     H5E_auto2_t         func;
     H5E_auto2_t         tools_func;
     void               *edata;
diff --git a/tools/src/misc/h5clear.c b/tools/src/misc/h5clear.c
index ae57031..927167b 100644
--- a/tools/src/misc/h5clear.c
+++ b/tools/src/misc/h5clear.c
@@ -252,8 +252,8 @@ int
 main (int argc, const char *argv[])
 {
     char *fname = NULL;             /* File name */
-    hid_t fapl = -1;                /* File access property list */
-    hid_t fid = -1;                 /* File ID */
+    hid_t fapl = H5I_INVALID_HID;                /* File access property list */
+    hid_t fid = H5I_INVALID_HID;                 /* File ID */
     haddr_t image_addr;
     hsize_t image_len;
     unsigned flags = H5F_ACC_RDWR;    /* file access flags */