1 files changed, 122 insertions, 0 deletions
diff --git a/tools/lib/h5tools_utils.c b/tools/lib/h5tools_utils.c
index c8b0644..8a9d806 100644
--- a/tools/lib/h5tools_utils.c
+++ b/tools/lib/h5tools_utils.c
@@ -157,6 +157,128 @@ help_ref_msg(FILE *output)
     HDfprintf(output, "see the <%s> entry in the 'HDF5 Reference Manual'.\n", h5tools_getprogname());
 }
 
+/*-------------------------------------------------------------------------
+ * Function:    parse_hsize_list
+ *
+ * Purpose:     Parse a list of comma or space separated integers and return
+ *              them in a list. The string being passed into this function
+ *              should be at the start of the list you want to parse. You are
+ *              responsible for freeing the array returned from here.
+ *
+ *              Lists in the so-called "terse" syntax are separated by
+ *              semicolons (;). The lists themselves can be separated by
+ *              either commas (,) or white spaces.
+ *
+ * Return:      <none>
+ *-------------------------------------------------------------------------
+ */
+void
+parse_hsize_list(const char *h_list, subset_d *d)
+{
+    hsize_t     *p_list;
+    const char  *ptr;
+    unsigned int size_count = 0;
+    unsigned int i          = 0;
+    unsigned int last_digit = 0;
+
+    if (!h_list || !*h_list || *h_list == ';')
+        return;
+
+    H5TOOLS_START_DEBUG(" - h_list:%s", h_list);
+    /* count how many integers do we have */
+    for (ptr = h_list; ptr && *ptr && *ptr != ';' && *ptr != ']'; ptr++)
+        if (HDisdigit(*ptr)) {
+            if (!last_digit)
+                /* the last read character wasn't a digit */
+                size_count++;
+
+            last_digit = 1;
+        }
+        else
+            last_digit = 0;
+
+    if (size_count == 0) {
+        /* there aren't any integers to read */
+        H5TOOLS_ENDDEBUG("No integers to read");
+        return;
+    }
+    H5TOOLS_DEBUG("Number integers to read=%ld", size_count);
+
+    /* allocate an array for the integers in the list */
+    if ((p_list = (hsize_t *)HDcalloc(size_count, sizeof(hsize_t))) == NULL)
+        H5TOOLS_INFO("Unable to allocate space for subset data");
+
+    for (ptr = h_list; i < size_count && ptr && *ptr && *ptr != ';' && *ptr != ']'; ptr++)
+        if (HDisdigit(*ptr)) {
+            /* we should have an integer now */
+            p_list[i++] = (hsize_t)HDstrtoull(ptr, NULL, 0);
+
+            while (HDisdigit(*ptr))
+                /* scroll to end of integer */
+                ptr++;
+        }
+    d->data = p_list;
+    d->len  = size_count;
+    H5TOOLS_ENDDEBUG(" ");
+}
+
+/*-------------------------------------------------------------------------
+ * Function:    parse_subset_params
+ *
+ * Purpose:     Parse the so-called "terse" syntax for specifying subsetting parameters.
+ *
+ * Return:      Success:    struct subset_t object
+ *              Failure:    NULL
+ *-------------------------------------------------------------------------
+ */
+struct subset_t *
+parse_subset_params(const char *dset)
+{
+    struct subset_t *s = NULL;
+    char            *brace;
+    const char      *q_dset;
+
+    H5TOOLS_START_DEBUG(" - dset:%s", dset);
+    /* if dset name is quoted wait till after second quote to look for subset brackets */
+    if (*dset == '"')
+        q_dset = HDstrchr(dset, '"');
+    else
+        q_dset = dset;
+    if ((brace = HDstrrchr(q_dset, '[')) != NULL) {
+        *brace++ = '\0';
+
+        s = (struct subset_t *)HDcalloc(1, sizeof(struct subset_t));
+        parse_hsize_list(brace, &s->start);
+
+        while (*brace && *brace != ';')
+            brace++;
+
+        if (*brace)
+            brace++;
+
+        parse_hsize_list(brace, &s->stride);
+
+        while (*brace && *brace != ';')
+            brace++;
+
+        if (*brace)
+            brace++;
+
+        parse_hsize_list(brace, &s->count);
+
+        while (*brace && *brace != ';')
+            brace++;
+
+        if (*brace)
+            brace++;
+
+        parse_hsize_list(brace, &s->block);
+    }
+    H5TOOLS_ENDDEBUG(" ");
+
+    return s;
+}
+
 /*****************************************************************************
  *
  * Function: parse_tuple()