1 files changed, 47 insertions, 0 deletions
diff --git a/tools/lib/h5tools_utils.h b/tools/lib/h5tools_utils.h
index fed4b52..b54ed85 100644
--- a/tools/lib/h5tools_utils.h
+++ b/tools/lib/h5tools_utils.h
@@ -40,6 +40,53 @@ H5TOOLS_DLLVAR FILE *overflow_file;
 H5TOOLS_DLLVAR hsize_t H5TOOLS_MALLOCSIZE;
 /* size of hyperslab buffer when a dataset is bigger than H5TOOLS_MALLOCSIZE */
 H5TOOLS_DLLVAR hsize_t H5TOOLS_BUFSIZE;
+/*
+ * begin get_option section
+ */
+H5TOOLS_DLLVAR int         opt_err; /* getoption prints errors if this is on    */
+H5TOOLS_DLLVAR int         opt_ind; /* token pointer                            */
+H5TOOLS_DLLVAR const char *opt_arg; /* flag argument (or value)                 */
+
+/*
+ * get_option determines which options are specified on the command line and
+ * returns a pointer to any arguments possibly associated with the option in
+ * the ``opt_arg'' variable. get_option returns the shortname equivalent of
+ * the option. The long options are specified in the following way:
+ *
+ * struct long_options foo[] = {
+ *   { "filename", require_arg, 'f' },
+ *   { "append", no_arg, 'a' },
+ *   { "width", require_arg, 'w' },
+ *   { NULL, 0, 0 }
+ * };
+ *
+ * Long named options can have arguments specified as either:
+ *
+ *   ``--param=arg'' or ``--param arg''
+ *
+ * Short named options can have arguments specified as either:
+ *
+ *   ``-w80'' or ``-w 80''
+ *
+ * and can have more than one short named option specified at one time:
+ *
+ *   -aw80
+ *
+ * in which case those options which expect an argument need to come at the
+ * end.
+ */
+typedef struct long_options {
+    const char *name;     /* name of the long option              */
+    int         has_arg;  /* whether we should look for an arg    */
+    char        shortval; /* the shortname equivalent of long arg
+                           * this gets returned from get_option   */
+} long_options;
+
+H5TOOLS_DLL int get_option(int argc, const char *const *argv, const char *opt,
+                           const struct long_options *l_opt);
+/*
+ * end get_option section
+ */
 
 /*struct taken from the dumper. needed in table struct*/
 typedef struct obj_t {