1 files changed, 116 insertions, 0 deletions
diff --git a/sntp/libopts/alias.c b/sntp/libopts/alias.c
new file mode 100644
index 0000000..be8c6c6
--- /dev/null
+++ b/sntp/libopts/alias.c
@@ -0,0 +1,116 @@
+
+/**
+ * \file alias.c
+ *
+ * Handle options that are aliases for another option.
+ *
+ * @addtogroup autoopts
+ * @{
+ */
+/*
+ *  This routine will forward an option alias to the correct option code.
+ *
+ *  This file is part of AutoOpts, a companion to AutoGen.
+ *  AutoOpts is free software.
+ *  AutoOpts is Copyright (C) 1992-2014 by Bruce Korb - all rights reserved
+ *
+ *  AutoOpts is available under any one of two licenses.  The license
+ *  in use must be one of these two and the choice is under the control
+ *  of the user of the license.
+ *
+ *   The GNU Lesser General Public License, version 3 or later
+ *      See the files "COPYING.lgplv3" and "COPYING.gplv3"
+ *
+ *   The Modified Berkeley Software Distribution License
+ *      See the file "COPYING.mbsd"
+ *
+ *  These files have the following sha256 sums:
+ *
+ *  8584710e9b04216a394078dc156b781d0b47e1729104d666658aecef8ee32e95  COPYING.gplv3
+ *  4379e7444a0e2ce2b12dd6f5a52a27a4d02d39d247901d3285c88cf0d37f477b  COPYING.lgplv3
+ *  13aa749a5b0a454917a944ed8fffc530b784f5ead522b1aacaf4ec8aa55a6239  COPYING.mbsd
+ */
+
+LOCAL tSuccess
+too_many_occurrences(tOptions * opts, tOptDesc * od)
+{
+    if ((opts->fOptSet & OPTPROC_ERRSTOP) != 0) {
+        char const * eqv = (od->optEquivIndex != NO_EQUIVALENT) ? zequiv : zNil;
+
+        fprintf(stderr, ztoo_often_fmt, opts->pzProgName);
+
+        if (od->optMaxCt > 1)
+            fprintf(stderr, zat_most, od->optMaxCt, od->pz_Name, eqv);
+        else
+            fprintf(stderr, zonly_one, od->pz_Name, eqv);
+        (*opts->pUsageProc)(opts, EXIT_FAILURE);
+        /* NOTREACHED */
+    }
+
+    return FAILURE;
+}
+
+/*=export_func  optionAlias
+ * private:
+ *
+ * what:  relay an option to its alias
+ * arg:   + tOptions *   + opts   + program options descriptor  +
+ * arg:   + tOptDesc *   + old_od + the descriptor for this arg +
+ * arg:   + unsigned int + alias  + the aliased-to option index +
+ * ret-type: int
+ *
+ * doc:
+ *  Handle one option as if it had been specified as another.  Exactly.
+ *  Returns "-1" if the aliased-to option has appeared too many times.
+=*/
+int
+optionAlias(tOptions * opts, tOptDesc * old_od, unsigned int alias)
+{
+    tOptDesc * new_od;
+
+    if (opts <= OPTPROC_EMIT_LIMIT)
+        return 0;
+
+    new_od = opts->pOptDesc + alias;
+    if ((unsigned)opts->optCt <= alias) {
+        fputs(zbad_alias_id, stderr);
+        option_exits(EXIT_FAILURE);
+    }
+
+    /*
+     *  Copy over the option instance flags
+     */
+    new_od->fOptState &= OPTST_PERSISTENT_MASK;
+    new_od->fOptState |= (old_od->fOptState & ~OPTST_PERSISTENT_MASK);
+    new_od->optArg.argString = old_od->optArg.argString;
+
+    /*
+     *  Keep track of count only for DEFINED (command line) options.
+     *  IF we have too many, build up an error message and bail.
+     */
+    if (  (new_od->fOptState & OPTST_DEFINED)
+       && (++new_od->optOccCt > new_od->optMaxCt)  )
+        return too_many_occurrences(opts, new_od);
+
+    /*
+     *  Clear the state bits and counters
+     */
+    old_od->fOptState &= OPTST_PERSISTENT_MASK;
+    old_od->optOccCt   = 0;
+
+    /*
+     *  If there is a procedure to call, call it
+     */
+    if (new_od->pOptProc != NULL)
+        (*new_od->pOptProc)(opts, new_od);
+    return 0;
+}
+
+/** @}
+ *
+ * Local Variables:
+ * mode: C
+ * c-file-style: "stroustrup"
+ * indent-tabs-mode: nil
+ * End:
+ * end of autoopts/alias.c */