use autogen for command line options

libopts/alias.c

@@ -0,0 +1,108 @@
+
+/**
+ * \file alias.c
+ *
+ * Time-stamp:      "2012-02-12 09:41:42 bkorb"
+ *
+ *   Automated Options Paged Usage module.
+ *
+ *  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) 1992-2012 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 md5sums:
+ *
+ *  43b91e8ca915626ed3818ffb1b71248b pkg/libopts/COPYING.gplv3
+ *  06a1a2e4760c90ea5e1dad8dfaac4d39 pkg/libopts/COPYING.lgplv3
+ *  66a5cedaf62c4b2637025f049f9b826f pkg/libopts/COPYING.mbsd
+ */
+
+/*=export_func  optionAlias
+ * private:
+ *
+ * what:  relay an option to its alias
+ * arg:   + tOptions*    + pOpts    + program options descriptor  +
+ * arg:   + tOptDesc*    + pOptDesc + 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 * pOpts, tOptDesc * pOldOD, unsigned int alias)
+{
+    tOptDesc * pOD;
+
+    if (pOpts == OPTPROC_EMIT_USAGE)
+        return 0;
+
+    pOD = pOpts->pOptDesc + alias;
+    if ((unsigned)pOpts->optCt <= alias) {
+        fwrite(zAliasRange, strlen (zAliasRange), 1, stderr);
+        exit(EXIT_FAILURE);
+    }
+
+    /*
+     *  Copy over the option instance flags
+     */
+    pOD->fOptState &= OPTST_PERSISTENT_MASK;
+    pOD->fOptState |= (pOldOD->fOptState & ~OPTST_PERSISTENT_MASK);
+    pOD->optArg.argString = pOldOD->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 (  (pOD->fOptState & OPTST_DEFINED)
+       && (++pOD->optOccCt > pOD->optMaxCt)  )  {
+
+        if ((pOpts->fOptSet & OPTPROC_ERRSTOP) != 0) {
+            char const * pzEqv =
+                (pOD->optEquivIndex != NO_EQUIVALENT) ? zEquiv : zNil;
+
+            fputs(zErrOnly, stderr);
+
+            if (pOD->optMaxCt > 1)
+                fprintf(stderr, zAtMost, pOD->optMaxCt, pOD->pz_Name, pzEqv);
+            else
+                fprintf(stderr, zOnlyOne, pOD->pz_Name, pzEqv);
+        }
+
+        return -1;
+    }
+
+    /*
+     *  Clear the state bits and counters
+     */
+    pOldOD->fOptState &= OPTST_PERSISTENT_MASK;
+    pOldOD->optOccCt   = 0;
+
+    /*
+     *  If there is a procedure to call, call it
+     */
+    if (pOD->pOptProc != NULL)
+        (*pOD->pOptProc)(pOpts, pOD);
+    return 0;
+}
+
+/*
+ * Local Variables:
+ * mode: C
+ * c-file-style: "stroustrup"
+ * indent-tabs-mode: nil
+ * End:
+ * end of autoopts/alias.c */