use autogen for command line options

libopts/time.c

@@ -0,0 +1,137 @@
+
+/**
+ * \file time.c
+ *
+ *  Time-stamp:      "2012-01-29 12:52:31 bkorb"
+ *
+ *  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  optionTimeVal
+ * private:
+ *
+ * what:  process an option with a time duration.
+ * arg:   + tOptions* + pOpts    + program options descriptor +
+ * arg:   + tOptDesc* + pOptDesc + the descriptor for this arg +
+ *
+ * doc:
+ *  Decipher a time duration value.
+=*/
+void
+optionTimeVal(tOptions * pOpts, tOptDesc * pOD)
+{
+    time_t val;
+
+    if ((pOD->fOptState & OPTST_RESET) != 0)
+        return;
+
+    val = parse_duration(pOD->optArg.argString);
+    if (val == BAD_TIME) {
+        fprintf(stderr, zNotDuration, pOpts->pzProgName, pOD->optArg.argString);
+        if ((pOpts->fOptSet & OPTPROC_ERRSTOP) != 0)
+            (*(pOpts->pUsageProc))(pOpts, EXIT_FAILURE);
+    }
+
+    if (pOD->fOptState & OPTST_ALLOC_ARG) {
+        AGFREE(pOD->optArg.argString);
+        pOD->fOptState &= ~OPTST_ALLOC_ARG;
+    }
+
+    pOD->optArg.argInt = (unsigned long)val;
+}
+
+/*=export_func  optionTimeDate
+ * private:
+ *
+ * what:  process an option with a time and date.
+ * arg:   + tOptions* + pOpts    + program options descriptor +
+ * arg:   + tOptDesc* + pOptDesc + the descriptor for this arg +
+ *
+ * doc:
+ *  Decipher a time and date value.
+=*/
+void
+optionTimeDate(tOptions * pOpts, tOptDesc * pOD)
+{
+#if defined(HAVE_GETDATE_R) && defined(HAVE_PUTENV)
+    if ((! HAS_pzPkgDataDir(pOpts)) || (pOpts->pzPkgDataDir == NULL))
+        goto default_action;
+
+    /*
+     *  Export the DATEMSK environment variable.  getdate_r() uses it to
+     *  find the file with the strptime formats.  If we cannot find the file
+     *  we need ($PKGDATADIR/datemsk), then fall back to just a time duration.
+     */
+    {
+        static char * envptr = NULL;
+
+        if (envptr == NULL) {
+            static char const fmt[] = "DATEMSK=%s/datemsk";
+            envptr = AGALOC(sizeof(fmt) + strlen(pOpts->pzPkgDataDir), fmt);
+            sprintf(envptr, fmt, pOpts->pzPkgDataDir);
+
+            putenv(envptr);
+        }
+
+        if (access(envptr+8, R_OK) != 0)
+            goto default_action;
+    }
+
+    /*
+     *  Convert the date to a time since the epoch and stash it in a long int.
+     */
+    {
+        struct tm stm;
+        time_t tm;
+
+        if (getdate_r(pOD->optArg.argString, &stm) != 0) {
+            fprintf(stderr, zNotDate, pOpts->pzProgName,
+                    pOD->optArg.argString);
+            if ((pOpts->fOptSet & OPTPROC_ERRSTOP) != 0)
+                (*(pOpts->pUsageProc))(pOpts, EXIT_FAILURE);
+            return;
+        }
+
+        tm = mktime(&stm);
+
+        if (pOD->fOptState & OPTST_ALLOC_ARG) {
+            AGFREE(pOD->optArg.argString);
+            pOD->fOptState &= ~OPTST_ALLOC_ARG;
+        }
+
+        pOD->optArg.argInt = tm;
+    }
+    return;
+
+default_action:
+
+#endif
+    optionTimeVal(pOpts, pOD);
+    if (pOD->optArg.argInt != BAD_TIME)
+        pOD->optArg.argInt += (unsigned long)time(NULL);
+}
+/*
+ * Local Variables:
+ * mode: C
+ * c-file-style: "stroustrup"
+ * indent-tabs-mode: nil
+ * End:
+ * end of autoopts/time.c */