dtcalc: Remove more 'extern' variables in .c files, by putting them in .h. Also reduce scope of vars and funcs with static.

cde/programs/dtcalc/text.h

@@ -0,0 +1,40 @@
+/*
+ * CDE - Common Desktop Environment
+ *
+ * Copyright (c) 2021 Peter Howkins. All rights reserved.
+ *
+ * These libraries and programs are free software; you can
+ * redistribute them and/or modify them under the terms of the GNU
+ * Lesser General Public License as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * These libraries and programs are distributed in the hope that
+ * they will be useful, but WITHOUT ANY WARRANTY; without even the
+ * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ * PURPOSE. See the GNU Lesser General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with these libraries and programs; if not, write
+ * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
+ * Floor, Boston, MA 02110-1301 USA
+ */
+#ifndef __TEXT_H
+#define __TEXT_H
+
+extern char *base_str[] ;       /* Strings for each base value. */
+extern char *dtype_str[] ;      /* Strings for each display mode value. */
+extern char *cmdstr[] ;         /* Strings for each command line option. */
+extern char *calc_res[] ;       /* Calctool X resources. */
+extern char *lstrs[] ;          /* Labels for various Motif items. */
+extern char *mess[] ;           /* Message strings. */
+extern char *mode_str[] ;       /* Strings for each mode value. */
+extern char *ttype_str[] ;      /* Strings for each trig type value. */
+extern char *vstrs[] ;          /* Various strings. */
+extern char *mpstrs[] ;         /* MP errors (visible with -D option). */
+extern char *pstrs[] ;          /* Property sheet strings. */
+extern char *opts[] ;           /* Command line option strings. */
+extern char *ustrs[] ;          /* Usage message strings. */
+
+#endif /* __TEXT_H */