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engines/glk/tads/tads2/command_line.h

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/* interface to command line option service routines
+ */
+
+#ifndef GLK_TADS_TADS2_COMMAND_LINE
+#define GLK_TADS_TADS2_COMMAND_LINE
+
+#include "glk/tads/tads2/error_handling.h"
+#include "glk/tads/os_frob_tads.h"
+
+namespace Glk {
+namespace TADS {
+namespace TADS2 {
+
+/*
+ *   Get argument to an option.  Option can be rammed up against option
+ *   letter(s) with no space, or can be separated by a space.  argp is a
+ *   pointer to the pointer to the current position in the argv[] array;
+ *   ip is a pointer to the index in the argv[] array.  Both *argpp and
+ *   *ip are incremented if the next word must be read.  argc is the total
+ *   number of arguments.  ofs gives the number of characters (NOT
+ *   including the '-') in this option flag; most options will have ofs==1
+ *   since they are of the form '-x'.  usagefn is a function to call if
+ *   the parsing fails; it is not expected to return, but should signal an
+ *   error instead.
+ */
+char *cmdarg(errcxdef *ec, char ***argpp, int *ip, int argc,
+			 int ofs, void (*usagefn)(errcxdef*));
+
+
+/*
+ *   Read a toggle argument.  prv is the previous value (prior to this
+ *   switch) of the parameter (TRUE or FALSE).  argp is a pointer to the
+ *   current argument word.  ofs is the length of this option flag, NOT
+ *   including the '-'; most options have ofs==1 since they are of the
+ *   form '-x'.  If the option is followed by '+', the value returned is
+ *   TRUE; if it's followed by '-', the value is FALSE; if followed by
+ *   nothing, the option is the logical inverse of the previous value.  If
+ *   it's followed by any other character, we call the usage callback,
+ *   which is not expected to return, but should signal an error.
+ */
+int cmdtog(struct errcxdef *ec, int prv, char *argp, int ofs,
+		   void (*usagefn)(errcxdef*));
+
+} // End of namespace TADS2
+} // End of namespace TADS
+} // End of namespace Glk
+
+#endif