New commandline parsing

This commit tries to centralize the user input parsing,
so that the functions really only do what they are for,
e.g. requesting for given valid input.

1 files changed, 47 insertions, 0 deletions

diff --git a/src/param.h b/src/param.h
new file mode 100644
index 0000000..553366c
--- /dev/null
+++ b/src/param.h
@@ -0,0 +1,47 @@
+/*
+ * pjctl - network projector control utility
+ *
+ * Copyright (C) 2011  Benjamin Franzke <benjaminfranzke@googlemail.com>
+ *
+ * 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/>.
+ */
+
+#ifndef PARAM_H
+#define PARAM_H
+
+enum pjctl_param_type {
+	PJCTL_PARAM_ATOM,
+	PJCTL_PARAM_RANGE,
+	PJCTL_PARAM_SWITCH,
+	PJCTL_PARAM_END
+};
+
+struct pjctl_param {
+	enum pjctl_param_type type;
+	union {
+		const char **atoms;
+		struct { int start, end, fallback; } range;
+	} p;
+};
+
+#define P (struct pjctl_param[])
+#define P_ATOM(...) { \
+	.type = PJCTL_PARAM_ATOM, \
+	.p.atoms = (const char *[]) { __VA_ARGS__, NULL } \
+}
+#define P_RANGE(a,b,c) { .type = PJCTL_PARAM_RANGE, .p.range = { (a),(b),(c) } }
+#define P_SWITCH { .type = PJCTL_PARAM_SWITCH }
+#define P_END { .type = PJCTL_PARAM_END }
+
+#endif /* PARAM_H */