Add forgotten cmd/wmii/error.c

cmd/wmii/error.c

@@ -0,0 +1,41 @@
+/* Copyright ©2007-2009 Kris Maglione <jg@suckless.org>
+ * See LICENSE file for license details.
+ */
+
+#include "dat.h"
+#include "fns.h"
+
+static jmp_buf	errjmp[16];
+static long	nerror;
+
+void
+error(char *fmt, ...) {
+	char errbuf[IXP_ERRMAX];
+	va_list ap;
+
+	va_start(ap, fmt);
+	vsnprint(errbuf, IXP_ERRMAX, fmt, ap);
+	va_end(ap);
+	ixp_errstr(errbuf, IXP_ERRMAX);
+
+	nexterror();
+}
+
+void
+nexterror(void) {
+	assert(nerror > 0);
+	longjmp(errjmp[--nerror], 1);
+}
+
+void
+poperror(void) {
+	assert(nerror > 0);
+	--nerror;
+}
+
+jmp_buf*
+pusherror(void) {
+	assert(nerror < nelem(errjmp));
+	return &errjmp[nerror++];
+}
+