From 0b44a0315b47dd8eced9f3b7f31580cf14bbfc01 Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Sat, 12 Feb 2011 00:22:29 -0500
Subject: initial check-in, version 0.5.0

---
 src/signal/sigismember.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 src/signal/sigismember.c

(limited to 'src/signal/sigismember.c')

diff --git a/src/signal/sigismember.c b/src/signal/sigismember.c
new file mode 100644
index 00000000..afd29e52
--- /dev/null
+++ b/src/signal/sigismember.c
@@ -0,0 +1,12 @@
+#include <signal.h>
+#include <errno.h>
+
+int sigismember(const sigset_t *set, int sig)
+{
+	unsigned s = sig-1;
+	if (s >= 8*sizeof(sigset_t)) {
+		errno = EINVAL;
+		return -1;
+	}
+	return !!(set->__bits[s/8/sizeof *set->__bits] & 1UL<<(s&8*sizeof *set->__bits-1));
+}
-- 
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