lib: Add mlibc

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 37 insertions, 0 deletions

diff --git a/lib/mlibc/options/internal/generic/sigset.cpp b/lib/mlibc/options/internal/generic/sigset.cpp
new file mode 100644
index 0000000..134277d
--- /dev/null
+++ b/lib/mlibc/options/internal/generic/sigset.cpp
@@ -0,0 +1,37 @@
+#include <bits/sigset_t.h>
+#include <bits/ensure.h>
+
+int sigemptyset(sigset_t *sigset) {
+	*sigset = 0;
+	return 0;
+}
+
+int sigfillset(sigset_t *sigset) {
+	*sigset = ~sigset_t(0);
+	return 0;
+}
+
+// TODO: Return EINVAL instead of __ensure()ing.
+
+int sigaddset(sigset_t *sigset, int sig) {
+	int signo = sig - 1;
+	// TODO: do not hard code CHAR_BITS
+	__ensure((unsigned int)signo < sizeof(sigset_t) * 8);
+	*sigset |= sigset_t(1) << signo;
+	return 0;
+}
+
+int sigdelset(sigset_t *sigset, int sig) {
+	int signo = sig - 1;
+	// TODO: do not hard code CHAR_BITS
+	__ensure((unsigned int)signo < sizeof(sigset_t) * 8);
+	*sigset &= ~(sigset_t(1) << signo);
+	return 0;
+}
+
+int sigismember(const sigset_t *set, int sig) {
+	int signo = sig - 1;
+	// TODO: do not hard code CHAR_BITS
+	__ensure((unsigned int)signo < sizeof(sigset_t) * 8);
+	return (*set) & (sigset_t(1) << signo);
+}