add LCC - a better C-Compiler for WEGA

WEGA/contrib/lcc/lib/libc/port/gen/ssignal.c

@@ -0,0 +1,46 @@
+/*
+ *	ssignal, gsignal: software signals
+ */
+#include <signal.h>
+
+/* Highest allowable user signal number */
+#define MAXSIG 16
+
+/* Lowest allowable signal number (lowest user number is always 1) */
+#define MINSIG (-4)
+
+/* Table of signal values */
+static int (*sigs[MAXSIG-MINSIG+1])();
+
+int
+(*ssignal(sig, fn))()
+int sig;
+register int (*fn)();
+{
+	register int (*savefn)();
+
+	if(sig >= MINSIG && sig <= MAXSIG) {
+		savefn = sigs[sig-MINSIG];
+		sigs[sig-MINSIG] = fn;
+	} else
+		savefn = SIG_DFL;
+
+	return(savefn);
+}
+
+int
+gsignal(sig)
+register int sig;
+{
+	register int (*sigfn)();
+
+	if(sig < MINSIG || sig > MAXSIG ||
+				(sigfn = sigs[sig-MINSIG]) == SIG_DFL)
+		return(0);
+	else if(sigfn == SIG_IGN)
+		return(1);
+	else {
+		sigs[sig-MINSIG] = SIG_DFL;
+		return((*sigfn)(sig));
+	}
+}