--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/target-utils/libc/atoi.c	Fri Oct 28 22:20:26 2016 +0000
@@ -0,0 +1,24 @@
+atoi(p)
+	register char *p;
+{
+	register int n;
+	register int f;
+
+	n = 0;
+	f = 0;
+	for(;;p++) {
+		switch(*p) {
+		case ' ':
+		case '\t':
+			continue;
+		case '-':
+			f++;
+		case '+':
+			p++;
+		}
+		break;
+	}
+	while(*p >= '0' && *p <= '9')
+		n = n*10 + *p++ - '0';
+	return(f? -n: n);
+}