1 files changed, 52 insertions, 0 deletions
diff --git a/lcc/cpp/getopt.c b/lcc/cpp/getopt.c
new file mode 100755
index 0000000..69e9ab4
--- /dev/null
+++ b/lcc/cpp/getopt.c
@@ -0,0 +1,52 @@
+#include	<stdio.h>
+#define EPR                 fprintf(stderr,
+#define ERR(str, chr)       if(opterr){EPR "%s%c\n", str, chr);}
+int     opterr = 1;
+int     optind = 1;
+int	optopt;
+char    *optarg;
+char    *strchr();
+
+int
+getopt (int argc, char *const argv[], const char *opts)
+{
+	static int sp = 1;
+	int c;
+	char *cp;
+
+	if (sp == 1)
+		if (optind >= argc ||
+		   argv[optind][0] != '-' || argv[optind][1] == '\0')
+			return -1;
+		else if (strcmp(argv[optind], "--") == 0) {
+			optind++;
+			return -1;
+		}
+	optopt = c = argv[optind][sp];
+	if (c == ':' || (cp=strchr(opts, c)) == 0) {
+		ERR (": illegal option -- ", c);
+		if (argv[optind][++sp] == '\0') {
+			optind++;
+			sp = 1;
+		}
+		return '?';
+	}
+	if (*++cp == ':') {
+		if (argv[optind][sp+1] != '\0')
+			optarg = &argv[optind++][sp+1];
+		else if (++optind >= argc) {
+			ERR (": option requires an argument -- ", c);
+			sp = 1;
+			return '?';
+		} else
+			optarg = argv[optind++];
+		sp = 1;
+	} else {
+		if (argv[optind][++sp] == '\0') {
+			sp = 1;
+			optind++;
+		}
+		optarg = 0;
+	}
+	return c;
+}