1 files changed, 97 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/com32/lib/getopt.c b/contrib/syslinux-4.02/com32/lib/getopt.c
new file mode 100644
index 0000000..806735d
--- /dev/null
+++ b/contrib/syslinux-4.02/com32/lib/getopt.c
@@ -0,0 +1,97 @@
+/*
+ * getopt.c
+ *
+ * Simple POSIX getopt(), no GNU extensions...
+ */
+
+#include <stdint.h>
+#include <unistd.h>
+#include <string.h>
+
+char *optarg;
+int optind, opterr, optopt;
+static struct getopt_private_state {
+	const char *optptr;
+	const char *last_optstring;
+	char *const *last_argv;
+} pvt;
+
+int getopt(int argc, char *const *argv, const char *optstring)
+{
+	const char *carg;
+	const char *osptr;
+	int opt;
+
+	/* getopt() relies on a number of different global state
+	   variables, which can make this really confusing if there is
+	   more than one use of getopt() in the same program.  This
+	   attempts to detect that situation by detecting if the
+	   "optstring" or "argv" argument have changed since last time
+	   we were called; if so, reinitialize the query state. */
+
+	if (optstring != pvt.last_optstring || argv != pvt.last_argv ||
+	    optind < 1 || optind > argc) {
+		/* optind doesn't match the current query */
+		pvt.last_optstring = optstring;
+		pvt.last_argv = argv;
+		optind = 1;
+		pvt.optptr = NULL;
+	}
+
+	carg = argv[optind];
+
+	/* First, eliminate all non-option cases */
+
+	if (!carg || carg[0] != '-' || !carg[1]) {
+		return -1;
+	}
+
+	if (carg[1] == '-' && !carg[2]) {
+		optind++;
+		return -1;
+	}
+
+	if ((uintptr_t) (pvt.optptr - carg) > (uintptr_t) strlen(carg)) {
+		/* Someone frobbed optind, change to new opt. */
+		pvt.optptr = carg + 1;
+	}
+
+	opt = *pvt.optptr++;
+
+	if (opt != ':' && (osptr = strchr(optstring, opt))) {
+		if (osptr[1] == ':') {
+			if (*pvt.optptr) {
+				/* Argument-taking option with attached
+				   argument */
+				optarg = (char *)pvt.optptr;
+				optind++;
+			} else {
+				/* Argument-taking option with non-attached
+				   argument */
+				if (argv[optind + 1]) {
+					optarg = (char *)argv[optind+1];
+					optind += 2;
+				} else {
+					/* Missing argument */
+					optind++;
+					return (optstring[0] == ':')
+						? ':' : '?';
+				}
+			}
+			return opt;
+		} else {
+			/* Non-argument-taking option */
+			/* pvt.optptr will remember the exact position to
+			   resume at */
+			if (!*pvt.optptr)
+				optind++;
+			return opt;
+		}
+	} else {
+		/* Unknown option */
+		optopt = opt;
+		if (!*pvt.optptr)
+			optind++;
+		return '?';
+	}
+}