Initial Commit

thirdparty/capstone/cstool/getopt.c

@@ -0,0 +1,76 @@
+#include <string.h>
+#include <stdio.h>
+
+#include "getopt.h"
+
+int opterr = 1, /* if error message should be printed */
+optind = 1, /* index into parent argv vector */
+optopt, /* character checked for validity */
+optreset; /* reset getopt */
+const char *optarg; /* argument associated with option */
+
+#define BADCH (int)'?'
+#define BADARG (int)':'
+#define EMSG ""
+
+/*
+ * getopt --
+ *      Parse argc/argv argument vector.
+ */
+int getopt (int nargc, char * const nargv[], const char *ostr)
+{
+	static const char *place = EMSG;              /* option letter processing */
+	const char *oli;                        /* option letter list index */
+
+	if (optreset || !*place) {              /* update scanning pointer */
+		optreset = 0;
+		if (optind >= nargc || *(place = nargv[optind]) != '-') {
+			place = EMSG;
+			return (-1);
+		}
+
+		if (place[1] && *++place == '-') {      /* found "--" */
+			++optind;
+			place = EMSG;
+			return (-1);
+		}
+	}                                       /* option letter okay? */
+
+	if ((optopt = (int)*place++) == (int)':' ||
+		!(oli = strchr (ostr, optopt))) {
+		/*
+		* if the user didn't specify '-' as an option,
+		* assume it means -1.
+		*/
+		if (optopt == (int)'-')
+			return (-1);
+		if (!*place)
+			++optind;
+		if (opterr && *ostr != ':')
+			(void)printf ("illegal option -- %c\n", optopt);
+		return (BADCH);
+	}
+
+	if (*++oli != ':') {                    /* don't need argument */
+		optarg = NULL;
+		if (!*place)
+			++optind;
+	} else {                                  /* need an argument */
+		if (*place)                     /* no white space */
+			optarg = place;
+		else if (nargc <= ++optind) {   /* no arg */
+			place = EMSG;
+			if (*ostr == ':')
+				return (BADARG);
+			if (opterr)
+				(void)printf ("option requires an argument -- %c\n", optopt);
+			return (BADCH);
+		} else                            /* white space */
+			optarg = nargv[optind];
+		place = EMSG;
+		++optind;
+	}
+
+	return optopt;        /* dump back option letter */
+}
+