[win] check in public-domain getopt implementation

1 files changed, 55 insertions, 0 deletions

diff --git a/src/getopt.h b/src/getopt.h
new file mode 100644
index 0000000..49a107e
--- /dev/null
+++ b/src/getopt.h
@@ -0,0 +1,55 @@
+#ifndef GETOPT_H
+#define GETOPT_H
+
+/* include files needed by this include file */
+
+/* macros defined by this include file */
+#define no_argument     0
+#define REQUIRED_ARG    1
+#define OPTIONAL_ARG    2
+
+/* types defined by this include file */
+
+/* GETOPT_LONG_OPTION_T: The type of long option */
+typedef struct GETOPT_LONG_OPTION_T
+{
+  char *name;                   /* the name of the long option */
+  int has_arg;                  /* one of the above macros */
+  int *flag;                    /* determines if getopt_long() returns a
+                                 * value for a long option; if it is
+                                 * non-NULL, 0 is returned as a function
+                                 * value and the value of val is stored in
+                                 * the area pointed to by flag.  Otherwise,
+                                 * val is returned. */
+  int val;                      /* determines the value to return if flag is
+                                 * NULL. */
+} GETOPT_LONG_OPTION_T;
+
+typedef GETOPT_LONG_OPTION_T option;
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+  /* externally-defined variables */
+  extern char *optarg;
+  extern int optind;
+  extern int opterr;
+  extern int optopt;
+
+  /* function prototypes */
+  int getopt (int argc, char **argv, char *optstring);
+  int getopt_long (int argc, char **argv, char *shortopts,
+                   GETOPT_LONG_OPTION_T * longopts, int *longind);
+  int getopt_long_only (int argc, char **argv, char *shortopts,
+                        GETOPT_LONG_OPTION_T * longopts, int *longind);
+
+#ifdef __cplusplus
+};
+
+#endif
+
+#endif /* GETOPT_H */
+
+/* END OF FILE getopt.h */