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-rwxr-xr-xsrc/getopt.c76
1 files changed, 76 insertions, 0 deletions
diff --git a/src/getopt.c b/src/getopt.c
new file mode 100755
index 0000000..36a9bc1
--- /dev/null
+++ b/src/getopt.c
@@ -0,0 +1,76 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+int optind = 1;
+char *optarg = (char *)NULL;
+
+int getopt (int argc, char **argv, char *optstring)
+{
+ int cur_option; /* Current option */
+ char *cp; /* Character pointer */
+ static int GetOptionPosition = 1;
+
+ if (GetOptionPosition == 1)
+ {
+
+/* Check for out of range, correct start character and not single */
+
+ if ((optind >= argc) || (*argv[optind] != '-') || !argv[optind][1])
+ return EOF;
+
+ if (!strcmp (argv[optind], "--"))
+ return EOF;
+ }
+
+/* Get the current character from the current argument vector */
+
+ cur_option = argv[optind][GetOptionPosition];
+
+/* Validate it */
+
+ if ((cur_option == ':') ||
+ ((cp = strchr (optstring, cur_option)) == (char *)NULL))
+ {
+
+/* Move to the next offset */
+
+ if (!argv[optind][++GetOptionPosition])
+ {
+ optind++;
+ GetOptionPosition = 1;
+ }
+
+ return '?';
+ }
+
+/* Parameters following ? */
+
+ optarg = (char *)NULL;
+
+ if (*(++cp) == ':')
+ {
+ if (argv[optind][GetOptionPosition + 1])
+ optarg = &argv[optind++][GetOptionPosition + 1];
+
+ else if (++optind >= argc)
+ {
+ optarg = (char *)NULL;
+ GetOptionPosition = 1;
+ return '?';
+ }
+
+ else
+ optarg = argv[optind++];
+
+ GetOptionPosition = 1;
+ }
+
+ else if (!argv[optind][++GetOptionPosition])
+ {
+ GetOptionPosition = 1;
+ optind++;
+ }
+
+ return cur_option;
+}