10 int xoptind = 1; /* index of which argument is next */
11 char *xoptarg; /* pointer to argument of current option */
12 int xopterr = 0; /* allow error message */
14 static char *letP = NULL; /* remember next option char's location */
15 char SW = '-'; /* DOS switch character, either '-' or '/' */
18 Parse the command line options, System V style.
20 Standard option syntax is:
22 option ::= SW [optLetter]* [argLetter space* argument]
26 int xgetopt(int argc, char *argv[], char *optionS)
37 if ((letP = argv[xoptind]) == NULL ||
38 *(letP++) != SW) goto gopEOF;
40 xoptind++; goto gopEOF;
43 if (0 == (ch = *(letP++))) {
44 xoptind++; goto gopEOF;
46 if (':' == ch || (optP = strchr(optionS, ch)) == NULL)
48 if (':' == *(++optP)) {
51 if (argc <= xoptind) goto gopError;
52 letP = argv[xoptind++];
66 xoptarg = letP = NULL;
73 perror ("get command line option");