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- #include <stdio.h>
- #include <string.h>
- #include <assert.h>
- #include <stdlib.h>
-
- #ifdef WIN32
-
- #define OPTERRCOLON (1)
- #define OPTERRNF (2)
- #define OPTERRARG (3)
-
- char *optarg;
- int optind = 1;
- int opterr = 1;
- int optopt;
-
- static int
- optiserr(int argc, char * const *argv, int oint, const char *optstr,
- int optchr, int err)
- {
- if(opterr)
- {
- fprintf(stderr, "Error in argument %d, char %d: ", oint, optchr+1);
- switch(err)
- {
- case OPTERRCOLON:
- fprintf(stderr, ": in flags\n");
- break;
- case OPTERRNF:
- fprintf(stderr, "option not found %c\n", argv[oint][optchr]);
- break;
- case OPTERRARG:
- fprintf(stderr, "no argument for option %c\n", argv[oint][optchr]);
- break;
- default:
- fprintf(stderr, "unknown\n");
- break;
- }
- }
- optopt = argv[oint][optchr];
- return('?');
- }
-
-
-
- int
- getopt(int argc, char* const *argv, const char *optstr)
- {
- static int optchr = 0;
- static int dash = 0; /* have already seen the - */
-
- char *cp;
-
- if(optind >= argc)
- return(EOF);
- if(!dash && (argv[optind][0] != '-'))
- return(EOF);
- if(!dash && (argv[optind][0] == '-') && !argv[optind][1])
- {
- /*
- * use to specify stdin. Need to let pgm process this and
- * the following args
- */
- return(EOF);
- }
- if((argv[optind][0] == '-') && (argv[optind][1] == '-'))
- {
- /* -- indicates end of args */
- optind++;
- return(EOF);
- }
- if(!dash)
- {
- assert((argv[optind][0] == '-') && argv[optind][1]);
- dash = 1;
- optchr = 1;
- }
-
- /* Check if the guy tries to do a -: kind of flag */
- assert(dash);
- if(argv[optind][optchr] == ':')
- {
- dash = 0;
- optind++;
- return(optiserr(argc, argv, optind-1, optstr, optchr, OPTERRCOLON));
- }
- if(!(cp = strchr(optstr, argv[optind][optchr])))
- {
- int errind = optind;
- int errchr = optchr;
-
- if(!argv[optind][optchr+1])
- {
- dash = 0;
- optind++;
- }
- else
- optchr++;
- return(optiserr(argc, argv, errind, optstr, errchr, OPTERRNF));
- }
- if(cp[1] == ':')
- {
- dash = 0;
- optind++;
- if(optind == argc)
- return(optiserr(argc, argv, optind-1, optstr, optchr, OPTERRARG));
- optarg = argv[optind++];
- return(*cp);
- }
- else
- {
- if(!argv[optind][optchr+1])
- {
- dash = 0;
- optind++;
- }
- else
- optchr++;
- return(*cp);
- }
- assert(0);
- return(0);
- }
-
- #endif /* WIN32 */
-
- #ifdef TESTGETOPT
- int
- main (int argc, char **argv)
- {
- int c;
- extern char *optarg;
- extern int optind;
- int aflg = 0;
- int bflg = 0;
- int errflg = 0;
- char *ofile = NULL;
-
- while ((c = getopt(argc, argv, "abo:")) != EOF)
- switch (c) {
- case 'a':
- if (bflg)
- errflg++;
- else
- aflg++;
- break;
- case 'b':
- if (aflg)
- errflg++;
- else
- bflg++;
- break;
- case 'o':
- ofile = optarg;
- (void)printf("ofile = %s\n", ofile);
- break;
- case '?':
- errflg++;
- }
- if (errflg) {
- (void)fprintf(stderr,
- "usage: cmd [-a|-b] [-o <filename>] files...\n");
- exit (2);
- }
- for ( ; optind < argc; optind++)
- (void)printf("%s\n", argv[optind]);
- return 0;
- }
-
- #endif /* TESTGETOPT */