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- /* getopt.c -
- getopt() for those systems that don't have it.
-
- Derived from comp.sources.unix/volume3/att_getopt.
- Modified by James Clark (jjc@jclark.com).
- */
-
- #include "config.h"
-
- #ifndef HAVE_GETOPT
-
- #include "std.h"
- #include "getopt.h"
-
- #ifdef SWITCHAR
- #include <dos.h>
- #endif
-
- int opterr = 1;
- int optind = 1;
- int optopt;
- char *optarg;
-
- #ifndef OPTION_CHAR
- #define OPTION_CHAR '-'
- #endif
-
- int getopt(argc, argv, opts)
- int argc;
- char **argv;
- char *opts;
- {
- #ifdef SWITCHAR
- union REGS regs;
- static char switchar = '\0';
- #endif
- static int sp = 1;
- register int c;
- register char *cp;
- char *message;
- #ifdef SWITCHAR
- if (switchar == '\0') {
- regs.x.ax = 0x3700;
- intdos(®s, ®s);
- if (!regs.x.cflag)
- switchar = regs.h.dl;
- else
- switchar = '/';
- }
- #endif
- if (sp == 1) {
- if (optind >= argc)
- return EOF;
- if ((
- #ifdef SWITCHAR
- argv[optind][0] != switchar &&
- #endif
- argv[optind][0] != OPTION_CHAR) || argv[optind][1] == '\0') {
- #ifdef REORDER_ARGS
- int i;
- for (i = optind; i < argc; i++)
- if ((
- #ifdef SWITCHAR
- argv[i][0] == switchar ||
- #endif
- argv[i][0] == OPTION_CHAR) && argv[i][1] != '\0')
- break;
- if (i < argc) {
- c = argv[i][1];
- #ifdef CASE_INSENSITIVE_OPTIONS
- if (isupper(c))
- c = tolower(c);
- #endif
- if (c != ':' && c != OPTION_CHAR && (cp = strchr(opts, c)) != NULL
- && cp[1] == ':' && argv[i][2] == 0 && i < argc - 1) {
- int j;
- char *temp1 = argv[i];
- char *temp2 = argv[i+1];
- for (j = i - 1; j >= optind; j--)
- argv[j+2] = argv[j];
- argv[optind] = temp1;
- argv[optind+1] = temp2;
- }
- else {
- int j;
- char *temp = argv[i];
- for (j = i - 1; j >= optind; j--)
- argv[j+1] = argv[j];
- argv[optind] = temp;
- }
- }
- else
- #endif
- return EOF;
- }
- if ((argv[optind][0] == OPTION_CHAR && argv[optind][1] == OPTION_CHAR
- && argv[optind][2] == '\0')
- #ifdef SWITCHAR
- || (argv[optind][0] == switchar && argv[optind][1] == switchar
- && argv[optind][2] == '\0')
- #endif
- ) {
- optind++;
- return(EOF);
- }
- }
- optopt = c = argv[optind][sp];
- #ifdef CASE_INSENSITIVE_OPTIONS
- if (
- #ifdef USE_ISASCII
- isascii(c) &&
- #endif /* USE_ISASCII */
- isupper((unsigned char)c))
- optopt = c = tolower((unsigned char)c);
- #endif /* CASE_INSENSITIVE_OPTIONS */
- if (c == ':' || (cp = strchr(opts, c)) == NULL) {
- if (argv[optind][++sp] == '\0') {
- optind++;
- sp = 1;
- }
- message = ": illegal option -- ";
- goto bad;
- }
- if (*++cp == ':') {
- if (argv[optind][sp+1] != '\0')
- optarg = &argv[optind++][sp+1];
- else if (++optind >= argc) {
- sp = 1;
- message = ": option requires an argument -- ";
- goto bad;
- }
- else
- optarg = argv[optind++];
- sp = 1;
- }
- else {
- if (argv[optind][++sp] == '\0') {
- sp = 1;
- optind++;
- }
- optarg = NULL;
- }
- return c;
- bad:
- if (opterr) {
- fputs(argv[0], stderr);
- fputs(message, stderr);
- fputc(optopt, stderr);
- fputc('\n', stderr);
- }
- return '?';
- }
-
- #endif /* not HAVE_GETOPT */
-
- /*
- Local Variables:
- c-indent-level: 4
- c-continued-statement-offset: 4
- c-brace-offset: 4
- c-argdecl-indent: 4
- c-label-offset: -4
- tab-width: 4
- End:
- */
-
-