Category : OS/2 Files
Archive   : EMXLIB8F.ZIP
Filename : GETOPT.C

 
Output of file : GETOPT.C contained in archive : EMXLIB8F.ZIP
/* getopt.c (emx+gcc) -- Copyright (c) 1990-1993 by Eberhard Mattes */

#define _GETOPT_C

#include
#include
#include
#include

char *optarg = NULL;
int optind = 0; /* Default: first call */
int opterr = 1; /* Default: error messages enabled */
char *optswchar = "-"; /* Default: '-' starts options */
enum _optmode optmode = GETOPT_UNIX;

static char * next_opt; /* Next character in cluster of options */
static char * empty = ""; /* Empty string */

static int done;
static char sw_char;

static char ** options; /* List of entries which are options */
static char ** non_options; /* List of entries which are not options */
static int options_count;
static int non_options_count;

#define BEGIN do {
#define END } while (0)

#define PUT(dst) BEGIN \
if (optmode == GETOPT_ANY) \
dst[dst##_count++] = argv[optind]; \
END

int getopt (int argc, char **argv, const char *opt_str)
{
char c, *q;
int i, j;

if (optind == 0)
{
optind = 1; done = 0;
next_opt = empty;
if (optmode == GETOPT_ANY)
{
options = (char **)malloc (argc * sizeof (char *));
non_options = (char **)malloc (argc * sizeof (char *));
if (options == NULL || non_options == NULL)
{
fprintf (stderr, "out of memory (getopt)\n");
exit (255);
}
options_count = 0; non_options_count = 0;
}
}
if (done)
return (EOF);
restart:
optarg = NULL;
if (*next_opt == 0)
{
if (optind >= argc)
{
if (optmode == GETOPT_ANY)
{
j = 1;
for (i = 0; i < options_count; ++i)
argv[j++] = options[i];
for (i = 0; i < non_options_count; ++i)
argv[j++] = non_options[i];
optind = options_count+1;
free (options); free (non_options);
}
done = 1;
return (EOF);
}
else if (!strchr (optswchar, argv[optind][0]) || argv[optind][1] == 0)
{
if (optmode == GETOPT_UNIX)
{
done = 1;
return (EOF);
}
PUT (non_options);
optarg = argv[optind++];
if (optmode == GETOPT_ANY)
goto restart;
/* optmode==GETOPT_KEEP */
return (0);
}
else if (argv[optind][0] == argv[optind][1] && argv[optind][2] == 0)
{
if (optmode == GETOPT_ANY)
{
j = 1;
for (i = 0; i < options_count; ++i)
argv[j++] = options[i];
argv[j++] = argv[optind];
for (i = 0; i < non_options_count; ++i)
argv[j++] = non_options[i];
for (i = optind+1; i < argc; ++i)
argv[j++] = argv[i];
optind = options_count+2;
free (options); free (non_options);
}
++optind;
done = 1;
return (EOF);
}
else
{
PUT (options);
sw_char = argv[optind][0];
next_opt = argv[optind]+1;
}
}
c = *next_opt++;
if (*next_opt == 0) /* Move to next argument if end of argument reached */
++optind;
if (c == ':' || (q = strchr (opt_str, c)) == NULL)
{
if (opterr)
{
if (c < ' ' || c >= 127)
fprintf (stderr, "Invalid option; character code=0x%.2x\n", c);
else
fprintf (stderr, "Invalid option `%c%c'\n", sw_char, c);
}
return ('?');
}
if (q[1] == ':')
{
if (*next_opt != 0) /* Argument given */
{
optarg = next_opt;
next_opt = empty;
++optind;
}
else if (q[2] == ':')
optarg = NULL; /* Optional argument missing */
else if (optind >= argc)
{ /* Required argument missing */
if (opterr)
fprintf (stderr, "No argument for `%c%c' option\n", sw_char, c);
c = '?';
}
else
{
PUT (options);
optarg = argv[optind++];
}
}
return (c);
}


  3 Responses to “Category : OS/2 Files
Archive   : EMXLIB8F.ZIP
Filename : GETOPT.C

  1. Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

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