mirror of https://github.com/python/cpython
84 lines
2.3 KiB
C
84 lines
2.3 KiB
C
/*---------------------------------------------------------------------------*
|
|
* <RCS keywords>
|
|
*
|
|
* C++ Library
|
|
*
|
|
* Copyright 1992-1994, David Gottner
|
|
*
|
|
* All Rights Reserved
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software and its
|
|
* documentation for any purpose and without fee is hereby granted,
|
|
* provided that the above copyright notice, this permission notice and
|
|
* the following disclaimer notice appear unmodified in all copies.
|
|
*
|
|
* I DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL I
|
|
* BE LIABLE FOR ANY SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY
|
|
* DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA, OR PROFITS, WHETHER
|
|
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
|
|
* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*
|
|
* Nevertheless, I would like to know about bugs in this library or
|
|
* suggestions for improvment. Send bug reports and feedback to
|
|
* davegottner@delphi.com.
|
|
*---------------------------------------------------------------------------*/
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
int _PyOS_opterr = 1; /* generate error messages */
|
|
int _PyOS_optind = 1; /* index into argv array */
|
|
char *_PyOS_optarg = NULL; /* optional argument */
|
|
|
|
int _PyOS_GetOpt(int argc, char **argv, char *optstring)
|
|
{
|
|
static char *opt_ptr = "";
|
|
char *ptr;
|
|
int option;
|
|
|
|
if (*opt_ptr == '\0') {
|
|
|
|
if (_PyOS_optind >= argc || argv[_PyOS_optind][0] != '-' ||
|
|
argv[_PyOS_optind][1] == '\0' /* lone dash */ )
|
|
return -1;
|
|
|
|
else if (strcmp(argv[_PyOS_optind], "--") == 0) {
|
|
++_PyOS_optind;
|
|
return -1;
|
|
}
|
|
|
|
opt_ptr = &argv[_PyOS_optind++][1];
|
|
}
|
|
|
|
if ( (option = *opt_ptr++) == '\0')
|
|
return -1;
|
|
|
|
if ((ptr = strchr(optstring, option)) == NULL) {
|
|
if (_PyOS_opterr)
|
|
fprintf(stderr, "Unknown option: -%c\n", option);
|
|
|
|
return '?';
|
|
}
|
|
|
|
if (*(ptr + 1) == ':') {
|
|
if (*opt_ptr != '\0') {
|
|
_PyOS_optarg = opt_ptr;
|
|
opt_ptr = "";
|
|
}
|
|
|
|
else {
|
|
if (_PyOS_optind >= argc) {
|
|
if (_PyOS_opterr)
|
|
fprintf(stderr,
|
|
"Argument expected for the -%c option\n", option);
|
|
return '?';
|
|
}
|
|
|
|
_PyOS_optarg = argv[_PyOS_optind++];
|
|
}
|
|
}
|
|
|
|
return option;
|
|
}
|