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