modules/qc/getopt.c
/* [<][>][^][v][top][bottom][index][help] */
FUNCTIONS
This source file includes following functions.
- mg_new
- mg_getopt
1 /*
2 * Copyright (c) 1987, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 /* This code has been modified from the original UC version by
35 Marek Bukowy, RIPE NCC
36 to be thread-safe
37 */
38
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <string.h>
42
43 #include "getopt.h"
44
45 getopt_state_t *
46 mg_new(int optind)
/* [<][>][^][v][top][bottom][index][help] */
47 {
48 getopt_state_t *state;
49
50 if( (state=calloc(1, sizeof(getopt_state_t))) != NULL ) {
51 state->place = EMSG;
52 state->optind = optind;
53 state->optreset = 1;
54 }
55 return state;
56 }
57
58
59 /*
60 * getopt --
61 * Parse argc/argv argument vector.
62 */
63 int
64 mg_getopt( int nargc,
/* [<][>][^][v][top][bottom][index][help] */
65 char * const *nargv,
66 const char *ostr,
67 getopt_state_t *state)
68 {
69 char *oli; /* option letter list index */
70
71 if (state->optreset || !*state->place) { /* update scanning pointer */
72 state->optreset = 0;
73 if (state->optind >= nargc || *(state->place = nargv[state->optind]) != '-') {
74 state->place = EMSG;
75 return (-1);
76 }
77 if (state->place[1] && *++(state->place) == '-') { /* found "--" */
78 ++state->optind;
79 state->place = EMSG;
80 return (-1);
81 }
82 } /* option letter okay? */
83 if ((optopt = (int)*state->place++) == (int)':' ||
84 !(oli = strchr(ostr, optopt))) {
85 /*
86 * if the user didn't specify '-' as an option,
87 * assume it means -1.
88 */
89 if (optopt == (int)'-')
90 return (-1);
91 if (!*state->place)
92 ++state->optind;
93 return (BADCH);
94 }
95 if (*++oli != ':') { /* don't need argument */
96 state->optarg = NULL;
97 if (!*state->place)
98 ++state->optind;
99 }
100 else { /* need an argument */
101 if (*state->place) /* no white space */
102 state->optarg = state->place;
103 else if (nargc <= ++state->optind) { /* no arg */
104 state->place = EMSG;
105 if (*ostr == ':')
106 return (BADARG);
107
108 return (BADCH);
109 }
110 else /* white space */
111 state->optarg = nargv[state->optind];
112 state->place = EMSG;
113 ++state->optind;
114 }
115 return (optopt); /* dump back option letter */
116 }