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DEFINITIONS
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 "rip.h"
40
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <string.h>
44
45 getopt_state_t *
46 mg_new(int optind)
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47 {
48 getopt_state_t *state;
49
50 if( (state=UT_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,
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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
74 /* handle wrongly tokenised space (grrrrr...) - skip empty fields */
75 while(state->optind < nargc && *(nargv[state->optind]) == '\0') {
76 state->optind++;
77 }
78 if (state->optind >= nargc || *(state->place = nargv[state->optind]) != '-') {
79 state->place = EMSG;
80 return (-1);
81 }
82 if (state->place[1] && *++(state->place) == '-') { /* found "--" */
83 ++state->optind;
84 state->place = EMSG;
85 return (-1);
86 }
87 } /* option letter okay? */
88 if ((state->optopt = (int)*state->place++) == (int)':' ||
89 !(oli = strchr(ostr, state->optopt))) {
90 /*
91 * if the user didn't specify '-' as an option,
92 * assume it means -1.
93 */
94 if (state->optopt == (int)'-')
95 return (-1);
96 if (!*state->place)
97 ++state->optind;
98 return (BADCH);
99 }
100 if (*++oli != ':') { /* don't need argument */
101 state->optarg = NULL;
102 if (!*state->place)
103 ++state->optind;
104 }
105 else { /* need an argument */
106 if (*state->place) /* no white space */
107 state->optarg = state->place;
108 else if (nargc <= ++state->optind) { /* no arg */
109 state->place = EMSG;
110 if (*ostr == ':')
111 return (BADARG);
112
113 return (BADCH);
114 }
115 else /* white space */
116 state->optarg = nargv[state->optind];
117 state->place = EMSG;
118 ++state->optind;
119 }
120 return (state->optopt); /* dump back option letter */
121 }