h_getopt_long.c revision 276478 
1/*	$NetBSD: h_getopt_long.c,v 1.1 2011/01/01 23:56:49 pgoyette Exp $	*/
2
3/*-
4 * Copyright (c) 2007 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Christos Zoulas.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <ctype.h>
33#include <err.h>
34#include <getopt.h>
35#include <stdio.h>
36#include <string.h>
37#include <stdlib.h>
38#include <unistd.h>
39#ifdef __FreeBSD__
40#include <libutil.h>
41#endif
42
43#define SKIPWS(p)	while (isspace((int)(*p))) p++
44#define	WS	"\t\n "
45
46int
47main(int argc, char *argv[])
48{
49	size_t len, lineno = 0;
50	char *line, *eptr, *longopt, *ptr, *optstring = NULL, *result = NULL;
51	char buf[1024];
52	char *args[128];
53	char arg[256];
54	int nargs = -1;
55	int c;
56	int nlongopts = 0;
57	int maxnlongopts = 0;
58	int *longopt_flags = NULL;
59	struct option *longopts = NULL;
60
61	while ((line = fparseln(stdin, &len, &lineno, NULL, 0)) != NULL) {
62		if (strncmp(line, "optstring:", 10) == 0) {
63			if (optstring)
64				free(optstring);
65			optstring = strtok(&line[11], WS);
66			if (optstring == NULL)
67			    errx(1, "missing optstring at line %ld",
68				(unsigned long)lineno);
69			optstring = strdup(optstring);
70		} else if (strncmp(line, "longopts:", 9) == 0) {
71			if (longopts) {
72				int i;
73				for (i = 0; i < nlongopts; i++)
74					if (longopts[i].name != NULL)
75						free(__UNCONST(longopts[i].name));
76				free(longopts);
77			}
78			if (longopt_flags)
79				free(longopt_flags);
80			nlongopts = 0;
81			ptr = strtok(&line[10], WS);
82			if (ptr == NULL)
83				errx(1, "missing longopts at line %ld",
84				    (unsigned long)lineno);
85			maxnlongopts = strtoul(ptr, &eptr, 10);
86			if (*eptr != '\0')
87				warnx("garbage in longopts at line %ld",
88				    (unsigned long)lineno);
89			maxnlongopts++;		/* space for trailer */
90			longopts =
91			    (struct option *)calloc(sizeof(struct option),
92						    maxnlongopts);
93			if (longopts == NULL)
94				err(1, "calloc");
95			longopt_flags = (int *)calloc(sizeof(int), maxnlongopts);
96			if (longopt_flags == NULL)
97				err(1, "calloc");
98		} else if (strncmp(line, "longopt:", 8) == 0) {
99			if (longopts == NULL)
100				errx(1, "longopt: without longopts at line %ld",
101				    (unsigned long)lineno);
102			if (nlongopts >= maxnlongopts)
103				errx(1, "longopt: too many options at line %ld",
104				    (unsigned long)lineno);
105			/* name */
106			ptr = &line[9];
107			SKIPWS(ptr);
108			longopt = strsep(&ptr, ",");
109			if (longopt == NULL)
110				errx(1, "missing longopt at line %ld",
111				    (unsigned long)lineno);
112			longopts[nlongopts].name = strdup(longopt);
113			/* has_arg */
114			SKIPWS(ptr);
115			longopt = strsep(&ptr, ",");
116			if (*longopt != '\0') {
117				if (strncmp(longopt, "0", 1) == 0 ||
118				    strncmp(longopt, "no_argument", 2) == 0)
119					longopts[nlongopts].has_arg = no_argument;
120				else if (strncmp(longopt, "1", 1) == 0 ||
121					 strncmp(longopt, "required_argument", 8) == 0)
122					longopts[nlongopts].has_arg = required_argument;
123				else if (strncmp(longopt, "2", 1) == 0 ||
124					 strncmp(longopt, "optional_argument", 8) == 0)
125					longopts[nlongopts].has_arg = optional_argument;
126				else
127					errx(1, "unknown has_arg %s at line %ld",
128					    longopt, (unsigned long)lineno);
129			}
130			/* flag */
131			SKIPWS(ptr);
132			longopt = strsep(&ptr, ",");
133			if (*longopt != '\0' &&
134			    strncmp(longopt, "NULL", 4) != 0)
135				longopts[nlongopts].flag = &longopt_flags[nlongopts];
136			/* val */
137			SKIPWS(ptr);
138			longopt = strsep(&ptr, ",");
139			if (*longopt == '\0')
140				errx(1, "missing val at line %ld",
141				    (unsigned long)lineno);
142			if (*longopt != '\'') {
143				longopts[nlongopts].val =
144			            (int)strtoul(longopt, &eptr, 10);
145				if (*eptr != '\0')
146					errx(1, "invalid val at line %ld",
147					    (unsigned long)lineno);
148			} else
149				longopts[nlongopts].val = (int)longopt[1];
150			nlongopts++;
151		} else if (strncmp(line, "args:", 5) == 0) {
152			for (; nargs >= 0; nargs--) {
153				if (args[nargs] != NULL)
154					free(args[nargs]);
155			}
156			args[nargs = 0] = strtok(&line[6], WS);
157			if (args[nargs] == NULL)
158				errx(1, "Missing args");
159
160			args[nargs] = strdup(args[nargs]);
161			while ((args[++nargs] = strtok(NULL, WS)) != NULL)
162				args[nargs] = strdup(args[nargs]);
163		} else if (strncmp(line, "result:", 7) == 0) {
164			int li;
165			buf[0] = '\0';
166			optind = optreset = 1;
167			if (result)
168				free(result);
169			result = strtok(&line[8], WS);
170			if (result == NULL)
171				errx(1, "missing result at line %ld",
172				    (unsigned long)lineno);
173			if (optstring == NULL)
174				errx(1, "result: without optstring");
175			if (longopts == NULL || nlongopts == 0)
176				errx(1, "result: without longopts");
177			result = strdup(result);
178			if (nargs == -1)
179				errx(1, "result: without args");
180			li = -2;
181			while ((c = getopt_long(nargs, args, optstring,
182				       	longopts, &li)) != -1)  {
183				if (c == ':')
184					errx(1, "`:' found as argument char");
185				if (li == -2) {
186					ptr = strchr(optstring, c);
187					if (ptr == NULL) {
188						snprintf(arg, sizeof(arg),
189						    "!%c,", c);
190						strcat(buf, arg);
191						continue;
192					}
193					if (ptr[1] != ':')
194						snprintf(arg, sizeof(arg),
195						    "%c,", c);
196					else
197						snprintf(arg, sizeof(arg),
198						    "%c=%s,", c, optarg);
199				} else {
200					switch (longopts[li].has_arg) {
201					case no_argument:
202						snprintf(arg, sizeof(arg), "-%s,",
203						    longopts[li].name);
204						break;
205					case required_argument:
206						snprintf(arg, sizeof(arg),
207						    "-%s=%s,",
208						    longopts[li].name, optarg);
209						break;
210					case optional_argument:
211						snprintf(arg, sizeof(arg),
212						    "-%s%s%s,",
213						    longopts[li].name,
214						    (optarg)? "=" : "",
215						    (optarg)? optarg : "");
216						break;
217					default:
218						errx(1, "internal error");
219					}
220				}
221				strcat(buf, arg);
222				li = -2;
223			}
224			len = strlen(buf);
225			if (len > 0) {
226				buf[len - 1] = '|';
227				buf[len] = '\0';
228			} else {
229				buf[0] = '|';
230				buf[1] = '\0';
231			}
232			snprintf(arg, sizeof(arg), "%d", nargs - optind);
233			strcat(buf, arg);
234			if (strcmp(buf, result) != 0)
235				errx(1, "`%s' != `%s'", buf, result);
236		} else
237			errx(1, "unknown directive at line %ld",
238			    (unsigned long)lineno);
239		free(line);
240	}
241	return 0;
242}
243