1/*
2 * Copyright (C) 2004-2007, 2009  Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 1999-2001  Internet Software Consortium.
4 *
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
16 */
17
18/*
19 * Copyright (c) 1987, 1993, 1994
20 *	The Regents of the University of California.  All rights reserved.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the above copyright
26 *    notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 *    notice, this list of conditions and the following disclaimer in the
29 *    documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 *    must display the following acknowledgement:
32 *	This product includes software developed by the University of
33 *	California, Berkeley and its contributors.
34 * 4. Neither the name of the University nor the names of its contributors
35 *    may be used to endorse or promote products derived from this software
36 *    without specific prior written permission.
37 *
38 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
39 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
41 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
42 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
43 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
44 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
45 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
46 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
47 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48 * SUCH DAMAGE.
49 */
50
51/* $Id: gen-win32.h,v 1.25 2009/01/17 23:47:42 tbox Exp $ */
52
53/*! \file
54 * \author Principal Authors: Computer Systems Research Group at UC Berkeley
55 * \author Principal ISC caretaker: DCL
56 */
57
58/*
59 * \note This file was adapted from the NetBSD project's source tree, RCS ID:
60 *    NetBSD: getopt.c,v 1.15 1999/09/20 04:39:37 lukem Exp
61 *
62 * The primary change has been to rename items to the ISC namespace
63 * and format in the ISC coding style.
64 *
65 * This file is responsible for defining two operations that are not
66 * directly portable between Unix-like systems and Windows NT, option
67 * parsing and directory scanning.  It is here because it was decided
68 * that the "gen" build utility was not to depend on libisc.a, so
69 * the functions declared in isc/commandline.h and isc/dir.h could not
70 * be used.
71 *
72 * The commandline stuff is pretty much a straight copy from the initial
73 * isc/commandline.c.  The dir stuff was shrunk to fit the needs of gen.c.
74 */
75
76#ifndef DNS_GEN_WIN32_H
77#define DNS_GEN_WIN32_H 1
78
79#include <stdio.h>
80#include <string.h>
81#include <windows.h>
82
83#include <isc/boolean.h>
84#include <isc/lang.h>
85
86int isc_commandline_index = 1;		/* Index into parent argv vector. */
87int isc_commandline_option;		/* Character checked for validity. */
88
89char *isc_commandline_argument;		/* Argument associated with option. */
90char *isc_commandline_progname;		/* For printing error messages. */
91
92isc_boolean_t isc_commandline_errprint = ISC_TRUE; /* Print error messages. */
93isc_boolean_t isc_commandline_reset = ISC_TRUE; /* Reset processing. */
94
95#define BADOPT	'?'
96#define BADARG	':'
97#define ENDOPT	""
98
99ISC_LANG_BEGINDECLS
100
101/*
102 * getopt --
103 *	Parse argc/argv argument vector.
104 */
105int
106isc_commandline_parse(int argc, char * const *argv, const char *options) {
107	static char *place = ENDOPT;
108	char *option;			/* Index into *options of option. */
109
110	/*
111	 * Update scanning pointer, either because a reset was requested or
112	 * the previous argv was finished.
113	 */
114	if (isc_commandline_reset || *place == '\0') {
115		isc_commandline_reset = ISC_FALSE;
116
117		if (isc_commandline_progname == NULL)
118			isc_commandline_progname = argv[0];
119
120		if (isc_commandline_index >= argc ||
121		    *(place = argv[isc_commandline_index]) != '-') {
122			/*
123			 * Index out of range or points to non-option.
124			 */
125			place = ENDOPT;
126			return (-1);
127		}
128
129		if (place[1] != '\0' && *++place == '-' && place[1] == '\0') {
130			/*
131			 * Found '--' to signal end of options.	 Advance
132			 * index to next argv, the first non-option.
133			 */
134			isc_commandline_index++;
135			place = ENDOPT;
136			return (-1);
137		}
138	}
139
140	isc_commandline_option = *place++;
141	option = strchr(options, isc_commandline_option);
142
143	/*
144	 * Ensure valid option has been passed as specified by options string.
145	 * '-:' is never a valid command line option because it could not
146	 * distinguish ':' from the argument specifier in the options string.
147	 */
148	if (isc_commandline_option == ':' || option == NULL) {
149		if (*place == '\0')
150			isc_commandline_index++;
151
152		if (isc_commandline_errprint && *options != ':')
153			fprintf(stderr, "%s: illegal option -- %c\n",
154				isc_commandline_progname,
155				isc_commandline_option);
156
157		return (BADOPT);
158	}
159
160	if (*++option != ':') {
161		/*
162		 * Option does not take an argument.
163		 */
164		isc_commandline_argument = NULL;
165
166		/*
167		 * Skip to next argv if at the end of the current argv.
168		 */
169		if (*place == '\0')
170			++isc_commandline_index;
171
172	} else {
173		/*
174		 * Option needs an argument.
175		 */
176		if (*place != '\0')
177			/*
178			 * Option is in this argv, -D1 style.
179			 */
180			isc_commandline_argument = place;
181
182		else if (argc > ++isc_commandline_index)
183			/*
184			 * Option is next argv, -D 1 style.
185			 */
186			isc_commandline_argument = argv[isc_commandline_index];
187
188		else {
189			/*
190			 * Argument needed, but no more argv.
191			 */
192			place = ENDOPT;
193
194			/*
195			 * Silent failure with "missing argument" return
196			 * when ':' starts options string, per historical spec.
197			 */
198			if (*options == ':')
199				return (BADARG);
200
201			if (isc_commandline_errprint)
202				fprintf(stderr,
203				    "%s: option requires an argument -- %c\n",
204				    isc_commandline_progname,
205				    isc_commandline_option);
206
207			return (BADOPT);
208		}
209
210		place = ENDOPT;
211
212		/*
213		 * Point to argv that follows argument.
214		 */
215		isc_commandline_index++;
216	}
217
218	return (isc_commandline_option);
219}
220
221typedef struct {
222	HANDLE handle;
223	WIN32_FIND_DATA	find_data;
224	isc_boolean_t first_file;
225	char *filename;
226} isc_dir_t;
227
228isc_boolean_t
229start_directory(const char *path, isc_dir_t *dir) {
230	char pattern[_MAX_PATH], *p;
231
232	/*
233	 * Need space for slash-splat and final NUL.
234	 */
235	if (strlen(path) + 3 > sizeof(pattern))
236		return (ISC_FALSE);
237
238	strcpy(pattern, path);
239
240	/*
241	 * Append slash (if needed) and splat.
242	 */
243	p = pattern + strlen(pattern);
244	if (p != pattern  && p[-1] != '\\' && p[-1] != ':')
245		*p++ = '\\';
246	*p++ = '*';
247	*p++ = '\0';
248
249	dir->first_file = ISC_TRUE;
250
251	dir->handle = FindFirstFile(pattern, &dir->find_data);
252
253	if (dir->handle == INVALID_HANDLE_VALUE) {
254		dir->filename = NULL;
255		return (ISC_FALSE);
256	} else {
257		dir->filename = dir->find_data.cFileName;
258		return (ISC_TRUE);
259	}
260}
261
262isc_boolean_t
263next_file(isc_dir_t *dir) {
264	if (dir->first_file)
265		dir->first_file = ISC_FALSE;
266
267	else if (dir->handle != INVALID_HANDLE_VALUE) {
268		if (FindNextFile(dir->handle, &dir->find_data) == TRUE)
269			dir->filename = dir->find_data.cFileName;
270		else
271			dir->filename = NULL;
272
273	} else
274		dir->filename = NULL;
275
276	if (dir->filename != NULL)
277		return (ISC_TRUE);
278	else
279		return (ISC_FALSE);
280}
281
282void
283end_directory(isc_dir_t *dir) {
284	if (dir->handle != INVALID_HANDLE_VALUE)
285		FindClose(dir->handle);
286}
287
288ISC_LANG_ENDDECLS
289
290#endif /* DNS_GEN_WIN32_H */
291